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Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Susanville District Heating District Heating Low Temperature...  

Open Energy Info (EERE)

Susanville District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Susanville District Heating District Heating Low Temperature...

2

Optimal control of a multi-energy district boiler: a case study  

E-Print Network [OSTI]

Optimal control of a multi-energy district boiler: a case study J. Eynard S. Grieu M. Polit of a multi-energy district boiler (La Rochelle, France) which supplies domestic hot water and heats optimizing the use of both the tank and the wood boiler. As a result, fossil energy consumption and CO2

Paris-Sud XI, Université de

3

Pagosa Springs District Heating District Heating Low Temperature...  

Open Energy Info (EERE)

Pagosa Springs District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Pagosa Springs District Heating District Heating Low...

4

Kethcum District Heating District Heating Low Temperature Geothermal...  

Open Energy Info (EERE)

Kethcum District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Kethcum District Heating District Heating Low Temperature Geothermal...

5

Midland District Heating District Heating Low Temperature Geothermal...  

Open Energy Info (EERE)

Midland District Heating District Heating Low Temperature Geothermal Facility Facility Midland District Heating Sector Geothermal energy Type District Heating Location Midland,...

6

San Bernardino District Heating District Heating Low Temperature...  

Open Energy Info (EERE)

San Bernardino District Heating District Heating Low Temperature Geothermal Facility Facility San Bernardino District Heating Sector Geothermal energy Type District Heating...

7

Philip District Heating District Heating Low Temperature Geothermal...  

Open Energy Info (EERE)

Philip District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Philip District Heating District Heating Low Temperature Geothermal...

8

Modular approach for modelling a multi-energy district boiler Julien Eynard, Stphane Grieu1 and Monique Polit  

E-Print Network [OSTI]

Modular approach for modelling a multi-energy district boiler Julien Eynard, Stéphane Grieu1 with the modelling of a district boiler (city of La Rochelle, west coast of France), as part of the OptiEnR research project. This "multi- energy" boiler supplies domestic hot water and heats residential and public

Paris-Sud XI, Université de

9

Recover Heat from Boiler Blowdown  

SciTech Connect (OSTI)

This revised ITP tip sheet on recovering heat from boiler blowdown provides how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

Not Available

2006-01-01T23:59:59.000Z

10

Towards Intelligent District Heating.  

E-Print Network [OSTI]

??A district heating system consists of one or more production units supplying energy in the form of heated water through a distribution pipe network to (more)

Johansson, Christian

2010-01-01T23:59:59.000Z

11

Specifying Waste Heat Boilers  

E-Print Network [OSTI]

of incinerator.whether fixed bed.rotary kiln or fluid bed.Sla9ging constituents present in the gas can result in bridging of tubes by molten salts if tube spacing is not wide,particularly at the boiler inlet.Ash hoppers ,soot blowers and cleaning lanes... take various configurations as seen in Fig 1 to ~.Consultants and engineers who specify and evaluate HRSGs should be aware that several factors influence the final configuration of HRSGs.Some of these factors are discussed below. SYSTEM...

Ganapathy, V.

12

City of Klamath Falls District Heating District Heating Low Temperatur...  

Open Energy Info (EERE)

Geothermal Facility Jump to: navigation, search Name City of Klamath Falls District Heating District Heating Low Temperature Geothermal Facility Facility City of Klamath...

13

Elko County School District District Heating Low Temperature...  

Open Energy Info (EERE)

Elko County School District District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Elko County School District District Heating Low Temperature...

14

Warm Springs Water District District Heating Low Temperature...  

Open Energy Info (EERE)

Water District District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Warm Springs Water District District Heating Low Temperature Geothermal...

15

Condensing Heat Exchangers Optimize Steam Boilers  

E-Print Network [OSTI]

for Industrial Boilers" R. E. Thompson - R. J. Goldstick KVB, Inc., 18806 Skypark Blvd., Irvine, California 92714, pg. 12-4. (3) "Condensing Heat Exchangers Using Tenon R Covered Tubes", Ronald Hessen, Condensing Heat Exchanger Corp., Latham, New York...

Sullivan, B.; Sullivan, P. A.

1983-01-01T23:59:59.000Z

16

Skyscrapers and District Heating, an inter-related History 1876-1933.  

E-Print Network [OSTI]

in the United States in the late 1850s.1 A district heating system produces energy in a boiler plant - steam and electricity. This system needs a heavy infrastructure - boiler plant, pumps, and mains laid out beneath of skyscrapers is well-known;3 but the history of district heating systems less well known, this article

Boyer, Edmond

17

Clean Boiler Waterside Heat Transfer Surfaces  

SciTech Connect (OSTI)

This revised ITP tip sheet on cleaning boiler water-side heat transfer surfaces provides how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

Not Available

2006-01-01T23:59:59.000Z

18

Low Temperature Heat Recovery for Boiler Systems  

E-Print Network [OSTI]

be economically heated to within 50 0 F of the entering flue gas temperature. Other less common, but practical, uses for energy include driving a low-temperature electric turbine cycle or an absorption chilling cycle. An improvement in boiler efficiency of 3...% to 8% can normally be realized by cooling boiler flue gasses down to llO o F_200 0 F. This recovers a large quantity of the available sensible heat in most boiler flue gas streams. Efficiency can be improv ed by up to 10% if flue gas is cooled down...

Shook, J. R.; Luttenberger, D. B.

19

Resource recovery waste heat boiler upgrade  

SciTech Connect (OSTI)

The waste heat boilers installed in a 360 TPD waste to energy plant were identified as the bottle neck for an effort to increase plant capacity. These boilers were successfully modified to accommodate the increase of plant capacity to 408 TPD, improve steam cycle performance and reduce boiler tube failures. The project demonstrated how engineering and operation can work together to identify problems and develop solutions that satisfy engineering, operation, and financial objectives. Plant checking and testing, design review and specification development, installation and operation results are presented.

Kuten, P.; McClanahan, D.E. [Fluor Daniel, Inc., Houston, TX (United States); Gehring, P.R.; Toto, M.L. [SRRI, Springfield, MA (United States); Davis, J.J. [Deltak, Minon, MN (United States)

1996-09-01T23:59:59.000Z

20

EA-0923: Winnett School District Boiler Replacement Project, Winnett, Montana  

Broader source: Energy.gov [DOE]

This EA evaluates the environmental impacts of the proposal to replace the Winnett School District complex's existing oil-fired heating system with a new coal-fired heating system with funds...

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Combined Heat and Power, Waste Heat, and District Energy | Department...  

Broader source: Energy.gov (indexed) [DOE]

Combined Heat and Power, Waste Heat, and District Energy Combined Heat and Power, Waste Heat, and District Energy Presentation-given at the Fall 2011 Federal Utility Partnership...

22

Litchfield Correctional Center District Heating Low Temperature...  

Open Energy Info (EERE)

Correctional Center District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Litchfield Correctional Center District Heating Low Temperature Geothermal...

23

Guide to Combined Heat and Power Systems for Boiler Owners and...  

Broader source: Energy.gov (indexed) [DOE]

Combined Heat and Power Systems for Boiler Owners and Operators Guide to Combined Heat and Power Systems for Boiler Owners and Operators This guide presents useful information for...

24

Modern hot water district heating  

SciTech Connect (OSTI)

The history of district heating in Europe is drastically different from that in the United States. The development of district heating in northern and eastern Europe started in the early 1950s. Hot water rather than steam was used as the transport medium and the systems have proven to be more economical. Recently, the northern European concept has been introduced into two US cities - St. Paul and Willmar, Minnesota. The hot water project in St. Paul started construction and operation in the summer and fall of 1983, respectively. The entire first phase of the St. Paul project will take two summers to construct and will connect approximately 80 buildings for a total of 150 MW(t). The system spans the entire St. Paul business district and includes privately owned offices and retail buildings, city and county government buildings, hospitals, the state Capitol complex, and several industrial customers. The City of Willmar, Minnesota, replaced an old steam system with a modern hot water system in the summer of 1982. The first phase of the hot water system was constructed in the central business district. The system serves a peak thermal load of about 10 MW(t) and includes about 12,000 ft of network. The Willmar system completed the second stage of development in the fall of 1983. These two new systems demonstrate the benefits of the low-temperature hot water district heating technology. The systems are economical to build, have high reliability, and have low maintenance and operating cost.

Karnitz, M.A.; Barnes, M.H.; Kadrmas, C.; Nyman, H.O.

1984-06-01T23:59:59.000Z

25

Value of electrical heat boilers and heat pumps for wind power integration  

E-Print Network [OSTI]

Value of electrical heat boilers and heat pumps for wind power integration Peter Meibom Juha of using electrical heat boilers and heat pumps as wind power integration measures relieving the link between the heat and power production in combined heat and power plants. Each of these measures has

26

First university owned district heating system using biomass heat  

E-Print Network [OSTI]

Highlights First university owned district heating system using biomass heat Capacity: 15 MMBtu Main Campus District Heating Performance Avoided: 3500 tonnes of CO2 Particulate: less than 10 mg District Heating Goals To displace 85% of natural gas used for core campus heating. Fuel Bunker Sawmill

Northern British Columbia, University of

27

Heat Recovery Consideration for Process Heaters and Boilers  

E-Print Network [OSTI]

The largest single area for industrial energy conservation is in the improvement of combustion efficiencies for heaters and boilers. A number of methods can be employed to recover heat. The most common are by use of recuperative air preheaters...

Kumar, A.

1984-01-01T23:59:59.000Z

28

Heat Recovery Consideration for Process Heaters and Boilers  

E-Print Network [OSTI]

The largest single area for industrial energy conservation is in the improvement of combustion efficiencies for heaters and boilers. A number of methods can be employed to recover heat. The most common are by use of recuperative air preheaters...

Kumar, A.

1983-01-01T23:59:59.000Z

29

District heating feasibility, Industrial Corridor, Jamestown, New York  

SciTech Connect (OSTI)

The Industrial Corridor of Jamestown, New York, contains more than twenty industrial/manufacturing companies, whose thermal demands, in addition to space heating, include significant process heating loads. This study investigated in depth, the technical and economic feasibility of implementing a district heating system in the Industrial Corridor which can serve both process and space heating loads. Based upon the heat load assessment conducted, the study focused upon nine companies with the largest thermal demand. Alternative system implementation designs were considered including new conventional centralized boiler plants, gas turbine cogeneration, and both high temperature hot water and steam as the heat transport media in an underground distribution system. The study concluded that, in view of the nature of existing prospective customer loads being primarily steam based, the most economical system for near term phased development is a steam based system with a new conventional centrally located steam boiler plant. The economic potential for a cogeneration system was found to be sensitive to electricity buy back rates, which at present, are not attractive. Implementing a modern high temperature hot water system would require significant customer retrofit costs to convert their steam based systems to hot water, resulting in long and unattractive pay back periods. Unless customer hot water retrofit costs can be expended without penalty to the district system economics, hot water district heating is not considered economically feasible. Chapters describe heat load assessment; heat source analysis; system implementation; transmission and distribution systems assessment; institutional assessment; system economic analysis; and customer retrofit, economic analysis, and conclusions 20 figs., 22 tabs.

Not Available

1988-06-01T23:59:59.000Z

30

District Heating with Renewable Energy Webinar  

Broader source: Energy.gov [DOE]

This no cost Community Renewable Energy Success Stories webinar on "District Heating with Renewable Energy" presented by the Energy Department will feature two presentations. The first will discuss...

31

Predictive control and thermal energy storage for optimizing a multi-energy district boiler  

E-Print Network [OSTI]

and used when demand is high, instead of engaging the gas-fuel oil boiler. Keywords: multi-energy district believe that by 2015 the supply of oil and natural gas will be unable to keep up with demand [1 of La Rochelle (France) adding to the plant a controlled thermal storage tank. This plant supplies

Paris-Sud XI, Université de

32

New configurations of a heat recovery absorption heat pump integrated with a natural gas boiler for boiler efficiency improvement  

SciTech Connect (OSTI)

Conventional natural gas-fired boilers exhaust flue gas direct to the atmosphere at 150 200 C, which, at such temperatures, contains large amount of energy and results in relatively low thermal efficiency ranging from 70% to 80%. Although condensing boilers for recovering the heat in the flue gas have been developed over the past 40 years, their present market share is still less than 25%. The major reason for this relatively slow acceptance is the limited improvement in the thermal efficiency of condensing boilers. In the condensing boiler, the temperature of the hot water return at the range of 50 60 C, which is used to cool the flue gas, is very close to the dew point of the water vapor in the flue gas. Therefore, the latent heat, the majority of the waste heat in the flue gas, which is contained in the water vapor, cannot be recovered. This paper presents a new approach to improve boiler thermal efficiency by integrating absorption heat pumps with natural gas boilers for waste heat recovery (HRAHP). Three configurations of HRAHPs are introduced and discussed. The three configurations are modeled in detail to illustrate the significant thermal efficiency improvement they attain. Further, for conceptual proof and validation, an existing hot water-driven absorption chiller is operated as a heat pump at operating conditions similar to one of the devised configurations. An overall system performance and economic analysis are provided for decision-making and as evidence of the potential benefits. These three configurations of HRAHP provide a pathway to achieving realistic high-efficiency natural gas boilers for applications with process fluid return temperatures higher than or close to the dew point of the water vapor in the flue gas.

Qu, Ming [Purdue University, West Lafayette, IN; Abdelaziz, Omar [ORNL; Yin, Hongxi [Southeast University, Nanjing, China

2014-01-01T23:59:59.000Z

33

Guide to Combined Heat and Power Systems for Boiler Owners and...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Guide to Combined Heat and Power Systems for Boiler Owners and Operators, July 2004 Guide to Combined Heat and Power Systems for Boiler Owners and Operators, July 2004 Many owners...

34

Oregon Institute of Technology District Heating Low Temperature...  

Open Energy Info (EERE)

District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Oregon Institute of Technology District Heating Low Temperature Geothermal Facility Facility...

35

Fort Boise Veteran's Hospital District Heating Low Temperature...  

Open Energy Info (EERE)

Veteran's Hospital District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Fort Boise Veteran's Hospital District Heating Low Temperature Geothermal...

36

ABSORPTION HEAT PUMP IN THE DISTRICT HEATING  

E-Print Network [OSTI]

Zasulauks ­ wood-chips fired boiler house, (20 MWth) in 2013/05 · DHP Ziepniekkalns ­ wood-chips fired cogeneration unit, (4 MWel, 22 MWth) in 2013/2. · DHP Vecmlgrvis ­ wood-chips fired boilers, (2x7 MWth) in 2010, Nuremberg, 15-16.10.2013 · Cooling load is close to the set up chiller capacity · HP/chiller is designed

Oak Ridge National Laboratory

37

Results of heat tests of the TGE-435 main boiler in the PGU-190/220 combined-cycle plant of the Tyumen' TETs-2 cogeneration plant  

SciTech Connect (OSTI)

Special features of operation of a boiler operating as a combined-cycle plant and having its own furnace and burner unit are descried. The flow of flue gases on the boiler is increased due to feeding of exhaust gases of the GTU into the furnace, which intensifies the convective heat exchange. In addition, it is not necessary to preheat air in the convective heating surfaces (the boiler has no air preheater). The convective heating surfaces of the boiler are used for heating the feed water, thus replacing the regeneration extractions of the steam turbine (HPP are absent in the circuit) and partially replacing the preheating of condensate (the LPP in the circuit of the unit are combined with preheaters of delivery water). Regeneration of the steam turbine is primarily used for the district cogeneration heating purposes. The furnace and burner unit of the exhaust-heat boiler (which is a new engineering solution for the given project) ensures utilization of not only the heat of the exhaust gases of the GTU but also of their excess volume, because the latter contains up to 15% oxygen that oxidizes the combustion process in the boiler. Thus, the gas temperature at the inlet to the boiler amounts to 580{sup o}C at an excess air factor a = 3.50; at the outlet these parameters are utilized to T{sub out} = 139{sup o}C and a{sub out} = 1.17. The proportions of the GTU/boiler loads that can actually be organized at the generating unit (and have been checked by testing) are presented and the proportions of loads recommended for the most efficient operation of the boiler are determined. The performance characteristics of the boiler are presented for various proportions of GTU/boiler loads. The operating conditions of the superheater and of the convective trailing heating surfaces are presented as well as the ecological parameters of the generating unit.

A.V. Kurochkin; A.L. Kovalenko; V.G. Kozlov; A.I. Krivobok [Engineering Center of the Ural Power Industry (Russian Federation)

2007-01-15T23:59:59.000Z

38

Techno-economic analysis of renewable energy source options for a district heating project  

SciTech Connect (OSTI)

With the increased interest in exploiting renewable energy sources for district heating applications, the economic comparison of viable options has been considered as an important step in making a sound decision. In this paper, the economic performance of several energy options for a district heating system in Vancouver, British Columbia, is studied. The considered district heating system includes a 10 MW peaking/ backup natural gas boiler to provide about 40% of the annual energy requirement and a 2.5 MW base-load system. The energy options for the base-load system include: wood pellet, sewer heat, and geothermal heat. Present values of initial and operating costs of each system were calculated over 25-year service life of the systems, considering depreciation and salvage as a negative cost item. It was shown that the wood pellet heat producing technologies provided less expensive energy followed by the sewer heat recovery, geothermal and natural gas systems. Among wood pellet technologies, the grate burner was a less expensive option than powder and gasifier technologies. It was found that using natural gas as a fuel source for the peaking/backup system accounted for more than 40% of the heat production cost for the considered district heating center. This is mainly due to the high natural gas prices which cause high operating costs over the service life of the district heating system. Variations in several economic inputs did not change the ranking of the technology options in the sensitivity analysis. However, it was found that the results were more sensitive to changes in operating costs of the system than changes in initial investment. It is economical to utilize wood pellet boilers to provide the base-load energy requirement of district heating systems Moreover, the current business approach to use natural gas systems for peaking and backup in district heating systems could increase the cost of heat production significantly.

Ghafghazi, S. [University of British Columbia, Vancouver; Sowlati, T. [University of British Columbia, Vancouver; Sokhansanj, Shahabaddine [ORNL; Melin, Staffan [University of British Columbia, Vancouver

2009-09-01T23:59:59.000Z

39

Waste heat boiler optimization by entropy minimization principle  

SciTech Connect (OSTI)

A second law analysis has been undertaken for a waste heat boiler having an economizer, evaporator and superheater. Following the principle of minimization of entropy generation, a general equation for entropy generation number is derived, which incorporates all the operating variables. By differentiating the entropy generation number equation with respect to the operating parameters, various optimization parameters can be obtained. Few illustrations have been made to see the effect of various parameters on entropy generation number.

Reddy, B.V.; Murali, J.; Satheesh, V.S. [Vellore Engineering Coll. (India). Mechanical Engineering Dept.; Nag, P.K. [Indian Inst. of Tech., Kharagpur (India). Mechanical Engineering Dept.

1996-12-31T23:59:59.000Z

40

Heat Recovery Boilers for Process Applications  

E-Print Network [OSTI]

of the use of heat recovery due primarily to process considerations. On the other hand, cost and payback are main considerations in the case of gas turbine and incineration plants, where large quantities of gases are exhausted at temperatures varying from 800...

Ganapathy, V.; Rentz, J.; Flanagan, D.

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Heat Recovery Considerations for Process Heaters and Boilers  

E-Print Network [OSTI]

) Chemicals (223) 0.81xlO 15 81xl0 6 3) Pulp & Paper (8) 1.30xlO 15 2.2xI0 6 4) ~leta1s (32) O.07xlO 15 6.4x10 6 O.28xl0 15 308 291xl0 6 2.46xlO 15 Sec =Specific energy consumption * Calculated as %reduction in SEC - value 10TOR "OUSI.. SEi...Heat Recovery Considerations for Process Heaters and Boilers Ash Kumar, Pennzoil Company, Shreveport, Louisiana The largest single area for industrial energy conservation is in the improvement of combustion efficiencies for heaters and boilers...

Kumar, A.

42

Boise City Geothermal District Heating District Heating Low Temperatur...  

Open Energy Info (EERE)

66.20x109 Btuyr 19.40 GWhyr Delat T 53.00 F Load Factor 0.07 Contact Kent Johnson; 208-384-3926 References Oregon Institute of Technology's Geo-Heat Center1 Boise...

43

CHP, Waste Heat & District Energy  

Broader source: Energy.gov (indexed) [DOE]

and Applications 25 Oct 11 Today's Electric Grid What is CHP * ASHRAE Handbook: "Combined heat and power (CHP). Simultaneous production of electrical or mechanical energy and...

44

Heat Recovery Considerations for Process Heaters and Boilers  

E-Print Network [OSTI]

and boilere. A number of methods can be I~loyed to recover heat. The moat COI8)D are by use of recuperative air preheat.'la, regenerative air preheate'la and economizers. Relative advantages and applicability of the three IDIthoda are discuased... be designed for any steam pres~ur~, including sup~rc.riti('al, "1. A wic1er range ur- dcs-ign::. LS . J. Hore eificient that a iire-tub~ unit. 4. They do not l~nd th~m5elves to cOul in~) o:;!lo:;!-? vated...

Kumar, A.

45

Alaska Gateway School District Adopts Combined Heat and Power...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Alaska Gateway School District Adopts Combined Heat and Power Alaska Gateway School District Adopts Combined Heat and Power May 7, 2013 - 12:00am Addthis In Tok, Alaska, the...

46

Predictive control of supply temperature in district heating systems  

E-Print Network [OSTI]

Predictive control of supply temperature in district heating systems Torben Skov Nielsen Henrik This report considers a new concept for controlling the supply temperature in district heating systems using stochastic modelling, prediction and control. A district heating systems is a di#30;cult system to control

47

CONTROL OF SUPPLY TEMPERATURE IN DISTRICT HEATING SYSTEMS  

E-Print Network [OSTI]

CONTROL OF SUPPLY TEMPERATURE IN DISTRICT HEATING SYSTEMS T.S. Nielsen, H. Madsen Informatics the supply temperature in district heating systems using stochastic modelling, prediction and control at Roskilde Varmeforsyning. The results obtained for the Roskilde district heating utility are evaluated

48

New Mexico State University District Heating Low Temperature...  

Open Energy Info (EERE)

Heating Low Temperature Geothermal Facility Jump to: navigation, search Name New Mexico State University District Heating Low Temperature Geothermal Facility Facility New...

49

Analysis of Heating Systems and Scale of Natural Gas-Condensing Water Boilers in Northern Zones  

E-Print Network [OSTI]

In this paper, various heating systems and scale of the natural gas-condensing water boiler in northern zones are discussed, based on a technical-economic analysis of the heating systems of natural gas condensing water boilers in northern zones...

Wu, Y.; Wang, S.; Pan, S.; Shi, Y.

2006-01-01T23:59:59.000Z

50

Extension and improvement of Central Station District heating budget period 1 and 2, Krakow Clean Fossil Fuels and Energy Efficiency Program. Final report  

SciTech Connect (OSTI)

Project aim was to reduce pollution levels in the City of Krakow through the retirement of coal-fired (hand and mechanically-stoked) boiler houses. This was achieved by identifying attractive candidates and connecting them to the Krakow district heating system, thus permitting them to eliminate boiler operations. Because coal is less costly than district hot water, the district heating company Miejskie Przedsiebiorstwo Energetyki Cieplnej S.A., henceforth identified as MPEC, needed to provide potential customers with incentives for purchasing district heat. These incentives consisted of offerings which MPEC made to the prospective client. The offerings presented the economic and environmental benefits to district heating tie-in and also could include conservation studies of the facilities, so that consumption of energy could be reduced and the cost impact on operations mitigated. Because some of the targeted boiler houses were large, the capacity of the district heating network required enhancement at strategic locations. Consequently, project construction work included both enhancement to the district piping network as well as facility tie-ins. The process of securing new customers necessitated the strengthening of MPEC`s competitive position in Krakow`s energy marketplace, which in turn required improvements in marketing, customer service, strategic planning, and project management. Learning how US utilities address these challenges became an integral segment of the project`s scope.

NONE

1997-07-01T23:59:59.000Z

51

Clean Firetube Boiler Waterside Heat Transfer Surfaces, Energy Tips: STEAM, Steam Tip Sheet #7 (Fact Sheet)  

SciTech Connect (OSTI)

A steam energy tip sheet for the Advanced Manufacturing Office (AMO). The prevention of scale formation in firetube boilers can result in substantial energy savings. Scale deposits occur when calcium, magnesium, and silica, commonly found in most water supplies, react to form a continuous layer of material on the waterside of the boiler heat exchange tubes. Scale creates a problem because it typically possesses a thermal conductivity, an order of magnitude less than the corresponding value for bare steel. Even thin layers of scale serve as an effective insulator and retard heat transfer. The result is overheating of boiler tube metal, tube failures, and loss of energy efficiency. Fuel consumption may increase by up to 5% in firetube boilers because of scale. The boilers steam production may be reduced if the firing rate cannot be increased to compensate for the decrease in combustion efficiency. Energy losses as a function of scale thickness and composition are given. Any scale in a boiler is undesirable. The best way to deal with scale is not to let it form in the first place. Prevent scale formation by: (1) Pretreating of boiler makeup water (using water softeners, demineralizers, and reverse osmosis to remove scale-forming minerals); (2) Injecting chemicals into the boiler feedwater; and (3) Adopting proper boiler blowdown practices.

Not Available

2012-04-01T23:59:59.000Z

52

Geothermal: Sponsored by OSTI -- Berlin, Maryland district heating...  

Office of Scientific and Technical Information (OSTI)

Berlin, Maryland district heating assessment project Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us HomeBasic Search About Publications Advanced Search...

53

Stack Gas Heat Recovery from 100 to 1200 HP Boilers  

E-Print Network [OSTI]

in reduced production and caused personnel layoffs. U.S. Government reports indicate that roughly 20% of all fuel is consumed in boilers. A savings in boiler fuel consumption can have a positive impact on energy conservation, and become an important component...

Judson, T. H.

1980-01-01T23:59:59.000Z

54

U.S. geothermal district heating : barriers and enablers  

E-Print Network [OSTI]

Geothermal district heating experience in the U.S. is reviewed and evaluated to explore the potential impact of utilizing this frequently undervalued renewable energy resource for space and hot water heating. Although the ...

Thorsteinsson, Hildigunnur H

2008-01-01T23:59:59.000Z

55

Solar heat storages in district heating Klaus Ellehauge Thomas Engberg Pedersen  

E-Print Network [OSTI]

July 2007 . #12;#12;Solar heat storages in district heating networks July 2007 Klaus Ellehauge 97 22 11 tep@cowi.dk www.cowi.com #12;#12;Solar heat storages in district heating networks 5 in soil 28 5.3 Other experienced constructions: 30 6 Consequences of establishing solar heat in CHP areas

56

Cold End Inserts for Process Gas Waste Heat Boilers Air Products, operates hydrogen production plants, which utilize large waste heat boilers (WHB)  

E-Print Network [OSTI]

Cold End Inserts for Process Gas Waste Heat Boilers Overview Air Products, operates hydrogen walls. Air Products tasked our team to design an insert to place in the tubes of the WHB to increase flow velocity, thereby reducing fouling of the WHB. Objectives Air Products wishes that our team

Demirel, Melik C.

57

Including radiative heat transfer and reaction quenching in modeling a Claus plant waste heat boiler  

SciTech Connect (OSTI)

Due to increasingly stringent sulfur emission regulations, improvements are necessary in the modified Claus process. A recently proposed model by Nasato et al. for the Claus plant waste heat boiler (WHB) is improved by including radiative heat transfer, which yields significant changes in the predicted heat flux and the temperature profile along the WHB tube, leading to a faster quenching of chemical reactions. For the WHB considered, radiation accounts for approximately 20% of the heat transferred by convection alone. More importantly, operating the WHB at a higher gas mass flux is shown to enhance reaction quenching, resulting in a doubling of the predicted hydrogen flow rate. This increase in hydrogen flow rate is sufficient to completely meet the hydrogen requirement of the H[sub 2]S recovery process considered, which would eliminate the need for a hydrogen plant.

Karan, K.; Mehrotra, A.K.; Behie, L.A. (Univ. of Calgary, Alberta (Canada). Dept. of Chemical and Petroleum Engineering)

1994-11-01T23:59:59.000Z

58

Potential benefits of a resource-recovery facility coupled with district heating in Detroit, Michigan  

SciTech Connect (OSTI)

The City of Detroit, Michigan, announced plans for a 2.7-Gg/d (3000-ton/d) Resource Recovery Facility to be located in the central part of the city. The facility will process and burn waste collected by the municipal forces. Steam generated in the facility's boilers will be used to produce electricity; the surplus electricity will be sold to the Detroit Edison Company. When needed by the Central Heating System (CHS), large portions of the steam can be extracted from the turbine and sold to the Detroit Edison Company. The facility will meet its primary purpose of greatly relieving Detroit's solid waste disposal problem. A second very important benefit is that it will be a source of reasonably priced steam for the CHS, which serves the downtown area. Detroit is now in a local depression, and the downtown areas have suffered urban decay. The city is focusing on the redevelopment of these areas, and a viable, cost-effective district heating system would be a major asset. Currently, the CHS is losing money, although it charges relatively high rates for steam, because it uses primarily natural gas to generate steam. The economic feasibility of converting the CHS's relatively oil boiler units to burn coal, a much cheaper fuel, is doubtful. The Resource Recovery Facility can provide CHS with a major part of its steam needs at competitive prices in the near future. This would do much to relieve the CHS's financial problems and help it to become a viable system. This, in turn, would assist the city in the redevelopment of the downtown areas. An overall strategy for district heating in Detroit is being developed. It is suggested that a comprehensive study of a regional district heating system in the city be made.

McLain, H.A.; Brinker, M.J.; Gatton, D.W.

1982-09-01T23:59:59.000Z

59

Building America Case Study: Boiler Control Replacement for Hydronically Heated Multifamily Buildings, Cambridge, Massachusetts (Fact Sheet)  

SciTech Connect (OSTI)

The ARIES Collaborative, a U.S. Department of Energy Building America research team, partnered with NeighborWorks America affiliate Homeowners' Rehab Inc. (HRI) of Cambridge, Massachusetts, to study improvements to the central hydronic heating system in one of the nonprofit's housing developments. The heating controls in the three-building, 42-unit Columbia Cambridge Alliance for Spanish Tenants housing development were upgraded. Fuel use in the development was excessive compared to similar properties. A poorly insulated thermal envelope contributed to high energy bills, but adding wall insulation was not cost-effective or practical. The more cost-effective option was improving heating system efficiency. Efficient operation of the heating system faced several obstacles, including inflexible boiler controls and failed thermostatic radiator valves. Boiler controls were replaced with systems that offer temperature setbacks and one that controls heat based on apartment temperature in addition to outdoor temperature. Utility bill analysis shows that post-retrofit weather-normalized heating energy use was reduced by 10%-31% (average of 19%). Indoor temperature cutoff reduced boiler runtime (and therefore heating fuel consumption) by 28% in the one building in which it was implemented. Nearly all savings were obtained during night which had a lower indoor temperature cut off (68 degrees F) than day (73 degrees F). This implies that the outdoor reset curve was appropriately adjusted for this building for daytime operation. Nighttime setback of heating system supply water temperature had no discernable impact on boiler runtime or gas bills.

Not Available

2014-11-01T23:59:59.000Z

60

Hydronic Heating Retrofits for Low-Rise Multifamily Buildings: Boiler Control Replacement and Monitoring  

SciTech Connect (OSTI)

The ARIES Collaborative, a U.S. Department of Energy Building America research team, partnered with NeighborWorks America affiliate Homeowners' Rehab Inc. (HRI) of Cambridge, Massachusetts, to study improvements to the central hydronic heating system in one of the nonprofit's housing developments. The heating controls in the three-building, 42-unit Columbia Cambridge Alliance for Spanish Tenants housing development were upgraded. Fuel use in the development was excessive compared to similar properties. A poorly insulated thermal envelope contributed to high energy bills, but adding wall insulation was not cost-effective or practical. The more cost-effective option was improving heating system efficiency. Efficient operation of the heating system faced several obstacles, including inflexible boiler controls and failed thermostatic radiator valves. Boiler controls were replaced with systems that offer temperature setbacks and one that controls heat based on apartment temperature in addition to outdoor temperature. Utility bill analysis shows that post-retrofit weather-normalized heating energy use was reduced by 10%-31% (average of 19%). Indoor temperature cutoff reduced boiler runtime (and therefore heating fuel consumption) by 28% in the one building in which it was implemented. Nearly all savings were obtained during night which had a lower indoor temperature cut off (68 degrees F) than day (73 degrees F). This implies that the outdoor reset curve was appropriately adjusted for this building for daytime operation. Nighttime setback of heating system supply water temperature had no discernable impact on boiler runtime or gas bills.

Dentz, J.; Henderson, H.; Varshney, K.

2014-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Thermodynamic Analysis of Combined Cycle District Heating System  

E-Print Network [OSTI]

generation systems that include a 10 MW Solar combustion gas turbine, a 4-MW steam turbine, a 100,000 pph heat recovery steam generator (HRSG), three 125,000 pph package boilers, and auxiliary equipment. In the analysis, actual system data is used to assess...

Suresh, S.; Gopalakrishnan, H.; Kosanovic, D.

2011-01-01T23:59:59.000Z

62

A Geothermal District-Heating System and Alternative Energy Research...  

Open Energy Info (EERE)

District-Heating System and Alternative Energy Research Park on the NM Tech Campus Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title A...

63

Compliance testing of Grissom AFB, Central Heating Plant coal-fired boilers 3, 4 and 5, Grissom AFB, Indiana. Final report, 3-13 Dec 90  

SciTech Connect (OSTI)

Source compliance testing (particulates and visible emissions) of boiler 3, 4 and 5 in the Grissom AFB Central Heating Plant was accomplished 3-13 Dec 90. The boilers were all tested through the bypass stack. Visible emissions from the three boilers met applicable opacity regulations. However, particulate emissions from the three boilers were above their applicable emission standards.

Vaughn, R.W.

1991-03-01T23:59:59.000Z

64

District heating/cooling potential in New York City. phase 1. Final report  

SciTech Connect (OSTI)

New York City through its Energy Office has identified and evaluated the technical and economic feasibility of district heating and cooling at three locations: Brooklyn Navy Yard, Kings County Medical Complex, and the S.W. Brooklyn Incinerator. Of these the Navy Yard has the most immediate potential for implementation. The Navy Yard has an extensive steam and electrical system that has not been used since the Navy turned most of the property over to New York City more than a decade ago. By remodeling several of the smaller boilers still in place or purchasing new boilers, an ample supply of steam and hot water can be produced. The steam will be used for heating and industrial process for the industrial tenants now occupying the former yards. Hot water will be sold to the New York City Housing Authority to heat between 3,500 and 5,000 nearby public housing units operated by the authority. Electricity will be cogenerated using present generators that will be overhauled. It is expected that some of the electricity will be used directly to supply power to a planned nearby Red Hook Sewage Treatment plant, while most will be sold to the industrial tenants of the Navy Yard. Studies will continue to determine the best market for excess power.

McLoughlin, G.T.; Kuo, R.P.; Karol, J.

1983-02-01T23:59:59.000Z

65

Biomass Boiler to Heat Oregon School | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy UsageAUDITVehiclesTankless orA BRIEFApril 2015CommerceDepartment ofBioenergyBoiler to

66

Method of prevention of deposits in the pipes of waste heat boilers  

SciTech Connect (OSTI)

A process is disclosed for preventing deposits in the pipes of waste heat boilers employed for cooling gases in the partial autothermal oxidation of fossil fuels to prepare hydrogen or synthesis gases, wherein the pipes are flushed, at the operating temperature, with hydrogen-containing gases which contain little or no H/sub 2/S.

Gettert, H.; Kaempfer, K.

1983-12-13T23:59:59.000Z

67

Slovak Centre of Biomass Use for Energy Wood Fired Heating Plant in Slovakia  

E-Print Network [OSTI]

brown-coal fired boilers with low efficiency. The special furnace design ensures that woody biofuel authorities CHP Planning issues Transport companies District Heating Sustainable communities Utilities Solar

68

District Wide Geothermal Heating Conversion Blaine County School District |  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat Pump Models |Conduct, Parent(CRADA and DOW Area 5(Presentation)Distribution:

69

Co-sponsored second quarter progress review conference on district heating  

SciTech Connect (OSTI)

A summary of the progress review conference on district heating and cooling systems is presented. The agenda and lists of speakers and attendees are presented. A history of district heating and some present needs and future policies are given and an excerpt from the National District Heating Program Strategy (DOE, March 1980) is included. Following the presentation, District Heating and Cooling Systems Program, by Alan M. Rubin, a fact sheet on DOE's Integrated Community Energy Systems Program and information from an oral presentation, District Heating and Cooling Systems for Communities Through Power Plant Retrofit Distribution Network, are given. The Second Quarterly Oral Report to the US DOE on the District Heating and Cooling Project in Detroit; the executive summary of the Piqua, Ohio District Heating and Cooling Demonstration Project; the Second Quarterly Report of the Moorehead, Minnesota District Heating Project; and the report from the Moorehead, Minnesota mayor on the Hot Water District Heating Project are presented.

None

1980-01-01T23:59:59.000Z

70

1992 National census for district heating, cooling and cogeneration  

SciTech Connect (OSTI)

District energy systems are a major part of the energy use and delivery infrastructure of the United States. With nearly 6,000 operating systems currently in place, district energy represents approximately 800 billion BTU per hour of installed thermal production capacity, and provides over 1.1 quadrillion BTU of energy annually -- about 1.3% of all energy used in the US each year. Delivered through more that 20,000 miles of pipe, this energy is used to heat and cool almost 12 billion square feet of enclosed space in buildings that serve a diverse range of office, education, health care, military, industrial and residential needs. This Census is intended to provide a better understanding of the character and extent of district heating, cooling and cogeneration in the United States. It defines a district energy system as: Any system that provides thermal energy (steam, hot water, or chilled water) for space heating, space cooling, or process uses from a central plant, and that distributes the energy to two or more buildings through a network of pipes. If electricity is produced, the system is a cogenerating facility. The Census was conducted through surveys administered to the memberships of eleven national associations and agencies that collectively represent the great majority of the nation`s district energy system operators. Responses received from these surveys account for about 11% of all district systems in the United States. Data in this report is organized and presented within six user sectors selected to illustrate the significance of district energy in institutional, community and utility settings. Projections estimate the full extent of district energy systems in each sector.

Not Available

1993-07-01T23:59:59.000Z

71

City of Allentown assessment of a district heating system  

SciTech Connect (OSTI)

The energy sources selected to accommodate the heat load consist of five 10 MWt units at the high temperature hot water generating station, ten 10 MWt units at the high temperature hot water generating station, and two 25 MWe (37.5 MWt) cogenerating fluidized bed combustion units at the incinerator site. The service area selected consists of the downtown commercial district. Total peak heat load for the forty seven block commercial district and twenty two industrial customers is estimated to be 187 MWt. The following aspects are covered: transmission and distribution piping systems, development strategy, capital costs and construction schedule, operation, economics, environmental analysis, and community impact.

Oliker, I.; Tamayne, T.

1982-09-01T23:59:59.000Z

72

Assessment of district energy supply from Schiller Generating Station  

SciTech Connect (OSTI)

This paper addresses the feasibility analysis of retrofitting the Public Service of New Hampshire Schiller Generating Station to supply district heating to potential customers. The project involved analysis of power plant retrofit and comparison of district heating cost to the cost of heat supplied with gas boilers for a housing development in close proximity to the Schiller Station.

Hitchko, M. [Public Service Company of New Hampshire, Portsmouth, NH (United States); Major, W. [Joseph Technology Corporation, Inc., Woodcliff Lake, NJ (United States)

1995-06-01T23:59:59.000Z

73

Expert Meeting: Optimized Heating Systems Using Condensing Boilers and Baseboard Convectors  

SciTech Connect (OSTI)

On August 11, 2011, in Denver, CO, a Building America Expert Meeting was held in conjunction with the Building America Residential Energy Efficiency Technical Update Meeting, to review and discuss results and future plans for research to improve the performance of hydronic heating systems using condensing boilers and baseboard convectors. A meeting objective was to provide an opportunity for other Building America teams and industry experts to provide feedback and specific suggestions for the planned research.

Arena, L.

2013-01-01T23:59:59.000Z

74

Community Renewable Energy Success Stories Webinar: District Heating with Renewable Energy (text version)  

Office of Energy Efficiency and Renewable Energy (EERE)

Below is the text version of the webinar titled "District Heating with Renewable Energy," originally presented on November 20, 2012.

75

School of Architecture, Design and the Built Environment Delta T optimisation of district heating network  

E-Print Network [OSTI]

School of Architecture, Design and the Built Environment Delta T optimisation of district heating of any network. Most existing district heating systems work at small (10-15 C) delta T. Although for the conventional and optimised design of the district heating network. The network operation will be simulated

Evans, Paul

76

A Functional Regression Approach for Prediction in a District-Heating System  

E-Print Network [OSTI]

A Functional Regression Approach for Prediction in a District-Heating System Aldo Goia Dipartimento in a district heating sys- tem. Our dataset consists of four separated periods, with 198 days each period and 24 load forecasting, district heat- ing system Introduction Among the activities of support

Paris-Sud XI, Universit de

77

Optimization of waste heat recovery boiler of a combined cycle power plant  

SciTech Connect (OSTI)

This paper describes the details of a procedure developed for optimization of a waste heat recovery boiler (WHRB) of a combined cycle power plant (CCPP) using the program for performance prediction of a typical CCPP, details of which have been presented elsewhere (Seyedan et al., 1994). In order to illustrate the procedure, the optimum design of a WHRB for a typical CCPP (employing dual-pressure bottoming cycle) built by a prominent Indian company, has been carried out. The present design of a WHRB is taken as the base design and the newer designs generated by this procedure are compared with it to assess the extent of cost reduction possible.

Seyedan, B.; Dhar, P.L.; Gaur, R.R. [Indian Inst. of Tech., New Delhi (India). Dept. of Mechanical Engineering; Bindra, G.S. [Bharat Heavy Electrical Ltd., New Delhi (India)

1996-07-01T23:59:59.000Z

78

Life cycle assessment of base-load heat sources for district heating system options  

SciTech Connect (OSTI)

Purpose There has been an increased interest in utilizing renewable energy sources in district heating systems. District heating systems are centralized systems that provide heat for residential and commercial buildings in a community. While various renewable and conventional energy sources can be used in such systems, many stakeholders are interested in choosing the feasible option with the least environmental impacts. This paper evaluates and compares environmental burdens of alternative energy source options for the base load of a district heating center in Vancouver, British Columbia (BC) using the life cycle assessment method. The considered energy sources include natural gas, wood pellet, sewer heat, and ground heat. Methods The life cycle stages considered in the LCA model cover all stages from fuel production, fuel transmission/transportation, construction, operation, and finally demolition of the district heating system. The impact categories were analyzed based on the IMPACT 2002+ method. Results and discussion On a life-cycle basis, the global warming effect of renewable energy options were at least 200 kgeqCO2 less than that of the natural gas option per MWh of heat produced by the base load system. It was concluded that less than 25% of the upstream global warming impact associated with the wood pellet energy source option was due to transportation activities and about 50% of that was resulted from wood pellet production processes. In comparison with other energy options, the wood pellets option has higher impacts on respiratory of inorganics, terrestrial ecotoxicity, acidification, and nutrification categories. Among renewable options, the global warming impact of heat pump options in the studied case in Vancouver, BC, were lower than the wood pellet option due to BC's low carbon electricity generation profile. Ozone layer depletion and mineral extraction were the highest for the heat pump options due to extensive construction required for these options. Conclusions Natural gas utilization as the primary heat source for district heat production implies environmental complications beyond just the global warming impacts. Diffusing renewable energy sources for generating the base load district heat would reduce human toxicity, ecosystem quality degradation, global warming, and resource depletion compared to the case of natural gas. Reducing fossil fuel dependency in various stages of wood pellet production can remarkably reduce the upstream global warming impact of using wood pellets for district heat generation.

Ghafghazi, Saeed [University of British Columbia, Vancouver; Sowlati, T. [University of British Columbia, Vancouver; Sokhansanj, Shahabaddine [ORNL; Melin, Staffan [Delta Research Corporation

2011-03-01T23:59:59.000Z

79

Guide to Combined Heat and Power Systems for Boiler Owners and Operators  

SciTech Connect (OSTI)

Combined heat and power (CHP) or cogeneration is the sequential production of two forms of useful energy from a single fuel source. In most CHP applications, chemical energy in fuel is converted to both mechanical and thermal energy. The mechanical energy is generally used to generate electricity, while the thermal energy or heat is used to produce steam, hot water, or hot air. Depending on the application, CHP is referred to by various names including Building Cooling, Heating, and Power (BCHP); Cooling, Heating, and Power for Buildings (CHPB); Combined Cooling, Heating, and Power (CCHP); Integrated Energy Systems (IES), or Distributed Energy Resources (DER). The principal technical advantage of a CHP system is its ability to extract more useful energy from fuel compared to traditional energy systems such as conventional power plants that only generate electricity and industrial boiler systems that only produce steam or hot water for process applications. By using fuel energy for both power and heat production, CHP systems can be very energy efficient and have the potential to produce electricity below the price charged by the local power provider. Another important incentive for applying cogeneration technology is to reduce or eliminate dependency on the electrical grid. For some industrial processes, the consequences of losing power for even a short period of time are unacceptable. The primary objective of the guide is to present information needed to evaluate the viability of cogeneration for new or existing industrial, commercial, and institutional (ICI) boiler installations and to make informed CHP equipment selection decisions. Information presented is meant to help boiler owners and operators understand the potential benefits derived from implementing a CHP project and recognize opportunities for successful application of cogeneration technology. Topics covered in the guide follow: (1) an overview of cogeneration technology with discussions about benefits of applying cogeneration technology and barriers to implementing cogeneration technology; (2) applicable federal regulations and permitting issues; (3) descriptions of prime movers commonly used in CHP applications, including discussions about design characteristics, heat-recovery options and equipment, fuels and emissions, efficiency, maintenance, availability, and capital cost; (4) electrical generators and electrical interconnection equipment; (5) cooling and dehumidification equipment; (6) thermodynamic cycle options and configurations; (7) steps for evaluating the technical and economic feasibility of applying cogeneration technology; and (8) information sources.

Oland, CB

2004-08-19T23:59:59.000Z

80

Compliance testing of Grissom AFB Central Heating Plant coal-fired boilers 3, 4, and 5, Grissom AFB, Indiana. Final report, 29 January-15 February 1989  

SciTech Connect (OSTI)

At the request of HQ, SAC/SGPB source compliance testing (particulate and visible emissions) of boilers 3, 4, and 5 in the Grissom AFB Central Heating Plant was accomplished 29 Jan-15 Feb 89. The survey was conducted to determine compliance with regards to Indiana Administrative Code, Title 325 - Air Pollution Control Board, Article 5, Opacity Regulations, and Article 6, Particulate Regulations. Boiler 3 was tested through scrubber B, Boiler 4 through scrubber A, and Boiler 5 through scrubber B and the bypass stack. Results indicate that each boiler met applicable visible and particulate emission standards.

Garrison, J.A.

1989-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Cost-efficient monitoring of water quality in district heating systems This article examines the monitoring strategy for water quality in a large Danish district  

E-Print Network [OSTI]

Cost-efficient monitoring of water quality in district heating systems This article examines the monitoring strategy for water quality in a large Danish district heating system and makes a proposal for a technical and economic improvement. Monitoring of water quality in district heating systems is necessary

82

Final Report, Materials for Industrial Heat Recovery Systems, Tasks 3 and 4 Materials for Heat Recovery in Recovery Boilers  

SciTech Connect (OSTI)

The DOE-funded project on materials for industrial heat recovery systems included four research tasks: materials for aluminum melting furnace recuperator tubes, materials and operational changes to prevent cracking and corrosion of the co-extruded tubes that form primary air ports in black liquor recovery boilers, the cause of and means to prevent corrosion of carbon steel tubes in the mid-furnace area of recovery boilers, and materials and operational changes to prevent corrosion and cracking of recovery boiler superheater tubes. Results from studies on the latter two topics are given in this report while separate reports on results for the first two tasks have already been published. Accelerated, localized corrosion has been observed in the mid-furnace area of kraft recovery boilers. This corrosion of the carbon steel waterwall tubes is typically observed in the vicinity of the upper level of air ports where the stainless clad co-extruded wall tubes used in the lower portion of the boiler are welded to the carbon steel tubes that extend from this transition point or cut line to the top of the boiler. Corrosion patterns generally vary from one boiler to another depending on boiler design and operating parameters, but the corrosion is almost always found within a few meters of the cut line and often much closer than that. This localized corrosion results in tube wall thinning that can reach the level where the integrity of the tube is at risk. Collection and analysis of gas samples from various areas near the waterwall surface showed reducing and sulfidizing gases were present in the areas where corrosion was accelerated. However, collection of samples from the same areas at intervals over a two year period showed the gaseous environment in the mid-furnace section can cycle between oxidizing and reducing conditions. These fluctuations are thought to be due to gas flow instabilities and they result in an unstable or a less protective scale on the carbon steel tubes. Also, these fluctuating air flow patterns can result in deposition of black liquor on the wall tubes, and during periods when deposition is high, there is a noticeable increase in the concentrations of sulfur-bearing gases like hydrogen sulfide and methyl mercaptan. Laboratory studies have shown that chromized and aluminized surface treatments on carbon steel improve the resistance to sulfidation attack. Studies of superheater corrosion and cracking have included laboratory analyses of cracked tubes, laboratory corrosion studies designed to simulate the superheater environment and field tests to study the movement of superheater tubes and to expose a corrosion probe to assess the corrosion behavior of alternate superheater alloys, particularly alloys that would be used for superheaters operating at higher temperatures and higher pressures than most current boilers. In the laboratory corrosion studies, samples of six alternate materials were immersed in an aggressive, low melting point salt mixture and exposed for times up to 336 h, at temperatures of 510, 530 or 560C in an inert or reactive cover gas. Using weight change and results of metallographic examination, the samples were graded on their resistance to the various environments. For the superheater corrosion probe studies, samples of the same six materials were exposed on an air-cooled corrosion probe exposed in the superheater section of a recovery boiler for 1000 h. Post exposure examination showed cracking and/or subsurface attack in the samples exposed at the higher temperatures with the attack being more severe for samples 13 exposed above the first melting temperature of the deposits that collected on the superheater tubes. From these superheater studies, a ranking was developed for the six materials tested. The task addressing cracking and corrosion of primary air port tubes that was part of this project produced results that have been extensively implemented in recovery boilers in North America, the Nordic countries and many other parts of the world. By utilizing these results, boilers ar

Keiser, James R.; Kish, Joseph R.; Singh, Preet M.; Sarma, Gorti B.; Yuan, Jerry; Gorog, J. Peter; Frederick, Laurie A.; Jette, Francois R.; Meisner, Roberta A.; Singbeil, Douglas L.

2007-12-31T23:59:59.000Z

83

Ukraine Kievenergo district heating project. Volume 1. Export trade information  

SciTech Connect (OSTI)

This study, conducted by Joseph Technolgoy Corporation, was funded by the U.S. Trade and Development Agency. The purpose of this study was directed toward increasing the heat capacity, reducing fuel costs and import requirements, bringing about energy efficiency in the Kiev District Heating (DH) system; improving environmental conditions in affected areas; and supporting the strengthening and restructuring of Kiev, DH institutions and development of the DH sector. The report lists project risks and offers recommendations to minimize these risks. Also included are detailed cost estimates and financial analyses. The report is divided into the following sections: (1) Acknowledgement, (2) Project Summary, (3) Abbreviations, (4) I. Sector Background and Objectives, (5) II. The Project, (6) III. Implementing Agencies, (7) IV. Financial Aspects, (8) V. Project Benefits and Risks, (9) VI. Agreements to be Reached and Recommendations, (10) Annexes.

NONE

1997-04-01T23:59:59.000Z

84

Recovery of Water from Boiler Flue Gas Using Condensing Heat Exchangers  

SciTech Connect (OSTI)

Most of the water used in a thermoelectric power plant is used for cooling, and DOE has been focusing on possible techniques to reduce the amount of fresh water needed for cooling. DOE has also been placing emphasis on recovery of usable water from sources not generally considered, such as mine water, water produced from oil and gas extraction, and water contained in boiler flue gas. This report deals with development of condensing heat exchanger technology for recovering moisture from flue gas from coal-fired power plants. The report describes: (1) An expanded data base on water and acid condensation characteristics of condensing heat exchangers in coal-fired units. This data base was generated by performing slip stream tests at a power plant with high sulfur bituminous coal and a wet FGD scrubber and at a power plant firing high-moisture, low rank coals. (2) Data on typical concentrations of HCl, HNO{sub 3} and H{sub 2}SO{sub 4} in low temperature condensed flue gas moisture, and mercury capture efficiencies as functions of process conditions in power plant field tests. (3) Theoretical predictions for sulfuric acid concentrations on tube surfaces at temperatures above the water vapor dewpoint temperature and below the sulfuric acid dew point temperature. (4) Data on corrosion rates of candidate heat exchanger tube materials for the different regions of the heat exchanger system as functions of acid concentration and temperature. (5) Data on effectiveness of acid traps in reducing sulfuric acid concentrations in a heat exchanger tube bundle. (6) Condensed flue gas water treatment needs and costs. (7) Condensing heat exchanger designs and installed capital costs for full-scale applications, both for installation immediately downstream of an ESP or baghouse and for installation downstream of a wet SO{sub 2} scrubber. (8) Results of cost-benefit studies of condensing heat exchangers.

Edward Levy; Harun Bilirgen; John DuPoint

2011-03-31T23:59:59.000Z

85

Recovery of Water from Boiler Flue Gas Using Condensing Heat Exchangers  

SciTech Connect (OSTI)

Most of the water used in a thermoelectric power plant is used for cooling, and DOE has been focusing on possible techniques to reduce the amount of fresh water needed for cooling. DOE has also been placing emphasis on recovery of usable water from sources not generally considered, such as mine water, water produced from oil and gas extraction, and water contained in boiler flue gas. This report deals with development of condensing heat exchanger technology for recovering moisture from flue gas from coal-fired power plants. The report describes: An expanded data base on water and acid condensation characteristics of condensing heat exchangers in coal-fired units. This data base was generated by performing slip stream tests at a power plant with high sulfur bituminous coal and a wet FGD scrubber and at a power plant firing highmoisture, low rank coals. Data on typical concentrations of HCl, HNO{sub 3} and H{sub 2}SO{sub 4} in low temperature condensed flue gas moisture, and mercury capture efficiencies as functions of process conditions in power plant field tests. Theoretical predictions for sulfuric acid concentrations on tube surfaces at temperatures above the water vapor dewpoint temperature and below the sulfuric acid dew point temperature. Data on corrosion rates of candidate heat exchanger tube materials for the different regions of the heat exchanger system as functions of acid concentration and temperature. Data on effectiveness of acid traps in reducing sulfuric acid concentrations in a heat exchanger tube bundle. Condensed flue gas water treatment needs and costs. Condensing heat exchanger designs and installed capital costs for full-scale applications, both for installation immediately downstream of an ESP or baghouse and for installation downstream of a wet SO{sub 2} scrubber. Results of cost-benefit studies of condensing heat exchangers.

Levy, Edward; Bilirgen, Harun; DuPont, John

2011-03-31T23:59:59.000Z

86

Experimental investigation on heat transfer and frictional characteristics of vertical upward rifled tube in supercritical CFB boiler  

SciTech Connect (OSTI)

Water wall design is a key issue for supercritical Circulating Fluidized Bed (CFB) boiler. On account of the good heat transfer performance, rifled tube is applied in the water wall design of a 600 MW supercritical CFB boiler in China. In order to investigate the heat transfer and frictional characteristics of the rifled tube with vertical upward flow, an in-depth experiment was conducted in the range of pressure from 12 to 30 MPa, mass flux from 230 to 1200 kg/(m{sup 2} s), and inner wall heat flux from 130 to 720 kW/m{sup 2}. The wall temperature distribution and pressure drop in the rifled tube were obtained in the experiment. The normal, enhanced and deteriorated heat transfer characteristics were also captured. In this paper, the effects of pressure, inner wall heat flux and mass flux on heat transfer characteristics are analyzed, the heat transfer mechanism and the frictional resistance performance are discussed, and the corresponding empirical correlations are presented. The experimental results show that the rifled tube can effectively prevent the occurrence of departure from nucleate boiling (DNB) and keep the tube wall temperature in a permissible range under the operating condition of supercritical CFB boiler. (author)

Yang, Dong; Pan, Jie; Zhu, Xiaojing; Bi, Qincheng; Chen, Tingkuan [State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049 (China); Zhou, Chenn Q. [Department of Mechanical Engineering, Purdue University Calumet, Hammond, IN 46323 (United States)

2011-02-15T23:59:59.000Z

87

Municipal District Heating and Cooling Co-generation System Feasibility Research  

E-Print Network [OSTI]

In summer absorption refrigerating machines provide cold water using excess heat from municipal thermoelectric power plant through district heating pipelines, which reduces peak electric load from electricity networks in summer. The paper simulates...

Zhang, W.; Guan, W.; Pan, Y.; Ding, G.; Song, X.; Zhang, Y.; Li, Y.; Wei, H.; He, Y.

2006-01-01T23:59:59.000Z

88

"Potential for Combined Heat and Power and District Heating and Cooling from Waste-to-Energy Facilities in the U.S. Learning from the Danish Experience"  

E-Print Network [OSTI]

is used for the generation of electricity. The advantages of district heating using WTE plants are heating and cooling system in Indianapolis. However, there are few U.S. hot water district heating systems,800 district heating and cooling systems, providing 320 million MWh of thermal energy. Currently, 28 of the 88

Shepard, Kenneth

89

Boiler Maximum Achievable Control Technology (MACT) Technical...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

for Industrial, Commercial, and Institutional (ICI) Boilers and Process Heaters, February 2013 Guide to Combined Heat and Power Systems for Boiler Owners and Operators, July 2004...

90

Union County - La Grande, Oregon geothermal district heating: feasibility assessment. Final report  

SciTech Connect (OSTI)

This report presents an assessment of geothermal district heating in the City of La Grande, Oregon. Eight study area districts were analyzed to determine their economic feasibility. Results from the analyses conclude that certain districts within the City of La Grande are economically feasible if certain assumptions are correct. Development of geothermal district heating for these areas would provide direct energy and dollar savings to the building owners and would also provide direct and indirect benefits to low and moderate income households within the City.

Jenkins, H. II; Giddings, M.; Hanson, P.

1982-09-01T23:59:59.000Z

91

Photoreversible Micellar Solution as a Smart Drag-Reducing Fluid for Use in District Heating/Cooling Systems  

E-Print Network [OSTI]

Photoreversible Micellar Solution as a Smart Drag-Reducing Fluid for Use in District Heating solution is developed as a promising working fluid for district heating/cooling systems (DHCs). It can systems. A promising application of DR fluids is in district heating/ cooling systems (DHCs)9

Raghavan, Srinivasa

92

Optimal Operation of a Waste Incineration Plant for District Heating Johannes Jaschke, Helge Smedsrud, Sigurd Skogestad*, Henrik Manum  

E-Print Network [OSTI]

Optimal Operation of a Waste Incineration Plant for District Heating Johannes Jaschke, Helge@chemeng.ntnu.no off-line. This systematic approach is here applied to a waste incineration plant for district heating. In district heating networks, operators usually wish to ob- tain the lowest possible return temperature

Skogestad, Sigurd

93

RENEWABLES RESEARCH Boiler Burner Energy System Technology  

E-Print Network [OSTI]

RENEWABLES RESEARCH Boiler Burner Energy System Technology (BBEST) for Firetube Boilers PIER Renewables Research September 2010 The Issue Researchers at Altex Technologies Corporation in Sunnyvale, industrial combined heat and power (CHP) boiler burner energy system technology ("BBEST"). Their research

94

Modeling reaction quench times in the waste heat boiler of a Claus plant  

SciTech Connect (OSTI)

At the high temperatures found in the modified Claus reaction furnace, the thermal decomposition and oxidation of H[sub 2]S yields large quantities of desirable products, gaseous hydrogen (H[sub 2]) and sulfur (S[sub 2]). However, as the temperature of the gas stream is lowered in the waste heat boiler (WHB) located downstream of the furnace, the reverse reaction occurs leading to reassociation of H[sub 2] and S[sub 2] molecules. To examine the reaction quenching capabilities of the WHB, a rigorous computer model was developed incorporating recently published intrinsic kinetic data. A sensitivity study performed with the model demonstrated that WHBs have a wide range of operation with gas mass flux in the tubes from 4 to 24 kg/(m[sup 2] [center dot] s). Most important, the model showed that is was possible to operate WHBs such that quench times could be decreased to 40 ms, which is a reduction by 60% compared to a base case scenario. Furthermore, hydrogen production could be increased by over 20% simply by reconfiguring the WHB tubes.

Nasato, L.V.; Karan, K.; Mehrotra, A.K.; Behie, L.A. (Univ. of Calgary, Alberta (Canada). Dept. of Chemical and Petroleum Engineering)

1994-01-01T23:59:59.000Z

95

Energy recovery from waste incineration: Assessing the importance of district heating networks  

SciTech Connect (OSTI)

Municipal solid waste incineration contributes with 20% of the heat supplied to the more than 400 district heating networks in Denmark. In evaluation of the environmental consequences of this heat production, the typical approach has been to assume that other (fossil) fuels could be saved on a 1:1 basis (e.g. 1 GJ of waste heat delivered substitutes for 1 GJ of coal-based heat). This paper investigates consequences of waste-based heat substitution in two specific Danish district heating networks and the energy-associated interactions between the plants connected to these networks. Despite almost equal electricity and heat efficiencies at the waste incinerators connected to the two district heating networks, the energy and CO{sub 2} accounts showed significantly different results: waste incineration in one network caused a CO{sub 2} saving of 48 kg CO{sub 2}/GJ energy input while in the other network a load of 43 kg CO{sub 2}/GJ. This was caused mainly by differences in operation mode and fuel types of the other heat producing plants attached to the networks. The paper clearly indicates that simple evaluations of waste-to-energy efficiencies at the incinerator are insufficient for assessing the consequences of heat substitution in district heating network systems. The paper also shows that using national averages for heat substitution will not provide a correct answer: local conditions need to be addressed thoroughly otherwise we may fail to assess correctly the heat recovery from waste incineration.

Fruergaard, T.; Christensen, T.H. [Department of Environmental Engineering, Technical University of Denmark, Kongens Lyngby (Denmark); Astrup, T., E-mail: tha@env.dtu.d [Department of Environmental Engineering, Technical University of Denmark, Kongens Lyngby (Denmark)

2010-07-15T23:59:59.000Z

96

Simple models of district heating systems for load and demand side management  

E-Print Network [OSTI]

of Research, Development and Demonstration on District Heating and Cooling, including the integration of CHP, not mentioned here, supplied information in various ways. All help is very much appreciated. Lyngby, December

97

District heating from electric-generating plants and municipal incinerators: local planner's assessment guide  

SciTech Connect (OSTI)

This guide is designed to aid local government planners in the preliminary evaluation of the feasibility of district heating using heat recovered from electric generating plants and municipal incinerators. System feasibility is indicated by: (1) the existence of an adequate supply of nearby waste heat, (2) the presence of a sufficiently dense and large thermal load, and (3) a favorable cost comparison with conventional heating methods. 34 references.

Pferdehirt, W.; Kron, N. Jr.

1980-11-01T23:59:59.000Z

98

Biomass District Heat System for Interior Rural Alaska Villages  

SciTech Connect (OSTI)

Alaska Village Initiatives (AVI) from the outset of the project had a goal of developing an integrated village approach to biomass in Rural Alaskan villages. A successful biomass project had to be ecologically, socially/culturally and economically viable and sustainable. Although many agencies were supportive of biomass programs in villages none had the capacity to deal effectively with developing all of the tools necessary to build a complete integrated program. AVI had a sharp learning curve as well. By the end of the project with all the completed tasks, AVI developed the tools and understanding to connect all of the dots of an integrated village based program. These included initially developing a feasibility model that created the capacity to optimize a biomass system in a village. AVI intent was to develop all aspects or components of a fully integrated biomass program for a village. This meant understand the forest resource and developing a sustainable harvest system that included the right sized harvest equipment for the scale of the project. Developing a training program for harvesting and managing the forest for regeneration. Making sure the type, quality, and delivery system matched the needs of the type of boiler or boilers to be installed. AVI intended for each biomass program to be of the scale that would create jobs and a sustainable business.

Wall, William A.; Parker, Charles R.

2014-09-01T23:59:59.000Z

99

Woodfuel community heating at Kielder A wood-fired district heating  

E-Print Network [OSTI]

-built facility that holds up to 450 cubic metres of woodchips. A tractor and trailer transports four loads of woodchips weekly to the boiler house fuel store in the centre of the village. The delivery trailer has

100

BSU GHP District Heating and Cooling System (Phase I)  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

of Concept" completed * Borehole field designed using "Thermal Dynamics" software * Heat Pump Chiller requirements determined * Surveys conducted throughout campus to...

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Cedarville School District Retrofit of Heating and Cooling Systems with Geothermal Heat Pumpsand Ground Source Water Loops  

Broader source: Energy.gov [DOE]

Project objectives: Improve the indoor air quality and lower the cost of cooling and heating the buildings that make up the campus of Cedarville High School and Middle School.; Provide jobs; and reduce requirements of funds for the capital budget of the School District; and thus give relief to taxpayers in this rural region during a period of economic recession.

102

Cedarville School District Retrofit of Heating and Cooling Systems...  

Open Energy Info (EERE)

Cooling Systems with Geothermal Heat Pumps and Ground Source Water Loops Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Cedarville...

103

District Wide Geothermal Heating Conversion Blaine County School...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

will impact the geothermal energy development market by showing that ground source heat pump systems using production and re-injection wells has the lowest total cost of...

104

China Energy and Emissions Paths to 2030  

E-Print Network [OSTI]

2010 Technology Shares District Heating Boiler Gas BoilerReference Scenario District Heating Boiler Gas Boiler Smallwater generation for district heating, preheating combustion

Fridley, David

2012-01-01T23:59:59.000Z

105

Boiler System Efficiency Improves with Effective Water Treatment  

E-Print Network [OSTI]

Water treatment is an important aspect of boiler operation which can affect efficiency or result in damage if neglected. Without effective water treatment, scale can form on boiler tubes, reducing heat transfer, and causing a loss of boiler...

Bloom, D.

106

Geothermal energy and district heating in Ny-lesund, Svalbard .  

E-Print Network [OSTI]

??This thesis presents the possibilities for using shallow geothermal energy for heating purposes in Ny-lesund. The current energy supply in Ny-lesund is a diesel generator, (more)

Iversen, Julianne

2013-01-01T23:59:59.000Z

107

City of Allentown, assessment of a district heating system. Final report, 1981-1982  

SciTech Connect (OSTI)

The City of Allentown has designed a district heating system in three separate parts. Two of these will serve the central business district with high temperature hot water using natural gas as the fuel source. A large industrial area needing process steam will be served from another plant 50 MWe (37.5 MWt) cogenerating fluidized bed combustion units. It will occupy the site of a former waste incinerator and will use western Pennsylvania coal as fuel. The construction is phased to cover the period from 1983 to 1991, and is able to provide a substantial number of new jobs while reducing consumer costs for heat. Although a solid waste to energy incinerator at first seemed to be a good source of heat and an assist in waste disposal now using a remote location for sanitary land-fill, the idea was abandoned in the face of opposition to a perceived problem in air pollution from its emissions.

Oliker, I.; Tamayne, T.

1982-09-01T23:59:59.000Z

108

Condensing heat exchanger systems for residential/commercial furnaces and boilers. Phase IV  

SciTech Connect (OSTI)

The development of condensing heat exchanger systems is studied. In the work reported here, the focus is on the corrosion resistance of materials to condensate produced by gas-fired heating equipment, and the characterization of the spatial variation of condensation corrosivity in condensing heat exchangers.

Razgaitis, R.; Payer, J.H.; Talbert, S.G.; Hindin, B.; White, E.L.; Locklin, D.W.; Cudnik, R.A.; Stickford, G.H.

1985-10-01T23:59:59.000Z

109

Compliance testing of Grissom Air Force Base Central Heating Plant coal-fired boilers 3, 4, and 5, Grissom Air Force Base, Indiana. Final technical report, 3-21 Feb 92  

SciTech Connect (OSTI)

A source emission testing for particulate matter and visible emissions was conducted on coal-fired boilers at the Grissom AFB Central Heating Plant during 3-21 February 1992 by the Air Quality Function of Armstrong Laboratory. The survey was conducted to determine compliance with regard to Indiana Administration Code, Title 325 Pollution Control Board, Article 5, Opacity Regulations, and Article 6, Particulate Regulations. All boilers were tested through the bypass stack. Results indicated that boilers 3 and 4 met applicable, visible, and particulate matter emissions standards. Boiler 5 exceeded the particulate standard.

Cintron-Ocasio, R.A.

1992-06-01T23:59:59.000Z

110

Hydronic Heating Retrofits for Low-Rise Multifamily Buildings - Phase 1: Boiler Control Replacement and Monitoring  

SciTech Connect (OSTI)

The ARIES Collaborative, a Department of Energy Building America research team, partnered with NeighborWorks America affiliate Homeowners' Rehab Inc. (HRI) of Cambridge, MA to implement and study improvements to the heating system in one of the non-profit's housing developments. The heating control systems in the 42-unit Columbia CAST housing development were upgraded in an effort projected to reduce heating costs by 15 to 25 percent.

Dentz, J.; Henderson, H.

2012-04-01T23:59:59.000Z

111

Boiler Corrosion and Monitoring  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

Results of a collaborative effort to investigate and develop solutions for key material issues affecting the performance of large-scale coal-fired boilers operating at advanced conditions is presented. Advanced conditions include advanced steam temperatures, oxyfuel firing, and co-firing biomass materials. A series of laboratory experimental results are presented on fireside corrosion in environments representing air-, and oxy-fired conditions, and with coal and/or biomass as the fuel. The effects of fluctuating reducing atmospheres and heat flux effects were examined. A variety of boiler corrosion probes and sensors were developed and tested. The probes measured corrosion by section loss and the sensors by electrochemical techniques including electrochemical noise. The probes were tested in coal and waste-to-energy boilers. Correlations between section loss probes and electrochemical noise sensors allow for real-time corrosion rate measurements to be made that allow for changes in boiler operations to be tracked in terms of corrosion effects.

G. R. Holcomb; B. F. McGhee; A. T. Fry; N. J. Simms; K. Davis; Shim, H S; S. J. Bullard

2013-11-19T23:59:59.000Z

112

Assessment of district heating and cooling supply from Goudey Generating Station  

SciTech Connect (OSTI)

This paper addresses the feasibility analysis of retrofitting the New York State Electric and Gas (NYSEG) Goudey Generating Station for district heating and cooling supply to the SUNY-Binghamton Campus. The project involved detailed analysis of the power plant retrofit, dispatch analysis of the retrofitted Goudey Station in the New York Power Pool, environmental and permitting assessment, retrofit analysis of the SUNY campus to low temperature hot water and economic analysis.

McIntire, M.E.; Hall, D.; Beal, D.J. [New York State Electric & Gas Corporation, Binghamton, NY (United States)] [and others

1995-06-01T23:59:59.000Z

113

Comparison of heat pump system and boiler plant for one-family house : Heat sources in one-family house.  

E-Print Network [OSTI]

??The aim of this work is to look through, compare and choose the cheapest heat source for typical new Finnish one-family house. We will speak (more)

Kaydalova, Natalia

2010-01-01T23:59:59.000Z

114

Hydronic Heating Retrofits for Low-Rise Multifamily Buildings: Boiler Control Replacement and Monitoring  

SciTech Connect (OSTI)

The ARIES Collaborative, a U.S. Department of Energy Building America research team, partnered with NeighborWorks America affiliate Homeowners' Rehab Inc. of Cambridge, Massachusetts, to implement and study improvements to the central hydronic heating system in one of the nonprofit's housing developments. The heating control systems in the three-building, 42-unit Columbia Cambridge Alliance for Spanish Tenants housing development were upgraded.

Dentz, J.; Henderson, H.; Varshney, K.

2013-10-01T23:59:59.000Z

115

Fluid Bed Waste Heat Boiler Operating Experience in Dirty Gas Streams  

E-Print Network [OSTI]

on an aluminium melting furnace at the ALCOA Massena Integrated Aluminum Works in upstate New York. Waste heat from an aluminum melting furnace is captured for general plant use for the first time in this plant. It is accomplished with advanced fluid bed heat... recovery that typically can save energy equivalent to 40% of the furnace firing rate. Previous attempts to recovery energy conven tionally on this type of furnace were unsuccessful due to fouling. The resolution of this fouling problem by using...

Kreeger, A. H.

116

Guide to Combined Heat and Power Systems for Boiler Owners and Operators,  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Source Heat2 December 2006 DOEthe

117

Guide to Combined Heat and Power Systems for Boiler Owners and Operators  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensional Subject:Ground Source Heat2 December 2006 DOEthe Public15/2014

118

East Bank District Heating-to-Cooling Conversion Plan Check the date your building's cooling system is scheduled to be on.  

E-Print Network [OSTI]

East Bank District Heating-to-Cooling Conversion Plan Check the date your building's cooling system Coal Storage Building 39 NA Cooke Hall 56 Donhowe Building 044 East Gateway District Steam Distr. 199

Webb, Peter

119

Super Boiler 2nd Generation Technology for Watertube Boilers  

SciTech Connect (OSTI)

This report describes Phase I of a proposed two phase project to develop and demonstrate an advanced industrial watertube boiler system with the capability of reaching 94% (HHV) fuel-to-steam efficiency and emissions below 2 ppmv NOx, 2 ppmv CO, and 1 ppmv VOC on natural gas fuel. The boiler design would have the capability to produce >1500 F, >1500 psig superheated steam, burn multiple fuels, and will be 50% smaller/lighter than currently available watertube boilers of similar capacity. This project is built upon the successful Super Boiler project at GTI. In that project that employed a unique two-staged intercooled combustion system and an innovative heat recovery system to reduce NOx to below 5 ppmv and demonstrated fuel-to-steam efficiency of 94% (HHV). This project was carried out under the leadership of GTI with project partners Cleaver-Brooks, Inc., Nebraska Boiler, a Division of Cleaver-Brooks, and Media and Process Technology Inc., and project advisors Georgia Institute of Technology, Alstom Power Inc., Pacific Northwest National Laboratory and Oak Ridge National Laboratory. Phase I of efforts focused on developing 2nd generation boiler concepts and performance modeling; incorporating multi-fuel (natural gas and oil) capabilities; assessing heat recovery, heat transfer and steam superheating approaches; and developing the overall conceptual engineering boiler design. Based on our analysis, the 2nd generation Industrial Watertube Boiler when developed and commercialized, could potentially save 265 trillion Btu and $1.6 billion in fuel costs across U.S. industry through increased efficiency. Its ultra-clean combustion could eliminate 57,000 tons of NOx, 460,000 tons of CO, and 8.8 million tons of CO2 annually from the atmosphere. Reduction in boiler size will bring cost-effective package boilers into a size range previously dominated by more expensive field-erected boilers, benefiting manufacturers and end users through lower capital costs.

Mr. David Cygan; Dr. Joseph Rabovitser

2012-03-31T23:59:59.000Z

120

Assessment of district heating/cooling potential for the Frenchman's Cove redevelopment project. Final report  

SciTech Connect (OSTI)

A study undertaken to evaluate the potential for district heating/cooling (DHC) in the City of Ecorse, Michigan is documented. the purpose of the study was to assess the concept of delivering energy from a centralized source (or several sources) through a piping network to many end users for heating domestic (tap) hot water, space heating, and space cooling. The primary focus of the study was the proposed redevelopment of eighty acres in Ecorse along the Detroit River waterfront known as Frenchman's Cove. As planned, the complete development would place nearly 2 million square feet of new, mixed use structures/facilities on the site and an eighteen acre undeveloped island located 300 feet offshore. Other areas of the city were also examined to identify and evaluate existing supply and end use possibilities. In addition, several neighboring communities were examined to determine the feasibility of downriver DHC network. Six large thermal energy producers identified in the study area include the Detroit Edison River Rouge power plant (DECo.-RR), the Wyandotte Municipal Services Commission (WMSC) power plant, a BASF/Wyandotte Corporation plant, a Marathon Oil refinery, the Great Lakes Steel complex, and the E.C. Levy Company slag processing site. Each was examined for potential as a thermal supplier on a district heating network.

Not Available

1982-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Taking out 1 billion tons of CO2: The magic of China's 11th Five-Year Plan?  

E-Print Network [OSTI]

boiler boiler stove district heating heat pump conditionerSmall cogen Stove District heating Heat pump Centralized AC

Lin, Jiang

2008-01-01T23:59:59.000Z

122

EECBG Success Story: Biomass Boiler to Heat Oregon School | Department of  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat Pump Models |Conduct,Final9: DraftPlant,Community' | Department ofSensors

123

ITP Energy Intensive Processes: Improved Heat Recovery in Biomass-Fired Boilers  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe U.S. Department ofIOWA1999) | Department2009 | UC

124

The Reality and Future Scenarios of Commercial Building Energy Consumption in China  

E-Print Network [OSTI]

mostly attributed to district heating and coal boilers usedcities. In 2004, the District Heating has supplied about 25%Cogen Gas Boiler Boiler District Heating Fig.4 Space Cooling

Zhou, Nan

2008-01-01T23:59:59.000Z

125

Estimating Total Energy Consumption and Emissions of China's Commercial and Office Buildings  

E-Print Network [OSTI]

such as increasing boiler efficiency from 68% averageBuildings: Water Heating Efficiency Boiler Gas Boiler SmallSpace Heating Efficiency District Heating Boiler Gas Boiler

Fridley, David G.

2008-01-01T23:59:59.000Z

126

Recover Heat from Boiler Blowdown, Energy Tips: STEAM, Steam Tip Sheet #10 (Fact Sheet), Advanced Manufacturing Office (AMO), Energy Efficiency & Renewable Energy (EERE)  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L dDepartment ofList?Department09 Section 9990 Recover Heat from Boiler

127

Estimating Total Energy Consumption and Emissions of China's Commercial and Office Buildings  

E-Print Network [OSTI]

Small cogen Stove District heating Heat pump Central AC Roomin heat delivery (district heating), heat management (poorInstalled Capacity) District Heating Boiler Gas Boiler Small

Fridley, David G.

2008-01-01T23:59:59.000Z

128

Measurement of gas species, temperatures, coal burnout, and wall heat fluxes in a 200 MWe lignite-fired boiler with different overfire air damper openings  

SciTech Connect (OSTI)

Measurements were performed on a 200 MWe, wall-fired, lignite utility boiler. For different overfire air (OFA) damper openings, the gas temperature, gas species concentration, coal burnout, release rates of components (C, H, and N), furnace temperature, and heat flux and boiler efficiency were measured. Cold air experiments for a single burner were conducted in the laboratory. The double-swirl flow pulverized-coal burner has two ring recirculation zones starting in the secondary air region in the burner. As the secondary air flow increases, the axial velocity of air flow increases, the maxima of radial velocity, tangential velocity and turbulence intensity all increase, and the swirl intensity of air flow and the size of recirculation zones increase slightly. In the central region of the burner, as the OFA damper opening widens, the gas temperature and CO concentration increase, while the O{sub 2} concentration, NOx concentration, coal burnout, and release rates of components (C, H, and N) decrease, and coal particles ignite earlier. In the secondary air region of the burner, the O{sub 2} concentration, NOx concentration, coal burnout, and release rates of components (C, H, and N) decrease, and the gas temperature and CO concentration vary slightly. In the sidewall region, the gas temperature, O{sub 2} concentration, and NOx concentration decrease, while the CO concentration increases and the gas temperature varies slightly. The furnace temperature and heat flux in the main burning region decrease appreciably, but increase slightly in the burnout region. The NOx emission decreases from 1203.6 mg/m{sup 3} (6% O{sub 2}) for a damper opening of 0% to 511.7 mg/m{sup 3} (6% O{sub 2}) for a damper opening of 80% and the boiler efficiency decreases from 92.59 to 91.9%. 15 refs., 17 figs., 3 tabs.

Jianping Jing; Zhengqi Li; Guangkui Liu; Zhichao Chen; Chunlong Liu [Harbin Institute of Technology, Harbin (China). School of Energy Science and Engineering

2009-07-15T23:59:59.000Z

129

Modern Boiler Control and Why Digital Systems are Better  

E-Print Network [OSTI]

Steam generation in petrochemical plants and refineries is in a state of change. Expensive fuels have resulted in greater use of waste heat recovery boilers and other energy conservation measures. As a result, many conventional boilers have been...

Hughart, C. L.

1983-01-01T23:59:59.000Z

130

Energy Use in China: Sectoral Trends and Future Outlook  

E-Print Network [OSTI]

gas boiler boiler stove district heating heat pump airsmall cogen stove district heating heat pump Central AC Roomrespectively, followed by district heating of 22%, while in

2008-01-01T23:59:59.000Z

131

Validation/Uncertainty Quantification for Large Eddy Simulations of the heat flux in the Tangentially Fired Oxy-Coal Alstom Boiler Simulation Facility  

SciTech Connect (OSTI)

The objective of this task is to produce predictive capability with quantified uncertainty bounds for the heat flux in commercial-scale, tangentially fired, oxy-coal boilers. Validation data came from the Alstom Boiler Simulation Facility (BSF) for tangentially fired, oxy-coal operation. This task brings together experimental data collected under Alstoms DOE project for measuring oxy-firing performance parameters in the BSF with this University of Utah project for large eddy simulation (LES) and validation/uncertainty quantification (V/UQ). The Utah work includes V/UQ with measurements in the single-burner facility where advanced strategies for O2 injection can be more easily controlled and data more easily obtained. Highlights of the work include: Simulations of Alstoms 15 megawatt (MW) BSF, exploring the uncertainty in thermal boundary conditions. A V/UQ analysis showed consistency between experimental results and simulation results, identifying uncertainty bounds on the quantities of interest for this system (Subtask 9.1) A simulation study of the University of Utahs oxy-fuel combustor (OFC) focused on heat flux (Subtask 9.2). A V/UQ analysis was used to show consistency between experimental and simulation results. Measurement of heat flux and temperature with new optical diagnostic techniques and comparison with conventional measurements (Subtask 9.3). Various optical diagnostics systems were created to provide experimental data to the simulation team. The final configuration utilized a mid-wave infrared (MWIR) camera to measure heat flux and temperature, which was synchronized with a high-speed, visible camera to utilize two-color pyrometry to measure temperature and soot concentration. Collection of heat flux and temperature measurements in the University of Utahs OFC for use is subtasks 9.2 and 9.3 (Subtask 9.4). Several replicates were carried to better assess the experimental error. Experiments were specifically designed for the generation of high-fidelity data from a turbulent oxy-coal flame for the validation of oxy-coal simulation models. Experiments were also conducted on the OFC to determine heat flux profiles using advanced strategies for O2 injection. This is important when considering retrofit of advanced O2 injection in retrofit configurations.

Smith, P.J.; Eddings, E.G.; Ring, T.; Thornock, J.; Draper, T.; Isaac, B.; Rezeai, D.; Toth, P.; Wu, Y.; Kelly, K.

2014-08-01T23:59:59.000Z

132

Density-Enthalpy Phase Diagram 0D Boiler Simulation  

E-Print Network [OSTI]

Diagram 0D Boiler Simulation Finite Element Method Further Research Mass and Heat balances V d dt = i - eDensity-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research Finite Transitions #12;Density-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research

Vuik, Kees

133

Detection and location of leaks in district heating steam systems: Survey and review of current technology and practices  

SciTech Connect (OSTI)

This report presents the results of a survey undertaken to identify and characterize current practices for detecting and locating leaks in district heating systems, particular steam systems. Currently used technology and practices are reviewed. In addition, the survey was used to gather information that may be important for the application of acoustic leak detection. A few examples of attempts to locate leaks in steam and hot water pipes by correlation of acoustic signals generated by the leaks are also discussed.

Kupperman, D.S.; Raptis, A.C.; Lanham, R.N.

1992-03-01T23:59:59.000Z

134

Energy for 500 Million Homes: Drivers and Outlook for Residential Energy Consumption in China  

E-Print Network [OSTI]

gas boiler boiler stove district heating heat pump airrespectively, followed by district heating of 22%, while inaddition to the existing district heating system in northern

Zhou, Nan

2010-01-01T23:59:59.000Z

135

Current Status and Future Scenarios of Residential Building Energy Consumption in China  

E-Print Network [OSTI]

respectively, followed by district heating of 22%, while ingas boiler boiler stove district heating heat pump airsupplied through district heating system that does not have

Zhou, Nan

2010-01-01T23:59:59.000Z

136

How Can China Lighten Up? Urbanization, Industrialization and Energy Demand Scenarios  

E-Print Network [OSTI]

Warner, Sven. 2007. "District Heating Possibilities withinWarner, Sven. 2007. "District Heating Possibilities withingas boiler boiler stove district heating heat pump air

Aden, Nathaniel T.

2010-01-01T23:59:59.000Z

137

E-Print Network 3.0 - asm heat treating Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Example ASME code symbol stamps include S Power Boilers E Electric Boilers H Heating Boilers HLW Water... . Certification (American Society of Mechanical Engineers ASME...

138

District Energy Technologies | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

through the centralized system. District energy systems often operate with combined heat and power (CHP) and waste heat recovery technologies. Learn more about district...

139

Community Renewable Energy Success Stories Webinar: District...  

Broader source: Energy.gov (indexed) [DOE]

District Heating with Renewable Energy (text version) Community Renewable Energy Success Stories Webinar: District Heating with Renewable Energy (text version) Below is the text...

140

Dealing with big circulation flow, small temperature difference based on verified dynamic model simulations of a hot water district heating system  

E-Print Network [OSTI]

DEALING WITH BIG CIRCULATION FLOW RATE, SMALL TEMPERATURE DIFFERENCE BASED ON VERIFIED DYNAMIC MODEL SIMULATIONS OF A HOT WATER DISTRICT HEATING SYSTEM Li Lian Zhong, Senior Sales Consultant, Danfoss Automatic Controls Management (Shanghai...) Co.,Ltd, Anshan, China ABSTRACT Dynamic models of an indirect hot water district heating system were developed based on the first principle of thermodynamics. The ideal model was verified by using measured operational data. The ideal...

Zhong, L.

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Estimating Total Energy Consumption and Emissions of China's Commercial and Office Buildings  

E-Print Network [OSTI]

water heating Technologies Electric heater Gas boilerCoal Boiler Small cogen Stove District heating Heat pumpElectric water heater Gas boiler Coal Boiler Small cogen Oil

Fridley, David G.

2008-01-01T23:59:59.000Z

142

User manual for AQUASTOR: a computer model for cost analysis of aquifer thermal energy storage coupled with district heating or cooling systems. Volume I. Main text  

SciTech Connect (OSTI)

A computer model called AQUASTOR was developed for calculating the cost of district heating (cooling) using thermal energy supplied by an aquifer thermal energy storage (ATES) system. The AQUASTOR model can simulate ATES district heating systems using stored hot water or ATES district cooling systems using stored chilled water. AQUASTOR simulates the complete ATES district heating (cooling) system, which consists of two principal parts: the ATES supply system and the district heating (cooling) distribution system. The supply system submodel calculates the life-cycle cost of thermal energy supplied to the distribution system by simulating the technical design and cash flows for the exploration, development, and operation of the ATES supply system. The distribution system submodel calculates the life-cycle cost of heat (chill) delivered by the distribution system to the end-users by simulating the technical design and cash flows for the construction and operation of the distribution system. The model combines the technical characteristics of the supply system and the technical characteristics of the distribution system with financial and tax conditions for the entities operating the two systems into one techno-economic model. This provides the flexibility to individually or collectively evaluate the impact of different economic and technical parameters, assumptions, and uncertainties on the cost of providing district heating (cooling) with an ATES system. This volume contains the main text, including introduction, program description, input data instruction, a description of the output, and Appendix H, which contains the indices for supply input parameters, distribution input parameters, and AQUASTOR subroutines.

Huber, H.D.; Brown, D.R.; Reilly, R.W.

1982-04-01T23:59:59.000Z

143

ITP Energy Intensive Processes: Improved Heat Recovery in Biomass...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Improved Heat Recovery in Biomass-Fired Boilers ITP Energy Intensive Processes: Improved Heat Recovery in Biomass-Fired Boilers biomass-firedboilers.pdf More Documents &...

144

Combined Heat and Power (CHP) Integrated with Burners for Packaged...  

Broader source: Energy.gov (indexed) [DOE]

Combined Heat and Power (CHP) Integrated with Burners for Packaged Boilers Combined Heat and Power (CHP) Integrated with Burners for Packaged Boilers Providing Clean, Low-Cost,...

145

User manual for AQUASTOR: a computer model for cost analysis of aquifer thermal-energy storage oupled with district-heating or cooling systems. Volume II. Appendices  

SciTech Connect (OSTI)

A computer model called AQUASTOR was developed for calculating the cost of district heating (cooling) using thermal energy supplied by an aquifer thermal energy storage (ATES) system. the AQUASTOR Model can simulate ATES district heating systems using stored hot water or ATES district cooling systems using stored chilled water. AQUASTOR simulates the complete ATES district heating (cooling) system, which consists of two prinicpal parts: the ATES supply system and the district heating (cooling) distribution system. The supply system submodel calculates the life-cycle cost of thermal energy supplied to the distribution system by simulating the technical design and cash flows for the exploration, development, and operation of the ATES supply system. The distribution system submodel calculates the life-cycle cost of heat (chill) delivered by the distribution system to the end-users by simulating the technical design and cash flows for the construction and operation of the distribution system. The model combines the technical characteristics of the supply system and the technical characteristics of the distribution system with financial and tax conditions for the entities operating the two systems into one techno-economic model. This provides the flexibility to individually or collectively evaluate the impact of different economic and technical parameters, assumptions, and uncertainties on the cost of providing district heating (cooling) with an ATES system. This volume contains all the appendices, including supply and distribution system cost equations and models, descriptions of predefined residential districts, key equations for the cooling degree-hour methodology, a listing of the sample case output, and appendix H, which contains the indices for supply input parameters, distribution input parameters, and AQUASTOR subroutines.

Huber, H.D.; Brown, D.R.; Reilly, R.W.

1982-04-01T23:59:59.000Z

146

Proceedings: International Conference on Boiler Tube Failures and Heat Recovery Steam Generator (HRSG) Tube Failures and Inspections  

SciTech Connect (OSTI)

Tube failures remain the leading cause of availability loss in conventional fossil plants and combined cycle/heat recovery steam generator (HRSG) plants. These conference proceedings address state-of-the-art practices and techniques worldwide for understanding and reducing tube failures.

None

2002-10-01T23:59:59.000Z

147

How to Evaluate Low Excess Air Controls for Packaged Boilers  

E-Print Network [OSTI]

characteristics within your boiler so that a reliable estimate of the efficiency gain from LEA firing can be determined. Recall that heat transfer takes place in three main areas of the boiler-the radiant section, convection bank, and heat recovery equipment...

Londerville, S. B.; Kerler, W. J.

1984-01-01T23:59:59.000Z

148

Evaluation of the District of Columbia Energy Office Residential Conservation Assistance Program for Natural Gas-Heated Single-Family Homes  

SciTech Connect (OSTI)

At the request of the U.S. Department of Energy (DOE), Oak Ridge National Laboratory (ORNL), with assistance from the District of Columbia Energy Office (DCEO) performed an evaluation of part of the DCEO Residential Conservation Assistance Program (RCAP). The primary objective of the evaluation was to evaluate the effectiveness of the DCEO weatherization program. Because Weatherization Assistance Program (WAP) funds are used primarily for weatherization of single-family homes and because evaluating the performance of multi-family residences would be more complex than the project budget would support, ORNL and DCEO focused the study on gas-heated single-family homes. DCEO provided treatment information and arranged for the gas utility to provide billing data for 100 treatment houses and 434 control houses. The Princeton Scorkeeping Method (PRISM) software package was used to normalize energy use for standard weather conditions. The houses of the initial treatment group of 100 houses received over 450 measures costing a little over $180,000, including labor and materials. The average cost per house was $1,811 and the median cost per house was $1,674. Window replacement was the most common measure and accounted for about 35% of total expenditures. Ceiling and floor insulation was installed in 61 houses and accounts for almost 22% of the expenditures. Twenty-seven houses received replacement doors at an average cost of $620 per house. Eight houses received furnace or boiler replacements at an average cost of about $3,000 per house. The control-adjusted average measured savings are about 20 therms/year. The 95% confidence interval is approximately +20 to +60 therms/year. The average pre-weatherization energy consumption of the houses was about 1,100 therm/year. Consequently, the adjusted average savings is approximately 2% ({+-}4%)-not significantly different than zero. Most RCAP expenditures appear to go to repairs. While some repairs may have energy benefits, measures selected to meet repair needs generally have smaller energy benefits per unit cost than measures selected for energy conservation purposes. To the extent that extensive repairs are necessary or desirable, expectations of energy savings need to be adjusted. Since 2002, the DCEO has implemented a number of program improvements it believes enhance program performance. In 2003, DCEO published formal guidance for weatherization in RCAP (DCEO 2003). Consequently, the results of this study may not adequately represent the current performance of the program. DCEO should re-examine current RCAP weatherization patterns and energy savings to assess the effects of program changes.

McCold, Lance Neil [ORNL; Schmoyer, Richard L [ORNL

2007-03-01T23:59:59.000Z

149

Energy for 500 Million Homes: Drivers and Outlook for Residential Energy Consumption in China  

E-Print Network [OSTI]

Heat Pump Air Conditioner District Heating Boiler Gas Boiler Electricity Figure 11 Space Heating Technology Shift in Residential

Zhou, Nan

2010-01-01T23:59:59.000Z

150

Recovery Boiler Corrosion Chemistry  

E-Print Network [OSTI]

11/13/2014 1 Recovery Boiler Corrosion Chemistry Sandy Sharp and Honghi Tran Symposium on Corrosion of a recovery boiler each cause their own forms of corrosion and cracking Understanding the origin of the corrosive conditions enables us to operate a boiler so as to minimize corrosion and cracking select

Das, Suman

151

How Can China Lighten Up? Urbanization, Industrialization and Energy Demand Scenarios  

E-Print Network [OSTI]

Heating Efficiency Efficiency Boiler Small Cogen ElectricHeating Technologies and Efficiency District Heating BoilerBoiler Small Cogen Electric Heater Stove Heat Pump Efficiency

Aden, Nathaniel T.

2010-01-01T23:59:59.000Z

152

Remaining-life estimation of boiler pressure parts: Volume 4, Metallographic models for weld-heat-affected zone  

SciTech Connect (OSTI)

A comprehensive program of interrupted and creep rupture tests were performed on two heats of 1Cr-1/2Mo steel in a simulated coarse-grained HAZ condition at temperatures in the range 535-635{degree}C using both uniaxial and biaxial (torsion) stress states in order to produce specimens with varying degrees of creep damage. Based on studies of creep cavitation in these 1Cr-1/2Mo steel HAZ specimens, a quantitative metallographic parameter, A', was developed which describes the state of cavitation damage. The A' parameter is defined as the number fraction of grain boundaries having visible cavitation (OLM in the range of 400X to 500X) measured in traverses parallel to the maximum principal stress axis. The accumulation of creep damage as measured by the A' parameter was shown to be independent of stress state and, within the normal ranges of etching, insensitive to etch contrast since cavities need simply to be resolved. Thus, it is ideally suited to field measurements of service induced damage in plant components. Recommended metallographic preparation, replication and A' parameter measurement procedures are described. 56 refs., 70 figs., 17 tabs.

Ellis, F.V.; Henry, J.F.; Shammas, M.S. (Combustion Engineering, Inc., Chattanooga, TN (USA); Central Electricity Research Labs., Leatherhead (UK))

1989-11-01T23:59:59.000Z

153

Parametric study of a firetube boiler performance  

SciTech Connect (OSTI)

Critical areas in the design of commercial and industrial firetube boilers are burner and furnace configuration, as is the resultant heat transfer from the furnace wall to the water under the various conditions. Furthermore, performance of industrial and commercial boilers is mainly dependent upon their material and geometrical dimensions. In order to investigate boiler performance globally, a relatively simple model which can be processed in a personal computer (PC) is proposed. In this paper, the effects of thermo-physical parameters on the energy and exergy performance of a firetube boiler are studied by using a simple model for the combustion product gas behavior through the boiler passes. For each steady-state condition, the boiler performance is investigated by parametrically changing the degree of inception of nucleate boiling, the tube wall emissivity, the saturation steam pressure, and the fraction of flue gas recirculation (FGR, utilized for NO{sub x} emissions reduction). Results for a set of parameters such as those considered in this work may be used in future firetube boiler design to improve performance and reduce manufacturing costs.

Park, H. [Marquette Univ., Milwaukee, WI (United States). Dept. of Mechanical and Industrial Engineering; Valentino, M.W. [Cleaver-Brooks, Milwaukee, WI (United States)

1995-12-31T23:59:59.000Z

154

Boiler MACT 35000FT: Maximum Achievable Control Technology  

E-Print Network [OSTI]

fossil fuel is coal, petroleum coke, tire derived fuel, etc. ESL-IE-13-05-29 Proceedings of the Thrity-Fifth Industrial Energy Technology Conference New Orleans, LA. May 21-24, 2013 Classification-Boiler Subcategory Boiler Classification Pulverized... Heaters Affected ? Large affected units burning coal, oil, biomass, natural gas, other solid, liquid, gaseous non-waste materials ? Boilers or Process Heaters Not Affected ? Electric Utility Generating Unit (EGU) ?Waste Heat, hot water heaters...

Robinson, J.

2013-01-01T23:59:59.000Z

155

Application of Boiler Op for combustion optimization at PEPCO  

SciTech Connect (OSTI)

Title IV requires the reduction of NOx at all stations within the PEPCO system. To assist PEPCO plant personnel in achieving low heat rates while meeting NOx targets, Lehigh University`s Energy Research Center and PEPCO developed a new combustion optimization software package called Boiler Op. The Boiler Op code contains an expert system, neural networks and an optimization algorithm. The expert system guides the plant engineer through a series of parametric boiler tests, required for the development of a comprehensive boiler database. The data are then analyzed by the neural networks and optimization algorithm to provide results on the boiler control settings which result in the best possible heat rate at a target NOx level or produce minimum NOx. Boiler Op has been used at both Potomac River and Morgantown Stations to help PEPCO engineers optimize combustion. With the use of Boiler Op, Morgantown Station operates under low NOx restrictions and continues to achieve record heat rate values, similar to pre-retrofit conditions. Potomac River Station achieves the regulatory NOx limit through the use of Boiler Op recommended control settings and without NOx burners. Importantly, any software like Boiler Op cannot be used alone. Its application must be in concert with human intelligence to ensure unit safety, reliability and accurate data collection.

Maines, P.; Williams, S. [Potomac Electric Power Co., Upper Marlsboro, MD (United States); Levy, E. [Lehigh Univ., Bethlehem, PA (United States). Energy Research Center

1997-09-01T23:59:59.000Z

156

User manual for GEOCITY: a computer model for cost analysis of geothermal district-heating-and-cooling systems. Volume II. Appendices  

SciTech Connect (OSTI)

The purpose of this model is to calculate the costs of residential space heating, space cooling, and sanitary water heating or process heating (cooling) using geothermal energy from a hydrothermal reservoir. The model can calculate geothermal heating and cooling costs for residential developments, a multi-district city, or a point demand such as an industrial factory or commercial building. Volume II contains all the appendices, including cost equations and models for the reservoir and fluid transmission system and the distribution system, descriptions of predefined residential district types for the distribution system, key equations for the cooling degree hour methodology, and a listing of the sample case output. Both volumes include the complete table of contents and lists of figures and tables. In addition, both volumes include the indices for the input parameters and subroutines defined in the user manual.

Huber, H.D.; Fassbender, L.L.; Bloomster, C.H.

1982-09-01T23:59:59.000Z

157

District heating and cooling systems for communities through power plant retrofit distribution network. Phase 2. Final report, March 1, 1980-January 31, 1984. Volume IV  

SciTech Connect (OSTI)

This volume contains the following: discussion of cost estimating methodology, detailed cost estimates of Hudson No. 2 retrofit, intermediate thermal plant (Kearny No. 12) and local heater plants; transmission and distribution cost estimate; landfill gas cost estimate; staged development scenarios; economic evaluation; fuel use impact; air quality impact; and alternatives to district heating.

Not Available

1984-01-31T23:59:59.000Z

158

Preliminary Retro-Commissioning Study on Optimal Operation for the Heat Source System of a District Heating Cooling Plant  

E-Print Network [OSTI]

Heating Water Suuply Chilled Water Return Heating Water Return To User New System ESL-IC-08-10-57 Proceedings of the Eighth International Conference for Enhanced Building Operations, Berlin, Germany, October 20-22, 2008 2 attract attention due..., R6 450 1, 1 ESL-IC-08-10-57 Proceedings of the Eighth International Conference for Enhanced Building Operations, Berlin, Germany, October 20-22, 2008 3 (one office building and one building with hotel rooms and leisure facilities) since November...

Shingu, H.; Yoshida, H.; Wang, F.; Ono, E.

159

Super Boiler: Packed Media/Transport Membrane Boiler Development and Demonstration  

SciTech Connect (OSTI)

Gas Technology Institute (GTI) and Cleaver-Brooks developed a new gas-fired steam generation system???¢????????the Super Boiler???¢????????for increased energy efficiency, reduced equipment size, and reduced emissions. The system consists of a firetube boiler with a unique staged furnace design, a two-stage burner system with engineered internal recirculation and inter-stage cooling integral to the boiler, unique convective pass design with extended internal surfaces for enhanced heat transfer, and a novel integrated heat recovery system to extract maximum energy from the flue gas. With these combined innovations, the Super Boiler technical goals were set at 94% HHV fuel efficiency, operation on natural gas with <5 ppmv NOx (referenced to 3%O2), and 50% smaller than conventional boilers of similar steam output. To demonstrate these technical goals, the project culminated in the industrial demonstration of this new high-efficiency technology on a 300 HP boiler at Clement Pappas, a juice bottler located in Ontario, California. The Super Boiler combustion system is based on two stage combustion which combines air staging, internal flue gas recirculation, inter-stage cooling, and unique fuel-air mixing technology to achieve low emissions rather than external flue gas recirculation which is most commonly used today. The two-stage combustion provides lower emissions because of the integrated design of the boiler and combustion system which permit precise control of peak flame temperatures in both primary and secondary stages of combustion. To reduce equipment size, the Super Boiler's dual furnace design increases radiant heat transfer to the furnace walls, allowing shorter overall furnace length, and also employs convective tubes with extended surfaces that increase heat transfer by up to 18-fold compared to conventional bare tubes. In this way, a two-pass boiler can achieve the same efficiency as a traditional three or four-pass firetube boiler design. The Super Boiler is consequently up to 50% smaller in footprint, has a smaller diameter, and is up to 50% lower in weight, resulting in very compact design with reduced material cost and labor costs, while requiring less boiler room floor space. For enhanced energy efficiency, the heat recovery system uses a transport membrane condenser (TMC), a humidifying air heater (HAH), and a split-stage economizer to extract maximum energy from the flue gas. The TMC is a new innovation that pulls a major portion of water vapor produced by the combustion process from the flue gases along with its sensible and latent heat. This results in nearly 100% transfer of heat to the boiler feed water. The HAH improves the effectiveness of the TMC, particularly in steam systems that do not have a large amount of cold makeup water. In addition, the HAH humidifies the combustion air to reduce NOx formation. The split-stage economizer preheats boiler feed water in the same way as a conventional economizer, but extracts more heat by working in tandem with the TMC and HAH to reduce flue gas temperature. These components are designed to work synergistically to achieve energy efficiencies of 92-94% which is 10-15% higher than today???¢????????s typical firetube boilers.

Liss, William E; Cygan, David F

2013-04-17T23:59:59.000Z

160

Exploration and drilling for geothermal heat in the Capital District, New York. Volume 4. Final report  

SciTech Connect (OSTI)

The Capital District area of New York was explored to determine the nature of a hydrothermal geothermal system. The chemistry of subsurface water and gas, the variation in gravity, magnetism, seismicity, and temperature gradients were determined. Water and gas analyses and temperature gradient measurements indicate the existence of a geothermal system located under an area from Ballston Spa, southward to Altamont, and eastward toward Albany. Gravimetric and magnetic surveys provided little useful data but microseismic activity in the Altamont area may be significant. Eight wells about 400 feet deep, one 600 feet and one 2232 feet were drilled and tested for geothermal potential. The highest temperature gradients, most unusual water chemistries, and greatest carbon dioxide exhalations were observed in the vicinity of the Saratoga and McGregor faults between Saratoga Springs and Schenectady, New York, suggesting some fault control over the geothermal system. Depths to the warm fluids within the system range from 500 meters (Ballston Spa) to 2 kilometers (Albany).

Not Available

1983-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Exploration and drilling for geothermal heat in the Capital District, New York. Final report  

SciTech Connect (OSTI)

The Capital District area of New York was explored to determine the nature of a hydrothermal geothermal system. The chemistry of subsurface water and gas, the variation in gravity, magnetism, seismicity, and temperature gradients were determined. Water and gas analyses and temperature gradient measurements indicate the existence of a geothermal system located under an area from Ballston Spa, southward to Altamont, and eastware toward Albany. Gravimetric and magnetic surveys provided little useful data but microseismic activity in the Altamont area may be significant. Eight wells about 400 feet deep, one 600 feet and one 2232 feet were drilled and tested for geothermal potential. The highest temperature gradients, most unusual water chemistries, and greatest carbon dioxide exhalations were observed in the vicinity of the Saratoga and McGregor faults between Saratoga Springs and Schenectady, New York, suggesting some fault control over the geothermal system. Depths to the warm fluids within the system range from 500 meters (Ballston Spa) to 2 kilometers (Albany).

Not Available

1983-08-01T23:59:59.000Z

162

Recovery Boiler Modeling  

E-Print Network [OSTI]

, east, e, west, w, bot tom, b, and top, t, neighbors. The neighboring cou pling coefficients (an, a., .. , etc) express the magnitudes of the convection and diffusion which occur across the control volume boundaries. The variable b p represents... represents a model of one half of the recovery boiler. The boiler has three air levels. The North, South and East boundaries of the computational domain represent the water walls of the boiler. The West boundary represents a symmetry plane. It should...

Abdullah, Z.; Salcudean, M.; Nowak, P.

163

Minimize Boiler Blowdown  

SciTech Connect (OSTI)

This revised ITP tip sheet on minimizing boiler blowdown provides how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

Not Available

2006-01-01T23:59:59.000Z

164

Field Test of Boiler Primary Loop Temperature Controller  

SciTech Connect (OSTI)

Beyond these initial system efficiency upgrades are an emerging class of Advanced Load Monitoring (ALM) aftermarket controllers that dynamically respond to the boiler load, with claims of 10% to 30% of fuel savings over a heating season. For hydronic boilers specifically, these devices perform load monitoring, with continuous measurement of supply and in some cases return water temperatures. Energy savings from these ALM controllers are derived from dynamic management of the boiler differential, where a microprocessor with memory of past boiler cycles prevents the boiler from firing for a period of time, to limit cycling losses and inefficient operation during perceived low load conditions. These differ from OTR controllers, which vary boiler setpoint temperatures with ambient conditions while maintaining a fixed differential. PARR installed and monitored the performance of one type of ALM controller, the M2G from Greffen Systems, at multifamily sites in the city of Chicago and its suburb Cary, IL, both with existing OTR control. Results show that energy savings depend on the degree to which boilers are over-sized for their load, represented by cycling rates. Also savings vary over the heating season with cycling rates, with greater savings observed in shoulder months. Over the monitoring period, over-sized boilers at one site showed reductions in cycling and energy consumption in line with prior laboratory studies, while less over-sized boilers at another site showed muted savings.

Glanville, P.; Rowley, P.; Schroeder, D.; Brand, L.

2014-09-01T23:59:59.000Z

165

Direct contact, binary fluid geothermal boiler  

DOE Patents [OSTI]

Energy is extracted from geothermal brines by direct contact with a working fluid such as isobutane which is immiscible with the brine in a geothermal boiler. The geothermal boiler provides a distributor arrangement which efficiently contacts geothermal brine with the isobutane in order to prevent the entrainment of geothermal brine in the isobutane vapor which is directed to a turbine. Accordingly the problem of brine carry-over through the turbine causes corrosion and scaling thereof is eliminated. Additionally the heat exchanger includes straightening vanes for preventing startup and other temporary fluctuations in the transitional zone of the boiler from causing brine carryover into the turbine. Also a screen is provided in the heat exchanger to coalesce the working fluid and to assist in defining the location of the transitional zone where the geothermal brine and the isobutane are initially mixed.

Rapier, Pascal M. (Richmond, CA)

1982-01-01T23:59:59.000Z

166

Boiler Upgrades and Decentralizing Steam Systems Save Water and...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

replacing its central plant with a combination of distributed boilers and ground source heat pumps. The results saved more than 1 million MBtu in energy and 19,574 Kgal of water...

167

Best Management Practice #8: Steam Boiler Systems  

Broader source: Energy.gov [DOE]

Boilers and steam generators are commonly used in large heating systems, institutional kitchens, or in facilities where large amounts of process steam are used. This equipment consumes varying amounts of water depending on system size, the amount of steam used, and the amount of condensate returned.

168

Evaluation of coal-derived liquids as boiler fuels. Volume 2: boiler test results. Final report  

SciTech Connect (OSTI)

A combustion demonstration using six coal-derived liquid (CDL) fuels was conducted on a utility boiler located at the Plant Sweatt Electric Generating Station of Mississippi Power Company in Meridian, Mississippi. The test program was conducted in two phases. The first phase included the combustion tests of the two conventional fuels (natural gas and No. 6 fuel oil) and three coal-derived liquid fuels (Solvent Refined Coal-II full range distillate, H-Coal heavy distillate and H-Coal blended distillate). The second phase involved the evaluation of three additional CDL fuels (H-Coal light distillate, Exxon Donor Solvent full range distillate and Solvent Refined Coal-II middle distillate). The test boiler was a front wall-fired Babcock and Wilcox unit with a rated steam flow of 425,000 lb/h and a generating capacity of 40 MW. Boiler performance and emissions were evaluated with baseline and CDL fuels at 15, 25, 40 MW loads and at various excess air levels. Low NO/sub x/ (staged) combustion techniques were also implemented. Boiler performance monitoring included measurements for fuel steam and flue gas flow, pressure, temperature, and heat absorption, resulting in a calculated combustion efficiency, boiler efficiency, and heat rate. Emissions measurements included oxygen, carbon dioxide, carbon monoxide, oxides of nitrogen, sulfur dioxide, sulfur trioxide, acid dewpoint, particulate mass, size distribution and morphology, chlorides, and opacity. The test program demonstrated the general suitability of CDL fuels for use in existing oil-fired utility boilers. No significant boiler tube surface modifications will be required. The CDL fuels could be handled similarly to No. 2 oil with appropriate safety procedures and materials compatibility considerations. Volume 2 of a five-volume report contains the detailed boiler test results. 96 figs., 26 tabs.

Not Available

1985-09-01T23:59:59.000Z

169

What is District Energy and How Does it Work? District Energy (DE) systems use hot water or  

E-Print Network [OSTI]

wood used to supply a small district heating plant. The heating plant can be configured to use woody rapeseed oil is used. The district heating grid has a length of 3.3 miles, and the heat delivery is around

170

Climate Wise Boiler and Steam Efficiency Wise Rules  

E-Print Network [OSTI]

(and excess oxygen, 02), boiler tube cleaning, and re-calibration of boiler controls. ? A good tune-up with preclSlon testing equipment can detect and correct excess air losses, smoking, unbumed fuel losses, sooting, and high stack temperatures... control 7. Utilize characterizable fuel valve 8. Convert to atomizing burners Stack Losses and Waste Heat Recovery 9. Reduce net stack temperature by 40 of 10. Utilize stack dampers II. Direct contact condensation heat recovery 12. Pre...

Milmoe, P. H.; Winkelman, S. R.

171

Boiler MACT Technical Assistance (Fact Sheet)  

SciTech Connect (OSTI)

Fact sheet describing the changes to Environmental Protection Act process standards. The DOE will offer technical assistance to ensure that major sources burning coal and oil have information on cost-effective, clean energy strategies for compliance, and to promote cleaner, more efficient boiler burning to cut harmful pollution and reduce operational costs. The U.S. Environmental Protection Agency (EPA) is expected to finalize the reconsideration process for its Clean Air Act pollution standards National Emissions Standards for Hazardous Air Pollutants for Major Sources: Industrial, Commercial, and Institutional Boilers and Process Heaters (known as Boiler Maximum Achievable Control Technology (MACT)), in Spring 2012. This rule applies to large and small boilers in a wide range of industrial facilities and institutions. The U.S. Department of Energy (DOE) will offer technical assistance to ensure that major sources burning coal or oil have information on cost-effective clean energy strategies for compliance, including combined heat and power, and to promote cleaner, more efficient boilers to cut harmful pollution and reduce operational costs.

Not Available

2012-03-01T23:59:59.000Z

172

Energy Use in China: Sectoral Trends and Future Outlook  

E-Print Network [OSTI]

Efficiency) Scenario: Ref Region: All Regions Boiler GasEfficiencies End Use Technology District Heating Boiler GasCogen Boiler Stove Heat Pump Figure 48 Example of Efficiency

2008-01-01T23:59:59.000Z

173

RESIDENTIAL THERMOSTATS: COMFORT CONTROLS IN CALIFORNIA HOMES  

E-Print Network [OSTI]

on boilers, hot water, district heating, spot heating, andwood to charcoal to district heating. www.tecsoc.org/pubs/pellets) or via district heating systems. Air conditioning

Meier, Alan K.

2008-01-01T23:59:59.000Z

174

User manual for GEOCITY: a computer model for cost analysis of geothermal district-heating-and-cooling systems. Volume I. Main text  

SciTech Connect (OSTI)

The purpose of this model is to calculate the costs of residential space heating, space cooling, and sanitary water heating or process heating (cooling) using geothermal energy from a hydrothermal reservoir. The model can calculate geothermal heating and cooling costs for residential developments, a multi-district city, or a point demand such as an industrial factory or commercial building. GEOCITY simulates the complete geothermal heating and cooling system, which consists of two principal parts: the reservoir and fluid transmission system and the distribution system. The reservoir and fluid transmission submodel calculates the life-cycle cost of thermal energy supplied to the distribution system by simulating the technical design and cash flows for the exploration, development, and operation of the reservoir and fluid transmission system. The distribution system submodel calculates the life-cycle cost of heat (chill) delivered by the distribution system to the end-users by simulating the technical design and cash flows for the construction and operation of the distribution system. Geothermal space heating is assumed to be provided by circulating hot water through radiators, convectors, fan-coil units, or other in-house heating systems. Geothermal process heating is provided by directly using the hot water or by circulating it through a process heat exchanger. Geothermal space or process cooling is simulated by circulating hot water through lithium bromide/water absorption chillers located at each building. Retrofit costs for both heating and cooling applications can be input by the user. The life-cycle cost of thermal energy from the reservoir and fluid transmission system to the distribution system and the life-cycle cost of heat (chill) to the end-users are calculated using discounted cash flow analysis.

Huber, H.D.; Fassbender, L.L.; Bloomster, C.H.

1982-09-01T23:59:59.000Z

175

DistrictHeating Nuevasaladecalderasydistribucin  

E-Print Network [OSTI]

­ EMISIONES SOx=0% - BAJA EMISI?N NOx y ahorro de emisiones de 202 Ton CO2/año. - Mejora paisajística del

Fraguela, Basilio B.

176

Dissimilar-metal weld failures in boiler tubing  

SciTech Connect (OSTI)

Both ferritic heat-resisting steels and austenitic stainless steels are used for fossil-fired boilers for central power stations. The use of these two different types of materials within the system leads to the need for a dissimilar-metal weld transition joint. Increased cyclic operation of boilers has led to a rash of failures in welds between dissimilar metals; studies have identified the causes, and improved nondestructive testing techniques permit early identification of problem areas.

Klueh, R.L.

1984-02-01T23:59:59.000Z

177

District heating and cooling systems for communities through power plant retrofit distribution network, Phase 2. Final report, March 1, 1980-January 31, 1984. Volume 5, Appendix A  

SciTech Connect (OSTI)

This volume contains the backup data for the portion of the load and service assessment in Section 2, Volume II of this report. This includes: locations of industrial and commercial establishments, locations of high rise buildings, data from the Newark (Essex County) Directory of Business, data from the Hudson County Industrial Directory, data from the N. J. Department of Energy Inventory of Public Buildings, data on commercial and industrial establishments and new developments in the Hackensack Meadowlands, data on urban redevelopment and Operation Breakthrough, and list of streets in the potential district heating areas of Newark/Harrison and Jersey City/Hoboken.

Not Available

1984-01-31T23:59:59.000Z

178

Study on Performance Verification and Evaluation of District Heating and Cooling System Using Thermal Energy of River Water  

E-Print Network [OSTI]

source and cooling water overall (in comparison with normal system 15% of energy saving) -Adopt large-scale ice heat storage system and realize equalization of electricity load -Adopt turbo chiller and heat recovery facilities as high efficiency heat... screw heat pump - 838MJ/? 1 IHP/Water source screw heat pump (Ice storage and heat recovery) Cool water? 3,080MJ/h Ice Storage? 1,936MJ/h Cool water heat recovery? 3,606MJ/h Ice storage heat recovery? 2,448MJ/h 8Unit ?16? TR1 Water cooling turbo...

Takahashi,N.; Niwa, H.; Kawano,M.; Koike,K.; Koga,O.; Ichitani, K.; Mishima,N.

2014-01-01T23:59:59.000Z

179

Loads Providing Ancillary Services: Review of International Experience-- Technical Appendix: Market Descriptions  

E-Print Network [OSTI]

electric boilers of district heating systems) must shedcapabilities 42 of the district heating systems not allgreater than 5 MW) district heating schemes can quickly

Grayson Heffner, Charles Goldman, Kintner-Meyer, M; Kirby, Brendan

2007-01-01T23:59:59.000Z

180

Energy Use in China: Sectoral Trends and Future Outlook  

E-Print Network [OSTI]

Geothermal Heat Pump Central AC by NG electric water heaterwater heating Technologies Electric heater gas boiler boiler small cogen stove district heating heat pump

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Recovery of Water from Boiler Flue Gas  

SciTech Connect (OSTI)

This project dealt with use of condensing heat exchangers to recover water vapor from flue gas at coal-fired power plants. Pilot-scale heat transfer tests were performed to determine the relationship between flue gas moisture concentration, heat exchanger design and operating conditions, and water vapor condensation rate. The tests also determined the extent to which the condensation processes for water and acid vapors in flue gas can be made to occur separately in different heat transfer sections. The results showed flue gas water vapor condensed in the low temperature region of the heat exchanger system, with water capture efficiencies depending strongly on flue gas moisture content, cooling water inlet temperature, heat exchanger design and flue gas and cooling water flow rates. Sulfuric acid vapor condensed in both the high temperature and low temperature regions of the heat transfer apparatus, while hydrochloric and nitric acid vapors condensed with the water vapor in the low temperature region. Measurements made of flue gas mercury concentrations upstream and downstream of the heat exchangers showed a significant reduction in flue gas mercury concentration within the heat exchangers. A theoretical heat and mass transfer model was developed for predicting rates of heat transfer and water vapor condensation and comparisons were made with pilot scale measurements. Analyses were also carried out to estimate how much flue gas moisture it would be practical to recover from boiler flue gas and the magnitude of the heat rate improvements which could be made by recovering sensible and latent heat from flue gas.

Edward Levy; Harun Bilirgen; Kwangkook Jeong; Michael Kessen; Christopher Samuelson; Christopher Whitcombe

2008-09-30T23:59:59.000Z

182

Postcombustion and its influences in 135 MWe CFB boilers  

SciTech Connect (OSTI)

In the cyclone of a circulating fluidized bed (CFB) boiler, a noticeable increment of flue gas temperature, caused by combustion of combustible gas and unburnt carbon content, is often found. Such phenomenon is defined as post combustion, and it could introduce overheating of reheated and superheated steam and extra heat loss of exhaust flue gas. In this paper, mathematical modeling and field measurements on post combustion in 135MWe commercial CFB boilers were conducted. A novel one-dimensional combustion model taking post combustion into account was developed. With this model, the overall combustion performance, including size distribution of various ashes, temperature profile, and carbon content profiles along the furnace height, heat release fraction in the cyclone and furnace were predicted. Field measurements were conducted by sampling gas and solid at different positions in the boiler under different loads. The measured data and corresponding model-calculated results were compared. Both prediction and field measurements showed post combustion introduced a temperature increment of flue gas in the cyclone of the 135MWe CFB boiler in the range of 20-50{sup o}C when a low-volatile bituminous coal was fired. Although it had little influence on ash size distribution, post combustion had a remarkable influence on the carbon content profile and temperature profile in the furnace. Moreover, it introduced about 4-7% heat release in the cyclone over the total heat release in the boiler. This fraction slightly increased with total air flow rate and boiler load. Model calculations were also conducted on other two 135MWe CFB boilers burning lignite and anthracite coal, respectively. The results confirmed that post combustion was sensitive to coal type and became more severe as the volatile content of the coal decreased. 15 refs., 11 figs., 4 tabs.

Shaohua Li; Hairui Yang; Hai Zhang; Qing Liu; Junfu Lu; Guangxi Yue [Tsinghua University, Beijing (China). Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering

2009-09-15T23:59:59.000Z

183

Improve Your Boiler's Combustion Efficiency  

SciTech Connect (OSTI)

This revised ITP tip sheet on boiler combustion efficiency provides how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

Not Available

2006-01-01T23:59:59.000Z

184

Return Condensate to the Boiler  

SciTech Connect (OSTI)

This revised ITP tip sheet on returning condensate to boilers provides how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

Not Available

2006-01-01T23:59:59.000Z

185

Building America Case Study: Advanced Boiler Load Monitoring Controllers, Chicago, Illinois (Fact Sheet)  

SciTech Connect (OSTI)

Beyond these initial system efficiency upgrades are an emerging class of Advanced Load Monitoring (ALM) aftermarket controllers that dynamically respond to the boiler load, with claims of 10% to 30% of fuel savings over a heating season. For hydronic boilers specifically, these devices perform load monitoring, with continuous measurement of supply and in some cases return water temperatures. Energy savings from these ALM controllers are derived from dynamic management of the boiler differential, where a microprocessor with memory of past boiler cycles prevents the boiler from firing for a period of time, to limit cycling losses and inefficient operation during perceived low load conditions. These differ from OTR controllers, which vary boiler setpoint temperatures with ambient conditions while maintaining a fixed differential. PARR installed and monitored the performance of one type of ALM controller, the M2G from Greffen Systems, at multifamily sites in the city of Chicago and its suburb Cary, IL, both with existing OTR control. Results show that energy savings depend on the degree to which boilers are over-sized for their load, represented by cycling rates. Also savings vary over the heating season with cycling rates, with greater savings observed in shoulder months. Over the monitoring period, over-sized boilers at one site showed reductions in cycling and energy consumption in line with prior laboratory studies, while less over-sized boilers at another site showed muted savings.

PARR

2014-09-01T23:59:59.000Z

186

Notice of construction for proposed backup package boiler  

SciTech Connect (OSTI)

The Hanford Site steam plant consists of coal-fired boilers located at the 200 East and the 200 West Areas. These boilers have provided steam to heat and cool facilities in the 200 Areas since the early 1940`s. As part of Project L-017, ``Steam System Rehabilitation, Phase II``, the 200 West Area coal-fired boilers will be permanently shut down. The shut down will only occur after a proposed package backup boiler (50,000 pounds per hour (lb/hr) steam, firing No. 2 oil) is installed at the 200 West Area. The proposed backup boiler will provide back-up services when the 200 East Area steam line, which provides steam to the 200 West Area, is down for maintenance or, when the demand for steam exceeds the supply available from the 200 East Plant. This application is a request for approval to construct and operate the package backup boiler. This request is being made pursuant to Washington Administration Code (WAC) Chapter 173-400, ``General Regulations for Air Pollution Sources``, and Chapter 173-460, ``Controls for New Sources of Toxic Air Pollutants``.

Not Available

1993-10-01T23:59:59.000Z

187

District heating and cooling systems for communities through power plant retrofit distribution network, Phase 2. Final report, 1 March 1980-31 January 1984. Volume II  

SciTech Connect (OSTI)

This volume begins with an Introduction summarizing the history, methodology and scope of the study, the project team members and the private and public groups consulted in the course of the study. The Load and Service Area Assessment follows, including: a compilation and analysis of existing statistical thermal load data from census data, industrial directories, PSE and G records and other sources; an analysis of responses to a detailed, 4-page thermal load questionnaire; data on public buildings and fuel and energy use provided by the New Jersey Dept. of Energy; and results of other customer surveys conducted by PSE and G. A discussion of institutional questions follows. The general topic of rates is then discussed, including a draft hypothetical Tariff for Thermal Services. Financial considerations are discussed including a report identifying alternative ownership/financing options for district heating systems and the tax implications of these options. Four of these options were then selected by PSE and G and a financial (cash-flow) analysis done (by the PSE and G System Planning Dept.) in comparison with a conventional heating alternative. Year-by-year cost of heat ($/10/sup 6/ Btu) was calculated and tabulated, and the various options compared.

Not Available

1984-01-31T23:59:59.000Z

188

Small boiler uses waste coal  

SciTech Connect (OSTI)

Burning coal waste in small boilers at low emissions poses considerable problem. While larger boiler suppliers have successfully installed designs in the 40 to 80 MW range for some years, the author has been developing small automated fluid bed boiler plants for 25 years that can be applied in the range of 10,000 to 140,000 lbs/hr of steam. Development has centered on the use of an internally circulating fluid bed (CFB) boiler, which will burn waste fuels of most types. The boiler is based on the traditional D-shaped watertable boiler, with a new type of combustion chamber that enables a three-to-one turndown to be achieved. The boilers have all the advantages of low emissions of the large fluid boilers while offering a much lower height incorporated into the package boiler concept. Recent tests with a waste coal that had a high nitrogen content of 1.45% demonstrated a NOx emission below the federal limit of 0.6 lbs/mm Btu. Thus a NOx reduction on the order of 85% can be demonstrate by combustion modification alone. Further reductions can be made by using a selective non-catalytic reduction (SNCR) system and sulfur absorption of up to 90% retention is possible. The article describes the operation of a 30,000 lbs/hr boiler at the Fayette Thermal LLC plant. Spinheat has installed three ICFB boilers at a nursing home and a prison, which has been tested on poor-grade anthracite and bituminous coal. 2 figs.

Virr, M.J. [Spinheat Ltd. (United States)

2009-07-15T23:59:59.000Z

189

Conceptual design study of geothermal district heating of a thirty-house subdivision in Elko, Nevada, using existing water-distribution systems, Phase III. Final technical report, October 1, 1979-September 30, 1980  

SciTech Connect (OSTI)

A conceptual design study for district heating of a 30-home subdivision located near the southeast extremity of the city of Elko, Nevada is presented. While a specific residential community was used in the study, the overall approach and methodologies are believed to be generally applicable for a large number of communities where low temperature geothermal fluid is available. The proposed district heating system utilizes moderate temperature, clean domestic water and existing community culinary water supply lines. The culinary water supply is heated by a moderate temperature geothermal source using a single heat exchanger at entry to the subdivision. The heated culinary water is then pumped to the houses in the community where energy is extracted by means of a water supplied heat pump. The use of heat pumps at the individual houses allows economic heating to result from supply of relatively cool water to the community, and this precludes the necessity of supplying objectionably hot water for normal household consumption use. Each heat pump unit is isolated from the consumptive water flow such that contamination of the water supply is avoided. The community water delivery system is modified to allow recirculation within the community, and very little rework of existing water lines is required. The entire system coefficient of performance (COP) for a typical year of heating is 3.36, exclusive of well pumping energy.

Pitts, D.R.

1980-09-30T23:59:59.000Z

190

UNIVERSITY OF THE DISTRICT OF  

E-Print Network [OSTI]

UNIVERSITY OF THE DISTRICT OF COLUMBIA 1 Removal of Eutrophic Nutrients from Wastewater-Supplemented Digester Elutriate in the Fermentor 2. The Effect of Differential- Heating of Digester Elutriate on its

District of Columbia, University of the

191

The Reality and Future Scenarios of Commercial Building Energy Consumption in China  

E-Print Network [OSTI]

Geothermal Heat Pump Room AC Heat Pump Stove Electric Heater Small Cogen Gas Boiler Boiler District Heating Fig.4 Space Cooling

Zhou, Nan

2008-01-01T23:59:59.000Z

192

Boilers | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartmentAUDIT REPORTOpenWendeGuo Feng Bio JumpVenturesCoral CapitalBoilers Jump to:

193

Ultra-Supercritical Pressure CFB Boiler Conceptual Design Study  

SciTech Connect (OSTI)

Electric utility interest in supercritical pressure steam cycles has revived in the United States after waning in the 1980s. Since supercritical cycles yield higher plant efficiencies than subcritical plants along with a proportional reduction in traditional stack gas pollutants and CO{sub 2} release rates, the interest is to pursue even more advanced steam conditions. The advantages of supercritical (SC) and ultra supercritical (USC) pressure steam conditions have been demonstrated in the high gas temperature, high heat flux environment of large pulverized coal-fired (PC) boilers. Interest in circulating fluidized bed (CFB) combustion, as an alternative to PC combustion, has been steadily increasing. Although CFB boilers as large as 300 MWe are now in operation, they are drum type, subcritical pressure units. With their sizes being much smaller than and their combustion temperatures much lower than those of PC boilers (300 MWe versus 1,000 MWe and 1600 F versus 3500 F), a conceptual design study was conducted herein to investigate the technical feasibility and economics of USC CFB boilers. The conceptual study was conducted at 400 MWe and 800 MWe nominal plant sizes with high sulfur Illinois No. 6 coal used as the fuel. The USC CFB plants had higher heating value efficiencies of 40.6 and 41.3 percent respectively and their CFB boilers, which reflect conventional design practices, can be built without the need for an R&D effort. Assuming construction at a generic Ohio River Valley site with union labor, total plant costs in January 2006 dollars were estimated to be $1,551/kW and $1,244/kW with costs of electricity of $52.21/MWhr and $44.08/MWhr, respectively. Based on the above, this study has shown that large USC CFB boilers are feasible and that they can operate with performance and costs that are competitive with comparable USC PC boilers.

Zhen Fan; Steve Goidich; Archie Robertson; Song Wu

2006-06-30T23:59:59.000Z

194

Slag monitoring system for combustion chambers of steam boilers  

SciTech Connect (OSTI)

The computer-based boiler performance system presented in this article has been developed to provide a direct and quantitative assessment of furnace and convective surface cleanliness. Temperature, pressure, and flow measurements and gas analysis data are used to perform heat transfer analysis in the boiler furnace and evaporator. Power boiler efficiency is calculated using an indirect method. The on-line calculation of the exit flue gas temperature in a combustion chamber allows for an on-line heat flow rate determination, which is transferred to the boiler evaporator. Based on the energy balance for the boiler evaporator, the superheated steam mass flow rate is calculated taking into the account water flow rate in attemperators. Comparing the calculated and the measured superheated steam mass flow rate, the effectiveness of the combustion chamber water walls is determined in an on-line mode. Soot-blower sequencing can be optimized based on actual cleaning requirements rather than on fixed time cycles contributing to lowering of the medium usage in soot blowers and increasing of the water-wall lifetime.

Taler, J.; Taler, D. [Cracow University of Technology, Krakow (Poland)

2009-07-01T23:59:59.000Z

195

Residential Bulk-Fed Wood-Pellet Central Boilers and Furnace Rebate Program  

Broader source: Energy.gov [DOE]

The New Hampshire Public Utilities Commission (PUC) is offering rebates of 30% of the installed cost of qualifying new residential bulk-fed, wood-pellet central heating boilers or furnaces. The...

196

Integrated boiler, superheater, and decomposer for sulfuric acid decomposition  

DOE Patents [OSTI]

A method and apparatus, constructed of ceramics and other corrosion resistant materials, for decomposing sulfuric acid into sulfur dioxide, oxygen and water using an integrated boiler, superheater, and decomposer unit comprising a bayonet-type, dual-tube, counter-flow heat exchanger with a catalytic insert and a central baffle to increase recuperation efficiency.

Moore, Robert (Edgewood, NM); Pickard, Paul S. (Albuquerque, NM); Parma, Jr., Edward J. (Albuquerque, NM); Vernon, Milton E. (Albuquerque, NM); Gelbard, Fred (Albuquerque, NM); Lenard, Roger X. (Edgewood, NM)

2010-01-12T23:59:59.000Z

197

Best Management Practice #8: Boiler and Steam Systems  

Broader source: Energy.gov [DOE]

Boilers and steam generators are commonly used in large heating systems, institutional kitchens, or in facilities where large amounts of process steam are used. This equipment consumes varying amounts of water depending on system size, the amount of steam used, and the amount of condensate returned.

198

List of Boilers Incentives | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat JumpInc Place:KeystoneSolar (Texas) JumpEventBoilers Incentives Jump to:

199

apparent molar heat: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Websites Summary: efficient use of renewable energy in district heating individual heat pumps solar heating and wood pellets individual heat pumps, solar heating and...

200

Modeling of a coal-fired natural circulation boiler  

SciTech Connect (OSTI)

Modeling of a natural circulation boiler for a coal-fired thermal power station is presented here. The boiler system is divided into seven subcomponents, and for each section, models based on conservation of mass, momentum, and energy are formulated. The pressure drop at various sections and the heat transfer coefficients are computed using empirical correlations. Solutions are obtained by using SIMULINK. The model is validated by comparing its steady state and dynamic responses with the actual plant data. Open loop responses of the model to the step changes in the operating parameters, such as pressure, temperature, steam flow, feed water flow, are also analyzed. The present model can be used for the development and design of effective boiler control systems.

Bhambare, K.S.; Mitra, S.K.; Gaitonde, U.N. [Indian Institute of Technology, Bombay (India). Dept. of Mechanical Engineering

2007-06-15T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Techno-economic analysis of wood biomass boilers for the greenhouse industry  

SciTech Connect (OSTI)

The objective of this study is to perform a techno-economic analysis on a typical wood pellet and wood residue boiler for generation of heat to an average-sized greenhouse in British Columbia. The variables analyzed included greenhouse size and structure, boiler efficiency, fuel types, and source of carbon dioxide (CO2) for crop fertilization. The net present value (NPV) show that installing a wood pellet or a wood residue boiler to provide 40% of the annual heat demand is more economical than using a natural gas boiler to provide all the heat at a discount rate of 10%. For an assumed lifespan of 25 years, a wood pellet boiler system could generate NPV of C$259,311 without electrostatic precipitator (ESP) and C$74,695 with ESP, respectively. While, installing a wood residue boiler with or without an ESP could provide NPV of C$919,922 or C$1,104,538, respectively. Using a wood biomass boiler could also eliminate over 3000 tonne CO2 equivalents of greenhouse gases annually. Wood biomass combustion generates more particulate matters than natural gas combustion. However, an advanced emission control system could significantly reduce particulate matters emission from wood biomass combustion which would bring the particulate emission to a relatively similar level as for natural gas.

Chau, J. [University of British Columbia, Vancouver; Sowlati, T. [University of British Columbia, Vancouver; Sokhansanj, Shahabaddine [ORNL; Bi, X.T. [University of British Columbia, Vancouver; Preto, F. [Natural Resources Canada; Melin, Staffan [University of British Columbia, Vancouver

2009-01-01T23:59:59.000Z

202

Standby cooling system for a fluidized bed boiler  

DOE Patents [OSTI]

A system for protecting components including the heat exchangers of a fluidized bed boiler against thermal mismatch. The system includes an injection tank containing an emergency supply of heated and pressurized feedwater. A heater is associated with the injection tank to maintain the temperature of the feedwater in the tank at or about the same temperature as that of the feedwater in the heat exchangers. A pressurized gas is supplied to the injection tank to cause feedwater to flow from the injection tank to the heat exchangers during thermal mismatch.

Crispin, Larry G. (Akron, OH); Weitzel, Paul S. (Canal Fulton, OH)

1990-01-01T23:59:59.000Z

203

Waste Heat Boilers for Incineration Applications  

E-Print Network [OSTI]

Incineration is a widely used process for disposing of solid, liquid and gaseous wastes generated in various types of industries. In addition to destroying pollutants, energy may also be recovered from the waste gas streams in the form of steam...

Ganapathy, V.

204

International District Energy Association  

Broader source: Energy.gov [DOE]

Since its formation in 1909, the International District Energy Association (IDEA) has served as a principal industry advocate and management resource for owners, operators, developers, and suppliers of district heating and cooling systems in cities, campuses, bases, and healthcare facilities. Today, with over 1,400 members in 26 countries, IDEA continues to organize high-quality technical conferences that inform, connect, and advance the industry toward higher energy efficiency and lower carbon emissions through innovation and investment in scalable sustainable solutions. With the support of DOE, IDEA performs industry research and market analysis to foster high impact projects and help transform the U.S. energy industry. IDEA was an active participant in the original Vision and Roadmap process and has continued to partner with DOE on combined heat and power (CHP) efforts across the country.

205

Steam Conservation and Boiler Plant Efficiency Advancements  

E-Print Network [OSTI]

This paper examines several cost-effective steam conservation and boiler plant efficiency advancements that were implemented during a recently completed central steam boiler plant replacement project at a very large semiconductor manufacturing...

Fiorino, D. P.

206

Taking out 1 billion tons of CO2: The magic of China's 11th Five-Year Plan?  

E-Print Network [OSTI]

Heat Pump Centralized AC by NG Electric water heater Gasheater gas boiler boiler stove district heating heat pump conditioner Air conditioning Lighting Cooking and waterWater heating Technologies Electric heater Gas boiler Boiler Small cogen Stove District heating Heat pump

Lin, Jiang

2008-01-01T23:59:59.000Z

207

CHP Integrated with Burners for Packaged Boilers  

SciTech Connect (OSTI)

The objective of this project was to engineer, design, fabricate, and field demonstrate a Boiler Burner Energy System Technology (BBEST) that integrates a low-cost, clean burning, gas-fired simple-cycle (unrecuperated) 100 kWe (net) microturbine (SCMT) with a new ultra low-NOx gas-fired burner (ULNB) into one compact Combined Heat and Power (CHP) product that can be retrofit on new and existing industrial and commercial boilers in place of conventional burners. The Scope of Work for this project was segmented into two principal phases: (Phase I) Hardware development, assembly and pre-test and (Phase II) Field installation and demonstration testing. Phase I was divided into five technical tasks (Task 2 to 6). These tasks covered the engineering, design, fabrication, testing and optimization of each key component of the CHP system principally, ULNB, SCMT, assembly BBEST CHP package, and integrated controls. Phase I work culminated with the laboratory testing of the completed BBEST assembly prior to shipment for field installation and demonstration. Phase II consisted of two remaining technical tasks (Task 7 and 8), which focused on the installation, startup, and field verification tests at a pre-selected industrial plant to document performance and attainment of all project objectives. Technical direction and administration was under the management of CMCE, Inc. Altex Technologies Corporation lead the design, assembly and testing of the system. Field demonstration was supported by Leva Energy, the commercialization firm founded by executives at CMCE and Altex. Leva Energy has applied for patent protection on the BBEST process under the trade name of Power Burner and holds the license for the burner currently used in the product. The commercial term Power Burner is used throughout this report to refer to the BBEST technology proposed for this project. The project was co-funded by the California Energy Commission and the Southern California Gas Company (SCG), a division of Sempra Energy. These match funds were provided via concurrent contracts and investments available via CMCE, Altex, and Leva Energy The project attained all its objectives and is considered a success. CMCE secured the support of GI&E from Italy to supply 100 kW Turbec T-100 microturbines for the project. One was purchased by the projects subcontractor, Altex, and a second spare was purchased by CMCE under this project. The microturbines were then modified to convert from their original recuperated design to a simple cycle configuration. Replacement low-NOx silo combustors were designed and bench tested in order to achieve compliance with the California Air Resources Board (CARB) 2007 emission limits for NOx and CO when in CHP operation. The converted microturbine was then mated with a low NOx burner provided by Altex via an integration section that allowed flow control and heat recovery to minimize combustion blower requirements; manage burner turndown; and recover waste heat. A new fully integrated control system was designed and developed that allowed one-touch system operation in all three available modes of operation: (1) CHP with both microturbine and burner firing for boiler heat input greater than 2 MMBtu/hr; (2) burner head only (BHO) when the microturbine is under service; and (3) microturbine only when boiler heat input requirements fall below 2 MMBtu/hr. This capability resulted in a burner turndown performance of nearly 10/1, a key advantage for this technology over conventional low NOx burners. Key components were then assembled into a cabinet with additional support systems for generator cooling and fuel supply. System checkout and performance tests were performed in the laboratory. The assembled system and its support equipment were then shipped and installed at a host facility where final performance tests were conducted following efforts to secure fabrication, air, and operating permits. The installed power burner is now in commercial operation and has achieved all the performance goals.

Castaldini, Carlo; Darby, Eric

2013-09-30T23:59:59.000Z

208

Sootblowing optimization for improved boiler performance  

DOE Patents [OSTI]

A sootblowing control system that uses predictive models to bridge the gap between sootblower operation and boiler performance goals. The system uses predictive modeling and heuristics (rules) associated with different zones in a boiler to determine an optimal sequence of sootblower operations and achieve boiler performance targets. The system performs the sootblower optimization while observing any operational constraints placed on the sootblowers.

James, John Robert; McDermott, John; Piche, Stephen; Pickard, Fred; Parikh, Neel J.

2012-12-25T23:59:59.000Z

209

Sootblowing optimization for improved boiler performance  

DOE Patents [OSTI]

A sootblowing control system that uses predictive models to bridge the gap between sootblower operation and boiler performance goals. The system uses predictive modeling and heuristics (rules) associated with different zones in a boiler to determine an optimal sequence of sootblower operations and achieve boiler performance targets. The system performs the sootblower optimization while observing any operational constraints placed on the sootblowers.

James, John Robert; McDermott, John; Piche, Stephen; Pickard, Fred; Parikh, Neel J

2013-07-30T23:59:59.000Z

210

Regional Districts (Texas)  

Broader source: Energy.gov [DOE]

Adjacent Water Control and Improvement Districts and Municipal Utility Districts can opt to form a Regional District to oversee water issues. Such districts may be created:(1) to purchase, own,...

211

Condensing economizers for small coal-fired boilers and furnaces  

SciTech Connect (OSTI)

Condensing economizers increase the thermal efficiency of boilers by recovering sensible and latent heat from exhaust gas. These economizers are currently being used commercially for this purpose in a wide range of applications. Performance is dependent upon application-specific factors affecting the utility of recovered heat. With the addition of a condensing economizer boiler efficiency improvements up to 10% are possible. Condensing economizers can also capture flue gas particulates. In this work, the potential use of condensing economizers for both efficiency improvement and control of particulate emissions from small, coal water slurry-fired boilers was evaluated. Analysis was done to predict heat transfer and particulate capture by mechanisms including: inertial impaction, interception, diffusion, thermophoretic forces, and condensation growth. Shell-and-tube geometries were considered with flue gas on the outside of Teflon-covered tubes. Experimental studies were done with both air- and water-cooled economizers refit to a small boiler. Two experimental arrangements were used including oil-firing with injection of flyash upstream of the economizer and direct coal water slurry firing. Firing rates ranged from 27 to 82 kW (92,000 to 280,000 Btu/hr). Inertial impaction was found to be the most important particulate capture mechanism and removal efficiencies to 95% were achieved. With the addition of water sprays directly on the first row of tubes, removal efficiencies increased to 98%. Use of these sprays adversely affects heat recovery. Primary benefits of the sprays are seen to be the addition of small impaction sites and future design improvements are suggested in which such small impactors are permanently added to the highest velocity regions of the economizer. Predicted effects of these added impactors on particulate removal and pressure drop are presented.

Butcher, T.A.; Litzke, W.

1994-01-01T23:59:59.000Z

212

Kethcum District Heating District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to:46 - 429 Throttled (botOpen6Kentwood, Michigan: EnergyKesona Power Pvt Ltd JumpFacility

213

Boise City Geothermal District Heating District Heating Low Temperature  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: Energy ResourcesJersey:formBlue EnergyBogota, New Jersey: EnergyGeothermal

214

Midland District Heating District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to:46 -Energieprojekte GmbH JumpSprings, Vermont: Energy Resourcesis a cityFacility | Open

215

San Bernardino District Heating District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to: navigation, searchVirginiaRooseveltVI Solaris a city inSamak,

216

Pagosa Springs District Heating District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoading map...(UtilityCounty,Orleans County,PPP EquipmentPartners LLC5 Climate

217

Philip District Heating District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoadingPenobscot County, Maine: Energy Resources2003) |Facility | Open Energy Information

218

City of Klamath Falls District Heating District Heating Low Temperature  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:Energy Nebraska (Utility Company) JumpKirkwood, Missouri (Utility Company)

219

Susanville District Heating District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov Pty LtdSteen, Minnesota:36052°,Sunfield,FarmsSupport|Economies |

220

Elko District Heat District Heating Low Temperature Geothermal Facility |  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address:011-DNA Jump37. It is classifiedProject) | OpenTexas: EnergyElkhartOpen Energy

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Covered Product Category: Commercial Boilers  

Broader source: Energy.gov [DOE]

The Federal Energy Management Program (FEMP) provides acquisition guidance and Federal efficiency requirements for commercial boilers, which is a FEMP-designated product category. Federal laws and requirements mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law.

222

Underdeposit corrosion in boiler applications  

SciTech Connect (OSTI)

Corrosion in industrial boilers is often associated with localized deposits. The most severe corrosion damage is often beneath the deposit. Waterside deposits can result in tube metal temperatures above the safe working limit for low-carbon steel. The variable of elevated metal temperature influences interactions between the deposit and corrosion processes under the deposit. Four case histories are discussed.

Seels, F.H.

1987-05-01T23:59:59.000Z

223

Implementation of Boiler Best Practices  

E-Print Network [OSTI]

. It also makes it easier to assign a value to the projects that are indicated by the questionnaire. The ten sections examine feedwater system performance and capability, with target limits for mixed-bed, two-bed, and softened water operation, boiler...

Blake, N. R.

224

Factors affecting stress assisted corrosion cracking of carbon steel under industrial boiler conditions.  

E-Print Network [OSTI]

??Failure of carbon steel boiler tubes from waterside has been reported in the utility boilers and industrial boilers for a long time. In industrial boilers, (more)

Yang, Dong

2008-01-01T23:59:59.000Z

225

Superclean coal-water slurry combustion testing in an oil-fired boiler  

SciTech Connect (OSTI)

The Pennsylvania State University is conducting a superclean coal-water slurry (SCCWS) program for the United States Department of Energy (DOE) and the Commonwealth of Pennsylvania with the objective of determining the capability of effectively firing SCCWS in an industrial boiler designed for heavy fuel oil. Penn State has entered into a cooperative agreement with DOE to determine if SCCWS (a fuel containing coal with 3.0 wt.% ash and 0.9 wt.% sulfur) can effectively be burned in a heavy fuel oil-designed industrial boiler without adverse impact on boiler rating, maintainability, reliability, and availability. The project will provide information on the design of new systems specifically configured to fire these clean coal-based fuels. The project consists of four phases: (1) design, permitting, and test planning, (2) construction and start up, (3) demonstration and evaluation (1,000-hour demonstration), and (4) program expansion (additional 1,000 hours of testing). The boiler testing wig determine if the SCCWS combustion characteristics, heat release rate, fouling and slagging behavior, corrosion and erosion limits, and fuel transport, storage, and handling characteristics can be accommodated in an oil-designed boiler system. In addition, the proof-of-concept demonstration will generate data to determine how the properties of SCCWS and its parent coal affect boiler performance. Economic factors associated with retrofitting boilers will be identified

Miller, B.G.; Pisupati, S.V.; Poe, R.L.; Morrison, J.L.; Xie, J.; Walsh, P.M.; Wincek, R.T.; Clark, D.A.; Scaroni, A.W.

1993-04-21T23:59:59.000Z

226

Superclean coal-water slurry combustion testing in an oil-fired boiler  

SciTech Connect (OSTI)

The Pennsylvania State University is conducting a superclean coal-water slurry (SCCWS) program with the objective of demonstrating the capability of effectively firing SCCWS in industrial boilers designed for oil. Penn State has entered into a cooperative agreement with DOE to determine if SCCWS (a fuel containing coal with less than 3.0% ash and 0.9% sulfur) can effectively be burned in oil-designed industrial boilers without adverse impact on boiler rating, maintainability, reliability and availability. The project will provide information on the design of new systems specifically configured to fire these clean coal-based fuels. The project consists of three phases: (1) design, permitting, and test planning, (2) construction and start up, and (3) demonstration and evaluation. The boiler testing will determine if the SCCWS combustion characteristics, heat release rate, fouling and slagging behavior, corrosion and erosion limits, and fuel transport, storage, and handling characteristics can be accommodated in an oil-designed boiler system. In addition, the proof-of-concept demonstration will generate data to determine how the properties of SCCWS and its parent coal affect boiler performance. Economic factors associated with retrofitting and operating boilers will be identified to assess the viability of future oil-to-coal retrofits. Progress is reported. 7 refs., 7 figs., 1 tab.

Miller, B.G.; Schobert, H.H.

1990-09-28T23:59:59.000Z

227

Kraft recovery boiler physical and chemical processes  

SciTech Connect (OSTI)

The focus of this book is on the recent research into the physical and chemical processes occurring in and around a black liquor recovery boiler. Almost all of the detailed technical information in this book has previously appeared in the open literature. The purpose here is not to present research for the first time, but to present it in a context of the other processes occurring in recovery boilers. Topics covered include: general characteristics of recovery boilers; black liquor thermal and transport properties; black liquor droplet formation and combustion; recovery boiler char bed processes; flow and mixing in Kraft recovery boilers; entrainment and carryover in recovery furnaces; fume formation and dust chemistry; deposits and boiler plugging; and recovery boiler thermal performance. 257 refs., 102 figs., 38 tabs.

Adams, T.N.; Frederick, W.J. (Adams (Terry N.), Tacoma, WA (USA); Oregon State Univ., Corvallis, OR (USA). Dept. of Chemical Engineering)

1988-01-01T23:59:59.000Z

228

Alternate Materials for Recovery Boiler Superheater Tubes  

SciTech Connect (OSTI)

The ever escalating demands for increased efficiency of all types of boilers would most sensibly be realized by an increase in the steam parameters of temperature and pressure. However, materials and corrosion limitations in the steam generating components, particularly the superheater tubes, present major obstacles to boiler designers in achieving systems that can operate under the more severe conditions. This paper will address the issues associated with superheater tube selection for many types of boilers; particularly chemical recovery boilers, but also addressing the similarities in issues for biomass and coal fired boilers. It will also review our recent study of materials for recovery boiler superheaters. Additional, more extensive studies, both laboratory and field, are needed to gain a better understanding of the variables that affect superheater tube corrosion and to better determine the best means to control this corrosion to ultimately permit operation of recovery boilers at higher temperatures and pressures.

Keiser, James R [ORNL; Kish, Joseph [McMaster University; Singbeil, Douglas [FPInnovations

2009-01-01T23:59:59.000Z

229

Predictive modelling of boiler fouling  

SciTech Connect (OSTI)

In this reporting period, efforts were initiated to supplement the comprehensive flow field description obtained from the RNG-Spectral Element Simulations by incorporating, in a general framework, appropriate modules to model particle and condensable species transport to the surface. Specifically, a brief survey of the literature revealed the following possible mechanisms for transporting different ash constituents from the host gas to boiler tubes as deserving prominence in building the overall comprehensive model: (1) Flame-volatilized species, chiefly sulfates, are deposited on cooled boiler tubes via the mechanism of classical vapor diffusion. This mechanism is more efficient than the particulate ash deposition, and as a result there is usually an enrichment of condensable salts, chiefly sulfates, in boiler deposits; (2) Particle diffusion (Brownian motion) may account for deposition of some fine particles below 0. 1 mm in diameter in comparison with the mechanism of vapor diffusion and particle depositions, however, the amount of material transported to the tubes via this route is probably small. (3) Eddy diffusion, thermophoretic and electrophoretic deposition mechanisms are likely to have a marked influence in transporting 0.1 to 5[mu]m particles from the host gas to cooled boiler tubes; (4) Inertial impaction is the dominant mechanism in transporting particles above 5[mu]m in diameter to water and steam tubes in pulverized coal fired boiler, where the typical flue gas velocity is between 10 to 25 m/s. Particles above 10[mu]m usually have kinetic energies in excess of what can be dissipated at impact (in the absence of molten sulfate or viscous slag deposit), resulting in their entrainment in the host gas.

Not Available

1992-01-01T23:59:59.000Z

230

Prospection of Swedish District Heating.  

E-Print Network [OSTI]

?? Due to the environment degradation and threats of the climate change, how to develop the technologies to use renewable energy and improve current energy (more)

Zeng, Yuming

2013-01-01T23:59:59.000Z

231

Omaha Public Power District- Commercial Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

Omaha Public Power District (OPPD) offers incentives for commercial and industrial customers to install energy-efficient heat pumps and replace/retrofit existing lighting systems. The Commercial...

232

Central Lincoln People's Utility District- Renewable Energy Incentive Program (Oregon)  

Broader source: Energy.gov [DOE]

Central Lincoln People's Utility District provides financial incentives for its commercial and residential customers to install photovoltaic (PV), solar water heating, wind, and hydro electric...

233

Omaha Public Power District- Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Omaha Public Power District (OPPD) offers energy credit refunds to its residential customers for installing high-efficiency heat pumps through the Energy Conservation Program. Newly constructed...

234

Vera Irrigation District #15- Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Vera Irrigation District #15 offers rebates to electric customers who improve energy efficiency. Rebates are available for water heaters, windows, heat pumps, clothes washer, duct sealing and...

235

Single-loop controllers bring boilers in line  

SciTech Connect (OSTI)

The boiler process seems simple. Some type of fuel is burned in the presence of air, forming heat and combustion gases. The heat is then absorbed by the boiler drum and transferred to the water inside. The heated water changes to steam and is exhausted, which spins an electrical turbine that produces electricity, and exhausts lower pressure steam for condensing in the process. Although this process seems simple, anything could go wrong at any time. The flame could go out, the fuel could run low, or the drum could get dirty. Let`s take a look at how to avoid these problems. The first step is to take accurate measurements. Typically, these measurements include flow, pressure, conductivity, temperature, stack analysis, and a level or two. Ambient conditions can affect performance of each measuring device, so be sure to consider the hot, drafty conditions of boiler houses when selecting/installing devices. The second step is to bring the measurement signals back to the control room. Use two-wire, loop-powered devices to transmit all signals except the stack analysis signals. Two-wire, loop-powered technology increases reliability, lowers installation costs, and eliminates ground loops. Signal conditioning takes place at the microcontroller input points. Signal conditioning is done to provide a linear, overall loop response to the controller. It also simplified measurement. Examining four types of input signal characterization will help explain the signal conditioning process. The first signal is a zero-based pressure signal with a linear characteristic. The second is a temperature measurement made by a thermocouple whose output is nonlinear. Next is a flow measurement made with a conventional d/p cell and orifice plate. It needs a square root characterization. Last is a combustion air flow measurement from the pressure drop across part of the boiler or preheater. This flow measurement is quite tricky because of a large deviation from the simple square root relationship.

Harrelson, D.; Piechota, B.

1995-08-01T23:59:59.000Z

236

Technical Report -DTU -Informatics and Mathematical Modeling (May 31, 2007) Temperature Prediction in District  

E-Print Network [OSTI]

Prediction in District Heating Systems with cFIR models Pierre Pinson , Torben S. Nielsen, Henrik Aa. Nielsen, Lyngby, Denmark Abstract Current methodologies for the optimal operation of district heating systems regularization. Results are given for the test case of the Roskilde district heating system, over a period

237

Measure Guideline: Condensing Boilers - Control Strategies for Optimizing Performance and Comfort in Residential Applications  

SciTech Connect (OSTI)

The combination of a gas-fired condensing boiler with baseboard convectors and an indirect water heater has become a common option for high-efficiency residential space heating in cold climates. While there are many condensing boilers available on the market with rated efficiencies in the low to mid 90% efficient range, it is imperative to understand that if the control systems are not properly configured, these heaters will perform no better than their non-condensing counterparts. Based on previous research efforts, it is apparent that these types of systems are typically not designed and installed to achieve maximum efficiency (Arena 2010). It was found that there is a significant lack of information for contractors on how to configure the control systems to optimize overall efficiency. For example, there is little advice on selecting the best settings for the boiler reset curve or how to measure and set flow rates in the system to ensure that the return temperatures are low enough to promote condensing. It has also been observed that recovery from setback can be extremely slow and, at times, not achieved. Recovery can be affected by the outdoor reset control, the differential setting on the boiler and over-sizing of the boiler itself. This guide is intended for designers and installers of hydronic heating systems interested in maximizing the overall system efficiency of condensing boilers when coupled with baseboard convectors. It is applicable to new and retrofit applications.

Arena, L.

2013-05-01T23:59:59.000Z

238

Applied Solutions Webinar: Insights Into District Energy  

Office of Energy Efficiency and Renewable Energy (EERE)

Local governments and their communities that inhabit dense locations can take advantage of district heating and/or cooling systems as a way to increase energy efficiency and reliability while...

239

Underground Storage Tank Management (District of Columbia)  

Broader source: Energy.gov [DOE]

The installation, upgrade and operation of any petroleum UST (>110 gallons) or hazardous substance UST System, including heating oil tanks over 1,100 gallons capacity in the District requires a...

240

--No Title--  

U.S. Energy Information Administration (EIA) Indexed Site

square feet) All Buildings* Heated Buildings Heating Equipment (more than one may apply) Heat Pumps Furnaces Individual Space Heaters District Heat Boilers Packaged Heating Units...

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Utilities District of Western Indiana REMC- Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Utilities District of Western Indiana REMC offers residential customers incentives for energy efficient heat pumps, water heaters, and air conditioners. Eligible air-source heat pump and air...

242

www.heatpumpcentre.org IEA HEAT PUMP PROGRAMME  

E-Print Network [OSTI]

for buildings in cold climates Annex 40 - Heat pump concepts for near zero- energy buildings (Operating Agent boilers and gas boilers Annex 38 - Systems using solar thermal energy in combination with heat pumps (Operating Agent: CH) The aim is to analyse solar and heat pump configurations with respect to energy savings

Oak Ridge National Laboratory

243

Fluidized bed boiler feed system  

DOE Patents [OSTI]

A fluidized bed boiler feed system for the combustion of pulverized coal. Coal is first screened to separate large from small particles. Large particles of coal are fed directly to the top of the fluidized bed while fine particles are first mixed with recycled char, preheated, and then fed into the interior of the fluidized bed to promote char burnout and to avoid elutriation and carryover.

Jones, Brian C. (Windsor, CT)

1981-01-01T23:59:59.000Z

244

Boiler - tuning basics, part 1  

SciTech Connect (OSTI)

Tuning power plant controls takes nerves of steel and an intimate knowledge of plant systems gained only by experience. Tuning controls also requires equal parts art and science, which probably is why there are so few tuning experts in the power industry. In part 1 of a two-part series, the author explores a mix of the theoretical and practical aspects of tuning boiler control. 5 figs.

Leopold, T. [ABB Inc. (United States)

2009-03-15T23:59:59.000Z

245

Determining boiler-water makeup  

SciTech Connect (OSTI)

In boiler operations, it is desirable to determine blowdown--and, thus, the feedwater`s concentration cycles--because it enables operators to calculate the theoretical concentrations of iron, copper or dispersant in the system. These calculations are important for maintaining boiler cleanliness. In practice, however, it isn`t always feasible to determine blowdown. For example, if the steam, feedwater and blowdown flows are not measured in a system, or if the measurements are not accurate, the blowdown and feedwater concentration cycles cannot be accurately determined. Also, if demineralized makeup water with very-low silica concentrations is mixed with essentially silica-free condensate, the ratio of silica in the boiler water to the silica in the feedwater may not yield accurate values for the concentration cycle. This method for calculating concentration cycles is accurate to within 5%, when the accuracy of the parameters measured are within the following limits: steam flow (2%); phosphate, residual (5%); micro calcium (50%); micro iron (25%); and phosphate, feed (10%).

Beecher, J.; Herman, K. [Ashland Chemical Co., Boonton, NJ (United States). Drew Industrial Div.

1995-10-01T23:59:59.000Z

246

Boiler tube failures in municipal waste-to-energy plants  

SciTech Connect (OSTI)

Waste-to-energy plants experienced increased boiler tube failures when the design changed from waste-heat boilers to radiant furnace waterwalls using superheat. Fireside attack by chlorine and sulfur compounds in refuse combustion products caused many forced outages in early European plants operating at high steam temperatures and pressures. Despite conservative steam conditions in the first US plants, failures occurred. As steam temperatures increased, corrosion problems multiplied. The problems have been alleviated by covering the waterwalls with either refractory or weld overlays of nickel-based alloys and using high nickel-chromium alloys for superheater tubes. Changes in furnace design to provide uniform combustion and avoid reducing conditions in the waterwall zone and to lower the gas temperature in the superheater also have helped minimize corrosion.

Krause, H.H.; Wright, I.G. [Battelle, Columbus, OH (United States)

1996-01-01T23:59:59.000Z

247

Industrial Heat Recovery - 1982  

E-Print Network [OSTI]

like: "Vertical, natural circulation boilers are intrinsically mbre reliable than horizontal, forced circula tion boilers.",4 and " it will be seen that horizontal tubes have much lower heat fluxes at burnout than do vertical ones, though...-steam density difference dia gram (Figure 1) has been presented repeat edly in order to indicate a significant density difference between the two phases (even close to the critical pressure) which induces natural circulation. However, this diagra...

Csathy, D.

1982-01-01T23:59:59.000Z

248

Quantifying Energy Savings by Improving Boiler Operation  

E-Print Network [OSTI]

Dayton, OH ABSTRACT On/off operation and excess combustion air reduce boiler energy efficiency. This paper presents methods to quantify energy savings from switching to modulation control mode and reducing excess air in natural gas fired boilers... the accuracy of the methods. INTRODUCTION In our experience, common opportunities for improving boiler efficiency include switching from on/off to modulation control and reducing excess air. The decision about whether to pursue these opportunities...

Carpenter, K.; Kissock, J. K.

2005-01-01T23:59:59.000Z

249

Effect of bed pressure drop on performance of a CFB boiler  

SciTech Connect (OSTI)

The effect of bed pressure drop and bed inventory on the performances of a circulating fluidized bed (CFB) boiler was studied. By using the state specification design theory, the fluidization state of the gas-solids flow in the furnace of conventional CFB boilers was reconstructed to operate at a much lower bed pressure drop by reducing bed inventory and control bed quality. Through theoretical analysis, it was suggested that there would exist a theoretical optimal value of bed pressure drop, around which the boiler operation can achieve the maximal combustion efficiency and with significant reduction of the wear of the heating surface and fan energy consumption. The analysis was validated by field tests carried out in a 75 t/h CFB boiler. At full boiler load, when bed pressure drop was reduced from 7.3 to 3.2 kPa, the height of the dense zone in the lower furnace decreased, but the solid suspension density profile in the upper furnace and solid flow rate were barely influenced. Consequently, the average heat transfer coefficient in the furnace was kept nearly the same and the furnace temperature increment was less than 17{sup o}C. It was also found that the carbon content in the fly ash decreased first with decreasing bed pressure drop and then increased with further increasing bed pressure drop. The turning point with minimal carbon content was referred to as the point with optimal bed pressure drop. For this boiler, at the optimum point the bed pressure was around 5.7 kPa with the overall excess air ratio of 1.06. When the boiler was operated around this optimal point, not only the combustion efficiency was improved, but also fan energy consumption and wear of heating surface were reduced. 23 refs., 6 figs., 4 tabs.

Hairui Yang; Hai Zhang; Shi Yang; Guangxi Yue; Jun Su; Zhiping Fu [Tsinghua University, Beijing (China). Department of Thermal Engineering

2009-05-15T23:59:59.000Z

250

Stress-Assisted Corrosion in Boiler Tubes  

SciTech Connect (OSTI)

A number of industrial boilers, including in the pulp and paper industry, needed to replace their lower furnace tubes or decommission many recovery boilers due to stress-assisted corrosion (SAC) on the waterside of boiler tubes. More than half of the power and recovery boilers that have been inspected reveal SAC damage, which portends significant energy and economic impacts. The goal of this project was to clarify the mechanism of stress-assisted corrosion (SAC) of boiler tubes for the purpose of determining key parameters in its mitigation and control. To accomplish this in-situ strain measurements on boiler tubes were made. Boiler water environment was simulated in the laboratory and effects of water chemistry on SAC initiation and growth were evaluated in terms of industrial operations. Results from this project have shown that the dissolved oxygen is single most important factor in SAC initiation on carbon steel samples. Control of dissolved oxygen can be used to mitigate SAC in industrial boilers. Results have also shown that sharp corrosion fatigue and bulbous SAC cracks have similar mechanism but the morphology is different due to availability of oxygen during boiler shutdown conditions. Results are described in the final technical report.

Preet M Singh; Steven J Pawel

2006-05-27T23:59:59.000Z

251

Upgrade Boilers with Energy-Efficient Burners  

SciTech Connect (OSTI)

This revised ITP steam tip sheet on upgrading boilers provides how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

Not Available

2006-01-01T23:59:59.000Z

252

Best Practices: The Engineering Approach For Industrial Boilers  

E-Print Network [OSTI]

, as well as plant profitability. Boiler Best Practices represent The Engineering Approach for Boilers-a way to examine mechanical, operational and chemical aspects of the systems (pretreatment through condensate) to ensure reliable boiler operations...

Blake, N. R.

253

Natural Resources Districts (Nebraska)  

Broader source: Energy.gov [DOE]

This statute establishes Natural Resources District, encompassing all of the area of the state, to conserve, protect, develop, and manage Nebraska's natural resources. These districts replace and...

254

Conservation Districts (South Dakota)  

Broader source: Energy.gov [DOE]

A Conservation District can be established by petition of registered voters within the territory proposed for organization into the district, with the approval of the State Conservation Commission....

255

Southern Power District- Residential Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

Southern Power District (SPD) offers rebates for the purchase and installation of efficient air source heat pumps, geothermal heat pumps, attic insulation, and HVAC tune-ups. Contractors who...

256

Low NO sub x /SO sub x Burner retrofit for utility cyclone boilers  

SciTech Connect (OSTI)

Cyclone furnaces operate with high excess air and at high temperature. The heat release during combustion is very high and as a result the boiler volume is much smaller than would be found in a conventional pc-fired system. The Marion Unit 1 boiler, at the level of the cyclone entry, has a small cross-section; about 5-feet in depth and about 20-feet in width. A boiler schematic showing the LNS Burner and relative location of the superheater region and overfire air ports is shown in Figure 1. The LNS Burner's combustion process is fundamentally different from that of the cyclone, and the combustion products are also different. The LNS Burner products enter the boiler as hot, fuel-rich gases. Additional overfire air must be added to complete this combustion step with care taken to avoid the formation of thermal NO{sub x}. If done correctly, S0{sub 2} is controlled and significant NO{sub x} reductions are achieved. Because of the small boiler volume, flow modelling was found to be necessary to insure that adequate mixing of LNS Burner combustion products with air can be accomplished to achieve NO{sub x} emissions goals. Design requirements for the air injection system for the Marion boiler were developed using FLUENT, a commercially available computational fluid dynamics (CFD) code. A series of runs were made to obtain a design for final air injection that met the process design goals as closely as possible.

Not Available

1990-01-01T23:59:59.000Z

257

Biomass Boiler and Furnace Emissions and Safety Regulations in...  

Open Energy Info (EERE)

Biomass Boiler and Furnace Emissions and Safety Regulations in the Northeast States Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Biomass Boiler and Furnace Emissions...

258

Consider Installing High-Pressure Boilers with BackpressureTurbine...  

Broader source: Energy.gov (indexed) [DOE]

High-Pressure Boilers with Backpressure Turbine-Generators Consider Installing High-Pressure Boilers with Backpressure Turbine-Generators This tip sheet outlines the benefits of...

259

A Methodology for Optimizing Boiler Operating Strategy  

E-Print Network [OSTI]

Among the many ways by which an energy manager can conserve energy is the establishment of a strategy for operation of fired boilers. In particular, he can effect total fuel consumption by his decision on how much on-line boiler surplus is required...

Jones, K. C.

1983-01-01T23:59:59.000Z

260

Mercury control challenge for industrial boiler MACT affected facilities  

SciTech Connect (OSTI)

An industrial coal-fired boiler facility conducted a test program to evaluate the effectiveness of sorbent injection on mercury removal ahead of a fabric filter with an inlet flue gas temperature of 375{sup o}F. The results of the sorbent injection testing are essentially inconclusive relative to providing the facility with enough data upon which to base the design and implementation of permanent sorbent injection system(s). The mercury removal performance of the sorbents was significantly less than expected. The data suggests that 50 percent mercury removal across a baghouse with flue gas temperatures at or above 375{sup o}F and containing moderate levels of SO{sub 3} may be very difficult to achieve with activated carbon sorbent injection alone. The challenge many coal-fired industrial facilities may face is the implementation of additional measures beyond sorbent injection to achieve high levels of mercury removal that will likely be required by the upcoming new Industrial Boiler MACT rule. To counter the negative effects of high flue gas temperature on mercury removal with sorbents, it may be necessary to retrofit additional boiler heat transfer surface or spray cooling of the flue gas upstream of the baghouse. Furthermore, to counter the negative effect of moderate or high SO{sub 3} levels in the flue gas on mercury removal, it may be necessary to also inject sorbents, such as trona or hydrated lime, to reduce the SO{sub 3} concentrations in the flue gas. 2 refs., 1 tab.

NONE

2009-09-15T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

IRRIGATION & ELECTRICAL DISTRICTS | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

IRRIGATION & ELECTRICAL DISTRICTS IRRIGATION & ELECTRICAL DISTRICTS IRRIGATION & ELECTRICAL DISTRICTS More Documents & Publications Interested Parties - WAPA Public...

262

Effects of copper deposition on boiler waterside surfaces  

SciTech Connect (OSTI)

The relative importance of metal oxide corrosion products in waterside deposits, as opposed to traditional scale-forming constituents, is discussed, and the sources of copper and copper oxide boiler deposits are reviewed. Also reviewed are explanations of some of the problems associated with the presence of deposits and especially, copper-containing deposits. These include those due to a reduction in heat transfer and tube metal overheating, as well as various corrosion mechanisms. Case histories, which illustrate certain deleterious mechanisms due to the presence of such deposition, are also presented.

Wangerin, M.C.; Rondum, K.D. [Ashland Chemical Co., Boonton, NJ (United States)

1995-12-01T23:59:59.000Z

263

www.heatpumpcentre.or IEA HEAT PUMP PROGRAMME  

E-Print Network [OSTI]

) #12;www.heatpumpcentre.or g Annex 41 ­ Cold climate heat pumps (Improving low ambient temperature to efficient and reliable systems and equipment for buildings in cold climates Annex 40 Heat pump concepts technologies, such as pellet boilers and gas boilers Annex 38 Systems using solar thermal energy

Oak Ridge National Laboratory

264

Retrofitted coal-fired firetube boiler and method employed therewith  

DOE Patents [OSTI]

A coal-fired firetube boiler and a method for converting a gas-fired firetube boiler to a coal-fired firetube boiler are disclosed. The converted boiler includes a plurality of combustion zones within the firetube and controlled stoichiometry within the combustion zones. 19 figs.

Wagoner, C.L.; Foote, J.P.

1995-07-04T23:59:59.000Z

265

A new blowdown compensation scheme for boiler leak detection  

E-Print Network [OSTI]

considers the blowdown effect in industrial boiler operation. This adds to the efficiency of recent advancesA new blowdown compensation scheme for boiler leak detection A. M. Pertew ,1 X. Sun ,1 R. Kent in identification-based leak detection techniques of boiler steam- water systems. Keywords: Industrial Boilers, Tube

Marquez, Horacio J.

266

Using HYTECH to Synthesize Control Parameters for a Steam Boiler? ??  

E-Print Network [OSTI]

Using HYTECH to Synthesize Control Parameters for a Steam Boiler? ?? Thomas A. Henzinger1 Howard model a steam-boiler control system using hybrid au- tomata. We provide two abstracted linear models that guarantee the safety of the boiler. 1 Introduction A description of an industrial steam boiler has been

Henzinger, Thomas A.

267

Retrofitted coal-fired firetube boiler and method employed therewith  

DOE Patents [OSTI]

A coal-fired firetube boiler and a method for converting a gas-fired firetube boiler to a coal-fired firetube boiler, the converted boiler including a plurality of combustion zones within the firetube and controlled stoichiometry within the combustion zones.

Wagoner, Charles L. (Tullahoma, TN); Foote, John P. (Tullahoma, TN)

1995-01-01T23:59:59.000Z

268

Estimating Total Energy Consumption and Emissions of China's Commercial and Office Buildings  

E-Print Network [OSTI]

Geothermal Heat Pump Central AC by NG Electric water heaterwater heating Technologies Electric heater Gas boiler Coal Boiler Small cogen Stove District heating Heat pumpHeat Pump* *COP Reference Case Alternative Case Table 10 Office Buildings: Water Heating Efficiency Boiler Gas Boiler Small Cogen Electric Water Heater

Fridley, David G.

2008-01-01T23:59:59.000Z

269

Demonstration of sorbent injection technology on a tangentially coal-fired utility boiler (Yorktown Limb Demonstration)  

SciTech Connect (OSTI)

Limestone Injection Multistage Burner (LIMB) technology has been successfully demonstrated on a tangentially fired coal-burning utility boiler, Virginia Power`s 180 MWe Yorktown Unit No. 2. This document summarizes the activities conducted, and results achieved, under this EPA-sponsored demonstration program. LIMB combines furnace injection of a calcium-based sorbent for moderate reductions of sulfur dioxide with a low nitrogen oxide firing system for NO{sub x} emissions reduction. The process is attractive for retrofit of existing coal-burning utility boilers, since the capital equipment requirements and overall sulfur reduction costs per ton of SO{sub 2} removed are less than for most other options, such as wet flue gas desulfurization. Five sorbents were tested: commercial hydrated lime, with and without calcium lignosulfonate treatment, each from two suppliers, and finely pulverized limestone. The effects of LIMB operation on boiler, electrostatic precipitator (ESP), and ash handling system performance are also discussed. The most significant impact on boiler performance was the deposition rate of LIMB solids plus flyash on boiler convective surfaces during continuous operation, resulting in poorer boiler heat transfer performance and higher temperatures leaving the boiler. Continuous operation of the sootblowing system minimized this effect. The results of two ESP performance tests which were conducted during continuous LIMB operation are discussed and compared to results from similar testing conducted without LIMB operation. Ash conditioning and disposal during LIMB operation at Yorktown was significantly affected by the unreacted lime in the ash. These problems, as well as suggested precautions to avoid them, are discussed. Recommendations for LIMB commercialization, and an evaluation of the economics of the technology in comparison to a conventional flue gas desulfurization system, are discussed.

Clark, J.P.; Koucky, R.W.; Gogineni, M.R. [Combustion Engineering, Inc., Windsor, CT (United States)] [and others

1995-06-01T23:59:59.000Z

270

Boiler and steam generator corrosion. (Latest citations from the NTIS Bibliographic database). Published Search  

SciTech Connect (OSTI)

The bibliography contains citations concerning corrosion effects, mechanisms, detection, and inhibition in fossil fuel fired boilers and nuclear powered steam generators. Corrosion studies performed on the water side and hot gas side of heat exchanger tubes and support structures are presented. Water treatment, chemical cleaning, and descaling methods are considered. Although emphasis is placed on large-scale power generation systems, residential and commercial heating systems are also discussed. (Contains 250 citations and includes a subject term index and title list.)

Not Available

1994-11-01T23:59:59.000Z

271

Boiler and steam generator corrosion. (Latest citations from the NTIS bibliographic database). Published Search  

SciTech Connect (OSTI)

The bibliography contains citations concerning corrosion effects, mechanisms, detection, and inhibition in fossil fuel fired boilers and nuclear powered steam generators. Corrosion studies performed on the water side and hot gas side of heat exchanger tubes and support structures are presented. Water treatment, chemical cleaning, and descaling methods are considered. Although emphasis is placed on large-scale power generation systems, residential and commercial heating systems are also discussed. (Contains 250 citations and includes a subject term index and title list.)

Not Available

1994-01-01T23:59:59.000Z

272

Black liquor combustion validated recovery boiler modeling: Final year report. Volume 4 (Appendix IV)  

SciTech Connect (OSTI)

This project was initiated in October 1990, with the objective of developing and validating a new computer model of a recovery boiler furnace using a computational fluid dynamics (CFD) code specifically tailored to the requirements for solving recovery boiler flows, and using improved submodels for black liquor combustion based on continued laboratory fundamental studies. The key tasks to be accomplished were as follows: (1) Complete the development of enhanced furnace models that have the capability to accurately predict carryover, emissions behavior, dust concentrations, gas temperatures, and wall heat fluxes. (2) Validate the enhanced furnace models, so that users can have confidence in the predicted results. (3) Obtain fundamental information on aerosol formation, deposition, and hardening so as to develop the knowledge base needed to relate furnace model outputs to plugging and fouling in the convective sections of the boiler. (4) Facilitate the transfer of codes, black liquid submodels, and fundamental knowledge to the US kraft pulp industry. Volume 4 contains the following appendix sections: Radiative heat transfer properties for black liquor combustion -- Facilities and techniques and Spectral absorbance and emittance data; and Radiate heat transfer determination of the optical constants of ash samples from kraft recovery boilers -- Calculation procedure; Computation program; Density determination; Particle diameter determination; Optical constant data; and Uncertainty analysis.

Grace, T.M.; Frederick, W.J.; Salcudean, M.; Wessel, R.A.

1998-08-01T23:59:59.000Z

273

Boiler scale prevention employing an organic chelant  

DOE Patents [OSTI]

An improved method of treating boiler water which employs an oxygen scavenging compound and a compound to control pH together with a chelating agent, wherein the chelating agent is hydroxyethylethylenediaminetriacetic acid.

Wallace, Steven L. (Lake Jackson, TX); Griffin, Jr., Freddie (Missouri City, TX); Tvedt, Jr., Thorwald J. (Angleton, TX)

1984-01-01T23:59:59.000Z

274

Commonwealth Small Pellet Boiler Grant Program  

Broader source: Energy.gov [DOE]

The Massachusetts Clean Energy Center (MassCEC) and the Department of Energy Resources (DOER) are offering the Commonwealth Small Pellet Boiler Pilot Grant Program to provide grants to residents...

275

Practical Procedures for Auditing Industrial Boiler Plants  

E-Print Network [OSTI]

Industrial boiler plants are an area of opportunity in virtually every industry to save energy and reduce costs by using relatively simple, inexpensive auditing procedures. An energy audit consists of inspection, measurement, analysis...

O'Neil, J. P.

1980-01-01T23:59:59.000Z

276

Energy Conservation for Boiler Water Systems  

E-Print Network [OSTI]

. This paper reviews methods to conserve energy in industrial boiler water systems. Both mechanical and chemical approaches for energy conservation are discussed. The important aspects of efficient combustion are covered as well as other mechanical factors...

Beardsley, M. L.

1981-01-01T23:59:59.000Z

277

The Analysis and Assessment on Heating Energy Consumption of SAT  

E-Print Network [OSTI]

The article introduced the fuel-energy consumption and outdoor temperatures of three heating terms from year 1999 to 2002 of SAT's fuel-boiler heating system. It demonstrated the relationship between the consumption and the temperatures by using...

Zhang, J.

2006-01-01T23:59:59.000Z

278

Recover heat from waste incineration  

SciTech Connect (OSTI)

Using these guidelines, engineers can address critical design problems associated with burning process-waste streams and select cost-effective waste-heat boilers. Incinerating contaminant streams is a win-win situation: (1) complete destruction of pollutant(s) is attained and (2) valuable thermal energy is recovered as steam and returned to process, thus conserving energy. However, recovering thermal energy from incinerated flue-gas streams contains some caveats. This treatment method creates a large high-temperature flue gas from which valuable thermal energy is recovered as saturated or superheated steam. Unfortunately, because a process-waste stream is used as feed, this stream will have variations in contaminant and component concentrations which influence the load on the boiler. Also, burning contaminants may create acid gases which will accelerate corrosion problems for the boiler at elevated temperatures. The following guidelines and checklist clarify the do`s and don`ts when designing waste-heat boilers.

Ganapathy, V. [ABCO Industries, Abilene, TX (United States)

1995-09-01T23:59:59.000Z

279

Evaluation of coal-derived liquids as boiler fuels. Volume 1. Comprehensive report. Final report  

SciTech Connect (OSTI)

A combustion demonstration using six coal-derived liquid (CDL) fuels was conducted on a utility boiler located at the Plant Sweatt Electric Generating Station of Mississippi Power Company in Meridian, Mississippi. The test program was conducted in two phases which are distinguished by the level of the test effort. The first phase included the combustion tests of the two conventional fuels used at the station (natural gas and No. 6 fuel oil) and three coal-derived liquid fuels (Solvent Refined Coal-II full range distillate, H-Coal heavy distillate and H-Coal blended distillate). Boiler performance monitoring included measurements for fuel steam and flue gas flow, pressure, temperature, and heat absorption, resulting in a calculated combustion efficiency, boiler efficiency, and heat rate. Emissions measurements included oxygen, carbon dioxide, carbon monoxide, oxides of nitrogen, sulfur dioxide, sulfur trioxide, acid dewpoint, particulate mass, size distribution and morphology, chlorides, and opacity. In general, no adverse boiler performance effects were encountered with the combustion of the CDL fuels. The test program demonstrated the general suitability of CDL fuels for use in existing oil-fired utility boilers. No significant boiler tube surface modifications will be required. With the exception of NO/sub x/ emissions, the CDL fuels will be expected to have lower levels of stack emissions compared to a conventional No. 6 fuel oil. NO/sub x/ emissions will be controllable to EPA standards with the application of conventional combustion modification techniques. Volume 1, of a five-volume report, contains a comprehensive report of the entire test program. 43 figs., 19 tabs.

Not Available

1985-09-01T23:59:59.000Z

280

Economic Improvement Districts (Indiana)  

Broader source: Energy.gov [DOE]

A legislative body may adopt an ordinance establishing an economic improvement district and an Economic Improvement Board to manage development in a respective district. The Board can choose to...

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Utilization of coal-water fuels in fire-tube boilers. Final report, October 1990--August 1994  

SciTech Connect (OSTI)

The objective of this DOE sponsored project was to successfully fire coal-water slurry in a fire-tube boiler that was designed for oil/gas firing and establish a data base that will be relevant to a large number of existing installations. Firing slurry in a fire-tube configuration is a very demanding application because of the extremely high heat release rates and the correspondingly low furnace volume where combustion can be completed. Recognizing that combustion efficiency is the major obstacle when firing slurry in a fire-tube boiler, the program was focused on innovative approaches for improving carbon burnout without major modifications to the boiler. The boiler system was successfully designed and operated to fire coal-water slurry for extended periods of time with few slurry related operational problems. The host facility was a 3.8 million Btu/hr Cleaver-Brooks fire-tube boiler located on the University of Alabama Campus. A slurry atomizer was designed that provided outstanding atomization and was not susceptible to pluggage. The boiler was operated for over 1000 hours and 12 shipments of slurry were delivered. The new equipment engineered for the coal-water slurry system consisted of the following: combustion air and slurry heaters; cyclone; baghouse; fly ash reinjection system; new control system; air compressor; CWS/gas burner and gas valve train; and storage tank and slurry handling system.

Sommer, T.; Melick, T.; Morrison, D.

1994-12-31T23:59:59.000Z

282

Local Power Empowers: CHP and District Energy (Text Version)...  

Broader source: Energy.gov (indexed) [DOE]

technical assistance program presentation. Today we're going to talk about the combined heat and power and district energy possibilities for your local organization. What we're...

283

Nebraska Public Power District- Residential Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

The Nebraska Public Power District offers rebates to homeowners who purchase energy efficient heat pumps, upgrade their insulation, and/or have their cooling system tuned-up. The High Efficiency...

284

Simulation of Combustion and Thermal Flow in an Industrial Boiler  

E-Print Network [OSTI]

Industrial boilers that produce steam or electric power represent a crucial facility for overall plant operations. To make the boiler more efficient, less emission (cleaner) and less prone to tube rupture problems, it is important to understand...

Saripalli, R.; Wang, T.; Day, B.

2005-01-01T23:59:59.000Z

285

Circulating fluidized-bed boiler makes inroads for waste recycling  

SciTech Connect (OSTI)

Circulating fluidized-bed (CFB) boilers have ben used for years in Scandinavia to burn refuse-derived fuel (RDF). Now, Foster Wheeler Power Systems, Inc., (Clinton, N.J.) is bringing the technology to the US. Touted as the world`s largest waste-to-energy plant to use CFB technology, the Robbins (III.) Resource Recovery Facility will have the capacity to process 1,600 tons/d of municipal solid waste (MSW) when it begins operation in early 1997. The facility will have two materials-separation and RDF-processing trains, each with dual trommel screens, magnetic and eddy current separators, and shredders. About 25% of the incoming MSW will be sorted and removed for recycling, while 75% of it will be turned into fuel, with a heat value of roughly 6,170 btu/lb. Once burned in the twin CFB boilers the resulting steam will be routed through a single turbine generator to produce 50,000 mW of electric power.

NONE

1995-09-01T23:59:59.000Z

286

ADVANCED, LOW/ZERO EMISSION BOILER DESIGN AND OPERATION  

SciTech Connect (OSTI)

This document reviews the work performed during the quarter October-December 2003. Task 1 (Site Preparation) had been completed in the previous reporting period. In this reporting period, one week of combustion parameters optimization has been performed in Task 2 (experimental test performance) of the project. Under full-oxy conditions (100% air replacement with O{sub 2}-enriched flue gas) in 1.5MW{sub th} coal-fired boiler, the following parameters have been varied and their impact on combustion characteristics measured: the recirculated flue gas flow rate has been varied from 80% to 95% of total flue gas flow, and the total oxygen flow rate into the primary air zone of the boiler has been set to levels ranging from 15% to 25% of the total oxygen consumption in the overall combustion. In current reporting period, significant progress has also been made in Task 3 (Techno-Economic Study) of the project: mass and energy balance calculations and cost assessment have been completed on plant capacity of 533MW{sub e} gross output while applying the methodology described in previous reporting periods. Air-fired PC Boiler and proposed Oxygen-fired PC Boiler have been assessed, both for retrofit application and new unit. The current work schedule is to review in more details the experimental data collected so far as well as the economics results obtained on the 533MWe cases, and to develop a work scope for the remainder of the project. Approximately one week of pilot testing is expected during the first quarter of 2004, including mercury emission measurement and heat transfer characterization. The project was on hold from mid-November through December 2003 due to non-availability of funds. Out of the {approx}$785k allocated DOE funds in this project, $497k have been spent to date ($480 reported so far), mainly in site preparation, test performance and economics assessment. In addition to DOE allocated funds, to date approximately $330k has been cost-shared by the participants, bringing the total project cost up to $827k ($810k reported so far) as on December 31st, 2003.

Fabienne Chatel-Pelage

2004-01-01T23:59:59.000Z

287

An Evaluation of Industrial Heat Pumps for Effective Low-Temperature Heat Utilization  

E-Print Network [OSTI]

The implementation of industrial heat pumps utilizing waste water from various industrial processes for the production of process steam is presented as a viable economic alternative to a conventional fossil-fired boiler and as an effective fuel...

Leibowitz, H. M.; Colosimo, D. D.

1980-01-01T23:59:59.000Z

288

HYDRONIC BASEBOARD THERMAL DISTRIBUTION SYSTEM WITH OUTDOOR RESET CONTROL TO ENABLE THE USE OF A CONDENSING BOILER.  

SciTech Connect (OSTI)

Use of condensing boilers in residential heating systems offers the potential for significant improvements in efficiency. For these to operate in a condensing mode the return water temperature needs to be about 10 degrees below the saturation temperature for the flue gas water vapor. This saturation temperature depends on fuel type and excess air and ranges from about 110 F to 135 F. Conventional baseboard hydronic distribution systems are most common and these are designed for water temperatures in the 180 F range, well above the saturation temperature. Operating strategies which may allow these systems to operate in a condensing mode have been considered in the past. In this study an approach to achieving this for a significant part of the heating season has been tested in an instrumented home. The approach involves use of an outdoor reset control which reduces the temperature of the water circulating in the hydronic loop when the outdoor temperature is higher than the design point for the region. Results showed that this strategy allows the boiler to operate in the condensing region for 80% of the winter heating season with oil, 90% with propane, and 95% with gas, based on cumulative degree days. The heating system as tested combines space heating and domestic hot water loads using an indirect, 40 gallon tank with an internal heat exchanger. Tests conducted during the summer months showed that the return water temperature from the domestic hot water tank heat exchanger is always below a temperature which will provide condensing operation of the boiler. In the field tests both the condensing boiler and the conventional, non-condensing boiler were in the test home and each was operated periodically to provide a direct performance comparison.

BUTCHER,T.A.

2004-10-01T23:59:59.000Z

289

FAQs Manhattanville Campus Central Energy Plant Boiler Stacks  

E-Print Network [OSTI]

FAQs Manhattanville Campus Central Energy Plant Boiler Stacks Installation Frequently Asked Questions What is happening? Columbia University is installing two (2) boiler stacks on top of the Jerome L, a below-grade facility which will consist four (4) 45,000 lbs/hr steam boilers and related equipment

Kim, Philip

290

Waterside Stress Assisted Corrosion (SAC) of Boiler Tubes  

E-Print Network [OSTI]

Waterside Stress Assisted Corrosion (SAC) of Boiler Tubes School of Materials Science Boiler Areas Susceptible to SAC · Generally SAC initiates near weld joints on cold side of tubes · SAC cracks are difficult to detect inaccessibility · Failures Detected at Various Locations in Boilers

Das, Suman

291

1 | P a g e Boiler Gold Rush  

E-Print Network [OSTI]

1 | P a g e Boiler Gold Rush VISION STATEMENT The vision of BGR is twofold: first, help all new by participating in the premiere orientation program in the nation, Boiler Gold Rush. Second, enhance upper leaders for the betterment of the university. PROGRAM GOALS Boiler Gold Rush will provide the following

Ginzel, Matthew

292

Nanotube Boiler 1 Abstract--Controlled copper evaporation at attogram  

E-Print Network [OSTI]

Nanotube Boiler 1 Abstract-- Controlled copper evaporation at attogram level from individual carbon nanotube (CNT) vessels, which we call nanotube boilers, is investigated experimentally, and ionization in these CNT boilers, which can serve as sources for mass transport and deposition in nanofluidic

Paris-Sud XI, Université de

293

Project Recap Humanitarian Engineering Biodiesel Boiler System for Steam Generator  

E-Print Network [OSTI]

Project Recap Humanitarian Engineering ­ Biodiesel Boiler System for Steam Generator Currently 70 biodiesel boiler system to drive a steam engine generator. This system is to provide electricity the customer needs, a boiler fueled by biodiesel and outputting to a steam engine was decided upon. The system

Demirel, Melik C.

294

Using HYTECH to Synthesize Control Parameters for a Steam Boiler ?;??  

E-Print Network [OSTI]

Using HYTECH to Synthesize Control Parameters for a Steam Boiler ?;?? Thomas A. Henzinger 1 Howard model a steam­boiler control system using hybrid au­ tomata. We provide two abstracted linear models constraints that guarantee the safety of the boiler. 1 Introduction A description of an industrial steam

Henzinger, Thomas A.

295

Steam boiler control speci cation problem: A TLA solution  

E-Print Network [OSTI]

Steam boiler control speci cation problem: A TLA solution Frank Le ke and Stephan Merz Institut fur of the state of the steam boiler, detect failures, and model message transmission. We give a more detailed between the physi- cal state of the steam boiler and the model maintained by the controller and discuss

296

An Object-Oriented Algebraic Steam-Boiler Control Specification  

E-Print Network [OSTI]

An Object-Oriented Algebraic Steam-Boiler Control Specification.In this paper an object-oriented algebraic solution of the steam-boiler specification problem is presented computations cannot happen. 1 Introduction The steam-boiler control specification problem has been

?lveczky, Peter Csaba

297

An Object-Oriented Algebraic Steam-Boiler Control Specification  

E-Print Network [OSTI]

An Object-Oriented Algebraic Steam-Boiler Control Specification Peter Csaba ()lveczky, Poland Abstract. In this paper an object-oriented algebraic solution of the steam-boiler specification Introduction The steam-boiler control specification problem has been proposed as a challenge for different

?lveczky, Peter Csaba

298

Streams of Steam The Steam Boiler Specification Case Study  

E-Print Network [OSTI]

Streams of Steam ­ The Steam Boiler Specification Case Study Manfred Broy, Franz Regensburger-tuned con- cepts of FOCUS by its application of the requirements specification of a steam boiler, see [Abr96-studies. In this context, applying FOCUS to the steam boiler case study ([Abr96]) led us to a couple of questions re- #12

299

Steam boiler control specification problem: A TLA solution  

E-Print Network [OSTI]

Steam boiler control specification problem: A TLA solution Frank Le?ke and Stephan Merz Institut f of the state of the steam boiler, detect failures, and model message transmission. We give a more detailed between the physi­ cal state of the steam boiler and the model maintained by the controller and discuss

Merz, Stephan

300

TA-2 Water Boiler Reactor Decommissioning Project  

SciTech Connect (OSTI)

This final report addresses the Phase 2 decommissioning of the Water Boiler Reactor, biological shield, other components within the biological shield, and piping pits in the floor of the reactor building. External structures and underground piping associated with the gaseous effluent (stack) line from Technical Area 2 (TA-2) Water Boiler Reactor were removed in 1985--1986 as Phase 1 of reactor decommissioning. The cost of Phase 2 was approximately $623K. The decommissioning operation produced 173 m{sup 3} of low-level solid radioactive waste and 35 m{sup 3} of mixed waste. 15 refs., 25 figs., 3 tabs.

Durbin, M.E. (ed.); Montoya, G.M.

1991-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Circulating Fluidized Bed Combustion Boiler Project  

E-Print Network [OSTI]

or turndown so we delayed consideration of installation of a FBC boil r. CIRCULATING FBC In early 1980 we became aware of the work by the Ahlstrom Company of Helsinki, Finland in the development of the circulating FBC boiler design. The PYROFLOW... layer is a lightweight insulating refractory. In 1979, Ahlstrom started up a 45,000 pound per hour PYROFLOW unIt at Pihlava, Finland. In 1981, 200,000 pound per hour boiler was started up 1 Kauttua, Finland as le b se load steam supply for paper...

Farbstein, S. B.; Moreland, T.

1984-01-01T23:59:59.000Z

302

Warm Springs Water District District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia:FAQ < RAPID Jump to:Seadov PtyInformationSEDS data JumpWakullaWanxiang ElectricFacility | Open

303

Elko County School District District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address:011-DNA Jump37. It is classifiedProject) | OpenTexas: EnergyElkhart County,EnergyFacility

304

Tips For Residential Heating Oil Tank Owners  

E-Print Network [OSTI]

· · · · · · · · · · · · · · · · · · · · · · Tips For Residential Heating Oil Tank Owners Source: DEP Fact Sheet Residential heating oil tanks are used to store fuel for furnaces or boilers to heat homes. The tanks can either be aboveground tanks, normally located in basements or utility rooms

Maroncelli, Mark

305

Municipal Utility Districts (Texas)  

Broader source: Energy.gov [DOE]

Municipal Utility Districts, regulated by the Texas Commission on Environmental Quality, may be created for the following purposes: (1) the control, storage, preservation, and distribution of its...

306

CONDENSING ECONOMIZERS FOR SMALL COAL-FIRED BOILERS AND FURNACES PROJECT REPORT - JANUARY 1994  

SciTech Connect (OSTI)

Condensing economizers increase the thermal efficiency of boilers by recovering sensible and latent heat from exhaust gas. These economizers are currently being used commercially for this purpose in a wide range of applications. Performance is dependent upon application-specific factors affecting the utility of recovered heat. With the addition of a condensing economizer boiler efficiency improvements up to 10% are possible. Condensing economizers can also capture flue gas particulates. In this work, the potential use of condensing economizers for both efficiency improvement and control of particulate emissions from small, coal water slurry-fired boilers was evaluated. Analysis was done to predict heat transfer and particulate capture by mechanisms including: inertial impaction, interception, diffusion, thermophoretic forces, and condensation growth. Shell-and-tube geometries were considered with flue gas on the outside of Teflon-covered tubes. Experimental studies were done with both air- and water-cooled economizers refit to a small boiler. Two experimental arrangements were used including oil-firing with injection of flyash upstream of the economizer and direct coal water slurry firing. Firing rates ranged from 27 to 82 kW (92,000 to 280,000 Btu/hr). Inertial impaction was found to be the most important particulate capture mechanism and removal efficiencies to 95% were achieved. With the addition of water sprays directly on the first row of tubes, removal efficiencies increased to 98%. Use of these sprays adversely affects heat recovery. Primary benefits of the sprays are seen to be the addition of small impaction sites and future design improvements are suggested in which such small impacts are permanently added to the highest velocity regions of the economizer. Predicted effects of these added impactors on particulate removal and pressure drop are presented.

BUTCHER,T.A.

1994-01-04T23:59:59.000Z

307

Digital radiographic systems detect boiler tube cracks  

SciTech Connect (OSTI)

Boiler water wall leaks have been a major cause of steam plant forced outages. But conventional nondestructive evaluation techniques have a poor track record of detecting corrosion fatigue cracking on the inside surface of the cold side of waterwall tubing. EPRI is performing field trials of a prototype direct-digital radiographic system that promises to be a game changer. 8 figs.

Walker, S. [EPRI, Charlotte, NC (United States)

2008-06-15T23:59:59.000Z

308

Mitsubishi FGD plants for lignite fired boilers  

SciTech Connect (OSTI)

In order to respond to the increasing electric energy demand for sustaining economic growth, construction of coal-fired thermal power plants worldwide is indispensable. As a countermeasure for environmental pollution which otherwise may reach a serious proportion from the operation of these plants, construction of flue gas desulfurization (FGD) plants is being promoted. Among these power stations where lignite fuel is burnt, the FGD plants concerned have to be designed to cope with high gas volume and SO{sub x} concentration as well as violent fluctuations in their values caused by such features of lignite as high sulfur content, low calorific volume, and unstable properties. Mitsubishi Heavy Industries (MHI) has received construction awards for a total of seven (7) FGD plants for lignite-fired boilers in succession starting from that for CEZ as, Czech Republic followed by those for EGAT, Thailand in 1993. All these plants are presently operating satisfactorily since successful completion of their performance tests in 1996. Further, a construction award of three (3) more FGD plants for lignite-fired boilers was received from ENDESA (Spain) in 1995 which are now being outfitted and scheduled to start commercial operation in 1998. In this paper, the authors discuss the outline design of FGD plants for lignite-fired boilers based on experience of FGD plants constructed since 1970 for heavy oil--as well as black coal-fired boilers, together with items confirmed from the operation and design guideline hereafter.

Kotake, Shinichiro; Okazoe, Kiyoshi; Iwashita, Koichiro; Yajima, Satoru

1998-07-01T23:59:59.000Z

309

Superclean coal-water slurry combustion testing in an oil-fired boiler. Quarterly technical progress report, November 15, 1989--February 15, 1990  

SciTech Connect (OSTI)

The Pennsylvania State University is conducting a superclean coal-water slurry (SCCWS) program for the US Department of Energy (DOE) and the Commonwealth of Pennsylvania with the objective of demonstrating the capability of effectively firing SCCWS in industrial boilers designed for oil. Penn State has entered into a cooperative agreement with DOE to determine if SCCWS (a fuel containing coal with less than 3% ash and 0.9% sulfur) can effectively be burned in oil-designed industrial boilers without adverse impact on boiler rating, maintainability, reliability, and availability. The project will provide information on the design of new systems specifically configured to fire these clean coal-based fuels. The project consists of three phases: (1) design, permitting, and test planning, (2) construction and start up, and (3) operations and disposition. The boiler testing will determine if the SCCWS combustion characteristics, heat release rate, slagging and fouling factors, erosion and corrosion limits, and fuel transport, storage, and handling can be accommodated in an oil-designed boiler. In addition, the proof-of-concept demonstration will generate data to determine how the properties of SCCWS and its parent coal affect boiler performance. Economic factors associated with retrofitting and operating boilers will be identified to assess the viability of future oil-to-coal retrofits. Progress for this quarter is summarized.

Miller, B.G.; Walsh, P.M.; Elston, J.T.; Scaroni, A.W.

1990-04-06T23:59:59.000Z

310

Superclean coal-water slurry combustion testing in an oil-fired boiler. Semiannual technical progress report, August 15, 1992--February 15, 1993  

SciTech Connect (OSTI)

The Pennsylvania State University is conducting a superclean coal-water slurry (SCCWS) program for the United States Department of Energy (DOE) and the Commonwealth of Pennsylvania with the objective of determining the capability of effectively firing SCCWS in an industrial boiler designed for heavy fuel oil. Penn State has entered into a cooperative agreement with DOE to determine if SCCWS (a fuel containing coal with 3.0 wt.% ash and 0.9 wt.% sulfur) can effectively be burned in a heavy fuel oil-designed industrial boiler without adverse impact on boiler rating, maintainability, reliability, and availability. The project will provide information on the design of new systems specifically configured to fire these clean coal-based fuels. The project consists of four phases: (1) design, permitting, and test planning, (2) construction and start up, (3) demonstration and evaluation (1,000-hour demonstration), and (4) program expansion (additional 1,000 hours of testing). The boiler testing wig determine if the SCCWS combustion characteristics, heat release rate, fouling and slagging behavior, corrosion and erosion limits, and fuel transport, storage, and handling characteristics can be accommodated in an oil-designed boiler system. In addition, the proof-of-concept demonstration will generate data to determine how the properties of SCCWS and its parent coal affect boiler performance. Economic factors associated with retrofitting boilers will be identified

Miller, B.G.; Pisupati, S.V.; Poe, R.L.; Morrison, J.L.; Xie, J.; Walsh, P.M.; Wincek, R.T.; Clark, D.A.; Scaroni, A.W.

1993-04-21T23:59:59.000Z

311

The next generation of oxy-fuel boiler systems  

SciTech Connect (OSTI)

Research in the area of oxy-fuel combustion which is being pioneered by Jupiter Oxygen Corporation combined with boiler research conducted by the USDOE/Albany Research Center has been applied to designing the next generation of oxy-fuel combustion systems. The new systems will enhance control of boiler systems during turn-down and improve response time while improving boiler efficiency. These next generation boiler systems produce a combustion product that has been shown to be well suited for integrated pollutant removal. These systems have the promise of reducing boiler foot-print and boiler construction costs. The modularity of the system opens the possibility of using this design for replacement of boilers for retrofit on existing systems.

Ochs, Thomas L.; Gross, Alex (Jupiter Oxygen Corp.); Patrick, Brian (Jupiter Oxygen Corp.); Oryshchyn, Danylo B.; Summers, Cathy A.; Turner, Paul C.

2005-01-01T23:59:59.000Z

312

Dynamic simulation of a circulating fluidized bed boiler of low circulating ratio with wide particle size distributions  

SciTech Connect (OSTI)

A steady state model of a coal fired CFB boiler considering the hydrodynamics, heat transfer and combustion is presented. This model predicts the flue gas temperature, the chemical gas species (O{sub 2}, H{sub 2}O, CO, CO{sub 2} and SO{sub 2}) and char concentration distributions in both the axial and radial location along the furnace including the bottom and upper portion. The model was validated against experimental data generated in a 35 t/h commercial CFB boiler with low circulating ratio.

Lu Huilin; Yang Lidan; Bie Rushan; Zhao Guangbo

1999-07-01T23:59:59.000Z

313

Economic Development Project Districts (Indiana)  

Broader source: Energy.gov [DOE]

Redevelopment commissions may petition legislative bodies to designate economic development project districts in cities with populations between 80,500 and 500,000. Such districts may be...

314

Oxy-Combustion Boiler Material Development  

SciTech Connect (OSTI)

Under U.S. Department of Energy Cooperative Agreement No. DE-NT0005262 Foster Wheeler North America Corp conducted a laboratory test program to determine the effect of oxy-combustion on boiler tube corrosion. In this program, CFD modeling was used to predict the gas compositions that will exist throughout and along the walls of air-fired and oxy-fired boilers operating with low to high sulfur coals. Test coupons of boiler tube materials were coated with deposits representative of those coals and exposed to the CFD predicted flue gases for up to 1000 hours. The tests were conducted in electric tube furnaces using oxy-combustion and air-fired flue gases synthesized from pressurized cylinders. Following exposure, the test coupons were evaluated to determine the total metal wastage experienced under air and oxy-combustions conditions and materials recommendations were made. Similar to air-fired operation, oxy-combustion corrosion rates were found to vary with the boiler material, test temperature, deposit composition, and gas composition. Despite this, comparison of air-fired and oxy-fired corrosion rates showed that oxy-firing rates were, for the most part, similar to, if not lower than those of air-firing; this finding applied to the seven furnace waterwall materials (wrought and weld overlay) and the ten superheater/reheater materials (wrought and weld overlay) that were tested. The results of the laboratory oxy-combustion tests, which are based on a maximum bulk flue gas SO{sub 2} level of 3200 ppmv (wet) / 4050 ppmv (dry), suggest that, from a corrosion standpoint, the materials used in conventional subcritical and supercritical, air-fired boilers should also be suitable for oxy-combustion retrofits. Although the laboratory test results are encouraging, they are only the first step of a material evaluation process and it is recommended that follow-on corrosion tests be conducted in coal-fired boilers operating under oxy-combustion to provide longer term (one to two year) data. The test program details and data are presented herein.

Michael Gagliano; Andrew Seltzer; Hans Agarwal; Archie Robertson; Lun Wang

2012-01-31T23:59:59.000Z

315

Oxy-Combustion Boiler Material Development  

SciTech Connect (OSTI)

Under U.S. Department of Energy Cooperative Agreement No. DE-NT0005262 Foster Wheeler North America Corp conducted a laboratory test program to determine the effect of oxy-combustion on boiler tube corrosion. In this program, CFD modeling was used to predict the gas compositions that will exist throughout and along the walls of air-fired and oxy-fired boilers operating with low to high sulfur coals. Test coupons of boiler tube materials were coated with deposits representative of those coals and exposed to the CFD predicted flue gases for up to 1000 hours. The tests were conducted in electric tube furnaces using oxy-combustion and air-fired flue gases synthesized from pressurized cylinders. Following exposure, the test coupons were evaluated to determine the total metal wastage experienced under air and oxy-combustions conditions and materials recommendations were made. Similar to air-fired operation, oxy-combustion corrosion rates were found to vary with the boiler material, test temperature, deposit composition, and gas composition. Despite this, comparison of air-fired and oxy-fired corrosion rates showed that oxy-firing rates were, for the most part, similar to, if not lower than those of air-firing; this finding applied to the seven furnace waterwall materials (wrought and weld overlay) and the ten superheater/reheater materials (wrought and weld overlay) that were tested. The results of the laboratory oxy-combustion tests, which are based on a maximum bulk flue gas SO2 level of 3200 ppmv (wet) / 4050 ppmv (dry), suggest that, from a corrosion standpoint, the materials used in conventional subcritical and supercritical, air-fired boilers should also be suitable for oxy-combustion retrofits. Although the laboratory test results are encouraging, they are only the first step of a material evaluation process and it is recommended that follow-on corrosion tests be conducted in coal-fired boilers operating under oxy-combustion to provide longer term (one to two year) data. The test program details and data are presented herein.

Gagliano, Michael; Seltzer, Andrew; Agarwal, Hans; Robertson, Archie; Wang, Lun

2012-01-31T23:59:59.000Z

316

Black liquor combustion validated recovery boiler modeling: Final year report. Volume 3 (Appendices II, sections 2--3 and III)  

SciTech Connect (OSTI)

This project was initiated in October 1990, with the objective of developing and validating a new computer model of a recovery boiler furnace using a computational fluid dynamics (CFD) code specifically tailored to the requirements for solving recovery boiler flows, and using improved submodels for black liquor combustion based on continued laboratory fundamental studies. The key tasks to be accomplished were as follows: (1) Complete the development of enhanced furnace models that have the capability to accurately predict carryover, emissions behavior, dust concentrations, gas temperatures, and wall heat fluxes. (2) Validate the enhanced furnace models, so that users can have confidence in the predicted results. (3) Obtain fundamental information on aerosol formation, deposition, and hardening so as to develop the knowledge base needed to relate furnace model outputs to plugging and fouling in the convective sections of the boiler. (4) Facilitate the transfer of codes, black liquid submodels, and fundamental knowledge to the US kraft pulp industry. Volume 3 contains the following appendix sections: Formation and destruction of nitrogen oxides in recovery boilers; Sintering and densification of recovery boiler deposits laboratory data and a rate model; and Experimental data on rates of particulate formation during char bed burning.

Grace, T.M.; Frederick, W.J.; Salcudean, M.; Wessel, R.A.

1998-08-01T23:59:59.000Z

317

Waste minimization and pollution prevention initiatives within Argonne National Laboratory-East (ANL-E) boiler house operations  

SciTech Connect (OSTI)

The mission of ANL-E Plant Facility and Services-Utilities and Systems (PFS-US) is to operate and maintain utility services in a cost-effective manner, while utilizing new and innovative methods whenever possible. PFS-US operates an on-site coal burning boiler plant that generates steam for use throughout the Laboratory as a source to heat buildings, as well as for use in research experiments. In the recent past, PFS-US has embarked upon a series of initiatives to improve operating efficiency of boiler house operations. The results of these projects have had the following impacts on boiler house performance and operations: (1) boiler house efficiency and operations have improved, (2) boiler house operating costs have been reduced, (3) specific operating and maintenance costs have been avoided or eliminated, and (4) the amount of waste and pollution generated has been reduced. Through the implementation of these initiatives, over $250,000 of revenue and cost savings have been incurred by ANL-E. In addition, the Laboratory and DOE will benefit annually from revenues, cost savings, and the reduction of environmental liability resulting from these initiatives.

NONE

1996-08-01T23:59:59.000Z

318

Evaluation of Gas Reburning and Low-NOx Burners on a Wall-Fired Boiler; a DOE Assessment  

SciTech Connect (OSTI)

The results from the GR-LNB technology demonstrated by EER at Cherokee Station approached, but did not meet, the CCT project's performance objectives. Acceptable unit operability was achieved with both the GR and the LNB components. The gas reburning component of the process appears to be broadly applicable for retrofit NO{sub x} control to most utility boilers and, in particular, to wet-bottom cyclone boilers, which are high NO{sub x} emitters and are difficult to control (LNB technology is not applicable to cyclone boilers). GR-LNB can reduce NO{sub x} to mandated emissions levels under Title IV of the CAAA without significant, adverse boiler impacts. The GR-LNB process may be applicable to boilers significantly larger than the demonstration unit, provided there is adequate dispersion and mixing of injected natural gas. Major results of the demonstration project are summarized as follows: NO{sub x}-emissions reductions averaging 64% were achieved with 12.5% gas heat input in long-term tests on a 158-MWe (net) wall-fired unit. The target reduction level of 70% was achieved only on a short-term basis with higher gas consumption. The thermal performance of coal-fired boilers is not significantly affected by GR-LNB. Convective section steam temperatures can be controlled within acceptable limits. Thermal efficiency is decreased by a small amount (about 0.8%), because of increased dry gas loss and higher moisture in the flue gas as a result of the GR process. Furnace slagging and convective section fouling can be adequately controlled. Because of the higher hydrogen/carbon (H/C) ratio of natural gas compared with coal, use of the GR process results in a modest reduction in CO{sub 2} emissions. SO{sub 2} and particulate emissions are reduced in direct proportion to the fraction of heat supplied by natural gas.

National Energy Technology Laboratory

2001-02-28T23:59:59.000Z

319

Recovery Boiler Superheater Ash Corrosion Field Study  

SciTech Connect (OSTI)

With the trend towards increasing the energy efficiency of black liquor recovery boilers operated in North America, there is a need to utilize superheater tubes with increased corrosion resistance that will permit operation at higher temperatures and pressures. In an effort to identify alloys with improved corrosion resistance under more harsh operating conditions, a field exposure was conducted that involved the insertion of an air-cooled probe, containing six candidate alloys, into the superheater section of an operating recovery boiler. A metallographic examination, complete with corrosion scale characterization using EMPA, was conducted after a 1,000 hour exposure period. Based on the results, a ranking of alloys based on corrosion performance was obtained.

Keiser, James R [ORNL] [ORNL; Kish, Joseph [McMaster University] [McMaster University; Singbeil, Douglas [FPInnovations] [FPInnovations

2010-01-01T23:59:59.000Z

320

World Class Boilers and Steam Distribution System  

E-Print Network [OSTI]

WORLD CLASS BOILERS AND STEAM DISTRIBUTION SYSTEM Vernon P. Portell, Ph.D. Manager Armstrong Service, Inc. ABSTRACT categorizing, measuring, and comparing subjects which are of interest to us is the way we identify the "World class" is a... of information can also be obtained through an independent firm that provides third-party assessment of steam systems. One of these third parties, Armstrong Energy Certification, Inc., has used data gleaned from decades of industrial experience...

Portell, V. P.

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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Reducing NOx in Fired Heaters and Boilers  

E-Print Network [OSTI]

-6, 2000 Reducing NOx in Fired Heaters Air Pollution Control and Boilers Keeping the environment clean Presented by Ashutosh Garg Furnace Improvements Low cost solutions for fired heaters Trace compounds ? Nitric oxides ? Carbon monoxide ? Sulfur... it is essential to estimate accurately baseline NOx emissions. ? This will establish each units current compliance status. ? Emissions ? Current excess air level ? Carbon monoxide ? Combustibles ? NOx corrected to 3% 02 314 ESL-IE-00-04-46 Proceedings...

Garg, A.

322

ADVANCED, LOW/ZERO EMISSION BOILER DESIGN AND OPERATION  

SciTech Connect (OSTI)

This document reviews the work performed during the quarter July--September 2003. Significant progress has been made in Task 1 (Site Preparation), Task 2 (Test performance) and Task 3 (Techno-Economic Study) of the project: the site preparation has been completed, two weeks of tests have been performed and the power generating units to be compared from an economical standpoint have been selected and accurately described. In the experimental part of this effort (task1), the partners in this project demonstrated the feasibility of 100% air replacement with O{sub 2}-enriched flue gas on 1.5MW coal-fired boiler. The air infiltration have been reduced to approximately 5% of the stoichiometry, enabling to reach around 70% of CO{sub 2} in the flue gases. Higher air in-leakage reduction is expected using alternative boiler operating procedure in order to achieve higher CO{sub 2} concentration in flue gas for further sequestration or reuse. The NO{sub x} emissions have been shown considerably lower in O{sub 2}-fired conditions than in air-baseline, the reduction rate averaging 70%. An additional week of tests is scheduled mid October 2003 for combustion parameter optimization, and some more days of operation will be dedicated to mercury emission measurement and heat transfer characterization. Out of the $485k already allocated in this project, $300k has been spent and reported to date, mainly in site preparation ({approx}$215k) and test performance ({approx}$85k). In addition to DOE allocated funds, to date approximately $240k has been cost-shared by the participants, bringing the total project cost up to $540k as on September 30, 2003.

Fabienne Chatel-Pelage

2003-10-01T23:59:59.000Z

323

Heat Recovery Considerations for Process Heaters and Boilers  

E-Print Network [OSTI]

, regenerative air preheaters and economizers. Relative advantages and applicability of the three methods are discussed. Analytical methods and correlations are presented which enable determination of size of unit, capital cost and operating cost for each...

Kumar, A.

1982-01-01T23:59:59.000Z

324

Protecting the Investment in Heat Recovery with Boiler Economizers  

E-Print Network [OSTI]

economizer ($45,000) R = Repayment-time of investment (Months) W= Q(ht - hf) 30,000 (1196-188) 30.24 mm Btu/Hr generated H'= G (tl-t2 )SxEC 36,000 (475-300)x .27 x .98 1.667 mm Btu/Hr recovered F = H/W x 100 100 (1.667)/30.24 . 5.52% fuel saved C... = (.85~ +;40b)/2= (.85x8.33+.40x12.5)/2 $6.04/mm Btu generated FB= CTW' = 6.04 x 5000 x 30.24 = $913,248/Year FS= FB x F = 913248 x .0552 = $50,411/Year R = 12 X CI/FS 12 x 45,000/50,411 = 10.7 months ,"I'IINO-' OIL '.n/GIlL' GAS ??.OOl...

Roethe, L. A.

325

Clean Boiler Waterside Heat Transfer Surfaces | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists'Montana. DOCUMENTS AVAILABLE FORSuperior Energy5-1Denverby LAWRENCEJuly

326

Recover Heat from Boiler Blowdown | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdfEnergyDepartmentEnergy Data

327

BOILER MATERIALS FOR ULTRASUPERCRITICAL COAL POWER PLANTS  

SciTech Connect (OSTI)

The principal objective of this project is to develop materials technology for use in ultrasupercritical (USC) plant boilers capable of operating with 760 C (1400 F), 35 MPa (5000 psi) steam. This project has established a government/industry consortium to undertake a five-year effort to evaluate and develop of advanced materials that allow the use of advanced steam cycles in coal-based power plants. These advanced cycles, with steam temperatures up to 760 C, will increase the efficiency of coal-fired boilers from an average of 35% efficiency (current domestic fleet) to 47% (HHV). This efficiency increase will enable coal-fired power plants to generate electricity at competitive rates (irrespective of fuel costs) while reducing CO{sub 2} and other fuel-related emissions by as much as 29%. Success in achieving these objectives will support a number of broader goals. First, from a national prospective, the program will identify advanced materials that will make it possible to maintain a cost-competitive, environmentally acceptable coal-based electric generation option. High sulfur coals will specifically benefit in this respect by having these advanced materials evaluated in high-sulfur coal firing conditions and from the significant reductions in waste generation inherent in the increased operational efficiency. Second, from a national prospective, the results of this program will enable domestic boiler manufacturers to successfully compete in world markets for building high-efficiency coal-fired power plants.

R. Viswanathan; K. Coleman; R.W. Swindeman; J. Sarver; J. Blough; W. Mohn; M. Borden; S. Goodstine; I. Perrin

2003-10-20T23:59:59.000Z

328

Boiler tube failures in municipal waste-to-energy plants: Case histories  

SciTech Connect (OSTI)

Waste-to-energy plants experienced boiler tube failures when the design changed from waste-heat boilers to radiant furnace waterwalls with superheat, adopted from coal-firing technology. The fireside attack by chlorine and sulfur compounds in the refuse combustion products caused many forced outages in early European plants with high steam temperatures and pressures. In spite of conservative steam conditions in the first US plants, some failures occurred. As steam temperatures increased in later US plants, corrosion problems multiplied. Over the years these problems have been alleviated by covering the waterwalls with either refractories or weld overlays of nickel-base alloys and using high nickel-chromium alloys for superheater tubes. Various changes in furnace design to provide uniform combustion and avoid reducing conditions in the waterwall zone and to lower the gas temperature in the superheater also have helped to minimize corrosion.

Krause, H.H.; Wright, I.G. [Battelle, Columbus, OH (United States)

1995-12-01T23:59:59.000Z

329

Cracking and Corrosion of Composite Tubes in Black Liquor Recovery Boiler Primary Air Ports  

SciTech Connect (OSTI)

Black liquor recovery boilers are an essential part of kraft mills. Their design and operating procedures have changed over time with the goal of providing improved boiler performance. These performance improvements are frequently associated with an increase in heat flux and/or operating temperature with a subsequent increase in the demand on structural materials associated with operation at higher temperatures and/or in more corrosive environments. Improvements in structural materials have therefore been required. In most cases the alternate materials have provided acceptable solutions. However, in some cases the alternate materials have solved the original problem but introduced new issues. This report addresses the performance of materials in the tubes forming primary air port openings and, particularly, the problems associated with use of stainless steel clad carbon steel tubes and the solutions that have been identified.

Keiser, James R.; Singbeil, Douglas L.; Sarma, Gorti B.; Kish, Joseph R.; Yuan, Jerry; Frederick, Laurie A.; Choudhury, Kimberly A.; Gorog, J. Peter; Jett, Francois R.; Hubbard, Camden R.; Swindeman, Robert W.; Singh, Prett M.; Maziasz, Phillip J.

2006-10-01T23:59:59.000Z

330

Operating experience of Pyroflow boilers in a 250 MWe unit  

SciTech Connect (OSTI)

The Cedar Bay Cogeneration project is a 250 MWe unit owned and operated by US Generating Company. This plant has one turbine rated at 250 MWe net which is supplied by three Pyroflow CFB boilers that operate in parallel while supplying a paper mill with steam on an uninterruptible basis. Compared to similar size CFB boilers the Cedar Bay boilers have certain unique features. First, these are reheat boilers which must continue to supply process steam even when the steam turbine is down. Second, the SO{sub 2} control operates at a very low Ca/S molar ratio by optimizing the process conditions and flyash reinjection. Third, the NO{sub x} reduction process utilizes aqueous ammonia injection. This paper presents the operating data at full load in terms of boiler efficiency, and the ability to limit gaseous emissions with minimum limestone and ammonia usage. Unique features relating to the multiple boiler installation are also discussed.

Chelian, P.K.; Hyvarinen, K. [Pyropower Corp., San Diego, CA (United States)

1995-12-31T23:59:59.000Z

331

Gas reburning in tangentially-fired, wall-fired and cyclone-fired boilers  

SciTech Connect (OSTI)

Gas Reburning has been successfully demonstrated for over 4,428 hours on three coal fired utility boilers as of March 31, 1994. Typically, NO{sub x} reductions have been above 60% in long-term, load-following operation. The thermal performance of the boilers has been virtually unaffected by Gas Reburning. At Illinois Power`s Hennepin Station, Gas Reburning in a 71 MWe tangentially-fired boiler achieved an average NO{sub x} reduction of 67% from the original baseline NO{sub x} level of 0.75 lb NO{sub x}/10{sup 6} Btu over a one year period. The nominal natural gas input was 18% of total heat input. Even at 10% gas heat input, NO{sub x} reduction of 55% was achieved. At Public Service Company of Colorado`s Cherokee Station, a Gas Reburning-Low NO{sub x} Burner system on a 172 MWe wall-fired boiler has achieved overall NO{sub x} reductions of 60--73% in parametric and long-term testing, based on the original baseline NO{sub x} level of 0.73 lb/10{sup 6} Btu. NO{sub x} reduction is as high as 60--65% even at relatively low natural gas usage (5--10% of total heat input). The NO{sub x} reduction by Low NO{sub x} Burners alone is typically 30--40%. NO{sub x} reduction has been found to be insensitive to changes in recirculated flue gas (2--7% of total flue gas) injected with natural gas. At City Water, Light and Power Company`s Lakeside Station in Springfield, Illinois, Gas Reburning in a 33 MWe cyclone-fired boiler has achieved an average NO{sub x} reduction of 66% (range 52--77%) at gas heat inputs of 20--26% in long-term testing, based on a baseline NO{sub x} level of 1.0 lb/10{sup 6} Btu (430 mg/MJ). This paper presents a summary of the operating experience at each site and discusses the long term impacts of applying this technology to units with tangential, cyclone and wall-fired (with Low NO{sub x} Burner) configurations.

May, T.J. [Illinois Power Co., Decatur, IL (United States); Rindahl, E.G. [Public Service Co. of Colorado, Denver, CO (United States); Booker, T. [City Water Light and Power, Springfield, IL (United States)] [and others

1994-12-31T23:59:59.000Z

332

Measure Guideline: Condensing Boilers - Optimizing Efficiency and Response Time During Setback Operation  

SciTech Connect (OSTI)

Conventional wisdom surrounding space heating has told us a couple of things consistently for several years now: size the mechanical systems to the heating loads and setting the thermostat back at night will result in energy savings. The problem is these two recommendations oppose each other. A system that is properly sized to the heating load will not have the extra capacity necessary to recover from a thermostat setback, especially at design conditions. The implication of this is that, for setback to be successfully implemented, the heating system must be oversized. This issue is exacerbated further when an outdoor reset control is used with a condensing boiler, because not only is the system matched to the load at design, the outdoor reset control matches the output to the load under varying outdoor temperatures. Under these circumstances, the home may never recover from setback. Special controls to bypass the outdoor reset sensor are then needed. Properly designing a hydronic system for setback operation can be accomplished but depends on several factors. Determining the appropriateness of setback for a particular project is the first step. This is followed by proper sizing of the boiler and baseboard to ensure the needed capacity can be met. Finally, control settings must be chosen that result in the most efficient and responsive performance. This guide provides step by step instructions for heating contractors and hydronic designers for selecting the proper control settings to maximize system performance and improve response time when using a thermostat setback.

Arena, L.

2014-02-01T23:59:59.000Z

333

Build, Own, Operate and Maintain (BOOM) Boiler Systems  

E-Print Network [OSTI]

Build, Own, Operate and Maintain (BOOM) Boiler Systems Tom Henry, Annstrong Service, Inc. Overview: The article addresses the growing trend in outsourcing boiler equipment, installation, operation, maintenance and ownership by large.... In most cases, thennal, electric and air energy systems are not considered "core" assets resulting in the need to find "other" solutions to providing the needed energy. ? Reduced staffing has resulted in fewer experienced and knowledgeable boiler...

Henry, T.

334

HEAT ROADMAP EUROPE 2050 SECOND PRE-STUDY FOR THE EU27  

E-Print Network [OSTI]

Research Centre for 4th Generation District Heating (4DH), which has received funding from The Danish. However, this pre-study outlines the previously unconsidered potential of district heating and cooling requirements of district heating and cooling as technologies. The authors intend to continue developing

Kolaei, Alireza Rezania

335

Modeling of a Drum Boiler Using MATLAB/Simulink.  

E-Print Network [OSTI]

?? A dynamic simulator was developed for a natural circulation drum type boiler through a joint Youngstown State University/The Babcock and Wilcox Company cooperative agreement. (more)

Anderson, Scott B.

2008-01-01T23:59:59.000Z

336

FEMP Technology Brief: Boiler Combustion Control and Monitoring System  

Broader source: Energy.gov [DOE]

There are more than 45,000 industrial and commercial boilers larger than 10 MMBtu/hr in the United States with a total fuel input capacity of 2.7 million MMBtu/hr. Efficiency of existing boilers can be improved in three ways; replacement with new boilers, replacement of the burner, or installation of a combustion control system. While installation of a new boiler or replacement of the burner can lead to the greatest efficiency gains, the higher costs associated with these measures typically leads to longer payback periods than combustion control systems.

337

Apparatus for reducing the moisture content in combustible material by utilizing the heat from combustion of such material  

SciTech Connect (OSTI)

This patent describes apparatus for preparing moisture containing fuel material for combustion to produce heat energy and for applying the heat energy from the combustion for lowering the moisture content in the fuel material prior to combustion, the improvement comprising: boiler means for the combustion of the fuel material to produce heat energy, grinding apparatus for preparing the fuel material to produce heat energy; means for collecting prepared fuel material and for feeding the collected fuel material to the boiler means; a main gaseous fluid and fuel material conduit system; a second conduit system connecting the boiler means and the grinding apparatus to conduct heat energy to the grinding apparatus; connecting means between the returning side of the main conduit system and the boiler means for maintaining the main conduit system at a negative pressure to promote the flow of hot gaseous medium from the boiler means to the gringing apparatus.

Williams, R.M.

1992-03-17T23:59:59.000Z

338

A centurial history of technological change and learning curves or pulverized coal-fired utility boilers  

E-Print Network [OSTI]

allow ultra-supercritical boilers to achieve still higherthat supercritical-coal boilers, at least in the 1970s, didGW/year) by type of boiler. Source: [25]. Net Efficiency (

Yeh, Sonia; Rubin, Edward

2007-01-01T23:59:59.000Z

339

Robust Output Feedback Stabilization of Nonlinear Interconnected Systems with Application to an Industrial Utility Boiler  

E-Print Network [OSTI]

to an Industrial Utility Boiler Adarsha Swarnakar, Horacio Jose Marquez and Tongwen Chen Abstract-- This paper boiler (Utility boiler), where the nonlinear model describes the complicated dynamics of the drum

Marquez, Horacio J.

340

Life-cycle cost analysis of energy efficiency design options for residential furnaces and boilers  

E-Print Network [OSTI]

9 Hot-Water Oil Boiler LCC Analysis-Efficiency Levels and10 Hot-Water Gas Boiler LCC Analysis-Efficiency Levels andfurnace and boiler energy-efficiency standards. Determining

Lutz, James; Lekov, Alex; Whitehead, Camilla Dunham; Chan, Peter; Meyers, Steve; McMahon, James

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Compare All CBECS Activities: District Heat Use  

Gasoline and Diesel Fuel Update (EIA)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) " ,"ClickPipelines About U.S.30Natural Gas Glossary529 633 622 56623 4623 42 180Number of BuildingsNumber

342

Black liquor combustion validated recovery boiler modeling: Final year report. Volume 2 (Appendices I, section 5 and II, section 1)  

SciTech Connect (OSTI)

This project was initiated in October 1990, with the objective of developing and validating a new computer model of a recovery boiler furnace using a computational fluid dynamics (CFD) code specifically tailored to the requirements for solving recovery boiler flows, and using improved submodels for black liquor combustion based on continued laboratory fundamental studies. The key tasks to be accomplished were as follows: (1) Complete the development of enhanced furnace models that have the capability to accurately predict carryover, emissions behavior, dust concentrations, gas temperatures, and wall heat fluxes. (2) Validate the enhanced furnace models, so that users can have confidence in the predicted results. (3) Obtain fundamental information on aerosol formation, deposition, and hardening so as to develop the knowledge base needed to relate furnace model outputs to plugging and fouling in the convective sections of the boiler. (4) Facilitate the transfer of codes, black liquid submodels, and fundamental knowledge to the US kraft pulp industry. Volume 2 contains the last section of Appendix I, Radiative heat transfer in kraft recovery boilers, and the first section of Appendix II, The effect of temperature and residence time on the distribution of carbon, sulfur, and nitrogen between gaseous and condensed phase products from low temperature pyrolysis of kraft black liquor.

Grace, T.M.; Frederick, W.J.; Salcudean, M.; Wessel, R.A.

1998-08-01T23:59:59.000Z

343

Characterization of Oxy-combustion Impacts in Existing Coal-fired Boilers  

SciTech Connect (OSTI)

Reaction Engineering International (REI) managed a team of experts from University of Utah, Siemens Energy, Praxair, Vattenfall AB, Sandia National Laboratories, Brigham Young University (BYU) and Corrosion Management Ltd. to perform multi-scale experiments, coupled with mechanism development, process modeling and CFD modeling, for both applied and fundamental investigations. The primary objective of this program was to acquire data and develop tools to characterize and predict impacts of CO{sub 2} flue gas recycle and burner feed design on flame characteristics (burnout, NO{sub x}, SO{sub x}, mercury and fine particle emissions, heat transfer) and operational concerns (fouling, slagging and corrosion) inherent in the retrofit of existing coal-fired boilers for oxy-coal combustion. Experimental work was conducted at Sandia National Laboratories Entrained Flow Reactor, the University of Utah Industrial Combustion Research Facility, and Brigham Young University. Process modeling and computational fluid dynamics (CFD) modeling was performed at REI. Successful completion of the project objectives resulted in the following key deliverables: 1) Multi-scale test data from 0.1 kW bench-scale, 100 kW and 200 kW laboratory-scale, and 1 MW semi-industrial scale combustors that describe differences in flame characteristics, fouling, slagging and corrosion for coal combustion under air-firing and oxygen-firing conditions, including sensitivity to oxy-burner design and flue gas recycle composition. 2) Validated mechanisms developed from test data that describe fouling, slagging, waterwall corrosion, heat transfer, char burnout and sooting under coal oxy-combustion conditions. The mechanisms were presented in a form suitable for inclusion in CFD models or process models. 3) Principles to guide design of pilot-scale and full-scale coal oxy-firing systems and flue gas recycle configurations, such that boiler operational impacts from oxy-combustion retrofits are minimized. 4) Assessment of oxy-combustion impacts in two full-scale coal-fired utility boiler retrofits based on computational fluid dynamics (CFD) modeling of air-fired and oxygen-fired operation. This research determined that it is technically feasible to retrofit the combustion system in an air-fired boiler for oxy-fired operation. The impacts of CO{sub 2} flue gas recycle and burner design on flame characteristics (burnout, NO{sub x}, SO{sub x}, mercury and fine particle emissions, heat transfer) and operational concerns (fouling, slagging and corrosion) were minimal, with the exception of high sulfur levels resulting from untreated flue gas recycle with medium and high-sulfur coals. This work focused on combustion in the radiant and convective sections of the boiler and did not address boiler system integration issues, plant efficiencies, impacts on downstream air pollution control devices, or CO{sub 2} capture and compression. The experimental data, oxy-firing system principles and oxy-combustion process mechanisms provided by this work can be used by electric utilities, boiler OEMs, equipment suppliers, design firms, software vendors, consultants and government agencies to assess retrofit applications of oxy-combustion technologies to existing boilers and to guide development of new designs.

Adams, Bradley; Davis, Kevin; Senior, Constance; Shim, Hong Shim; Otten, Brydger; Fry, Andrew; Wendt, Jost; Eddings, Eric; Paschedag, Alan; Shaddix, Christopher; Cox, William; Tree, Dale

2013-09-30T23:59:59.000Z

344

Low NO{sub x}/SO{sub x} Burner retrofit for utility cyclone boilers. Quarterly technical progress report, October--December 1990  

SciTech Connect (OSTI)

Cyclone furnaces operate with high excess air and at high temperature. The heat release during combustion is very high and as a result the boiler volume is much smaller than would be found in a conventional pc-fired system. The Marion Unit 1 boiler, at the level of the cyclone entry, has a small cross-section; about 5-feet in depth and about 20-feet in width. A boiler schematic showing the LNS Burner and relative location of the superheater region and overfire air ports is shown in Figure 1. The LNS Burner`s combustion process is fundamentally different from that of the cyclone, and the combustion products are also different. The LNS Burner products enter the boiler as hot, fuel-rich gases. Additional overfire air must be added to complete this combustion step with care taken to avoid the formation of thermal NO{sub x}. If done correctly, S0{sub 2} is controlled and significant NO{sub x} reductions are achieved. Because of the small boiler volume, flow modelling was found to be necessary to insure that adequate mixing of LNS Burner combustion products with air can be accomplished to achieve NO{sub x} emissions goals. Design requirements for the air injection system for the Marion boiler were developed using FLUENT, a commercially available computational fluid dynamics (CFD) code. A series of runs were made to obtain a design for final air injection that met the process design goals as closely as possible.

Not Available

1990-12-31T23:59:59.000Z

345

Design of a Heating System with Geothermal Energy and CO2 Capture:.  

E-Print Network [OSTI]

??Heating constitutes about 40% of the final energy consumption at TU Delft. In the present, the district heating system in campus obtains its energy from (more)

Reyes Lastiri, D.

2013-01-01T23:59:59.000Z

346

Characterization of the U.S. Industrial/Commercial Boiler Population...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Characterization of the U.S. IndustrialCommercial Boiler Population - Final Report, May 2005 Characterization of the U.S. IndustrialCommercial Boiler Population - Final Report,...

347

Advances of flue gas desulfurization technology for coal-fired boilers and strategies for sulfur dioxide pollution prevention in China  

SciTech Connect (OSTI)

Coal is one of the most important kinds of energy resources at the present time and in the immediate future in China. Sulfur dioxide resulting from combustion of coal is one of the principle pollutants in the air. Control of SO{sub 2} discharge is still a major challenge for environmental protection in developing China. In this paper, research, development and application of technology of flue gas desulfurization (FGD) for coal-fired boilers in China will be reviewed with emphasis on cost-effective technology, and the development trends of FGD technology, as well as the strategy for SO{sub 2} discharge control in China, will be analyzed. A practical technology for middle-small-sized boilers developed by the primary author and the field investigation results will also be presented. At present, there are four major kinds of FGD technologies that are practical to be applied in China for their cost-effectiveness and efficiency to middle-small-sized boilers. An important development trend of the FGD technology for middle-small-sized boilers for the next decade is improvement of the existing cost-effective wet-type FGD technology, and in the future it will be the development of dry-type FGD technology. For middle-sized generating boilers, the development direction of the FGD technology is the spraying and drying process. For large-sized generating boilers, the wet-type limestone-plaster process will still be applied in the immediate future, and dry-type FGD technologies, such as ammonia with electron beam irradiation, will be developed in the future. State strategies for the control of SO{sub 2} discharge will involve the development and popularization of efficient coal-fired devices, extension of gas coal and liquefied coal, spreading coal washing, and centralized heating systems.

Yang, C.; Zeng, G.; Li, G.; Qiu, J.

1999-07-01T23:59:59.000Z

348

Boiler Efficiency vs. Steam Quality- The Challenge of Creating Quality Steam Using Existing Boiler Efficiencies  

E-Print Network [OSTI]

A boiler works under pressure and it is not possible to see what is happening inside of it. The terms "wet steam" and "carry over" are every day idioms in the steam industry, yet very few people have ever seen these phenomena and the actual water...

Hahn, G.

349

Modification of boiler operating conditions for mercury emissions reductions in coal-fired utility boilers  

E-Print Network [OSTI]

matter and char, and cold-end air pollution control devices. There is also evidence that boiler is equipped with hot and cold precipitators and a tubular air preheater. A strategy for mercury control designated hazardous air pollutants by the US Environmental Protection Agency (EPA), mercury (Hg) has

Li, Ying

350

Development of Computational Capabilities to Predict the Corrosion Wastage of Boiler Tubes in Advanced Combustion Systems  

SciTech Connect (OSTI)

A comprehensive corrosion research project consisting of pilot-scale combustion testing and long-term laboratory corrosion study has been successfully performed. A pilot-scale combustion facility available at Brigham Young University was selected and modified to enable burning of pulverized coals under the operating conditions typical for advanced coal-fired utility boilers. Eight United States (U.S.) coals were selected for this investigation, with the test conditions for all coals set to have the same heat input to the combustor. In addition, the air/fuel stoichiometric ratio was controlled so that staged combustion was established, with the stoichiometric ratio maintained at 0.85 in the burner zone and 1.15 in the burnout zone. The burner zone represented the lower furnace of utility boilers, while the burnout zone mimicked the upper furnace areas adjacent to the superheaters and reheaters. From this staged combustion, approximately 3% excess oxygen was attained in the combustion gas at the furnace outlet. During each of the pilot-scale combustion tests, extensive online measurements of the flue gas compositions were performed. In addition, deposit samples were collected at the same location for chemical analyses. Such extensive gas and deposit analyses enabled detailed characterization of the actual combustion environments existing at the lower furnace walls under reducing conditions and those adjacent to the superheaters and reheaters under oxidizing conditions in advanced U.S. coal-fired utility boilers. The gas and deposit compositions were then carefully simulated in a series of 1000-hour laboratory corrosion tests, in which the corrosion performances of different commercial candidate alloys and weld overlays were evaluated at various temperatures for advanced boiler systems. Results of this laboratory study led to significant improvement in understanding of the corrosion mechanisms operating on the furnace walls as well as superheaters and reheaters in coal-fired boilers resulting from the coexistence of sulfur and chlorine in the fuel. A new corrosion mechanism, i.e., Active Sulfidation Corrosion Mechanism, has been proposed to account for the accelerated corrosion wastage observed on the furnace walls of utility boilers burning coals containing sulfur and chlorine. In addition, a second corrosion mechanism, i.e., Active Sulfide-to-Oxide Corrosion Mechanism, has been identified to account for the rapid corrosion attack on superheaters and reheaters. Both of the newly discovered corrosion mechanisms involve the formation of iron chloride (FeCl2) vapor from iron sulfide (FeS) and HCl, followed by the decomposition of FeCl2 via self-sustaining cycling reactions. For higher alloys containing sufficient chromium, the attack on superheaters and reheaters is dominated by Hot Corrosion in the presence of a fused salt. Furthermore, two stages of the hot corrosion mechanism have been identified and characterized in detail. The initiation of hot corrosion attack induced by molten sulfate leads to Stage 1 acidic fluxing and re-precipitation of the protective scale formed initially on the deposit-covered alloy surfaces. Once the protective scale is penetrated, Stage 2 Hot Corrosion is initiated, which is dominated by basic fluxing and re-precipitation of the scale in the fused salt. Based on the extensive corrosion information generated from this project, corrosion modeling was performed using non-linear regression analysis. As a result of the modeling efforts, two predictive equations have been formulated, one for furnace walls and the other for superheaters and reheaters. These first-of-the-kind equations can be used to estimate the corrosion rates of boiler tubes based on coal chemistry, alloy compositions, and boiler operating conditions for advanced boiler systems.

Kung, Steven; Rapp, Robert

2014-08-31T23:59:59.000Z

351

Materials development for ultra-supercritical boilers  

SciTech Connect (OSTI)

Progress is reported on a US Department of Energy project to develop high temperature, corrosion resistant alloys for use in ultra-supercritical steam cycles. The aim is to achieve boiler operation at 1,400{sup o}F/5,000 psi steam conditions with 47% net cycle efficiency. Most ferritic steel tested such as T92 and Save 12 showed severe corrosion. Nickel-based alloys, especially IN 740 and CCA 617, showed greatest resistance to oxidation with no evidence of exfoliation. Laboratory and in-plant tests have begun. 2 figs.

NONE

2005-09-30T23:59:59.000Z

352

Introduction to the Boiler MACT Energy Assessment Process  

E-Print Network [OSTI]

served from affected boiler(s) that are under BASFs control. Review of architectural/engineering plans, facility O&M procedures/logs, and fuel usage Review of facilitys energy management practice and provide recommendations for improvement where...

Theising, T. R.

2014-01-01T23:59:59.000Z

353

Boiler Gold Rush Prof. Johnny Brown (MATH 700)  

E-Print Network [OSTI]

Boiler Gold Rush Prof. Johnny Brown (MATH 700) jeb@math.purdue.edu #12;#12;#12;David McCullough, Jr help Always be prepared #12;Boiler Gold Rush Prof. Johnny Brown (MATH 700) jeb@math.purdue.edu #12;

Brown, Johnny E.

354

Black liquor combustion validated recovery boiler modeling: Final year report. Volume 5 (Appendix V)  

SciTech Connect (OSTI)

This project was initiated in October 1990, with the objective of developing and validating a new computer model of a recovery boiler furnace using a computational fluid dynamics (CFD) code specifically tailored to the requirements for solving recovery boiler flows, and using improved submodels for black liquor combustion based on continued laboratory fundamental studies. The key tasks to be accomplished were as follows: (1) Complete the development of enhanced furnace models that have the capability to accurately predict carryover, emissions behavior, dust concentrations, gas temperatures, and wall heat fluxes. (2) Validate the enhanced furnace models, so that users can have confidence in the predicted results. (3) Obtain fundamental information on aerosol formation, deposition, and hardening so as to develop the knowledge base needed to relate furnace model outputs to plugging and fouling in the convective sections of the boiler. (4) Facilitate the transfer of codes, black liquid submodels, and fundamental knowledge to the US kraft pulp industry. Volume 5 contains model validation simulations and comparison with data.

Grace, T.M.; Frederick, W.J.; Salcudean, M.; Wessel, R.A.

1998-08-01T23:59:59.000Z

355

Technical and economic feasibility of alternative fuel use in process heaters and small boilers  

SciTech Connect (OSTI)

The technical and economic feasibility of using alternate fuels - fuels other than oil and natural gas - in combustors not regulated by the Powerplant and Industrial Fuel Use Act of 1978 (FUA) was evaluated. FUA requires coal or alternate fuel use in most large new boilers and in some existing boilers. Section 747 of FUA authorizes a study of the potential for reduced oil and gas use in combustors not subject to the act: small industrial boilers with capacities less than 100 MMBtu/hr, and process heat applications. Alternative fuel use in combustors not regulated by FUA was examined and the impact of several measures to encourage the substitution of alternative fuels in these combustors was analyzed. The primary processes in which significant fuel savings can be achieved are identified. Since feedstock uses of oil and natural gas are considered raw materials, not fuels, feedstock applications are not examined in this analysis. The combustors evaluated in this study comprise approximately 45% of the fuel demand projected in 1990. These uses would account for more than 3.5 million barrels per day equivalent fuel demand in 1990.

Not Available

1980-02-01T23:59:59.000Z

356

A Flexural Mode Tuning Technique for Membraned Boiler Tubing  

SciTech Connect (OSTI)

Corrosion of tubing used in black-liquor recovery boilers is a major concern in all pulp and paper mills. Extensive corrosion in recovery boiler tubes can result in a significant safety and environmental hazard. Considerable plant resources are expended to inspect recovery boiler tubing. Currently, visual and ultrasonic inspections are primarily used during the annual maintenance shutdown to monitor corrosion rates and cracking of tubing. This project is developing guided acoustic waves for use on recovery boiler tubing. The feature of this acoustic technique is its cost-effectiveness in inspecting long lengths of tubes from a single inspection point. A piezoelectric or electromagnetic transducer induces guided waves into the tubes. The transducer detects fireside defects from the cold side or fireside of the tube. Cracking and thinning on recovery boiler tubes have been detected with this technique in both laboratory and field applications.

Quarry, M J; Chinn, D J; Rose, J L

2005-03-21T23:59:59.000Z

357

Black liquor combustion validated recovery boiler modeling: Final year report. Volume 1 (Main text and Appendix I, sections 1--4)  

SciTech Connect (OSTI)

This project was initiated in October 1990, with the objective of developing and validating a new computer model of a recovery boiler furnace using a computational fluid dynamics (CFD) code specifically tailored to the requirements for solving recovery boiler flows, and using improved submodels for black liquor combustion based on continued laboratory fundamental studies. The key tasks to be accomplished were as follows: (1) Complete the development of enhanced furnace models that have the capability to accurately predict carryover, emissions behavior, dust concentrations, gas temperatures, and wall heat fluxes. (2) Validate the enhanced furnace models, so that users can have confidence in the predicted results. (3) Obtain fundamental information on aerosol formation, deposition, and hardening so as to develop the knowledge base needed to relate furnace model outputs to plugging and fouling in the convective sections of the boiler. (4) Facilitate the transfer of codes, black liquid submodels, and fundamental knowledge to the US kraft pulp industry. Volume 1 contains the main body of the report and the first 4 sections of Appendix 1: Modeling of black liquor recovery boilers -- summary report; Flow and heat transfer modeling in the upper furnace of a kraft recovery boiler; Numerical simulation of black liquor combustion; and Investigation of turbulence models and prediction of swirling flows for kraft recovery furnaces.

Grace, T.M.; Frederick, W.J.; Salcudean, M.; Wessel, R.A.

1998-08-01T23:59:59.000Z

358

A new coordinated control strategy for boiler-turbine system of coal-fired power plant  

SciTech Connect (OSTI)

This paper presents the new development of the boiler-turbine coordinated control strategy using fuzzy reasoning and autotuning techniques. The boiler-turbine system is a very complex process that is a multivariable, nonlinear, slowly time-varying plant with large settling time and a lot of uncertainties. As there exist strong couplings between the main steam pressure control loop and the power output control loop in the boiler-turbine unit with large time-delay and uncertainties, automatic coordinated control of the two loops is a very challenging problem. This paper presents a new coordinated control strategy (CCS) which is organized into two levels: a basic control level and a high supervision level. Proportional-integral derivative (PID) type controllers are used in the basic level to perform basic control functions while the decoupling between two control loops can be realized in the high level. A special subclass of fuzzy inference systems, called the Gaussian partition with evenly (GPE) spaced midpoints systems, is used to self-tune the main steam pressure PID controller's parameters online based on the error signal and its first difference, aimed at overcoming the uncertainties due to changing fuel calorific value, machine wear, contamination of the boiler heating surfaces and plant modeling errors. For the large variation of operating condition, a supervisory control level has been developed by autotuning technique. The developed CCS has been implemented in a power plant in China, and satisfactory industrial operation results demonstrate that the proposed control strategy has enhanced the adaptability and robustness of the process. Indeed, better control performance and economic benefit have been achieved.

Li, S.Y.; Liu, H.B.; Cai, W.J.; Soh, Y.C.; Xie, L.H. [Shanghai Jiao Tong University, Shanghai (China)

2005-11-01T23:59:59.000Z

359

Evaluation of gas-reburning and low NO sub x burners on a wall fired boiler  

SciTech Connect (OSTI)

This clean coal technology project will demonstrate a combination of two developed technologies to reduce both NO{sub x} and (to some extent) SO{sub x} emissions: Gas reburning and low NO{sub x} burners. The demonstrations will be conducted on a pre-NSPS utility boiler representative of US boilers that contribute significantly to the inventory of acid rain precursor emissions: a wall fired unit. Low NO{sub x} burners operate on the principle of delayed mixing between the coal fuel and burner air, so that less NO{sub x} is burned. Gas reburning is a combustion modification technique that consists of firing 80--85 percent of the fuel corresponding to the total heat release in the lower furnace. Reduction of NO{sub x} to molecular nitrogen (N{sub 2}) is accomplished via the downstream injection of the remaining fuel requirement in the form of natural gas (which also reduces the total SO{sub x} emissions). In a third stage, burnout air is injected at lower temperatures in the upper furnace to complete the combustion process without generating significant additional NO{sub x}. The specific goal of this project is to demonstrate NO{sub x} and SO{sub x} emission reductions of 75 percent or more as a result of combining LNB and GR to a utility boiler having the design characteristics mentioned above. A Host Site Agreement has been signed by EER and a utility company in the State of Colorado: Public Service Company of Colorado (Cherokee Unit No. 3, 172 MW{sub e}) front wall fired boiler near Denver.

Not Available

1991-04-26T23:59:59.000Z

360

Black Liquor Combustion Validated Recovery Boiler Modeling, Final Year Report, Volume 5: Appendix V  

SciTech Connect (OSTI)

This project was initiated in October 1990 with the objective of developing and validating a new computer model of a recovery boiler furnace using a computational fluid dynamics (CFD) code specifically tailored to the requirements for solving recovery boiler flows, and using improved submodels for black liquor combustion based on continued laboratory fundamental studies. Many of these objectives were accomplished at the end of the first five years and documented in a comprehensive report on that work (DOE/CE/40936-T3, 1996). A critical review of recovery boiler modeling, carried out in 1995, concluded that further enhancements of the model were needed to make reliable predictions of key output variables. In addition, there was a need for sufficient understanding of fouling and plugging processes to allow model outputs to be interpreted in terms of the effect on plugging and fouling. As a result, the project was restructured and reinitiated at the end of October 1995, and was completed in June 1997. The entire project is now complete and this report summarizes all of the work done on the project since it was restructured. The key tasks to be accomplished under the restructured project were to (1) Complete the development of enhanced furnace models that have the capability to accurately predict carryover, emissions behavior, dust concentrations, gas temperatures, and wall heat fluxes; (2) Validate the enhanced furnace models, so that users can have confidence in the results; (3) Obtain fundamental information on aerosol formation, deposition, and hardening so as to develop the knowledge base needed to relate furnace model outputs to plugging and fouling in the convective sections of the boiler; and (4) Facilitate the transfer of codes, black liquor submodels, and fundamental knowledge to the U.S. kraft pulp industry.

Grace, T.M.; Frederick, W.J.; Salcudean, M.; Wessel, R.A.

1998-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Black Liquor Combustion Validated Recovery Boiler Modeling, Final Year Report, Volume 4: Appendix IV  

SciTech Connect (OSTI)

This project was initiated in October 1990 with the objective of developing and validating a new computer model of a recovery boiler furnace using a computational fluid dynamics (CFD) code specifically tailored to the requirements for solving recovery boiler flows, and using improved submodels for black liquor combustion based on continued laboratory fundamental studies. Many of these objectives were accomplished at the end of the first five years and documented in a comprehensive report on that work (DOE/CE/40936-T3, 1996). A critical review of recovery boiler modeling, carried out in 1995, concluded that further enhancements of the model were needed to make reliable predictions of key output variables. In addition, there was a need for sufficient understanding of fouling and plugging processes to allow model outputs to be interpreted in terms of the effect on plugging and fouling. As a result, the project was restructured and reinitiated at the end of October 1995, and was completed in June 1997. The entire project is now complete and this report summarizes all of the work done on the project since it was restructured. The key tasks to be accomplished under the restructured project were to (1) Complete the development of enhanced furnace models that have the capability to accurately predict carryover, emissions behavior, dust concentrations, gas temperatures, and wall heat fluxes; (2) Validate the enhanced furnace models, so that users can have confidence in the results; (3) Obtain fundamental information on aerosol formation, deposition, and hardening so as to develop the knowledge base needed to relate furnace model outputs to plugging and fouling in the convective sections of the boiler; and (4) Facilitate the transfer of codes, black liquor submodels, and fundamental knowledge to the U.S. kraft pulp industry.

Grace, T.M.; Frederick, W.J.; Salcudean, M.; Wessel, R.A.

1998-08-01T23:59:59.000Z

362

Water Resource Districts (North Dakota)  

Broader source: Energy.gov [DOE]

Water Resource Districts are created throughout the state of North Dakota to manage, conserve, protect, develop, and control water resources. Each District will be governed by a Water Resource...

363

Forestry Policies (District of Columbia)  

Broader source: Energy.gov [DOE]

Forest policy and guidelines in Washington D.C. are focused on urban forestry, and are managed by the District Department of Transportation's Urban Forestry Administration. In 2010 The District...

364

Establishing an energy efficiency recommendation for commercial boilers  

SciTech Connect (OSTI)

To assist the federal government in meeting its energy reduction goals, President Clinton's Executive Order 12902 established the Procurement Challenge, which directed all federal agencies to purchase equipment within the top 25th percentile of efficiency. Under the direction of DOE's Federal Energy Management Program (FEMP), the Procurement Challenge's goal is to create efficiency recommendations for all energy-using products that could substantially impact the government's energy reduction goals, like commercial boilers. A typical 5,000,000 Btuh boiler, with a thermal efficiency of 83.2%, can have lifetime energy cost savings of $40,000 when compared to a boiler with a thermal efficiency of 78%. For the federal market, which makes up 2% of the boiler market, this means lifetime energy cost savings of over $25,600,000. To establish efficiency recommendations, FEMP uses standardized performance ratings for products sold in the marketplace. Currently, the boiler industry uses combustion efficiency and, sometimes, thermal efficiency performance measures when specifying a commercial boiler. For many years, the industry has used these efficiency measures interchangeably, causing confusion about boiler performance measurements, and making it difficult for FEMP to establish the top 25th percentile of efficiency. This paper will illustrate the method used to establish FEMP's recommendation for boilers. The method involved defining a correlation between thermal and combustion efficiency among boiler classifications; using the correlation to model a data set of all the boiler types available in the market; and identifying how the correlation affected the top 25th percentile analysis. The paper also will discuss the applicability of this method for evaluating other equipment for which there are limited data on performance ratings.

Ware, Michelle J.

2000-08-01T23:59:59.000Z

365

Boiler Materials for Ultrasupercritical Coal Power Plants  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than current generation of supercritical plants. This increased efficiency is expected to be achieved principally through the use of ultrasupercritical steam conditions (USC). A limiting factor in this can be the materials of construction. The project goal is to assess/develop materials technology that will enable achieving turbine throttle steam conditions of 760 C (1400 F)/35 MPa (5000 psi). This goal seems achievable based on a preliminary assessment of material capabilities. The project is further intended to build further upon the alloy development and evaluation programs that have been carried out in Europe and Japan. Those programs have identified ferritic steels capable of meeting the strength requirements of USC plants up to approximately 620 C (1150 F) and nickel-based alloys suitable up to 700 C (1300 F). In this project, the maximum temperature capabilities of these and other available high-temperature alloys are being assessed to provide a basis for materials selection and application under a range of conditions prevailing in the boiler. This report provides a quarterly status report for the period of October 1 to December 30, 2005.

R. Viswanathan; K. Coleman; J. Shingledecker; J. Sarver; G. Stanko; M. Borden; W. Mohn; S. Goodstine; I. Perrin

2006-01-31T23:59:59.000Z

366

BOILER MATERIALS FOR ULTRASUPERCRITICAL COAL POWER PLANTS  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than current generation of supercritical plants. This increased efficiency is expected to be achieved principally through the use of ultrasupercritical steam conditions (USC). The project goal initially was to assess/develop materials technology that will enable achieving turbine throttle steam conditions of 760 C (1400 F)/35 MPa (5000 psi), although this goal for the main steam temperature had to be revised down to 732 C (1350 F), based on a preliminary assessment of material capabilities. The project is intended to build further upon the alloy development and evaluation programs that have been carried out in Europe and Japan. Those programs have identified ferritic steels capable of meeting the strength requirements of USC plants up to approximately 620 C (1150 F) and nickel-based alloys suitable up to 700 C (1300 F). In this project, the maximum temperature capabilities of these and other available high-temperature alloys are being assessed to provide a basis for materials selection and application under a range of conditions prevailing in the boiler. This report provides a quarterly status report for the period of July 1 to September 30, 2004.

R. Viswanathan; K. Coleman; J. Shingledecker; J. Sarver; G. Stanko; M. Borden; W. Mohn; S. Goodstine; I. Perrin

2005-04-27T23:59:59.000Z

367

Boiler Materials for Ultrasupercritical Coal Power Plants  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than current generation of supercritical plants. This increased efficiency is expected to be achieved principally through the use of ultrasupercritical steam conditions (USC). The project goal initially was to assess/develop materials technology that will enable achieving turbine throttle steam conditions of 760 C (1400 F)/35 MPa (5000 psi), although this goal for the main steam temperature had to be revised down to 732 C (1350 F), based on a preliminary assessment of material capabilities. The project is intended to build further upon the alloy development and evaluation programs that have been carried out in Europe and Japan. Those programs have identified ferritic steels capable of meeting the strength requirements of USC plants up to approximately 620 C (1150 F) and nickel-based alloys suitable up to 700 C (1300 F). In this project, the maximum temperature capabilities of these and other available high-temperature alloys are being assessed to provide a basis for materials selection and application under a range of conditions prevailing in the boiler. This report provides a quarterly status report for the period of July 1 to September 30, 2004.

R. Viswanathan; J. Sarver; M. Borden; K. Coleman; J. Blough; S. Goodstine; R.W. Swindeman; W. Mohn; I. Perrin

2003-04-21T23:59:59.000Z

368

BOILER MATERIALS FOR ULTRASUPERCRITICAL COAL POWER PLANTS  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than current generation of supercritical plants. This increased efficiency is expected to be achieved principally through the use of ultrasupercritical steam conditions (USC). A limiting factor in this can be the materials of construction. The project goal is to assess/develop materials technology that will enable achieving turbine throttle steam conditions of 760 C (1400 F)/35 MPa (5000 psi). This goal seems achievable based on a preliminary assessment of material capabilities. The project is further intended to build further upon the alloy development and evaluation programs that have been carried out in Europe and Japan. Those programs have identified ferritic steels capable of meeting the strength requirements of USC plants up to approximately 620 C (1150 F) and nickel-based alloys suitable up to 700 C (1300 F). In this project, the maximum temperature capabilities of these and other available high-temperature alloys are being assessed to provide a basis for materials selection and application under a range of conditions prevailing in the boiler. This report provides a quarterly status report for the period of April 1 to June 30, 2005.

R. Viswanathan; K. Coleman; J. Shingledecker; J. Sarver; G. Stanko; M. Borden; W. Mohn; S. Goodstine; I. Perrin

2005-08-01T23:59:59.000Z

369

Boiler Materials For Ultrasupercritical Coal Power Plants  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than current generation of supercritical plants. This increased efficiency is expected to be achieved principally through the use of ultrasupercritical steam conditions (USC). A limiting factor in this can be the materials of construction. The project goal is to assess/develop materials technology that will enable achieving turbine throttle steam conditions of 760 C (1400 F)/35 MPa (5000 psi). This goal seems achievable based on a preliminary assessment of material capabilities. The project is further intended to build further upon the alloy development and evaluation programs that have been carried out in Europe and Japan. Those programs have identified ferritic steels capable of meeting the strength requirements of USC plants up to approximately 620 C (1150 F) and nickel-based alloys suitable up to 700 C (1300 F). In this project, the maximum temperature capabilities of these and other available high-temperature alloys are being assessed to provide a basis for materials selection and application under a range of conditions prevailing in the boiler. This report provides a quarterly status report for the period of July 1 to September 30, 2006.

R. Viswanathan; K. Coleman; J. Shingledecker; J. Sarver; G. Stanko; M. Borden; W. Mohn; S. Goodstine; I. Perrin

2006-09-30T23:59:59.000Z

370

Boiler Materials for Ultrasupercritical Coal Power Plants  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than current generation of supercritical plants. This increased efficiency is expected to be achieved principally through the use of ultrasupercritical steam conditions (USC). A limiting factor in this can be the materials of construction. The project goal is to assess/develop materials technology that will enable achieving turbine throttle steam conditions of 760 C (1400 F)/35 MPa (5000 psi). This goal seems achievable based on a preliminary assessment of material capabilities. The project is further intended to build further upon the alloy development and evaluation programs that have been carried out in Europe and Japan. Those programs have identified ferritic steels capable of meeting the strength requirements of USC plants up to approximately 620 C (1150 F) and nickel-based alloys suitable up to 700 C (1300 F). In this project, the maximum temperature capabilities of these and other available high-temperature alloys are being assessed to provide a basis for materials selection and application under a range of conditions prevailing in the boiler. This report provides a quarterly status report for the period of April 1 to June 30, 2006.

R. Viswanathan; K. Coleman; J. Shingledecker; J. Sarver; G. Stanko; M. Borden; W. Mohn; S. Goodstine; I. Perrin

2006-07-17T23:59:59.000Z

371

Boiler Materials for Ultrasupercritical Coal Power Plants  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than current generation of supercritical plants. This increased efficiency is expected to be achieved principally through the use of ultrasupercritical steam conditions (USC). A limiting factor in this can be the materials of construction. The project goal is to assess/develop materials technology that will enable achieving turbine throttle steam conditions of 760 C (1400 F)/35 MPa (5000 psi). This goal seems achievable based on a preliminary assessment of material capabilities. The project is further intended to build further upon the alloy development and evaluation programs that have been carried out in Europe and Japan. Those programs have identified ferritic steels capable of meeting the strength requirements of USC plants up to approximately 620 C (1150 F) and nickel-based alloys suitable up to 700 C (1300 F). In this project, the maximum temperature capabilities of these and other available high-temperature alloys are being assessed to provide a basis for materials selection and application under a range of conditions prevailing in the boiler. This report provides a quarterly status report for the period of January 1 to March 31, 2006.

R. Viswanathan; K. Coleman; J. Shingledecker; J. Sarver; G. Stanko; M. Borden; W. Mohn; S. Goodstine; I. Perrin

2006-04-20T23:59:59.000Z

372

BOILER MATERIALS FOR ULTRASUPERCRITICAL COAL POWER PLANTS  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than current generation of supercritical plants. This increased efficiency is expected to be achieved principally through the use of ultrasupercritical steam conditions (USC). A limiting factor in this can be the materials of construction. The project goal is to assess/develop materials technology that will enable achieving turbine throttle steam conditions of 760 C (1400 F)/35 MPa (5000 psi). This goal seems achievable based on a preliminary assessment of material capabilities. The project is further intended to build further upon the alloy development and evaluation programs that have been carried out in Europe and Japan. Those programs have identified ferritic steels capable of meeting the strength requirements of USC plants up to approximately 620 C (1150 F) and nickel-based alloys suitable up to 700 C (1300 F). In this project, the maximum temperature capabilities of these and other available high-temperature alloys are being assessed to provide a basis for materials selection and application under a range of conditions prevailing in the boiler. This report provides a quarterly status report for the period of July 1 to September 30, 2005.

R. Viswanathan; K. Coleman; J. Shingledecker; J. Sarver; G. Stanko; M. Borden; W. Mohn; S. Goodstine; I. Perrin

2005-10-27T23:59:59.000Z

373

BOILER MATERIALS FOR ULTRASUPERCRITICAL COAL POWER PLANTS  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than current generation of supercritical plants. This increased efficiency is expected to be achieved principally through the use of ultrasupercritical steam conditions (USC). The project goal initially was to assess/develop materials technology that will enable achieving turbine throttle steam conditions of 760 C (1400 F)/35 MPa (5000 psi), although this goal for the main steam temperature had to be revised down to 732 C (1350 F), based on a preliminary assessment of material capabilities. The project is intended to build further upon the alloy development and evaluation programs that have been carried out in Europe and Japan. Those programs have identified ferritic steels capable of meeting the strength requirements of USC plants up to approximately 620 C (1150 F) and nickel-based alloys suitable up to 700 C (1300 F). In this project, the maximum temperature capabilities of these and other available high-temperature alloys are being assessed to provide a basis for materials selection and application under a range of conditions prevailing in the boiler. This report provides a quarterly status report for the period of October 1 to December 30, 2003.

R. Viswanathan; K. Coleman; J. Shingledecker; J. Sarver; G. Stanko; W. Mohn; M. Borden; S. Goodstine; I. Perrin

2004-04-23T23:59:59.000Z

374

BOILER MATERIALS FOR ULTRASUPERCRITICAL COAL POWER PLANTS  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than current generation of supercritical plants. This increased efficiency is expected to be achieved principally through the use of ultrasupercritical steam conditions (USC). The project goal initially was to assess/develop materials technology that will enable achieving turbine throttle steam conditions of 760 C (1400 F)/35 MPa (5000 psi), although this goal for the main steam temperature had to be revised down to 732 C (1350 F), based on a preliminary assessment of material capabilities. The project is intended to build further upon the alloy development and evaluation programs that have been carried out in Europe and Japan. Those programs have identified ferritic steels capable of meeting the strength requirements of USC plants up to approximately 620 C (1150 F) and nickel-based alloys suitable up to 700 C (1300 F). In this project, the maximum temperature capabilities of these and other available high-temperature alloys are being assessed to provide a basis for materials selection and application under a range of conditions prevailing in the boiler. This report provides a quarterly status report for the period of October 1 to December 30, 2003.

K. Coleman; R. Viswanathan; J. Shingledecker; J. Sarver; G. Stanko; W. Mohn; M. Borden; S. Goodstine; I. Perrin

2004-01-23T23:59:59.000Z

375

BOILER MATERIALS FOR ULTRASUPERCRITICAL COAL POWER PLANTS  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than current generation of supercritical plants. This increased efficiency is expected to be achieved principally through the use of ultrasupercritical steam conditions (USC). The project goal initially was to assess/develop materials technology that will enable achieving turbine throttle steam conditions of 760 C (1400 F)/35 MPa (5000 psi), although this goal for the main steam temperature had to be revised down to 732 C (1350 F), based on a preliminary assessment of material capabilities. The project is intended to build further upon the alloy development and evaluation programs that have been carried out in Europe and Japan. Those programs have identified ferritic steels capable of meeting the strength requirements of USC plants up to approximately 620 C (1150 F) and nickel-based alloys suitable up to 700 C (1300 F). In this project, the maximum temperature capabilities of these and other available high-temperature alloys are being assessed to provide a basis for materials selection and application under a range of conditions prevailing in the boiler. This report provides a quarterly status report for the period of July 1 to September 30, 2004.

R. Viswanathan; K. Coleman; J. Shingledecker; J. Sarver; G. Stanko; M. Borden; W. Mohn; S. Goodstine; I. Perrin

2005-01-31T23:59:59.000Z

376

Sulphidation resistance of composite boiler tube materials  

SciTech Connect (OSTI)

A lab-based testing program was undertaken to generate data to better define the sulphidation resistance of composite tubes installed in the lower-furnace section of black liquor recovery boilers. All composite tube cladding alloys tested were observed to have an acceptable corrosion rate at normal operating temperatures (up to 400 C) in the synthetic lower-furnace gaseous environment tested (1% H{sub 2}S-99% N{sub 2}). This acceptable corrosion resistance is due to the expected formation of a relatively protective chromium-rich inner sulphide scale. An increase in temperature up to 560 C was found to significantly increase the corrosion rate. Of the various alloys tested, Alloy HR11N exhibited the lowest corrosion rate at each of the three temperatures tested. Moreover, the corrosion rate was found not to be strongly dependent on the fabrication route (weld overlay versus co-extruded). To minimize corrosion, operating conditions that promote prolonged exposure to elevated temperatures in the lower-furnace section of black liquor recovery boilers should be avoided, regardless of the type of composite tube installed.

Kish, Joseph [McMaster University; Eng, Philip [FPInnovations; Singbeil, Douglas [FPInnovations; Keiser, James R [ORNL

2008-01-01T23:59:59.000Z

377

Evaluation of Gas Reburning and Low N0x Burners on a Wall Fired Boiler  

SciTech Connect (OSTI)

Under the U.S. Department of Energy's Clean Coal Technology Program (Round 3), a project was completed to demonstrate control of boiler NOX emissions and to a lesser degree, due to coal replacement, SO2 emissions. The project involved combining Gas Reburning with Low NOX Burners (GR-LNB) on a coal-fired electric utility boiler to determine if high levels of NO, reduction (70VO) could be achieved. Sponsors of the project included the U.S. Depatiment of Energy, the Gas Research Institute, Public Service Company of Colorado, Colorado Interstate Gas, Electric Power Research Institute, and the Energy and Environmental Research Corporation. The GR-LNB demonstration was petformed on Public Service Company of Colorado's (PSCO) Cherokee Unit #3, located in Denver, Colorado. This unit is a 172 MW~ wall-fired boiler that uses Colorado bituminous, low-sulfur coal. It had a baseline NO, emission level of 0.73 lb/1 OG Btu using conventional burners. Low NOX burners are designed to yield lower NOX emissions than conventional burners. However, the NOX control achieved with this technique is limited to 30-50Y0. Also, with LNBs, CO emissions can increase to above acceptable standards. Gas Reburning (GR) is designed to reduce NO, in the flue gas by staged fuel combustion. This technology involves the introduction of' natural gas into the hot furnace flue gas stream. When combined, GR and LNBs minimize NOX emissions and maintain acceptable levels of CO emissions. A comprehensive test program was completed, operating over a wide range of boiler conditions. Over 4,000 hours of operation were achieved, providing substantial data. Measurements were taken to quantify reductions in NOX emissions, the impact on boiler equipment and operability and factors influencing costs. The GR-LNB technology achieved good NO, emission reductions and the goals of the project were achieved. Although the performance of the low NOX burners (supplied by others) was less than expected, a NOX reduction of 65% was achieved at an average gas heat input of 18%. The performance goal of 70/40 reduction was met on many test runs, but at a higher reburn gas heat input. S02 emissions, based on coal replacement, were reduced by 18%.

None

1998-07-01T23:59:59.000Z

378

Sodium reflux pool-boiler solar receiver on-sun test results  

SciTech Connect (OSTI)

The efficient operation of a Stirling engine requires the application of a high heat flux to the relatively small area occupied by the heater head tubes. Previous attempts to couple solar energy to Stirling engines generally involved directly illuminating the heater head tubes with concentrated sunlight. In this study, operation of a 75-kW{sub t} sodium reflux pool-boiler solar receiver has been demonstrated and its performance characterized on Sandia's nominal 75-kW{sub t} parabolic-dish concentrator, using a cold-water gas-gap calorimeter to simulate Stirling engine operation. The pool boiler (and more generally liquid-metal reflux receivers) supplies heat to the engine in the form of latent heat released from condensation of the metal vapor on the heater head tubes. The advantages of the pool boiler include uniform tube temperature, leading to longer life and higher temperature available to the engine, and decoupling of the design of the solar absorber from the engine heater head. The two-phase system allows high input thermal flux, reducing the receiver size and losses, therefore improving system efficiency. The receiver thermal efficiency was about 90% when operated at full power and 800{degree}C. Stable sodium boiling was promoted by the addition of 35 equally spaced artificial cavities in the wetted absorber surface. High incipient boiling superheats following cloud transients were suppressed passively by the addition of small amounts of xenon gas to the receiver volume. Stable boiling without excessive incipient boiling superheats was observed under all operating conditions. The receiver developed a leak during performance evaluation, terminating the testing after accumulating about 50 hours on sun. The receiver design is reported here along with test results including transient operations, steady-state performance evaluation, operation at various temperatures, infrared thermography, x-ray studies of the boiling behavior, and a postmortem analysis.

Andraka, C E; Moreno, J B; Diver, R B; Moss, T A [Oak Ridge National Lab., TN (United States)] [Oak Ridge National Lab., TN (United States)

1992-06-01T23:59:59.000Z

379

Super low NO.sub.x, high efficiency, compact firetube boiler  

DOE Patents [OSTI]

A firetube boiler furnace having two combustion sections and an in-line intermediate tubular heat transfer section between the two combustion sections and integral to the pressure vessel. This design provides a staged oxidant combustion apparatus with separate in-line combustion chambers for fuel-rich primary combustion and fuel-lean secondary combustion and sufficient cooling of the combustion products from the primary combustion such that when the secondary combustion oxidant is added in the secondary combustion stage, the NO.sub.x formation is less than 5 ppmv at 3% O.sub.2.

Chojnacki, Dennis A.; Rabovitser, Iosif K.; Knight, Richard A.; Cygan, David F.; Korenberg, Jacob

2005-12-06T23:59:59.000Z

380

Scale-up of commercial PCFB boiler plant technology  

SciTech Connect (OSTI)

The DMEC-1 Demonstration Project will provide an 80 MWe commercial-scale demonstration of the Pressurized Circulating Fluidized Bed (PCFB) technology. Following confirmation of the PCFB design in the 80 MWe scale, the technology with be scaled to even larger commercial units. It is anticipated that the market for commercial scale PCFB plants will exist most predominantly in the utility and independent power producer (IPP) sectors. These customers will require the best possible plant efficiency and the lowest achievable emissions at competitive cost. This paper will describe the PCFB technology and the expected performance of a nominal 400 MWe PCFB power plant Illinois No. 6 coal was used as a representative fuel for the analysis. The description of the plant performance will be followed by a discussion of the scale-up of the major PCFB components such as the PCFB boiler, the pressure vessel, the ceramic filter, the coal/sorbent handling steam, the gas turbine, the heat recovery unit and the steam turbine, demonstrating the reasonableness of scale-up from demonstration plant to a nominal 400 MWe unit.

Lamar, T.W.

1993-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Estimation of radiative properties and temperature distributions in coal-fired boiler furnaces by a portable image processing system  

SciTech Connect (OSTI)

This paper presented an experimental investigation on the estimation of radiative properties and temperature distributions in a 670 t/h coal-fired boiler furnace by a portable imaging processing system. The portable system has been calibrated by a blackbody furnace. Flame temperatures and emissivities were measured by the portable system and equivalent blackbody temperatures were deduced. Comparing the equivalent blackbody temperatures measured by the portable system and the infrared pyrometer, the relative difference is less than 4%. The reconstructed pseudo-instantaneous 2-D temperature distributions in two cross-sections can disclose the combustion status inside the furnace. The measured radiative properties of particles in the furnace proved there is significant scattering in coal-fired boiler furnaces and it can provide useful information for the calculation of radiative heat transfer and numerical simulation of combustion in coal-fired boiler furnaces. The preliminary experimental results show this technology will be helpful for the combustion diagnosis in coal-fired boiler furnaces. (author)

Li, Wenhao; Lou, Chun; Sun, Yipeng; Zhou, Huaichun [State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074 Hubei (China)

2011-02-15T23:59:59.000Z

382

Energy Conservation Program: Energy Conservation Standards for Residential Boilers, Notice of Proposed Rulemaking  

Broader source: Energy.gov [DOE]

Energy Conservation Program: Energy Conservation Standards for Residential Boilers, Notice of Proposed Rulemaking

383

Decentralized robust PI controller design for an industrial boiler Batool Labibi a,*, Horacio Jose Marquez b  

E-Print Network [OSTI]

Decentralized robust PI controller design for an industrial boiler Batool Labibi a,*, Horacio Jose in revised form 23 April 2008 Accepted 23 April 2008 Keywords: Industrial utility boiler Internal model boiler, a control oriented nonlinear model for the boiler is identified. The nonlinearity of the system

Marquez, Horacio J.

384

Advanced, Low/Zero Emission Boiler Design and Operation  

SciTech Connect (OSTI)

This document reviews the work performed during the quarter April-June 2004. Task 1 (Site Preparation) had been completed 2003, along with three weeks of oxycombustion tests in Task 2 (experimental test performance) of the project. In current reporting period, the experimental testing has been completed: one additional week of tests has been performed to finalize the optimization of the combustion characteristics in O{sub 2}/CO{sub 2} environment ; two more days of testing were dedicated to mercury sampling in air-fired or O{sub 2}-fired conditions, and to characterization of heat transfer in O{sub 2} conditions vs. to air-blown conditions. Task 3 (Techno-Economic Study) has also been completed in current quarter: 250MWe, 500MWe and 1000MWe oxygen-fired PC unit have been simulated and quoted, and their performance and cost have been compared to same-capacity air-fired pulverized coal (PC) unit and IGCC. New and retrofit cases have been evaluated. The comparison has been completed in terms of capital cost, operating cost, cost of electricity and cost of CO{sub 2} avoided. The scope of task 4 (Conceptual Boiler Design) had been modified as per DOE request in previous quarter. Engineering calculations are currently in progress. Next steps include detail review of the experimental data collected during the entire testing campaign, finalization of detailed report on economic task, and reporting of the preliminary results in the boiler design task. Two papers summarizing the project main achievements have been presented at Clearwater coal conference in April 2004 (overall project results), and at the CO{sub 2} sequestration conference in May 2004 (emphasis on economics). Out of the {approx}$785k allocated DOE funds in this project, $545k have been spent to date, mainly in site preparation, test performance and economics assessment. In addition to DOE allocated funds, to date approximately $400k have been cost-shared by the participants, bringing the total project cost up to $945k as on June 30, 2004.

Fabienne Chatel-Pelage; Rajani Varagani

2004-06-30T23:59:59.000Z

385

BOILER MATERIALS FOR ULTRASUPERCRITICAL COAL POWER PLANTS  

SciTech Connect (OSTI)

The principal objective of this project is to develop materials technology for use in ultrasupercritical (USC) plant boilers capable of operating with 760 C (1400 F), and up to 5500 psi with emphasis upon 35 MPa (5000 psi) steam. In the 21st century, the world faces the critical challenge of providing abundant, cheap electricity to meet the needs of a growing global population while at the same time preserving environmental values. Most studies of this issue conclude that a robust portfolio of generation technologies and fuels should be developed to assure that the United States will have adequate electricity supplies in a variety of possible future scenarios. The use of coal for electricity generation poses a unique set of challenges. On the one hand, coal is plentiful and available at low cost in much of the world, notably in the U.S., China, and India. Countries with large coal reserves will want to develop them to foster economic growth and energy security. On the other hand, traditional methods of coal combustion emit pollutants and CO{sub 2} at high levels relative to other generation options. Maintaining coal as a generation option in the 21st century will require methods for addressing these environmental issues. This project has established a government/industry consortium to undertake a five-year effort to evaluate and develop advanced materials that allow the use of advanced steam cycles in coal-based power plants. These advanced cycles, with steam temperatures up to 760 C, will increase the efficiency of coal-fired boilers from an average of 35% efficiency (current domestic fleet) to 47% (HHV). This efficiency increase will enable coal-fired power plants to generate electricity at competitive rates (irrespective of fuel costs) while reducing CO{sub 2} and other fuel-related emissions by as much as 29%. Success in achieving these objectives will support a number of broader goals. First, from a national prospective, the program will identify advanced materials that will make it possible to maintain a cost-competitive, environmentally-acceptable coal-based electric generation option. High sulfur coals will specifically benefit in this respect by having these advanced materials evaluated in high-sulfur coal firing conditions and from the significant reductions in waste generation inherent in the increased operational efficiency. Second, from a national perspective, the results of this program will enable domestic boiler manufacturers to successfully compete in world markets for building high-efficiency coal-fired power plants.

R. Viswanathan

2002-04-15T23:59:59.000Z

386

NOx Control for Utility Boiler OTR Compliance  

SciTech Connect (OSTI)

Under sponsorship of the Department of Energy's National Energy Technology Laboratory (NETL), the Babcock and Wilcox Company (B and W), and Fuel Tech teamed together to investigate an integrated solution for NO{sub x} control. The system is comprised of B and W's DRB-4Z{trademark} ultra low-NO{sub x} pulverized coal (PC) burner technology and Fuel Tech's NOxOUT{reg_sign}, a urea-based selective non-catalytic reduction (SNCR) technology. Development of the low-NO{sub x} burner technology has been a focus in B and W's combustion program. The DRB-4Z{trademark} burner is B and W's newest low-NO{sub x} burner capable of achieving very low NO{sub x}. The burner is designed to reduce NO{sub x} by controlled mixing of the fuel and air. Based on data from several 500 to 600 MWe boilers firing PRB coal, NOx emissions levels of 0.15 to 0.20 lb/ 106 Btu have been achieved from the DRB-4Z{trademark} burners in combination with overfire air ports. Although NOx emissions from the DRB-4Z{trademark} burner are nearing the Ozone Transport Rule (OTR) level of 0.15 lb NO{sub x}/106 Btu, the utility boiler owners can still benefit from the addition of an SNCR and/or SCR system in order to comply with the stringent NO{sub x} emission levels facing them. Large-scale testing is planned in B and W's 100-million Btu/hr Clean Environment Development Facility (CEDF) that simulates the conditions of large coal-fired utility boilers. The objective of the project is to achieve a NO{sub x} level below 0.15 lb/106 Btu (with ammonia slip of less than 5 ppm) in the CEDF using PRB coal and B and W's DRB-4Z{trademark} low-NO{sub x} pulverized coal (PC) burner in combination with dual zone overfire air ports and Fuel Tech's NO{sub x}OUT{reg_sign}. During this period B and W prepared and submitted the project management plan and hazardous substance plan to DOE. The negotiation of a subcontract for Fuel Tech has been started.

Hamid Farzan

2003-12-31T23:59:59.000Z

387

Evaluation of Gas Reburning and Low N0x Burners on a Wall Fired Boiler  

SciTech Connect (OSTI)

Under the U.S. Department of Energy's Clean Coal Technology Program (Round 3), a project was completed to demonstrate control of boiler emissions that comprise acid rain precursors, especially NOX. The project involved operating gas reburning technology combined with low NO, burner technology (GR-LNB) on a coal-fired utility boiler. Low NOX burners are designed to create less NOX than conventional burners. However, the NO, control achieved is in the range of 30-60-40, and typically 50%. At the higher NO, reduction levels, CO emissions tend to be higher than acceptable standards. Gas Reburning (GR) is designed to reduce the level of NO. in the flue gas by staged fuel combustion. When combined, GR and LNBs work in harmony to both minimize NOX emissions and maintain an acceptable level of CO emissions. The demonstration was performed at Public Service Company of Colorado's (PSCO) Cherokee Unit 3, located in Denver, Colorado. This unit is a 172 MW. wall-fired boiler that uses Colorado bituminous, low-sulfur coal and had a pre GR-LNB baseline NOX emission of 0.73 lb/1 Oe Btu. The target for the project was a reduction of 70 percent in NOX emissions. Project sponsors included the U.S. Department of Energy, the Gas Research Institute, Public Service Company of Colorado, Colorado Interstate Gas, Electric Power Research Institute, and the Energy and Environmental Research Corporation (EER). EER conducted a comprehensive test demonstration program over a wide range of boiler conditions. Over 4,000 hours of operation were achieved. Intensive measurements were taken to quantify the reductions in NOX emissions, the impact on boiler equipment and operability, and all factors influencing costs. The results showed that GR-LNB technology achieved excellent emission reductions. Although the performance of the low NOX burners (supplied by others) was somewhat less than expected, a NOX reduction of 65% was achieved at an average gas heat input of 180A. The performance goal of 70% reduction was met on many test runs, but at higher gas heat inputs. The impact on boiler equipment was determined to be very minimal. Toward the end of the testing, the flue gas recirculation (used to enhance gas penetration into the furnace) system was removed and new high pressure gas injectors were installed. Further, the low NOX burners were modified and gave better NO. reduction performance. These modifications resulted in a similar NO, reduction performance (64%) at a reduced level of gas heat input (-13Yo). In addition, the OFA injectors were re-designed to provide for better control of CO emissions. Although not a part of this project, the use of natural gas as the primary fuel with gas reburning was also tested. The gas/gas reburning tests demonstrated a reduction in NOX emissions of 43% (0.30 lb/1 OG Btu reduced to 0.17 lb/1 OG Btu) using 7% gas heat input. Economics are a key issue affecting technology development. Application of GR-LNB requires modifications to existing power plant equipment and as a result, the capital and operating costs depend largely on site-specific factors such as: gas availability at the site, gas to coal delivered price differential, sulfur dioxide removal requirements, windbox pressure, existing burner throat diameters, and reburn zone residence time available. Based on the results of this CCT project, EER expects that most GR-LNB installations will achieve at least 60% NOX control when firing 10-15% gas. The capital cost estimate for installing a GR-LNB system on a 300 MW, unit is approximately $25/kW. plus the cost of a gas pipeline (if required). Operating costs are almost entirely related to the differential cost of the natural gas compared to coal.

None

1998-09-01T23:59:59.000Z

388

An integrated assessment of the energy savings and emissions-reduction potential of combined heat and power  

SciTech Connect (OSTI)

Combined Heat and Power (CHP) systems, or cogeneration systems, generated electrical/mechanical and thermal energy simultaneously, recovering much of the energy normally lost in separate generation. This recovered energy can be used for heating or cooling purposes, eliminating the need for a separate boiler. Significant reductions in energy, criteria pollutants, and carbon emissions can be achieved from the improved efficiency of fuel use. Generating electricity on or near the point of use also avoids transmission and distribution losses and defers expansion of the electricity transmission grid. Several recent developments make dramatic expansion of CHP a cost-effective possibility over the next decade. First, advances in technologies such as combustion turbines, steam turbines, reciprocating engines, fuel cells. and heat-recovery equipment have decreased the cost and improved the performance of CHP systems. Second, a significant portion of the nation's boiler stock will need to be replaced in the next decade, creating an opportunity to upgrade this equipment with clean and efficient CHP systems. Third, environmental policies, including addressing concerns about greenhouse gas emissions, have created pressures to find cleaner and more efficient means of using energy. Finally, electric power market restructuring is creating new opportunities for innovations in power generation and smaller-scale distributed systems such as CHP. The integrated analysis suggests that there is enormous potential for the installation of cost-effective CHP in the industrial, district energy, and buildings sectors. The projected additional capacity by 2010 is 73 GW with corresponding energy savings of 2.6 quadrillion Btus, carbon emissions reductions of 74 million metric tons, 1.4 million tons of avoided SO{sub 2} emissions, and 0.6 million tons of avoided NO{sub x} emissions. The authors estimate that this new CHP would require cumulative capital investments of roughly $47 billion over ten years.

Kaarsberg, T.M.; Elliott, R.N.; Spurr, M.

1999-07-01T23:59:59.000Z

389

Final Scientific/Technical Report [Recovery Act: Districtwide Geothermal Heating Conversion  

SciTech Connect (OSTI)

The Recovery Act: Districtwide Geothermal Heating Conversion project performed by the Blaine County School District was part of a larger effort by the District to reduce operating costs, address deferred maintenance items, and to improve the learning environment of the students. This project evaluated three options for the ground source which were Open-Loop Extraction/Re-injection wells, Closed-Loop Vertical Boreholes, and Closed-Loop Horizontal Slinky approaches. In the end the Closed-Loop Horizontal Slinky approach had the lowest total cost of ownership but the majority of the sites associated with this project did not have enough available ground area to install the system so the second lowest option was used (Open-Loop). In addition to the ground source, this project looked at ways to retrofit existing HVAC systems with new high efficiency systems. The end result was the installation of distributed waterto- air heat pumps with water-to-water heat pumps installed to act as boilers/chillers for areas with a high ventilation demand such as they gymnasiums. A number of options were evaluated and the lowest total cost of ownership approach was implemented in the majority of the facilities. The facilities where the lowest total cost of ownership approaches was not selected were done to maintain consistency of the systems from facility to facility. This project had a number of other benefits to the Blaine County public. The project utilizes guaranteed energy savings to justify the levy funds expended. The project also developed an educational dashboard that can be used in the classrooms and to educate the community on the project and its performance. In addition, the majority of the installation work was performed by contractors local to Blaine County which acted as an economic stimulus to the area during a period of recession.

Chatterton, Mike

2014-02-12T23:59:59.000Z

390

Waste-heat utilization. (Latest citations from the U. S. Patent data base). Published Search  

SciTech Connect (OSTI)

The bibliography contains citations of selected patents concerning processes employed for the recovery of useful heat from the environment, or from equipment which generates waste heat. Heat pump systems, furnaces, industrial boilers, and systems employed in the recovery of heat from internal combustion engines are discussed. (Contains 250 citations and includes a subject term index and title list.)

Not Available

1992-10-01T23:59:59.000Z

391

Application of Multivariable Control to Oil and Coal Fired Boilers  

E-Print Network [OSTI]

Increased visibility provided by advanced measurement and control techniques has shown that control of oil and coal fired boilers is a complex problem involving simultaneous determination of flue gas carbon monoxide, hydrocarbon, opacity...

Swanson, K.

1981-01-01T23:59:59.000Z

392

Application of Oxygen Trim Control to Small Packaged Boilers  

E-Print Network [OSTI]

control. New mechanical interfaces capable of modifying the relationship between the air and fuel linkage on existing boilers without expensive jackshaft modification or installation difficulties has significantly reduce the installed cost. A field...

Nelson, R. L.

1984-01-01T23:59:59.000Z

393

A Boiler Plant Energy Efficiency and Load Balancing Survey  

E-Print Network [OSTI]

Daily energy use data was used to perform an energy efficiency survey of a medium-sized university boiler plant. The physical plant operates centralized mechanical plants to provide both chilled water and steam for building conditioning. Steam...

Nutter, D. W.; Murphy, D. R.

394

Cost-Effective Industrial Boiler Plant Efficiency Advancements  

E-Print Network [OSTI]

Natural gas and electricity are expensive to the extent that annual fuel and power costs can approach the initial cost of an industrial boiler plant. Within this context, this paper examines several cost-effective efficiency advancements that were...

Fiorino, D. P.

395

Improving Boiler Efficiency Modeling Based on Ambient Air Temperature  

E-Print Network [OSTI]

Optimum economic operation in a large power plant can cut operating costs substantially. Individual plant equipment should be operated under conditions that are most favorable for maximizing its efficiency. It is widely accepted that boiler load...

Zhou, J.; Deng, S.; Claridge, D. E.; Haberl, J. S.; Turner, W. D.

396

1District health services research: 2011 District health  

E-Print Network [OSTI]

meDicine anD Primary care, faculty of meDicine anD HealtH sciences, stellenboscH university #12RoDUctIon...................................................................................................................................... clInIcal famIly meDIcIne anD DIstRIct health caRe systems1District health services research: 2011 District health services research: 2011Division of family

Geldenhuys, Jaco

397

Inland Navigation Districts and Florida Inland Navigation District Law (Florida)  

Broader source: Energy.gov [DOE]

The first part of this legislation establishes Inland Navigation Districts, which are authorized to plan for and manage the development of inland waterways, and to maintain public navigation...

398

Use Feedwater Economizers for Waste Heat Recovery: Office of Industrial Technologies (OIT) Steam Energy Tips No.3  

SciTech Connect (OSTI)

A feedwater economizer reduces steam boiler fuel requirements by transferring heat from the flue gas to incoming feedwater. Boiler flue gases are often rejected to the stack at temperatures more than 100 F to 150 F higher than the temperature of the generated steam. Generally, boiler efficiency can be increased by 1% for every 40 F reduction in flue gas temperature. By recovering waste heat, an economizer can often reduce fuel requirements by 5% to 10% and pay for itself in less than 2 years. The table provides examples of the potential for heat recovery.

Not Available

2002-03-01T23:59:59.000Z

399

Guided wave acoustic monitoring of corrosion in recovery boiler tubing  

SciTech Connect (OSTI)

Corrosion of tubing used in black-liquor recovery boilers is a major concern in all pulp and paper mills. Extensive corrosion in recovery boiler tubes can result in a significant safety and environmental hazard. Considerable plant resources are expended to inspect recovery boiler tubing. Currently, visual and ultrasonic inspections are primarily used during the annual maintenance shutdown to monitor corrosion rates and cracking of tubing. This Department of Energy, Office of Industrial Technologies project is developing guided acoustic waves for use on recovery boiler tubing. The feature of this acoustic technique is its cost-effectiveness in inspecting long lengths of tubes from a single inspection point. A piezoelectric or electromagnetic transducer induces guided waves into the tubes. The transducer detects fireside defects from the coldside or fireside of the tube. Cracking and thinning on recovery boiler tubes have been detected with this technique in both laboratory and field applications. This technique appears very promising for recovery boiler tube application, potentially expediting annual inspection of tube integrity.

Quarry, M J; Chinn, D J

2004-02-19T23:59:59.000Z

400

Kenston School District | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat JumpInc Place: EdenOverviewKanematsuKas FarmsKenston School District Jump

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Soil Conservation Districts Law (Iowa)  

Broader source: Energy.gov [DOE]

This legislation establishes a soil and water conservation division within the Iowa Department of Agriculture, as well as local soil and water conservation districts. The regulations accompanying...

402

Heat Exchanger Fouling- Prediction, Measurement and Mitigation  

E-Print Network [OSTI]

wall. The fouling probe has been successfully tested in the laboratory at flue gas temperatures up to 2200F and a local heat flux up to 41,000 BTU/hr-ft2. The probe has been field tested at a coal-fired boiler plant. Future tests at a municipal waste...

Peterson, G. R.

403

Conceptual Design of Oxygen-Based PC Boiler  

SciTech Connect (OSTI)

Coal is presently the world's primary fuel for generating electrical power and, being more abundant and less expensive than oil or natural gas, is expected to continue its dominance into the future. Coal, however, is more carbon intensive than natural gas and oil and consequently coal-fired power plants are large point source emitters of carbon dioxide (CO{sub 2}). Since CO{sub 2} is a greenhouse gas, which may have an adverse impact on the world's climate/weather patterns, studies have been conducted to determine the feasibility and economic impact of capturing power plant CO{sub 2} emissions for pipeline transport to a sequestration/storage site. The stack gas that exhausts from a modern coal-fired power plant typically contains about 15% CO{sub 2} on a dry volume basis. Although there are numerous processes available for removing CO{sub 2} from gas streams, gas scrubbing with amine solvent is best suited for this application because of the large gas volumes and low CO{sub 2} concentrations involved. Unfortunately the energy required to regenerate the solvent for continued use as a capturing agent is large and imposes a severe energy penalty on the plant. In addition this ''back end'' or post combustion cleanup requires the addition of large vessels, which, in retrofit applications, are difficult to accommodate. As an alternative to post combustion scrubbing, Foster Wheeler (FW) has proposed that the combustion process be accomplished with oxygen rather than air. With all air nitrogen eliminated, a CO{sub 2}-water vapor rich flue gas will be generated. After condensation of the water vapor, a portion of the flue gas will be recirculated back to the boiler to control the combustion temperature and the balance of the CO{sub 2} will be processed for pipeline transport. This proposed oxygen-carbon dioxide (O{sub 2}/CO{sub 2}) combustion process eliminates the need for CO{sub 2} removal/separation and reduces the cost of supplying a CO{sub 2} rich stream for sequestration. FW has developed a conceptual design of an O{sub 2} fired boiler to determine overall plant performance and economics. Five subtasks were conducted: (1) a literature review, (2) a system design and analysis, (3) a low NOx burner design and analysis, (4) a furnace and heat recovery area design analysis, and (5) an economic analysis. The objective of the literature search is to locate any data/information relevant to the Oxygen-Based PC Boiler conceptual design. The objective of the system design and analysis task is to optimize the PC boiler plant by maximizing system efficiency within practical considerations. Simulations of the oxygen-fired plant with CO{sub 2} sequestration were conducted using Aspen Plus and were compared to a reference air-fired 460 MW plant. Flue gas recycle is used in the O{sub 2}-fired PC to control the flame temperature. Parametric runs were made to determine the effect of flame temperature on system efficiency and required waterwall material and thickness. The degree of improvement on system efficiency of various modifications including hot gas recycle, purge gas recycle, flue gas feedwater recuperation, and recycle purge gas expansion were investigated. The selected O{sub 2}-fired design case has a system efficiency of 30.6% compared to the air-fired system efficiency of 36.7%. The design O{sub 2}-fired case requires T91 waterwall material and has a waterwall surface area of only 65% of the air-fired reference case. The objective of the low NOx burner design and analysis task is to optimize the burner design to ensure stable ignition, to provide safe operation, and to minimize pollutant formation. The burners were designed and analyzed using the Fluent CFD computer program. Four burner designs were developed: (1) with no OFG and 65% flue gas recycle, (2) with 20% OFG and 65% flue gas recycle, (3) with no OFG and 56% flue gas recycle and (4) with 20% OFG and 56% flue gas recycle. A 3-D Fluent simulation was made of a single wall-fired burner and horizontal portion of the furnace from the wall to the center. Without primary gas sw

Andrew Seltzer; Zhen Fan

2005-09-01T23:59:59.000Z

404

Research District Seeing Growth  

SciTech Connect (OSTI)

Monthly economic diversity column for the Tri-City Herald (May 2012) - excerpt follows: Its been a while since Ive updated you on the Tri-Cities Research District, most certainly not for lack of new activity over the past several months. In fact, much has happened, and theres more to come. I think many of us see new land development and construction as indicative of current or impending economic growth. So those of you who have ventured into North Richland either via Stevens Drive or George Washington Way lately have probably begun sensing and anticipating that such growth is afoot.

Madison, Alison L.

2012-05-13T23:59:59.000Z

405

Predictive modelling of boiler fouling. Final report.  

SciTech Connect (OSTI)

A spectral element method embodying Large Eddy Simulation based on Re- Normalization Group theory for simulating Sub Grid Scale viscosity was chosen for this work. This method is embodied in a computer code called NEKTON. NEKTON solves the unsteady, 2D or 3D,incompressible Navier Stokes equations by a spectral element method. The code was later extended to include the variable density and multiple reactive species effects at low Mach numbers, and to compute transport of large particles governed by inertia. Transport of small particles is computed by treating them as trace species. Code computations were performed for a number of test conditions typical of flow past a deep tube bank in a boiler. Results indicate qualitatively correct behavior. Predictions of deposition rates and deposit shape evolution also show correct qualitative behavior. These simulations are the first attempts to compute flow field results at realistic flow Reynolds numbers of the order of 10{sup 4}. Code validation was not done; comparison with experiment also could not be made as many phenomenological model parameters, e.g., sticking or erosion probabilities and their dependence on experimental conditions were not known. The predictions however demonstrate the capability to predict fouling from first principles. Further work is needed: use of large or massively parallel machine; code validation; parametric studies, etc.

Chatwani, A

1990-12-31T23:59:59.000Z

406

acquired thermotolerance heat: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

face recognition. Kuang-chih Lee; Jeffrey Ho; David Kriegman 2005-01-01 47 ABSORPTION HEAT PUMP IN THE DISTRICT HEATING Energy Storage, Conversion and Utilization Websites Summary:...

407

Model-free adaptive control of supercritical circulating fluidized-bed boilers  

DOE Patents [OSTI]

A novel 3-Input-3-Output (3.times.3) Fuel-Air Ratio Model-Free Adaptive (MFA) controller is introduced, which can effectively control key process variables including Bed Temperature, Excess O2, and Furnace Negative Pressure of combustion processes of advanced boilers. A novel 7-input-7-output (7.times.7) MFA control system is also described for controlling a combined 3-Input-3-Output (3.times.3) process of Boiler-Turbine-Generator (BTG) units and a 5.times.5 CFB combustion process of advanced boilers. Those boilers include Circulating Fluidized-Bed (CFB) Boilers and Once-Through Supercritical Circulating Fluidized-Bed (OTSC CFB) Boilers.

Cheng, George Shu-Xing; Mulkey, Steven L

2014-12-16T23:59:59.000Z

408

Drainage, Sanitation, and Public Facilities Districts (Virginia)  

Broader source: Energy.gov [DOE]

This legislation provides for the establishment of sanitary, sanitation, drainage, and public facilities districts in Virginia. Designated districts are public bodies, and have the authority to...

409

Upgraded recovery boiler meets low air emissions standards  

SciTech Connect (OSTI)

In the fall of 1990, the Boise Cascade mill in International Falls, MN, carried out a millwide modernization project. One critical element of the project was the upgrade of their recovery boiler. As a result of the recovery boiler upgrade, the mill was required to obtain a prevention of significant deterioration (PSD) air permit. A best available control technology (BACT) assessment was performed as a requirement of the PSD regulations. Ultimately, a number of more stringent air pollution emission limits were established for the boiler, and a continuous emissions monitoring system (CEMS) was purchased and installed to report daily results to the Minnesota Pollution Control Agency. This paper describes efforts to achieve increased firing capacity in the mill's recovery boiler while meeting more severe air emissions regulations. The authors will show that each of the emissions limits, including CO, SO[sub 2], NO[sub x], TRS, and opacity, are met by the upgraded boiler, while achieving an increase in firing capacity over pre-upgrade levels of up to 40%.

La Fond, J.F.; Jansen, J.H. (Jansen Combustion and Boiler Technologies, Inc., Woodinville, WA (United States)); Eide, P. (Boise Cascade Corp., International Falls, MN (United States))

1994-12-01T23:59:59.000Z

410

Plasma-supported coal combustion in boiler furnace  

SciTech Connect (OSTI)

Plasma activation promotes more effective and environmentally friendly low-rank coal combustion. This paper presents Plasma Fuel Systems that increase the burning efficiency of coal. The systems were tested for fuel oil-free start-up of coal-fired boilers and stabilization of a pulverized-coal flame in power-generating boilers equipped with different types of burners, and burning all types of power-generating coal. Also, numerical modeling results of a plasma thermochemical preparation of pulverized coal for ignition and combustion in the furnace of a utility boiler are discussed in this paper. Two kinetic mathematical models were used in the investigation of the processes of air/fuel mixture plasma activation: ignition and combustion. A I-D kinetic code PLASMA-COAL calculates the concentrations of species, temperatures, and velocities of the treated coal/air mixture in a burner incorporating a plasma source. The I-D simulation results are initial data for the 3-D-modeling of power boiler furnaces by the code FLOREAN. A comprehensive image of plasma-activated coal combustion processes in a furnace of a pulverized-coal-fired boiler was obtained. The advantages of the plasma technology are clearly demonstrated.

Askarova, A.S.; Karpenko, E.I.; Lavrishcheva, Y.I.; Messerle, V.E.; Ustimenko, A.B. [Kazakh National University, Alma Ata (Kazakhstan). Dept. of Physics

2007-12-15T23:59:59.000Z

411

NICKEL SPECIES EMISSION INVENTORY FOR OIL-FIRED BOILERS  

SciTech Connect (OSTI)

Representative duplicate fly ash samples were obtained from the stacks of 400-MW and 385-MW utility boilers (Unit A and Unit B, respectively) using a modified U.S. Environmental Protection Agency (EPA) Method 17 sampling train assembly as they burned .0.9 and 0.3 wt% S residual oils, respectively, during routine power plant operations. Residual oil fly ash (ROFA) samples were analyzed for nickel (Ni) concentrations and speciation using inductively coupled plasma-atomic emission spectroscopy, x-ray absorption fine structure (XAFS) spectroscopy, x-ray diffraction (XRD), and a water-soluble Ni extraction method. ROFA water extraction residues were also analyzed for Ni speciation using XAFS and XRD. Total Ni concentrations in the ROFAs were similar, ranging from 1.3 to 1.5 wt%; however, stack gas Ni concentrations in the Unit A were {approx}990 {micro}g/Nm{sup 3} compared to {approx}620 {micro}g/Nm{sup 3} for Unit B because of the greater residual oil feed rates employed at Unit A to attain higher load (i.e., MW) conditions with a lower heating value oil. Ni speciation analysis results indicate that ROFAs from Unit A contain about 3 wt% NiSO{sub 4} {center_dot} xH{sub 2}O (where x is assumed to be 6 for calculation purposes) and a Ni-containing spinel compound, similar in composition to (Mg,Ni)(Al,Fe){sub 2}O{sub 4}. ROFAs from Unit B contain on average 2.0 wt% NiSO{sub 4} {center_dot} 6H{sub 2}O and 1.1 wt% NiO. XAFS and XRD analyses did not detect any nickel sulfide compounds, including nickel subsulfide (Ni{sub 3}S{sub 2}) (XAFS detection limit is 5% of the total Ni concentration). In addition, XAFS measurements indicated that inorganic sulfate and organic thiophene species account for >97% of the total sulfur in the ROFAs. The presence of NiSO{sub 4} {center_dot} xH{sub 2}O and nickel oxide compound mixtures and lack of carcinogenic Ni{sub 3}S{sub 2} or nickel sulfide compounds (e.g., NiS, NiS{sub 2}) in ROFAs stack-sampled from 400- and 385-MW boilers are contrary to EPA's Ni inhalation cancer risk assessment (''Study of Hazardous Air Pollutant Emissions from Electric Utility Steam Generating Units--Final Report to Congress'', February 1998), where it is assumed that the Ni compound mixture emitted from oil-fired utilities is 50% as carcinogenic as Ni{sub 3}S{sub 2}. Apparently, this assumption greatly overestimates the Ni inhalation cancer risk from oil-fired utilities.

Kevin C. Galbreath; Richard L. Schulz; Donald L. Toman; Carolyn M. Nyberg

2004-01-01T23:59:59.000Z

412

Cyclone Boiler Reburn NOx Control Improvements via Cyclone Design Improvements and Advanced Air Staging  

E-Print Network [OSTI]

Eastman Kodak owns three Babcock & Wilcox coal fired cyclone boilers and one Combustion Engineering pulverized coal boiler located at Kodak Park in Rochester, New York. Duke Energy Generation Services (DEGS) operates and maintains the steam...

Morabito, B.; Nee, B.; Goff, V.; Maringo, G.

2008-01-01T23:59:59.000Z

413

Damage Modeling and Life Extending Control of a Boiler-Turbine System1  

E-Print Network [OSTI]

Damage Modeling and Life Extending Control of a Boiler-Turbine System1 Donglin Li Tongwen Chen2 hierarchical LEC structure and apply it to a typ- ical boiler system. There are two damage models

Marquez, Horacio J.

414

From Basic Control to Optimized Systems-Applying Digital Control Systems to Steam Boilers  

E-Print Network [OSTI]

This presentation examines the application of Distributed Digital Controls in order to review the application of this recent control technology towards Steam Boilers in a step-by-step manner. The main purpose of a steam generating boiler...

Hockenbury, W. D.

1982-01-01T23:59:59.000Z

415

2015-02-13 Issuance: Test Procedure for Furnaces and Boilers...  

Energy Savers [EERE]

2015-02-13 Issuance: Test Procedure for Furnaces and Boilers; Notice of Proposed Rulemaking 2015-02-13 Issuance: Test Procedure for Furnaces and Boilers; Notice of Proposed...

416

Evaluation of gas-reburning and low NO sub x burners on a wall fired boiler  

SciTech Connect (OSTI)

Low NO{sub x} burners operate on the principle of delayed mixing between the coal fuel and burner air, so that less NO{sub x} is formed. Gas reburning is a combustion modification technique that consists of firing 80--85 percent of the fuel corresponding to the total heat release in the lower furnace. Reduction of NO{sub x} to molecular nitrogen (N{sub 2}) is accomplished via the downstream injection of the remaining fuel requirement in the form of natural gas (which also reduces the total SO{sub x} emissions). In a third stage, burnout air is injected at the lower temperatures in the upper furnace to complete the combustion process without generating significant additional NO{sub x}. The specific goal of this project is to demonstrate NO{sub x} emission reductions of 75 percent or more as a result of combing Low NO{sub x} Burners and Gas Reburning on a utility boiler having the design characteristics mentioned above. A Host Site Agreement has been signed by EER and a utility company in the State of Colorado: Public Service Company of Colorado (Cherokee Unit No. 3, 172 MW{sub e}) front wall fired boiler near Denver.

Not Available

1992-01-15T23:59:59.000Z

417

Split stream boilers for high-temperature/high-pressure topping steam turbine combined cycles  

SciTech Connect (OSTI)

Research and development work on high-temperature and high-pressure (up to 1,500 F TIT and 4,500 psia) topping steam turbines and associated steam generators for steam power plants as well as combined cycle plants is being carried forward by DOE, EPRI, and independent companies. Aeroderivative gas turbines and heavy-duty gas turbines both will require exhaust gas supplementary firing to achieve high throttle temperatures. This paper presents an analysis and examples of a split stream boiler arrangement for high-temperature and high-pressure topping steam turbine combined cycles. A portion of the gas turbine exhaust flow is run in parallel with a conventional heat recovery steam generator (HRSG). This side stream is supplementary fired opposed to the current practice of full exhaust flow firing. Chemical fuel gas recuperation can be incorporated in the side stream as an option. A significant combined cycle efficiency gain of 2 to 4 percentage points can be realized using this split stream approach. Calculations and graphs show how the DOE goal of 60 percent combined cycle efficiency burning natural gas fuel can be exceeded. The boiler concept is equally applicable to the integrated coal gas fuel combined cycle (IGCC).

Rice, I.G. [Rice (I.G.), Spring, TX (United States)

1997-04-01T23:59:59.000Z

418

Investigation of Fly Ash and Activated Carbon Obtained from Pulverized Coal Boilers  

SciTech Connect (OSTI)

One of the techniques for Hg capture in coal-fired boilers involves injection of activated carbon (AC) into the boiler downstream of the air preheater. Hg is adsorbed onto the AC particles and fly ash, which are then both removed in an electrostatic precipitator or baghouse. This project addressed the issues of Hg on activated carbon and on fly ash from a materials re-use point of view. It also addressed the possible connection between SCR reactors, fly ash properties and Hg capture. The project has determined the feasibility of separating AC from fly ash in a fluidized bed and of regenerating the separated AC by heating the AC to elevated temperatures in a fluidized bed. The temperatures needed to drive off the Hg from the ash in a fluidized bed have also been determined. Finally, samples of fly ash from power plants with SCR reactors for NO{sub x} control have been analyzed in an effort to determine the effects of SCR on the ash.

Edward K. Levy; Christopher Kiely; Zheng Yao

2006-08-31T23:59:59.000Z

419

Wood Pellet-Fired Biomass Boiler Project at the Ketchikan Federal Building  

SciTech Connect (OSTI)

Biomass boiler systems have existed for many years, but the technology has advanced in recent decades and can now provide automated and efficient operation for a relatively modest investment. Key advances in system monitoring and control allow for lower operating costs, since the control systems run all aspects of the boiler, including feed, load reduction and even tube cleaning. These advances have made such systems economical on a small scale in situations where inexpensive fuels like natural gas are not available. This creates an opportunity for building operators in remote, cold-climate locations to reduce the use of expensive fuels for heating buildings. GSA Region 10 installed the system at the federal building in Ketchikan, Alaska and submitted the project to the Green Proving Ground (GPG) program. GSA's GPG program contracted with the National Renewable Energy Laboratory (NREL) to assess the installation and the technology. The system serves as a demonstration to assess actual system efficiencies, as well as operating characteristics and financial benefits. In addition to installation and operational issues, the project team/researchers examined other issues, including fuel transportation costs, building energy savings, and overall economics.

Tomberlin, G.

2014-06-01T23:59:59.000Z

420

The Cost of Heat Exchanger Fouling in the U. S. Industries  

E-Print Network [OSTI]

and other industries. The 1982 U.S. sales of all industrial heat exchangers, excepting boilers and automotive radiators, was about 285,000 units amounting to about $1.6 billion. The total heat duty of all the heat exchangers in industrial operation...

Rebello, W. J.; Richlen, S. L.; Childs, F.

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

UVM Central Heating & Cooling Plant Annual Maintenance Shutdown 2013 Affected Buildings  

E-Print Network [OSTI]

UVM Central Heating & Cooling Plant Annual Maintenance Shutdown 2013 Affected Buildings Sunday 19 heating, hot water and critical air conditioning > NO CAGE WASHING > NO AUTOCLAVES > Given Boiler Plant will be in operation to provide heating, hot water and critical air conditioning > NO CAGE WASHING > NO AUTOCLAVES

Hayden, Nancy J.

422

Electricity-producing heating apparatus utilizing a turbine generator in a semi-closed brayton cycle  

DOE Patents [OSTI]

The present invention provides apparatus and methods for producing both heat and electrical energy by burning fuels in a stove or boiler using a novel arrangement of a surface heat exchanger and microturbine-powered generator and novel surface heat exchanger. The equipment is particularly suited for use in rural and relatively undeveloped areas, especially in cold regions and highlands.

Labinov, Solomon D.; Christian, Jeffrey E.

2003-10-07T23:59:59.000Z

423

The Sudbury Mining District  

E-Print Network [OSTI]

for Digital Scholarship. http://kuscholarworks.ku.edu Submitted to the School of Engineering of the University of Kansas in partial fulfillment of the requirements for a course in Mining Engineering ran THE SUDBURY MINING DISTRICT. A D i s s e r t a t i o... n P r e s e n t e d t o the F a c u l t y o f the SCHOOL OP ENGINEERING i n the UNIVERSITY OP KANSAS. F o r the Completion o f a Course i n MINING ENGINEERING. fey Prank G. B e d e l l . June 1906. PREFACE I n t h i s paper w i l l be g i...

Bedell, Frank G.

1906-06-01T23:59:59.000Z

424

COAL-FIRED UTILITY BOILERS: SOLVING ASH DEPOSITION PROBLEMS  

SciTech Connect (OSTI)

The accumulation of slagging and fouling ash deposits in utility boilers has been a source of aggravation for coal-fired boiler operators for over a century. Many new developments in analytical, modeling, and combustion testing methods in the past 20 years have made it possible to identify root causes of ash deposition. A concise and comprehensive guidelines document has been assembled for solving ash deposition as related to coal-fired utility boilers. While this report accurately captures the current state of knowledge in ash deposition, note that substantial research and development is under way to more completely understand and mitigate slagging and fouling. Thus, while comprehensive, this document carries the title ''interim,'' with the idea that future work will provide additional insight. Primary target audiences include utility operators and engineers who face plant inefficiencies and significant operational and maintenance costs that are associated with ash deposition problems. Pulverized and cyclone-fired coal boilers are addressed specifically, although many of the diagnostics and solutions apply to other boiler types. Logic diagrams, ash deposit types, and boiler symptoms of ash deposition are used to aid the user in identifying an ash deposition problem, diagnosing and verifying root causes, determining remedial measures to alleviate or eliminate the problem, and then monitoring the situation to verify that the problem has been solved. In addition to a step-by-step method for identifying and remediating ash deposition problems, this guideline document (Appendix A) provides descriptions of analytical techniques for diagnostic testing and gives extensive fundamental and practical literature references and addresses of organizations that can provide help in alleviating ash deposition problems.

Christopher J. Zygarlicke; Donald P. McCollor; Steven A. Benson; Jay R. Gunderson

2001-04-01T23:59:59.000Z

425

EA-1922: Combined Power and Biomass Heating System, Fort Yukon, Alaska  

Broader source: Energy.gov [DOE]

DOE (lead agency), Denali Commission (cooperating agency) and USDA Rural Utilities Services (cooperating agency) are proposing to provide funding to support the final design and construction of a biomass combined heat and power plant and associated district heating system to the Council of Athabascan Tribal Governments and the Gwitchyaa Zhee Corporation. The proposed biomass district heating system would be located in Fort Yukon Alaska.

426

Boiler Kids Camp Parent Manual Division of Recreational Sports Mission Statement  

E-Print Network [OSTI]

Boiler Kids Camp Parent Manual Division of Recreational Sports Mission Statement The Division which fosters an appreciation for a healthy lifestyle and promotes lifelong learning. Boiler Kids Camp Mission Statement Boiler Kids Camp is an interactive, summer day camp designed for children ranging

Ginzel, Matthew

427

Decentralized robust control of a class of nonlinear systems and application to a boiler system  

E-Print Network [OSTI]

Decentralized robust control of a class of nonlinear systems and application to a boiler system Keywords: Asymptotic disturbance rejection Boiler systems Decentralized robust control Descriptor systems problem, a decentralized controller for the system can be calculated. In order to control a utility boiler

Marquez, Horacio J.

428

DETECTION OF EVENTS CAUSING PLUGGAGE OF A COAL-FIRED BOILER: A DATA MINING  

E-Print Network [OSTI]

DETECTION OF EVENTS CAUSING PLUGGAGE OF A COAL-FIRED BOILER: A DATA MINING APPROACH ANDREW KUSIAK to analyze events leading to plug- gage of a boiler. The proposed approach involves statistics, data. The proposed approach has been tested on a 750 MW commercial coal-fired boiler affected with an ash fouling

Kusiak, Andrew

429

Development and Application of Gas Sensing Technologies to Enable Boiler Balancing  

E-Print Network [OSTI]

01/2004 Development and Application of Gas Sensing Technologies to Enable Boiler Balancing to monitor total NOx (0-1000 ppm), CO (0-1000 ppm) and O2 (1-15%) within the convective pass of the boiler of such sensor systems will dramatically alter how boilers are operated, since much of the emissions creation

Dutta, Prabir K.

430

Full-Scale Boiler Measurements Demonstrating Striated Flows during Biomass Co-Firing  

E-Print Network [OSTI]

ACERC-2008 Full-Scale Boiler Measurements Demonstrating Striated Flows during Biomass Co based measurements methods #12;Objective Minor impact of biomass cofiring with coal on boiler operation) · Experimentally demonstrate the existence of stratified flows in boilers Indication: SO2, ash composition, straw

431

MODELLING OF A NONLINEAR MULTIVARIABLE BOILER PLANT USING HAMMERSTEIN MODEL, A NONPARAMETRIC APPROACH  

E-Print Network [OSTI]

MODELLING OF A NONLINEAR MULTIVARIABLE BOILER PLANT USING HAMMERSTEIN MODEL, A NONPARAMETRIC mathematically and prac- tically tractable. Boilers are industrial units, which are used for gener- ating steam of fuel. Boiler operation is a complex operation in which hot water must be delivered to a turbine

Al-Duwaish, Hussain N.

432

Re ning Abstract Machine Speci cations of the Steam Boiler Control to Well Documented  

E-Print Network [OSTI]

Re ning Abstract Machine Speci cations of the Steam Boiler Control to Well Documented Executable the steam boiler control speci cation problem to il- lustrate how the evolving algebra approach to the speci, in June 1995, to control the Karlsruhe steam boiler simulator satisfactorily. The abstract machines

Börger, Egon

433

Corrections to "Proving Safety Properties of the Steam Boiler Controller" Correction Sheet  

E-Print Network [OSTI]

Corrections to "Proving Safety Properties of the Steam Boiler Controller" 1 Correction Sheet After our paper "Proving Safety Properties of the Steam Boiler Controller" went already to print, Myla address http://theory.lcs.mit.edu/tds/boiler.html. Following are the corrections to these errors and some

Lynch, Nancy

434

An Algebraic Speci cation of the Steam-Boiler Control System  

E-Print Network [OSTI]

An Algebraic Speci#12;cation of the Steam-Boiler Control System Michel Bidoit 1 , Claude Chevenier describe how to derive an algebraic speci#12;cation of the Steam-Boiler Control System starting from to specify the detection of the steam-boiler fail- ures. Finally we discuss validation and veri#12;cation

Bidoit, Michel

435

welcome to university residences Boiler Gold Rush Check-In...........................Saturday, August 13 and  

E-Print Network [OSTI]

welcome to university residences #12;Boiler Gold Rush Check-In...........................Saturday, August 13 and Sunday, August 14, 2011 Boiler Gold Rush residence hall systems in the United States. weLcomE! 1 #12;Boiler GoLD Rush ParticiPants Your regular

Fernández-Juricic, Esteban

436

Analysis and control of a nonlinear boiler-turbine unit Wen Tan a,*,1  

E-Print Network [OSTI]

Analysis and control of a nonlinear boiler-turbine unit Wen Tan a,*,1 , Horacio J. Marquez b, and the concept is applied to a boiler-turbine unit to analyze its dynamics. It is shown that the unit shows. Keywords: Boiler-turbine unit; Nonlinearity measure; Gap metric; Anti-windup bumpless transfer techniques

Marquez, Horacio J.

437

Wood Pellets for UBC Boilers Replacing Natural Gas Based on LCA  

E-Print Network [OSTI]

Wood Pellets for UBC Boilers Replacing Natural Gas Based on LCA Submitted to Dr. Bi By Bernard Chan Pellets for UBC Boilers Replacing Natural Gas" By Bernard Chan, Brian Chan, and Christopher Young Abstract This report studies the feasibility of replacing natural gas with wood pellets for UBC boilers. A gasification

438

Gain-scheduled `1 -optimal control for boiler-turbine dynamics  

E-Print Network [OSTI]

, into the mechanical energy acting on the turbine and generator. The steam generated in the boiler system servesGain-scheduled `1 -optimal control for boiler-turbine dynamics with actuator saturation Pang; accepted 2 June 2003 Abstract This paper presents a gain-scheduled approach for boiler-turbine controller

Shamma, Jeff S.

439

Proving Safety Properties of the Steam Boiler Controller G. Leeb, N. Lynch Page 1 of 20  

E-Print Network [OSTI]

Proving Safety Properties of the Steam Boiler Controller G. Leeb, N. Lynch Page 1 of 20 Proving Safety Properties of the Steam Boiler Controller Formal Methods for Industrial Applications: A Case Study system consisting of a continuous steam boiler and a discrete controller. Our model uses the Lynch

Lynch, Nancy

440

Revisiting the Steam-Boiler Case Study with LUTESS : Modeling for Automatic Test Generation  

E-Print Network [OSTI]

Revisiting the Steam-Boiler Case Study with LUTESS : Modeling for Automatic Test Generation. In this paper, we apply this modeling principle to a well known case study, the steam boiler problem which has model and to assess the difficulty of such a process in a realistic case study. The steam boiler case

Boyer, Edmond

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Assertional Specification and Verification using PVS of the Steam Boiler Control System  

E-Print Network [OSTI]

Assertional Specification and Verification using PVS of the Steam Boiler Control System Jan Vitt 1 of the steam boiler control system has been derived using a formal method based on assumption/commitment pairs Introduction The steam boiler control system, as described in chapter AS of this book, has been designed

Hooman, Jozef

442

Proving Safety Properties of the Steam Boiler Controller G. Leeb, N. Lynch Page 1 of 37  

E-Print Network [OSTI]

Proving Safety Properties of the Steam Boiler Controller G. Leeb, N. Lynch Page 1 of 37 Proving Safety Properties of the Steam Boiler Controller Formal Methods for Industrial Applications: A Case Study system consisting of a continuous steam boiler and a discrete controller. Our model uses the Lynch

Lynch, Nancy

443

Wood-Coal Fired "Small" Boiler Case Study  

E-Print Network [OSTI]

extremely attrac t:i.ve to today's capital investment market. 7. Several states, including North Carolina, have enacted 15% State Tax Credits to further the use of wood fuel boilers. Specific examples of the utilization of wood as a boiler fuel include... on the fact that Galaxy would be purchasing all of its waste wood fuel, as well as supplemental coal if needed. Efficiency guarantees of 80% on wood waste with less than 10% moisture content were given, as well as 78.5% on coal. These efficiencies were...

Pincelli, R. D.

1980-01-01T23:59:59.000Z

444

Black Liquor Combustion Validated Recovery Boiler Modeling, Final Year Report, Volume 3: Appendix II, Sections 2 & 3 and Appendix III  

SciTech Connect (OSTI)

This project was initiated in October 1990 with the objective of developing and validating a new computer model of a recovery boiler furnace using a computational fluid dynamics (CFD) code specifically tailored to the requirements for solving recovery boiler flows, and using improved submodels for black liquor combustion based on continued laboratory fundamental studies. Many of these objectives were accomplished at the end of the first five years and documented in a comprehensive report on that work (DOE/CE/40936-T3, 1996). A critical review of recovery boiler modeling, carried out in 1995, concluded that further enhancements of the model were needed to make reliable predictions of key output variables. In addition, there was a need for sufficient understanding of fouling and plugging processes to allow model outputs to be interpreted in terms of the effect on plugging and fouling. As a result, the project was restructured and reinitiated at the end of October 1995, and was completed in June 1997. The entire project is now complete and this report summarizes all of the work done on the project since it was restructured. The key tasks to be accomplished under the restructured project were to (1) Complete the development of enhanced furnace models that have the capability to accurately predict carryover, emissions behavior, dust concentrations, gas temperatures, and wall heat fluxes; (2) Validate the enhanced furnace models, so that users can have confidence in the results; (3) Obtain fundamental information on aerosol formation, deposition, and hardening so as to develop the knowledge base needed to relate furnace model outputs to plugging and fouling in the convective sections of the boiler; and (4) Facilitate the transfer of codes, black liquor submodels, and fundamental knowledge to the U.S. kraft pulp industry.

T.M. Grace, W.J. Frederick, M. Salcudean, R.A. Wessel

1998-08-01T23:59:59.000Z

445

Proceedings: Heat exchanger workshop  

SciTech Connect (OSTI)

Heat transfer processes are of controlling importance in the operation of a thermal power plant. Heat exchangers are major cost items and are an important source of problems causing poor power plant availability and performance. A workshop to examine the improvements that can be made to heat exchangers was sponsored by the Electric Power Research Institute (EPRI) on June 10-11, 1986, in Palo Alto, California. This workshop was attended by 25 engineers and scientists representing EPRI-member utilities and EPRI consultants. A forum was provided for discussions related to the design, operation and maintenance of utility heat transfer equipment. The specific objectives were to identify research directions that could significantly improve heat exchanger performance, reliability and life cycle economics. Since there is a great diversity of utility heat transfer equipment in use, this workshop addressed two equipment categories: Boiler Feedwater Heaters (FWH) and Heat Recovery Steam Generators (HRSG). The workshop was divided into the following panel sessions: functional design, mechanical design, operation, suggested research topics, and prioritization. Each panel session began with short presentations by experts on the subject and followed by discussions by the attendees. This report documents the proceedings of the workshop and contains recommendations of potentially valuable areas of research and development. 4 figs.

Not Available

1987-07-01T23:59:59.000Z

446

NOx Control for Utility Boiler OTR Compliance  

SciTech Connect (OSTI)

Babcock & Wilcox Power Generation Group (B&W) and Fuel Tech, Inc. (Fuel Tech) teamed to evaluate an integrated solution for NO{sub x} control comprised of B&W's DRB-4Z{reg_sign} low-NO{sub x} pulverized coal (PC) burner technology and Fuel Tech's NO{sub x}OUT{reg_sign}, a selective non-catalytic reduction (SNCR) technology, capable of meeting a target emission limit of 0.15 lb NO{sub x}/10{sup 6} Btu. In a previous project sponsored by the U.S. Department of Energy (DOE), promising results were obtained with this technology from large-scale testing in B&W's 100-million Btu/hr Clean Environment Development Facility (CEDF) which simulates the conditions of large coal-fired utility boilers. Under the most challenging boiler temperatures at full load conditions, NO{sub x} emissions of 0.19 lb/10{sup 6} Btu were achieved firing Powder River Basin coal while controlling ammonia slip to less than 5 ppm. At a 40 million Btu/hr firing rate, NO{sub x} emissions were as low as 0.09 lb/10{sup 6} Btu. Improved performance with this system was proposed for this new program with injection at full load via a convective pass multiple nozzle lance (MNL) in front of the superheater tubes or in the convective tube bank. Convective pass lances represent the current state-of-the-art in SNCR and needed to be evaluated in order to assess the full potential of the combined technologies. The objective of the program was to achieve a NO{sub x} level below 0.15 lb/10{sup 6} Btu (with ammonia slip of less than 5 ppm) in the CEDF using PRB coal and B&W's DRB-4Z{reg_sign} low-NO{sub x} pulverized coal (PC) burner in combination with dual zone overfire air ports and Fuel Tech's NO{sub x}OUT{reg_sign} System. Commercial installations of B&W's low-NO{sub x} burner, in combination with overfire air ports using PRB coal, have demonstrated a NO{sub x} level of 0.15 to 0.2 lb/10{sup 6} Btu under staged combustion conditions. The proposed goal of the combustion system (no SNCR) for this project is a NO{sub x} level at 0.15 lb/10{sup 6} Btu. The NO{sub x} reduction goal for SNCR is 25% from the low-NO{sub x} combustion emission levels. Therefore, overall NO{sub x} emissions would approach a level of 0.11 lb/10{sup 6} Btu in commercial installation. The goals of the program were met. At 100% load, using the MNL for very low baseline NO{sub x} (0.094 to 0.162 lb/10{sup 6} Btu depending on burner stoichiometry), an approximately 25% NO{sub x} reduction was achieved (0.071 to 0.124 lb/10{sup 6} Btu) while maintaining NH{sub 3} slip less than 6.4 ppm. At 60% load, using MNL or only wall-injectors for very low baseline NO{sub x} levels, more than 30% NO{sub x} reduction was achieved. Although site specific economic evaluation is required for each unit, our economic evaluation of DRB-4Z{reg_sign} burner and SNCR for a 500 MW{sub e} plant firing PRB shows that the least cost strategy is low-NO{sub x} burner and OFA at a cost of $210 to $525 per ton of NO{sub x} removed. Installation of SNCR allows the utilities to sell more NO{sub x} credit and it becomes economical when NO{sub x} credit cost is more than $5,275 per ton of NO{sub x}.

Hamid Farzan; Jennifer L. Sivy

2005-07-30T23:59:59.000Z

447

Water Development Districts (South Dakota)  

Broader source: Energy.gov [DOE]

The South Dakota Conservancy District is a governmental agency administered by the Board of Water and Natural Resources, but its duties are predominantly carried out by local Water Development...

448

Boiler and steam generator corrosion: Fossil fuel power plants. (Latest citations from the NTIS Bibliographic database). Published Search  

SciTech Connect (OSTI)

The bibliography contains citations concerning corrosion effects, mechanisms, detection, and inhibition in fossil fuel fired boilers. Fluidized bed combustors and coal gasification are included in the applications. The citations examine hot corrosion, thermal mechanical degradation, and intergranular oxidation corrosion studies performed on the water side and hot gas side of heat exchanger tubes and support structures. Coatings and treatment of material to inhibit corrosion are discussed. Corrosion affecting nuclear powered steam generators is examined in a separate bibliography. (Contains a minimum of 119 citations and includes a subject term index and title list.)

Not Available

1994-11-01T23:59:59.000Z

449

Process to eliminate production of fly ash by wet bottom boilers  

SciTech Connect (OSTI)

This patent describes a process for the reduction of fly ash in a wet bottom boiler of the type having a primary and secondary furnace. It comprises collecting the fly ash from one of an electrostatic precipitator, a bag house, a cyclone collector, a multi- cyclone collector, a gravity separator and a sharply curved duct; removing the fly ash in a stream of carrier gas into the furnace; adding a fuel to the stream of carrier gas and fly ash; introducing the carrier gas and fly ash and fuel into one of the primary and secondary furnaces, wherein the fuel and the heat from at least one of the surrounding gas and molten slag provide energy to melt the fly ash; and discharging the melted fly ash with slag from the furnace bottom.

Breen, B.P.; Schrecengost, R.A.; Gabrielson, J.E.

1991-09-03T23:59:59.000Z

450

Choosing the right boiler air fans at Weston 4  

SciTech Connect (OSTI)

When it came to choosing the three 'big' boiler air fans - forced draft, induced draft and primary air, the decision revolved around efficiency. The decision making process for fan selection for the Western 4 supercritical coal-fired plant is described in this article. 3 photos.

Spring, N.

2009-04-15T23:59:59.000Z

451

CHP: It's Time for Combined Heat and Power  

E-Print Network [OSTI]

and export 16. Creates local jobs for installation, operation and maintenance 17. Supports competitive electricity market structure General Conclusion It is very much in the PUBLIC interest to support CHP distributed energy even if the private incentives... of use Electricity Electricity Heat Heat Combined Heat and Power Conventional Generation Building Load Power Plant fuel (66 units of remote energy) Boiler fuel (34 units of on-site energy) CHP fuel (x units of on-site energy) Losses Losses 20 29 20...

Herweck, R.

452

A Study of the Use of Jatropha Oil Blends in Boilers  

SciTech Connect (OSTI)

Executive Summary: This project investigated the combustion performance of blends of unrefined Jatropha oil and its blends in laboratory boilers. Although a very limited amount of testing blends in distillate oil, ASTM No. 2 oil or heating oil was conducted, the primary interest was in testing the performance of blends with residual ASTM No. 6 oil. The basic idea is to provide a renewable fuel option to residual oil used in space heating and in industrial applications. The intent also was to explore the use of non-edible plant oil and one that might be potentially cheaper than biodiesel. The characteristics of No. 6 oil, such as high viscosity at ambient temperature, which requires it to be kept heated, make the blending with such oils feasible. Jatropha oil is one such oil and there is currently considerable interest building up in its use as a source for making biodiesel and jet fuel. A 10% blend of Jatropha oil with heating oil was burned using a standard burner in a residential boiler. Combustion performance was shown to be comparable with that of burning heating oil by itself with some noticeable differences. Typical heating oil has about 2000 ppm of sulfur, while the Jatropha oil has about 50 ppm leading to lower levels of sulphur dioxide emissions. Stack measurements also showed that the NOx emission was lower with the blend. We have previously reported similar reductions in NOx with blends of biodiesel in heating oil as well as slight reductions in PM2.5, particulates below 2.5 microns in size. Long term tests were not part of this project and hence deleterious effects on pumps, seals etc., if any, were not measured. The majority of the work involved testing blends of Jatropha oil with residual oil in a 1.5 million Btu/hr boiler with a burner modified to burn residual oil. Blends of 20 and 60% Jatropha oil and 100% Jatropha oil were burned in the combustion performance tests. The residual oil used had a sulfur content of over 2000 ppm and hence dramatic reductions in sulfur dioxide emissions are measured with the blends. Again, consistent with our past experience with biodiesel blends, significant reductions in nitrogen oxide emissions nearing 50% with 100% Jatropha oil, were also measured. This is in contrast with the use of biodiesel in diesel engines, where the NOx has a tendency to increase. In addition to the gaseous emission measurements, particulate emissions were measured using an EPA CTM-39 system to obtain both particulates, of sizes below 2.5 microns, so-called PM2.5, and of sizes larger than 2.5 microns. The results show that the particulate emissions are lower with the blending of Jatropha oil. Overall, one can conclude that the blending of Jatropha oil with residual oil is a feasible approach to using non-edible plant oil to provide a renewable content to residual oil, with significant benefits in the reduction of pollutant emissions such as sulfur dioxide, nitrogen oxides and particulates.

Krishna, C.R.

2010-10-01T23:59:59.000Z

453

Recovery Act: Oxy-Combustion Technology Development for Industrial-Scale Boiler Applications  

SciTech Connect (OSTI)

This Topical Report outlines guidelines and key considerations for design and operation of pulverized coal-fired boilers for oxy-combustion. The scope addressed includes only the boiler island, not the entire oxy-fired CO{sub 2} capture plant. These guidelines are primarily developed for tangential-fired boilers and focus on designs capable of dual air and oxy-fired operation. The guidelines and considerations discussed are applicable to both new units and existing boiler retrofits. These guidelines are largely based on the findings from the extensive 15 MW{sub th} pilot testing and design efforts conducted under this project. A summary level description is provided for each major aspect of boiler design impacted by oxy-combustion, and key considerations are discussed for broader application to different utility and industrial designs. Guidelines address the boiler system arrangement, firing system, boiler thermal design, ducting, materials, control system, and other key systems.

Levasseur, Armand

2014-01-01T23:59:59.000Z

454

NOx CONTROL OPTIONS AND INTEGRATION FOR US COAL FIRED BOILERS  

SciTech Connect (OSTI)

This is the fifth Quarterly Technical Report for DOE Cooperative Agreement No: DE-FC26-00NT40753. The goal of the project is to develop cost effective analysis tools and techniques for demonstrating and evaluating low NOx control strategies and their possible impact on boiler performance for firing US coals. The Electric Power Research Institute (EPRI) is providing cofunding for this program. This program contains multiple tasks and good progress is being made on all fronts. Field tests for NOx reduction in a cyclone fired utility boiler due to using Rich Reagent Injection (RRI) have been started. CFD modeling studies have been started to evaluate the use of RRI for NOx reduction in a corner fired utility boiler using pulverized coal. Field tests of a corrosion monitor to measure waterwall wastage in a utility boiler have been completed. Computational studies to evaluate a soot model within a boiler simulation program are continuing. Research to evaluate SCR catalyst performance has started. A literature survey was completed. Experiments have been outlined and two flow reactor systems have been designed and are under construction. Commercial catalyst vendors have been contacted about supplying catalyst samples. Several sets of new experiments have been performed to investigate ammonia removal processes and mechanisms for fly ash. Work has focused on a promising class of processes in which ammonia is destroyed by strong oxidizing agents at ambient temperature during semi-dry processing (the use of moisture amounts less than 5 wt-%). Both ozone and an ozone/peroxide combination have been used to treat both basic and acidic ammonia-laden ashes.

Mike Bockelie; Marc Cremer; Kevin Davis; Connie Senior; Bob Hurt; Eric Eddings; Larry Baxter

2001-10-10T23:59:59.000Z

455

Computational Modeling and Assessment Of Nanocoatings for Ultra Supercritical Boilers  

SciTech Connect (OSTI)

Coal-fired power plants are a significant part of the nation???¢????????s power generating capacity, currently accounting for more than 55% of the country???¢????????s total electricity production. Extending the reliable lifetimes of fossil fired boiler components and reducing the maintenance costs are essential for economic operation of power plants. Corrosion and erosion are leading causes of superheater and reheater boiler tube failures leading to unscheduled costly outages. Several types of coatings and weld overlays have been used to extend the service life of boiler tubes; however, the protection afforded by such materials was limited approximately one to eight years. Power companies are more recently focused in achieving greater plant efficiency by increasing steam temperature and pressure into the advanced-ultrasupercritical (A-USC) condition with steam temperatures approaching 760???????°C (1400???????°F) and operating pressures in excess of 35MPa (5075 psig). Unfortunately, laboratory and field testing suggests that the resultant fireside environment when operating under A-USC conditions can potentially cause significant corrosion to conventional and advanced boiler materials1-2. In order to improve reliability and availability of fossil fired A-USC boilers, it is essential to develop advanced nanostructured coatings that provide excellent corrosion and erosion resistance without adversely affecting the other properties such as toughness and thermal fatigue strength of the component material.

David W. Gandy; John P. Shingledecker

2011-05-11T23:59:59.000Z

456

ADVANCED, LOW/ZERO EMISSION BOILER DESIGN AND OPERATION  

SciTech Connect (OSTI)

This document reviews the work performed during the quarter January-March 2003. The main objectives of the project are: To demonstrate the feasibility of the full-oxy combustion with flue gas recirculation on Babcock & Wilcox's 1.5MW pilot boiler, To measure its performances in terms of emissions and boiler efficiency while selecting the right oxygen injection strategies, To perform an economical feasibility study, comparing this solution with alternate technologies, and To design a new generation, full oxy-fired boiler. The main objective of this quarter was to initiate the project, primarily the experimental tasks. The contractor and its subcontractors have defined a working plan, and the first tasks have been started. Task 1 (Site Preparation) is now in progress, defining the modifications to be implemented to the boiler and oxygen delivery system. The changes are required in order to overcome some current limitations of the existing system. As part of a previous project carried out in 2002, several changes have already been made on the pilot boiler, including the enrichment of the secondary and tertiary air with oxygen or the replacement of these streams with oxygen-enriched recycled flue gas. A notable modification for the current project involves the replacement of the primary air with oxygen-enriched flue gas. Consequently, the current oxygen supply and flue gas recycle system is being modified to meet this new requirement. Task 2 (Combustion and Emissions Performance Optimization) has been initiated with a preliminary selection of four series of tests to be performed. So far, the project schedule is on-track: site preparation (Task 1) should be completed by August 1st, 2003 and the tests (Task 2) are planned for September-October 2003. The Techno-Economic Study (Task 3) will be initiated in the following quarter.

Ovidiu Marin; Fabienne Chatel-Pelage

2003-04-01T23:59:59.000Z

457

Superheater Corrosion In Biomass Boilers: Today's Science and Technology  

SciTech Connect (OSTI)

This report broadens a previous review of published literature on corrosion of recovery boiler superheater tube materials to consider the performance of candidate materials at temperatures near the deposit melting temperature in advanced boilers firing coal, wood-based fuels, and waste materials as well as in gas turbine environments. Discussions of corrosion mechanisms focus on the reactions in fly ash deposits and combustion gases that can give corrosive materials access to the surface of a superheater tube. Setting the steam temperature of a biomass boiler is a compromise between wasting fuel energy, risking pluggage that will shut the unit down, and creating conditions that will cause rapid corrosion on the superheater tubes and replacement expenses. The most important corrosive species in biomass superheater corrosion are chlorine compounds and the most corrosion resistant alloys are typically FeCrNi alloys containing 20-28% Cr. Although most of these materials contain many other additional additions, there is no coherent theory of the alloying required to resist the combination of high temperature salt deposits and flue gases that are found in biomass boiler superheaters that may cause degradation of superheater tubes. After depletion of chromium by chromate formation or chromic acid volatilization exceeds a critical amount, the protective scale gives way to a thick layer of Fe{sub 2}O{sub 3} over an unprotective (FeCrNi){sub 3}O{sub 4} spinel. This oxide is not protective and can be penetrated by chlorine species that cause further acceleration of the corrosion rate by a mechanism called active oxidation. Active oxidation, cited as the cause of most biomass superheater corrosion under chloride ash deposits, does not occur in the absence of these alkali salts when the chloride is present as HCl gas. Although a deposit is more corrosive at temperatures where it is molten than at temperatures where it is frozen, increasing superheater tube temperatures through the measured first melting point of fly ash deposits does not necessarily produce a step increase in corrosion rate. Corrosion rate typically accelerates at temperatures below the first melting temperature and mixed deposits may have a broad melting temperature range. Although the environment at a superheater tube surface is initially that of the ash deposits, this chemistry typically changes as the deposits mature. The corrosion rate is controlled by the environment and temperature at the tube surface, which can only be measured indirectly. Some results are counter-intuitive. Two boiler manufacturers and a consortium have developed models to predict fouling and corrosion in biomass boilers in order to specify tube materials for particular operating conditions. It would be very useful to compare the predictions of these models regarding corrosion rates and recommended alloys in the boiler environments where field tests will be performed in the current program. Manufacturers of biomass boilers have concluded that it is more cost-effective to restrict steam temperatures, to co-fire biofuels with high sulfur fuels and/or to use fuel additives rather than try to increase fuel efficiency by operating with superheater tube temperatures above melting temperature of fly ash deposits. Similar strategies have been developed for coal fired and waste-fired boilers. Additives are primarily used to replace alkali metal chloride deposits with higher melting temperature and less corrosive alkali metal sulfate or alkali aluminum silicate deposits. Design modifications that have been shown to control superheater corrosion include adding a radiant pass (empty chamber) between the furnace and the superheater, installing cool tubes immediately upstream of the superheater to trap high chloride deposits, designing superheater banks for quick replacement, using an external superheater that burns a less corrosive biomass fuel, moving circulating fluidized bed (CFB) superheaters from the convective pass into the hot recirculated fluidizing medium and adding an insulating layer to superh

Sharp, William (Sandy) [SharpConsultant

2011-12-01T23:59:59.000Z

458

Multi-Fuel Boiler Efficiency Calculations  

E-Print Network [OSTI]

to calculate the heat losses, a complete stack analysis is required. In 1956 when Buna's paper was published, stack analysis was done by Orsat analysis which gave the composition of carbon dioxide, carbon monoxide and oxygen. Nitrogen was assumed to make... up the difference. It was known that sulfur dioxide (if present) would be absorbed with carbon dioxide. Table 2 shows the components in the stack gas and the analysis of the combustion air. The total analysis of the stack gas is estimated by a...

Likins, M. R., Jr.

1984-01-01T23:59:59.000Z

459

Coal-water slurry fuel combustion testing in an oil-fired industrial boiler. Semiannual technical progress report, February 15--August 15, 1996  

SciTech Connect (OSTI)

The project consists of four phases: (1) design, permitting, and test planning, (2) construction and start up, (3) demonstration and evaluation (1,000-hour demonstration), and (4) expanded demonstration and evaluation (installing a CWSF preparation circuit, performing baseline tests firing No. 6 fuel oil, and conducting additional CWSF testing). The boiler testing and evaluation will determine if the CWSF combustion characteristics, heat release rate, fouling and slagging behavior, corrosion and erosion tendencies, and fuel transport, storage, and handling characteristics can be accommodated in a boiler system designed to fire heavy fuel oil. In addition, the proof-of-concept demonstration will generate data to determine how the properties of a CWSF and its parent coal affect boiler performance. The economic factors associated with retrofitting boilers is also evaluated. The first three phases have been completed and the combustion performance of the burner that was provided with the boiler did not meet performance goals. A maximum coal combustion efficiency of 95% (compared to a target of 98%) was achieved and natural gas cofiring (15% of the total thermal input) was necessary to maintain a stable flame. Consequently, the first demonstration was terminated after 500 hours. The second CWSF demonstration (Phase 4) was conducted with a proven coal-designed burner. Prior to starting the second demonstration, a CWSF preparation circuit was constructed to provide flexibility in CWSF production. The circuit initially installed involved single-stage grinding. A regrind circuit was recently installed and was evaluated. A burner was installed from ABB Combustion Engineering (ABB/CE) and was used to generate baseline data firing No. 6 fuel oil and fire CWSF. A temporary storage system for No. 6 fuel oil was installed and modifications to the existing CWSF handling and preheating system were made to accommodate No. 6 oil.

Miller, B.G.; Scaroni, A.W.

1997-06-03T23:59:59.000Z

460

Advanced, Low/Zero Emission Boiler Design and Operation  

SciTech Connect (OSTI)

In partnership with the U.S. Department of Energy's National Energy Technology Laboratory, B&W and Air Liquide are developing and optimizing the oxy-combustion process for retrofitting existing boilers as well as new plants. The main objectives of the project is to: (1) demonstrate the feasibility of the oxy-combustion technology with flue gas recycle in a 5-million Btu/hr coal-fired pilot boiler, (2) measure its performances in terms of emissions and boiler efficiency while selecting the right oxygen injection and flue gas recycle strategies, and (3) perform technical and economic feasibility studies for application of the technology in demonstration and commercial scale boilers. This document summarizes the work performed during the period of performance of the project (Oct 2002 to June 2007). Detailed technical results are reported in corresponding topical reports that are attached as an appendix to this report. Task 1 (Site Preparation) has been completed in 2003. The experimental pilot-scale O{sub 2}/CO{sub 2} combustion tests of Task 2 (experimental test performance) has been completed in Q2 2004. Process simulation and cost assessment of Task 3 (Techno-Economic Study) has been completed in Q1 2005. The topical report on Task 3 has been finalized and submitted to DOE in Q3 2005. The calculations of Task 4 (Retrofit Recommendation and Preliminary Design of a New Generation Boiler) has been completed in 2004. In Task 6 (engineering study on retrofit applications), the engineering study on 25MW{sub e} unit has been completed in Q2, 2008 along with the corresponding cost assessment. In Task 7 (evaluation of new oxy-fuel power plants concepts), based on the design basis document prepared in 2005, the design and cost estimate of the Air Separation Units, the boiler islands and the CO{sub 2} compression and trains have been completed, for both super and ultra-supercritical case study. Final report of Task-7 is published by DOE in Oct 2007.

Babcock/Wilcox; Illinois State Geological; Worley Parsons; Parsons Infrastructure/Technology Group

2007-06-30T23:59:59.000Z

Note: This page contains sample records for the topic "district heat boilers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Fluidized bed boiler having a segmented grate  

DOE Patents [OSTI]

A fluidized bed furnace (10) is provided having a perforate grate (9) within a housing which supports a bed of particulate material including some combustibles. The grate is divided into a plurality of segments (E2-E6, SH1-SH5, RH1-RH5), with the airflow to each segment being independently controlled. Some of the segments have evaporating surface imbedded in the particulate material above them, while other segments are below superheater surface or reheater surface. Some of the segments (E1, E7) have no surface above them, and there are ignitor combustors (32, 34) directed to fire into the segments, for fast startup of the furnace without causing damage to any heating surface.

Waryasz, Richard E. (Longmeadow, MA)

1984-01-01T23:59:59.000Z

462

Characterization of Oxy-combustion Impacts in Existing Coal-fired Boilers  

SciTech Connect (OSTI)

This report summarizes Year 1 results of a research program designed to use multi-scale experimental studies and fundamental theoretical models to characterize and predict the impacts of retrofit of existing coal-fired utility boilers for oxy-combustion. Through the course of Year 1 activities, great progress was made toward understanding the issues associated with oxy-combustion retrofit of coal-fired boilers. All four Year 1 milestones and objectives have been, or will be, completed on schedule and within budget. Progress in the four milestone areas may be summarized as follows: University of Utah has performed size segregated ash composition measurements in the Oxy-Fuel Combustor (OFC). These experiments indicate that oxy-combustion retrofit may impact ash aerosol mineral matter composition. Both flame temperature and flue gas composition have been observed to influence the concentration of calcium, magnesium and iron in the fine particulate. This could in turn impact boiler fouling and slagging. Sandia National Labs has shown that char oxidation rate is dependent on particle size (for sizes between 60 and 100 microns) by performing fundamental simulations of reacting char particles. These predictions will be verified by making time-resolved optical measurements of char particle temperature, velocity and size in bench-scale experiments before the end of Year 1. REI and Siemens have completed the design of an oxy-research burner that will be mounted on University of Utahs pilot-scale furnace, the L1500. This burner will accommodate a wide range of O2, FGR and mixing strategies under conditions relevant for utility boiler operation. Through CFD modeling of the different burner designs, it was determined that the key factor influencing flame stabilization location is particle heat-up rate. The new oxy-research burner and associated equipment is scheduled for delivery before the end of Year 1. REI has completed a literature survey of slagging and fouling mechanisms in coal-fired power plants to understand key issues influencing these deposition regimes and infer their behavior under oxy-fired conditions. Based on the results of this survey, an algorithm for integrating slagging predictions into CFD models was outlined. This method accounts for ash formation, particle impaction and sticking, deposit growth and physical properties and impact of the deposit on system flow and heat transfer. A model for fouling in the back pass has also been identified which includes vaporization of sodium, deposition of sodium sulfate on fly ash particles and tube surfaces, and deposit growth rate on tubes. In Year 1, REI has also performed a review of the literature describing corrosion in order to understand the behavior of oxidation, sulfidation, chloridation, and carburization mechanisms in air-fired and oxy-combustion systems. REI and Vattenfall have met and exchanged information concerning oxy-coal combustion mechanisms for CFD simulations currently used by Vattenfall. In preparation for Year 2 of this program, two coals (North Antelope PRB, Western bituminous) have been ordered, pulverized and delivered to the University of Utah and Sandia National Labs. Materials for the corrosion experiments have been identified, suppliers located, and a schedule for equipment fabrication and shakedown has been established. Finally, a flue gas recycle system has been designed and is being constructed for the OFC.

Bradley Adams; Andrew Fry; Constance Senior; Hong Shim; Huafeng Wang; Jost Wendt; Christopher Shaddix

2009-06-30T23:59:59.000Z

463

Steam driven centrifugal pump for low cost boiler feed service  

SciTech Connect (OSTI)

This article describes a steam driven centrifugal pump for boiler feed-water and other high pressure water applications, which was awarded Top Honors in the special pumps category of the 1982 Chemical processing Vaaler competition, because the simple design with turbine, pump and controls combined in an integral unit provides high operating efficiency and reliable performance with minimal maintenance. Single source responsibility for all components when the pump may have to be serviced is another advantage. These features meet the requirements for boiler feed pumps that are critical to maintaining a consistent steam supply in a process plant where downtime can be extremely expensive. The annual cost to operate the pump for 8000 hours is about $100,000, if electricity costs 5 cents/kwh. These pumps can be run for about $30,000 on steam, if natural gas costs $4.00/mcf. Cost savings are $70,000 annually.

Not Available

1982-11-01T23:59:59.000Z

464

Thermal Behavior of Floor Tubes in a Kraft Recovery Boiler  

SciTech Connect (OSTI)

The temperatures of floor tubes in a slope-floored black liquor recovery boiler were measured using an array of thermocouples located on the tube crowns. It was found that sudden, short duration temperature increases occurred with a frequency that increased with distance from the spout wall. To determine if the temperature pulses were associated with material falling from the convective section of the boiler, the pattern of sootblower operation was recorded and compared with the pattern of temperature pulses. During the period from September, 1998, through February, 1999, it was found that more than 2/3 of the temperature pulses occurred during the time when one of the fast eight sootblowers, which are directed at the back of the screen tubes and the leading edge of the first superheater bank, was operating.

Barker, R.E.; Choudhury, K.A.; Gorog, J.P.; Hall, L.M.; Keiser, J.R.; Sarma, G.B.

1999-09-12T23:59:59.000Z

465

Condensing Heat Exchanger for Optimization of Energy Efficiency  

E-Print Network [OSTI]

Historically, boiler efficiency has been limited due to the minimum temperature allowed at the stack. Heat lost up the stack was in exchange for keeping the flue gas temperature above the water vapor dew point. If water vapor was allowed to condense...

Carrigan, J. F.; Johnson, D. W.; DiVitto, J. G.; Schulze, K. H.

466

Evaluating Water Transfers in Irrigation Districts  

E-Print Network [OSTI]

The participation of irrigation districts (IDs) in surface water transfers from agriculture-to-municipal uses is studied by examining IDs economic and political behavior, comparing their performance with non-districts (non-IDs), and analyzing...

Ghimire, Narishwar

2013-04-11T23:59:59.000Z

467

UNITED STATES DISTRICT COURT FOR THE DISTRICT OF COLUMBIA  

E-Print Network [OSTI]

___________________________________ ) THE HUMANE SOCIETY OF THE ) UNITED STATES, et al., ) ) Plaintiffs, ) ) v. ) Civil Action No. 05-1392 (ESH amendments be vacated; it is Case 1:05-cv-01392-ESH Document 29 Filed 05/26/2006 Page 1 of 2 #12;FURTHER/ ELLEN SEGAL HUVELLE United States District Judge Date: May 26, 2006 Case 1:05-cv-01392-ESH Document 29

468

Wood/coal cofiring in industrial stoker boilers  

SciTech Connect (OSTI)

Realizing that a significant reduction in the global emissions of fossil carbon dioxide may require the installation of a wide variety of control technologies, options for large and small boilers are receiving attention. With over 1,500 coal-fired stoker boilers in the US, biomass co-firing is of interest, which would also open markets for waste wood which is presently landfilled at significant costs ranging from $20--200/ton. While much cofiring occurs inside the fence, where industrial firms burn wastes in their site boilers, other opportunities exist. Emphasis has been placed on stoker boilers in the northeastern US, where abundant supplies of urban wood waste are generally known to exist. Broken pallets form a significant fraction of this waste. In 1997, the cofiring of a volumetric mixture of 30% ground broken pallet material and 70% coal was demonstrated successfully at the traveling-grate stoker boilerplant of the Pittsburgh Brewing Company. Fourteen test periods, with various wood/coal mixtures blended on site, and two extended test periods, using wood/coal mixtures blended at the coal terminal and transported by truck to the brewery, were conducted. The 30% wood/70% coal fuel was conveyed through the feed system without difficulty, and combusted properly on the grate while meeting opacity requirements with low SO{sub 2} and NO{sub x} emissions. Efforts are underway to commercialize a wood/coal blend at the brewery, to identify specific urban wood supplies in the Pittsburgh region and to conduct a demonstration at a spreader stoker.

Cobb, J.T. Jr.; Elder, W.W.; Freeman, M.C.

1999-07-01T23:59:59.000Z

469

Covered Product Category: Commercial Boilers | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in Review: Top FiveDepartmentfor EngineeringDepartment ofBoilers Covered Product Category:

470

University of the District of Columbia District of Columbia Drinking Water Blind Taste  

E-Print Network [OSTI]

University of the District of Columbia District of Columbia Drinking Water Blind Taste Testing for Nutrition, Diet and Health Cooperative Extension Service University of the District of Columbia Dawanna University of the District of Columbia Date: May 2005 Prepared for the DC Water Resources Research Institute

District of Columbia, University of the

471

The environmental impact of orimulsion combustion in large utility boilers  

SciTech Connect (OSTI)

There is considerable worldwide interest in the practical use of Orimulsion as a replacement fuel in both oil and coal fired utility boilers. Practical experience of such applications has been gained in Canada, UK, Japan, Europe and USA. Fundamental work has demonstrated the different combustion characteristics of Orimulsion which has been termed the {open_quotes}fourth{close_quotes} fossil fuel to the fossil fuels normally used for power generation and how, in certain circumstances, these can be used to advantage in the application of Orimulsion in utility boiler combustion systems. Orimulsion is an emulsify ed fuel prepared from naturally occurring bitumen deposits located in the Orinoco Basin in Venezuela and comprises approximately 70% bitumen and 30% water. Compared to the heavier fuel oils the sulphur content of Orimulsion is medium to high, the ash content is high with high levels of Vanadium and Nickel. The ash content is enhanced by the addition of Magnesium compounds, to the commercial fuel, to mitigate against the potential in boiler corrosion effects arising form the Va, Na and S content in the fuel.

Allen, J.W.; Beal, P.R. [International Combustion Ltd., Derby (United Kingdom)

1997-07-01T23:59:59.000Z

472

Vacant District Chair Positions (as of 1/28/2014)  

E-Print Network [OSTI]

) District 83 ­ Kings County (Visalia) District 84 ­ Tulare County (Porterville) REGION 12: INLAND EMPIRE: NORTHERN CALIFORNIA District 10/11 ­ Siskiyou County, Humboldt & Eureka Counties District 13 ­ Modoc, Lassen, Plumas Counties District 15 ­ Yuba & Sutter Counties District 16 ­ Tri-County Area (includes Red

Cohen, Ronald C.

473

Successful Application of Heat Pumps to a DHC System in the Tokyo Bay Area  

E-Print Network [OSTI]

The Harumi-Island District Heating & Cooling (DHC), which is located in the Tokyo Bay area, introduced the heat pump and thermal storage system with the aim of achieving minimum energy consumption, minimum environmental load, and maximum economical...

Yanagihara, R.; Okagaki, A.

2006-01-01T23:59:59.000Z

474

Downtown district cooling: A 21st century approach  

SciTech Connect (OSTI)

On December 1, 1992, the Board of Directors of the Metropolitan Pier and Exposition Authority (MPEA) met on Chicago`s historic Navy Pier and ushered in a new era of competition for energy supply in Chicago. The MPEA, a state agency created for the purposes of promoting and operating fair and exposition facilities within the Chicago area (including the McCormick Place exposition center and Navy Pier), voted to accept a third-party proposal to provide district heating and cooling services to the existing McCormick Place facilities and a million square feet of new exposition space. The winning bidder was a joint venture between Trigen Energy, the nation`s largest provider of district energy services, and Peoples Gas, the gas distribution company which serves Chicago. This vote culminated two years of effort by the Energy Division of Chicago`s Department of Environment to analyze the feasibility and promote the implementation of a district energy system to serve the expanded McCormick Place and its environs in the South Loop neighborhood. Initial services began in November, 1993, with a new hot and cold water piping system interconnecting the three existing exhibition facilities. The final buildout of the system, with a combined peak demand predicted at 160 MMBtu of heating and 15,920 tons of and cooling, is scheduled for completion in the summer of 1997.

NONE

1995-12-01T23:59:59.000Z

475

The Department of Energy Program for Development of Industrial Heat Recovery Equipment  

E-Print Network [OSTI]

equipment development is carried out primarily in the areas of recuperators and heat pumps, with some work in organic Rankine cycle power units and novel waste heat boilers. The Department is sponsoring basic work in heat exchanger design which includes... better under standing of heat transfer mechanism, fouling mechanisms and flow induced vibrations, development of corrosion resistant materials, and de-scaling techniques. A successful demonstration of a metallic cross and counter-flow recuperator...

Eustis, J. N.

1979-01-01T23:59:59.000Z

476

Computational Modeling and Assessment Of Nanocoatings for Ultra Supercritical Boilers  

SciTech Connect (OSTI)

Forced outages and boiler unavailability in conventional coal-fired fossil power plants is most often caused by fireside corrosion of boiler waterwalls. Industry-wide, the rate of wall thickness corrosion wastage of fireside waterwalls in fossil-fired boilers has been of concern for many years. It is significant that the introduction of nitrogen oxide (NOx) emission controls with staged burners systems has increased reported waterwall wastage rates to as much as 120 mils (3 mm) per year. Moreover, the reducing environment produced by the low-NOx combustion process is the primary cause of accelerated corrosion rates of waterwall tubes made of carbon and low alloy steels. Improved coatings, such as the MCrAl nanocoatings evaluated here (where M is Fe, Ni, and Co), are needed to reduce/eliminate waterwall damage in subcritical, supercritical, and ultra-supercritical (USC) boilers. The first two tasks of this six-task project-jointly sponsored by EPRI and the U.S. Department of Energy (DE-FC26-07NT43096)-have focused on computational modeling of an advanced MCrAl nanocoating system and evaluation of two nanocrystalline (iron and nickel base) coatings, which will significantly improve the corrosion and erosion performance of tubing used in USC boilers. The computational model results showed that about 40 wt.% is required in Fe based nanocrystalline coatings for long-term durability, leading to a coating composition of Fe-25Cr-40Ni-10 wt.% Al. In addition, the long term thermal exposure test results further showed accelerated inward diffusion of Al from the nanocrystalline coatings into the substrate. In order to enhance the durability of these coatings, it is necessary to develop a diffusion barrier interlayer coating such TiN and/or AlN. The third task 'Process Advanced MCrAl Nanocoating Systems' of the six-task project jointly sponsored by the Electric Power Research Institute, EPRI and the U.S. Department of Energy (DE-FC26-07NT43096)- has focused on processing of advanced nanocrystalline coating systems and development of diffusion barrier interlayer coatings. Among the diffusion interlayer coatings evaluated, the TiN interlayer coating was found to be the optimum one. This report describes the research conducted under the Task 3 workscope.

David W. Gandy; John P. Shingledecker

2011-04-11T23:59:59.000Z

477

Design of an expert system to aid in the selection of a wood fired boiler system.  

E-Print Network [OSTI]

??Currently most industrial and institutional facilities rely on fossil fuels to power their boiler systems. As the quantity of these non-renewable resources is depleted, and (more)

Morris, Melissa L.

2008-01-01T23:59:59.000Z

478

A methodology for in-situ calibration of steam boiler instrumentation.  

E-Print Network [OSTI]

??This thesis presents a broadly useful diagnostic methodology to engineers and plant managers for finding the in-situ operating characteristics of power plant boilers when metered (more)

Wei, Guanghua

2012-01-01T23:59:59.000Z

479

Second law analysis of a natural gas-fired steam boiler and cogeneration plant.  

E-Print Network [OSTI]

??A second law thermodynamic analysis of a natural gas-fired steam boiler and cogeneration plant at Rice University was conducted. The analysis included many components of (more)

Conklin, Eric D

2010-01-01T23:59:59.000Z

480

Planning and setup for the implementation of coal and wood co-fired boilers.  

E-Print Network [OSTI]

??Coal and wood co-fired boiler technology has been significantly advancing in the past years, but many of their capabilities remain unknown to much of the (more)

Gump, Christopher D.

2007-01-01T23:59:59.000Z