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Note: This page contains sample records for the topic "district heating system" 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

Geothermal district heating systems  

SciTech Connect

Ten district heating demonstration projects and their present status are described. The projects are Klamath County YMCA, Susanville District Heating, Klamath Falls District Heating, Reno Salem Plaza Condominium, El Centro Community Center Heating/Cooling, Haakon School and Business District Heating, St. Mary's Hospital, Diamond Ring Ranch, Pagosa Springs District Heating, and Boise District Heating.

Budney, G.S.; Childs, F.

1982-01-01T23:59:59.000Z

2

BSU GHP District Heating and Cooling System (Phase I) | Department...  

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

BSU GHP District Heating and Cooling System (Phase I) BSU GHP District Heating and Cooling System (Phase I) Project objectives: Create a campus geothermal heating and cooling...

3

Buffalo district heating system design and construction  

SciTech Connect

This report addresses the introduction of district heating in Buffalo, NY from feasibility study to implementation. The reemergence of district heating in the US and associated advantages are reviewed. Advanced piping technology which has enabled district heating to compete economically with alternative technologies is summarized. Identification and analysis of the customer heat load considered in downtown Buffalo for the pilot system and future expansion is discussed. Various options for initiating construction of a district heating system were considered as exemplified by the configuration for the pilot system which was selected to serve five downtown buildings. A conceptual plan is presented which permits the system to expand in an economically viable manner. The report concludes with an economic analysis which simulates the operation and expansion of the system. 4 figs., 8 tabs.

Oliker, I.

1987-11-01T23:59:59.000Z

4

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

Open Energy Info (EERE)

Last modified on July 22, 2011. Project Title Cedarville School District Retrofit of Heating and Cooling Systems with Geothermal Heat Pumps and Ground Source Water Loops Project...

5

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...

6

BSU GHP District Heating and Cooling System (Phase I)  

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

BSU GHP District Heating and Cooling System (Phase I) James Lowe Ball State University May 03, 2010 This presentation does not contain any proprietary confidential, or otherwise...

7

Podhale (South Poland) geothermal district heating system  

Science Journals Connector (OSTI)

The search for geothermal resources in the Podhale Region began in the late 1980s. The Banska IG-1 well, drilled in 1981, served as the starting point for an expansion of those research activities. A geothermal pilot plant was put into operation in 1993. During that same year the company Geotermia Podhalanska (GP) was founded and the pilot project, including the first distribution network for 20 customers, was constructed. After the initial phase of project implementation from 1993 to 1995, during which a pilot plant was constructed and put into operation for demonstration purposes by the Polish Academy for Sciences using the first geothermal doublet (a production well in Banska Nizna and a reinjection well in Bialy Dunajec), and connection of 200 households through a small district heating network, the World Bank got involved in the geothermal district heating project. Since then, significant progress has been made, increasing the overall heat capacity and geothermal output as well as the service area to the City of Zakopane, approx. 14 km from the production wells. In November 2001 the first geothermal heat was delivered to customers in Zakopane.

Piotr Dlugosz

2003-01-01T23:59:59.000Z

8

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

9

First university owned district heating system using biomass heat  

E-Print Network (OSTI)

Components 4.3 m diameter gasifier 4.4 MW flue gas boiler 60 t hog fuel storage Electrostatic precipitator Residue Gasifier Oxidizer Flue Gas Boiler Electrostatic Precipitator Heat to campus district energy loop

Northern British Columbia, University of

10

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...

11

New energy and exergy parameters for geothermal district heating systems  

Science Journals Connector (OSTI)

This paper introduces four new parameters, namely energetic renewability ratio, exergetic renewability ratio, energetic reinjection ratio, and exergetic reinjection ratio for geothermal district energy systems. These parameters are applied to Edremit Geothermal District Heating System (GDHS) in Balikesir, Turkey for daily, monthly and yearly assessments and their variations are studied. In addition, the actual data are regressed to obtain some applied correlations for practical use. Some results follow: (i) Both energetic and exergetic renewability ratios decrease with decreasing temperature in heating season and increasing temperature in the summer. (ii) Both energetic and exergetic reinjection ratios increase with decreasing temperature for heating season and increase with increasing temperature for summer season.

C. Coskun; Zuhal Oktay; I. Dincer

2009-01-01T23:59:59.000Z

12

Simulation and analysis of district-heating and -cooling systems  

SciTech Connect

A computer simulation model, GEOCITY, was developed to study the design and economics of district heating and cooling systems. GEOCITY calculates the cost of district heating based on climate, population, energy source, and financing conditions. The principal input variables are minimum temperature, heating degree-days, population size and density, energy supply temperature and distance from load center, and the interest rate. For district cooling, maximum temperature and cooling degree-hours are required. From this input data the model designs the fluid transport and district heating systems. From this design, GEOCITY calculates the capital and operating costs for the entire system. GEOCITY was originally developed to simulate geothermal district heating systems and thus, in addition to the fluid transport and distribution models, it includes a reservoir model to simulate the production of geothermal energy from geothermal reservoirs. The reservoir model can be adapted to simulate the supply of hot water from any other energy source. GEOCITY has been used extensively and has been validated against other design and cost studies. GEOCITY designs the fluid transport and distribution facilities and then calculates the capital and operating costs for the entire system. GEOCITY can simulate nearly any financial and tax structure through varying the rates of return on equity and debt, the debt-equity ratios, and tax rates. Both private and municipal utility systems can be simulated.

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

1983-03-01T23:59:59.000Z

13

Exergoeconomic evaluation on the optimum heating circuit system of Simav geothermal district heating system  

Science Journals Connector (OSTI)

Simav is one of the most important 15 geothermal areas in Turkey. It has several geothermal resources with the mass flow rate ranging from 35 to 72 kg/s and temperature from 88 to 148 °C. Hence, these geothermal resources are available to use for several purposes, such as electricity generation, district heating, greenhouse heating, and balneological purposes. In Simav, the 5000 residences are heated by a district heating system in which these geothermal resources are used. Beside this, a greenhouse area of 225,000 m2 is also heated by geothermal. In this study, the working conditions of the Simav geothermal district heating system have been optimized. In this paper, the main characteristics of the system have been presented and the impact of the parameters of heating circuit on the system are investigated by the means of energy, exergy, and life cycle cost (LCC) concepts. As a result, the optimum heating circuit has been determined as 60/49 °C.

Oguz Arslan; M.Arif Ozgur; Ramazan Kose; Abtullah Tugcu

2009-01-01T23:59:59.000Z

14

Cedarville School District Retrofit of Heating and Cooling Systems with  

Open Energy Info (EERE)

School District Retrofit of Heating and Cooling Systems with School District Retrofit of Heating and 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 School District Retrofit of Heating and Cooling Systems with Geothermal Heat Pumps and Ground Source Water Loops Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 1: Technology Demonstration Projects Project Description - Improve the indoor air quality and lower the cost of cooling and heating the buildings that make up the campus of Cedarville High School, Middle School and Elementary 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. - The new Heat Pumps will be targeted to perform at very high efficiency with EER (energy efficiency ratios) of 22+/-. System capacity is planned at 610 tons. - Remove unusable antiquated existing equipment and systems from the campus heating and cooling system, but utilize ductwork, piping, etc. where feasible. The campus is served by antiquated air conditioning units combined with natural gas, and with very poor EER estimated at 6+/-. - Monitor for 3 years the performance of the new systems compared to benchmarks from the existing system, and provide data to the public to promote adoption of Geothermal technology. - The Geothermal installation contractor is able to provide financing for a significant portion of project funding with payments that fall within the energy savings resulting from the new high efficiency heating and cooling systems.

15

On flow and supply temperature control in district heating systems  

Science Journals Connector (OSTI)

This paper discusses how the control of the flow and the supply temperature in district heating systems can be optimized, utilizing stochastic modelling, prediction and control methods. The main objective is to reduce heat production costs and heat losses in the transmission and distribution net by minimizing the supply temperature at the district heating plant. This control strategy is reasonable, in particular, if the heat production takes place at a combined heat and power (CHP) plant. The control strategy is subject to some restrictions, e.g. that the total heat requirement for all consumers is supplied at any time, and each individual consumer is guaranteed some minimum supply temperature at any time. Another important restriction is that the variation in time of the supply temperature is kept as small as possible. This concept has been incorporated in the program package, PRESS, developed at the Technical University of Denmark. PRESS has been applied and tested, e.g. at Vestkraft in Esbjerg, Denmark, and significant saving potentials have been documented. PRESS is now distributed by the Danish District Heating Association.

Henrik Madsen; Ken Sejling; Henning T. Søgaard; Olafur P. Palsson

1994-01-01T23:59:59.000Z

16

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...

17

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

Open Energy Info (EERE)

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

18

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...

19

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...

20

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...

Note: This page contains sample records for the topic "district heating system" 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

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,...

22

Thermodynamic analysis of a geothermal district heating system  

Science Journals Connector (OSTI)

Thermoeconomic analysis is considered a useful tool for investigators in engineering and other disciplines due to its methodology based on the quantities exergy, cost, energy and mass. This study deals with an investigation of capital costs and thermodynamic losses for devices in the Balcova Geothermal District Heating Systems (BGDHS). Thermodynamic loss rate-to-capital cost ratios are used for components and the overall system, and a systematic correlation is found between capital cost and exergy loss (total or internal), but not between capital cost and energy loss or external exergy loss. This correlation may imply that devices in successful district heating system are configured so as to achieve an overall optimal design, by balancing the thermodynamic (exergy-based) and economic characteristics of the overall system and their devices. The results provide insights into the relations between thermodynamics and economics and help demonstrate the merits of exergy analysis.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer

2005-01-01T23:59:59.000Z

23

Exergoeconomic analysis of geothermal district heating systems: A case study  

Science Journals Connector (OSTI)

An exergoeconomic study of geothermal district heating systems through mass, energy, exergy and cost accounting analyses is reported and a case study is presented for the Salihli geothermal district heating system (SGDHS) in Turkey to illustrate the present method. The relations between capital costs and thermodynamic losses for the system components are also investigated. Thermodynamic loss rate-to-capital cost ratios are used to show that, for the devices and the overall system, a systematic correlation appears to exist between capital cost and exergy loss (total or internal), but not between capital cost and energy loss or external exergy loss. Furthermore, a parametric study is conducted to determine how the ratio of thermodynamic loss rate to capital cost changes with reference temperature and to develop a correlation that can be used for practical analyses. The correlations may imply that devices in successful district heating systems such as the SGDHS are configured so as to achieve an overall optimal design, by appropriately balancing the thermodynamic (exergy-based) and economic (cost) characteristics of the overall systems and their devices.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer; Marc A. Rosen

2007-01-01T23:59:59.000Z

24

Conventional and advanced exergoeconomic analyses of geothermal district heating systems  

Science Journals Connector (OSTI)

Abstract The present study deals with analyzing, assessing and comparing conventional and advanced exergoeconomic analyses to identify the direction and potential for energy savings of a geothermal district heating system in future conditions/projections. As a real case study, the Afyon geothermal district heating system in Afyonkarahisar, Turkey, is considered while its actual operational thermal data on 8 February 2011 are utilized in the analysis, which is based on the specific exergy costing method. In this study for the first time, based on the concepts of avoidable/unavoidable and endogenous/exogenous parts, cost rates associated with both exergy destruction and capital investment of the geothermal district heating system are determined first, and the obtained results are then evaluated. The results indicate that the internal design changes play a more essential role in determining the cost of each component. The cost rate of unavoidable part within the components of the system is lower than that of the avoidable one. For the overall system, the value for the conventional exergoeconomic factor is determined to be 5.53% while that for the modified one is calculated to be 9.49%. As a result, the advanced exergoeconomic analysis makes more sense given the additional information in splitting process of the components.

Ali Keçeba?; Arif Hepbasli

2014-01-01T23:59:59.000Z

25

Geothermal district heating system feasibility analysis, Thermopolis, Wyoming  

SciTech Connect

The purpose of this study is to determine the technical and economic feasibility of constructing and operating a district heating system to serve the residential, commercial, and public sectors in Thermopolis. The project geothermal resource assessment, based on reviews of existing information and data, indicated that substantial hot water resources likely exist in the Rose Dome region 10 miles northeast of Thermopolis, and with quantities capable of supporting the proposed geothermal uses. Preliminary engineering designs were developed to serve the space heating and hot water heating demands for buildings in the Thermopolis-East Thermopolis town service area. The heating district design is based on indirect geothermal heat supply and includes production wells, transmission lines, heat exchanger units, and the closed loop distribution and collection system necessary to serve the individual customers. Three options are presented for disposal of the cooled waters-reinjection, river disposal, and agricultural reuse. The preliminary engineering effort indicates the proposed system is technically feasible. The design is sized to serve 1545 residences, 190 businesses, and 24 public buildings. The peak design meets a demand of 128.2 million Btu at production rates of 6400 gpm.

Goering, S.W.; Garing, K.L.; Coury, G.; Mickley, M.C.

1982-04-26T23:59:59.000Z

26

A key review on performance improvement aspects of geothermal district heating systems and applications  

Science Journals Connector (OSTI)

This paper deals with a comprehensive analysis and discussion of geothermal district heating systems and applications. In this regard, case studies are presented to study the thermodynamic aspects in terms of energy and exergy and performance improvement opportunities of three geothermal district heating systems, namely (i) Balcova geothermal district heating system (BGDHS), (ii) Salihli geothermal district heating system (SGDHS), and (iii) Gonen geothermal district heating system (GGDHS) installed in Turkey. Energy and exergy modeling of geothermal district heating systems for system analysis and performance evaluation are given, while their performances are evaluated using energy and exergy analysis method. Energy and exergy specifications are presented in tables. In the analysis, the actual system operational data are utilized. In comparison of the local three district heating systems with each other, it is found that the SGDHS has highest energy efficiency, while the GGDHS has highest exergy efficiency.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer

2007-01-01T23:59:59.000Z

27

Marketing the Klamath Falls Geothermal District Heating system  

SciTech Connect

The Klamath Falls Geothermal District Heating system was completed in 1981 and, until 1992, there was no formal marketing plan for the system. This lack of marketing and the system history of poor availability combined to reduce or eliminate interest in connecting on the part of local building owners and it served only the original 14 government buildings connected at start up. The revenue from these buildings, however, did not cover the entire cost of operating the system. As a result, the city was faced with a difficult decision - develop the revenue required to make the system self-supporting or shut it down. As a result, a marketing strategy for the system was developed. A flat rate was developed in which the rate is negotiable, but for most customers approximates 50% of the gas bill. In addition, the flat rate reduced customer retrofit costs because it is not necessary to buy a meter. Finally, the flat rate is a guaranteed value for the first 10 years of the contract. To reduce retrofit costs, the new marketing plan eliminates the requirement for a customer heat exchanger. New customers are now connected directly into the distribution system with district loop water used as the building heating medium. The state operates two programs which have been used in the marketing plan. The first of these is available only to taxable entities and is referred to as the Business Energy Tax Credit (BETC). This program offers business a 35% tax credit on the costs associated with connection to the geothermal district heat system (retrofit, design, permits, etc.). The second state program is the Small Energy Loan Program (SELP). This program will loan the entire cost of the energy project to the customer. The new marketing strategy for the Klamath Falls system has concentrated on offering the customer an attractive and easy to understand rate structure, reduced retrofit cost and complexity for this building along with an attractive package of financing and tax credits. 1 tab.

Rafferty, K. (Geo-Heat Center, Klamath Falls, OR (United States))

1993-08-01T23:59:59.000Z

28

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

SciTech Connect

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

29

Heat exchanger optimization for geothermal district heating systems: A fuel saving approach  

Science Journals Connector (OSTI)

One of the most commonly used heating devices in geothermal systems is the heat exchanger. The output conditions of heat exchangers are based on several parameters. The heat transfer area is one of the most important parameters for heat exchangers in terms of economics. Although there are a lot of methods to optimize heat exchangers, the method described here is a fairly easy approach. In this paper, a counter flow heat exchanger of geothermal district heating system is considered and optimum design values, which provide maximum annual net profit, for the considered heating system are found according to fuel savings. Performance of the heat exchanger is also calculated. In the analysis, since some values are affected by local conditions, Turkey's conditions are considered.

Ahmet Dagdas

2007-01-01T23:59:59.000Z

30

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

31

Performance investigation of two geothermal district heating systems for building applications: Energy analysis  

Science Journals Connector (OSTI)

The energetic performance of Balcova geothermal district heating system (BGDHS) and Salihli geothermal district heating system (SGDHS) installed in Turkey is investigated for building applications in this study. The essential components (e.g., pumps, heat exchangers) of these geothermal district heating systems are also included in the modeling. The present model is employed for system analysis and energetic performance evaluation of the geothermal district heating systems. Energy flow diagrams are drawn to exhibit the input and output energies and losses to the surroundings by using the 2003 and 2004 heating season actual data. In addition, energy efficiencies are studied for comparison purposes, and are found to be 39.36% for BGDHS and 59.31% for SGDHS, respectively.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer

2006-01-01T23:59:59.000Z

32

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

33

Energy Efficient Integration of Heat Pumps into Solar District Heating Systems with Seasonal Thermal Energy Storage  

Science Journals Connector (OSTI)

Abstract Solar district heating (SDH) with seasonal thermal energy storage (STES) is a technology to provide heat for space heating and domestic hot water preparation with a high fraction of renewable energy. In order to improve the efficiency of such systems heat pumps can be integrated. By preliminary studies it was discovered, that the integration of a heat pump does not always lead to improvements from an overall energy perspective, although the operation of the heat pump increases the efficiency of other components of the system e. g. the STES or the solar collectors. Thus the integration of heat pumps in SDH systems was investigated in detail. Usually, the heat pumps are integrated in such a way, that the STES is used as low temperature heat source. No other heat sources from the ambience are used and only that amount of energy consumed by the heat pump is additionally fed into the system. In the case of an electric driven heat pump, this is highly questionable concerning economic and CO2-emission aspects. Despite that fact the operation of the heat pump influences positively the performance of other components in the system e. g. the STES and makes them more efficient. If the primary energy consumption of the heat pump is lower than the energetic benefits of all other components, the integration makes sense from an energetic point of view. A detailed assessment has been carried out to evaluate the most promising system configurations for the integration of a heat pump. Based on this approach a system concept was developed in which the integration of the heat pump is energetically further improved compared to realised systems. By means of transient system simulations this concept was optimised with regard to the primary energy consumption. A parameter study of this new concept has been performed to identify the most sensitive parameters of the system. The main result and conclusion are that higher solar fractions and also higher primary energy savings can be achieved by SDH systems using heat pumps compared systems without heat pumps.

Roman Marx; Dan Bauer; Harald Drueck

2014-01-01T23:59:59.000Z

34

Exergy analysis of two geothermal district heating systems for building applications  

Science Journals Connector (OSTI)

This study evaluates the exergetic performance of two local Turkish geothermal district heating systems through exergy analysis. The exergy destructions in these geothermal district heating systems are quantified and illustrated using exergy flow diagrams for a reference temperature of 1 °C using the 2003 and 2004 actual seasonal heating data. The results indicate that the exergy destructions in these systems particularly occur due to losses in pump, heat exchangers, pipelines, and the reinjection of thermal water. Exergy efficiencies of the two systems are investigated for the system performance analysis and improvement and are determined to be 42.89% and 59.58%, respectively.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer

2007-01-01T23:59:59.000Z

35

A Geothermal District-Heating System and Alternative Energy Research Park  

Open Energy Info (EERE)

Geothermal District-Heating System and Alternative Energy Research Park Geothermal 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 Geothermal District-Heating System and Alternative Energy Research Park on the NM Tech Campus Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Geothermal Energy Production from Low Temperature Resources, Coproduced Fluids from Oil and Gas Wells, and Geopressured Resources Project Type / Topic 3 Low Temperature Resources Project Description With prior support from the Department of Energy (GRED III Program), New Mexico Institute of Mining and Technology (NM Tech) has established that this resource likely has sufficient permeability (3000 Darcies) and temperatures (80-112 oC) to develop a campus-wide district heating system.

36

Retro-Commissioning and Improvement for District Heating and Cooling System Using Simulation  

E-Print Network (OSTI)

In order to improve the energy performance of a district heating and cooling (DHC) system, retro-commissioning was analyzed using visualization method and simulation based on mathematical models, and improved operation schemes were proposed...

Shingu, H.; Nakajima, R.; Yoshida, H.; Wang, F.

2006-01-01T23:59:59.000Z

37

4th Generation District Heating (4GDH): Integrating smart thermal grids into future sustainable energy systems  

Science Journals Connector (OSTI)

Abstract This paper defines the concept of 4th Generation District Heating (4GDH) including the relations to District Cooling and the concepts of smart energy and smart thermal grids. The motive is to identify the future challenges of reaching a future renewable non-fossil heat supply as part of the implementation of overall sustainable energy systems. The basic assumption is that district heating and cooling has an important role to play in future sustainable energy systems – including 100 percent renewable energy systems – but the present generation of district heating and cooling technologies will have to be developed further into a new generation in order to play such a role. Unlike the first three generations, the development of 4GDH involves meeting the challenge of more energy efficient buildings as well as being an integrated part of the operation of smart energy systems, i.e. integrated smart electricity, gas and thermal grids.

Henrik Lund; Sven Werner; Robin Wiltshire; Svend Svendsen; Jan Eric Thorsen; Frede Hvelplund; Brian Vad Mathiesen

2014-01-01T23:59:59.000Z

38

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...

39

Piping network design of geothermal district heating systems: Case study for a university campus  

Science Journals Connector (OSTI)

Geothermal district heating system design consists of two parts: heating system and piping network design. District heating system design and a case study for a university campus is given in Yildirim et al. [1] in detail. In this study, piping network design optimisation is evaluated based on heat centre location depending upon the cost and common design parameters of piping networks which are pipe materials, target pressure loss (TPL) per unit length of pipes and installation type. Then a case study for the same campus is presented.

Nurdan Yildirim; Macit Toksoy; Gulden Gokcen

2010-01-01T23:59:59.000Z

40

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...

Note: This page contains sample records for the topic "district heating system" 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

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

SciTech Connect

The potential for district heating was examined in terms of a total (regional) system and two subsystems of overlapping scales. The basis of the economic analysis of district heating was that the utility's electric and gas customers would not be economically burdened by the implementation of district heating, and that any incremental costs due to district heating (e.g. district heating capital and operating costs, replacement electric power, abandonment of unamortized gas mains) would be charged to district heating customers.

Not Available

1984-01-01T23:59:59.000Z

42

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

E-Print Network (OSTI)

Simple models of district heating systems for load and demand side management and operational heating systems for load and demand side management and operational optimisation Simple modeller and demand side management and operational optimisation © 2004 by the authors, Department of Mechanical

43

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

E-Print Network (OSTI)

September 16, 2014 NIKKEN SEKKEI Research Institute Naoki Takahashi Study on Performance Verification and Evaluation of District Heating and Cooling System Using Thermal Energy of River Water ESL-IC-14-09-19 Proceedings of the 14th International... of the 14th International Conference for Enhanced Building Operations, Beijing, China, September 14-17, 2014 District heating and cooling system in Nakanoshima 4 Characteristics of heat supply plant in Nakanoshima district -River water is utilized as heat...

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

2014-01-01T23:59:59.000Z

44

Definition: District heat | Open Energy Information  

Open Energy Info (EERE)

District heat District heat Jump to: navigation, search Dictionary.png District heat A heating system that uses steam or hot water produced outside of a building (usually in a central plant) and piped into the building as an energy source for space heating, hot water or another end use.[1][2][3] View on Wikipedia Wikipedia Definition District heating (less commonly called teleheating) is a system for distributing heat generated in a centralized location for residential and commercial heating requirements such as space heating and water heating. The heat is often obtained from a cogeneration plant burning fossil fuels but increasingly biomass, although heat-only boiler stations, geothermal heating and central solar heating are also used, as well as nuclear power. District heating plants can provide higher efficiencies and better

45

Performance investigation of the Afyon geothermal district heating system for building applications: Exergy analysis  

Science Journals Connector (OSTI)

This paper deals with an energy and exergy evaluation and modeling of geothermal district heating systems for their system analysis, performance evaluation and optimization. As a comprehensive case study, the Afyon geothermal district heating system (AFJET) in Afyon, Turkey is considered and actual thermal data are collected and employed for analysis. Using actual system data, an evaluation of the district heating system performance, energy and exergy efficiencies, and exergy destructions in the system are conducted in this regard. This study is also conducted to show how energy and exergy efficiencies of the \\{GDHSs\\} will change with the reference temperature and how exergy losses will affect by the temperature difference between the geothermal resource and the supply temperature of the district heating distribution network. In addition, the negative effects of discharge waters of the AFJET are presented. The energy and exergy efficiencies of the entire AFJET are found to be 37.59% and 47.54%, respectively. The results are expected to be helpful to researchers and engineers in the area.

Ali Keçeba?; Muhammet Kayfeci; Engin Gedik

2011-01-01T23:59:59.000Z

46

Pagosa Springs District Heating District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

District Heating District Heating Low Temperature Geothermal District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Pagosa Springs District Heating District Heating Low Temperature Geothermal Facility Facility Pagosa Springs District Heating Sector Geothermal energy Type District Heating Location Pagosa Springs, Colorado Coordinates 37.26945°, -107.0097617° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

47

City of Klamath Falls District Heating District Heating Low Temperature  

Open Energy Info (EERE)

District Heating District Heating Low Temperature District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name City of Klamath Falls District Heating District Heating Low Temperature Geothermal Facility Facility City of Klamath Falls District Heating Sector Geothermal energy Type District Heating Location Klamath Falls, Oregon Coordinates 42.224867°, -121.7816704° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

48

Kethcum District Heating District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

Kethcum District Heating District Heating Low Temperature Geothermal Kethcum District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Kethcum District Heating District Heating Low Temperature Geothermal Facility Facility Kethcum District Heating Sector Geothermal energy Type District Heating Location Ketchum, Idaho Coordinates 43.6807402°, -114.3636619° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

49

San Bernardino District Heating District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

Bernardino District Heating District Heating Low Temperature Geothermal Bernardino District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name San Bernardino District Heating District Heating Low Temperature Geothermal Facility Facility San Bernardino District Heating Sector Geothermal energy Type District Heating Location San Bernardino, California Coordinates 34.1083449°, -117.2897652° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

50

Boise City Geothermal District Heating District Heating Low Temperature  

Open Energy Info (EERE)

Boise City Geothermal District Heating District Heating Low Temperature Boise City Geothermal District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Boise City Geothermal District Heating District Heating Low Temperature Geothermal Facility Facility Boise City Geothermal District Heating Sector Geothermal energy Type District Heating Location Boise, Idaho Coordinates 43.6135002°, -116.2034505° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

51

Philip District Heating District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

Philip District Heating District Heating Low Temperature Geothermal Philip District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Philip District Heating District Heating Low Temperature Geothermal Facility Facility Philip District Heating Sector Geothermal energy Type District Heating Location Philip, South Dakota Coordinates 44.0394329°, -101.6651441° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

52

Midland District Heating District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

Midland District Heating District Heating Low Temperature Geothermal Midland District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Midland District Heating District Heating Low Temperature Geothermal Facility Facility Midland District Heating Sector Geothermal energy Type District Heating Location Midland, South Dakota Coordinates 44.0716539°, -101.1554178° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

53

Susanville District Heating District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

Susanville District Heating District Heating Low Temperature Geothermal Susanville District Heating District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Susanville District Heating District Heating Low Temperature Geothermal Facility Facility Susanville District Heating Sector Geothermal energy Type District Heating Location Susanville, California Coordinates 40.4162842°, -120.6530063° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

54

BSU GHP District Heating and Cooling System (PHASE I) Geothermal Project |  

Open Energy Info (EERE)

BSU GHP District Heating and Cooling System (PHASE I) Geothermal Project BSU GHP District Heating and Cooling System (PHASE I) Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title BSU GHP District Heating and Cooling System (PHASE I) Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 1: Technology Demonstration Projects Project Description The Project will result in the construction of the largest ground source geothermal-based closed loop GHP heating and cooling system in America. Phase I of the Project began with the design, competitive bidding, and contract award for the drilling and "looping" of 1,800 boreholes in sports fields and parking lots on the north side of campus. The components of the entire Project include: (1) 4,100 four hundred feet deep boreholes spread over about 25 acres of sport fields and parking lots (Phase I will involve 1,800 boreholes spread over about 8 acres); (2) Each Phase will require a district energy station (about 9,000 sq. feet) that will each contain (A) two 2,500 ton heat pump chillers (which can produce 150 degree (F) water for heating purposes and 42 degree (F) water for cooling purposes); and (B) a variety of water pumps, electrical and other control systems; (3) a closed loop piping system that continuously circulates about 20,000 gallons of water (no anti-freeze) per minute through the boreholes, energy stations, a (two pipe) hot water loop and a (two pipe) chilled water loop (no water is drawn from the aquifer at any point in the operation); and (4) hot/chilled water-to-air heat exchangers in each of the buildings.

55

Energy and exergy analysis of geothermal district heating systems: an application  

Science Journals Connector (OSTI)

In this study we present an energy and exergy assessment and modeling of geothermal district heating systems for their system analysis, performance evaluation and optimization. A comprehensive case study is conducted in Balcova geothermal district heating system (BGDHS) in Izmir, Turkey and actual thermal data are collected and employed for analysis. Using actual system data, an assessment of the district heating system performance, energy and exergy efficiencies, and exergy destructions in the system is conducted in this regard. The exergy destructions in the overall BGDHS are quantified and illustrated using exergy flow diagram. Furthermore, both energy and exergy flow diagrams are exhibited for comparison purposes. It is observed through analysis that the exergy destructions in the system particularly take place as the exergy of the fluid lost in the pumps, the heat exchanger losses, the exergy of the thermal water (geothermal fluid) reinjected and the natural direct discharge (hot water distribution losses) of the system, accounting for 1.64%, 8.57%, 14.84% and 28.96%, respectively, of the total exergy input to the BGDHS. For system performance analysis and improvement, both energy and exergy efficiencies of the overall BGDHS are investigated and are determined to be 41.9% and 46%, respectively.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer

2005-01-01T23:59:59.000Z

56

Artificial neural network modeling of geothermal district heating system thought exergy analysis  

Science Journals Connector (OSTI)

This paper deals with an artificial neural network (ANN) modeling to predict the exergy efficiency of geothermal district heating system under a broad range of operating conditions. As a case study, the Afyonkarahisar geothermal district heating system (AGDHS) in Turkey is considered. The average daily actual thermal data acquired from the AGDHS in the 2009–2010 heating season are collected and employed for exergy analysis. An ANN modeling is developed based on backpropagation learning algorithm for predicting the exergy efficiency of the system according to parameters of the system, namely the ambient temperature, flow rate and well head temperature. Then, the recorded and calculated data conducted in the AGDHS at different dates are used for training the network. The results showed that the network yields a maximum correlation coefficient with minimum coefficient of variance and root mean square values. The results confirmed that the ANN modeling can be applied successfully and can provide high accuracy and reliability for predicting the exergy performance of geothermal district heating systems.

Ali Keçeba?; ?smail Yabanova; Mehmet Yumurtac?

2012-01-01T23:59:59.000Z

57

Elko District Heat District Heating Low Temperature Geothermal Facility |  

Open Energy Info (EERE)

Heat District Heating Low Temperature Geothermal Facility Heat District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Elko District Heat District Heating Low Temperature Geothermal Facility Facility Elko District Heat Sector Geothermal energy Type District Heating Location Elko, Nevada Coordinates 40.8324211°, -115.7631232° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

58

Barriers and enablers to geothermal district heating system development in the United States  

Science Journals Connector (OSTI)

According to the US Energy Information Administration, space and hot water heating represented about 20% of total US energy demand in 2006. Given that most of this demand is met by burning natural gas, propane, and fuel oil, an enormous opportunity exists for directly utilizing indigenous geothermal energy as a cleaner, nearly emissions-free renewable alternative. Although the US is rich in geothermal energy resources, they have been frequently undervalued in America's portfolio of options as a means of offsetting fossil fuel emissions while providing a local, reliable energy source for communities. Currently, there are only 21 operating GDHS in the US with a capacity of about 100 MW thermal. Interviews with current US district heating operators were used to collect data on and analyze the development of these systems. This article presents the current structure of the US regulatory and market environment for GDHS along with a comparative study of district heating in Iceland where geothermal energy is extensively utilized. It goes on to review the barriers and enablers to utilizing geothermal district heating systems (GDHS) in the US for space and hot water heating and provides policy recommendations on how to advance this energy sector in the US.

Hildigunnur H. Thorsteinsson; Jefferson W. Tester

2010-01-01T23:59:59.000Z

59

Thermal monitoring and optimization of geothermal district heating systems using artificial neural network: A case study  

Science Journals Connector (OSTI)

This paper deals with determine the energy and exergy efficiencies and exergy destructions for thermal optimization of a geothermal district heating system by using artificial neural network (ANN) technique. As a comprehensive case study, the Afyonkarahisar geothermal district heating system (AGDHS) in Afyonkarahisar/Turkey is considered and its actual thermal data as of average weekly data are collected in heating seasons during the period 2006–2010 for ANN based monitoring and thermal optimization. The measured data and calculated values are used at the design of Levenberg-Marquardt (LM) based multi-layer perceptron (MLP) in Matlab program. The results of the study are described graphically. The results show that the developed model is found to quickly predict the thermal performance and exergy destructions of the AGDHS with good accuracy. In addition, two main factors play important roles in the thermal optimization: (i) ambient temperature and (ii) flow rates in energy distribution cycle of the AGDHS. Various cases are investigated to determine how to change the energy and exergy efficiencies of the AGDHS for the temperature and flow rate. Finally, a monitoring and performance evaluation of a geothermal district heating system and its components by ANN will reduce the losses and human involvement and make the system more effective and efficient.

Ali Keçeba?; ?smail Yabanova

2012-01-01T23:59:59.000Z

60

Coefficient of performance (COP) analysis of geothermal district heating systems (GDHSs): Salihli GDHS case study  

Science Journals Connector (OSTI)

The purpose of this survey is about to analyze the heating coefficient of performance (COP) of geothermal district heating systems. Actual system data are taken from the Salihli GDHS, Turkey. The collected data are quantified and illustrated in tables, particularly for a reference temperature for comparison purposes. In this study, firstly energy and COP analysis of the \\{GDHSs\\} is introduced and then Salihli GDHS coefficient of performance results is given as a case study. Moreover, this paper offers an interesting empirical study of certain geothermal systems.

Leyla Ozgener

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Economic analysis of exergy efficiency based control strategy for geothermal district heating system  

Science Journals Connector (OSTI)

Abstract In this study, the exergy efficiency based control strategy (ExEBCS) for exergy efficiency maximization in geothermal district heating systems (GDHSs) is economically evaluated. As a real case study, the Afyon GDHS in the city of Afyonkarahisar/Turkey is considered. Its actual thermal data as of average weekly data are collected in heating seasons during the period 2006–2010 for artificial neural network (ANN) modeling. The ANN modeling of the Afyon GDHS is used as a test system to demonstrate the effectiveness and economic impact of the ExEBCS under various operating conditions. Then, the ExEBCS is evaluated economically in case of application to real Afyon GDHS of the ExEBCS. The results show that the initial cost for the ExEBCS is more expensive than that for the old one by 6.33 kUS$/year as a result of replacing automatic controller. The saving in heat production makes the ExEBCS profitable by up to 7% of annual energy saving as a result of the increase in the heat production by 88% when the control system is operated. This results in a short payback period of 3.8 years. This study confirms that the use of ExEBCS in district heating systems (especially GDHS) is quite suitable.

Ali Keçeba?; ?smail Yabanova

2013-01-01T23:59:59.000Z

62

Marketing the Klamath Falls Geothermal District Heating system  

SciTech Connect

The new marketing strategy for the Klamath Falls system has concentrated on offering the customer an attractive and easy to understand rate structure, reduced retrofit cost and complexity for his building along with an attractive package of financing and tax credits. Initial retrofit costs and life-cycle cost analysis have been conducted on 22 buildings to date. For some, the retrofit costs are simply too high for the conversion to make sense at current geothermal rates. For many, however, the prospects are good. At this writing, two new customers are now connected and operating with 5 to 8 more buildings committed to connect this construction season after line extensions are completed. This represents nearly a 60% increase in the number of buildings connected to the system and a 40% increase in system revenue.

Rafferty, K.

1993-06-01T23:59:59.000Z

63

Biomass District Heat System for Interior Rural Alaska Villages  

SciTech Connect

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

64

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

65

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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...

66

Economic assessment of geothermal district heating systems: A case study of Balcova–Narlidere, Turkey  

Science Journals Connector (OSTI)

Geothermal energy is an important renewable energy resource in Turkey. The aim of this research is to evaluate the Balcova–Narlidere geothermal district heating system from an economic perspective. The system is the largest one in Turkey in terms of heating capacity and located in Izmir. Although there are some assessments regarding energy and exergy analysis for the Balcova–Narlidere geothermal district heating system, an economic assessment was not performed, previously. The profitability of the investment is investigated by using internal rate of return method. Seven hundred and eighty different scenarios are developed in this assessment. In order to estimate the potential cash flows in the remaining project life, operating cost in 2002 is decreased and increased, alternatively, between 5% and 30% by 5% in each step, while monthly energy utilization price is changed between US$ 17 and 72 in those scenarios. The energy utilization prices are suggested according to zero IRR value for all scenarios due to the consideration of social and environmental concerns in this investment. It is found that, the proper monthly energy utilization price for a 100 m2 household would be US$ 55.5 when the operating cost and heating capacity in 2002 were remained constant.

Berkan Erdogmus; Macit Toksoy; Baris Ozerdem; Niyazi Aksoy

2006-01-01T23:59:59.000Z

67

Energetic, exergetic, economic and environmental evaluations of geothermal district heating systems: An application  

Science Journals Connector (OSTI)

This study deals with an energetic and exergetic analysis as well as economic and environmental evaluations of Afyon geothermal district heating system (AGDHS) in Afyon, Turkey. In the analysis, actual system data are used to assess the district heating system performance, energy and exergy efficiencies, specific exergy index, exergetic improvement potential and exergy losses. And, for economic and environmental evaluations, actual data are obtained from the Technical Departments. The energy and exergy flow diagrams are clearly drawn to illustrate how much destructions/losses take place in addition to the inputs and outputs. For system performance analysis and improvement, both energy and exergy efficiencies of the overall AGDHS are determined to be 34.86% and 48.78%, respectively. The efficiency improvements in heat and power systems can help achieving energy security in an environmentally acceptable way by reducing the emissions that might otherwise occur. Present application has shown that in Turkey, geothermal energy is much cheaper than the other energy sources, like fossil fuels, and makes a significant contribution towards reducing the emissions of air pollution.

Ali Keçeba?

2013-01-01T23:59:59.000Z

68

Compare All CBECS Activities: District Heat Use  

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

District Heat Use District Heat Use Compare Activities by ... District Heat Use Total District Heat Consumption by Building Type Commercial buildings in the U.S. used a total of approximately 433 trillion Btu of district heat (district steam or district hot water) in 1999. There were only five building types with statistically significant district heat consumption; education buildings used the most total district heat. Figure showing total district heat consumption by building type. If you need assistance viewing this page, please call 202-586-8800. District Heat Consumption per Building by Building Type Health care buildings used the most district heat per building. Figure showing district heat consumption per building by building type. If you need assistance viewing this page, please call 202-586-8800.

69

Energetic and economic evaluations of geothermal district heating systems by using ANN  

Science Journals Connector (OSTI)

This paper proposes an artificial neural network (ANN) technique as a new approach to evaluate the energy input, losses, output, efficiency, and economic optimization of a geothermal district heating system (GDHS). By using ANN, an energetic analysis is evaluated on the Afyon geothermal district heating system (AGDHS) located in the city of Afyonkarahisar, Turkey. Promising results are obtained about the economic evaluation of that system. This has been used to determine if the existing system is operating at its optimal level, and will provide information about the optimal design and profitable operation of the system. The results of the study show that the ANN model used for the prediction of the energy performance of the AGDHS has good statistical performance values: a correlation coefficient of 0.9983 with minimum RMS and MAPE values. The total cost for the AGDHS is profitable when the PWF is higher than 7.9. However, the PWF of the AGDHS was found to be 1.43 for the given values. As a result, while installing a GDHS, one should take into account the influences of the PWF, ambient temperature and flow rate on the total costs of the system in any location where it is to be established.

Ali Keçeba?; Mehmet Ali Alkan; ?smail Yabanova; Mehmet Yumurtac?

2013-01-01T23:59:59.000Z

70

Warren Estates-Manzanita Estates Reno, Nevada residential geothermal district heating system  

SciTech Connect

Warren Estates-Manzanita Estates is the largest privately-owned and operated residential geothermal district heating system in the State of Nevada. The system has operated for ten years and presently services 95 homes. Geothermal energy is used to heat homes, domestic water, spas, swimming pools, and greenhouses. Four homes have installed driveway deicing systems using geothermal energy. This paper briefly describes the geothermal resource, wells, system engineering, operation, applications, and economics. The accompanying posters illustrate the geothermal area, system design, and various applications. The resource is part of the Moana geothermal field, located in southwest Reno. Excluding the Warren-Manzanita Estates, the well-known Moana field supports nearly 300 geothermal wells that supply fluids to individual residences, several motels, a garden nursery, a few churches, and a municipal swimming pool. The Warren-Manzanita Estates is ideally suited for residential district space heating because the resource is shallow, moderate-temperature, and chemically benign. The primary reservoir rock is the Kate Peak andesite, a Tertiary volcanic lahar that has excellent permeability within the narrow fault zones that bisect the property. The Kate Peak formation is overlain by impermeable Tertiary lake sediments and alluvium. Two production wells, each about 240 m deep, are completed near the center of the residential development at the intersection of two fault zones. Geothermal fluids are pumped at a rate of 15 to 25 l/s (260-400 gpm) from one of two wells at a temperature of 95{degrees}C (202{degrees}F) to two flat-plate heat exchangers. The heat exchangers transfer energy from the geothermal fluids to a second fluid, much like a binary geothermal power plant.

McKay, F.; McKay, G.; McKay, S.; Flynn, T. [McKay Pump and Drilling, Reno, NV (United States)

1995-12-31T23:59:59.000Z

71

Investigation of some renewable energy and exergy parameters for two Geothermal District Heating Systems  

Science Journals Connector (OSTI)

In this study, three new exergy parameters, namely total exergy destruction ratio, component exergy destruction ratio and dimensionless exergy destruction are introduced in addition to energetic renewability ratio, exergetic renewability ratio, energetic reinjection ratio and exergetic reinjection ratio, and compared for Edremit and Bigadic Geothermal District Heating Systems (GDHSs) based on their actual data. The respective daily graphs of these parameters are presented. Also, regression analyses using the actual data are performed to obtain some correlations for practical use. In brief, these parameters help us to identify the degree of renewability and other aspects and provide some insights.

C. Coskun; Z. Oktay; I. Dincer

2011-01-01T23:59:59.000Z

72

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...

73

Exergoeconomic analysis of a district heating system for geothermal energy using specific exergy cost method  

Science Journals Connector (OSTI)

Abstract This study presents the exergoeconomic analysis and evaluation in order to provide cost based information and suggests possible locations/components in a GDHS (geothermal district heating system) for improving the cost effectiveness. The analysis is based on the SPECO (specific exergy costing) method, and used to calculate exergy-related parameters and display cost flows for all streams and components. As a real case study, the Afyon GDHS in Turkey is considered based on actual operational data. The obtained results show that the unit exergy cost of heat produced by the Afyon GDHS is calculated as average 5624 $/h. The HEX (heat exchanger)-III among all components should be improved quickly due to the high total operating cost rate and relative cost difference. The HEX-I and PM (pump)-V have the highest exergoeconomic factors among all other system components due to the high owning and operating costs of these components. The heat production costs per exergy unit for all the \\{HEXs\\} decrease due to the high exergy destruction cost rate of the system, while the well head temperature and ambient temperature increase. The SPECO method may be used to improve the cost effectiveness according to exergy rates in \\{GDHSs\\} as a thermal system.

Mehmet Ali Alkan; Ali Keçeba?; Nurettin Yamankaradeniz

2013-01-01T23:59:59.000Z

74

District heating campaign in Sweden  

SciTech Connect

During the fall of 1994 a district heating campaign was conducted in Sweden. The campaign was initiated because the Swedish district heating companies agreed that it was time to increase knowledge and awareness of district heating among the general public, especially among potential customers. The campaign involved many district heating companies and was organized as a special project. Advertising companies, media advisers, consultants and investigators were also engaged. The campaign was conducted in two stages, a national campaign followed by local campaign was conducted in two stages, a national campaign followed by local campaigns. The national campaign was conducted during two weeks of November 1994 and comprised advertising on commercial TV and in the press.

Stalebrant, R.E. [Swedish District Heating Association, Stockholm (Sweden)

1995-09-01T23:59:59.000Z

75

Comparing advanced exergetic assessments of two geothermal district heating systems for residential buildings  

Science Journals Connector (OSTI)

Abstract Advanced exergy analysis method has been increasingly utilized in analyzing and assessing the performance of energy-related systems in recent years due to more deeply investigating the exergy destructions. In this study, two various geothermal district heating systems (GDHSs), the Afyon and Bigadiç GDHSs, which have been operated in Turkey, were considered to perform their advanced exergy analyses and assessments. The \\{GDHSs\\} studied were also compared with each other for the first time in terms of advanced exergetic aspects. In the analyses and calculations of the GDHS, the actual operational data obtained from the measurements and technical staff were utilized. The overall conventional and advanced exergetic efficiency values for the Afyon GDHS are determined to be 27.53% and 34.72% while those for the Bigadiç GDHS are obtained to be 21.03% and 32.52%, respectively. Considering both the interactions among components and the potential for improving components, more effective and efficient improvement priorities were proposed.

Ali Keçeba?; Can Coskun; Zuhal Oktay; Arif Hepbasli

2014-01-01T23:59:59.000Z

76

Energetic and exergetic performance investigation of the Bigadic Geothermal District Heating System in Turkey  

Science Journals Connector (OSTI)

In this study a comprehensive performance analysis of the Bigadic Geothermal District Heating System (GDHS) in Balikesir, Turkey is performed through thermodynamic assessment in terms of energy and exergy efficiencies. The actual thermal data taken from the Technical Department of the GDHS are utilized in the analysis to determine the exergy destructions in each component of the system and the overall energy and exergy efficiencies of the system for two reference temperatures taken as 15.6 °C for November (e.g., case 1) and 11 °C for December (e.g., case 2). The energy and exergy flow diagrams are clearly drawn to illustrate how much destructions/losses take place in addition to the inputs and outputs. The average energy and exergy efficiencies are found to be 30% and 36% for case 1, and 40% and 49% for case 2, respectively. The key reason as to why the exergy efficiencies are higher is because the heat recovery option is used through the reinjection processes which make use of waste heat. A parametric study is also conducted to show how energy and exergy flows change with the environment temperature. The results are expected to be helpful to researchers and engineers in the area.

Z. Oktay; C. Coskun; I. Dincer

2008-01-01T23:59:59.000Z

77

Exergoeconomic analysis of the Gonen geothermal district heating system for buildings  

Science Journals Connector (OSTI)

This paper presents an application of an exergoeconomic model, through exergy and cost accounting analyses, to the Gonen geothermal district heating system (GDHS) in Balikesir, Turkey for the entire system and its components. This exergoeconomic model is used to reveal the cost formation process and the productive interaction between components. The exergy destructions in the overall Gonen GDHS are quantified and illustrated for a reference temperature of 4 °C. The results indicate that the exergy destructions in the system occur primarily as a result of losses in the cooled geothermal water injected back into the reservoir, pumps, heat exchangers, and pipelines. Total exergy destruction and reinjection exergy of the cooled geothermal water result in 1010 kW (accounting for 32.49%), 320.3 kW (accounting for 10%) of the total exergy input to the Gonen GDHS, respectively. Both energy and exergy efficiencies of the overall Gonen GDHS are also investigated to analyze the system performance, as these efficiencies are determined to be 42% and 50%, respectively. It is found that an increase of the load condition leads to a decrease in the overall thermal costs, which will result in more cost-effective energy systems for buildings.

Z. Oktay; I. Dincer

2009-01-01T23:59:59.000Z

78

Effect of reference state on the exergoeconomic evaluation of geothermal district heating systems  

Science Journals Connector (OSTI)

Abstract The exergy cost structure of the geothermal district heating system (GDHS) is investigated by using an exergoeconomic method called as the modified productive structure analysis (MOPSA). A parametric study is also conducted to show how exergy cost flow rates change with the reference state (ambient temperature). As a comprehensive case study, the Afyon GDHS in Afyonkarahisar, Turkey is considered. The actual thermal data taken from the technical staffs as 2.3 °C for January (case 1) and 10.2 °C for February (case 2), 2010 in 100% load condition are collected for this study. Mechanical and thermal exergy flow rates, entropy production rates and exergy cost flow rates for each component in the Afyon GDHS are calculated using these two actual data sets. The results show that the exergy efficiencies of the overall system for these two cases are found to be 25.34% and 22.78%, respectively. And, the largest exergy cost loss occurs in the heat exchangers with 52.49% and 64.91% for cases 1 and 2, respectively. The unit exergy costs are found as cP>cT>cS>cQ for the actual data sets in each case. In addition, ambient temperature has a big impact on the exergies and costs of GDHSs.

Ali Keçeba?

2013-01-01T23:59:59.000Z

79

Effects of different operating conditions of Gonen geothermal district heating system on its annual performance  

Science Journals Connector (OSTI)

Abstract In this paper, the effects of different operating conditions of the Gonen geothermal district heating system (GDHS) on its annual energy and exergy performance are investigated. The system parameters such as temperature, pressure and flow rate are monitored by using fixed and portable measuring instruments over a one-year period. Thus the main differences in the annual system operation are detected. The measurements show that the Gonen GDHS has six different operating cases depending on the outside temperature throughout the year. The energy and exergy analysis of the system is carried out for each case using the actual system parameters at the corresponding reference temperatures, which are 3.86, 7.1, 8.88, 11.83, 15.26 and 20.4 °C. The highest and lowest energy (57.32%, 35.64%) and exergy (55.76%, 41.42%) efficiencies of the overall system are calculated at the reference temperatures of 15.26 °C and 3.86 °C, respectively. Besides, taking the six case-based energy and exergy analyses into account, the annual average energy and exergy efficiencies are determined to be 45.24% and 47.33%, respectively.

Asiye Aslan; Bedri Yüksel; Tu?rul Akyol

2014-01-01T23:59:59.000Z

80

Thermodynamic and economic evaluations of a geothermal district heating system using advanced exergy-based methods  

Science Journals Connector (OSTI)

Abstract In this paper, a geothermal district heating system (GDHS) is comparatively evaluated in terms of thermodynamic and economic aspects using advanced exergy-based methods to identify the potential for improvement, the interactions among system components, and the direction and potential for energy savings. The actual operational data are taken from the Sarayköy GDHS, Turkey. In the advanced exergetic and exergoeconomic analyses, the exergy destruction and the total operating cost within each component of the system are split into endogenous/exogenous and unavoidable/avoidable parts. The advantages of these analyses over conventional ones are demonstrated. The results indicate that the advanced exergy-based method is a more meaningful and effective tool than the conventional one for system performance evaluation. The exergetic efficiency and the exergoeconomic factor of the overall system for the Sarayköy GDHS were determined to be 43.72% and 5.25% according to the conventional tools and 45.06% and 12.98% according to the advanced tools. The improvement potential and the total cost-savings potential of the overall system were also determined to be 2.98% and 14.05%, respectively. All of the pumps have the highest improvement potential and total cost-savings potential because the pumps were selected to have high power during installation at the Sarayköy GDHS.

Mehmet Tan; Ali Keçeba?

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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

Performance and thermo-economic assessments of geothermal district heating system: A case study in Afyon, Turkey  

Science Journals Connector (OSTI)

In this study energy, exergy and exergoeconomic analysis of the Afyon geothermal district heating system (AGDHS) in Afyon, Turkey is performed through thermodynamic performances and thermo-economic assessments. In the analysis, actual system data are used to assess the district heating system performance, energy and exergy efficiencies, exergy losses and loss cost rates. Energy and exergy losses throughout the AGDHS are quantified and illustrated in the flow diagram. The energy and exergy efficiencies of the overall system are found to be 37.59% and 47.54%, respectively. The largest exergy loss occurs in the heat exchangers with 14.59% and then in the reinjection wells with 14.09%. Besides, thermo-economic evaluations of the AGDHS are given in table. Energy and exergy loss rates for the AGDHS are estimated to be 5.36 kW/$ and 0.2  kW/$, respectively.

Ali Keçeba?

2011-01-01T23:59:59.000Z

82

Elko County School District District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

County School District District Heating Low Temperature Geothermal County School District District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Elko County School District District Heating Low Temperature Geothermal Facility Facility Elko County School District Sector Geothermal energy Type District Heating Location Elko, Nevada Coordinates 40.8324211°, -115.7631232° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

83

Warm Springs Water District District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

Water District District Heating Low Temperature Geothermal Water District District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Warm Springs Water District District Heating Low Temperature Geothermal Facility Facility Warm Springs Water District Sector Geothermal energy Type District Heating Location Boise, Idaho Coordinates 43.6135002°, -116.2034505° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

84

Testing residential energy pricing in the Krakow, Poland, municipal district heat system  

SciTech Connect

While understanding of the operation of the price and rebate mechanism may be imperfect in the United States, in Poland most of the necessary infrastructure simply does not exist. Of all the former Soviet-bloc countries, Poland has moved the quickest to a market economy; however, the stresses have been and continue to be significant, particularly on the pensioned. The energy sector of the economy is still centrally planned while the legal framework for a transition to a regulated market is created. Some utilities have made more rapid progress than others in the transition. This paper describes the first year of an experiment involving design, implementation, and analysis of a pilot pricing, conservation, and heating system control experiment in 264 apartments in four buildings. The results--and experience in the United States--will be used to guide the pricing decisions of the municipal district heat utility and the conservation and air quality strategies of the Krakow development authority. Development of a price incentive strategy involved considerations of public policy toward fixed-income occupants and ownership of energy metering. Thermostats were installed to permit occupant control, and building-level conservation and control techniques were implemented. Physical constraints required the use of German ``cost allocator`` metering technology at the apartment level. Final subsidy or ``pseudo-pricing`` design included-building-level incentives as well as apartment performance inducements. Results include insights on communication and cultural impacts and guidance for future testing as well as energy conservation effectiveness values.

Wisnewski, R.; Reeves, G. [George Reeves Associates, Inc., Lake Hopatcong, NJ (United States); Markiewicz, J. [Fundacja na Rzecz Efektywnego Wykorzystania Energii w Krakowie, Krakow (Poland)

1995-08-01T23:59:59.000Z

85

An economic comparison and evaluation of two geothermal district heating systems for advanced exergoeconomic analysis  

Science Journals Connector (OSTI)

Abstract This paper refers to an economic comparison and evaluation of two geothermal district heating systems (GDHSs) under same reference state condition and mechanic/economic parameters by using an advanced exergoeconomic analysis. In this analysis, costs of investment and exergy destruction of each component for the thermal systems such as the Afyon and Sarayköy \\{GDHSs\\} were split into endogenous/exogenous and unavoidable/avoidable parts, and were also compared with each other for the first time. The results obtained show that the advanced exergoeconomic analysis makes the information more accurate and useful, and supplies additional information that cannot be provided by the conversional analysis. Furthermore, the Afyon GDHS can be made more cost effectiveness, removing the system components’ irreversibilities, technical-economic limitations, and poorly chosen manufacturing methods, according to the Sarayköy GDHS. The majority of the components in the Sarayköy GDHS are to operate more economically than those in the Afyon GDHS. As a result, the usefulness of this method was clearly demonstrated comparing both the systems.

P?nar Keçeba?; Harun Gökgedik; Mehmet Ali Alkan; Ali Keçeba?

2014-01-01T23:59:59.000Z

86

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

Energy.gov (U.S. Department of Energy (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.

87

District Wide Geothermal Heating Conversion Blaine County School...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Conversion Blaine County School District This project will impact the geothermal energy development market by showing that ground source heat pump systems using production...

88

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

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

89

November 20, 2012 Webinar: District Heating with Renewable Energy |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

November 20, 2012 Webinar: District Heating with Renewable Energy November 20, 2012 Webinar: District Heating with Renewable Energy November 20, 2012 Webinar: District Heating with Renewable Energy This webinar was held November 20, 2012, and provided information on Indiana's Ball State University geothermal heat pump system, and a hot-water district heating system in St. Paul, Minnesota. Download the presentations below, watch the webinar (WMV 194 MB), or view the text version. Find more CommRE webinars. Paradigm Shift-Coal to Geothermal Ball State University in Indianapolis, Indiana, is converting its campus district heating and cooling system from a coal-fired steam boiler to a ground source geothermal system that produces simultaneously hot water for heating and chilled water for cooling. It will be the largest ground source

90

District Heating with Renewable Energy Webinar  

Energy.gov (U.S. Department of Energy (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...

91

Co-sponsored second quarter progress review conference on district heating  

SciTech Connect

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

92

Determination of optimum pipe diameter along with energetic and exergetic evaluation of geothermal district heating systems: Modeling and application  

Science Journals Connector (OSTI)

This study deals with determination of optimum pipe diameters based on economic analysis and the performance analysis of geothermal district heating systems along with pipelines using energy and exergy analysis methods. In this regard, the Dikili geothermal district heating system (DGDHS) in Izmir, Turkey is taken as an application place, to which the methods presented here are applied with some assumptions. The system mainly consists of three cycles, namely (i) the transportation network, (ii) the Danistay region, and (iii) the Bariskent region. The thermal capacities of these regions are 21,025 and 7975 kW, respectively, while the supply (flow) and return temperature values of those are 80 and 50 °C, respectively. Based upon the assessment of the transportation network using the optimum diameter analysis method, minimum cost is calculated to be US$ 561856.906 year?1 for a nominal diameter of DN 300. The exergy destructions in the overall DGDHS are quantified and illustrated using exergy flow diagram. Furthermore, both energy and exergy flow diagrams are exhibited for comparison purposes. It is observed through analysis that the exergy destructions in the system particularly take place due to the exergy of the thermal water (geothermal fluid) reinjected, the heat exchanger losses, and all pumps losses, accounting for 38.77%, 10.34%, 0.76% of the total exergy input to the DGDHS. Exergy losses are also found to be 201.12817 kW and 1.94% of the total exergy input to the DGDHS for the distribution network. For the system performance analysis and improvement, both energy and exergy efficiencies of the overall DGDHS are investigated, while they are determined to be 40.21% and 50.12%, respectively.

Yildiz Kalinci; Arif Hepbasli; Ismail Tavman

2008-01-01T23:59:59.000Z

93

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...

94

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...

95

New Mexico State University District Heating Low Temperature...  

Open Energy Info (EERE)

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

96

Absorption cooling in district heating network: Temperature difference examination in hot water circuit.  

E-Print Network (OSTI)

?? Absorption cooling system driven by district heating network is relized as a smart strategy in Sweden. During summer time when the heating demand is… (more)

Yuwardi, Yuwardi

2013-01-01T23:59:59.000Z

97

Thermodynamic evaluation of the Afyon geothermal district heating system by using neural network and neuro-fuzzy  

Science Journals Connector (OSTI)

In this study, energy and exergy analysis of the Afyon geothermal district heating system (AGDHS) in Afyon, Turkey using artificial neural network (ANN) and adaptive neuro-fuzzy (ANFIS) methods is carried out. Actual system data in the analysis of the AGDHS are used. The results of ANN are compared with ANFIS in which the same data sets are used. ANN model is slightly better than ANFIS in determining the energy and exergy rates. In addition, new formulations obtained from ANN are presented for the determination of the energy and exergy rates of the AGDHS. The R2-values obtained when unknown data were used in the networks were 0.999999847 and 0.99999997 for the energy and exergy rates respectively, which are very satisfactory.

Arzu ?encan ?ahin; Hilmi Yaz?c?

2012-01-01T23:59:59.000Z

98

A comparative study on conventional and advanced exergetic analyses of geothermal district heating systems based on actual operational data  

Science Journals Connector (OSTI)

This paper comparatively evaluates exergy destructions of a geothermal district heating system (GDHS) using both conventional and advanced exergetic analysis methods to identify the potential for improvement and the interactions among the components. As a real case study, the Afyon GDHS in Afyonkarahisar, Turkey, is considered based on actual operational data. For the first time, advanced exergetic analysis is applied to the GDHSs, in which the exergy destruction rate within each component is split into unavoidable/avoidable and endogenous/exogenous parts. The results indicate that the interconnections among all the components are not very strong. Thus, one should focus on how to reduce the internal inefficiency (destruction) rates of the components. The highest priority for improvement in the advanced exergetic analysis is in the re-injection pump (PM-IX), while it is the heat exchanger (HEX-III) in the conventional analysis. In addition, there is a substantial influence on the overall system as the total avoidable exergy destruction rate of the heat exchanger (HEX-V) has the highest value. On the overall system basis, the value for the conventional exergetic efficiency is determined to be 29.29% while that for the modified exergetic efficiency is calculated to be 34.46% through improving the overall components.

Arif Hepbasli; Ali Keçeba?

2013-01-01T23:59:59.000Z

99

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.

100

Tushino - 3 district heating project/Moscow  

SciTech Connect

The contract for supply and installation of Honeywell control equipment at the district heating plant in Moscow suburb of Tushino was signed between the Mayor of Moscow and Honeywell in December 1991. Total contract value is US$3 million. The aim is to demonstrate on a pilot project the potential energy savings and improved pleat safety which can be achieved by means of electronic control of latest design. The Honeywell contract basically covers modernization of instrumentation and control of the gas fired heating plant, comprising water preparation and 4 boilers, of 100 Gcal/h each, i.e., 400 Gcal/h total. The plant is feeding the hot water network which has 60 heat exchanger stations connected. The heat exchangers (thermal rating between 2 to 10 Gcal/h each) supply hot water mainly to residential building blocks for apartment heating and domestic hot water. Honeywell`s responsibility covers engineering, supply of TDC 3000 micro-processor based control system for the boilers and DeltaNet Excel control for the Heat Exchangers. The contract also includes installation and start-up of the total control system.

Mayer, H.W.

1995-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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

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

102

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

SciTech Connect

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

103

"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

104

Achieving low return temperatures from district heating substations  

Science Journals Connector (OSTI)

Abstract District heating systems contribute with low primary energy supply in the energy system by providing heat from heat assets like combined heat and power, waste incineration, geothermal heat, wood waste, and industrial excess heat. These heat assets would otherwise be wasted or not used. Still, there are several reasons to use these assets as efficiently as possible, i.e., ability to compete, further reduced use of primary energy resources, and less environmental impact. Low supply and return temperatures in the distribution networks are important operational factors for obtaining an efficient district heating system. In order to achieve low return temperatures, customer substations and secondary heating systems must perform without temperature faults. In future fourth generation district heating systems, lower distribution temperatures will be required. To be able to have well-performing substations and customer secondary systems, continuous commissioning will be necessary to be able to detect temperature faults without any delays. It is also of great importance to be able to have quality control of eliminated faults. Automatic meter reading systems, recently introduced into district heating systems, have paved the way for developing new methods to be used in continuous commissioning of substations. This paper presents a novel method using the temperature difference signature for temperature difference fault detection and quality assurance of eliminated faults. Annual hourly datasets from 140 substations have been analysed for temperature difference faults. From these 140 substations, 14 were identified with temperature difference appearing or eliminated during the analysed year. Nine appeared during the year, indicating an annual temperature difference fault frequency of more than 6%.

Henrik Gadd; Sven Werner

2014-01-01T23:59:59.000Z

105

District cooling and heating development in Stamford, CT. Final report  

SciTech Connect

This report summarizes the development options for introducing district cooling and heating in downtown Stamford, Connecticut. A district energy system as defined for the Stamford project is the production of chilled and hot water at a central energy plant, and its distribution underground to participating building in the vicinity. The objective of the study was to investigate implementation of a district energy system in conjunction with cogeneration as a means to encourage energy conservation and provide the city with an economic development tool. Analysis of the system configuration focused on selecting an arrangement which offered a realistic opportunity for implementation. Three main alternatives were investigated: (1) construction of an 82 MW cogeneration plant and a district heating and cooling system to serve downtown buildings, (2) construction of a small (4 MW) in-fence cogeneration plant combined with cooling and heating, and (3) construction of a district cooling and heating plant to supply selected buildings. Option (1) was determined to be unfeasible at this time due to low electricity prices. The analysis demonstrated that alternatives (2) and (3) were feasible. A number of recommendations are made for detailed cost estimates and ownership, leasing, and financial issues. 12 figs., 10 tabs.

NONE

1994-12-01T23:59:59.000Z

106

A comparative study on substation types and network layouts in connection with low-energy district heating systems  

Science Journals Connector (OSTI)

The study deals with low-energy District Heating (DH) networks operating in low temperatures such as 55 °C in terms of supply and 25 °C in terms of return. The network layout, additional booster pumps, and different substation types such as storage tanks either equipped or not equipped in domestic hot water production site were examined. Effects of booster pumps on pipe dimensions in the latter case were investigated. Temperature drops during the summer months due to low heat demands of consumers were explored. Use of approaches such as looped networks and branched network layouts with bypasses for end-consumers were also studied, heat loss from these networks and the drop in temperature in the heat-carrier-supply medium being compared.

Hakan ?brahim Tol; Svend Svendsen

2012-01-01T23:59:59.000Z

107

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...

108

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

SciTech Connect

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

109

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

110

District Wide Geothermal Heating Conversion Blaine County School District  

Energy.gov (U.S. Department of Energy (DOE))

This project 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 ownership of available HVAC replacement options.

111

District heating and cooling feasibility study, Dunkirk, New York  

SciTech Connect

The objective of this project is to perform a preliminary investigation of the technical and economic feasibility of implementing a district heating and cooling (DHC) system in the City of Dunkirk, New York. The study was conducted by first defining a heating and cooling (HC) load service area. Then, questionnaires were sent to prospective DHC customers. After reviewing the owners responses, large consumers of energy were interviewed for more detail of their HC systems, including site visits, to determine possibilities of retrofitting their systems to district heating and cooling. Peak HC loads for the buildings were estimated by Burns and Roe's in-house computer programs. Based on the peak loads, certain customers were determined for suitability as anchor customers. Various options using cogeneration were investigated for possible HC sources. Equipment for HC sources and HC loads were sized and their associated costs estimated. Finally, economic analyses were performed. The conclusion is that it is technically and economically feasible to implement a district heating and cooling system in the City of Dunkirk. 14 figs., 15 tabs.

Not Available

1988-06-01T23:59:59.000Z

112

Fuzzy predictive control of district heating network  

Science Journals Connector (OSTI)

This paper presents a concept for controlling the supply temperature in district heating networks (DHNs) using model predictive control. Due to the inherent non-linearity in the response characteristics caused by varying flow rates the use of fuzzy dynamic matrix control (DMC) is proposed. The fuzzy partitions of the local finite impulse response (FIR) models are constructed by an axis-orthogonal, incremental partitioning scheme. Furthermore, a novel approach for determining future fuzzy trajectory based on heat load forecasts is implemented. It is demonstrated that the fuzzy DMC performs well for the case study considered. In addition, different set point strategies are applied and the results are evaluated with respect to operational costs. In this context it is shown that the trade-off between pumping and heat loss cost plays an important role in minimising overall costs.

S. Grosswindhager; M. Kozek; Andreas Voigt; Lukas Haffner

2013-01-01T23:59:59.000Z

113

Feasibility analysis of geothermal district heating for Lakeview, Oregon  

SciTech Connect

An analysis of the geothermal resource at Lakeview, Oregon, indicates that a substantial resource exists in the area capable of supporting extensive residential, commercial and industrial heat loads. Good resource productivity is expected with water temperatures of 200{degrees}F at depths of 600 to 3000 feet in the immediate vicinity of the town. Preliminary district heating system designs were developed for a Base Case serving 1170 homes, 119 commercial and municipal buildings, and a new alcohol fuel production facility; a second design was prepared for a downtown Mini-district case with 50 commercial users and the alcohol plant. Capital and operating costs were determined for both cases. Initial development of the Lakeview system has involved conducting user surveys, well tests, determinations of institutional requirements, system designs, and project feasibility analyses. A preferred approach for development will be to establish the downtown Mini-district and, as experience and acceptance are obtained, to expand the system to other areas of town. Projected energy costs for the Mini-district are $10.30 per million Btu while those for the larger Base Case design are $8.20 per million Btu. These costs are competitive with costs for existing sources of energy in the Lakeview area.

Not Available

1980-12-23T23:59:59.000Z

114

Geothermal district heating in Turkey: The Gonen case study  

Science Journals Connector (OSTI)

The status of geothermal district heating in Turkey and its future prospects are reviewed. A description is given of the Gonen project in Balikesir province, the first system to begin citywide operation in the country. The geology and geothermal resources of the area, the history of the project's development, the problems encountered, its economic aspects and environmental contributions are all discussed. The results of this and other such systems installed in Turkey have confirmed that, in this country, heating an entire city based on geothermal energy is a significantly cleaner, cheaper option than using fossil fuels or other renewable energy resources.

Zuhal Oktay; Asiye Aslan

2007-01-01T23:59:59.000Z

115

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

116

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

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

117

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

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

118

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

SciTech Connect

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

119

Oregon Institute of Technology District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

District Heating Low Temperature Geothermal District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Oregon Institute of Technology District Heating Low Temperature Geothermal Facility Facility Oregon Institute of Technology Sector Geothermal energy Type District Heating Location Klamath Falls, Oregon Coordinates 42.224867°, -121.7816704° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

120

New Mexico State University District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

State University District Heating Low Temperature Geothermal State University District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name New Mexico State University District Heating Low Temperature Geothermal Facility Facility New Mexico State University Sector Geothermal energy Type District Heating Location Las Cruces, New Mexico Coordinates 32.3123157°, -106.7783374° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

Note: This page contains sample records for the topic "district heating system" 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

Idaho Capitol Mall District Heating Low Temperature Geothermal Facility |  

Open Energy Info (EERE)

Capitol Mall District Heating Low Temperature Geothermal Facility Capitol Mall District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Idaho Capitol Mall District Heating Low Temperature Geothermal Facility Facility Idaho Capitol Mall Sector Geothermal energy Type District Heating Location Boise, Idaho Coordinates 43.6135002°, -116.2034505° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

122

Warren Estates District Heating Low Temperature Geothermal Facility | Open  

Open Energy Info (EERE)

Warren Estates District Heating Low Temperature Geothermal Facility Warren Estates District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Warren Estates District Heating Low Temperature Geothermal Facility Facility Warren Estates Sector Geothermal energy Type District Heating Location Reno, Nevada Coordinates 39.5296329°, -119.8138027° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

123

Fort Boise Veteran's Hospital District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

Boise Veteran's Hospital District Heating Low Temperature Geothermal Boise Veteran's Hospital District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Fort Boise Veteran's Hospital District Heating Low Temperature Geothermal Facility Facility Fort Boise Veteran's Hospital Sector Geothermal energy Type District Heating Location Boise, Idaho Coordinates 43.6135002°, -116.2034505° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

124

Manzanita Estates District Heating Low Temperature Geothermal Facility |  

Open Energy Info (EERE)

Manzanita Estates District Heating Low Temperature Geothermal Facility Manzanita Estates District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Manzanita Estates District Heating Low Temperature Geothermal Facility Facility Manzanita Estates Sector Geothermal energy Type District Heating Location Reno, Nevada Coordinates 39.5296329°, -119.8138027° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

125

Litchfield Correctional Center District Heating Low Temperature Geothermal  

Open Energy Info (EERE)

Correctional Center District Heating Low Temperature Geothermal Correctional Center District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Litchfield Correctional Center District Heating Low Temperature Geothermal Facility Facility Litchfield Correctional Center Sector Geothermal energy Type District Heating Location Susanville, California Coordinates 40.4162842°, -120.6530063° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

126

Gila Hot Springs District Heating Low Temperature Geothermal Facility |  

Open Energy Info (EERE)

Gila Hot Springs District Heating Low Temperature Geothermal Facility Gila Hot Springs District Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Gila Hot Springs District Heating Low Temperature Geothermal Facility Facility Gila Hot Springs Sector Geothermal energy Type District Heating Location Gila Hot Springs, New Mexico Coordinates Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

127

Energy Accounting for District Heating and Cooling Plants  

E-Print Network (OSTI)

ENERGY ACCOUNTING FOR DISTRICT HEATING AND COOLING PLANTS John A. Barrett, P.E. Manager, Central Plant Utilities University of Houston Houston, Texas Introduction Energy accounting combines engineering science with the insights of cost... Energy Technology Conference Houston, TX, April 22-25, 1979 The Science of Plant Utilities Control While the Weiss papers are not as specific to district heating and cooling plants as the preceding papers, they do treat other problem areas of interest...

Barrett, J. A.

1979-01-01T23:59:59.000Z

128

Economics of power plant district and process heating in Richland, Washington  

SciTech Connect

The economic feasibility of utilizing hot water from nuclear reactors to provide district heating for private residences in Richland, Washington, and space and process heating for nearby offices, part of the Hanford Reservation, and the Lamb-Weston potato processing plant is assessed. Specifically, the practicality of using hot water from the Washington Public Power Supply System's WNP-1 reactor, which is currently under construction on the Hanford Reservation, just north of the City of Richland is established. World-wide experience with district heating systems and the advantages of using these systems are described. The GEOCITY computer model used to calculate district heating costs is described and the assumptions upon which the costs are based are presented. District heating costs for the city of Richland, process heating costs for the Lamb-Weston potato processing plant, district heating costs for the Horn Rapids triangle area, and process heating costs for the 300 and 3000 areas are discussed. An economic analysis is discussed and institutional restraints are summarized. (MCW)

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

1981-04-01T23:59:59.000Z

129

District heating/feasibility study for Jamestown, New York. Phase two. Final report  

SciTech Connect

This report details an investigation to implement district heating in Jamestown, New York. It is a technical and economic feasibility study of a hot-water district-heating system, using a municipal electric plant as the heat source and the downtown area as a source for customers. As a result of the project, the City of Jamestown built a district-heating system that was a service to four customers in 1984 and expanded to 14 customers in 1985. The City expects it to grow in 1986 and beyond. Customers are realizing a 20 to 30% savings in heating costs. The municipal electric plant burns coal and the system so far has displaced the equivalent of 1 million gallons of oil per year.

Oliker, I.

1986-04-01T23:59:59.000Z

130

Community Renewable Energy Success Stories Webinar: District Heating with  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

District District Heating with Renewable Energy (text version) Community Renewable Energy Success Stories Webinar: District Heating with Renewable Energy (text version) Below is the text version of the webinar titled "District Heating with Renewable Energy," originally presented on November 20, 2012. Operator: The broadcast is now starting. All attendees are in listen-only mode. Sarah Busche: Hi, good afternoon everyone, and welcome to today's webinar sponsored by the U.S. Department of Energy. I'm Sarah Busche, and I'm here with Devin Egan. We're broadcasting live from the National Renewable Energy Lab in Golden, Colorado. And we're going to give everyone a few minutes to call in and log on, but while we do that, Devin's going to go over some of the logistics, and then we'll get started. Devin?

131

Geothermal district heating applications in Turkey: a case study of Izmir–Balcova  

Science Journals Connector (OSTI)

Turkey is located on the Mediterranean sector of the Alpine–Himalayan Tectonic Belt and is among the first seven countries in abundance of geothermal resources around the world. However, the share of its potential used is only about 2%. This means that considerable studies on geothermal energy could be conducted in order to increase the energy supply and to reduce atmospheric pollution in Turkey. The main objective in doing the present study is twofold, namely: (a) to overview the status and future aspects of geothermal district heating applications in Turkey and (b) to present the Izmir–Balcova geothermal district heating system, which is one example of the high temperature district heating applications in Turkey. The first geothermal heating application was applied in 1981 to the Izmir–Balcova thermal facilities, where the downhole heat exchanger was also used for the first time. Besides this, the first city based geothermal district heating system has been operated in Balikesir–Gonen since 1987. Recently, the total installed capacity has reached 820 \\{MWt\\} for direct use. An annual average growth of 23% of the residences connected to geothermal district heating systems has been achieved since 1983 in the country, representing a decrease of 5% in the last three years. Present applications have shown that in Turkey, geothermal energy is much cheaper than the other energy sources, like fossil fuels, and can make a significant contribution towards reducing the emission of greenhouse gases.

A Hepbasli; C Canakci

2003-01-01T23:59:59.000Z

132

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...

133

District Heating and Cooling feasibility study, Salt Lake City, Utah: Final report  

SciTech Connect

The following is a general description of the Burns and Roe study of District Heating and Cooling Feasibility for Salt Lake City, Utah. The study assesses District Heating and Cooling (DHC) and develops a conceptual district system for Salt Lake City. In assessing District Heating and Cooling in Salt Lake City, the system conceived is evaluated to determine whether it is technically and economically viable. To determine technical viability, aspects such as implementation, pipe routing, and environmental restrictions are reviewed to foresee any technical problems that would arise as a result of DHC. To determine economic feasibility, the conceived system is priced to determine the capital cost to construct, and modeled in an economic analysis using anticipated operating and fuel costs to produce the required revenue necessary to run the system. Technical and Economic feasibility are predicated on many variables, including heating and cooling load, pipe routing, system implementation, and fuel costs. These variables have been investigated and demonstrate a substantial potential for DHC in Salt Lake City. Areas of consideration include the Downtown Area, Metropolitan Hall of Justice and surrounding area, and the Hotel District.

Not Available

1988-09-09T23:59:59.000Z

134

District Heating and Cooling Feasiblity Study, Salt Lake City, Utah: Final report  

SciTech Connect

The following is a general description of the Burns and Roe study of District Heating and Cooling Feasibility for Salt Lake City, Utah. The study assesses District Heating and Cooling (DHC) and develops a conceptual district system for Salt Lake city. In assessing District Heating and Cooling in Salt Lake City, the system conceived is evaluated to determine whether it is technically and economically viable. To determine technical viability, aspects such as implementation, pipe routing, and environmental restrictions are reviewed to foresee any technical problems that would arise as a result of DHC. To determine economic feasibility, the conceived system is priced to determine the capital cost to construct, and modeled in an economic analysis using anticipated operating and fuel costs to produce the required revenue necessary to run the system. Technical and Economic feasibility are predicated on many variables, including heating and cooling load, pipe routing, system implementation, and fuel costs. These variables have been investigated and demonstrate a substantial potential for DHC in Salt Lake City. Areas of consideration include the Downtown Area, Metropolitan Hall of Justice and surrounding area, and the Hotel District.

Not Available

1988-09-09T23:59:59.000Z

135

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

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

136

Energy efficiency improvements utilising mass flow control and a ring topology in a district heating network  

Science Journals Connector (OSTI)

Abstract Heating and cooling have a major role in the energy sector, covering 46% of total final energy use worldwide. District heating (DH) is a significant technology for improving the energy efficiency of heating systems in communities, because it enables waste heat sources to be utilised economically and therefore significantly reduces the environmental impacts of power generation. As a result of new and more stringent construction regulations for buildings, the heat demands of individual buildings are decreasing and more energy-efficient heating systems have to be developed. In this study, the energy efficiency of a new DH system which includes both a new control system called mass flow control and a new network design called a ring network is examined. A topology in the Helsinki region is studied by using a commercial DH network modelling tool, Grades Heating. The district heating network is attached to a wood-burning heat station which has a heat recovery system in use. Examination is performed by means of both technical and economic analysis. The new non-linear temperature programme that is required is adopted for supply and return temperatures, which allows greater temperature cooling and smaller flow rates. Lower district heating water temperatures are essential when reducing the heat losses in the network and heat production. Mass flow control allows smaller pressure drops in the network and thus reduces the pumping power. The aim of this study was to determine the most energy-efficient DH water supply temperatures in the case network. If the ring network design is utilised, the district heating system is easier to control. As a result the total heat consumption within the heating season is reduced compared to traditional DH systems. On the basis of the results, the new DH system is significantly more energy-efficient in the case network that was examined than the traditional design. For example, average energy losses within the constraints (which consist of heat losses, pumping energy, and surplus energy from the heat recovery system) are reduced from 4.4% to 3.1%.

Tatu Laajalehto; Maunu Kuosa; Tapio Mäkilä; Markku Lampinen; Risto Lahdelma

2014-01-01T23:59:59.000Z

137

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.

138

Return temperature influence of a district heating network on the CHP plant production costs.  

E-Print Network (OSTI)

?? The aim of this Project is to study the influence of high return temperatures in district heating on the costs for heat and power… (more)

Sallent, Roger

2009-01-01T23:59:59.000Z

139

Substations for Decentralized Solar District Heating: Design, Performance and Energy Cost  

Science Journals Connector (OSTI)

Abstract The development of solar district heating is gaining more and more interest, but, in some case the space available for the integration of solar collectors on the ground is limited and the use of decentralized systems is necessary. For decentralized solar district heating systems different hydraulic schemes at the substation level, with or without local use of solar energy, are possible. The present paper detailed an advanced study on decentralized solar district heating system using dynamic simulation software. Nine different hydraulic schemes for substations have been investigated with a return to return feed in. For each scheme many parameters that influence the performance of the solar installation have been studied such as the district heating network return temperature, the solar collector area and the type of solar collector (low temperature or high temperature solar collector). The comparison between the different hydraulic schemes is based on thermal efficiency but also on solar energy cost using the methodology of the Levelized Cost Of Energy (LCOE).

Cedric Paulus; Philippe Papillon

2014-01-01T23:59:59.000Z

140

CHP, Waste Heat & District Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CHP Technologies and Applications CHP Technologies 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 useful thermal energy from a single energy stream." * CHP is not a single technology but a suite of technologies that can use a variety of fuels to generate electricity or power at the point of use. * CHP technology can be deployed quickly, cost-effectively, and with few geographic limitations. 11/1/2011 Slide 6 5/20/11 Slide 7 What is CHP? * On-site generation of Power and Thermal Energy from a single fuel source * 'Conventional' grid based generators are located remote from thermal applications while CHP plants are located close to thermal applications

Note: This page contains sample records for the topic "district heating system" 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

Heating System Specification Specification of Heating System  

E-Print Network (OSTI)

Appendix A Heating System Specification /* Specification of Heating System (loosely based */ requestHeat : Room ­? bool; 306 #12; APPENDIX A. HEATING SYSTEM SPECIFICATION 307 /* user inputs */ livingPattern : Room ­? behaviour; setTemp : Room ­? num; heatSwitchOn, heatSwitchOff, userReset : simple

Day, Nancy

142

Experimental evaluation of radiator control based on primary supply temperature for district heating substations  

Science Journals Connector (OSTI)

In this paper, we evaluate whether the primary supply temperature in district heating networks can be used to control radiator systems in buildings connected to district heating; with the purpose of increasing the ?T. The primary supply temperature in district heating systems can mostly be described as a function of outdoor temperature; similarly, the radiator supply temperature in houses, offices and industries can also be described as a function of outdoor temperature. To calibrate the radiator control system to produce an ideally optimal radiator supply temperature that produces a maximized ?T across the substation, the relationship between the primary supply temperature and outdoor temperature must be known. However, even if the relation is known there is always a deviation between the expected primary supply temperature and the actual temperature of the received distribution media. This deviation makes the radiator control system incapable of controlling the radiator supply temperature to a point that would generate a maximized ?T. Published simulation results show that it is possible and advantageous to utilize the primary supply temperature for radiator system control. In this paper, the simulation results are experimentally verified through implementation of the control method in a real district heating substation. The primary supply temperature is measured by the heat-meter and is shared with the radiator control system; thus no additional temperature sensors were needed to perform the experiments. However additional meters were installed for surveillance purposes. To maintain a stable indoor temperature at times when the primary supply and outdoor temperatures deviates from their assumed relation, the radiator system flow must be controlled by an additional control-loop. The results confirms that it is possible to control the radiator system based on the primary supply temperature while maintaining comfort; however, conclusions regarding improvements in ?T were hard to distinguish.

Jonas Gustafsson; Jerker Delsing; Jan van Deventer

2011-01-01T23:59:59.000Z

143

Finding of No Significant Impact for the I'SOT Canby District Heating Project, Modoc County, California Final Environmental Assessment  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Coiorado 80401-3393 Coiorado 80401-3393 March 7, 2003 DOEEA-1460 FINDING OF NO SIGNIFICANT IMPACT For the IN SEARCH OF TRUTH CANBY DISTRICT HEATING PROJECT CANBY, MODOC COUNTY, CALIFORNIA AGENCY: U.S. Department of Energy, Golden Field Office ACTION: Finding of No Significant Impact (FONSI) SUMMARY: The U.S. Department of Energy (DOE) conducted an Environmental ,4ssessment (EA) of the In Search of Truth (I'SOT) Canby District Heating Project, Modoc County, California, to evaluate potential environmental impacts of project construction and operations for three years. DOE would provide partial fundin g, through its National Renewable Energy Laboratory (NREL), to I'SOT for the development and field verification of a small-scale, geothermal district heating system. Local district heating projects have the potential for widespread

144

Alaska Gateway School District Adopts Combined Heat and Power  

Office of Energy Efficiency and Renewable Energy (EERE)

Tok School's use of a biomass combined heat and power system is helping the school to save on energy costs.

145

Potential of the Power-to-Heat Technology in District Heating Grids in Germany  

Science Journals Connector (OSTI)

Abstract The increasing amount of power generation from weather-dependent renewable sources in Germany is projected to lead to a considerable number of hours in which power generation exceeds power demand. One possibility to take advantage of this power surplus is through the Power-to-Heat technology. As combined heat and power (CHP)-plants can be upgraded relatively easily with a Power-to-Heat facility, a huge potential can be developed in German district heating grids which are mainly served by CHP-plants. In this paper the potential of the Power-to-Heat technology in district heating grids in Germany is evaluated for the years 2015 to 2030 under different assumptions.

Diana Böttger; Mario Götz; Nelly Lehr; Hendrik Kondziella; Thomas Bruckner

2014-01-01T23:59:59.000Z

146

District heating and cooling feasibility study for Dover, Delaware: Final report (September 2, 1986-May 31, 1988)  

SciTech Connect

The following is a general description of the Burns and Roe study for Dover, Delaware. The study assesses the feasibility of district heating in Dover, Delaware, and develops a conceptual district heating system. The system would use the McKee Run Station, and a new boiler plant as the heat source, and the area surrounding the plant and the legislative areas as the heat load. The study assesses the available heat load for the city, determines the available heat from the McKee Run Station, and develops a conceptual distribution network and system implementation plan. The study analyzes the environmental impacts, institutional issues, and project economics of the conceptual system. 24 figs., 26 tabs.

Not Available

1988-04-11T23:59:59.000Z

147

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

148

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

SciTech Connect

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

149

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

SciTech Connect

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

150

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 J¨aschke, 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

151

Power Generation Using District Heat: Energy Efficient Retrofitted Plus-energy School Rostock  

Science Journals Connector (OSTI)

Abstract The Mathias-Thesen-School in Rostock/Germany is one of few schools which has been retrofitted as an Energy Plus building as part of the energy-efficient school research project “EnEff:Schule” sponsored by the German Ministry of Economics and Technology. The original building complex (build 1960, useful area 2200sqm) is being converted into a compact building by extending the main building with two new buildings connected by light-flooded buffer spaces. Both the existing building and the new buildings will be highly insulated. The low remaining heating demand will be covered using an innovative concept, made reasonable by the low primary energy factor of the district heat in Rostock: A small-scale Organic Rankine Cycle system generates electricity using high-temperature district heat. The excess heat of the generator is then used to heat the building via low-temperature distribution systems. In combination with two small-scale onsite wind turbines and building integrated photovoltaics a positive primary energy balance is achieved. For this balance, the development of the primary energy factors (PEF) of the German electricity mix is crucial: With rising generation from renewable energies the PEF of electricity in Germany is going to descent, leading to higher primary energy factors of cogeneration systems. In the Mathias-Thesen-School in Rostock a detailed monitoring system was installed, which has been checked and reworked for proper functioning. First measures to optimize the HVAC system and user comfort have been taken. The second construction phase will take place in 2014, after which the performance of the ORC system and the Energy Balance will be analyzed in detail.

Simon Winiger; Sebastian Herkel; Gesa Haroske

2014-01-01T23:59:59.000Z

152

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)

,?C Gcoal,T/Day Ts1v,?C Tr1v,?C Tw2argv,?C Gcoalv,T/Day Figure 4. Verified Model Responses With Operational Data 2.4 Properties Analysis From The Verified Model Simulations Based on the verified model, the factors ]1,25.1,1.1[],,[ ?enhex fff.../s HV heating value, J/Kg kp proportional gain ki integral gain KF heat transfer coefficient, W/? q heat per unit area, W/m2 Q heat, W t time, s T temperature, ? TD temperature difference, ? u control signal 30 ?? ? factors Subscripts 1, 2...

Zhong, L.

2014-01-01T23:59:59.000Z

153

Operation and performance of a 350 kW (100 RT) single-effect/double-lift absorption chiller in a district heating network  

SciTech Connect

The efficiency of combined heat, power, and cold production in total energy systems could be improved significantly if absorption chillers were available that could be driven with limited mass flows of low-temperature hot water. In the case of district heat-driven air conditioning, for example, currently available standard absorption chillers are often not applied because they cannot provide the low hot water return temperature and the specific cooling capacity per unit hot water mass flow that are required by many district heating networks. Above all, a drastic increase in the size of the machine (total heat exchanger area) due to low driving temperature differences if of concern in low-temperature applications. A new type of multistage lithium bromide/water absorption chiller has been developed for the summertime operating conditions of district heating networks. It provides large cooling of the district heating water (some 30 K) and large cooling capacity per unit hot water mass flow. Two pilot plants of this novel absorption chiller were designed within the framework of a joint project sponsored by the German Federal Ministry of Education, Science, Research and Technology (BMBF), a consortium of 15 district heating utilities, and two manufacturers. The plants have been operated since summer 1996 in the district heating networks of Berlin and Duesseldorf. This paper describes the concept, installation, and control strategy of the two pilot plants, and it surveys the performance and operating experience of the plants under varying practical conditions.

Schweigler, C.J.; Preissner, M.; Demmel, S.; Hellmann, H.M.; Ziegler, F.F. [ZAE Bayern, Garching/Munich (Germany)

1998-10-01T23:59:59.000Z

154

Prospects for District Heating in the United States  

Science Journals Connector (OSTI)

...population, climate, and the insulation and floor space characteristics...systems received heat from thermal plants which employed large...5) were buried to the specifications of the cold water industry...adjusted to accommo-date the insulation cost and greater di-mensions...

J. Karkheck; J. Powell; E. Beardsworth

1977-03-11T23:59:59.000Z

155

Risk-sensitive optimal switching and applications to district energy systems  

E-Print Network (OSTI)

. Cost optimisation of energy system assets has typically been carried out under the assumption of riskRisk-sensitive optimal switching and applications to district energy systems Jhonny Gonzalez School consideration. In a flexible energy system with cogeneration and heat storage, however, it is possible

Glendinning, Paul

156

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

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

157

Geothermal Heat Pump System for the New 500-bed 200,000 SF Student...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Documents & Publications Oak Ridge City Center Technology Demonstration Project BSU GHP District Heating and Cooling System (Phase I) City of Eagan Civic Ice Arena Renovation...

158

Table 5a. Total District Heat Consumption per Effective Occupied Square  

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

a. Total District Heat Consumption per Effective a. Total District Heat Consumption per Effective Occupied Square Foot, 1992 Building Characteristics All Buildings Using District Heat (thousand) Total District Heat Consumption (trillion Btu) District Heat Intensities (thousand Btu) Per Square Foot Per Effective Occupied Square Foot All Buildings 94 429 84 93 Building Floorspace (Square Feet) 1,001 to 5,000 18 Q Q Q 5,001 to 10,000 11 Q Q Q 10,001 to 25,000 28 65 144 155 25,001 to 50,000 16 Q Q Q 50,001 to 100,000 9 50 79 81 100,001 to 200,000 6 59 76 79 200,001 to 500,000 5 109 71 77 Over 500,000 1 65 62 80 Principal Building Activity Education 22 50 71 78 Food Sales and Service Q Q Q Q Health Care 3 57 100 142 Lodging 9 66 112 116 Mercantile and Service 9 Q Q Q Office 24 110 63 70 Public Assembly 10 23 64 66 Public Order and Safety Q Q Q Q Religious Worship Q Q Q Q Warehouse and Storage

159

Table 5b. Relative Standard Errors for Total District Heat Consumption per  

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

b. Relative Standard Errors for Total District Heat Consumption per b. Relative Standard Errors for Total District Heat Consumption per Effective Occupied Square Foot, 1992 Building Characteristics All Buildings Using District Heat (thousand) Total District Heat Consumption (trillion Btu) District Heat Intensities (thousand Btu) Per Square Foot Per Effective Occupied Square Foot All Buildings 11 16 16 16 Building Floorspace (Square Feet) 1,001 to 5,000 27 78 76 76 5,001 to 10,000 38 60 51 51 10,001 to 25,000 18 43 36 35 25,001 to 50,000 24 68 51 51 50,001 to 100,000 18 40 30 30 100,001 to 200,000 27 33 35 36 200,001 to 500,000 22 31 26 27 Over 500,000 42 26 14 10 Principal Building Activity Education 17 29 22 23 Food Sales and Service 67 93 207 150 Health Care 35 26 25 14 Lodging 30 40 30 29 Mercantile and Service 40 74 59 58 Office 23 28 26 27 Public Assembly 25 33 25 26 Public Order and Safety

160

Heat transfer system  

DOE Patents (OSTI)

A heat transfer system for a nuclear reactor. Heat transfer is accomplished within a sealed vapor chamber which is substantially evacuated prior to use. A heat transfer medium, which is liquid at the design operating temperatures, transfers heat from tubes interposed in the reactor primary loop to spaced tubes connected to a steam line for power generation purposes. Heat transfer is accomplished by a two-phase liquid-vapor-liquid process as used in heat pipes. Condensible gases are removed from the vapor chamber through a vertical extension in open communication with the chamber interior.

McGuire, Joseph C. (Richland, WA)

1982-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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

Heating systems for heating subsurface formations  

DOE Patents (OSTI)

Methods and systems for heating a subsurface formation are described herein. A heating system for a subsurface formation includes a sealed conduit positioned in an opening in the formation and a heat source. The sealed conduit includes a heat transfer fluid. The heat source provides heat to a portion of the sealed conduit to change phase of the heat transfer fluid from a liquid to a vapor. The vapor in the sealed conduit rises in the sealed conduit, condenses to transfer heat to the formation and returns to the conduit portion as a liquid.

Nguyen, Scott Vinh (Houston, TX); Vinegar, Harold J. (Bellaire, TX)

2011-04-26T23:59:59.000Z

162

Energy Sources and Systems Analysis: 40 South Lincoln Redevelopment District (Full Report)  

SciTech Connect

This report presents the results of a case study to analyze district energy systems for their potential use in a project that involves redeveloping 270 units of existing public housing, along with other nearby sites. When complete, the redevelopment project will encompass more than 900 mixed-income residential units, commercial and retail properties, and open space. The analysis estimated the hourly heating, cooling, domestic hot water, and electric loads required by the community; investigated potential district system technologies to meet those needs; and researched available fuel sources to power such systems.

Not Available

2011-08-01T23:59:59.000Z

163

Geothermal Systems are a Breath of Fresh Air for Illinois School District |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Geothermal Systems are a Breath of Fresh Air for Illinois School Geothermal Systems are a Breath of Fresh Air for Illinois School District Geothermal Systems are a Breath of Fresh Air for Illinois School District May 24, 2010 - 11:01am Addthis Each classroom has a geothermal unit installed. Although large, the units blend into surroundings and don’t produce excess noise. | Photo Courtesy of Sterling Public Schools Each classroom has a geothermal unit installed. Although large, the units blend into surroundings and don't produce excess noise. | Photo Courtesy of Sterling Public Schools Lindsay Gsell Superintendent Tad Everett had two priorities when deciding on a new system to replace the aging oil-based boiler heating and cooling systems for the seven schools in his district: improving learning environments and saving

164

Geothermal Systems are a Breath of Fresh Air for Illinois School District |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Geothermal Systems are a Breath of Fresh Air for Illinois School Geothermal Systems are a Breath of Fresh Air for Illinois School District Geothermal Systems are a Breath of Fresh Air for Illinois School District May 24, 2010 - 11:01am Addthis Each classroom has a geothermal unit installed. Although large, the units blend into surroundings and don’t produce excess noise. | Photo Courtesy of Sterling Public Schools Each classroom has a geothermal unit installed. Although large, the units blend into surroundings and don't produce excess noise. | Photo Courtesy of Sterling Public Schools Lindsay Gsell Superintendent Tad Everett had two priorities when deciding on a new system to replace the aging oil-based boiler heating and cooling systems for the seven schools in his district: improving learning environments and saving

165

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

SciTech Connect

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

166

Solar heating system  

DOE Patents (OSTI)

An improved solar heating system in which the incident radiation of the sun is absorbed on collector panels, transferred to a storage unit and then distributed as heat for a building and the like. The improvement is obtained by utilizing a storage unit comprising separate compartments containing an array of materials having different melting points ranging from 75.degree. to 180.degree. F. The materials in the storage system are melted in accordance with the amount of heat absorbed from the sun and then transferred to the storage system. An efficient low volume storage system is provided by utilizing the latent heat of fusion of the materials as they change states in storing and releasing heat for distribution.

Schreyer, James M. (Oak Ridge, TN); Dorsey, George F. (Concord, TN)

1982-01-01T23:59:59.000Z

167

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

168

Heat pump system  

DOE Patents (OSTI)

An air heating and cooling system for a building includes an expansion type refrigeration circuit and a vapor power circuit. The refrigeration circuit includes two heat exchangers, one of which is communicated with a source of indoor air from the building and the other of which is communicated with a source of air from outside the building. The vapor power circuit includes two heat exchangers, one of which is disposed in series air flow relationship with the indoor refrigeration circuit heat exchanger and the other of which is disposed in series air flow relationship with the outdoor refrigeration circuit heat exchanger. Fans powered by electricity generated by a vapor power circuit alternator circulate indoor air through the two indoor heat exchangers and circulate outside air through the two outdoor heat exchangers. The system is assembled as a single roof top unit, with a vapor power generator and turbine and compressor thermally insulated from the heat exchangers, and with the indoor heat exchangers thermally insulated from the outdoor heat exchangers.

Swenson, Paul F. (Shaker Heights, OH); Moore, Paul B. (Fedhaven, FL)

1983-01-01T23:59:59.000Z

169

Heating and cooling system  

SciTech Connect

Heating and cooling of dwelling houses and other confined spaces is facilitated by a system in which thermal energy is transported between an air heating and cooling system in the dwelling and a water heat storage sink or source, preferably in the form of a swimming pool or swimming pool and spa combination. Special reversing valve circuitry and the use of solar collectors and liquid-to-liquid heat exchangers on the liquid side of the system , and special air valves and air modules on the air side of the system, enhance the system's efficiency and make it practical in the sense that systems employing the invention can utilize existing craft skills and building financing arrangements and building codes, and the like, without major modification.

Krumhansl, M.U.

1982-10-12T23:59:59.000Z

170

Irrigation Districts: Establishment of Electric Light and Power Systems:  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Irrigation Districts: Establishment of Electric Light and Power Irrigation Districts: Establishment of Electric Light and Power Systems: Powers (Nebraska) Irrigation Districts: Establishment of Electric Light and Power Systems: Powers (Nebraska) < Back Eligibility Agricultural Commercial Construction Fed. Government Fuel Distributor General Public/Consumer Industrial Installer/Contractor Institutional Investor-Owned Utility Local Government Low-Income Residential Multi-Family Residential Municipal/Public Utility Nonprofit Residential Retail Supplier Rural Electric Cooperative Schools State/Provincial Govt Systems Integrator Transportation Tribal Government Utility Savings Category Water Buying & Making Electricity Home Weatherization Program Info State Nebraska Program Type Siting and Permitting Provider Natural Resources Irrigation districts, created in section 46-1xx, are encouraged to

171

Heat rejection system  

DOE Patents (OSTI)

A cooling system for rejecting waste heat consists of a cooling tower incorporating a plurality of coolant tubes provided with cooling fins and each having a plurality of cooling channels therein, means for directing a heat exchange fluid from the power plant through less than the total number of cooling channels to cool the heat exchange fluid under normal ambient temperature conditions, means for directing water through the remaining cooling channels whenever the ambient temperature rises above the temperature at which dry cooling of the heat exchange fluid is sufficient and means for cooling the water.

Smith, Gregory C. (Richland, WA); Tokarz, Richard D. (Richland, WA); Parry, Jr., Harvey L. (Richland, WA); Braun, Daniel J. (Richland, WA)

1980-01-01T23:59:59.000Z

172

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

E-Print Network (OSTI)

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

Iversen, Julianne

2013-01-01T23:59:59.000Z

173

City of Vineland, New Jersey district heating/cooling feasibility study: Final report  

SciTech Connect

This study assesses the available heat load, determines the available heat from the heat sources, develops a distribution network, develops a system implementation plan, assesses the environmental impacts, addresses institutional issues, and analyzes the economics of the conceptual system.

Not Available

1986-11-01T23:59:59.000Z

174

Low Temperature Direct Use District Heating Geothermal Facilities | Open  

Open Energy Info (EERE)

Heating Geothermal Facilities Heating Geothermal Facilities Jump to: navigation, search Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":800,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026 further results","default":"","geoservice":"google","zoom":false,"width":"600px","height":"350px","centre":false,"layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","icon":"","visitedicon":"","forceshow":true,"showtitle":true,"hidenamespace":false,"template":"Geothermal

175

November 20, 2012 Webinar: District Heating with Renewable Energy...  

Office of Environmental Management (EM)

neutrality. Download the presentation. Advancing Energy Systems through Integration Ever-Green Energy shared their experiences with integrated energy system planning and design,...

176

Life Cycle Assessment of district heat production in a straw fired CHP plant  

Science Journals Connector (OSTI)

Abstract Due to concerns about the sustainability of the energy sector, conversion of biomass to energy is increasing its hold globally. Life Cycle Impact Assessment (LCIA) is being adopted as an analytical tool to assess the environmental impacts in the entire cycle of biomass production and conversions to different products. This study deals with the LCIA of straw conversion to district heat in a Combined Heat and Power (CHP) plant and in a district heating boiler (producing heat only). Environmental impact categories are Global Warming Potential (GWP), Acidification Potential (AP), aquatic and terrestrial Eutrophication Potential (EP) and Non-Renewable Energy (NRE) use. In the case of CHP, the co-produced electricity is assumed to displace the marginal Danish electricity mix. The current study showed that straw fired in the CHP plant would lead to a GWP of ?187 g CO2-eq, AP 0.01 m2 UES (un-protected ecosystem), aquatic EP 0.16 g NO3-eq, terrestrial EP 0.008 m2 UES, and NRE use ?0.14 MJ-primary per 1 MJ heat production. Straw conversion to heat in the CHP plant showed better environmental performances compared to the district heating boiler. Furthermore, removing straw from the field is related to the consequence e.g. decline in soil carbon sequestration, limiting soil nutrient availability, and when compared with natural gas the conversion of straw to heat would lead to a higher aquatic and terrestrial EP and AP. The study also outlays spaces for the detail sustainability assessment of straw conversion in a biorefinery and compare with the current study.

Ranjan Parajuli; Søren Løkke; Poul Alberg Østergaard; Marie Trydeman Knudsen; Jannick H. Schmidt?; Tommy Dalgaard

2014-01-01T23:59:59.000Z

177

Fluidized bed heat treating system  

DOE Patents (OSTI)

Systems for heat treating materials are presented. The systems typically involve a fluidized bed that contains granulated heat treating material. In some embodiments a fluid, such as an inert gas, is flowed through the granulated heat treating medium, which homogenizes the temperature of the heat treating medium. In some embodiments the fluid may be heated in a heating vessel and flowed into the process chamber where the fluid is then flowed through the granulated heat treating medium. In some embodiments the heat treating material may be liquid or granulated heat treating material and the heat treating material may be circulated through a heating vessel into a process chamber where the heat treating material contacts the material to be heat treated. Microwave energy may be used to provide the source of heat for heat treating systems.

Ripley, Edward B; Pfennigwerth, Glenn L

2014-05-06T23:59:59.000Z

178

Assessment of district heating and cooling supply from Goudey Generating Station  

SciTech Connect

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

179

Air heating system  

DOE Patents (OSTI)

A self-starting, fuel-fired, air heating system including a vapor generator, a turbine, and a condenser connected in a closed circuit such that the vapor output from the vapor generator is conducted to the turbine and then to the condenser where it is condensed for return to the vapor generator. The turbine drives an air blower which passes air over the condenser for cooling the condenser. Also, a condensate pump is driven by the turbine. The disclosure is particularly concerned with the provision of heat exchanger and circuitry for cooling the condensed fluid output from the pump prior to its return to the vapor generator.

Primeau, John J. (19800 Seminole Rd., Euclid, OH 44117)

1983-03-01T23:59:59.000Z

180

District cooling gets hot  

SciTech Connect

Utilities across the country are adopting cool storage methods, such as ice-storage and chilled-water tanks, as an economical and environmentally safe way to provide cooling for cities and towns. The use of district cooling, in which cold water or steam is pumped to absorption chillers and then to buildings via a central community chiller plant, is growing strongly in the US. In Chicago, San Diego, Pittsburgh, Baltimore, and elsewhere, independent district-energy companies and utilities are refurbishing neglected district-heating systems and adding district cooling, a technology first developed approximately 35 years ago.

Seeley, R.S.

1996-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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

Heat and Power Systems Design  

E-Print Network (OSTI)

HEAT AND POWER SYSTEMS DESIGN H. D. Spriggs and J. V. Shah, Leesburg. VA ABSTRACT The selection of heat and power systems usually does not include a thorough analysis of the process heating. cooling and power requirements. In most cases..., these process requirements are accepted as specifications before heat and power systems are selected and designed. In t~is article we describe how Process Integration using Pinch Technology can be used to understand and achieve the minimum process heating...

Spriggs, H. D.; Shah, J. V.

182

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

SciTech Connect

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

183

Study of Applications of Solar Heating Systems with Seasonal Storage in China  

E-Print Network (OSTI)

In most northern parts of China, it is cold in winter and needs space heating in winter. This paper studies applications of solar heating systems with seasonal storage in China. A typical residential district was selected, and a solar heating system...

Yu, G.; Zhao, X.; Chen, P.

2006-01-01T23:59:59.000Z

184

NETL: Gasification Systems - Projects by State with Congressional District  

NLE Websites -- All DOE Office Websites (Extended Search)

Projects by State Projects by State Gasification Systems Projects by State with Congressional District State Performer Congressional District Alabama National Carbon Capture Center at the Power Systems Development Facility-Project List Modification of the Developmental Pressure Decoupled Advanced Coal (PDAC) Feeder Long-Term Refractory Durability Tests (Transport Gasifier) Long-Term Candle Filter Tests (Transport Gasifier) Water-Gas Shift Tests to Reduce Steam Use Southern Company Services, Inc. AL07 High Hydrogen, Low Methane Syngas from Low-Rank Coals for Coal-to-Liquids Production Southern Research Institute AL07 California Dry Solids Pump Coal Feed Technology Aerojet Rocketdyne CA30 Colorado A Cost-Effective Oxygen Separation System Based on Open Gradient Magnetic Field by Polymer Beads ITN Energy Systems CO01

185

Heat Exchangers for Solar Water Heating Systems | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heat Exchangers for Solar Water Heating Systems Heat Exchangers for Solar Water Heating Systems Heat Exchangers for Solar Water Heating Systems May 30, 2012 - 3:40pm Addthis Image of a heat exchanger. | Photo from iStockphoto.com Image of a heat exchanger. | Photo from iStockphoto.com Solar water heating systems use heat exchangers to transfer solar energy absorbed in solar collectors to the liquid or air used to heat water or a space. Heat exchangers can be made of steel, copper, bronze, stainless steel, aluminum, or cast iron. Solar heating systems usually use copper, because it is a good thermal conductor and has greater resistance to corrosion. Types of Heat Exchangers Solar water heating systems use three types of heat exchangers: Liquid-to-liquid A liquid-to-liquid heat exchanger uses a heat-transfer fluid that

186

[Waste water heat recovery system  

SciTech Connect

The production capabilities for and field testing of the heat recovery system are described briefly. Drawings are included.

Not Available

1993-04-28T23:59:59.000Z

187

International District Energy Association | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

International District Energy Association International District Energy Association International District Energy Association November 1, 2013 - 11:40am Addthis International District Energy Association logo 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

188

Accumulated CFC-11 in polyurethane foam insulation: an estimate of the total amount in district heating installations in Sweden  

Science Journals Connector (OSTI)

In rigid polyurethane foam used for thermal insulation, CFC-11 has been the main blowing agent for many years, but is now subject to phase-out regulations. During ageing of this foam, air diffuses into it and blowing agents leak into the atmosphere, resulting in a decreased insulating capacity. Determinations of the cell gas composition and the total content of CFC-11 in foam from district heating installations of different ages are reported in this paper. The total amount of CFC-11 in old district heating schemes in Sweden is estimated at 2000 tonnes. The amount in refrigeration equipment in Sweden is about twice as large.

M. Svanstrom

1996-01-01T23:59:59.000Z

189

Process Heating Systems | Department of Energy  

Office of Environmental Management (EM)

Efficiency in Process Heating Systems Roadmap for Process Heating Technology Reduce Natural Gas Use in Your Industrial Process Heating Systems Save Energy Now in Your Process...

190

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2: Combined Power and Biomass Heating System, Fort Yukon, 2: Combined Power and Biomass Heating System, Fort Yukon, Alaska EA-1922: Combined Power and Biomass Heating System, Fort Yukon, Alaska SUMMARY 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. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD May 6, 2013 EA-1922: Finding of No Significant Impact Combined Power and Biomass Heating System, Fort Yukon, Alaska

191

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2: Combined Power and Biomass Heating System, Fort Yukon, 2: Combined Power and Biomass Heating System, Fort Yukon, Alaska EA-1922: Combined Power and Biomass Heating System, Fort Yukon, Alaska SUMMARY 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. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD May 6, 2013 EA-1922: Finding of No Significant Impact Combined Power and Biomass Heating System, Fort Yukon, Alaska

192

I'SOT Canby District Heating Project, Modoc County, California Final Environmental Assessment  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

March 17, 2003 Dear Stakeholder: SUBJECT: NOTICE OF AVAILABILITY OF FINAL ENVIRONMENTAL ASSESSMENT OF THE PROPOSED IN SEARCH OF TRUTH CANBY DISTRICT HEATING PROJECT, MODOC COUNTY, CALIFORNIA (DOE/EA 1460) The U.S. Department of Energy's (DOE's) Golden Field Office (GO) has issued the final Environmental Assessment (EA) and a Finding of No Significant Impact (FONSI) for the subject geothermal project. These documents are available online in the GO electronic reading room at www.golden.doe.gov. Copies of the documents can be obtained by contacting Steve Blazek at the address and telephone number listed below. GO has prepared the final EA and FONSI in accordance with the National Environmental Policy Act (NEPA) and DOE's NEPA implementation guidance.

193

Heat Machines and Quantum Systems  

E-Print Network (OSTI)

Heat Machines and Quantum Systems: Towards the Third Law Thesis submitted for the degree of "Doctor Machines and Quantum Systems: Towards the Third Law Thesis submitted for the degree of "Doctor

Kosloff, Ronnie

194

PIA - Northeast Home Heating Oil Reserve System (Heating Oil...  

Office of Environmental Management (EM)

Home Heating Oil Reserve System (Heating Oil) More Documents & Publications PIA - WEB Physical Security Major Application PIA - GovTrip (DOE data) PIA - WEB Unclassified...

195

Water geochemistry of hydrothermal systems, Wood River District, Idaho  

SciTech Connect

Hydrothermal systems of the Wood River District, central Idaho, have been studied by geologic mapping of thermal spring areas and geochemical investigations of thermal and non-thermal waters. This report summarizes the new geochemical data gathered during the study. Integration of the results of geological and geochemical studies has led to development of a target model for hydrothermal resources on the margin of the Idaho Batholith. Warfield Hot Springs, with temperatures up to 58/sup 0/C, flow from a major shear zone along the margin of an apophysis of the batholith. Hailey Hot Springs, with temperatures up to 60/sup 0/C, occur in an area of multiple thrust faults and newly recognized, closely spaced normal faults in the Paleozoic Milligen and Wood River Formations, 2.5 km from a highly brecciated batholith contact. Other Wood River district hydrothermal systems also occur along the margins of batholith apophyses or in adjacent highly fractured Paleozoic rocks, where there are indications of batholith rocks at shallow depths (100 to 300 m) in water wells.

Zeisloft, J.; Foley, D.; Blackett, R.

1983-08-01T23:59:59.000Z

196

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

Energy.gov (U.S. Department of Energy (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...

197

E-Print Network 3.0 - advanced industrial heat Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Management and Air Flow) - Waste Heat Recovery in Industrial Processes... on roads - District heating systems - Various industrial processes Geothermal Heat Pumps -...

198

INSULATION OF HEATING SYSTEMS  

Science Journals Connector (OSTI)

... C. PALLOT gave a Cantor Lecture to the Royal Society of Arts on “Thermal Insulation at Medium Temperature” on November 23 ; the lecture, which included many topics of ... many topics of current interest, has now been published1. In a bulletin on heat insulation issued by the Ministry of Fuel and Power, it was pointed out that "In ...

1943-05-22T23:59:59.000Z

199

Waste Heat Management Options: Industrial Process Heating Systems  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heat Management Options Heat Management Options Industrial Process Heating Systems By Dr. Arvind C. Thekdi E-mail: athekdi@e3minc.com E3M, Inc. August 20, 2009 2 Source of Waste Heat in Industries * Steam Generation * Fluid Heating * Calcining * Drying * Heat Treating * Metal Heating * Metal and Non-metal Melting * Smelting, agglomeration etc. * Curing and Forming * Other Heating Waste heat is everywhere! Arvind Thekdi, E3M Inc Arvind Thekdi, E3M Inc 3 Waste Heat Sources from Process Heating Equipment * Hot gases - combustion products - Temperature from 300 deg. F. to 3000 deg.F. * Radiation-Convection heat loss - From temperature source of 500 deg. F. to 2500 deg. F. * Sensible-latent heat in heated product - From temperature 400 deg. F. to 2200 deg. F. * Cooling water or other liquids - Temperature from 100 deg. F. to 180 deg. F.

200

Solar air heating system for combined DHW and space heating  

E-Print Network (OSTI)

Solar air heating system for combined DHW and space heating solar air collector PV-panel fannon-return valve DHW tank mantle cold waterhot water roof Solar Energy Centre Denmark Danish Technological Institute SEC-R-29 #12;Solar air heating system for combined DHW and space heating Søren �stergaard Jensen

Note: This page contains sample records for the topic "district heating system" 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

Heating System Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heating System Basics Heating System Basics Heating System Basics August 16, 2013 - 2:32pm Addthis A variety of heating technologies are available today. You can learn more about what heating systems and heat pumps are commonly used today and how they work below. To learn how to use these technologies in your own home, see the Home Heating Systems section on Energy Saver. Furnaces and Boilers Furnaces heat air and distribute the heated air through a building using ducts. Boilers heat water, providing either hot water or steam for heating. Wood and Pellet Heating Provides a way to heat a building using biomass or waste sources. Electric Resistance Heating Can be supplied by centralized electric furnaces or by heaters in each room. Active Solar Heating Uses the sun to heat either air or liquid and can serve as a supplemental

202

Heating System Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heating System Basics Heating System Basics Heating System Basics August 16, 2013 - 2:32pm Addthis A variety of heating technologies are available today. You can learn more about what heating systems and heat pumps are commonly used today and how they work below. To learn how to use these technologies in your own home, see the Home Heating Systems section on Energy Saver. Furnaces and Boilers Furnaces heat air and distribute the heated air through a building using ducts. Boilers heat water, providing either hot water or steam for heating. Wood and Pellet Heating Provides a way to heat a building using biomass or waste sources. Electric Resistance Heating Can be supplied by centralized electric furnaces or by heaters in each room. Active Solar Heating Uses the sun to heat either air or liquid and can serve as a supplemental

203

Reduction in air emissions attainable through implementation of district heating and cooling  

SciTech Connect

District heating and cooling (DHC) can provide multiple opportunities to reduce air emissions associated with space conditioning and electricity generation, which contribute 30% to 50% of all such emissions. When DHC is combined with cogeneration (CHP), maximum reductions in sulfur oxides (SO{sub x}), nitrogen oxides (NO{sub x}), carbon dioxide (CO{sub 2}), particulates, and ozone-depleting chlorofluorocarbon (CFC) refrigerants can most effectively be achieved. Although significant improvements in air quality have been documented in Europe and Scandinavia due to DHC and CHP implementation, accurately predicting such improvements has been difficult. Without acceptable quantification methods, regulatory bodies are reluctant to grant air emissions credits, and local community leaders are unwilling to invest in DHC and CHP as preferred methods of providing energy or strategies for air quality improvement. The recent development and release of a number of computer models designed specifically to provide quantification of air emissions that can result from DHC and CHP implementation should help provide local, state, and national policymakers with information vital to increasing support and investment in DHC development.

Bloomquist, R.G. [Washington State Energy Office, Olympia, WA (United States)

1996-12-31T23:59:59.000Z

204

Nebraska Public Power District - Residential Energy Efficiency Rebate  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Nebraska Public Power District - Residential Energy Efficiency Nebraska Public Power District - Residential Energy Efficiency Rebate Programs Nebraska Public Power District - Residential Energy Efficiency Rebate Programs < Back Eligibility Construction Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Maximum Rebate Attic Insulation: $300 Program Info State Nebraska Program Type Utility Rebate Program Rebate Amount Air-Source Heat Pumps: 14 SEER - $200, 15 SEER - $400, 16+ SEER $600 Ground Source Heat Pumps: $1,200 Variable Capacity Ground Source Heat Pumps: $1,700 Heat Pump > 14 SEER (Contractor): $50 Cooling System Tune-Up: $30 Attic Insulation: $0.15/sq. ft. Provider Nebraska Public Power District The Nebraska Public Power District offers rebates to homeowners who purchase energy efficient heat pumps, upgrade their insulation, and/or have

205

Heat Pump System Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heat Pump System Basics Heat Pump System Basics Heat Pump System Basics August 19, 2013 - 11:02am Addthis Like a refrigerator, heat pumps use electricity to move heat from a cool space into a warm space, making the cool space cooler and the warm space warmer. Because they move heat rather than generate heat, heat pumps can provide up to four times the amount of energy they consume. Air-Source Heat Pump Transfers heat between the inside of a building and the outside air. Ductless Mini-Split Heat Pump Ductless versions of air-source heat pumps. Absorption Heat Pump Uses heat as its energy source. Geothermal Heat Pumps Use the constant temperature of the earth as the exchange medium instead of the outside air temperature. Addthis Related Articles A heat pump can provide an alternative to using your air conditioner. | Photo courtesy of iStockPhoto/LordRunar.

206

Liquid Phase Heating Systems  

E-Print Network (OSTI)

saturation pressure is ju'st under 278 psig. To this, pump head, pump NPSH and static head due to elevated piping must l be added to arrive at total pressure in a steam cushioned HTW system. Nitrogen cushioned systems are more common, and expansion...

Mordt, E. H.

1979-01-01T23:59:59.000Z

207

Simulation Models for Improved Water Heating Systems  

E-Print Network (OSTI)

The DLM accounts for the distribution heat loss within eachHot-Water Distribution System Piping Heat Loss Factors—PhaseHot Water Distribution System Piping Heat Loss Factors-

Lutz, Jim

2014-01-01T23:59:59.000Z

208

Retrofitting the Strogino district heat supply station with construction of a 260-MW combined-cycle power plant (Consisting of two PGU-130 combined-cycle power units)  

Science Journals Connector (OSTI)

The retrofitting carried out at the Strogino district heat supply station and the specific features of works accomplished in the course of constructing the thermal power station based on a combined-cycle power pl...

V. F. Aleksandrov

2010-02-01T23:59:59.000Z

209

Differential rates for district heating and the influence on the optimal retrofit strategy for multi-family buildings  

Science Journals Connector (OSTI)

When renovating existing multi-family buildings it is very important to implement the best retrofit strategy possible in order to minimize the remaining life-cycle cost for the building. If the building is heated with district heating this strategy of course changes due to the energy rate used by the utility. It is also very important for the utility that the consumer is encouraged to save energy when there is a need for it, i.e. during peak load conditions. Our paper shows that an accurate cost differential rate provides all these facilities.

Stig-Inge Gustafsson; Björn G. Karlsson; Bertil H. Sjöholm

1987-01-01T23:59:59.000Z

210

Heat pump having improved defrost system  

DOE Patents (OSTI)

A heat pump system includes, in an operable relationship for transferring heat between an exterior atmosphere and an interior atmosphere via a fluid refrigerant: a compressor; an interior heat exchanger; an exterior heat exchanger; an accumulator; and means for heating the accumulator in order to defrost the exterior heat exchanger. 2 figs.

Chen, F.C.; Mei, V.C.; Murphy, R.W.

1998-12-08T23:59:59.000Z

211

Effects of boosting the supply temperature on pipe dimensions of low-energy district heating networks: A case study in Gladsaxe, Denmark  

Science Journals Connector (OSTI)

Abstract This paper presents a method for the dimensioning of the low-energy District Heating (DH) piping networks operating with a control philosophy of supplying heat in low-temperature such as 55 °C in supply and 25 °C in return regularly while the supply temperature levels are being boosted in cold winter periods. The performance of the existing radiators that were formerly sized with over-dimensions was analyzed, its results being used as input data for the performance evaluation of the piping network of the low-energy DH system operating with the control philosophy in question. The optimization method was performed under different mass flow limitations that were formed with various temperature configurations. The results showed that reduction in the mass flow rate requirement of a district is possible by increasing the supply temperature in cold periods with significant reduction in heat loss from the DH network. Sensitivity analysis was carried out in order to evaluate the area of applicability of the proposed method. Hence varied values of the original capacity and the current capacity of the existing radiators were evaluated with the design temperature values that were defined by two former radiator sizing standards.

Hakan ?. Tol; Svend Svendsen

2014-01-01T23:59:59.000Z

212

Underground Storage Tank Management (District of Columbia)  

Energy.gov (U.S. Department of Energy (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...

213

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...

214

Community Renewable Energy Success Stories Webinar: District...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

215

Waste Heat Management Options: Industrial Process Heating Systems  

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

itself * Waste heat recovery or auxiliary or adjoining systems within a plant * Waste heat to power conversion Recycle Copyrighted - E3M Inc. August 20, 2009 Arvind Thekdi, E3M...

216

Heat Distribution Systems | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Distribution Systems Distribution Systems Heat Distribution Systems May 16, 2013 - 5:26pm Addthis Radiators are used in steam and hot water heating. | Photo courtesy of ©iStockphoto/Jot Radiators are used in steam and hot water heating. | Photo courtesy of ©iStockphoto/Jot Heat is distributed through your home in a variety of ways. Forced-air systems use ducts that can also be used for central air conditioning and heat pump systems. Radiant heating systems also have unique heat distribution systems. That leaves two heat distribution systems -- steam radiators and hot water radiators. Steam Radiators Steam heating is one of the oldest heating technologies, but the process of boiling and condensing water is inherently less efficient than more modern systems, plus it typically suffers from significant lag times between the

217

Heat Pump Systems | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Pump Systems Pump Systems Heat Pump Systems May 16, 2013 - 5:33pm Addthis A heat pump can provide an alternative to using your air conditioner. | Photo courtesy of iStockPhoto/LordRunar. A heat pump can provide an alternative to using your air conditioner. | Photo courtesy of iStockPhoto/LordRunar. What does this mean for me? Heat pumps can supply heat, cooling, and hot water. Your climate and site will determine the type of heat pump most appropriate for your home. For climates with moderate heating and cooling needs, heat pumps offer an energy-efficient alternative to furnaces and air conditioners. Like your refrigerator, heat pumps use electricity to move heat from a cool space to a warm space, making the cool space cooler and the warm space warmer. During the heating season, heat pumps move heat from the cool outdoors into

218

The Operation Management and Energy Consumption Analysis of the District Cooling System  

E-Print Network (OSTI)

Based on the investigation of the district cooling system of the Zhongguancun Square in Beijing, we thoroughly analyzed the process of its operation management and the main factors that affect energy consumption. The basis was provided...

Xu, Q.; Li, D.; Xu, W.

2006-01-01T23:59:59.000Z

219

Remote Sensing Assessment Of Karez Irrigation Systems And Archaeological Resources In Maywand District, Kandahar Province, Afghanistan  

E-Print Network (OSTI)

This dissertation focuses on the history, diffusion, and cultural significance of the karez, a form of traditional irrigation system, based on a case study of Maywand District in Kandahar Province, Afghanistan. Remote ...

Egitto, Antoinette

2013-12-31T23:59:59.000Z

220

Experimental Research on Solar Assisted Heat Pump Heating System with Latent Heat Storage  

E-Print Network (OSTI)

-reaching meaning of solving energy and environment problems if new type energy conservation and environment protection heating system ? solar assisted ground-source heat pump (SAGHP) heating system with a latent heat storage tank will be practical... was established at the laboratory of construction energy conservation in Harbin Institute of Technology (HIT) in 2004. It added a latent heat storage tank in original SAGHP system. The schematic diagram of the system is shown in Figure 1. The experimental...

Han, Z.; Zheng, M.; Liu, W.; Wang, F.

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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

Simplified thermoeconomic approach to cost allocation in acombined cycle cogeneration and district energy system  

E-Print Network (OSTI)

of the requirements for the degree of MASTER OF SCIENCE May 1997 Major Subject: Mechanical Engineering SIMPLIFIED THERMOECONOMIC APPROACH TO COST ALLOCATION IN A COMBINED CYCLE COGENERATION AND DISTRICT ENERGY SYSTEM A Thesis By JASON GRAHAM FLEMING... (Member) Jerald Caton (Head of Department) May 1997 lviajor Sui&ject: lviechanical Engineering ABSTRACT Simplified Thermoeconomic Approach to Cost Allocation in a Combined Cycle Cogeneration and District Energy System. (May 1997) Jason Graham...

Fleming, Jason Graham

1997-01-01T23:59:59.000Z

222

Use of GIS as a Real Time Decision Support System for Irrigation Districts  

E-Print Network (OSTI)

The use of GIS as a Real Time Decision Support System for Irrigation Districts Gabriele Bonaiti & Guy Fipps, P.E. Texas A&M AgriLife Extension Service, Biological & Agricultural Engineering Texas Water Resources Institute TR-435 December 2012... USE OF GIS AS A REAL TIME DECISION SUPPORT SYSTEM FOR IRRIGATION DISTRICTS Rio Grande Basin Initiative Irrigation Technology Program Texas A&M AgriLife Extension Service USE OF GIS AS A REAL TIME DECISION SUPPORT...

Bonaiti, G.; Fipps, G.

223

Cogeneration Personal Property Tax Credit (District of Columbia) |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Cogeneration Personal Property Tax Credit (District of Columbia) Cogeneration Personal Property Tax Credit (District of Columbia) Cogeneration Personal Property Tax Credit (District of Columbia) < Back Eligibility Commercial Industrial Residential Savings Category Commercial Heating & Cooling Manufacturing Buying & Making Electricity Solar Heating & Cooling Heating Program Info Start Date 07/25/2012 State District of Columbia Program Type Property Tax Incentive Rebate Amount 100% exemption Provider Energy Division The District of Columbia Council created a personal property tax exemption for solar energy systems and cogeneration systems within the District by enacting B19-0749 in December of 2012. Eligible solar systems Solar energy is defined by D.C. Code § 34-1431 to mean "radiant energy, direct, diffuse, or reflected, received from the sun

224

Heat pumps and under floor heating as a heating system for Finnish low-rise residential buildings.  

E-Print Network (OSTI)

??In bachelor’s thesis the study of under floor heating system with ground source heat pump for the heat transfers fluid heating is considered. The case… (more)

Chuduk, Svetlana

2010-01-01T23:59:59.000Z

225

Design of Heat Exchanger for Heat Recovery in CHP Systems  

E-Print Network (OSTI)

The objective of this research is to review issues related to the design of heat recovery unit in Combined Heat and Power (CHP) systems. To meet specific needs of CHP systems, configurations can be altered to affect different factors of the design...

Kozman, T. A.; Kaur, B.; Lee, J.

226

Geographic information system (GIS) and simulation model for management of irrigation districts  

E-Print Network (OSTI)

APPENDIX C. . . . . . . . . 155 LIST OF FIGURES Page Figure 1-The structure of integration process. . . 28 Figure 2-Fields of the hypothetical district. . . 29 Figure 3-Fields and the conveyance systems of the hypothetical district . . . . . . . 30... Table 3. Input and output data for SIMWETH . . 42 Table 4. Potential and dry land seed cotton yields, and seed cotton yields under irrigations of 40, 50, and 60 percent management allowed depletion levels, for the period 1988 to 1993 (Endale, 1995...

Nazarov, Azimjon S.

2000-01-01T23:59:59.000Z

227

Optimization of the Heating System Operation  

E-Print Network (OSTI)

on the basis of the variation of outdoor temperature, and in this way, the heating system can be optimized....

Xu, W.; Mao, S.

2006-01-01T23:59:59.000Z

228

Chapter 5 - Solar Water-Heating Systems  

Science Journals Connector (OSTI)

Abstract Chapter 5 is on solar water-heating systems. Both passive and active systems are described. Passive systems include thermosiphon and integrated collector storage systems. The former include theoretical performance of thermosiphon solar water heaters, reverse circulation in thermosiphon systems, vertical against horizontal tank configurations, freeze protection, and tracking thermosiphons. Subsequently, active systems are described, which include direct circulation systems, indirect water-heating systems, air water-heating systems, heat pump systems and pool heating systems, which include the analysis of various heat losses like evaporation, radiation, convection heat losses, make-up water load, and solar radiation-heat gain. Then the characteristics and thermal analysis of heat storage systems for both water and air systems are presented. The module and array design methods are then described and include the effects of shading, thermal expansion, galvanic corrosion, array sizing, heat exchangers, pipe and duct losses, partially shaded collectors and over-temperature protection—followed by an analysis of the characteristics of differential thermostats. Finally, methods to calculate the hot water demand are given as well as a review of international standards used to evaluate the solar water heaters performance. The chapter includes also simple system models and practical considerations for the setup of solar water-heating systems, which include: pipes, supports and insulation; pumps; valves and instrumentation.

Soteris A. Kalogirou

2014-01-01T23:59:59.000Z

229

Urban Sewage Delivery Heat Transfer System (2): Heat Transfer  

E-Print Network (OSTI)

The thimble delivery heat-transfer (TDHT) system is one of the primary modes to utilize the energy of urban sewage. Using the efficiency-number of transfer units method ( ), the heat-transfer efficiencies of the parallel-flow and reverse-flow TDTH...

Zhang, C.; Wu, R.; Li, X.; Li, G.; Zhuang, Z.; Sun, D.

2006-01-01T23:59:59.000Z

230

,,,"Electricity","Natural Gas","Fuel Oil","District Heat","District Chilled Water","Propane","Othera"  

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

8. Energy Sources, Floorspace, 1999" 8. Energy Sources, Floorspace, 1999" ,"Total Floorspace (million square feet)" ,"All Buildings","All Buildings Using Any Energy Source","Energy Sources Used (more than one may apply)" ,,,"Electricity","Natural Gas","Fuel Oil","District Heat","District Chilled Water","Propane","Othera" "All Buildings ................",67338,65753,65716,45525,13285,5891,2750,6290,2322 "Building Floorspace" "(Square Feet)" "1,001 to 5,000 ...............",6774,6309,6280,3566,620,"Q","Q",635,292 "5,001 to 10,000 ..............",8238,7721,7721,5088,583,"Q","Q",986,"Q"

231

Seven Ways to Optimize Your Process Heat System | Department...  

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

Optimize Your Process Heat System This brief outlines the seven Best Bets for Process Heating System Savings and Improvements. Seven Ways to Optimize Your Process Heat System...

232

EECBG Success Story: Energy Efficiency Upgrades Part of Winning Formula for Oregon School District  

Energy.gov (U.S. Department of Energy (DOE))

The rural community of Vernonia, Oregon is incorporating energy efficiency measures into the school district buildings, including an energy efficient integrated heating and cooling system. This feature, along with upgrades to the building envelope and lighting, are estimated to reduce the school district’s annual energy usage by 43 percent. Learn more.

233

Heat engine generator control system  

DOE Patents (OSTI)

An electrical power generation system includes a heat engine having an output member operatively coupled to the rotor of a dynamoelectric machine. System output power is controlled by varying an electrical parameter of the dynamoelectric machine. A power request signal is related to an engine speed and the electrical parameter is varied in accordance with a speed control loop. Initially, the sense of change in the electrical parameter in response to a change in the power request signal is opposite that required to effectuate a steady state output power consistent with the power request signal. Thereafter, the electrical parameter is varied to converge the output member speed to the speed known to be associated with the desired electrical output power.

Rajashekara, Kaushik (Carmel, IN); Gorti, Bhanuprasad Venkata (Towson, MD); McMullen, Steven Robert (Anderson, IN); Raibert, Robert Joseph (Fishers, IN)

1998-01-01T23:59:59.000Z

234

Heat engine generator control system  

DOE Patents (OSTI)

An electrical power generation system includes a heat engine having an output member operatively coupled to the rotor of a dynamoelectric machine. System output power is controlled by varying an electrical parameter of the dynamoelectric machine. A power request signal is related to an engine speed and the electrical parameter is varied in accordance with a speed control loop. Initially, the sense of change in the electrical parameter in response to a change in the power request signal is opposite that required to effectuate a steady state output power consistent with the power request signal. Thereafter, the electrical parameter is varied to converge the output member speed to the speed known to be associated with the desired electrical output power. 8 figs.

Rajashekara, K.; Gorti, B.V.; McMullen, S.R.; Raibert, R.J.

1998-05-12T23:59:59.000Z

235

Thermostatically controlled solar heating and cooling system  

SciTech Connect

This patent describes a solar heating and cooling system for simultaneously heating or cooling an ambient air system within a building, heating a hot water supply for domestic use within the building and heating or cooling a swimming pool adjacent the building comprising a building. This comprises a swimming pool as a primary water source, a solar connector connected to the swimming pool, a heat pump for controlling ambient air temperature within the building, an energy conservation unit connected to the heat pump and to the hot water supply for utilizing hot gases from the heat pump to heat water in the hot water supply and an air heat exchanger connected to the air system and to the heat pump for selectively heating or cooling air in the building. Also a water heat exchanger is connected to a water source for selectively transferring heat between the heat pump and the water source, a well as a secondary water source connected to the water heat exchanger.

Yovanofski, T.

1986-12-16T23:59:59.000Z

236

International District Energy Association  

Energy.gov (U.S. Department of Energy (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.

237

Sundstrand waste heat recovery system  

SciTech Connect

The two programs discussed in this report deal with the use of organic Rankine cycle systems as a means of producing electrical or mechanical power from energy in industrial processes' exhaust. Both programs deal with the design, development, demonstration, and economic evaluation of a 600kWe organic Rankine cycle system designed to recover energy from the exhaust of industrial processes with exhaust gas temperatures of 600/sup 0/F or above. The work done has, through the successful operation of the units installed, demonstrated the technical feasibility of utilizing an organic Rankine cycle bottoming system as a means of conserving energy through waste heat utilization. Continued operation at several sites has also demonstrated the soundness of the design, overall system reliability, and low operating cost. In addition, the basis under which this technology is economically viable in industrial applications was established. As a result of market studies and experience gained from the application of the units addressed in this report, it is concluded that there is a significant market for the equipment at the installed cost level of $1200/kWe to $1500/kWe and that this goal is achievable in the proper manufacturing environment. 54 figs., 2 tabs.

Not Available

1984-03-01T23:59:59.000Z

238

Central Lincoln People's Utility District - Renewable Energy Incentive  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Central Lincoln People's Utility District - Renewable Energy Central Lincoln People&#039;s Utility District - Renewable Energy Incentive Program (Oregon) Central Lincoln People's Utility District - Renewable Energy Incentive Program (Oregon) < Back Eligibility Commercial Nonprofit Residential Savings Category Solar Buying & Making Electricity Home Weatherization Water Heating & Cooling Water Heating Wind Maximum Rebate PV (Residential): $2,000 PV (Commercial): $5,000 Solar Water Heating: $800 Wind: $5,000 Hydro Electric: $5,000 Program Info State Oregon Program Type Utility Rebate Program Rebate Amount PV and Wind: $500/kW-DC Solar Water Heating: $800/system Hydro Electric: $0.50/kWh (first year) Provider Central Lincoln People's Utility District Central Lincoln People's Utility District provides financial incentives for

239

Waste Heat Recapture from Supermarket Refrigeration Systems  

SciTech Connect

The objective of this project was to determine the potential energy savings associated with improved utilization of waste heat from supermarket refrigeration systems. Existing and advanced strategies for waste heat recovery in supermarkets were analyzed, including options from advanced sources such as combined heat and power (CHP), micro-turbines and fuel cells.

Fricke, Brian A [ORNL

2011-11-01T23:59:59.000Z

240

Modeling, Estimation, and Control of Waste Heat Recovery Systems  

E-Print Network (OSTI)

organic Rankine cycle waste heat power conversion system. ”Cycle (ORC) System for Waste Heat Recovery. ” Journal ofRankine Cycles in Waste Heat Uti- lizing Processes. ”

Luong, David

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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

Active Solar Heating and Cooling Systems Exemption  

Energy.gov (U.S. Department of Energy (DOE))

Active solar heating and cooling systems may not be assessed at more than the value of a conventional system for property tax purposes. This law applies only to active solar systems and does not...

242

Training: Process Heating Systems | Department of Energy  

Office of Environmental Management (EM)

Process Heating System Assessment - 1-day workshop Availability: Onsite instructor-led and online self-paced workshop This workshop provides an introduction to process...

243

Industrial Steam System Heat-Transfer Solutions  

Energy.gov (U.S. Department of Energy (DOE))

This brief provides an overview of considerations for selecting the best heat-transfer equipment for various steam systems and applications.

244

Energy efficiency and carbon dioxide emissions reduction opportunities in district heating source in Tianjin  

Science Journals Connector (OSTI)

Building a trading market can promote energy conservation provided that the trading method is determined. Energy consumption for heat supply is huge. Tianjin Municipal Government is planning to establish an energ...

Gaofeng Chen; Xuejing Zheng; Lin Cong

2012-09-01T23:59:59.000Z

245

Heat transfer analysis in Stirling engine heat input system  

SciTech Connect

One of the major factor in commercialization of Stirling engine is mass productivity, and the heat input system including tubular heater is one of the obstacles to mass production because of its complexity in shape and difficulty in manufacturing, which resulted from using oxidation-resistant, low-creep alloys which are not easy to machine and weld. Therefore a heater heat exchanger which is very simple in shape and easy to make has been devised, and a burner system appropriate to this heater also has been developed. In this paper specially devised heat input system which includes a heater shell shaped like U-cup and a flame tube located in the heater shell is analyzed in point of heat transfer processes to find optimum heat transfer. To enhance the heat transfer from the flame tube to the heater shell wall, it is required that the flame tube diameter be enlarged as close to the heater shell diameter as possible, and the flame tube temperature be raised as high as possible. But the enlargement of the flame tube diameter should be restricted by the state of combustion affected by hydraulic resistance of combustion gas, and the boost of the flame tube temperature should be considered carefully in the aspects of the flame tube`s service life.

Chung, W.; Kim, S. [LG Electronics Inc., Seoul (Korea, Republic of). Living System Lab.

1995-12-31T23:59:59.000Z

246

Distributed Energy Systems in California's Future: A Preliminary Report Volume 2  

E-Print Network (OSTI)

Summary Centralized District Heating Capital RequirementsCONCLUSIONS . . XVIII. DISTRICT HEATING FOR CALIFORNIAREQUIREMENTS CENTRALIZED DISTRICT HEATING NEIGHBORHOOD SOLAR

Balderston, F.

2010-01-01T23:59:59.000Z

247

DISTRIBUTED ENERGY SYSTEMS IN CALIFORNIA'S FUTURE: A PRELIMINARY REPORT, VOLUME I  

E-Print Network (OSTI)

CONCLUSIONS XVIII. DISTRICT HEATING FOR CALIFORNIAof Buildings. Solar District Heating Solar IndustrialPage CENTRALIZED DISTRICT HEATING NEIGHBORHOOD SOLAR SUB-

Authors, Various

2010-01-01T23:59:59.000Z

248

Waste Heat Management Options for Improving Industrial Process Heating Systems  

Energy.gov (U.S. Department of Energy (DOE))

This presentation covers typical sources of waste heat from process heating equipment, characteristics of waste heat streams, and options for recovery including Combined Heat and Power.

249

ENERGY ABSORBER HEAT PUMP SYSTEM TO SUPPLEMENT HEAT RECOVERY SYSTEMS IN AN INDOOR SWIMMING POOL  

Science Journals Connector (OSTI)

ABSTRACT Compared with convontional indoor swimming pools with traditional plant engineering, the Schwalmtal indoor swimming pool has a final energy consumption of just 40%. This low consumption is achieved by improved insulation of the building's enveloping surface, through the operation of systems for the recovery of heat from drain water and waste air as well as by the operation of a heat pump system to gain ambient heat. The decentralised heat recovery systems met between 40 and 80% of the heat requirements in the supply areas where they were used. The electric heat pump system, which is operated in the bivalent mode in parallel to a heating boiler, could generate 75% of the heat provided by the central heating circuit to meet the residual heat requirements. The report illustrates the structure of the residual heat requirements of the central heating circuit. A description is given of the measured coefficients of performance of the brine/water heat pump connected by a brine circuit with two different energy absorber types - energy stack and energy roof. Finally, the ambient energy gained with the absorbers is broken down into the various kinds of heat gains from radiation, convection, condensation etc. KEYWORDS Energy absorber; energy stack; energy roof; heat pump; heat recovery systems; indoor swimming pool; energy engineering concept.

K. Leisen

1988-01-01T23:59:59.000Z

250

Heat exchanger with auxiliary cooling system  

DOE Patents (OSTI)

A heat exchanger with an auxiliary cooling system capable of cooling a nuclear reactor should the normal cooling mechanism become inoperable. A cooling coil is disposed around vertical heat transfer tubes that carry secondary coolant therethrough and is located in a downward flow of primary coolant that passes in heat transfer relationship with both the cooling coil and the vertical heat transfer tubes. A third coolant is pumped through the cooling coil which absorbs heat from the primary coolant which increases the downward flow of the primary coolant thereby increasing the natural circulation of the primary coolant through the nuclear reactor.

Coleman, John H. (Salem Township, Westmoreland County, PA)

1980-01-01T23:59:59.000Z

251

E-Print Network 3.0 - automated hydraulic system Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

20, 2007 Page 6 District Heating System Regulate pressure drops at end-users c6, c13... Heating System Underlying hydraulic network ... Source: De Persis, Claudio - Dipartimento...

252

Heat transport system, method and material  

DOE Patents (OSTI)

A heat transport system, method and composite material are disclosed in which a plurality of hollow spherical shells or microspheres having an outside diameter of less than or equal to 500 microns are encapsulated or embedded within a bulk material. Each shell has captured therein a volatile working fluid, such that each shell operates as a microsized heat pipe for conducting heat through the composite structure. 1 fig.

Musinski, D.L.

1987-04-28T23:59:59.000Z

253

,,,"Electricity","Natural Gas","Fuel Oil","District Heat","District Chilled Water","Propane","Othera"  

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

7. Energy Sources, Number of Buildings, 1999" 7. Energy Sources, Number of Buildings, 1999" ,"Number of Buildings (thousand)" ,"All Buildings","All Buildings Using Any Energy Source","Energy Sources Used (more than one may apply)" ,,,"Electricity","Natural Gas","Fuel Oil","District Heat","District Chilled Water","Propane","Othera" "All Buildings ................",4657,4403,4395,2670,434,117,50,451,153 "Building Floorspace" "(Square Feet)" "1,001 to 5,000 ...............",2348,2193,2186,1193,220,"Q","Q",215,93 "5,001 to 10,000 ..............",1110,1036,1036,684,74,"Q","Q",124,"Q" "10,001 to 25,000 .............",708,689,688,448,65,24,"Q",74,19

254

Waste heat recovery from the European Spallation Source cryogenic helium plants - implications for system design  

SciTech Connect

The European Spallation Source (ESS) neutron spallation project currently being designed will be built outside of Lund, Sweden. The ESS design includes three helium cryoplants, providing cryogenic cooling for the proton accelerator superconducting cavities, the target neutron source, and for the ESS instrument suite. In total, the cryoplants consume approximately 7 MW of electrical power, and will produce approximately 36 kW of refrigeration at temperatures ranging from 2-16 K. Most of the power consumed by the cryoplants ends up as waste heat, which must be rejected. One hallmark of the ESS design is the goal to recycle waste heat from ESS to the city of Lund district heating system. The design of the cooling system must optimize the delivery of waste heat from ESS to the district heating system and also assure the efficient operation of ESS systems. This report outlines the cooling scheme for the ESS cryoplants, and examines the effect of the cooling system design on cryoplant design, availability and operation.

Jurns, John M. [European Spallation Source ESS AB, P.O. Box 176, 221 00 Lund (Sweden); Bäck, Harald [Sweco Industry AB, P.O. Box 286, 201 22 Malmö (Sweden); Gierow, Martin [Lunds Energikoncernen AB, P.O. Box 25, 221 00 Lund (Sweden)

2014-01-29T23:59:59.000Z

255

Geothermal district piping - A primer  

SciTech Connect

Transmission and distribution piping constitutes approximately 40 -60% of the capital costs of typical geothermal district heating systems. Selections of economical piping suitable for the fluid chemistry is critical. Presently, most piping (56%) in geothermal systems is of asbestos cement construction. Some fiberglass (19%) and steel (19%) is also in use. Identification of an economical material to replace asbestos cement is important to future project development. By providing information on relative costs, purchase considerations, existing material performance and new products, this report seeks to provide a background of information to the potential pipe purchaser. A brief discussion of the use of uninsulated piping in geothermal district heating systems is also provided. 5 refs., 19 figs., 1 tab.

Rafferty, K.

1989-11-01T23:59:59.000Z

256

Modeling of Residential Buildings and Heating Systems  

E-Print Network (OSTI)

-zone building model is used in each case. A model of the heating system is also used for the multi-storey building. Both co-heating and tracer gas measurements are used in order to adjust the parameters of each building model. A complete monitoring...

Masy, G.; Lebrun, J.

2004-01-01T23:59:59.000Z

257

Rankine cycle waste heat recovery system  

DOE Patents (OSTI)

This disclosure relates to a waste heat recovery (WHR) system and to a system and method for regulation of a fluid inventory in a condenser and a receiver of a Rankine cycle WHR system. Such regulation includes the ability to regulate the pressure in a WHR system to control cavitation and energy conversion.

Ernst, Timothy C.; Nelson, Christopher R.

2014-08-12T23:59:59.000Z

258

In situ heat treatment process utilizing a closed loop heating system  

DOE Patents (OSTI)

Systems and methods for an in situ heat treatment process that utilizes a circulation system to heat one or more treatment areas are described herein. The circulation system may use a heated liquid heat transfer fluid that passes through piping in the formation to transfer heat to the formation. In some embodiments, the piping may be positioned in at least two of the wellbores.

Vinegar, Harold J. (Bellaire, TX); Nguyen, Scott Vinh (Houston, TX)

2010-12-07T23:59:59.000Z

259

Multifamily Individual Heating and Ventilation Systems, Lawrence...  

Energy Savers (EERE)

each apartment were much higher than the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) 62.2 rate; an extensive system of ductwork, smoke and...

260

Wood-Burning Heating System Deduction  

Energy.gov (U.S. Department of Energy (DOE))

This statute allows individual taxpayers a deduction for the purchase and installation of a wood-burning heating system. The deduction is equal to the total cost of purchase and installation for...

Note: This page contains sample records for the topic "district heating system" 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

Low-Cost Packaged Combined Heat and Power System | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Low-Cost Packaged Combined Heat and Power System Low-Cost Packaged Combined Heat and Power System Introduction Many combined heat and power (CHP) systems less than 1 megawatt (MW)...

262

Heat Transfer Fluids for Solar Water Heating Systems | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heat Transfer Fluids for Solar Water Heating Systems Heat Transfer Fluids for Solar Water Heating Systems Heat Transfer Fluids for Solar Water Heating Systems May 16, 2013 - 3:02pm Addthis Illustration of a solar water heater. Illustration of a solar water heater. Heat-transfer fluids carry heat through solar collectors and a heat exchanger to the heat storage tanks in solar water heating systems. When selecting a heat-transfer fluid, you and your solar heating contractor should consider the following criteria: Coefficient of expansion - the fractional change in length (or sometimes in volume, when specified) of a material for a unit change in temperature Viscosity - resistance of a liquid to sheer forces (and hence to flow) Thermal capacity - the ability of matter to store heat Freezing point - the temperature below which a liquid turns into a

263

Reduce Natural Gas Use in Your Industrial Process Heating Systems...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Natural Gas Use in Your Industrial Process Heating Systems Reduce Natural Gas Use in Your Industrial Process Heating Systems This fact sheet describes ten effective ways to save...

264

Improving Process Heating System Performance: A Sourcebook for...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Process Heating System Performance: A Sourcebook for Industry, Second Edition Improving Process Heating System Performance: A Sourcebook for Industry, Second Edition This...

265

Flathead Electric Cooperative Facility Geothermal Heat Pump System...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Flathead Electric Cooperative Facility Geothermal Heat Pump System Upgrade Flathead Electric Cooperative Facility Geothermal Heat Pump System Upgrade Project Will Take Advantage of...

266

Ground heat exchanger design for direct geothermal energy systems .  

E-Print Network (OSTI)

??Direct geothermal energy systems use the ground to heat and cool buildings. Ground-source heat pump (GSHP) systems are the most widespread form of direct geothermal… (more)

COLLS, STUART

2013-01-01T23:59:59.000Z

267

Economizer refrigeration cycle space heating and cooling system and process  

DOE Patents (OSTI)

This invention relates to heating and cooling systems and more particularly to an improved system utilizing a Stirling Cycle engine heat pump in a refrigeration cycle. 18 figs.

Jardine, D.M.

1983-03-22T23:59:59.000Z

268

Install Waste Heat Recovery Systems for Fuel-Fired Furnaces  

Energy.gov (U.S. Department of Energy (DOE))

This tip sheet recommends installing waste heat recovery systems for fuel-fired furnaces to increase the energy efficiency of process heating systems.

269

Fuel-Flexible Microturbine and Gasifier System for Combined Heat...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Flexible Microturbine and Gasifier System for Combined Heat and Power Fuel-Flexible Microturbine and Gasifier System for Combined Heat and Power Capstone Turbine Corporation, in...

270

Ultra Efficient Combined Heat, Hydrogen, and Power System - Fact...  

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

Ultra Efficient Combined Heat, Hydrogen, and Power System - Fact Sheet, 2011 Ultra Efficient Combined Heat, Hydrogen, and Power System - Fact Sheet, 2011 FuelCell Energy, Inc., in...

271

Development of an Advanced Combined Heat and Power (CHP) System...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

an Advanced Combined Heat and Power (CHP) System Utilizing Off-Gas from Coke Calcination - Fact Sheet, 2011 Development of an Advanced Combined Heat and Power (CHP) System...

272

Ultra Efficient Combined Heat, Hydrogen, and Power System - Presentati...  

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

Ultra Efficient Combined Heat, Hydrogen, and Power System - Presentation by FuelCell Energy, June 2011 Ultra Efficient Combined Heat, Hydrogen, and Power System - Presentation by...

273

Economizer refrigeration cycle space heating and cooling system and process  

DOE Patents (OSTI)

This invention relates to heating and cooling systems and more particularly to an improved system utilizing a Stirling Cycle engine heat pump in a refrigeration cycle.

Jardine, Douglas M. (Colorado Springs, CO)

1983-01-01T23:59:59.000Z

274

Dynamics of heat transfer between nano systems  

E-Print Network (OSTI)

We develop a dynamical theory of heat transfer between two nano systems. In particular, we consider the resonant heat transfer between two nanoparticles due to the coupling of localized surface modes having a finite spectral width. We model the coupled nanosystem by two coupled quantum mechanical oscillators, each interacting with its own heat bath, and obtain a master equation for the dynamics of heat transfer. The damping rates in the master equation are related to the lifetimes of localized plasmons in the nanoparticles. We study the dynamics towards the steady state and establish connection with the standard theory of heat transfer in steady state. For strongly coupled nano particles we predict Rabi oscillations in the mean occupation number of surface plasmons in each nano particle.

Svend-Age Biehs; Girish S. Agarwal

2012-10-18T23:59:59.000Z

275

GUIDELINES FOR CERTIFICATION OF COMBINED HEAT AND POWER SYSTEMS  

E-Print Network (OSTI)

CALIFORNIA ENERGY COMMISSION GUIDELINES FOR CERTIFICATION OF COMBINED HEAT AND POWER SYSTEMS for Certification of Combined Heat and Power Systems Pursuant to the Waste Heat and Carbon Emissions Reduction Act Heat and Power System Pursuant to the Waste Heat and Carbon Emissions Reduction Act, Public Utilities

276

Control system for fluid heated steam generator  

DOE Patents (OSTI)

A control system for controlling the location of the nucleate-boiling region in a fluid heated steam generator comprises means for measuring the temperature gradient (change in temperature per unit length) of the heating fluid along the steam generator; means for determining a control variable in accordance with a predetermined function of temperature gradients and for generating a control signal in response thereto; and means for adjusting the feedwater flow rate in accordance with the control signal.

Boland, J.F.; Koenig, J.F.

1984-05-29T23:59:59.000Z

277

Commissioning Process and Operational Improvement in the District Heating and Cooling-APCBC  

E-Print Network (OSTI)

-09-25 Proceedings of the 14th International Conference for Enhanced Building Operations, Beijing, China, September 14-17, 2014 18 Energy simulation In case of the variable cooling water flow system, the cooling water outlet temperature should be a parameter...,000 5,000 6,000 7,000 8,000 9,000 10,000 11,000 12,000 13,000 2012/10/072012/10/28 2012/11/18 2012/12/09 2012/12/30 2/24 ? 3/2 C o n su m ed e le ct ri ci ty p er h ea t u n it [ k W h /G J ] Variable water flow control Cooling tower fun Chilled...

Takase,T.; Takada,O; Shima,K.; Moriya, M.; Shimoda,Y.

2014-01-01T23:59:59.000Z

278

Optimal Control Strategy of Solar Heating Systems Using a Long Term Heat Storage  

Science Journals Connector (OSTI)

...the estimation of the energy gain expected from optimizing the control of a given gas/solar heating system using a long term heat storage in the ground.

M. Boucher; M. Pottier; Y. Lenoir; R. Lidin…

1984-01-01T23:59:59.000Z

279

SYSTEM PERFORMANCE OF A STIRLING ENGINE POWERED HEAT ACTIVATED HEAT PUMP  

E-Print Network (OSTI)

AUG 1979 SYSTEM PERFORMANCE OF A STIRLING ENGINE POWERED HEAT ACTIVATED HEAT PUMP W. D. Richards W The development of the first prototype heat activated heat pump (HAHP) jointly sponsored by the Gas Research as a unitary heating and cooling product competing for the same market as is currently served by the gas year

Oak Ridge National Laboratory

280

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.

Note: This page contains sample records for the topic "district heating system" 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

Dual Loop Parallel/Series Waste Heat Recovery System  

Energy.gov (U.S. Department of Energy (DOE))

This system captures all the jacket water, intercooler, and exhaust heat from the engine by utilizing a single condenser to reject leftover heat to the atmosphere.

282

Joule heating and heat transfer in poly(dimethylsiloxane) microfluidic systems  

E-Print Network (OSTI)

Joule heating and heat transfer in poly(dimethylsiloxane) microfluidic systems David Erickson microfluidic/biochip systems must have the ability to rapidly reject this heat to the surroundings. Generally it is the ability to dissipate this heat that limits the strength of the applied electric field and thus the maximum

Erickson, David

283

Field Measurements of Heating System Efficiency in Nine Electrically-Heated Manufactured Homes.  

SciTech Connect

This report presents the results of field measurements of heating efficiency performed on nine manufactured homes sited in the Pacific Northwest. The testing procedure collects real-time data on heating system energy use and heating zone temperatures, allowing direct calculation of heating system efficiency.

Davis, Bob; Siegel, J.; Palmiter, L.; Baylon, D.

1996-07-01T23:59:59.000Z

284

Continuous Commissioning® and Energy Management Control Strategies at Alamo Community College District  

E-Print Network (OSTI)

This paper presents an overview of energy savings through the optimization of facility Heating, Ventilation, and Air Conditioning (HVAC) systems for the college campuses of the Alamo Community College District. This Continuous Commissioning® process...

Martinez, J.; Verdict, M.; Baltazar, J.C.

285

Application Study of a Single House Horizontal Heating System  

E-Print Network (OSTI)

It is imperative to get new heating systems into the market and implement rate structures with heat meters for the purpose of energy conservation and environmental protection. Based on analysis of current heating technology, this paper analyzes...

Hang, Y.; Ying, D.

2006-01-01T23:59:59.000Z

286

Experimental study of a photovoltaic solar-assisted heat-pump/heat-pipe system  

Science Journals Connector (OSTI)

A practical design for a heat pump with heat-pipe photovoltaic/thermal (PV/T) collectors is presented. The hybrid system is called the photovoltaic solar-assisted heat-pump/heat-pipe (PV-SAHP/HP) system. To focus on both actual demand and energy savings, the PV-SAHP/HP system was designed to be capable of operating in three different modes, namely, the heat-pipe, solar-assisted heat pump, and air-source heat-pump modes. Based on solar radiation, the system operates in an optimal mode. A series of experiments were conducted in Hong Kong to study the performance of the system when operating in the heat-pipe and the solar-assisted heat-pump modes. Moreover, energy and exergy analyses were used to investigate the total PV/T performance of the system.

H.D. Fu; G. Pei; J. Ji; H. Long; T. Zhang; T.T. Chow

2012-01-01T23:59:59.000Z

287

Heat flux dynamics in dissipative cascaded systems  

E-Print Network (OSTI)

We study the dynamics of heat flux in the thermalization process of a pair of identical quantum system that interact dissipatively with a reservoir in a {\\it cascaded} fashion. Despite the open dynamics of the bipartite system S is globally Lindbladian, one of the subsystems "sees" the reservoir in a state modified by the interaction with the other subsystem and hence it undergoes a non-Markovian dynamics. As a consequence, the heat flow exhibits a non-exponential time behaviour which can greatly deviate from the case where each party is independently coupled to the reservoir. We investigate both thermal and correlated initial states of $S$ and show that the presence of correlations at the beginning can considerably affect the heat flux rate. We carry out our study in two paradigmatic cases -- a pair of harmonic oscillators with a reservoir of bosonic modes and two qubits with a reservoir of fermionic modes -- and compare the corresponding behaviours. In the case of qubits and for initial thermal states, we find that the trace distance discord is at any time interpretable as the correlated contribution to the total heat flux.

Salvatore Lorenzo; Alessandro Farace; Francesco Ciccarello; G. Massimo Palma; Vittorio Giovannetti

2014-12-19T23:59:59.000Z

288

Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems  

E-Print Network (OSTI)

as other types of air source heat pumps, VRF systems needconventional packaged air source heat pumps. Typical GSHPis basically an air source heat pump), especially when the

Hong, Tainzhen

2010-01-01T23:59:59.000Z

289

Ohio's 13th congressional district: Energy Resources | Open Energy  

Open Energy Info (EERE)

3th congressional district: Energy Resources 3th congressional district: Energy Resources Jump to: navigation, search Equivalent URI DBpedia This article is a stub. You can help OpenEI by expanding it. This page represents a congressional district in Ohio. US Recovery Act Smart Grid Projects in Ohio's 13th congressional district FirstEnergy Service Company Smart Grid Project Registered Energy Companies in Ohio's 13th congressional district A.J. Rose Manufacturing Company Advanced Hydro Solutions Akrong Machine Services Castle Energy Services Echogen Power Systems, Inc. FirstEnergy Free Energy Alliance Green Energy Technologies Green Energy Technologies LLC GreenField Solar Corp. Jennings The Energy Factory Pier Associates, Inc. Randa Energy Solutions LLC R A Energy Solutions Raymond Plumbing & Heating

290

Solar collector for fluid heating system  

SciTech Connect

A solar collector for use in either an upfeed forced hot water heating system or a downfeed system features a pair of serpentine coils arranged in opposing flow relationship within a shallow insulated collector housing having a sealed glass closure panel. The two serpentine coils lie in spaced parallel planes within the housing, and the two coils are offset laterally so that their individual longitudinal loops overlap laterally by approximately one-half the width of each loop. The flow of heated fluid in each serpentine coil is controlled independently of the other coil by a temperature-responsive modulating valve connected in each coil close to the outlet end thereof within the housing. Efficiency of operation and practicality and economy of construction are featured.

Wilson, D.C.

1980-09-30T23:59:59.000Z

291

Ground Source Heat Pump System Data Analysis  

NLE Websites -- All DOE Office Websites (Extended Search)

Peer Review Peer Review GSHP System Data Analysis Xiaobing Liu, Ph.D. Oak Ridge National Laboratory liux2@ornl.gov (865-574-2593) 4/3/2013 - GSHP Data Analysis in 1 st phase of U.S.-China CERC-BEE - GSHP ARRA Grantee Data Mining 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: High first cost of ground heat exchangers (GHXs) and lack of knowledge/trust in achievable benefits are major barriers preventing

292

Ground Source Heat Pump System Data Analysis  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Peer Review Peer Review GSHP System Data Analysis Xiaobing Liu, Ph.D. Oak Ridge National Laboratory liux2@ornl.gov (865-574-2593) 4/3/2013 - GSHP Data Analysis in 1 st phase of U.S.-China CERC-BEE - GSHP ARRA Grantee Data Mining 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: High first cost of ground heat exchangers (GHXs) and lack of knowledge/trust in achievable benefits are major barriers preventing

293

Building America Webinar: Central Multifamily Water Heating Systems...  

Energy Savers (EERE)

Building America Webinar: Central Multifamily Water Heating Systems Building America Webinar: Central Multifamily Water Heating Systems January 21, 2015 3:00PM to 4:30PM EST This...

294

Central Multifamily Water Heating Systems | Department of Energy  

Energy Savers (EERE)

Central Multifamily Water Heating Systems Central Multifamily Water Heating Systems January 21, 2015 3:00PM to 4:30PM EST The Building America Program is hosting a no-cost,...

295

Solar Space Heating with Air and Liquid Systems  

Science Journals Connector (OSTI)

...several thousand solar space heating systems...can be supplied by solar energy delivered from flat-plate...liquid collection and storage systems, demand...Annual costs of solar heating equipment...current values of energy savings, but fuel...

1980-01-01T23:59:59.000Z

296

Building America Webinar: Central Multifamily Water Heating Systems...  

Energy Savers (EERE)

Building America Webinar: Central Multifamily Water Heating Systems Building America Webinar: Central Multifamily Water Heating Systems January 21, 2015 11:00AM to 12:30PM MST...

297

Improving Heating System Operations Using Water Re-Circulation  

E-Print Network (OSTI)

In order to solve the imbalance problem of a heating system, brought about by consumer demand and regulation, and save the electricity energy consumed by a circulation pump, a water mixing and pressure difference control heating system is proposed...

Li, F.; Han, J.

2006-01-01T23:59:59.000Z

298

Everything You Wanted to Know About Solar Water Heating Systems...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Everything You Wanted to Know About Solar Water Heating Systems Everything You Wanted to Know About Solar Water Heating Systems October 7, 2014 - 2:39pm Q&A What do you want to...

299

Case study of underground pipe ground coupled heat pump system  

Science Journals Connector (OSTI)

Aiming to give some advices on the ground coupled heat pump system design in Sichuan Province, China, a typical ground source heat pump (GSHP) system in Sichuan Province was tested in a whole operational year,...

Min Zheng ??; Bai-yi Li ???; Zheng-yong Qiao ???

2012-03-01T23:59:59.000Z

300

Hot Water Heating System Operation and Energy Conservation  

E-Print Network (OSTI)

Based on an example of the reconstruction of a hot water heating system, this paper provides an analysis and comparison of the operations of hot water heating systems, including supply water temperature adjustment, flow adjustment during each...

Shao, Z.; Chen, H.; Wei, P.

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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

Comparison of an impedance heating system to mineral insulated heat trace for power tower applications  

SciTech Connect

A non-conventional type of heating system is being tested at Sandia National Laboratories for solar thermal power tower applications. In this system, called impedance heating, electric current flows directly through the pipe to maintain the desired temperature. The pipe becomes the resistor where the heat is generated. Impedance heating has many advantages over previously used mineral insulated (MI) heat trace. An impedance heating system should be much more reliable than heat trace cable since delicate junctions and cabling are not used and the main component, a transformer, is inherently reliable. A big advantage of impedance heating is the system can be sized to rapidly heat up the piping to provide rapid response times necessary in cyclic power plants such as solar power towers. In this paper, experimental results from testing an impedance heating system are compared to MI heat trace. The authors found impedance heating was able to heat piping rapidly and effectively. There were not significant stray currents and impedance heating did not affect instrumentation.

Pacheco, J.E.; Kolb, W.J.

1997-03-01T23:59:59.000Z

302

Modeling, Estimation, and Control of Waste Heat Recovery Systems  

E-Print Network (OSTI)

141 Open ORC Systemfor Open Organic Rankine Cycle (ORC)138 Evaporatorof an Organic Rankine Cycle (ORC) System for Waste Heat

Luong, David

2013-01-01T23:59:59.000Z

303

[Waste water heat recovery system]. Final report, September 30, 1992  

SciTech Connect

The production capabilities for and field testing of the heat recovery system are described briefly. Drawings are included.

Not Available

1993-04-28T23:59:59.000Z

304

Development of a Computer Heating Monitoring System and Its Applications  

E-Print Network (OSTI)

monitoring system is put into effect in Beijing Institute of Civil Engineering and Architecture (substation heating system) and Beijing Yuxin Residential Area (boiler station heating system). The analysis on testing results is as follows. 3.1 Analysis... Outdoor temp. Time (h) Temp. (?) /Heating load (10 -1 kcal/h) Fig. 2 Changing trends of parameters for substation heating system (Mar. 8, 2000) From Fig. 2 and 3 we can see that the fluctuation of the supply and return water temperatures...

Chen, H.; Li, D.; Shen, L.

2006-01-01T23:59:59.000Z

305

Submersible pumping system with heat transfer mechanism  

DOE Patents (OSTI)

A submersible pumping system for downhole use in extracting fluids containing hydrocarbons from a well. In one embodiment, the pumping system comprises a rotary induction motor, a motor casing, one or more pump stages, and a cooling system. The rotary induction motor rotates a shaft about a longitudinal axis of rotation. The motor casing houses the rotary induction motor such that the rotary induction motor is held in fluid isolation from the fluid being extracted. The pump stages are attached to the shaft outside of the motor casing, and are configured to impart fluid being extracted from the well with an increased pressure. The cooling system is disposed at least partially within the motor casing, and transfers heat generated by operation of the rotary induction motor out of the motor casing.

Hunt, Daniel Francis Alan; Prenger, F. Coyne; Hill, Dallas D; Jankowski, Todd Andrew

2014-04-15T23:59:59.000Z

306

Empire District Electric - Residential Energy Efficiency Rebate |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Empire District Electric - Residential Energy Efficiency Rebate Empire District Electric - Residential Energy Efficiency Rebate Empire District Electric - Residential Energy Efficiency Rebate < Back Eligibility Construction Multi-Family Residential Residential Savings Category Home Weatherization Commercial Weatherization Sealing Your Home Heating & Cooling Commercial Heating & Cooling Cooling Appliances & Electronics Construction Design & Remodeling Other Ventilation Water Heating Windows, Doors, & Skylights Program Info State Missouri Program Type Utility Rebate Program Rebate Amount ENERGY STAR Home Performance Retrofit: 400 ENERGY STAR Qualified Home Designation: 800 Air Conditioner: 400 - 500; varies depending on SEER rating Provider Empire District Electric Company The Empire District Electric Company offers rebates for customers who

307

System Modeling of Gas Engine Driven Heat Pump  

SciTech Connect

To improve the system performance of the GHP, modeling and experimental study has been made by using desiccant system in cooling operation (particularly in high humidity operations) and suction line waste heat recovery to augment heating capacity and efficiency. The performance of overall GHP system has been simulated by using ORNL Modulating Heat Pump Design Software, which is used to predict steady-state heating and cooling performance of variable-speed vapor compression air-to-air heat pumps for a wide range of operational variables. The modeling includes: (1) GHP cycle without any performance improvements (suction liquid heat exchange and heat recovery) as a baseline (both in cooling and heating mode), (2) the GHP cycle in cooling mode with desiccant system regenerated by waste heat from engine incorporated, (3) GHP cycle in heating mode with heat recovery (recovered heat from engine). According to the system modeling results, by using desiccant system regenerated by waste heat from engine, the SHR can be lowered to 40%. The waste heat of the gas engine can boost the space heating efficiency by 25% in rated operating conditions.

Mahderekal, Isaac [Oak Ridge National Laboratory (ORNL)] [Oak Ridge National Laboratory (ORNL); Shen, Bo [ORNL] [ORNL; Vineyard, Edward [Oak Ridge National Laboratory (ORNL)] [Oak Ridge National Laboratory (ORNL)

2012-01-01T23:59:59.000Z

308

Economic Analysis and Comparison of Waste Water Resource Heat Pump Heating and Air-Conditioning System  

E-Print Network (OSTI)

ICEBO2006, Shenzhen, China Renewable Energy Resources and a Greener Future, Vol.VIII-8-1 Economic Analysis and Comparison of Waste Water Resource Heat Pump Heating and Air-conditioning System Chunlei Zhang Suilin Wang Hongbing Chen...

Zhang, C.; Wang, S.; Chen, H.; Shi, Y.

2006-01-01T23:59:59.000Z

309

Integration of biomass into urban energy systems for heat and power. Part I: An MILP based spatial optimization methodology  

Science Journals Connector (OSTI)

Abstract The paper presents a mixed integer linear programming (MILP) approach to optimize multi-biomass and natural gas supply chain strategic design for heat and power generation in urban areas. The focus is on spatial and temporal allocation of biomass supply, storage, processing, transport and energy conversion (heat and CHP) to match the heat demand of residential end users. The main aim lies on the representation of the relationships between the biomass processing and biofuel energy conversion steps, and on the trade-offs between centralized district heating plants and local heat generation systems. After a description of state of the art and research trends in urban energy systems and bioenergy modelling, an application of the methodology to a generic case study is proposed. With the assumed techno-economic parameters, biomass based thermal energy generation results competitive with natural gas, while district heating network results the main option for urban areas with high thermal energy demand density. Potential further applications of this model are also described, together with main barriers for development of bioenergy routes for urban areas.

Antonio M. Pantaleo; Sara Giarola; Ausilio Bauen; Nilay Shah

2014-01-01T23:59:59.000Z

310

Optimization in solar heating/photovoltaic systems. Master's thesis  

SciTech Connect

This thesis is a design of an alternative system which may provide heating to the Naval Postgraduate School swimming pool. Particularly, it is a solar heating/photovoltaic system designed for a better efficiency and less cost of installation and maintenance. Principles of heat transfer, control and fluid dynamics theory are used for the determination of this heating system elements. The feasibility of its installation and use is analyzed.

Vourazelis, D.G.

1990-12-01T23:59:59.000Z

311

Inland Navigation Districts and Florida Inland Navigation District Law  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Inland Navigation Districts and Florida Inland Navigation District Inland Navigation Districts and Florida Inland Navigation District Law (Florida) Inland Navigation Districts and Florida Inland Navigation District Law (Florida) < Back Eligibility Agricultural Commercial Construction Fed. Government Fuel Distributor General Public/Consumer Industrial Installer/Contractor Institutional Investor-Owned Utility Local Government Low-Income Residential Multi-Family Residential Municipal/Public Utility Nonprofit Residential Retail Supplier Rural Electric Cooperative Schools State/Provincial Govt Systems Integrator Transportation Tribal Government Utility Savings Category Water Buying & Making Electricity Home Weatherization Program Info State Florida Program Type Siting and Permitting Provider Florida Inland Navigation District (FIND) The first part of this legislation establishes Inland Navigation Districts,

312

Economic analysis of community solar heating systems that use annual cycle thermal energy storage  

SciTech Connect

The economics of community-scale solar systems that incorporate a centralized annual cycle thermal energy storage (ACTES) coupled to a distribution system is examined. Systems were sized for three housing configurations: single-unit dwellings, 10-unit, and 200-unit apartment complexes in 50-, 200-, 400-, and 1000-unit communities in 10 geographic locations in the United States. Thermal energy is stored in large, constructed, underground tanks. Costs were assigned to each component of every system in order to allow calculation of total costs. Results are presented as normalized system costs per unit of heat delivered per building unit. These methods allow: (1) identification of the relative importance of each system component in the overall cost; and (2) identification of the key variables that determine the optimum sizing of a district solar heating system. In more northerly locations, collectors are a larger component of cost. In southern locations, distribution networks are a larger proportion of total cost. Larger, more compact buildings are, in general, less expensive to heat. For the two smaller-scale building configurations, a broad minima in total costs versus system size is often observed.

Baylin, F.; Monte, R.; Sillman, S.; Hooper, F.C.; McClenahan, J.D.

1981-02-01T23:59:59.000Z

313

STUDY OF FROST GROWTH ON HEAT EXCHANGERS USED AS OUTDOOR COILS IN AIR SOURCE HEAT PUMP SYSTEMS  

E-Print Network (OSTI)

STUDY OF FROST GROWTH ON HEAT EXCHANGERS USED AS OUTDOOR COILS IN AIR SOURCE HEAT PUMP SYSTEMS OF FROST GROWTH ON HEAT EXCHANGERS USED AS OUTDOOR COILS IN AIR SOURCE HEAT PUMP SYSTEMS Dissertation . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 3.5.3 Air Side Heat Transfer Rates . . . . . . . . . . . . . . . . . . 43 3.5.4 Fluid Side Heat

314

Special Property Assessment for Renewable Heating and Cooling Systems |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Special Property Assessment for Renewable Heating and Cooling Special Property Assessment for Renewable Heating and Cooling Systems Special Property Assessment for Renewable Heating and Cooling Systems < Back Eligibility Commercial Industrial Residential Savings Category Heating & Cooling Commercial Heating & Cooling Solar Heating Program Info State Maryland Program Type Property Tax Incentive Rebate Amount Eligible property is assessed at no more than the value of a conventional system Provider Department of Assessments and Taxation Title 8 of Maryland's property tax code includes a state-wide special assessment for solar and geothermal heating and cooling systems. Under this provision, such systems are to be assessed at not more than the value of a conventional system for property tax purposes if no conventional system

315

A new cascade-type heat conversion system  

SciTech Connect

Various heat conversion systems have different operating temperatures. This paper shows how, in a solar energy system some of the waste heat from a thermophotovoltaic arrangement can be made to operate a thermionic power generator. The waste heat of the thermionic power generator can then be made to operate an alkali-metal thermal electric converter, and the waste heat from the alkali-metal thermal electric converter as well as the rest of the waste heat of the thermophotovoltaic system can be made to operate a methane reformation system. Stored heat from the methane reformation system can be made to operate the system at night. The overall system efficiency of the example shown is 42.6%. As a prime source of heat a nuclear pile or burning hydrogen may be used.

Newman, E. [Twenty-First Century Power Co., Northridge, CA (United States)

1996-12-31T23:59:59.000Z

316

Hybrid Geothermal Heat Pump System Research Geothermal Project | Open  

Open Energy Info (EERE)

Hybrid Geothermal Heat Pump System Research Geothermal Project Hybrid Geothermal Heat Pump System Research Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Hybrid Geothermal Heat Pump System Research Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 2: Data Gathering and Analysis Project Description Geothermal, or ground-source heat pump systems have been shown to have superior energy performance to conventional heating and cooling systems in many building types and climates. There has been significant growth in the application of these systems; yet, geothermal systems have only been able to capture a few percent of the heating and cooling market. This is due primarily to the prohibitively high cost of installing the necessary ground loop.

317

California's 5th congressional district: Energy Resources | Open Energy  

Open Energy Info (EERE)

district district 2 Registered Policy Organizations in California's 5th congressional district 3 Registered Energy Companies in California's 5th congressional district 4 Energy Generation Facilities in California's 5th congressional district 5 Utility Companies in California's 5th congressional district US Recovery Act Smart Grid Projects in California's 5th congressional district Sacramento Municipal Utility District Smart Grid Project Registered Policy Organizations in California's 5th congressional district California Energy Commission Registered Energy Companies in California's 5th congressional district Aerojet American Energy Power Systems Inc AEPS Anuvu Inc Ardent Energy Group Inc Atlantis Energy Systems Inc Aztec Solar California State Assembly Clean Energy Systems

318

Thermoeconomic Analysis of a Solar Heat-Pump System  

E-Print Network (OSTI)

This paper introduces a solar energy heat-pump system and analyzes the thermoeconomics. The results show that the solar energy heat-pump system can be operated in different modes and used for room heating in winter and cooling in summer and...

Gao, Y.; Wang, S.

2006-01-01T23:59:59.000Z

319

Combined Heat and Power System Achieves Millions in Cost Savings at Large University- Case Study, 2013  

Energy.gov (U.S. Department of Energy (DOE))

Case study about the CHP system at the Texas A&M district energy campus in College Station, TX funded by the Recovery Act

320

Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems  

E-Print Network (OSTI)

tool for geothermal water loop heat pump systems, 9thInternational IEA Heat Pump Conference, Zürich, Switzerland,Performance of ground source heat pump system in a near-zero

Hong, Tainzhen

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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.


321

CCHP System with Interconnecting Cooling and Heating Network  

E-Print Network (OSTI)

The consistency between building heating load, cooling load and power load are analyzed in this paper. The problem of energy waste and low equipment usage in a traditional CCHP (combined cooling, heating and power) system with generated electricity...

Fu, L.; Geng, K.; Zheng, Z.; Jiang, Y.

2006-01-01T23:59:59.000Z

322

Combined heat recovery and make-up water heating system  

SciTech Connect

A cogeneration plant is described comprising in combination: a first stage source of hot gas; a duct having an inlet for receiving the hot gas and an outlet stack open to the atmosphere; a second stage recovery heat steam generator including an evaporator situated in the duct, and economizer in the duct downstream of the evaporator, and steam drum fluidly connected to the evaporator and the economizer; feedwater supply means including a deaerator heater and feedwater pump for supplying deaerated feedwater to the steam drum through the economizer; makeup water supply means including a makeup pump for delivering makeup water to the deaerator heater; means fluidly connected to the steam drum for supplying auxiliary steam to the deaerator heater; and heat exchanger means located between the deaerator and the economizer, for transferring heat from the feedwater to the makeup water, thereby increasing the temperature of the makeup water delivered to the deaerator and decreasing the temperature of the feedwater delivered to the economizer, without fluid exchange.

Kim, S.Y.

1988-05-24T23:59:59.000Z

323

Heat pump system with selective space cooling  

DOE Patents (OSTI)

A reversible heat pump provides multiple heating and cooling modes and includes a compressor, an evaporator and heat exchanger all interconnected and charged with refrigerant fluid. The heat exchanger includes tanks connected in series to the water supply and a condenser feed line with heat transfer sections connected in counterflow relationship. The heat pump has an accumulator and suction line for the refrigerant fluid upstream of the compressor. Sub-cool transfer tubes associated with the accumulator/suction line reclaim a portion of the heat from the heat exchanger. A reversing valve switches between heating/cooling modes. A first bypass is operative to direct the refrigerant fluid around the sub-cool transfer tubes in the space cooling only mode and during which an expansion valve is utilized upstream of the evaporator/indoor coil. A second bypass is provided around the expansion valve. A programmable microprocessor activates the first bypass in the cooling only mode and deactivates the second bypass, and vice-versa in the multiple heating modes for said heat exchanger. In the heating modes, the evaporator may include an auxiliary outdoor coil for direct supplemental heat dissipation into ambient air. In the multiple heating modes, the condensed refrigerant fluid is regulated by a flow control valve. 4 figs.

Pendergrass, J.C.

1997-05-13T23:59:59.000Z

324

Heat pump system with selective space cooling  

DOE Patents (OSTI)

A reversible heat pump provides multiple heating and cooling modes and includes a compressor, an evaporator and heat exchanger all interconnected and charged with refrigerant fluid. The heat exchanger includes tanks connected in series to the water supply and a condenser feed line with heat transfer sections connected in counterflow relationship. The heat pump has an accumulator and suction line for the refrigerant fluid upstream of the compressor. Sub-cool transfer tubes associated with the accumulator/suction line reclaim a portion of the heat from the heat exchanger. A reversing valve switches between heating/cooling modes. A first bypass is operative to direct the refrigerant fluid around the sub-cool transfer tubes in the space cooling only mode and during which an expansion valve is utilized upstream of the evaporator/indoor coil. A second bypass is provided around the expansion valve. A programmable microprocessor activates the first bypass in the cooling only mode and deactivates the second bypass, and vice-versa in the multiple heating modes for said heat exchanger. In the heating modes, the evaporator may include an auxiliary outdoor coil for direct supplemental heat dissipation into ambient air. In the multiple heating modes, the condensed refrigerant fluid is regulated by a flow control valve.

Pendergrass, Joseph C. (Gainesville, GA)

1997-01-01T23:59:59.000Z

325

Simulation and Validation of a Single Tank Heat Pump Assisted Solar Domestic Water Heating System.  

E-Print Network (OSTI)

??This thesis is a study of an indirect heat pump assisted solar domestic hot water (I-HPASDHW) system, where the investigated configuration is called the Dual… (more)

Wagar, William Robert

2013-01-01T23:59:59.000Z

326

Property Assessed Clean Energy Financing (District of Columbia) |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Property Assessed Clean Energy Financing (District of Columbia) Property Assessed Clean Energy Financing (District of Columbia) Property Assessed Clean Energy Financing (District of Columbia) < Back Eligibility Commercial Industrial Local Government Multi-Family Residential Nonprofit State Government Savings Category Heating & Cooling Commercial Heating & Cooling Heating Home Weatherization Commercial Weatherization Sealing Your Home Cooling Other Design & Remodeling Windows, Doors, & Skylights Construction Manufacturing Heat Pumps Appliances & Electronics Commercial Lighting Lighting Solar Program Info State District of Columbia Program Type PACE Financing Provider District Department of the Environment The District of Columbia offers a commercial Property Assessed Clean Energy (PACE) program. In order to receive financing through the commercial PACE

327

Control valve for solar heating systems  

SciTech Connect

A control valve for a solar heating system is disclosed. The valve has a valve body which defines four chambers disposed end to end. A valve operating rod is movable axially through all four chambers under motor control and carries a valve member for directing liquid through the valve. In one position of the valve member, incoming liquid is directed to an outlet for connection to a solar collector and liquid returning from the collector can flow through the valve body and back to the swimming pool. In the other position of the valve member, the liquid bypasses the collector and is directed back to the pool while liquid in the collector drains back into the valve body through the outlet and is removed by suction from a drain-down chamber in the valve body.

Stewart, J.M.

1981-12-29T23:59:59.000Z

328

Design Considerations for Industrial Heat Recovery Systems  

E-Print Network (OSTI)

in these high-quality waste heat streams, at today's oil prices, is approximately 12 billion dollars per year. Heat recovery is perhaps one of the largest energy conservation opportunities available to U. S. industries today. The author reviews basic heat...

Bywaters, R. P.

1979-01-01T23:59:59.000Z

329

District of Columbia | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

United States » District of Columbia United States » District of Columbia District of Columbia October 16, 2013 Vera Irrigation District #15 - Energy Efficiency Rebate Program 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 appliance recycling. Certain efficiency standards must be met in order to receive a rebate for water heaters or windows. Vera Irrigation District also provides a $450 rebate for the installation of energy-efficient heat pumps; ductless heat pumps are eligible incentives of up to $1,500. See the program web site or contact the utility for more information about this program. October 16, 2013 Underground Storage Tank Management (District of Columbia)

330

Environmentally Friendly Systems: Earth Heat Pump System with Vertical Pipes for Heat Extraction for Domestic Heating and Cooling  

Science Journals Connector (OSTI)

Geothermal heat pumps (GSHPs), or direct expansion (DX) ground source heat pumps, are highly efficient renewable energy technology, ... the earth, groundwater or surface water as heat sources when operating in heating

Saffa Riffat; Siddig Omer; Abdeen Omer

2014-01-01T23:59:59.000Z

331

A PASSIVE SOLAR HEATING SYSTEM COMBINED WITH A HEATPUMP AND A LONG TERM HEAT STORAGE  

Science Journals Connector (OSTI)

ABSTRACT This paper describes the design and the first preliminary performance results of a sunspace attached to an existent building, combined with a heatpump and a long term heat storage. The aim of the project is to study the possibility of storing the excess heat of the passive system in a low temperature storage, which is used as cold source for a heatpump. The advantages of the presented system are that the energy flows in the passive solar system can be controlled and that a rather high solar fraction can be obtained (around .7 to .8 in the climate of Ispra). KEYWORDS Passive solar energy, heat pump, heat storage

D. van Hattem; R. Colombo; P. Actis-Dato

1988-01-01T23:59:59.000Z

332

Siting Your Solar Water Heating System | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Siting Your Solar Water Heating System Siting Your Solar Water Heating System Siting Your Solar Water Heating System May 30, 2012 - 2:46pm Addthis Solar water heaters should be placed facing due south. Solar water heaters should be placed facing due south. Before you buy and install a solar water heating system, you need to first consider your site's solar resource, as well as the optimal orientation and tilt of your solar collector. The efficiency and design of a solar water heating system depends on how much of the sun's energy reaches your building site. Solar water heating systems use both direct and diffuse solar radiation. Even if you don't live in a climate that's warm and sunny most of the time -- like the southwestern United States -- your site still might have an adequate solar resource. If your building site has unshaded areas and

333

Siting Your Solar Water Heating System | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Siting Your Solar Water Heating System Siting Your Solar Water Heating System Siting Your Solar Water Heating System May 30, 2012 - 2:46pm Addthis Solar water heaters should be placed facing due south. Solar water heaters should be placed facing due south. Before you buy and install a solar water heating system, you need to first consider your site's solar resource, as well as the optimal orientation and tilt of your solar collector. The efficiency and design of a solar water heating system depends on how much of the sun's energy reaches your building site. Solar water heating systems use both direct and diffuse solar radiation. Even if you don't live in a climate that's warm and sunny most of the time -- like the southwestern United States -- your site still might have an adequate solar resource. If your building site has unshaded areas and

334

Model Reduction for Power Electronics Systems with Multiple Heat Sources  

E-Print Network (OSTI)

Model Reduction for Power Electronics Systems with Multiple Heat Sources A. Augustin, T. Hauck, B demonstrates the model order re- duction procedures applied to semiconductor devices with multiple heat sources. The approach is demonstrated for a device with nine heat sources where some of them are perma- nently active

Paris-Sud XI, Université de

335

Power systems utilizing the heat of produced formation fluid  

DOE Patents (OSTI)

Systems, methods, and heaters for treating a subsurface formation are described herein. At least one method includes treating a hydrocarbon containing formation. The method may include providing heat to the formation; producing heated fluid from the formation; and generating electricity from at least a portion of the heated fluid using a Kalina cycle.

Lambirth, Gene Richard (Houston, TX)

2011-01-11T23:59:59.000Z

336

Chemical heat pump and chemical energy storage system  

DOE Patents (OSTI)

A chemical heat pump and storage system employs sulfuric acid and water. In one form, the system includes a generator and condenser, an evaporator and absorber, aqueous acid solution storage and water storage. During a charging cycle, heat is provided to the generator from a heat source to concentrate the acid solution while heat is removed from the condenser to condense the water vapor produced in the generator. Water is then stored in the storage tank. Heat is thus stored in the form of chemical energy in the concentrated acid. The heat removed from the water vapor can be supplied to a heat load of proper temperature or can be rejected. During a discharge cycle, water in the evaporator is supplied with heat to generate water vapor, which is transmitted to the absorber where it is condensed and absorbed into the concentrated acid. Both heats of dilution and condensation of water are removed from the thus diluted acid. During the discharge cycle the system functions as a heat pump in which heat is added to the system at a low temperature and removed from the system at a high temperature. The diluted acid is stored in an acid storage tank or is routed directly to the generator for reconcentration. The generator, condenser, evaporator, and absorber all are operated under pressure conditions specified by the desired temperature levels for a given application. The storage tanks, however, can be maintained at or near ambient pressure conditions. In another form, the heat pump system is employed to provide usable heat from waste process heat by upgrading the temperature of the waste heat.

Clark, Edward C. (Woodinville, WA); Huxtable, Douglas D. (Bothell, WA)

1985-08-06T23:59:59.000Z

337

Thaw flow control for liquid heat transport systems  

DOE Patents (OSTI)

In a liquid metal heat transport system including a source of thaw heat for use in a space reactor power system, the thaw flow throttle or control comprises a fluid passage having forward and reverse flow sections and a partition having a plurality of bleed holes therein to enable fluid flow between the forward and reverse sections. The flow throttle is positioned in the system relatively far from the source of thaw heat.

Kirpich, Aaron S. (Broomall, PA)

1989-01-01T23:59:59.000Z

338

Optimization of Advanced Ground-Coupled Heat Pump Systems A heat pump is a technology in which heating and cooling are provided by a single piece of equipment.  

E-Print Network (OSTI)

Optimization of Advanced Ground-Coupled Heat Pump Systems A heat pump is a technology in which heating and cooling are provided by a single piece of equipment. In a Ground Coupled Heat Pump (GCHP) system a length of pipe is buried in the ground and the ground acts as a reservoir to store the heat

Wisconsin at Madison, University of

339

Analyzing the efficiency of a heat pump assisted drain water heat recovery system that uses a vertical inline heat exchanger  

Science Journals Connector (OSTI)

Abstract The purpose of the present study is to accumulate knowledge on how a drain water heat recovery system using a vertical inline heat exchanger and a heat pump performs under different drain water flow profile scenarios. Investigating how the intermittent behavior of the drain water influences the performance for this type of system is important because it gives insight on how the system will perform in a real life situation. The scenarios investigated are two 24 h drain water flow rate schedules and one shorter schedule representing a three minute shower. The results from the present paper add to the knowledge on how this type of heat recovery system performs in a setting similar to a multi-family building and how sizing influences the performance. The investigation shows that a heat recovery system of this type has the possibility to recover a large portion of the available heat if it has been sized to match the drain water profile. Sizing of the heat pump is important for the system performance; sizing of the storage tank is also important but not as critical.

Jörgen Wallin; Joachim Claesson

2014-01-01T23:59:59.000Z

340

Experimental Measurement of Radiation Heat Transfer from Complex Fenestration Systems.  

E-Print Network (OSTI)

??A well instrumented facility for the measurement of heat transfer from complex fenestration systems was built and validated. The facility provided very accurate measurements based… (more)

Wilson, Barry Allan

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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

Trimming of a ground source heat pump system in Saltsjöbaden.  

E-Print Network (OSTI)

?? The real performance of ground source heat pumps systems are not precisely highlighted in most cases, especially when it comes to installations older than… (more)

Garnier, Michel

2014-01-01T23:59:59.000Z

342

Solar pool heating system: An olympic-sized effort  

SciTech Connect

This article describes design and building of the Georgia Tech Aquatic Center Heliocol solar pool heating system, developed for the 1996 Olympics in Atlanta.

Sheinkopf, K.

1996-07-01T23:59:59.000Z

343

Combined Heat and Power System Achieves Millions in Cost Savings...  

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

campus, which includes 750 buildings. Photo courtesy of Texas A&M University Combined Heat and Power System Achieves Millions in Cost Savings at Large University Recovery Act...

344

New Advanced System Utilizes Industrial Waste Heat to Power Water...  

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

Water Reuse ADVANCED MANUFACTURING OFFICE New Advanced System Utilizes Industrial Waste Heat to Power Water Purification Introduction As population growth and associated factors...

345

Combined Heat and Power System Enables 100% Reliability at Leading...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Enables 100% Reliability at Leading Medical Campus - Case Study, 2013 Combined Heat and Power System Enables 100% Reliability at Leading Medical Campus - Case Study, 2013 Thermal...

346

Combined Heat and Power System Achieves Millions in Cost Savings...  

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

Achieves Millions in Cost Savings at Large University - Case Study, 2013 Combined Heat and Power System Achieves Millions in Cost Savings at Large University - Case Study, 2013...

347

Combined Heat and Power System Enables 100% Reliability at Leading...  

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

buildings on nearly 1,000 acres. Photo courtesy of Thermal Energy Corporation Combined Heat and Power System Enables 100% Reliability at Leading Medical Campus Recovery Act...

348

Flathead Electric Cooperative Facility Geothermal Heat Pump System...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Cooperative is uniquely positioned to provide marketing of ground source heat pump systems * 15' Static Water Level * Low Pumping Power * Reduced Installation Costs * Good...

349

Modeling, Estimation, and Control of Waste Heat Recovery Systems  

E-Print Network (OSTI)

for Open Organic Rankine Cycle (ORC)138 Evaporatorand Simulation of an Organic Rankine Cycle (ORC) System forControl of Organic Rankine Cycles in Waste Heat Uti- lizing

Luong, David

2013-01-01T23:59:59.000Z

350

Save Energy Now in Your Process Heating Systems  

SciTech Connect

This DOE Industrial Technologies Program fact sheet describes how manufacturing plants can save energy and money by making energy efficiency improvements to their industrial process heating systems.

Not Available

2006-01-01T23:59:59.000Z

351

Save Energy Now in Your Process Heating Systems  

Energy.gov (U.S. Department of Energy (DOE))

This fact sheet describes how manufacturing plants can save energy and money by making energy efficiency improvements to their industrial process heating systems.

352

Heat recovery and the economizer for HVAC systems  

SciTech Connect

This articles examines why a combined heat reclaim/economizer system with priority to heat reclaim operation is most likely to result in the least annual total HVAC energy. PC-based, hour-by-hour simulation programs evaluate annual HVAC energy requirements when using combined operation of heat reclaim and economizer cycle, while giving priority to operation of either one. These simulation programs also enable the design engineer to select the most viable heat reclaim and/or economizer system for any given type of HVAC system serving the building internal load level, building geographical location and other building/system variables.

Anantapantula, V.S. (Emerson Electric Co., St. Louis, MO (United States). Alco Controls Div.); Sauer, H.J. Jr. (Univ. of Missouri, Rolla, MO (United States))

1994-11-01T23:59:59.000Z

353

Building America Webinar: Central Multifamily Water Heating Systems  

Energy.gov (U.S. Department of Energy (DOE))

This U.S. Department of Energy Building America webinar, Central Multifamily Water Heating Systems, will take place on January 21, 2015.

354

Method of measuring heat influx of a cryogenic transfer system  

DOE Patents (OSTI)

A method is provided for measuring the heat influx of a cryogenic transfer system. A gaseous phase of the cryogen used during normal operation of the system is passed through the system. The gaseous cryogen at the inlet to the system is tempered to duplicate the normal operating temperature of the system inlet. The temperature and mass flow rate of the gaseous cryogen is measured at the outlet of the system, and the heat capacity of the cryogen is determined. The heat influx of the system is then determined from known thermodynamic relationships.

Niemann, Ralph C. (Downers Grove, IL); Zelipsky, Steven A. (Tinley Park, IL); Rezmer, Ronald R. (Lisle, IL); Smelser, Peter (Bruner, MO)

1981-01-01T23:59:59.000Z

355

Heating and Cooling System Support Equipment Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Heating and Cooling System Support Equipment Basics Heating and Cooling System Support Equipment Basics Heating and Cooling System Support Equipment Basics July 30, 2013 - 3:28pm Addthis Thermostats and ducts provide opportunities for saving energy. Dehumidifying heat pipes provide a way to help central air conditioners and heat pumps dehumidify air. Electric and gas meters allow users to track energy use. Thermostats Programmable thermostats can store and repeat multiple daily settings. Users can adjust the times heating or air-conditioning is activated according to a pre-set schedule. Visit the Energy Saver website for more information about thermostats and control systems in homes. Ducts Efficient and well-designed duct systems distribute air properly throughout a building, without leaking, to keep all rooms at a comfortable

356

Results of primary central nervous system lymphoma treated by radiation and chemotherapy: Retrospective analysis of twelve institutions in the Tokai district of Japan, 1995–1999  

Science Journals Connector (OSTI)

We analyzed the therapeutic results and prognostic factors of 46 primary central nervous system lymphoma (PCNSL) patients who were treated at twelve institutions in the Tokai district of Japan between 1995 and...

Toshiki Kawamura M.D.; Tsuneo Ishiguchi; Yuta Shibamoto…

2006-01-01T23:59:59.000Z

357

Distributed Energy Systems in California's Future: A Preliminary Report Volume 2  

E-Print Network (OSTI)

apparatus for geothermal district heating. In geothermalair con~ District heating \\dth geothermal energy shouldDistrict Solar Heating Biomass Conversion Wind Cogeneration and Solar Thermal Hydroelectric Power Geothermal

Balderston, F.

2010-01-01T23:59:59.000Z

358

Local Option - Special Districts | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Local Option - Special Districts Local Option - Special Districts Local Option - Special Districts < Back Eligibility Commercial Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heating Home Weatherization Commercial Weatherization Cooling Sealing Your Home Ventilation Construction Heat Pumps Appliances & Electronics Commercial Lighting Lighting Windows, Doors, & Skylights Bioenergy Solar Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Heating Wind Program Info State Florida Program Type PACE Financing '''''Note: The Federal Housing Financing Agency (FHFA) issued a [http://www.fhfa.gov/webfiles/15884/PACESTMT7610.pdf statement] in July 2010 concerning the senior lien status associated with most PACE programs. In response to the FHFA statement, most local PACE programs have been

359

The impact of downsizing on student achievement as reported in the academic excellence indicator system in North East Independent School District in San Antonio, Texas  

E-Print Network (OSTI)

THE IMPACT OF DOWNSIZING ON STUDENT ACHIEVEMENT AS REPORTED IN THE ACADEMIC EXCELLENCE INDICATOR SYSTEM IN NORTH EAST INDEPENDENT SCHOOL DISTRICT IN SAN ANTONIO, TEXAS A Record of Study by DONNA MILLER NEWMAN... THE IMPACT OF DOWNSIZING ON STUDENT ACHIEVEMENT AS REPORTED IN THE ACADEMIC EXCELLENCE INDICATOR SYSTEM IN NORTH EAST INDEPENDENT SCHOOL DISTRICT IN SAN ANTONIO, TEXAS A Record of Study by DONNA MILLER NEWMAN Submitted...

Newman, Donna M

2008-10-10T23:59:59.000Z

360

A ground-coupled storage heat pump system with waste heat recovery  

SciTech Connect

This paper reports on an experimental single-family residence that was constructed to demonstrate integration of waste heat recovery and seasonal energy storage using both a ventilating and a ground-coupled heat pump. Called the Idaho energy Conservation Technology House, it combines superinsulated home construction with a ventilating hot water heater and a ground coupled water-to-water heat pump system. The ground heat exchangers are designed to economically promote seasonal and waste heat storage. Construction of the house was completed in the spring of 1989. Located in Moscow, Idaho, the house is occupied by a family of three. The 3,500 ft{sup 2} (325 m{sup 2}) two-story house combines several unique sub-systems that all interact to minimize energy consumption for space heating and cooling, and domestic hot water.

Drown, D.C.; Braven, K.R.D. (Univ. of Idaho, ID (US)); Kast, T.P. (Thermal Dynamic Towers, Boulder, CO (US))

1992-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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

Underground Mine Water Heating and Cooling Using Geothermal Heat Pump Systems  

SciTech Connect

In many regions of the world, flooded mines are a potentially cost-effective option for heating and cooling using geothermal heat pump systems. For example, a single coal seam in Pennsylvania, West Virginia, and Ohio contains 5.1 x 1012 L of water. The growing volume of water discharging from this one coal seam totals 380,000 L/min, which could theoretically heat and cool 20,000 homes. Using the water stored in the mines would conservatively extend this option to an order of magnitude more sites. Based on current energy prices, geothermal heat pump systems using mine water could reduce annual costs for heating by 67% and cooling by 50% over conventional methods (natural gas or heating oil and standard air conditioning).

Watzlaf, G.R.; Ackman, T.E.

2006-03-01T23:59:59.000Z

362

Tips: Natural Gas and Oil Heating Systems | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Natural Gas and Oil Heating Systems Natural Gas and Oil Heating Systems Tips: Natural Gas and Oil Heating Systems May 30, 2012 - 5:41pm Addthis Install a new energy-efficient furnace to save money over the long term. Install a new energy-efficient furnace to save money over the long term. If you plan to buy a new heating system, ask your local utility or state energy office about the latest technologies on the market. For example, many newer models have designs for burners and heat exchangers that are more efficient during operation and cut heat loss when the equipment is off. Consider a sealed-combustion furnace -- they are safer and more efficient. Long-Term Savings Tip Install a new energy-efficient furnace to save money over the long term. Look for the ENERGY STAR® and EnergyGuide labels to compare efficiency and

363

Microsoft Word - district_of_columbia.doc  

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

District of Columbia District of Columbia NERC Region(s) ....................................................................................................... RFC Primary Energy Source........................................................................................... Petroleum Net Summer Capacity (megawatts) ....................................................................... 790 51 Independent Power Producers & Combined Heat and Power ................................ 790 46 Net Generation (megawatthours) ........................................................................... 199,858 51 Independent Power Producers & Combined Heat and Power ................................ 199,858 51 Emissions (thousand metric tons) ..........................................................................

364

Microsoft Word - district_of_columbia.doc  

Gasoline and Diesel Fuel Update (EIA)

District of Columbia District of Columbia NERC Region(s) ....................................................................................................... RFC Primary Energy Source........................................................................................... Petroleum Net Summer Capacity (megawatts) ....................................................................... 790 51 Independent Power Producers & Combined Heat and Power ................................ 790 46 Net Generation (megawatthours) ........................................................................... 199,858 51 Independent Power Producers & Combined Heat and Power ................................ 199,858 51 Emissions (thousand metric tons) ..........................................................................

365

AMBIPOLAR DIFFUSION HEATING IN TURBULENT SYSTEMS  

SciTech Connect

The temperature of the gas in molecular clouds is a key determinant of the characteristic mass of star formation. Ambipolar diffusion (AD) is considered one of the most important heating mechanisms in weakly ionized molecular clouds. In this work, we study the AD heating rate using two-fluid turbulence simulations and compare it with the overall heating rate due to turbulent dissipation. We find that for observed molecular clouds, which typically have Alfven Mach numbers of {approx}1 and AD Reynolds numbers of {approx}20, about 70% of the total turbulent dissipation is in the form of AD heating. AD has an important effect on the length scale where energy is dissipated: when AD heating is strong, most of the energy in the cascade is removed by ion-neutral drift, with a comparatively small amount of energy making it down to small scales. We derive a relation for the AD heating rate that describes the results of our simulations to within a factor of two. Turbulent dissipation, including AD heating, is generally less important than cosmic-ray heating in molecular clouds, although there is substantial scatter in both.

Li, Pak Shing [Astronomy Department, University of California, Berkeley, CA 94720 (United States); Myers, Andrew [Physics Department, University of California, Berkeley, CA 94720 (United States); McKee, Christopher F., E-mail: psli@astron.berkeley.edu, E-mail: atmyers@berkeley.edu, E-mail: cmckee@berkeley.edu [Physics Department and Astronomy Department, University of California, Berkeley, CA 94720 (United States)

2012-11-20T23:59:59.000Z

366

Heat energy Q: -energy exchanged between systems if they have a different temperature  

E-Print Network (OSTI)

About heat Heat energy Q: - energy exchanged between systems if they have a different temperature - heat flows from higher to lower temperature - without temperature difference, no heat is exchanged If a system is receiving or releasing heat, then this heat is called a) Sensible heat, if the system changes

Boyd, Sylke

367

Empire District Electric - Commercial and Industrial Energy Efficiency  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Empire District Electric - Commercial and Industrial Energy Empire District Electric - Commercial and Industrial Energy Efficiency Rebates Empire District Electric - Commercial and Industrial Energy Efficiency Rebates < Back Eligibility Commercial Industrial Savings Category Heating & Cooling Commercial Heating & Cooling Cooling Other Appliances & Electronics Commercial Lighting Lighting Manufacturing Maximum Rebate 5,000; additional funds may be available for final 3 months of program year Program Info State Arkansas Program Type Utility Rebate Program Rebate Amount Custom: lesser of $.30 per kWh savings, 50% of incremental cost, or buydown to two year payback Fluorescent Lamps/Fixtures: $0.50 - $16 High Performance T8 Systems: $9 - $18 High-Bay Fluorescent Lamps/Ballasts: $40 - $125 CFL Fixtures: $8 - $25 Pendant/Wall Mount/Recessed Indirect Fixtures: $16 - $24

368

Solar Assisted Heat Pump Systems with Ground Heat Exchanger – Simulation Studies  

Science Journals Connector (OSTI)

Abstract Different concepts of solar assisted heat pump systems with ground heat exchanger are simulated according to IEA SHC Task44/HPP Annex38 reference conditions. Two aspects of the concepts are investigated using TRNSYS simulations. First, the solar impact on system efficiency is assessed by the seasonal performance factor. Second, the solar impact on the possible shortening of the ground heat exchanger is evaluated by the minimum temperature at the ground heat exchanger inlet. The simulation results reveal diverging optimums for the concepts. The direct use of solar energy clearly achieves the best effect on the efficiency improvement. A simple domestic hot water system reaches a seasonal performance factor of 4.5 and solar combi-systems seasonal performance factors up to 6. In contrast, the use of solar energy on the cold side of the heat pump achieves the best effects on the shortening of the ground heat exchanger of up to 20%. Two highly sensitive influences are investigated with the developed transient system model. First, the minimum allowed heat source temperature is varied. Here 1 K equals a variation of 0.25 in the seasonal performance or of around 10% ground heat exchanger length. Second, the ground heat exchanger model is simulated without and with a pre-pipe that improves the transient model behavior. The influence of this pre-pipe on the SPF is small for conventionally designed ground heat exchangers, but of around 2 K for the minimum inlet temperature. Therefore, the dynamic model quality reveals potential to reduce the size of the ground heat exchanger corresponding to investment costs.

Erik Bertram

2014-01-01T23:59:59.000Z

369

Maintenance Guide for Greenhouse Ventilation, Evaporative Cooling Heating Systems1  

E-Print Network (OSTI)

condensation in winter, reduced life and reliability of ventilation equipment, and high repair bills cooling and heating systems. VENTILATION SYSTEMS The operating efficiency of a ventilation fan can be pockets of stagnant air, inadequate cooling from evaporative cooling pads, high heating expenses, heavy

Watson, Craig A.

370

Thermal Solar Energy Systems for Space Heating of Buildings  

E-Print Network (OSTI)

to compensate the deficit. In this case a traditional solar heating system having the same characteristics with regard to the solar collecting area and the volume of storage tank is used. It can be concluded that the space heating system using a solar energy...

Gomri, R.; Boulkamh, M.

2010-01-01T23:59:59.000Z

371

RTO heat recovery system decreases production costs and provides payback  

SciTech Connect

Application of a heat recovery system to an existing regenerative thermal oxidizer (RTO) was considered, tested, and selected for decreasing production costs at a pressure sensitive tape manufacturing facility. Heat recovery systems on RTO's are less common than those on other thermal oxidizers (e.g., recuperative) because RTO's, by the nature of the technology, usually provide high thermal efficiencies (without the application of external heat recovery systems). In this case, the production processes were integrated with the emission controls by applying an external heat recovery system and by optimizing the design and operation of the existing drying and cure ovens, RTO system, and ductwork collection system. Integration of these systems provides an estimated annual production cost savings of over $400,000 and a simplified capital investment payback of less than 2 years, excluding possible savings from improved dryer operations. These additional process benefits include more consistent and simplified control of seasonal dryer performance and possibly production throughput increases. The production costs savings are realized by substituting excess RTO heat for a portion of the infrared (IR) electrical heat input to the dryers/ovens. This will be accomplished by preheating the supply air to the oven zones with the excess RTO heat (i.e., heat at the RTO exceeding auto-thermal conditions). Several technologies, including direct air-to-air, indirect air-to-air, hot oil-to-air, waste heat boiler (steam-to-air) were evaluated for transferring the excess RTO heat (hot gas) to the ovens. A waste heat boiler was selected to transfer the excess RTO heat to the ovens because this technology provided the most economical, reliable, and feasible operation. Full-scale production test trials on the coating lines were performed and confirmed the IR electrical costs could be reduced up to 70%.

Lundquist, P.R.

1999-07-01T23:59:59.000Z

372

Heat efficiency of “translucent cover-radiation absorbing heat-exchange panel” system of flat solar collectors  

Science Journals Connector (OSTI)

An analytic expression is proposed for determining the heat efficiency of the “translucent cover-radiation absorbing heat-exchange panel” system of flat solar collectors, and on its base the heat efficiency of th...

R. R. Avezov; N. R. Avezova

2008-09-01T23:59:59.000Z

373

Experimental study on heat transfer characteristics of internal heat exchangers for CO2 system under cooling condition  

Science Journals Connector (OSTI)

This paper presents the heat transfer characteristics of the internal heat exchanger (IHX) for CO2 heat pump system. The influence on the IHX length, the mass flow rate, the shape of IHX, the operating condition,...

Young Chul Kwon; Dae Hoon Kim; Jae Heon Lee…

2009-03-01T23:59:59.000Z

374

Discussions on Disposal Forms of Auxiliary Heat Source in Surface Water Heat Pump System  

E-Print Network (OSTI)

This paper presents two common forms of auxiliary heat source in surface water heat pump system and puts forward the idea that the disposal forms affect operation cost. It deduces operation cost per hour of the two forms. With a project...

Qian, J.; Sun, D.; Li, X.; Li, G.

2006-01-01T23:59:59.000Z

375

Field application of a chemical heat and nitrogen generating system  

SciTech Connect

Heat is often required to stimulate production in wells with recurrent histories of paraffin deposition and plugging. A chemical system which produces heat and nitrogen at a predetermined well depth is proposed as an alternative to the traditional hot oil and steam generation treatments. The system is described briefly and case histories are given for 3 wells in California and 5 wells in Wyoming. The field results indicate that heat produced by the nitrogen generating system effectively stimulates production from paraffin plugged wells. The heat and nitrogen generating system further shows increased production cycle lengths over those which result from hot oil or paraffin solvent treatments. Beneficial effects of including a paraffin inhibitor in the treatment design are discussed, along with other potential applications for the heat produced by this system.

Mitchell, T.I.; Collesi, J.B.; Donovan, S.C.; McSpadden, H.W.

1984-04-01T23:59:59.000Z

376

Northeast Home Heating Oil Reserve - Online Bidding System | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Services » Petroleum Reserves » Heating Oil Reserve » Northeast Services » Petroleum Reserves » Heating Oil Reserve » Northeast Home Heating Oil Reserve - Online Bidding System Northeast Home Heating Oil Reserve - Online Bidding System The U.S. Department of Energy has developed an on-line bidding system - an anonymous auction program - for the sale of product from the one million barrel Northeast Home Heating Oil Reserve. We invite prospective bidders and other interested parties to try out this system and give us your views. You must register to use the system to practice or to participate in an actual emergency sale. Registration assures that you will receive e-mail alerts of sales or other pertinent news. You will also have the opportunity to establish a user ID and password to submit bids. If you establish a user ID, you will receive a temporary password by

377

Combined permeable pavement and ground source heat pump systems   

E-Print Network (OSTI)

The PhD thesis focuses on the performance assessment of permeable pavement systems incorporating ground source heat pumps (GSHP). The relatively high variability of temperature in these systems allows for the survival of pathogenic organisms within...

Grabowiecki, Piotr

2010-01-01T23:59:59.000Z

378

Designing Optimal Heat and Power Systems for Industrial Processes  

E-Print Network (OSTI)

Industrial heat and power systems are complex and not fully understood as integrated systems. Within the context of the overall manufacturing process, they represent enormous capital investments and substantially contribute to the total operating...

Rutkowski, M. A.; Witherell, W. D.

379

Experimental Research of an Active Solar Heating System  

E-Print Network (OSTI)

system are discussed in this paper. Based on the design, construction, testing and economic analysis of a demonstration project with the solar heating system, this paper discusses how to connect the solar energy collector with the electricity heater...

Gao, X.; Li, D.

2006-01-01T23:59:59.000Z

380

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

Note: This page contains sample records for the topic "district heating system" 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

E-Print Network 3.0 - arc geothermal systems Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

for the Next 50 Years," EPRI ER-611-SR, Palo Alto, Ca.. ESRI: Using Arc... Utilized For District Heating Systems in Turkey," New Zealand ... Source: Stanford University -...

382

E-Print Network 3.0 - advanced steam systems Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Conference Summary: recovery. As stable steam supply to the paper mill and the district heating system needs to be assured... conditions. In second instance, the control...

383

E-Print Network 3.0 - applying energy system Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Mathematics 4 California Energy Commission "Our District now has a heightened Summary: , heating and cooling systems, and more? Look at the benefits of our Energy Efficiency Loan...

384

E-Print Network 3.0 - active geothermal systems Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

February 1-3, 2010 Summary: of geothermal energy in Turkey has focused mainly on district heating. The first of these systems came on line... , solar, etc. Geological...

385

Distributed Energy Systems in California's Future: A Preliminary Report Volume 2  

E-Print Network (OSTI)

District Solar Heating Biomass Conversion Wind CogenerationEnergy Systems Biomass Conversion . Neighborhood Housingplan. lL2. 3 Biomass Conversion Biomass conversion or the

Balderston, F.

2010-01-01T23:59:59.000Z

386

Building Codes and Regulations for Solar Water Heating Systems | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Building Codes and Regulations for Solar Water Heating Systems Building Codes and Regulations for Solar Water Heating Systems Building Codes and Regulations for Solar Water Heating Systems June 24, 2012 - 1:50pm Addthis Photo Credit: iStockphoto Photo Credit: iStockphoto Before installing a solar water heating system, you should investigate local building codes, zoning ordinances, and subdivision covenants, as well as any special regulations pertaining to the site. You will probably need a building permit to install a solar energy system onto an existing building. Not every community or municipality initially welcomes residential renewable energy installations. Although this is often due to ignorance or the comparative novelty of renewable energy systems, you must comply with existing building and permit procedures to install your system.

387

Building Codes and Regulations for Solar Water Heating Systems | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Building Codes and Regulations for Solar Water Heating Systems Building Codes and Regulations for Solar Water Heating Systems Building Codes and Regulations for Solar Water Heating Systems June 24, 2012 - 1:50pm Addthis Photo Credit: iStockphoto Photo Credit: iStockphoto Before installing a solar water heating system, you should investigate local building codes, zoning ordinances, and subdivision covenants, as well as any special regulations pertaining to the site. You will probably need a building permit to install a solar energy system onto an existing building. Not every community or municipality initially welcomes residential renewable energy installations. Although this is often due to ignorance or the comparative novelty of renewable energy systems, you must comply with existing building and permit procedures to install your system.

388

Empire District Electric - Low Income New Homes Program | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Empire District Electric - Low Income New Homes Program Empire District Electric - Low Income New Homes Program Empire District Electric - Low Income New Homes Program < Back Eligibility Construction Low-Income Residential Savings Category Home Weatherization Commercial Weatherization Heating & Cooling Commercial Heating & Cooling Cooling Heat Pumps Appliances & Electronics Commercial Lighting Lighting Maximum Rebate Total: $1,100 Program Info State Missouri Program Type Utility Rebate Program Rebate Amount Insulation: full incremental cost above the appropriate baseline Heat Pumps: $400 Central AC: $400 Refrigerator: $200 Lighting: $100 Provider Empire District Electric Empire District Electric offers rebates for the utilization of energy efficient measures and appliances in new, low-income homes. Rebates are

389

Business Energy Rebate Program (District of Columbia) | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Business Energy Rebate Program (District of Columbia) Business Energy Rebate Program (District of Columbia) Business Energy Rebate Program (District of Columbia) < Back Eligibility Commercial Institutional Savings Category Heating & Cooling Commercial Heating & Cooling Heating Cooling Manufacturing Heat Pumps Appliances & Electronics Commercial Lighting Lighting Other Program Info Funding Source Sustainable Energy Trust Fund Start Date 05/01/2012 State District of Columbia Program Type State Rebate Program Rebate Amount Varies by equipment type and amount purchased Provider Business Energy Rebate Program The District of Columbia's Sustainable Energy Utility (SEU) administers the Business Energy Rebate Program. Rebates are available to businesses and institutions for the installation of energy-efficient equipment. Only new

390

Property:Distributed Generation System Heating-Cooling Application | Open  

Open Energy Info (EERE)

Heating-Cooling Application Heating-Cooling Application Jump to: navigation, search This is a property of type Page. Pages using the property "Distributed Generation System Heating-Cooling Application" Showing 21 pages using this property. D Distributed Generation Study/10 West 66th Street Corp + Domestic Hot Water +, Space Heat and/or Cooling + Distributed Generation Study/Aisin Seiki G60 at Hooligans Bar and Grille + Domestic Hot Water + Distributed Generation Study/Arrow Linen + Domestic Hot Water + Distributed Generation Study/Dakota Station (Minnegasco) + Space Heat and/or Cooling +, Other + Distributed Generation Study/Elgin Community College + Space Heat and/or Cooling +, Domestic Hot Water + Distributed Generation Study/Emerling Farm + Domestic Hot Water +, Process Heat and/or Cooling +

391

Preliminary Analysis of a Solar Heat Pump System with Seasonal Storage for Heating and Cooling  

E-Print Network (OSTI)

and cooling were set up, which is responsible for the space heating and cooling and domestic hot water for a residential block. Through hourly simulation, the performance and the economics of such systems were analyzed, for the different tank volumes...

Yu, G.; Chen, P.; Dalenback, J.

2006-01-01T23:59:59.000Z

392

Experience with solar systems for heating swimming pools in Germany  

SciTech Connect

The results of the demonstration programme [open quotes]Efficient Use of Energy in Swimming Pool Construction[close quotes] has had a positive effect on the dissipation of solar systems for swimming pools. Infrared measurements show how a homogeneous flow can be achieved in the absorber field. The fact that solar systems are acceptable can be clearly in evidence that the behaviour of visitors to purely solar-heated pools with variable water temperature does not differ in principle from conventionally-heated pools with constant temperature. Economic considerations of the operation show that swimming pool solar systems are competitive with conventional heating systems.

Croy, R.; Peuser, F.A. (Zentralstelle fuer Solartechnik, Hilden (Germany))

1994-07-01T23:59:59.000Z

393

Flathead Electric Cooperative Facility Geothermal Heat Pump System Upgrade  

SciTech Connect

High initial cost and lack of public awareness of ground source heat pump (GSHP) technology are the two major barriers preventing rapid deployment of this energy saving technology in the United States. Under the American Recovery and Reinvestment Act (ARRA), 26 GSHP projects have been competitively selected and carried out to demonstrate the benefits of GSHP systems and innovative technologies for cost reduction and/or performance improvement. This paper highlights findings of a case study of one of the ARRA-funded GSHP demonstration projects, which is a heating only central GSHP system using shallow aquifer as heat source and installed at a warehouse and truck bay at Kalispell, MT. This case study is based on the analysis of measured performance data, utility bills, and calculations of energy consumptions of conventional central heating systems for providing the same heat outputs as the central GSHP system did. The evaluated performance metrics include energy efficiency of the heat pump equipment and the overall GSHP system, pumping performance, energy savings, carbon emission reductions, and cost-effectiveness of GSHP system compared with conventional heating systems. This case study also identified areas for reducing uncertainties in performance evaluation, improving operational efficiency, and reducing installed cost of similar GSHP systems in the future. Publication of ASHRAE at the annual conference in Seattle.

Liu, Xiaobing [Oak Ridge National Lab] [Oak Ridge National Lab

2014-06-01T23:59:59.000Z

394

Colorado's 6th congressional district: Energy Resources | Open...  

Open Energy Info (EERE)

Colorado. Registered Research Institutions in Colorado's 6th congressional district ITN Energy Systems, Inc. Registered Energy Companies in Colorado's 6th congressional district...

395

E-Print Network 3.0 - additional heating systems Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

HEAT ENGINE ANALYSIS Summary: on overall system performance. Along with the addition of a heat loss term to the surroundings, the general... -reversible heat engine model is...

396

ITER have a need for ion cyclotron heating (ICH) as part of the plasma heating system mix to reach the  

E-Print Network (OSTI)

Background ITER have a need for ion cyclotron heating (ICH) as part of the plasma heating system ITER ion cyclotron heating systems design Section view through antenna module Thermal model of antenna The ion cyclotron heating antenna is currently in its preliminary design phase and is undergoing detailed

397

Heating and cooling performance analysis of a ground source heat pump system in Southern Germany  

Science Journals Connector (OSTI)

Abstract This paper examines thermal performance of a ground source heat pump (GSHP) system. The GSHP system was installed in an office building in Nuremberg city of Germany. In order to evaluate system performance the GSHP system has been continuously monitored for 4 years. Heating and cooling performance of the GSHP system is analyzed based on the accumulated data. Major findings of this work include: (1) coefficient of performance (COP) is estimated to be 3.9 for a typical winter day and energy efficiency ratio (EER) is assessed to be 8.0 for a typical summer day. These results indicate that the GSHP system has a higher efficiency for building cooling than building heating. (2) For a long-term period, the seasonal energy efficiency ratio (SEER) of the GSHP system is observed to increase by 8.7% annually, whereas the seasonal COP is decreased by 4.0% over a 4-year period. The heating and cooling performance of the GSHP system migrates in opposite trend is caused by the unevenly distributed heating and cooling load of the building. This phenomenon deserves serious attention in the design of future GSHP systems in order to avoid the reducing of energy efficiency over long-term operation.

Jin Luo; Joachim Rohn; Manfred Bayer; Anna Priess; Lucas Wilkmann; Wei Xiang

2015-01-01T23:59:59.000Z

398

Massachusetts's 8th congressional district: Energy Resources | Open Energy  

Open Energy Info (EERE)

Massachusetts's 8th congressional district: Energy Resources Massachusetts's 8th congressional district: Energy Resources Jump to: navigation, search Equivalent URI DBpedia This article is a stub. You can help OpenEI by expanding it. This page represents a congressional district in Massachusetts. Contents 1 Registered Research Institutions in Massachusetts's 8th congressional district 2 Registered Networking Organizations in Massachusetts's 8th congressional district 3 Registered Policy Organizations in Massachusetts's 8th congressional district 4 Registered Energy Companies in Massachusetts's 8th congressional district 5 Registered Financial Organizations in Massachusetts's 8th congressional district Registered Research Institutions in Massachusetts's 8th congressional district Fraunhofer Center for Sustainable Energy Systems

399

Automatic Tube Cleaning Systems for Condensers & Heat Exchangers  

E-Print Network (OSTI)

than 36 in. in diameter. Thus, mos of the ball systems are in fossil fuel, nuclear) cogeneration, and geothermal power plants. The temperature (maximum 220 0 F) and process limitations of the rubber ball material restrict the use of ball systems... of Heat Exchangers," Hydrocarbon Processing, pp. 25-27 (Jan. 1983) 7. Grande. M?? and K. SCIEah. "Automatic On-Line Mechanical Cleaning System for Condensers and Heat Exchangers," in EPRI Geothermal Conference and Yorkshop, Seminar Yorkbook (June 23...

Someah, K.

400

Energy efficient operation strategy design for the combined cooling, heating and power system.  

E-Print Network (OSTI)

??Combined cooling, heating and power (CCHP) systems are known as trigeneration systems, designed to provide electricity, cooling and heating simultaneously. The CCHP system has become… (more)

Liu, Mingxi

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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

Heat conduction in relativistic systems: alternatives and perspectives  

E-Print Network (OSTI)

The non-equilibrium thermodynamics of relativistic systems have a rich phenomenology. The simplest phenomenon in the class of dissipative processes is that of heat. This letter presents a brief summary of the efforts made to tackle the problem of relativistic heat conduction. In particular, we focus on the multi-fluid approach to relativistic dissipation.

C. S. Lopez-Monsalvo

2010-11-30T23:59:59.000Z

402

PAD District  

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

District District and State Production Capacity Alkylates Aromatics Asphalt and Road Oil Isomers Lubricants Marketable Petroleum Coke Sulfur (short tons/day) Hydrogen (MMcfd) Table 2. Production Capacity of Operable Petroleum Refineries by PAD District and State as of January 1, 2013 (Barrels per Stream Day, Except Where Noted) a 91,429 10,111 26,500 110,165 21,045 21,120 74 1,127 PAD District I Delaware 11,729 5,191 0 6,000 0 13,620 40 596 Georgia 0 0 24,000 0 0 0 0 0 New Jersey 37,200 0 63,500 4,000 12,000 7,500 31 290 Pennsylvania 42,500 4,920 22,065 16,500 2,945 0 0 240 West Virginia 0 0 600 0 6,100 0 3 1 268,106 95,300 159,000 260,414 9,100 158,868 584 7,104 PAD District II Illinois 83,900 19,900 38,100 16,000 0 70,495 202 2,397 Indiana 27,200 16,800 33,700 27,100 0 10,000 0 653

403

Topic 14. Retrofit and optimal operation of the building energy systems Performances of Low Temperature Radiant Heating Systems  

E-Print Network (OSTI)

panel system are given by its energy (the consumption of gas for heating, electricity for pumps Temperature Radiant Heating Systems Milorad Boji1*, Dragan Cvetkovi1 , Jasmina Skerli1 , Danijela Nikoli1, wall heating, floor heating, ceiling heating, EnergyPlus SUMMARY Low temperature heating panel systems

Paris-Sud XI, Université de

404

Heating mechanism affects equipartition in a binary granular system  

E-Print Network (OSTI)

Two species of particles in a binary granular system typically do not have the same mean kinetic energy, in contrast to the equipartition of energy required in equilibrium. We investigate the role of the heating mechanism in determining the extent of this non-equipartition of kinetic energy. In most experiments, different species of particle are unequally heated at the boundaries. We show by event-driven simulations that this differential heating at the boundary influences the level of non-equipartition even in the bulk of the system. This conclusion is fortified by studying a numerical model and a solvable stochastic model without spatial degrees of freedom. In both cases, even in the limit where heating events are rare compared to collisions, the effect of the heating mechanism persists.

Hong-Qiang Wang; Narayanan Menon

2007-10-19T23:59:59.000Z

405

Drainage, Sanitation, and Public Facilities Districts (Virginia) |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Drainage, Sanitation, and Public Facilities Districts (Virginia) Drainage, Sanitation, and Public Facilities Districts (Virginia) Drainage, Sanitation, and Public Facilities Districts (Virginia) < Back Eligibility Agricultural Commercial Construction Developer Industrial Investor-Owned Utility Local Government Municipal/Public Utility Rural Electric Cooperative Systems Integrator Tribal Government Utility Savings Category Water Buying & Making Electricity Home Weatherization Program Info State Virginia Program Type Siting and Permitting Provider Local Governments and Districts 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 regulate the construction and development of sanitation and waste disposal projects in their

406

Building America Webinar: Central Multifamily Water Heating Systems  

Energy.gov (U.S. Department of Energy (DOE))

Hosted by DOE's Building America program, this webinar will focus on the effective use of central heat pump water heaters (HPWHs) and control systems to reduce the energy use in hot water distribution.

407

Active charge/passive discharge solar heating systems: thermal analysis  

SciTech Connect

The performance of active charge/passive discharge solar space-heating systems is analyzed. This type of system combines liquid-cooled solar collector panels with a massive integral storage component that passively heats the building interior by radiation and free convection. The TRNSYS simulation program is used to evaluate system performance and to provide input for the development of a simplified analysis method. This method, which provides monthly calculations of delivered solar energy, is based on Klein's Phi-bar procedure and data from hourly TRNSYS simulations. The method can be applied to systems using a floor slab, a structural wall, or a water tank as the storage component. Important design parameters include collector area and orientation, building heat loss, collector and heat-exchanger efficiencies, storage capacity, and storage to room coupling.

Swisher, J.

1981-01-01T23:59:59.000Z

408

Parallel Condensing System As A Heat Sink For Power Plants  

E-Print Network (OSTI)

Conventional heat sink technologies of use the condenser/cooling tower arrangement or an air cooled condenser for condensing exhaust steam from steam turbines. Each of these two systems have certain advantages as well as disadvantages. This paper...

Akhtar, S. Z.

409

Split system CO2 heat pump water heaters  

NLE Websites -- All DOE Office Websites (Extended Search)

Split-system-CO2-heat-pump-water-heaters- Sign In About | Careers | Contact | Investors | bpa.gov Search Policy & Reporting Expand Policy & Reporting EE Sectors Expand EE...

410

Biomass Energy Small-Scale Combined Heat and Power Systems  

Science Journals Connector (OSTI)

Combined heat and power (CHP) generation is one of the essential pillar in a modern, sustainable, and environmentally friendly energy generation. This is due to the fact that cogeneration systems are energeti...

Daniel Büchner; Volker Lenz

2012-01-01T23:59:59.000Z

411

Biomass Energy Small-Scale Combined Heat and Power Systems  

Science Journals Connector (OSTI)

Combined heat and power (CHP) generation is one of the essential pillar in a modern, sustainable, and environmentally friendly energy generation. This is due to the fact that cogeneration systems are energeti...

Daniel Büchner; Volker Lenz

2013-01-01T23:59:59.000Z

412

Biomass Energy Heat Provision in Modern Small-Scale Systems  

Science Journals Connector (OSTI)

The use of wood for the supply of heat in furnace systems with small to medium capacity has never really gone out of fashion, particularly in rural areas. Especially in recent years, a virtual renaissance in t...

Dr. Hans Hartmann; Dr. Volker Lenz

2013-01-01T23:59:59.000Z

413

Biomass Energy Heat Provision in Modern Small-Scale Systems  

Science Journals Connector (OSTI)

The use of wood for the supply of heat in furnace systems with small to medium capacity has never really gone out of fashion, particularly in rural areas. Especially in recent years, a virtual renaissance in t...

Dr. Hans Hartmann; Dr. Volker Lenz

2012-01-01T23:59:59.000Z

414

In situ conversion process utilizing a closed loop heating system  

DOE Patents (OSTI)

An in situ conversion system for producing hydrocarbons from a subsurface formation is described. The system includes a plurality of u-shaped wellbores in the formation. Piping is positioned in at least two of the u-shaped wellbores. A fluid circulation system is coupled to the piping. The fluid circulation system is configured to circulate hot heat transfer fluid through at least a portion of the piping to form at least one heated portion of the formation. An electrical power supply is configured to provide electrical current to at least a portion of the piping located below an overburden in the formation to resistively heat at least a portion of the piping. Heat transfers from the piping to the formation.

Sandberg, Chester Ledlie (Palo Alto, CA); Fowler, Thomas David (Houston, TX); Vinegar, Harold J. (Bellaire, TX); Schoeber, Willen Jan Antoon Henri (Houston, TX)

2009-08-18T23:59:59.000Z

415

Reduce Natural Gas Use in Your Industrial Process Heating Systems  

SciTech Connect

This DOE Industrial Program fact sheet describes ten effective ways to save energy and money in industrial process heating systems by making some changes in equipment, operations, and maintenance.

Not Available

2007-09-01T23:59:59.000Z

416

Enhanced Geothermal Systems (EGS) with CO2as Heat Transmission...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

study heat extraction from hot porous systems by injection of cold CO 2 . * Reactive chemistry experiments for CO 2 -brine-rock are being assembled (INL). 6 | US DOE Geothermal...

417

Regional Districts (Texas)  

Energy.gov (U.S. Department of Energy (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,...

418

Solar heating system installed at Jackson, Tennessee. Final report  

SciTech Connect

The solar energy heating system installed at the Coca-Cola Bottling Works in Jackson, Tennessee is described. The system consists of 9480 square feet of Owens-Illinois evacuated tubular solar collectors with attached specular cylindrical reflectors and will provide space heating for the 70,000 square foot production building in the winter, and hot water for the bottle washing equipment the remainder of the year. Component specifications and engineering drawings are included. (WHK)

None

1980-10-01T23:59:59.000Z

419

Analysis of a solar assisted heat pump system for indoor swimming pool water and space heating  

Science Journals Connector (OSTI)

Solar energy application is a good alternative to replace primary energy source especially for large-scale installations. Heat pumps are also effective means to reduce primary energy consumption. This paper describes a case study with a new design of solar assisted heat pump (SAHP) for indoor swimming pool space- and water-heating purposes. The system design procedure was first presented. The entire system was then modeled via the TRNSYS simulation environment and the energy performance was evaluated based on the winter time operation schedule. Economic analysis with a range of collector areas was also performed. The simulation results show that the overall system COP can reach 4.5, and the fractional factor of energy saving is 79% as compared to the conventional energy system. The economical payback period is less than 5 years.

T.T. Chow; Y. Bai; K.F. Fong; Z. Lin

2012-01-01T23:59:59.000Z

420

Solar-assisted heat pump – A sustainable system for low-temperature water heating applications  

Science Journals Connector (OSTI)

Abstract Direct expansion solar assisted heat pump systems (DX-SAHP) have been widely used in many applications including water heating. In the DX-SAHP systems the solar collector and the heat pump evaporator are integrated into a single unit in order to transfer the solar energy to the refrigerant. The present work is aimed at studying the use of the DX-SAHP for low temperature water heating applications. The novel aspect of this paper involves a detailed long-term thermo-economic analysis of the energy conservation potential and economic viability of these systems. The thermal performance is simulated using a computer program that incorporates location dependent radiation, collector, economic, heat pump and load data. The economic analysis is performed using the life cycle cost (LCC) method. Results indicate that the DX-SAHP water heaters systems when compared to the conventional electrical water heaters are both economical as well as energy conserving. The analysis also reveals that the minimum value of the system life cycle cost is achieved at optimal values of the solar collector area as well as the compressor displacement capacity. Since the cost of SAHP system presents a barrier to mass scale commercialization, the results of the present study indicating that the SAHP life cycle cost can be minimized by optimizing the collector area would certainly be helpful in lowering, if not eliminating, the economic barrier to these systems. Also, at load temperatures higher than 70 °C, the performance of the single stage heat pump degrades to the extent that its cost and efficiency advantages over the electric only system are lost.

S.K. Chaturvedi; V.D. Gagrani; T.M. Abdel-Salam

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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

Colorado's 7th congressional district: Energy Resources | Open Energy  

Open Energy Info (EERE)

7th congressional district 7th congressional district 2 Registered Policy Organizations in Colorado's 7th congressional district 3 Registered Energy Companies in Colorado's 7th congressional district 4 Energy Generation Facilities in Colorado's 7th congressional district Registered Research Institutions in Colorado's 7th congressional district Colorado School of Mines - Colorado Energy Research Institute National Renewable Energy Laboratory Registered Policy Organizations in Colorado's 7th congressional district Colorado Renewable Energy Society Registered Energy Companies in Colorado's 7th congressional district Abengoa Solar Ampulse Ampulse Corporation Ascent Solar Blue Sun Biodiesel LLC CCBI, Inc. Colorado Fuel Cell Center CFCC Coors Ceramics Distributed Generation Systems Inc Distributed Generation Systems Inc DISGEN

422

Massachusetts's 7th congressional district: Energy Resources | Open Energy  

Open Energy Info (EERE)

Massachusetts. Massachusetts. Contents 1 Registered Research Institutions in Massachusetts's 7th congressional district 2 Registered Networking Organizations in Massachusetts's 7th congressional district 3 Registered Energy Companies in Massachusetts's 7th congressional district 4 Registered Financial Organizations in Massachusetts's 7th congressional district 5 Utility Companies in Massachusetts's 7th congressional district Registered Research Institutions in Massachusetts's 7th congressional district IDC Energy Insights Registered Networking Organizations in Massachusetts's 7th congressional district Northeast Energy Efficiency Partnerships, Inc Registered Energy Companies in Massachusetts's 7th congressional district A123 Systems A123Systems Ameresco, Inc. Analytic Power LLC

423

Combined Municipal Solid Waste and biomass system optimization for district energy applications  

SciTech Connect

Highlights: • Combined energy conversion of MSW and agricultural residue biomass is examined. • The model optimizes the financial yield of the investment. • Several system specifications are optimally defined by the optimization model. • The application to a case study in Greece shows positive financial yield. • The investment is mostly sensitive on the interest rate, the investment cost and the heating oil price. - Abstract: Municipal Solid Waste (MSW) disposal has been a controversial issue in many countries over the past years, due to disagreement among the various stakeholders on the waste management policies and technologies to be adopted. One of the ways of treating/disposing MSW is energy recovery, as waste is considered to contain a considerable amount of bio-waste and therefore can lead to renewable energy production. The overall efficiency can be very high in the cases of co-generation or tri-generation. In this paper a model is presented, aiming to support decision makers in issues relating to Municipal Solid Waste energy recovery. The idea of using more fuel sources, including MSW and agricultural residue biomass that may exist in a rural area, is explored. The model aims at optimizing the system specifications, such as the capacity of the base-load Waste-to-Energy facility, the capacity of the peak-load biomass boiler and the location of the facility. Furthermore, it defines the quantity of each potential fuel source that should be used annually, in order to maximize the financial yield of the investment. The results of an energy tri-generation case study application at a rural area of Greece, using mixed MSW and biomass, indicate positive financial yield of investment. In addition, a sensitivity analysis is performed on the effect of the most important parameters of the model on the optimum solution, pinpointing the parameters of interest rate, investment cost and heating oil price, as those requiring the attention of the decision makers. Finally, the sensitivity analysis is enhanced by a stochastic analysis to determine the effect of the volatility of parameters on the robustness of the model and the solution obtained.

Rentizelas, Athanasios A., E-mail: arent@central.ntua.gr; Tolis, Athanasios I., E-mail: atol@central.ntua.gr; Tatsiopoulos, Ilias P., E-mail: itat@central.ntua.gr

2014-01-15T23:59:59.000Z

424

AN OPTIMIZED TWO-CAPACITY ADVANCED ELECTRIC HEAT PUMP S. E. Veyo, Manager, Heat Exchange Systems Research  

E-Print Network (OSTI)

#12;AN OPTIMIZED TWO-CAPACITY ADVANCED ELECTRIC HEAT PUMP S. E. Veyo S. E. Veyo, Manager, Heat Exchange Systems Research Westinghouse Electric Corporation, R&D Center 1310 Beulah Road Pittsburgh, PA 15235 KEYWORDS: heat pump, air conditioner, electric, residential, energy, compressor, fan, blower, heat

Oak Ridge National Laboratory

425

Property:Heat Recovery Systems | Open Energy Information  

Open Energy Info (EERE)

Systems Systems Jump to: navigation, search Property Name Heat Recovery Systems Property Type Page Description Distributed Data heat recovery systems Pages using the property "Heat Recovery Systems" Showing 25 pages using this property. (previous 25) (next 25) C Capstone C30 + Unifin + Capstone C60 + Unifin HX + D Distributed Generation Study/10 West 66th Street Corp + Built-in + Distributed Generation Study/615 kW Waukesha Packaged System + Sondex PHE-Type SL140-TM-EE-190 +, Sondex PHE-Type SL140-TM-EE-150 +, Cain UTR1-810A17.5SSP + Distributed Generation Study/Aisin Seiki G60 at Hooligans Bar and Grille + Built-in + Distributed Generation Study/Arrow Linen + Built-in + Distributed Generation Study/Dakota Station (Minnegasco) + Unifin + Distributed Generation Study/Elgin Community College + Beaird Maxim Model TRP-12 +

426

Pool heating system on island brings year-round enjoyment  

SciTech Connect

The Bahamas is not generally thought of as a place in need of pool heating. However, the remote Bahamian island of Treasure Cay is actually situated north of Ft. Lauderdale, Florida. Pool temperatures drop during the winter, thus shortening the swimming season. The Beach Villas Homeowners Association of Treasure Cay investigated pool-heating options some time ago. Energy on Treasure Cay is expensive - about 25 cents/kWh - making cost a major concern for the association as they evaluated their choices. An electric heat pump was rule out as it would place too great a burden on the electricity load of the remote island. Heating the pool with propane gas was deemed far too costly. After evaluating each of these heating methods on the basis of economics, energy efficiency, and comfort, the association concluded that solar would be the best method. They selected a solar pool heating system manufactured by FAFCO, Inc. and installed by SUNWORKS in Ft. Lauderdale. The system requires virtually no daily maintenance, and there have been no problems with the system since its installation. In addition to being trouble-free, the FAFCO solar pool heater has saved Treasure Cay a great deal of money. The equipment cost about $9,500; lumber, PVC, and labor brought the total cost to $13,000. By comparison, a propane-gas system would have cost $4,000 but would have generated a yearly gas bill of $12,000. Therefore, payback on the system began immediately upon installation.

Not Available

1993-01-01T23:59:59.000Z

427

Thermal Hydraulic Optimization of Nuclear Systems [Heat Transfer and Fluid  

NLE Websites -- All DOE Office Websites (Extended Search)

Thermal Hydraulic Thermal Hydraulic Optimization of Nuclear Systems Capabilities Engineering Computation and Design Engineering and Structural Mechanics Systems/Component Design, Engineering and Drafting Heat Transfer and Fluid Mechanics Overview Thermal Hydraulic Optimization of Nuclear Systems Underhood Thermal Management Combustion Simulations Advanced Model and Methodology Development Multi-physics Reactor Performance and Safety Simulations Other Capabilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Heat Transfer and Fluid Mechanics Bookmark and Share Thermal Hydraulic Optimization of Nuclear Systems Accelerator Driven Test Facility Target Accelerator Driven Test Facility Target. Click on image to view larger

428

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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...

429

Foundation heat exchangers for residential ground source heat pump systems Numerical modeling and experimental validation  

SciTech Connect

A new type of ground heat exchanger that utilizes the excavation often made for basements or foundations has been proposed as an alternative to conventional ground heat exchangers. This article describes a numerical model that can be used to size these foundation heat exchanger (FHX) systems. The numerical model is a two-dimensional finite-volume model that considers a wide variety of factors, such as soil freezing and evapotranspiration. The FHX numerical model is validated with one year of experimental data collected at an experimental house located near Oak Ridge, Tennessee. The model shows good agreement with the experimental data-heat pump entering fluid temperatures typically within 1 C (1.8 F) - with minor discrepancies due to approximations, such as constant moisture content throughout the year, uniform evapotranspiration over the seasons, and lack of ground shading in the model.

Xing, Lu [Oklahoma State University; Cullin, James [Oklahoma State University; Spitler, Jeffery [Oklahoma State University; Im, Piljae [ORNL; Fisher, Daniel [Oklahoma State University

2011-01-01T23:59:59.000Z

430

A Waste Heat Recovery System for Light Duty Diesel Engines  

SciTech Connect

In order to achieve proposed fuel economy requirements, engines must make better use of the available fuel energy. Regardless of how efficient the engine is, there will still be a significant fraction of the fuel energy that is rejected in the exhaust and coolant streams. One viable technology for recovering this waste heat is an Organic Rankine Cycle. This cycle heats a working fluid using these heat streams and expands the fluid through a turbine to produce shaft power. The present work was the development of such a system applied to a light duty diesel engine. This lab demonstration was designed to maximize the peak brake thermal efficiency of the engine, and the combined system achieved an efficiency of 44.4%. The design of the system is discussed, as are the experimental performance results. The system potential at typical operating conditions was evaluated to determine the practicality of installing such a system in a vehicle.

Briggs, Thomas E [ORNL; Wagner, Robert M [ORNL; Edwards, Kevin Dean [ORNL; Curran, Scott [ORNL; Nafziger, Eric J [ORNL

2010-01-01T23:59:59.000Z

431

Solar Water Heating System Maintenance and Repair | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Water Heating System Maintenance and Repair Water Heating System Maintenance and Repair Solar Water Heating System Maintenance and Repair May 30, 2012 - 2:35pm Addthis Rooftop solar water heaters need regular maintenance to operate at peak efficiency. | Photo from iStockphoto.com Rooftop solar water heaters need regular maintenance to operate at peak efficiency. | Photo from iStockphoto.com Solar energy systems require periodic inspections and routine maintenance to keep them operating efficiently. Also, from time to time, components may need repair or replacement. You should also take steps to prevent scaling, corrosion, and freezing. You might be able to handle some of the inspections and maintenance tasks on your own, but others may require a qualified technician. Ask for a cost estimate in writing before having any work done. For some systems, it may

432

Southern Power District - Residential Energy Efficiency Rebate Programs |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Southern Power District - Residential Energy Efficiency Rebate Southern Power District - Residential Energy Efficiency Rebate Programs Southern Power District - Residential Energy Efficiency Rebate Programs < Back Eligibility Residential Savings Category Home Weatherization Commercial Weatherization Heating & Cooling Commercial Heating & Cooling Cooling Heat Pumps Program Info State Nebraska Program Type Utility Rebate Program Rebate Amount Air Source Heat Pump: $100- $300 Geothermal Heat Pump: $400 Heat Pump (14 Seer minimum): $50 contractor rebate Attic Insulation: $0.15/sq. ft. HVAC Tune-Up: $30 Provider Southern Power District 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 install 14 Seer or

433

Assessment of district energy supply from Schiller Generating Station  

SciTech Connect

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

434

Simulation Models for Improved Water Heating Systems  

E-Print Network (OSTI)

distribution (in multi-family buildings); efficiency (eithercentral systems in multi- family buildings are assigned a54 °C (130 °F) for multi-family buildings that have central

Lutz, Jim

2014-01-01T23:59:59.000Z

435

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

sensors and control valves used in our generalized experimental system. The experimental solarsensors are remotely located at critical (in terms of decision-making) locations in the solar

Dols, C.

2010-01-01T23:59:59.000Z

436

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

437

Natural convection heat exchangers for solar water heating systems. Technical progress report, November 15, 1996--January 14, 1997  

SciTech Connect

The goals of this project are: (1) to develop guidelines for the design and use of thermosypohon side-arm heat exchangers in solar domestic water heating systems, and (2) to establish appropriate modeling and testing criteria for evaluating the performance of systems using this type of heat exchanger.

Davidson, J.H.

1998-06-01T23:59:59.000Z

438

Heat storage system utilizing phase change materials government rights  

DOE Patents (OSTI)

A thermal energy transport and storage system is provided which includes an evaporator containing a mixture of a first phase change material and a silica powder, and a condenser containing a second phase change material. The silica powder/PCM mixture absorbs heat energy from a source such as a solar collector such that the phase change material forms a vapor which is transported from the evaporator to the condenser, where the second phase change material melts and stores the heat energy, then releases the energy to an environmental space via a heat exchanger. The vapor is condensed to a liquid which is transported back to the evaporator. The system allows the repeated transfer of thermal energy using the heat of vaporization and condensation of the phase change material.

Salyer, Ival O. (Dayton, OH)

2000-09-12T23:59:59.000Z

439

Assessment of dynamic energy conversion systems for radioisotope heat sources  

SciTech Connect

The use of dynamic conversion systems to convert the heat generated in a 7500 W(t) 90 Sr radioisotopic heat source to electricity is examined. The systems studies were Stirling; Brayton Cycle; three organic Rankines (ORCs) (Barber-Nichols/ORMAT, Sundstrand, and TRW); and an organic Rankine plus thermoelectrics. The systems were ranked for a North Warning System mission using a Los Alamos Multiattribute Decision Theory code. Three different heat source designs were used: case I with a beginning of life (BOL) source temperature of 640 C, case II with a BOL source temperature of 745/sup 0/C, and case III with a BOL source temperature of 945/sup 0/C. The Stirling engine system was the top-ranked system of cases I and II, closely followed by the ORC systems in case I and ORC plus thermoelectrics in case II. The Brayton cycle system was top-ranked for case III, with the Stirling engine system a close second. The use of /sup 238/Pu in heat source sizes of 7500 W(t) was examined and found to be questionable because of cost and material availability and because of additional requirements for analysis of safeguards and critical mass.

Thayer, G.R.; Mangeng, C.A.

1985-06-01T23:59:59.000Z

440

Fuel cell system with combustor-heated reformer  

DOE Patents (OSTI)

A fuel cell system including a fuel reformer heated by a catalytic combustor fired by anode effluent and/or fuel from a liquid fuel supply providing fuel for the fuel cell. The combustor includes a vaporizer section heated by the combustor exhaust gases for vaporizing the fuel before feeding it into the combustor. Cathode effluent is used as the principle oxidant for the combustor.

Pettit, William Henry (Rochester, NY)

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "district heating system" 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

Study of the Heating Load of a Manufactured Space with a Gas-fired Radiant Heating System  

E-Print Network (OSTI)

A thermal balance mathematics model of a manufactured space with a gas-fired radiant heating system is established to calculate the heating load. Computer programs are used to solve the model. Envelope internal surface temperatures under different...

Zheng, X.; Dong, Z.

2006-01-01T23:59:59.000Z

442

Effect of alumina nanoparticles in the fluid on heat transfer in double-pipe heat exchanger system  

Science Journals Connector (OSTI)

This study was performed to investigate the convective heat transfer coefficient of nanofluids made of several alumina ... transformer oil which flow through a double pipe heat exchanger system in the laminar flo...

Byung-Hee Chun; Hyun Uk Kang; Sung Hyun Kim

2008-09-01T23:59:59.000Z

443

Emissions and Heat Transfer in Combustion Systems  

Science Journals Connector (OSTI)

A variety of combustion systems that employ turbulent diffusion combustion have been major sources of air pollutants such as NOx, particulates and hydrocarbons in spite of their high thermal efficiency compare...

Y. Daisho

1993-01-01T23:59:59.000Z

444

Combined Heat and Power (CHP) Systems  

Energy.gov (U.S. Department of Energy (DOE))

The CHP systems program aimed to facilitate acceptance of distributed energy in end-use sectors by forming partnerships with industry consortia in the commercial building, merchant stores, light...

445

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

Solar Energy Society Meeting, Los Angeles, California, Julysolar in- solation measuring stations in northern and central California (California 94720 August 1975 A control system is being developed that will be capable of operating solar

Dols, C.

2010-01-01T23:59:59.000Z

446

APPLICATIONS OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS TO  

E-Print Network (OSTI)

APPLICATIONS OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS TO BUILDINGS AND BRIDGE DECKS. By MAHADEVAN PUMP SYSTEMS TO BUILDINGS AND BRIDGE DECKS. Thesis Approved cannot find enough words to thank my father, H. Ramamoorthy, my mother, R. Devasena, and my brother

447

Experimental investigation on system with combination of ground-source heat pump and solar collector  

Science Journals Connector (OSTI)

This paper presents the heating performance and energy distribution of a system with the combination of ground-source heat pump and solar collector or a solar-assisted ground-source heat pump system (SAGSHPS) by ...

Tao Hu ? ?; Jialing Zhu ???; Wei Zhang ? ?

2013-06-01T23:59:59.000Z

448

Omaha Public Power District- Residential Energy Efficiency Rebate Program  

Energy.gov (U.S. Department of Energy (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...

449

Small-scale circulating fluidized bed combustor (CFBC) system for heat and power in remote areas  

SciTech Connect

Demand for heating and electric power has steadily increased in remote areas. The use of locally available fuel to achieve self sufficiency has become an important objective. Energy demands may require steam generation for district heating, power generation and process consumption. In addition, the steam generation unit can also be required to burn waste that includes MSW and sewage sludge. To meet these demands, new systems must be installed that use local fuel. This paper describes a lower cost CFBC for use in remote areas. With the support of DOE METC, in late summer 1994, DONLEE performed a test burn at its 10 MM btu/hr pilot CFBC using subbituminous coal from Wyoming. The Wyoming coal`s sulfur dioxide emissions were very low due to the low sulfur content of the Wyoming coal and the excellent efficiency at temperatures as low as 1,500 F thereby indicating no limestone addition was needed for sulfur capture. The CFBC testing indicated emissions met all of the environmental requirements, both Federal and state. These requirements include: particulates, SO{sub 2}, CO, NO{sub x}, opacity, chlorinated dioxins/furans, etc. The unit can be fabricated in modules, making the installation easier and less expensive for use in remote areas. The design is highly reliable and can be fully automated thereby requiring limited staffing.

Stuart, J.M.; Korenberg, J. [DONLEE Technologies Inc., York, PA (United States)

1995-12-31T23:59:59.000Z

450

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

451

Lamp system for uniform semiconductor wafer heating  

DOE Patents (OSTI)

A lamp system with a very soft high-intensity output is provided over a large area by water cooling a long-arc lamp inside a diffuse reflector of polytetrafluorethylene (PTFE) and titanium dioxide (TiO.sub.2) white pigment. The water is kept clean and pure by a one micron particulate filter and an activated charcoal/ultraviolet irradiation system that circulates and de-ionizes and biologically sterilizes the coolant water at all times, even when the long-arc lamp is off.

Zapata, Luis E. (Livermore, CA); Hackel, Lloyd (Livermore, CA)

2001-01-01T23:59:59.000Z

452

Geothermal heating system for the Children's Museum of Utah  

SciTech Connect

The results of a study to determine the engineering and economic feasibility of using the Wasatch Hot Spring resource for space heating of the Children's Library building are presented. The Wasatch Hot Spring with a reported flow of about 63 gpm (240 l/min) at an average temperature of 104/sup 0/F is not capable of furnishing the needed heat for the Children's Museum building. The underground paths along which the thermal waters flow to their outlets at the Warm Springs Fault are not presently known. It is possible if the thermal water ascends from the deep layers of the earth along the Warm Springs Fault that increased geothermal flow at a higher temperature can be produced by drilling into the fault. Assuming that sufficient geothermal fluid quantity is produced by drilling in the area, an analysis is made of a geothermal heating system for the building based on different fluid temperatures. It is assumed that the present and planned heating systems be left intact with the gas fired boilers taking over during cold periods when the geothermal system fails to provide sufficient heat. Economic analysis shows that the geothermal system is very attractive, even for the lowest geothermal fluid temperature considered (110/sup 0/F).

Karlsson, T.

1984-07-01T23:59:59.000Z

453

Composite quantum systems and environment-induced heating  

E-Print Network (OSTI)

In recent years, much attention has been paid to the development of techniques which transfer trapped particles to very low temperatures. Here we focus our attention on a heating mechanism which contributes to the finite temperature limit in laser sideband cooling experiments with trapped ions. It is emphasized that similar heating processes might be present in a variety of composite quantum systems whose components couple individually to different environments. For example, quantum optical heating effects might contribute significantly to the very high temperatures which occur during the collapse phase in sonoluminescence experiments. It might even be possible to design composite quantum systems, like atom-cavity systems, such that they continuously emit photons even in the absence of external driving.

Almut Beige; Andreas Kurcz; Adam Stokes

2011-10-07T23:59:59.000Z

454

Waste heat recovery system for recapturing energy after engine aftertreatment systems  

SciTech Connect

The disclosure provides a waste heat recovery (WHR) system including a Rankine cycle (RC) subsystem for converting heat of exhaust gas from an internal combustion engine, and an internal combustion engine including the same. The WHR system includes an exhaust gas heat exchanger that is fluidly coupled downstream of an exhaust aftertreatment system and is adapted to transfer heat from the exhaust gas to a working fluid of the RC subsystem. An energy conversion device is fluidly coupled to the exhaust gas heat exchanger and is adapted to receive the vaporized working fluid and convert the energy of the transferred heat. The WHR system includes a control module adapted to control at least one parameter of the RC subsystem based on a detected aftertreatment event of a predetermined thermal management strategy of the aftertreatment system.

Ernst, Timothy C.; Nelson, Christopher R.

2014-06-17T23:59:59.000Z

455

VAPOR COMPRESSION HEAT PUMP SYSTEM FIELD TESTS AT THE TECH COMPLEX  

E-Print Network (OSTI)

323 CHAPTER 17 VAPOR COMPRESSION HEAT PUMP SYSTEM FIELD TESTS AT THE TECH COMPLEX \\B E Van D for several novel and conventional heat pump systems for space conditioning and water heating. Systems tested include the Annual Cycle Energy System (ACES), solar assisted heat pumps (SAHP) both parallel and series

Oak Ridge National Laboratory

456

Optimal Ground-Source Heat Pump System Design  

Energy.gov (U.S. Department of Energy (DOE))

Project objectives: Develop a least-cost design tool (OptGSHP) that will enable GSHP developers to analyze system cost and performance in a variety of building applications to support both design, operational and purchase decisions. Integrate groundwater flow and heat transport into OptGSHP. Demonstrate the usefulness of OptGSHP and the significance of a systems approach to the design of GSHP systems.

457

BETTER DUCT SYSTEMS FOR HOME HEATING AND COOLING.  

SciTech Connect

This is a series of six guides intended to provide a working knowledge of residential heating and cooling duct systems, an understanding of the major issues concerning efficiency, comfort, health, and safety, and practical tips on installation and repair of duct systems. These guides are intended for use by contractors, system designers, advanced technicians, and other HVAC professionals. The first two guides are also intended to be accessible to the general reader.

ANDREWS,J.

2001-01-01T23:59:59.000Z

458

Advanced Burners and Combustion Controls for Industrial Heat Recovery Systems  

E-Print Network (OSTI)

ADVANCED BURNERS AND COMBUSTION CONTROLS FOR INDUSTRIAL HEAT RECOVERY SYSTEMS J.L.FERRI GTE PRODUCTS CORPORATION TOWANDA, PA ABSTRACT When recuperators are installed on indus trial furnaces, burners and ratio control systems must... recuperators by demonstrating their technical and economi cal feasibility in well monitored field installations (1). During the contract, it became evident to GTE that a systems approach (recuperator, burner, and con troIs) is necessary to be accepted...

Ferri, J. L.

459

Cowlitz County PUD - H2 AdvantagePlus Residential Heat Pump Program |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Cowlitz County PUD - H2 AdvantagePlus Residential Heat Pump Program Cowlitz County PUD - H2 AdvantagePlus Residential Heat Pump Program Cowlitz County PUD - H2 AdvantagePlus Residential Heat Pump Program < Back Eligibility Residential Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Program Info State District of Columbia Program Type Utility Rebate Program Rebate Amount Heat Pumps: $450 - $1,800 Conversion from Electric Forced Air Furnace: $1,400 - $1,900 Duct Sealing: $50 - $350 Heat Pump Controls: $300 Provider Cowlitz County Public Utility District Cowlitz County PUD will provide rebates to customer homeowners who have a PUD-qualified heat pump dealer upgrade their heating system with the installation of a premium efficiency heat pump system, in accordance with the PUD's rigid set of installation standards, and who upgrade their

460

Major Source Permits (District of Columbia) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Major Source Permits (District of Columbia) Major Source Permits (District of Columbia) Major Source Permits (District of Columbia) < Back Eligibility Utility Commercial Industrial Program Info State District of Columbia Program Type Environmental Regulations Provider District Department of the Environment The District reviews designs for new pollution sources and design modifications for existing sources. Permits are issued to allow sources to emit limited and specified amounts of pollution as allowed by air quality laws and regulations. Major sources include power plants, heating plants, and large printing facilities. Three types of permits are issued: pre-construction review permits; new source review permits; and operating permits. These permits include conditions intended to minimize emissions of

Note: This page contains sample records for the topic "district heating system" 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

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

Energy.gov (U.S. Department of Energy (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...

462

Renewable energy of waste heat recovery system for automobiles  

Science Journals Connector (OSTI)

A system to recover waste heat comprised of eight thermoelectric generators (TEGs) to convert heat from the exhaust pipe of an automobile to electrical energy has been constructed. Simulations and experiments for the thermoelectric module in this system are undertaken to assess the feasibility of these applications. In order to estimate the temperature difference between thermoelectric elements a network of thermal resistors is constructed. The results assist in predicting power output of TEG module more precisely. Three configurations of heat sinks which are comprised of 10 22 and 44 fins are applied in this simulation. The results of the simulations show the average thermal resistance of these heat sinks in each section of the system with varied velocity of external flow. As the performance of a TEG module is influenced by an applied pressure through the effect of the thermal contact resistance we clamp the TE module to our experimental apparatus; the relation between power output and pressure applied in this case is presented. Besides simulations the system is designed and assembled. Measurements followed the connection of the system to the middle of an exhaust pipe. Through these simulations and experiments the power generated with a commercial TEG is presented. The results establish the fundamental development of materials that enhance the TEG efficiency for vehicles.

Cheng-Ting Hsu; Da-Jeng Yao; Ke-Jyun Ye; Ben Yu

2010-01-01T23:59:59.000Z

463

Hybrid sodium heat pipe receivers for dish/Stirling systems  

SciTech Connect

The design of a hybrid solar/gas heat pipe receiver for the SBP 9 kW dish/Stirling system using a United Stirling AB V160 Stirling engine and the results of on-sun testing in alternative and parallel mode will be reported. The receiver is designed to transfer a thermal power of 35 kW. The heat pipe operates at around 800 C, working fluid is sodium. Operational options are solar-only, gas augmented and gas-only mode. Also the design of a second generation hybrid heat pipe receiver currently developed under a EU-funded project, based on the experience gained with the first hybrid receiver, will be reported. This receiver is designed for the improved SPB/L. and C.-10 kW dish/Stirling system with the reworked SOLO V161 Stirling engine.

Laing, D.; Reusch, M. [Deutsche Forschungsanstalt fuer Luft- und Raumfahrt e.V., Stuttgart (Germany). Inst. fuer Technische Thermodynamik

1997-12-31T23:59:59.000Z

464

Thermally conductive cementitious grout for geothermal heat pump systems  

DOE Patents (OSTI)

A thermally conductive cement-sand grout for use with a geothermal heat pump system. The cement sand grout contains cement, silica sand, a superplasticizer, water and optionally bentonite. The present invention also includes a method of filling boreholes used for geothermal heat pump systems with the thermally conductive cement-sand grout. The cement-sand grout has improved thermal conductivity over neat cement and bentonite grouts, which allows shallower bore holes to be used to provide an equivalent heat transfer capacity. In addition, the cement-sand grouts of the present invention also provide improved bond strengths and decreased permeabilities. The cement-sand grouts can also contain blast furnace slag, fly ash, a thermoplastic air entraining agent, latex, a shrinkage reducing admixture, calcium oxide and combinations thereof.

Allan, Marita (Old Field, NY)

2001-01-01T23:59:59.000Z

465

Economic Improvement Districts (Indiana) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Improvement Districts (Indiana) Improvement Districts (Indiana) Economic Improvement Districts (Indiana) < Back Eligibility Agricultural Commercial Construction Fuel Distributor Industrial Installer/Contractor Investor-Owned Utility Local Government Municipal/Public Utility Retail Supplier Rural Electric Cooperative State/Provincial Govt Systems Integrator Transportation Tribal Government Utility Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State Indiana Program Type Bond Program Industry Recruitment/Support Provider Indiana Economic Development Corporation 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 issue revenue

466

Project Profile: The Sacramento Municipal Utility District Consumnes Power Plant Solar Augmentation Project  

Energy.gov (U.S. Department of Energy (DOE))

The Sacramento Municipal Utility District (SMUD), under the Concentrating Solar Power (CSP) Heat Integration for Baseload Renewable Energy Development (HIBRED) program, is demonstrating a hybrid CSP solar energy system that takes advantage of an existing electrical generator for its power block and transmission interconnection.

467

Optimal design and control strategies for novel combined heat and power (CHP) fuel cell systems. Part II of II, case study results.  

SciTech Connect

Innovative energy system optimization models are deployed to evaluate novel fuel cell system (FCS) operating strategies, not typically pursued by commercial industry. Most FCS today are installed according to a 'business-as-usual' approach: (1) stand-alone (unconnected to district heating networks and low-voltage electricity distribution lines), (2) not load following (not producing output equivalent to the instantaneous electrical or thermal demand of surrounding buildings), (3) employing a fairly fixed heat-to-power ratio (producing heat and electricity in a relatively constant ratio to each other), and (4) producing only electricity and no recoverable heat. By contrast, models discussed here consider novel approaches as well. Novel approaches include (1) networking (connecting FCSs to electrical and/or thermal networks), (2) load following (having FCSs produce only the instantaneous electricity or heat demanded by surrounding buildings), (3) employing a variable heat-to-power ratio (such that FCS can vary the ratio of heat and electricity they produce), (4) co-generation (combining the production of electricity and recoverable heat), (5) permutations of these together, and (6) permutations of these combined with more 'business-as-usual' approaches. The detailed assumptions and methods behind these models are described in Part I of this article pair.

Colella, Whitney G.

2010-06-01T23:59:59.000Z

468

Optimizal design and control strategies for novel Combined Heat and Power (CHP) fuel cell systems. Part II of II, case study results.  

SciTech Connect

Innovative energy system optimization models are deployed to evaluate novel fuel cell system (FCS) operating strategies, not typically pursued by commercial industry. Most FCS today are installed according to a 'business-as-usual' approach: (1) stand-alone (unconnected to district heating networks and low-voltage electricity distribution lines), (2) not load following (not producing output equivalent to the instantaneous electrical or thermal demand of surrounding buildings), (3) employing a fairly fixed heat-to-power ratio (producing heat and electricity in a relatively constant ratio to each other), and (4) producing only electricity and no recoverable heat. By contrast, models discussed here consider novel approaches as well. Novel approaches include (1) networking (connecting FCSs to electrical and/or thermal networks), (2) load following (having FCSs produce only the instantaneous electricity or heat demanded by surrounding buildings), (3) employing a variable heat-to-power ratio (such that FCS can vary the ratio of heat and electricity they produce), (4) co-generation (combining the production of electricity and recoverable heat), (5) permutations of these together, and (6) permutations of these combined with more 'business-as-usual' approaches.

Colella, Whitney G.

2010-04-01T23:59:59.000Z

469

Thermal and economical analysis of an underground seasonal storage heating system in Thrace  

Science Journals Connector (OSTI)

Economical analysis of the solar heating system with seasonal storage, which was established in Edirne (41°39?54?N) in order to provide the heat requirement of buildings, has been fulfilled. Optimum collector area for the heating system has been determined. Total heat requirement of 69% has been met by means of heating system concerning the space heating and domestic water heating. In the accordance with the results of the economical analysis, the payback time of the heating system has been determined as 19–20 years.

Berrin Karacavus; Ahmet Can

2009-01-01T23:59:59.000Z

470

Open-Cycle Vapor Compression Heat Pump System  

E-Print Network (OSTI)

to the desired pressure level for process use. The compressor is driven by a gas turbine or gas engine prime mover. To enhance the system performance, the prime mover exhaust and/or cooling jacket heat is recovered to generate additional process steam or hot...

Pasquinelli, D. M.; Becker, F. E.

1983-01-01T23:59:59.000Z

471

Central Energy Systems - Applications to Economic Development  

E-Print Network (OSTI)

the conceptual stage of design. The second program, Central Energy Systems Analysis Program (CESAP) analyzes energy efficiency for a group of buildings and determines if a new district heating and cooling (DHC) system would be a cost effective application...

Myers, M. S.; Diserens, S. E.

1985-01-01T23:59:59.000Z

472

Vera Irrigation District #15 - Energy Efficiency Rebate Program |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Vera Irrigation District #15 - Energy Efficiency Rebate Program Vera Irrigation District #15 - Energy Efficiency Rebate Program Vera Irrigation District #15 - Energy Efficiency Rebate Program < Back Eligibility Residential Savings Category Appliances & Electronics Home Weatherization Sealing Your Home Design & Remodeling Windows, Doors, & Skylights Commercial Weatherization Ventilation Heating & Cooling Commercial Heating & Cooling Heat Pumps Water Heating Maximum Rebate $1,500 Program Info State District of Columbia Program Type Utility Rebate Program Rebate Amount Refrigerator/Freezer Recycling: $30 Water Heaters: $100 Windows: $6/sq. ft. Heat Pumps: $450 Duct Sealing: $400 - $500 Clothes Washer: $30 Ductless Heat Pumps: $1,500 Vera Irrigation District #15 offers rebates to electric customers who improve energy efficiency. Rebates are available for water heaters,

473

Solar passive ceiling system. Final report. [Passive solar heating system with venetian blind reflectors and latent heat storage in ceiling  

SciTech Connect

The construction of a 1200 square foot building, with full basement, built to be used as a branch library in a rural area is described. The primary heating source is a passive solar system consisting of a south facing window system. The system consists of: a set of windows located in the south facing wall only, composed of double glazed units; a set of reflectors mounted in each window which reflects sunlight up to the ceiling (the reflectors are similar to venetian blinds); a storage area in the ceiling which absorbs the heat from the reflected sunlight and stores it in foil salt pouches laid in the ceiling; and an automated curtain which automatically covers and uncovers the south facing window system. The system is totally passive and uses no blowers, pumps or other active types of heat distribution equipment. The building contains a basement which is normally not heated, and the north facing wall is bermed four feet high around the north side.

Schneider, A.R.

1980-01-01T23:59:59.000Z

474

A capital cost comparison of commercial ground-source heat pump systems  

SciTech Connect

The report provides a capital cost comparison of commercial ground source heat pump systems. The study includes groundwater systems, ground-coupled systems and hybrid systems.

Rafferty, K.

1994-06-01T23:59:59.000Z

475

Combined heat and power systems for commercial buildings: investigating cost, emissions, and primary energy reduction based on system components.  

E-Print Network (OSTI)

?? Combined heat and power (CHP) systems produce electricity and useful heat from fuel. When power is produced near a building which consumes power, transmission… (more)

Smith, Amanda D.

2012-01-01T23:59:59.000Z

476

Combined ICR heating antenna for ion separation systems  

SciTech Connect

A combination of one- and two-wave antennas (one and two turns of conductors around a plasma cylinder, respectively) is proposed. This combined antenna localizes an RF field within itself. It is shown that spent nuclear fuel processing systems based on ICR heating of nuclear ash by such a combined antenna have high productivity. A theory of the RF field excitation in ICR ion separation systems is presented in a simple and compact form.

Timofeev, A. V. [Russian Research Centre Kurchatov Institute (Russian Federation)

2011-01-15T23:59:59.000Z

477

Optimization of Heat Transfer Systems and Use of the Environmental Exergy Potential - Application to Compact Heat Exchangers and Heat Pumps.  

E-Print Network (OSTI)

??In this thesis, the optimization of forced convection heat sinks and groundwater-source heat pumps is addressed with the purpose of improving energy efficiency. Parallel ducts… (more)

Canhoto, Paulo

2012-01-01T23:59:59.000Z

478

Thermoelectric Generators for Automotive Waste Heat Recovery Systems Part II: Parametric Evaluation  

E-Print Network (OSTI)

Thermoelectric Generators for Automotive Waste Heat Recovery Systems Part II: Parametric Evaluation been proposed to model thermoelectric generators (TEGs) for automotive waste heat recovery. Details: Thermoelectric generators, waste heat recovery, automotive exhaust, skutterudites INTRODUCTION In part I

Xu, Xianfan

479

Thermoelectric Generators for Automotive Waste Heat Recovery Systems Part I: Numerical Modeling  

E-Print Network (OSTI)

Thermoelectric Generators for Automotive Waste Heat Recovery Systems Part I: Numerical Modeling telluride TEMs. Key words: Thermoelectric generators, waste heat recovery, automotive exhaust, skutterudites bismuth telluride are considered for thermoelectric modules (TEMs) for conversion of waste heat from

Xu, Xianfan

480

Investigation of a Novel Solar Assisted Water Heating System with Enhanced Energy Yield for Buildings  

E-Print Network (OSTI)

simulation and experimental verification. The unique characteristic of such system consists in the integrated loop heat pipe and heat pump unit (LHP-HP), which was proposed to improve solar photovoltaic (PV) generation, capture additional solar heat...

Zhang, X.; Zhao, X.; Xu, J.; Yu, X.

2012-01-01T23:59:59.000Z

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