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Note: This page contains sample records for the topic "radiator heating systems" 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

A Variational Method for Computing Surface Heat Fluxes from ARM Surface Energy and Radiation Balance Systems  

Science Conference Proceedings (OSTI)

A variational method is developed to compute surface fluxes of sensible and latent heat from observed wind, temperature, humidity, and surface energy and radiation budget by the surface energy and radiation balance systems (SERBS). In comparison ...

Qin Xu; Chong-Jian Qiu

1997-01-01T23:59:59.000Z

2

Analytical and experimental studies of heat pipe radiation cooling of hypersonic propulsion systems  

SciTech Connect

Preliminary, research-oriented, analytical and experimental studies were completed to assess the feasibility of using high-temperature heat pipes to cool hypersonic engine components. This new approach involves using heat pipes to transport heat away from the combustor, nozzle, or inlet regions, and to reject it to the environment by thermal radiation from an external heat pipe nacelle. For propulsion systems using heat pipe radiation cooling (HPRC), it is possible to continue to use hydrocarbon fuels into the Mach 4 to Mach 6 speed range, thereby enhancing the economic attractiveness of commercial or military hypersonic flight. In the second-phase feasibility program recently completed, we found that heat loads produced by considering both convection and radiation heat transfer from the combustion gas can be handled with HPRC design modifications. The application of thermal insulation to ramburner and nozzle walls was also found to reduce the heat load by about one-half and to reduce peak HPRC system temperatures to below 2700{degrees}F. In addition, the operation of HPRC at cruise conditions of around Mach 4.5 and at an altitude of 90, 000 ft lowers peak hot section temperatures to around 2800{degrees}F. An HPRC heat pipe was successfully fabricated and tested at Mach 5 conditions of heat flux, heat load, and temperature. 24 refs.

Martin, R.A.; Merrigan, M.A.; Elder, M.G.; Sena, J.T.; Keddy, E.S. (Los Alamos National Lab., NM (United States)); Silverstein, C.C. (CCS Associates, Bethel Park, PA (United States))

1992-01-01T23:59:59.000Z

3

Analytical and experimental studies of heat pipe radiation cooling of hypersonic propulsion systems  

SciTech Connect

Preliminary, research-oriented, analytical and experimental studies were completed to assess the feasibility of using high-temperature heat pipes to cool hypersonic engine components. This new approach involves using heat pipes to transport heat away from the combustor, nozzle, or inlet regions, and to reject it to the environment by thermal radiation from an external heat pipe nacelle. For propulsion systems using heat pipe radiation cooling (HPRC), it is possible to continue to use hydrocarbon fuels into the Mach 4 to Mach 6 speed range, thereby enhancing the economic attractiveness of commercial or military hypersonic flight. In the second-phase feasibility program recently completed, we found that heat loads produced by considering both convection and radiation heat transfer from the combustion gas can be handled with HPRC design modifications. The application of thermal insulation to ramburner and nozzle walls was also found to reduce the heat load by about one-half and to reduce peak HPRC system temperatures to below 2700{degrees}F. In addition, the operation of HPRC at cruise conditions of around Mach 4.5 and at an altitude of 90, 000 ft lowers peak hot section temperatures to around 2800{degrees}F. An HPRC heat pipe was successfully fabricated and tested at Mach 5 conditions of heat flux, heat load, and temperature. 24 refs.

Martin, R.A.; Merrigan, M.A.; Elder, M.G.; Sena, J.T.; Keddy, E.S. [Los Alamos National Lab., NM (United States); Silverstein, C.C. [CCS Associates, Bethel Park, PA (United States)

1992-06-01T23:59:59.000Z

4

Performance Analysis of Potassium Heat Pipes Radiator for HP-STMCs Space Reactor Power System  

SciTech Connect

A detailed design and performance results of C-C finned, and armored potassium heat pipes radiator for a 110 kWe Heat Pipes-Segmented Thermoelectric Module Converters (HP-STMCs) Space Reactor Power system (SRPS) are presented. The radiator consists of two sections; each serves an equal number of STMCs and has 162 longitudinal potassium heat pipes with 0.508 mm thick C-C fins. The width of the C-C fins at the minor diameter of the radiator is almost zero, but increases with distance along the radiator to reach 3.7 cm at the radiator's major diameter. The radiator's heat pipes (OD = 2.42 cm in front and 3.03 cm in rear) have thin titanium (0.0762 mm thick) liners and wicks (0.20 mm thick with an effective pore radius of 12-16 {mu}m) and a 1.016 mm thick C-C wall. The wick is separated from the titanium liner by a 0.4 mm annulus filled with liquid potassium to increase the capillary limit. The outer surfaces of the heat pipes in the front and rear sections of the radiator are protected with a C-C armor that is 2.17 mm and 1.70 mm thick, respectively. The inside surface of the heat pipes in the front radiator is thermally insulated while the C-C finned condensers of the rear heat pipes are exposed, radiating into space through the rear opening of the radiator cavity. The heat pipes in both the front and the rear radiators have a 1.5 m long evaporator section and each dissipates 4.47 kW while operating at 43.6% of the prevailing sonic limit. The front and rear radiator sections are 5.29 m and 2.61 m long with outer surface area and mass of 47.1 m2 and 314.3 kg, and 39.9 m2 and 243.2 kg, respectively. The total radiator is 7.63 m long and has minor and major diameters of 1.48 m and 5.57 m, respectively, and a total surface area of 87 m2; however, the effective radiator area, after accounting for heat rejection through the rear of the radiator cavity, is 98.8 m2. The radiator's total mass including the C-C armor is 557.5 kg and the specific area and specific mass are 6.41 kg/m2 and 5.07 kg/kWe, respectively.

El-Genk, Mohamed S.; Tournier, Jean-Michel [Institute for Space and Nuclear Power Studies, University of New Mexico, Albuquerque, NM, 87131 (United States); Chemical and Nuclear Engineering Dept., University of New Mexico, Albuquerque, NM, 87131 (United States)

2004-02-04T23:59:59.000Z

5

Conceptual design of a heat pipe radiator  

SciTech Connect

A conceptual design of a waste heat radiator has been developed for a thermoelectric space nuclear power system. The basic shape of the heat pipe radiator was a frustum of a right circular cone. The design included stringer heat pipes to carry reject heat from the thermoelectric modules to the radiator skin that was composed of small-diameter, thin-walled cross heat pipes. The stringer heat pipes were armored to resist puncture by a meteoroid. The cross heat pipes were designed to provide the necessary unpunctured radiating area at the mission end with a minimum initial system mass. Several design cases were developed in which the individual stringer survival probabilities were varied and the radiator system mass was calculated. Results are presented for system mass as a function of individual stringer survival probability for six candidate container materials, three candidate heat pipe fluids, two radiator operating temperatures, two meteoroid shield types, and two radiating surface cases. Results are also presented for radiator reject heat as a function of system mass, area, and length for three system sizes.

Bennett, G.A.

1977-09-01T23:59:59.000Z

6

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

7

Improved solar heating systems  

DOE Patents (OSTI)

An improved solar heating system is described 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 to 180/sup 0/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 ad releasing heat for distribution.

Schreyer, J.M.; Dorsey, G.F.

1980-05-16T23:59:59.000Z

8

ARM - Measurement - Radiative heating rate  

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

govMeasurementsRadiative heating rate govMeasurementsRadiative heating rate ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Radiative heating rate The heating rate due to the divergence of long and shortwave radiative flux. Categories Radiometric, Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. External Instruments MOLTS : Model Output Location Time Series Datastreams MOLTS : Model Output Location Time Series Datastreams MOLTSEDASSNDCLASS1 : Model Output Loc. Time Ser. (MOLTS): EDAS

9

Heating Systems  

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

A variety of heating technologies are available today. In addition to heat pumps, which are discussed separately, many homes and buildings use the following approaches:

10

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

11

Energy Basics: Heat Pump Systems  

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

Systems Air-Source Heat Pumps Ductless Mini-Split Heat Pumps Absorption Heat Pumps Geothermal Heat Pumps Supporting Equipment for Heating & Cooling Systems Water Heating Heat...

12

Heat pipe technology development for high temperature space radiator applications  

SciTech Connect

Technology requirements for heat pipe radiators, potentially among the lightest weight systems for space power applications, include flexible elements, and improved specific radiator performance(kg/kW). For these applications a flexible heat pipe capable of continuous operation through an angle of 180/sup 0/ has been demonstrated. The effect of bend angle on the heat pipe temperature distribution is reviewed. An analysis of lightweight membrane heat pipe radiators that use surface tension forces for fluid containment has been conducted. The design analysis of these lightweight heat pipes is described and a potential application in heat rejection systems for space nuclear power plants outlined.

Merrigan, M.A.; Keddy, E.S.; Sena, J.T.; Elder, M.G.

1984-01-01T23:59:59.000Z

13

The Radiative Heating in Underexplored Bands Campaigns  

Science Conference Proceedings (OSTI)

Accurately accounting for radiative energy balance between the incoming solar and the outgoing infrared radiative fluxes is very important in modeling the Earth's climate. Water vapor absorption plays a critical role in the radiative heating rate ...

D. D. Turner; E. J. Mlawer

2010-07-01T23:59:59.000Z

14

Absorption heat pump system  

DOE Patents (OSTI)

The efficiency of an absorption heat pump system is improved by conducting liquid from a second stage evaporator thereof to an auxiliary heat exchanger positioned downstream of a primary heat exchanger in the desorber of the system.

Grossman, Gershon (Oak Ridge, TN)

1984-01-01T23:59:59.000Z

15

Absorption heat pump system  

DOE Patents (OSTI)

The efficiency of an absorption heat pump system is improved by conducting liquid from a second stage evaporator thereof to an auxiliary heat exchanger positioned downstream of a primary heat exchanger in the desorber of the system.

Grossman, G.

1982-06-16T23:59:59.000Z

16

Heat pump system  

DOE Patents (OSTI)

An air heating and cooling system for a building includes an expansion-type refrigeration circuit and a heat engine. 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 heat engine includes a heat rejection circuit having a source of rejected heat and a primary heat exchanger connected to the source of rejected heat. The heat rejection circuit also includes an evaporator in heat exchange relation with the primary heat exchanger, a heat engine indoor heat exchanger, and a heat engine outdoor heat exchanger. The indoor heat exchangers are disposed in series air flow relationship, with the heat engine indoor heat exchanger being disposed downstream from the refrigeration circuit indoor heat exchanger. The outdoor heat exchangers are also disposed in series air flow relationship, with the heat engine outdoor heat exchanger disposed downstream from the refrigeration circuit outdoor heat exchanger. A common fluid is used in both of the indoor heat exchanges and in both of the outdoor heat exchangers. In a first embodiment, the heat engine is a Rankine cycle engine. In a second embodiment, the heat engine is a non-Rankine cycle engine.

Swenson, Paul F. (Cleveland, OH); Moore, Paul B. (Fedhaurn, FL)

1982-01-01T23:59:59.000Z

17

Heat pump system  

DOE Patents (OSTI)

An air heating and cooling system for a building includes an expansion-type refrigeration circuit and a heat engine. 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 heat engine includes a heat rejection circuit having a source of rejected heat and a primary heat exchanger connected to the source of rejected heat. The heat rejection circuit also includes an evaporator in heat exchange relation with the primary heat exchanger, a heat engine indoor heat exchanger, and a heat engine outdoor heat exchanger. The indoor heat exchangers are disposed in series air flow relationship, with the heat engine indoor heat exchanger being disposed downstream from the refrigeration circuit indoor heat exchanger. The outdoor heat exchangers are also disposed in series air flow relationship, with the heat engine outdoor heat exchanger disposed downstream from the refrigeration circuit outdoor heat exchanger. A common fluid is used in both of the indoor heat exchangers and in both of the outdoor heat exchangers. In a first embodiment, the heat engine is a Rankine cycle engine. In a second embodiment, the heat engine is a non-Rankine cycle engine.

Swenson, Paul F. (Cleveland, OH); Moore, Paul B. (Fedhaurn, FL)

1979-01-01T23:59:59.000Z

18

Solid state radiative heat pump  

DOE Patents (OSTI)

A solid state radiative heat pump (10, 50, 70) operable at room temperature (300.degree. K.) utilizes a semiconductor having a gap energy in the range of 0.03-0.25 eV and operated reversibly to produce an excess or deficit of charge carriers as compared to thermal equilibrium. In one form of the invention (10, 70) an infrared semiconductor photodiode (21, 71) is used, with forward or reverse bias, to emit an excess or deficit of infrared radiation. In another form of the invention (50), a homogeneous semiconductor (51) is subjected to orthogonal magnetic and electric fields to emit an excess or deficit of infrared radiation. Three methods of enhancing transmission of radiation through the active surface of the semiconductor are disclosed. In one method, an anti-reflection layer (19) is coated into the active surface (13) of the semiconductor (11), the anti-reflection layer (19) having an index of refraction equal to the square root of that of the semiconductor (11). In the second method, a passive layer (75) is spaced from the active surface (73) of the semiconductor (71) by a submicron vacuum gap, the passive layer having an index of refractive equal to that of the semiconductor. In the third method, a coupler (91) with a paraboloid reflecting surface (92) is in contact with the active surface (13, 53) of the semiconductor (11, 51), the coupler having an index of refraction about the same as that of the semiconductor.

Berdahl, Paul H. (Oakland, CA)

1986-01-01T23:59:59.000Z

19

Solid state radiative heat pump  

DOE Patents (OSTI)

A solid state radiative heat pump operable at room temperature (300 K) utilizes a semiconductor having a gap energy in the range of 0.03-0.25 eV and operated reversibly to produce an excess or deficit of change carriers as compared equilibrium. In one form of the invention an infrared semiconductor photodiode is used, with forward or reverse bias, to emit an excess or deficit of infrared radiation. In another form of the invention, a homogenous semiconductor is subjected to orthogonal magnetic and electric fields to emit an excess or deficit of infrared radiation. Three methods of enhancing transmission of radiation the active surface of the semiconductor are disclosed. In one method, an anti-refection layer is coated into the active surface of the semiconductor, the anti-reflection layer having an index of refraction equal to the square root of that of the semiconductor. In the second method, a passive layer is speaced trom the active surface of the semiconductor by a submicron vacuum gap, the passive layer having an index of refractive equal to that of the semiconductor. In the third method, a coupler with a paraboloid reflecting surface surface is in contact with the active surface of the semiconductor, the coupler having an index of refraction about the same as that of the semiconductor.

Berdahl, P.H.

1984-09-28T23:59:59.000Z

20

Energy Basics: Heating Systems  

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

of energy sources, including electricity, boilers, solar energy, and wood and pellet-fuel heating. Small Space Heaters Used when the main heating system is inadequate or when...

Note: This page contains sample records for the topic "radiator heating systems" 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

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.

22

Heat radiation from long cylindrical objects  

E-Print Network (OSTI)

The heat radiated by objects smaller than or comparable in size to the thermal wavelength can be very different from the classical blackbody radiation as described by the Planck and Stefan-Boltzmann laws. We use methods ...

Golyk, Vladyslav A.

23

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

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

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

24

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

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

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

25

Laundry heat recovery system  

SciTech Connect

A laundry heat recovery system includes a heat exchanger associated with each dryer in the system, the heat exchanger being positioned within the exhaust system of the dryer. A controller responsive to the water temperature of the heat exchangers and the water storage for the washer selectively circulates the water through a closed loop system whereby the water within the exchangers is preheated by the associated dryers. By venting the exhaust air through the heat exchanger, the air is dehumidified to permit recirculation of the heated air into the dryer.

Alio, P.

1985-04-09T23:59:59.000Z

26

Radiative heat transfer between dielectric bodies  

E-Print Network (OSTI)

The recent development of a scanning thermal microscope (SThM) has led to measurements of radiative heat transfer between a heated sensor and a cooled sample down to the nanometer range. This allows for comparision of the known theoretical description of radiative heat transfer, which is based on fluctuating electrodynamics, with experiment. The theory itself is a macroscopic theory, which can be expected to break down at distances much smaller than 10-8m. Against this background it seems to be reasonable to revisit the known macroscopic theory of fluctuating electrodynamics and of radiative heat transfer.

Svend-Age Biehs

2011-03-16T23:59:59.000Z

27

Long titanium heat pipes for high-temperature space radiators  

SciTech Connect

Titanium heat pipes are being developed to provide light weight, reliable heat rejection devices as an alternate radiator design for the Space Reactor Power System (SP-100). The radiator design includes 360 heat pipes, each of which is 5.2 m long and dissipates 3 kW of power at 775 K. The radiator heat pipes use potassium as the working fluid, have two screen arteries for fluid return, a roughened surface distributive wicking system, and a D-shaped cross-section container configuration. A prototype titanium heat pipe, 5.5-m long, has been fabricated and tested in space-simulating conditions. Results from startup and isothermal operation tests are presented. These results are also compared to theoretical performance predictions that were used to design the heat pipe initially.

Girrens, S.P.; Ernst, D.M.

1982-01-01T23:59:59.000Z

28

Absorption heat pump system  

DOE Patents (OSTI)

An improvement in an absorption heat pump cycle is obtained by adding adiabatic absorption and desorption steps to the absorber and desorber of the system. The adiabatic processes make it possible to obtain the highest temperature in the absorber before any heat is removed from it and the lowest temperature in the desorber before heat is added to it, allowing for efficient utilization of the thermodynamic availability of the heat supply stream. The improved system can operate with a larger difference between high and low working fluid concentrations, less circulation losses, and more efficient heat exchange than a conventional system.

Grossman, Gershon (Oak Ridge, TN); Perez-Blanco, Horacio (Knoxville, TN)

1984-01-01T23:59:59.000Z

29

Heat transfer system  

DOE Patents (OSTI)

A heat transfer system for a nuclear reactor is described. 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.

Not Available

1980-03-07T23:59:59.000Z

30

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

31

Heat pipe radiation cooling evaluation: Task 2 concept studies report  

SciTech Connect

This report presents the result of Task 2, Concept Studies for Heat Pipe Radiation Cooling (HPRC), which was performed for Los Alamos National Laboratory under Contract 9-XT1-U9567. Studies under a prior contract defined a reference HPRC conceptual design for hypersonic aircraft engines operating at Mach 5 and an altitude of 80,000 ft. Task 2 involves the further investigation of heat pipe radiation cooling (HPRC) systems for additional design and operating conditions.

Silverstein, C.C.

1991-10-01T23:59:59.000Z

32

Heating systems for heating subsurface formations  

Science Conference Proceedings (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

33

Radiative Heat Transfer between Neighboring Particles  

E-Print Network (OSTI)

The near-field interaction between two neighboring particles is known to produce enhanced radiative heat transfer. We advance in the understanding of this phenomenon by including the full electromagnetic particle response, heat exchange with the environment, and important radiative corrections both in the distance dependence of the fields and in the particle absorption coefficients. We find that crossed terms of electric and magnetic interactions dominate the transfer rate between gold and SiC particles, whereas radiative corrections reduce it by several orders of magnitude even at small separations. Radiation away from the dimer can be strongly suppressed or enhanced at low and high temperatures, respectively. These effects must be taken into account for an accurate description of radiative heat transfer in nanostructured environments.

Alejandro Manjavacas; F. Javier Garcia de Abajo

2012-01-26T23:59:59.000Z

34

Radiative Heating Rates for Saharan Dust  

Science Conference Proceedings (OSTI)

A combined longwave and shortwave radiative transfer model was used to determine effects of Saharan dust on the radiative fluxes and heating/cooling rates in the atmosphere. Cases are treated for cloud-free and overcast conditions over the ocean ...

Toby N. Carlson; Stanley G. Benjamin

1980-01-01T23:59:59.000Z

35

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

36

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. (Cleveland, OH); Moore, Paul B. (Fedhaven, FL)

1977-01-01T23:59:59.000Z

37

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

38

Hybrid Radiator-Cooling System  

Technology Development & Commercialization Current Challenges Coolant radiators in highway trucks are designed to transfer maximum heat at a ...

39

Northeast Home Heating Oil Reserve System Heating Oil, PIA Office...  

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

Northeast Home Heating Oil Reserve System Heating Oil, PIA Office of Fossil Energy Headquaters Northeast Home Heating Oil Reserve System Heating Oil, PIA Office of Fossil Energy...

40

Home heating system  

SciTech Connect

A home heating system is disclosed that has a furnace with a combustion chamber for burning fuel and creating heat, and a chimney with a draft therein. An improvement is described that has an exhaust flue connected between the combustion chamber and the chimney for venting heated exhaust products from the furnace, a heat reclaimer connected into the exhaust flue between the combustion chamber and the chimney for reclaiming heat from the heated exhaust product, and an outside air line for supplying air from the outside of the house to the combustion chamber. A first flue portion of the exhaust flue is connected between the combustion chamber and the heat reclaimer, and a second insulated flue portion of the exhaust flue is connected between the heat reclaimer and the chimney. An outside air by-pass or balancing line is connected between the outside air line and the chimney for satisfying the chimney suction at flame-out. A flow sensing and regulating device may be connected into the outside air line for regulating the flow or air so that outside air is supplied to the furnace only when fuel is burned therein.

Bellaff, L.

1980-03-25T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

Feedbacks between Eddy Heat Fluxes and Radiative Heating in an Energy-Balance Model  

Science Conference Proceedings (OSTI)

The response of midlatitude temperature structure to changes in radiative forcing is examined in an analytical energy-balance model that includes parameterized eddy heat fluxes and linear radiative heating. The characteristics of heat-...

Lee E. Branscome; Enda O'Brien

1988-02-01T23:59:59.000Z

42

Feasibility of night-sky radiation with heat pumps  

DOE Green Energy (OSTI)

This report presents the procedure involved in the determination of the feasibility of high-sky radiation as the means of rejecting heat through solar collectors for a sample residential house in the Evansville area. It presents conclusions on different types of coatings that are used on solar collectors. It also designs the system, and its backup, in schematic form. For the purpose of cost analysis it discusses the difference of a cooling tower and night-sky radiation.

McKinney, T.G.

1982-01-01T23:59:59.000Z

43

Heat transport system  

DOE Patents (OSTI)

A falling bed of ceramic particles receives neutron irradiation from a neutron-producing plasma and thereby transports energy as heat from the plasma to a heat exchange location where the ceramic particles are cooled by a gas flow. The cooled ceramic particles are elevated to a location from which they may again pass by gravity through the region where they are exposed to neutron radiation. Ceramic particles of alumina, magnesia, silica and combinations of these materials are contemplated as high-temperature materials that will accept energy from neutron irradiation. Separate containers of material incorporating lithium are exposed to the neutron flux for the breeding of tritium that may subsequently be used in neutron-producing reactions. The falling bed of ceramic particles includes velocity partitioning between compartments near to the neutron-producing plasma and compartments away from the plasma to moderate the maximum temperature in the bed.

Harkness, Samuel D. (McMurray, PA)

1982-01-01T23:59:59.000Z

44

Radiative Heating in Underexplored Bands Campaign (RHUBC)  

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

Bands Campaign (RHUBC) D. Turner and E. Mlawer RHUBC Breakout Session 2008 ARM Science Team Meeting 13 March, 2008 Norfolk, Virginia Motivation * Radiative heating/cooling in the mid-troposphere modulate the vertical motions of the atmosphere - This heating/cooling occurs primarily in water vapor absorption bands that are opaque at the surface * Approximately 40% of the OLR comes from the far-IR * Until recently, the observational tools were not available to evaluate the accuracy of the far-IR radiative transfer models - Spectrally resolved far-IR radiances, accurate PWV * Need to validate both clear sky (WV) absorption and cirrus scattering properties in these normally opaque bands Scientific Objectives * Conduct clear sky radiative closure studies in order to reduce uncertainties

45

Radiation detection system  

DOE Patents (OSTI)

A radiation detection system which utilizes the generation of Cerenkov light in and the transmission of that light longitudinally through fiber optic wave guides in order to transmit intelligence relating to the radiation to a remote location. The wave guides are aligned with respect to charged particle radiation so that the Cerenkov light, which is generated at an angle to the radiation, is accepted by the fiber for transmission therethrough. The Cerenkov radiation is detected, recorded, and analyzed at the other end of the fiber.

Nelson, Melvin A. (Santa Barbara, CA); Davies, Terence J. (Santa Barbara, CA); Morton, III, John R. (Livermore, CA)

1976-01-01T23:59:59.000Z

46

Radiation detection system  

SciTech Connect

A radiation detection system including a radiation-to-light converter and fiber optic wave guides to transmit the light to a remote location for processing. The system utilizes fluors particularly developed for use with optical fibers emitting at wavelengths greater than about 500 nm and having decay times less than about 10 ns.

Franks, Larry A. (Santa Barbara, CA); Lutz, Stephen S. (Santa Barbara, CA); Lyons, Peter B. (Los Alamos, NM)

1981-01-01T23:59:59.000Z

47

Heat transport system  

DOE Patents (OSTI)

A heat transport system of small size which can be operated in any orientation consists of a coolant loop containing a vaporizable liquid as working fluid and includes in series a vaporizer, a condenser and two one-way valves and a pressurizer connected to the loop between the two valves. The pressurizer may be divided into two chambers by a flexible diaphragm, an inert gas in one chamber acting as a pneumatic spring for the system.

Pierce, Bill L. (Pittsburgh, PA)

1978-01-01T23:59:59.000Z

48

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

49

Cooperative heat transfer and ground coupled storage system  

DOE Patents (OSTI)

A cooperative heat transfer and ground coupled storage system wherein collected solar heat energy is ground stored and permitted to radiate into the adjacent ground for storage therein over an extended period of time when such heat energy is seasonally maximally available. Thereafter, when said heat energy is seasonally minimally available and has propagated through the adjacent ground a substantial distance, the stored heat energy may be retrieved by a circumferentially arranged heat transfer means having a high rate of heat transfer.

Metz, Philip D. (Rocky Point, NY)

1982-01-01T23:59:59.000Z

50

Geothermal district heating systems  

DOE Green Energy (OSTI)

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

51

Hybrid Geothermal Heat Pump Systems  

Science Conference Proceedings (OSTI)

Hybrid geothermal heat pump systems offer many of the benefits of full geothermal systems but at lower installed costs. A hybrid geothermal system combines elements of a conventional water loop heat pump system in order to reduce the geothermal loop heat exchanger costs, which are probably the largest cost element of a geothermal system. These hybrid systems have been used successfully where sufficient ground space to install large heat exchangers for full geothermal options was unavailable, or where the...

2009-12-21T23:59:59.000Z

52

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

53

Heat Pump Systems  

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

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...

54

Heat pipe system  

SciTech Connect

A heat pipe diode device for transferring heat from a heat source component to a heat sink wall is described. It contains a heat pipe body member attached to the best source; the heat source having a wall forming at least a portion of the normal evaporator section of the heat pipe diode; a working fluid within the body member; a cover for the heat pipe diode forming at least a portion of the heat sink wall; the cover forming the normal condenser for the heat pipe diode; a wick connected between the condenser and the evaporator of the heat pipe diode; means for retaining the wick adjacent the heat pipe wall; a wick support plate adjacent to the cover; the wick being attached to the support plate; means for holding the wick in contact with the cover; and means, responsive to excessive temperatures at the heat sink wall, for moving the support plate and a portion of the wick away from the cover to thereby substantially reduce heat flow in the reverse direction through said heat pipe diode device.

Kroebig, H.L.; Riha, F.J. III

1974-12-03T23:59:59.000Z

55

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 the different forms of heating systems suited for single household metering. We introduce especially the single house horizontal spanning system and show how to select the heat flow rate of the radiator. We also study the distribution rule of the heat intermedium of horizontal heating system. To simplify the workload of engineering process and make the design more accurate, a new method for calculating the average temperature of the intermedium and the heat flow rate of this heating system is put forward. Comparison is also made between the system in question and the heating system in series. A few important questions are raised and discussed, such as the computation of combining different forms of radiators, the verification of the pipe radiation, the end of the radiator without spanning pipe, and the selection of the pipe diameter. At the same time, we study the influence of the horizontal heating system on the whole heating network, describe the characteristics of a single household horizontal heating system and the importance of its hydraulic computation, and analyze the influence of the gravitational head to this heating system. We also study the hydraulic condition of the single house horizontal system and the relationship of each party under the adjustment. In addition, the operation of single household horizontal heating system is verified in a real project, and its reliability is testified. This paper provides a method for further research on related issues of a single household metering heating system and is valuable for design, operation and management.

Hang, Y.; Ying, D.

2006-01-01T23:59:59.000Z

56

Modelling of a passive reactor cavity cooling system (RCCS) for a nuclear reactor core subject to environmental changes and the optimisation of the RCCS radiation heat shield heat shield.  

E-Print Network (OSTI)

??ENGLISH ABSTRACT: A reactor cavity cooling system (RCCS) is used in the PBMR to protect the concrete citadel surrounding the reactor from direct nuclear radiation (more)

Verwey, Aldo

2010-01-01T23:59:59.000Z

57

Rainfall and Radiative Heating Rates from TOGA COARE Atmospheric Budgets  

Science Conference Proceedings (OSTI)

Atmospheric heat and moisture budgets are used to determine rainfall and radiative heating rates over the western Pacific warm pool during the Tropical Ocean Global Atmosphere Coupled OceanAtmosphere Response Experiment (TOGA COARE). Results are ...

Richard H. Johnson; Paul E. Ciesielski

2000-05-01T23:59:59.000Z

58

Absorption-heat-pump system  

DOE Patents (OSTI)

An improvement in an absorption heat pump cycle is obtained by adding adiabatic absorption and desorption steps to the absorber and desorber of the system. The adiabatic processes make it possible to obtain the highest temperature in the absorber before any heat is removed from it and the lowest temperature in the desorber before heat is added to it, allowing for efficient utilization of the thermodynamic availability of the heat supply stream. The improved system can operate with a larger difference between high and low working fluid concentrations, less circulation losses, and more efficient heat exchange than a conventional system.

Grossman, G.; Perez-Blanco, H.

1983-06-16T23:59:59.000Z

59

Radiation delivery system and method  

DOE Patents (OSTI)

A radiation delivery system and method are described. The system includes a treatment configuration such as a stent, balloon catheter, wire, ribbon, or the like, a portion of which is covered with a gold layer. Chemisorbed to the gold layer is a radiation-emitting self-assembled monolayer or a radiation-emitting polymer. The radiation delivery system is compatible with medical catheter-based technologies to provide a therapeutic dose of radiation to a lesion following an angioplasty procedure.

Sorensen, Scott A. (Overland Park, KS); Robison, Thomas W. (Los Alamos, NM); Taylor, Craig M. V. (Jemez Springs, NM)

2002-01-01T23:59:59.000Z

60

Process Heating Systems Optimization Workshop  

Science Conference Proceedings (OSTI)

Mar 1, 2003 ... PROCESS HEATING SYSTEMS OPTIMIZATION WORKSHOP. In cooperation with the U.S. Department of Energy, Office of Energy Efficiency...

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


61

CRBRP decay heat removal systems  

SciTech Connect

The Decay Heat Removal Systems for the Clinch River Breeder Reactor Plant (CRBRP) are designed to adequately remove sensible and decay heat from the reactor following normal shutdown, operational occurrences, and postulated accidents on both a short term and a long term basis. The Decay Heat Removal Systems are composed of the Main Heat Transport System, the Main Condenser and Feedwater System, the Steam Generator Auxiliary Heat Removal System (SGAHRS), and the Direct Heat Removal Service (DHRS). The overall design of the CRBRP Decay Heat Removal Systems and the operation under normal and off-normal conditions is examined. The redundancies of the system design, such as the four decay heat removal paths, the emergency diesel power supplies, and the auxiliary feedwater pumps, and the diversities of the design such as forced circulation/natural circulation and AC Power/DC Power are presented. In addition to overall design and system capabilities, the detailed designs for the Protected Air Cooled Condensers (PACC) and the Air Blast Heat Exchangers (ABHX) are presented.

Hottel, R.E.; Louison, R.; Boardman, C.E.; Kiley, M.J.

1977-01-01T23:59:59.000Z

62

Influence of Infrared Radiation on Attic Heat Transfer  

E-Print Network (OSTI)

An experimental study concerned with different modes of heal transfer in fibrous and cellulose insulating material is presented. A series of experiments were conducted using an attic simulator to determine the effects of ventilation on attic heat transfer, and the effect of infrared radiation on the thermal conductivity of the insulation system and on attic heat transfer. All the tests were performed at steady state conditions by controlling the roof deck temperature. Calculations are performed for insulation thicknesses between 1 inch (2.54cm) and 6.0 inches (15.24cm) and roof deck temperatures between 145F (62.78C) and 100F (36.78C). The temperature profiles within the insulation were measured by placing thermocouples at various levels within the insulation. The profiles for the cellulose insulation are linear. The profiles within the glass fiber insulation are non-linear due to the effect of infrared radiation. Also heat fluxes were measured through different insulation thicknesses and for different roof temperatures. It was found that a radiant barrier such as aluminum foil can reduce the heat flux significantly. Experimental results were compared to a Three-Region approximate solution developed at Oak Ridge National Laboratories (ORNL). The model was in good agreement with experimental results.

Katipamula, S.; Turner, W. D.; Murphy, W. E.; O'Neal, D. L.

1985-01-01T23:59:59.000Z

63

Passive-solar directional-radiating cooling system  

DOE Patents (OSTI)

A radiative cooling system for use with an ice-making system having a radiating surface aimed at the sky for radiating energy at one or more wavelength bands for which the atmosphere is transparent and a cover thermally isolated from the radiating surface and transparent at least to the selected wavelength or wavelengths, the thermal isolation reducing the formation of condensation on the radiating surface and/or cover and permitting the radiation to continue when the radiating surface is below the dewpoint of the atmosphere, and a housing supporting the radiating surface, cover and heat transfer means to an ice storage reservoir.

Hull, J.R.; Schertz, W.W.

1985-06-27T23:59:59.000Z

64

Passive-solar directional-radiating cooling system  

DOE Patents (OSTI)

A radiative cooling system for use with an ice-making system having a radiating surface aimed at the sky for radiating energy at one or more wavelength bands for which the atmosphere is transparent and a cover thermally isolated from the radiating surface and transparent at least to the selected wavelength or wavelengths, the thermal isolation reducing the formation of condensation on the radiating surface and/or cover and permitting the radiation to continue when the radiating surface is below the dewpoint of the atmosphere, and a housing supporting the radiating surface, cover and heat transfer means to an ice storage reservoir.

Hull, John R. (Hinsdale, IL); Schertz, William W. (Batavia, IL)

1986-01-01T23:59:59.000Z

65

RADIATION DETECTOR SYSTEM  

DOE Patents (OSTI)

This patent relates to radiation detection devices and presents a unique detection system especialiy desirable for portable type instruments using a Geiger-Mueller for a high voltage battery, thereby reducing the size and weight of the instrument, by arranging a one-shot multivibrator to recharge a capacitance applying operating potential to tho Geiger-Mueller tube each time a nuclear particle is detected. When detection occurs, the multivibrator further delivers a pulse to an appropriate indicator doing away with the necessity for the pulse amplifier conventionally intermediate between the detector and indicator in pulse detection systems.

Gundlach, J.C.; Kelley, G.G.

1958-02-25T23:59:59.000Z

66

Stirling engine heating system  

SciTech Connect

A hot gas engine is described wherein a working gas flows back and forth in a closed path between a relatively cooler compression cylinder side of the engine and a relatively hotter expansion cylinder side of the engine and the path contains means including a heat source and a heat sink acting upon the gas in cooperation with the compression and expansion cylinders to cause the gas to execute a thermodynamic cycle wherein useful mechanical output power is developed by the engine, the improvement in the heat source which comprises a plurality of individual tubes each forming a portion of the closed path for the working gas.

Johansson, L.N.; Houtman, W.H.; Percival, W.H.

1988-06-28T23:59:59.000Z

67

Trace formulas for nonequilibrium Casimir interactions, heat radiation, and heat transfer for arbitrary objects  

E-Print Network (OSTI)

We present a detailed derivation of heat radiation, heat transfer, and (Casimir) interactions for N arbitrary objects in the framework of fluctuational electrodynamics in thermal nonequilibrium. The results can be expressed ...

Bimonte, Giuseppe

68

Diurnal Covariation in Soil Heat Flux and Net Radiation  

Science Conference Proceedings (OSTI)

Diurnal variation in soil heat flux is a key constraint on the amount of energy available for sensible and latent heating of the lower troposphere. Many studies have demonstrated that soil heat flux G is strongly correlated with net radiation Rn. ...

Joseph A. Santanello Jr.; Mark A. Friedl

2003-06-01T23:59:59.000Z

69

Reduce Radiation Losses from Heating Equipment  

Science Conference Proceedings (OSTI)

This DOE Industrial Technologies Program tip sheet describes how to save energy and costs by reducing expensive heat losses from industrial heating equipment, such as furnaces.

Not Available

2006-01-01T23:59:59.000Z

70

Efficient Phase-Change Materials: Development of a Low-Cost Thermal Energy Storage System Using Phase-Change Materials with Enhanced Radiation Heat Transfer  

Science Conference Proceedings (OSTI)

HEATS Project: USF is developing low-cost, high-temperature phase-change materials (PCMs) for use in thermal energy storage systems. Heat storage materials are critical to the energy storage process. In solar thermal storage systems, heat can be stored in these materials during the day and released at nightwhen the sun is not outto drive a turbine and produce electricity. In nuclear storage systems, heat can be stored in these materials at night and released to produce electricity during daytime peak-demand hours. Most PCMs do not conduct heat very well. Using an innovative, electroless encapsulation technique, USF is enhancing the heat transfer capability of its PCMs. The inner walls of the capsules will be lined with a corrosion-resistant, high-infrared emissivity coating, and the absorptivity of the PCM will be controlled with the addition of nano-sized particles. USFs PCMs remain stable at temperatures from 600 to 1,000C and can be used for solar thermal power storage, nuclear thermal power storage, and other applications.

None

2011-12-05T23:59:59.000Z

71

Heat Transfer Fluids for Solar Water Heating Systems | Department...  

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

exchanger. | Photo from iStockphoto.com Heat Exchangers for Solar Water Heating Systems Rooftop solar water heaters need regular maintenance to operate at peak efficiency. |...

72

First university owned district heating system using biomass heat  

E-Print Network (OSTI)

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

Northern British Columbia, University of

73

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

74

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

75

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

76

Radiative Heating and Cooling Rates in the Middle Atmosphere  

Science Conference Proceedings (OSTI)

One of the limitations to the accurate calculation of radiative heating and cooling rates in the stratosphere and mesosphere has been the lack of accurate data on the atmospheric temperature and composition. Data from the LIMS experiment on ...

John C. Gille; Lawrence V. Lyjak

1986-10-01T23:59:59.000Z

77

Sensitivity of Radiative Fluxes and Heating Rates to Cloud Microphysics  

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

Sensitivity of Radiative Fluxes and Heating Sensitivity of Radiative Fluxes and Heating Rates to Cloud Microphysics S. F. Iacobellis and R. C. J. Somerville Scripps Institution of Oceanography University of California, San Diego La Jolla, California G. M. McFarquhar University of Illinois at Urbana-Champaign Urbana, Illinois D. L. Mitchell Desert Research Institute Reno, Nevada Introduction A single-column model (SCM) is used to examine the sensitivity of basic quantities such as atmospheric radiative heating rates and surface and top of atmosphere (TOA) radiative fluxes to various parameter- izations of clouds and cloud microphysics. The SCM was run at the Atmospheric Radiation Measurement (ARM) Program's Southern Great Plains (SGP), Tropical Western Pacific (TWP), and North Slope of Alaska (NSA) sites using forcing data derived from forecast products. The forecast

78

Design considerations for a thermophotovoltaic energy converter using heat pipe radiators  

DOE Green Energy (OSTI)

The purpose of this paper is to discuss concepts for using high temperature heat pipes to transport energy from a heat source to a thermophotovoltaic (TPV) converter. Within the converter, the condenser portion of each heat pipe acts as a photon radiator, providing a radiant flux to adjacent TPV cells, which in turn create electricity. Using heat pipes in this way could help to increase the power output and the power density of TPV systems. TPV systems with radiator temperatures in the range of 1,500 K are expected to produce as much as 3.6 W/cm{sup 3} of heat exchanger volume at an efficiency of 20% or greater. Four different arrangements of heat pipe-TPV energy converters are considered. Performance and sizing calculations for each of the concepts are presented. Finally, concerns with this concept and issues which remain to be considered are discussed.

Ashcroft, J.; DePoy, D. [Lockheed Martin Corp., Schenectady, NY (United States)

1997-06-01T23:59:59.000Z

79

Commercial laundry heat recovery system  

SciTech Connect

Waste water of above ambient temperature in a commercial laundry is directed through a self-cleaning plate and frame heat exchanger to heat incoming fresh water. Some of the fresh water heated to a first temperature is directed to a cold water storage tank to raise the water therein above ambient temperature which results in substantially lessened downstream requirements for heat input with commensurate cost reductions. The remainder of the fresh water is heated to a higher second temperature and is directed to a hot water storage tank. A system of valves regulates the temperature of the water flowing into each of the hot and cold water storage tanks to maintain a preset temperature in each of the storage tanks.

Kaufmann, R.O.

1983-02-15T23:59:59.000Z

80

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.

Note: This page contains sample records for the topic "radiator heating systems" 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

Design and demonstration of a high-temperature, deployable, membrane heat-pipe radiator element  

SciTech Connect

Demonstration of a high-temperature, deployable, membrane heat-pipe radiator element has been conducted. Membrane heat pipes offer the potential for compact storage, ease of transportation, self-deployment, and a high specific radiator performance (kg/kW) for use in thermal reflection systems of space nuclear power plants. A demonstration heat pipe 8-cm wide and 100-cm long was fabricated. The heat pipe containment and wick structure were made of stainless steel and sodium used as the working fluid. The tests demonstrated passive deployment of the high-temperature membrane radiator, simulating a single segment in a flat array, at a temperature of 800 K. Details of test procedures and results of the tests are presented in this paper together with a discussion of the design and development of a full-scale, segmented high-temperature, deployable membrane heat pipe. 5 refs., 7 figs.

Trujillo, V.L.; Keddy, E.S.; Merrigan, M.A.

1989-01-01T23:59:59.000Z

82

Enhanced radiative heat transfer between nanostructured gold plates  

E-Print Network (OSTI)

We compute the radiative heat transfer between nanostructured gold plates in the framework of the scattering theory. We predict an enhancement of the heat transfer as we increase the depth of the corrugations while keeping the distance of closest approach fixed. We interpret this effect in terms of the evolution of plasmonic and guided modes as a function of the grating's geometry.

R. Gurout; J. Lussange; F. S. S. Rosa; J. -P. Hugonin; D. A. R. Dalvit; J. -J. Greffet; A. Lambrecht; S. Reynaud

2012-03-07T23:59:59.000Z

83

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

84

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.

Chen, Fang C. (Knoxville, TN); Mei, Viung C. (Oak Ridge, TN); Murphy, Richard W. (Knoxville, TN)

1998-01-01T23:59:59.000Z

85

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

86

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

87

Trace formulae for non-equilibrium Casimir interactions, heat radiation and heat transfer for arbitrary objects  

E-Print Network (OSTI)

We present a detailed derivation of heat radiation, heat transfer and (Casimir) interactions for N arbitrary objects in the framework of fluctuational electrodynamics in thermal non-equilibrium. The results can be expressed as basis-independent trace formulae in terms of the scattering operators of the individual objects. We prove that heat radiation of a single object is positive, and that heat transfer (for two arbitrary passive objects) is from the hotter to a colder body. The heat transferred is also symmetric, exactly reversed if the two temperatures are exchanged. Introducing partial wave-expansions, we transform the results for radiation, transfer and forces into traces of matrices that can be evaluated in any basis, analogous to the equilibrium Casimir force. The method is illustrated by (re)deriving the heat radiation of a plate, a sphere and a cylinder. We analyze the radiation of a sphere for different materials, emphasizing that a simplification often employed for metallic nano-spheres is typically invalid. We derive asymptotic formulae for heat transfer and non-equilibrium interactions for the cases of a sphere in front a plate and for two spheres, extending previous results. As an example, we show that a hot nano-sphere can levitate above a plate with the repulsive non-equilibrium force overcoming gravity -- an effect that is not due to radiation pressure.

Matthias Krger; Giuseppe Bimonte; Thorsten Emig; Mehran Kardar

2012-07-02T23:59:59.000Z

88

Study of Hybrid Geothermal Heat Pump Systems  

Science Conference Proceedings (OSTI)

Hybrid Ground Source Heat Pump systems often combine a traditional geothermal system with either a cooling tower or fluid cooler for heat rejection and a boiler or solar heat collector for heat addition to the loop. These systems offer the same energy efficiency benefits as full geothermal systems to utilities and their customers but at a potentially lower first cost. Many hybrid systems have materialized to resolve heat buildup in full geothermal system loops where loop temperatures continue to rise as ...

2010-12-06T23:59:59.000Z

89

Approximations for radiative cooling and heating in the solar chromosphere  

E-Print Network (OSTI)

Context. The radiative energy balance in the solar chromosphere is dominated by strong spectral lines that are formed out of LTE. It is computationally prohibitive to solve the full equations of radiative transfer and statistical equilibrium in 3D time dependent MHD simulations. Aims. To find simple recipes to compute the radiative energy balance in the dominant lines under solar chromospheric conditions. Methods. We use detailed calculations in time-dependent and 2D MHD snapshots to derive empirical formulae for the radiative cooling and heating. Results. The radiative cooling in neutral hydrogen lines and the Lyman continuum, the H and K and intrared triplet lines of singly ionized calcium and the h and k lines of singly ionized magnesium can be written as a product of an optically thin emission (dependent on temperature), an escape probability (dependent on column mass) and an ionization fraction (dependent on temperature). In the cool pockets of the chromosphere the same transitions contribute to the heat...

Carlsson, Mats

2012-01-01T23:59:59.000Z

90

PREDICTING THE TIME RESPONSE OF A BUILDING UNDER HEAT INPUT CONDITIONS FOR ACTIVE SOLAR HEATING SYSTEMS  

E-Print Network (OSTI)

solar space heating system with heat input and building loadBUILDING UNDER HEAT INPUT CONDITIONS FOR ACTIVE SOLAR HEATINGBUILDING UNDER HEAT INPUT CONDITIONS FOR ACTIVE SOLAR HEATING

Warren, Mashuri L.

2013-01-01T23:59:59.000Z

91

Tabulation of Fundamental Assembly Heat and Radiation Source Files  

Science Conference Proceedings (OSTI)

The purpose of this calculation is to tabulate a set of computer files for use as input to the WPLOAD thermal loading software. These files contain details regarding heat and radiation from pressurized water reactor (PWR) assemblies and boiling water reactor (BWR) assemblies. The scope of this calculation is limited to rearranging and reducing the existing file information into a more streamlined set of tables for use as input to WPLOAD. The electronic source term files used as input to this calculation were generated from the output files of the SAS2H/ORIGIN-S sequence of the SCALE Version 4.3 modular code system, as documented in References 2.1.1 and 2.1.2, and are included in Attachment II.

T. deBues; J.C. Ryman

2006-10-25T23:59:59.000Z

92

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

93

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

l U CONTROL SYSTEM FOR SOLAR HEATING AND COOLING* M.Wahlig,be capable of operating solar heating and cooling systemsand now transferred to ERDA, on solar heating and cooling of

Dols, C.

2010-01-01T23:59:59.000Z

94

Radiation Inspection System Lab (RISL) | ORNL  

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

Radiation Inspection System Lab May 30, 2013 This team has the background and experience to test and optimize radiation detection systems from handheld background survey meters to...

95

Vapor phase heat transport systems  

DOE Green Energy (OSTI)

Vapor phase heat-transport systems are being tested in two of the passive test cells at Los Alamos. The systems consist of an active fin-and-tube solar collector and a condenser inside a water storage tank. The refrigerant, R-11, can be returned to the collector by a pump or by a self-pumping scheme. In one of the test cells the liquid was self-pumped to the roof-mounted collector 17 ft above the condenser. A mechanical valve was designed and tested that showed that the system could operate in a completely passive mode. Performance comparisons have been made with a passive water wall test cell.

Hedstrom, J.C.

1984-01-01T23:59:59.000Z

96

Enhancement of heat transfer for ground source heat pump systems.  

E-Print Network (OSTI)

??Uptake of geothermal heat pump (GSHP) systems has been slow in some parts of the world due to the unpredictable operational performance, large installation space (more)

Mori, Hiromi

2010-01-01T23:59:59.000Z

97

Energy Basics: Heat Pump Systems  

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

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...

98

Comparison of natural convection heat exchangers for solar water heating systems  

DOE Green Energy (OSTI)

Thermosyphon heat exchangers are used in indirect solar water heating systems to avoid using a pump to circulate water from the storage tank to the heat exchanger. In this study, the authors consider the effect of heat exchanger design on system performance. They also compare performance of a system with thermosyphon flow to the same system with a 40W pump in the water loop. In the first part of the study, the authors consider the impact of heat exchanger design on the thermal performance of both one- and two-collector solar water heaters. The comparison is based on Solar Rating and Certification Corporation (SRCC) OG300 simulations. The thermosyphon heat exchangers considered are (1) a one-pass, double wall, 0.22 m{sup 2}, four tube-in-shell heat exchanger manufactured by AAA Service and Supply, Inc., (the Quad-Rod); (2) a two-pass, double wall, 0.2 m{sup 2}, tube-in-shell made by Heliodyne, Inc., but not intended for commercial development; (3) a one-pass, single wall, 0.28 m{sup 2}, 31 tube-in-shell heat exchanger from Young Radiator Company, and (4) a one-pass single-wall, 0.61 m{sup 2}, four coil-in-shell heat exchanger made by ThermoDynamics Ltd. The authors compare performance of the systems with thermosyphon heat exchangers to a system with a 40 W pump used with the Quad-Rod heat exchanger. In the second part of the study, the effects of reducing frictional losses through the heat exchanger and/or the pipes connecting the heat exchanger to the storage tank, and increasing heat transfer area are evaluated in terms of OG300 ratings.

Davidson, J.; Liu, W.

1998-09-15T23:59:59.000Z

99

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

E-Print Network (OSTI)

??In bachelors 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

100

Heat Storage Within the Earth System  

Science Conference Proceedings (OSTI)

Observations of the earth's heat budget provide a real-world constraint on the radiative forcing which is simulated in global climate change models. Assessments, such as the IPCC, would more effectively depict changes over time in the climate ...

Roger A. Pielke Sr.

2003-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

A mesoscopic description of radiative heat transfer at the nanoscale  

E-Print Network (OSTI)

We present a formulation of the nanoscale radiative heat transfer (RHT) using concepts of mesoscopic physics. We introduce the analog of the Sharvin conductance using the quantum of thermal conductance. The formalism provides a convenient framework to analyse the physics of RHT at the nanoscale. Finally, we propose a RHT experiment in the regime of quantized conductance.

Svend-Age Biehs; Emmanuel Rousseau; Jean-Jacques Greffet

2011-03-11T23:59:59.000Z

102

RADIATION DETECTING AND TELEMETERING SYSTEM  

DOE Patents (OSTI)

A system is presented for measuring ionizing radiation at several remote stations and transmitting the measured information by radio to a central station. At each remote station a signal proportioned to the counting rate is applied across an electrical condenser made of ferroelectric material. The voltage across the condenser will vary as a function of the incident radiation and the capacitance of the condenser will vary accordingly. This change in capacitance is used to change the frequency of a crystalcontrolled oscillator. The output of the oscillator is coupled to an antenna for transmitting a signal proportional to the incident radiation.

Richards, H.K.

1959-12-15T23:59:59.000Z

103

Commercial laundry heat recovery system  

SciTech Connect

In a commercial laundry that is connected to a source of fresh water and generates heated waste water, a method is described for recovering heat from the heated waste comprising the steps of: (a) pumping the heated waste water through a heat exchanger; (b) introducing fresh water into the heat exchanger to receive heat from the waste water through a heat transfer effected by the heat exchanger; (c) withdrawing a first proportion of the heated fresh water at a first temperature; (d) conveying the first proportion of the heated fresh water to cold water storage tank; (e) withdrawing a second proportion of the heated fresh water at a second temperature higher than the first temperature; (f) conveying the second proportion of the heated fresh water to a hot water storage tank.

Kaufmann, R.O.

1986-07-29T23:59:59.000Z

104

Lighting system with heat distribution face plate  

DOE Patents (OSTI)

Lighting systems having a light source and a thermal management system are provided. The thermal management system includes synthetic jet devices, a heat sink and a heat distribution face plate. The synthetic jet devices are arranged in parallel to one and other and are configured to actively cool the lighting system. The heat distribution face plate is configured to radially transfer heat from the light source into the ambient air.

Arik, Mehmet; Weaver, Stanton Earl; Stecher, Thomas Elliot; Kuenzler, Glenn Howard; Wolfe, Jr., Charles Franklin; Li, Ri

2013-09-10T23:59:59.000Z

105

Heat Transfer & Alternative Energy Systems Group Staff ...  

Science Conference Proceedings (OSTI)

Heat Transfer and Alternative Energy Systems Group Staff. Staff Listing. Dr. William M. Healy, Leader, Supervisory Mechanical ...

2013-08-07T23:59:59.000Z

106

Numerical Modeling of Heat Pipe Radiator and Fin Size Optimization for Low and No Gravity Environments.  

E-Print Network (OSTI)

??A heat-pipe radiator element has been designed and modeled to study the efficiency of heat transfer for low and no gravity environments, like in lunar (more)

Bieger, Virginia Ruth

2013-01-01T23:59:59.000Z

107

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

E-Print Network (OSTI)

Based on the status quo that conventional energy sources are more and more reduced and environmental pollution is increasingly serious, this paper presents a new model system of conserving energy and environmental protection, namely, a Solar Assisted Heat Pump Heating System with Latent Heat Storage. In this system, solar energy is the major heat source for a heat pump, and the supplementary heat source is soil. The disagreement in time between the space heat load and heat collected by solar heat collector is solved by latent heat storage. In order to obtain such system running conditions and effects in different heating periods, an experiment has been carried out during the whole heating period in Harbin, China. The experimental results show that this system is much better for heating in initial and late periods than that in middle periods. The average heating coefficient is 6.13 for heating in initial and late periods and 2.94 for heating in middle periods. At the same time, this paper also predicts system running properties in other regions.

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

2006-01-01T23:59:59.000Z

108

Scalable photon monte carlo algorithms and software for the solution of radiative heat transfer problems  

Science Conference Proceedings (OSTI)

Radiative heat transfer plays a central role in many combustion and engineering applications. Because of its highly nonlinear and nonlocal nature, the computational cost can be extremely high to model radiative heat transfer effects accurately. In this ...

Ivana Veljkovic; Paul E. Plassmann

2005-09-01T23:59:59.000Z

109

NIST: Testing of Radiation Detection Systems  

Science Conference Proceedings (OSTI)

Testing of Radiation Detection Systems. ... The GRaDER program will provide users with information about the performance of radiation instruments. ...

2012-12-12T23:59:59.000Z

110

Heat-pipe development for the SPAR space-power system. [100 kW(e)  

SciTech Connect

The SPAR space power system design is based on a high temperature fast spectrum nuclear reactor that furnishes heat to a thermoelectric conversion system to generate an electrical power output of 100 kW/sub (e)/. An important feature of this design is the use of alkali metal heat pipes to provide redundant, reliable, and low-loss heat transfer at high temperature. Three sets of heat pipes are used in the system. These include sodium/molybdenum heat pipes to transfer heat from the reactor core to the conversion system, potassium/niobium heat pipes to couple the conversion system to the radiator in a redundant manner, and potassium/titanium heat pipes to distribute rejected heat throughout the radiator surface. The designs of these units are discussed and fabrication methods and testing results are described. 12 figures.

Ranken, W.A.

1981-01-01T23:59:59.000Z

111

Self-contained passive solar heating system  

SciTech Connect

A self-contained passive solar heating system includes first and second heat pipes, each having a refrigerant medium therein, a condenser portion and an evaporator portion, with the condenser portion of the first heat pipe being coupled to the evaporator portion of the second heat pipe for transferring heat thereto when the pressure within the first heat pipe is greater than the pressure within the second heat pipe. The evaporator portion of the first heat pipe is adapted to be exposed to a source of heat and the condenser portion of the second heat pipe contacts a medium to be heated. A temperature control mechanism may be installed as the coupling between the first and second heat pipes for uncoupling the same when the temperature within the first heat pipe falls below a predetermined temperature. Also, a third heat pipe may be provided having a thermostatic portion operatively connected to the condenser portion of the second heat pipe by a piston means so that changes in pressure within the thermostatic portion occasioned by changes in temperature of the medium to be heated will cause movement of the pistons to vary the size of the condensing portion of the second heat pipe to increase or decrease the rate of heat transfer to the medium.

Maldonado, E.A.; Woods, J.E.

1983-05-10T23:59:59.000Z

112

Handbook of radiative heat transfer in high-temperature gases  

Science Conference Proceedings (OSTI)

This work offers both an original method for calculating optical properties of low-temperature plasma at elevated densities ... and an effective new means for calculating radiative heat transfer in hot gases and plasma with arbitrary temperature and pressure distributions. These methods allow for automatic accounting of all details of the plasma spectrum, including the line structure. This volume contains radiant transfer in problems of heat transfer; integration over frequency; methods of partial characteristics; method of effective populations; calculation of partial characteristics; appendix: tabular data.

Soloukhin, R.I.; Golovnev, I.F.; Zamurayev, V.P.; Katsnelson, S.S.; Kovalskaya, G.A.; Sevastyanenko, V.G.; Soloukhin, R.I.

1987-01-01T23:59:59.000Z

113

Heat engine generator control system  

SciTech Connect

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

114

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

115

Ground-coupled heat pump systems: a pumping analysis.  

E-Print Network (OSTI)

??Ground-coupled heat pump (GCHP) systems use the ground as a heat source or sink that absorbs heat from or rejects heat to the soil, respectively; (more)

Mays, Cristin Jean

2012-01-01T23:59:59.000Z

116

An Evaluation of Shadow Shielding for Lunar System Waste Heat Rejection  

E-Print Network (OSTI)

Shadow shielding is a novel and practical concept for waste heat rejection from lunar surface spacecraft systems. A shadow shield is a light shield that shades the radiator from parasitic thermal radiation emanating from the sun or lunar surface. Radiator size and mass can reduce if the radiator is not required to account for parasitic heat loads in addition to system energy rejection requirements. The lunar thermal environment can be very harsh towards radiative heat rejection. Parasitic heat loads force the radiator to expand in size and mass to compensate. On the Moon, there are three types: surface infrared, solar insulation, and albedo. This thesis tests shadow shielding geometry and its effect on the radiator and nuclear reactor in a reactor-powered Carnot heat engine. Due to the nature of cooling by radiative heat transfer, the maximum shaft work a Carnot system can produce and the minimal required radiator area occurs when the Carnot efficiency is 25%. First, a case for shadow shielding is made using an isothermal, control radiator model in Thermal Desktop. Six radiator temperatures and three latitudes are considered in the tests. Test variables in this section include radiator shapes and shade geometry. The simulations found that shadow shielding is best suited for a low-temperature radiator at the lunar equator. Optimized parabolic shade geometry includes a focus right above or at the top of the radiator and full to three-quarters shade height. The most useful rectangular radiator shape for shadow shielding is that which has a low height and long width. All simulations were conducted using a shade with a 10 kg/m2 area mass. A sensitivity study was conducted for different shade area masses using high and low values found in the literature. The shade is the most useful when the shade's area mass is less than or equal to that of the radiator. If the shade mass is below this threshold, the shade would be applicable to all radiator temperatures tested. Optimized shade and radiator geometry results were then factored into a second model where the radiator is comprised of heat pipes which is similar to radiators from actual system designs. Further simulations were conducted implementing the SAFE-4001 fast fission nuclear reactor design. The study found that shadow shielding allowed the system to use a low-temperature radiator where other configurations were not viable because shadow shielding drastically improves radiative heat transfer from the radiator, but at the consequence of raising radiator mass.

Worn, Cheyn

2012-05-01T23:59:59.000Z

117

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 forms are analyzed and the calculation formulas and characteristic are also given. The results indicate that the efficiency of the parallel-flow form is greater than that of the reverse-flow, so the TDTH system must choose the parallel-flow form. The distance-load ratio (DLR) is defined and the minimum DLR is obtained by the technical and economic feasibility analysis. The paper will provide references for heat-transfer calculation and schematic determination of urban sewage cool or heat source applied delivery heat transfer methods.

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

2006-01-01T23:59:59.000Z

118

Carbon footprints of heating oil and LPG heating systems  

SciTech Connect

For European homes without access to the natural gas grid, the main fuels-of-choice for heating are heating oil and LPG. How do the carbon footprints of these compare? Existing literature does not clearly answer this, so the current study was undertaken to fill this gap. Footprints were estimated in seven countries that are representative of the EU and constitute two-thirds of the EU-27 population: Belgium, France, Germany, Ireland, Italy, Poland and the UK. Novelties of the assessment were: systems were defined using the EcoBoiler model; well-to-tank data were updated according to most-recent research; and combustion emission factors were used that were derived from a survey conducted for this study. The key finding is that new residential heating systems fuelled by LPG are 20% lower carbon and 15% lower overall-environmental-impact than those fuelled by heating oil. An unexpected finding was that an LPG system's environmental impact is about the same as that of a bio heating oil system fuelled by 100% rapeseed methyl ester, Europe's predominant biofuel. Moreover, a 20/80 blend (by energy content) with conventional heating oil, a bio-heating-oil system generates a footprint about 15% higher than an LPG system's. The final finding is that fuel switching can pay off in carbon terms. If a new LPG heating system replaces an ageing oil-fired one for the final five years of its service life, the carbon footprint of the system's final five years is reduced by more than 50%.

Johnson, Eric P., E-mail: ejohnson@ecosite.co.uk

2012-07-15T23:59:59.000Z

119

Heat pump assisted geothermal heating system for Felix Spa, Romania  

Science Conference Proceedings (OSTI)

The paper presents a pre-feasibility type study of a proposed heat pump assisted geothermal heating system for an average hotel in Felix Spa, Romania. After a brief presentation of the geothermal reservoir, the paper gives the methodology and the results of the technical and economical calculations. The technical and economical viability of the proposed system is discussed in detail in the final part of the paper.

Rosca, Marcel; Maghiar, Teodor

1996-01-24T23:59:59.000Z

120

Installation package for a solar heating system  

DOE Green Energy (OSTI)

Installation information is presented for a solar heating system installed in Concho Indian School at El Reno, Oklahoma. This package includes a system Operation and Maintenance Manual, hardware brochures, schematics, system operating modes and drawings. The Solar Engineering and Equipment Company (SEECO) developed this prototype solar heating system consisting of the following subsystems: solar collectors, control and storage.

Not Available

1978-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

Heat recovery anti-icing system  

SciTech Connect

A heat recovery anti-icing system is disclosed. The heat recovery system includes a blower which removes air from the air flow path of a combustion turbine power generating system and circulates the air through a heat exchanger located in the exhaust stack of the combustion turbine. The heated air circulating through the heat exchanger is returned to an inlet filter compartment in the air flow path so as to maintain the temperature of the air in the inlet filter compartment at an elevated level.

Cummins, J.R.

1982-05-11T23:59:59.000Z

122

PREDICTING THE TIME RESPONSE OF A BUILDING UNDER HEAT INPUT CONDITIONS FOR ACTIVE SOLAR HEATING SYSTEMS  

E-Print Network (OSTI)

INPUT CONDITIONS FOR ACTIVE SOLAR HEATING SYSTEMS Mashuri L.CONDITIONS FOR ACTIVE SOLAR HEATING SYSTEMS * Mashuri L.consists of a hydronic solar space heating system with heat

Warren, Mashuri L.

2013-01-01T23:59:59.000Z

123

Radiation beam calorimetric power measurement system  

DOE Patents (OSTI)

A radiation beam calorimetric power measurement system for measuring the average power of a beam such as a laser beam, including a calorimeter configured to operate over a wide range of coolant flow rates and being cooled by continuously flowing coolant for absorbing light from a laser beam to convert the laser beam energy into heat. The system further includes a flow meter for measuring the coolant flow in the calorimeter and a pair of thermistors for measuring the temperature difference between the coolant inputs and outputs to the calorimeter. The system also includes a microprocessor for processing the measured coolant flow rate and the measured temperature difference to determine the average power of the laser beam.

Baker, John (Livermore, CA); Collins, Leland F. (Pleasanton, CA); Kuklo, Thomas C. (Ripon, CA); Micali, James V. (Dublin, CA)

1992-01-01T23:59:59.000Z

124

Heat transport system, method and material  

DOE Patents (OSTI)

A heat transport system, method and composite material 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.

Musinski, Donald L. (Saline, MI)

1987-01-01T23:59:59.000Z

125

Heat recovery in a laundry system  

SciTech Connect

In a laundry system including a washer, a dryer, and a water heater, improvement is disclosed of using a heat pipe to recover waste heat, whether it be from the hot air exhaust of the dryer or from the conductive losses from the dryer and to transfer that heat to the feed water of the water heater.

George, O.F.

1981-06-30T23:59:59.000Z

126

Waste Heat Recapture from Supermarket Refrigeration Systems  

DOE Green Energy (OSTI)

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

127

Design and development of a titanium heat-pipe space radiator  

SciTech Connect

A titanium heat-pipe radiator has been designed for use in a 100-kW/sub e/ nuclear-thermoelectric (TE) space power plant. The radiator is required to have a 99% probability of remaining functional at full power at the end of a seven-year mission. The radiator has a conical-cylindrical shape and is compatible for launch in the space shuttle. The radiator heat pipes are arranged into panel segments and each reactor-core thermoelectric heat-pipe unit has four radiator heat pipes for redundancy. Radiator mass was minimized was based on acceptable losses due to micrometeoroid impact. Results of studies on various design parameters are presented in terms of radiator mass. Developments on the design and testing of the radiator heat pipes are also presented. Prototype titanium (potassium working fluid) heat pipes were fabricated and tested in space-simulating conditions. Testing results are compared to analytical performance predictions.

Girrens, S.P.

1982-03-01T23:59:59.000Z

128

Heat conductivity in linear mixing systems  

E-Print Network (OSTI)

We present analytical and numerical results on the heat conduction in a linear mixing system. In particular we consider a quasi one dimensional channel with triangular scatterers with internal angles irrational multiples of pi and we show that the system obeys Fourier law of heat conduction. Therefore deterministic diffusion and normal heat transport which are usually associated to full hyperbolicity, actually take place in systems without exponential instability.

Baowen Li; Giulio Casati; Jiao Wang

2002-08-06T23:59:59.000Z

129

Active Solar Heating and Cooling Systems Exemption | Department...  

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

Active Solar Heating and Cooling Systems Exemption Active Solar Heating and Cooling Systems Exemption < Back Eligibility Commercial Industrial Residential Savings Category Heating...

130

An Integrated Surface Radiation Measurement System  

Science Conference Proceedings (OSTI)

An integrated surface radiation measurement system has been developed to measure the surface radiation exchange flux. The system employs upward- and downward-looking Eppley pyrgeometers and pyranometers to separately measure four components: ...

A. C. Delany; S. R. Semmer

1998-02-01T23:59:59.000Z

131

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. Before the design process can begin, product specifications, such as steam or water pressures and temperatures, and equipment, such as absorption chillers and heat exchangers, need to be identified and defined. The Energy Engineering Laboratory of the Mechanical Engineering Department of the University of Louisiana at Lafayette and the Louisiana Industrial Assessment Center has been donated an 800kW diesel turbine and a 100 ton absorption chiller from industries. This equipment needs to be integrated with a heat exchanger to work as a Combined Heat and Power system for the University which will supplement the chilled water supply and electricity. The design constraints of the heat recovery unit are the specifications of the turbine and the chiller which cannot be altered.

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

2009-05-01T23:59:59.000Z

132

Analysis of a flexible polymeric film with imbedded micro heat pipes for spacecraft radiators  

E-Print Network (OSTI)

In response to the pursuit of interplanetary travel and a continuous human presence in space, there is increasing focus within the space industry on spacecraft designs that change configuration within the space environment. Flexible thermal radiators are being developed to accommodate deployment mechanisms. An analytical model suggests that a lightweight polymeric material with imbedded micro heat pipe arrays can meet heat dissipation requirements while contributing less mass than competing flexible materials. The heat pipe capillary limit is evaluated as a function of temperature using two candidate working fluids. Using water, maximum heat transport is 18 mW per channel at 140 to 160 C. Maximum heat transport using methanol is 2.2 mW at 120 C: an order-of-magnitude difference. A thermal circuit model translates heat transport per channel into total radiator capacity as a function of heat source temperature and environmental sink temperature. Using water as the working fluid, radiator capacity varies from 6.0 kW to 12.2 kW for source temperatures from 20 to 50 C. For source temperatures 40 C and higher, capacity meets or exceeds the dissipation requirements of a reference spacecraft design. Methanol is not recommended as a working fluid because it produces radiator capacities two to three times lower than when water is used. Although thermal control system specifications constrain the micro heat pipe operating range, design changes directed at alleviating capillary limitations should increase radiator capacity. Technical issues for further investigation include effects of film billowing; performance limitations related to vapor viscosity; working fluid diffusion; and chemical reactivity between the case and working fluid. Compared to a competing graphite fiber weave, the polymeric material has an effective conductivity over ten times higher. Its area power density (kW/m) is 18% to 60% lower than the graphite weave, but its mass power density (kW/kg) is several times higher. Greater flexibility and lower mass make it more amenable to structural integration than the graphite material. Recently developed space-stable polymers offer resistance to harsh temperature and radiation environments, helping to clear the path toward a more extensive use of polymers within the space industry.

McDaniels, Deborah Marie

2001-01-01T23:59:59.000Z

133

Near-field radiative heat transfer for structured surfaces  

E-Print Network (OSTI)

We apply an analytical approach for determining the near-field radiative heat transfer between a metallic nanosphere and a planar semi-infinite medium with some given surface structure. This approach is based on a perturbative expansion, and evaluated to first order in the surface profile. With the help of numerical results obtained for some simple model geometries we discuss typical signatures that should be obtainable with a near-field scanning thermal microscope operated in either constant-height or constant-distance mode.

Svend-Age Biehs; Oliver Huth; Felix Rting

2011-03-15T23:59:59.000Z

134

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

135

Control system for solar heating and cooling  

DOE Green Energy (OSTI)

A control system is being developed that will be capable of operating solar heating and cooling systems covering a wide range of configurations, and using different operating strategies that may be optimal for different climatic regions. To insure widespread applicability of the control system, it is being designed to allow for modification for operating with essentially all practical heating and cooling system configurations and control algorithms simply by interchange of replaceable modules in the circuitry. An experimental heating and cooling system, the main purpose of which is to allow testing and exercise of the controller, was designed so that it could be operated in these various configurations.

Wahlig, M.; Binnall, E.; Dols, C.; Graven, R.; Selph, F.; Shaw, R.; Simmons, M.

1975-08-01T23:59:59.000Z

136

Thermal heat radiation, near-field energy density and near-field radiative heat transfer of coated materials  

E-Print Network (OSTI)

We investigate the thermal radiation and thermal near-field energy density of a metal-coated semi-infinite body for different substrates. We show that the surface polariton coupling within the metal coating leads to an enhancement of the TM-mode part of the thermal near-field energy density when a polar substrate is used. In this case the result obtained for a free standing metal film is retrieved. In contrast, in the case of a metal substrate there is no enhancement in the TM-mode part, as can also be explained within the framework of surface plasmon coupling within the coating. Finally, we discuss the influence of the enhanced thermal energy density on the near-field radiative heat transfer between a simple semi-infinite and a coated semi-infinite body for different material combinations.

Biehs, Svend-Age

2011-01-01T23:59:59.000Z

137

Thermal heat radiation, near-field energy density and near-field radiative heat transfer of coated materials  

E-Print Network (OSTI)

We investigate the thermal radiation and thermal near-field energy density of a metal-coated semi-infinite body for different substrates. We show that the surface polariton coupling within the metal coating leads to an enhancement of the TM-mode part of the thermal near-field energy density when a polar substrate is used. In this case the result obtained for a free standing metal film is retrieved. In contrast, in the case of a metal substrate there is no enhancement in the TM-mode part, as can also be explained within the framework of surface plasmon coupling within the coating. Finally, we discuss the influence of the enhanced thermal energy density on the near-field radiative heat transfer between a simple semi-infinite and a coated semi-infinite body for different material combinations.

Svend-Age Biehs

2011-03-15T23:59:59.000Z

138

Thermal correction to the Casimir force, radiative heat transfer, and an experiment  

E-Print Network (OSTI)

The low-temperature asymptotic expressions for the Casimir interaction between two real metals described by Leontovich surface impedance are obtained in the framework of thermal quantum field theory. It is shown that the Casimir entropy computed using the impedance of infrared optics vanishes in the limit of zero temperature. By contrast, the Casimir entropy computed using the impedance of the Drude model attains at zero temperature a positive value which depends on the parameters of a system, i.e., the Nernst heat theorem is violated. Thus, the impedance of infrared optics withstands the thermodynamic test, whereas the impedance of the Drude model does not. We also perform a phenomenological analysis of the thermal Casimir force and of the radiative heat transfer through a vacuum gap between real metal plates. The characterization of a metal by means of the Leontovich impedance of the Drude model is shown to be inconsistent with experiment at separations of a few hundred nanometers. A modification of the impedance of infrared optics is suggested taking into account relaxation processes. The power of radiative heat transfer predicted from this impedance is several times less than previous predictions due to different contributions from the transverse electric evanescent waves. The physical meaning of low frequencies in the Lifshitz formula is discussed. It is concluded that new measurements of radiative heat transfer are required to find out the adequate description of a metal in the theory of electromagnetic fluctuations.

V. B. Bezerra; G. Bimonte; G. L. Klimchitskaya; V. M. Mostepanenko; C. Romero

2007-08-18T23:59:59.000Z

139

Analysis and numerical optimization of gas turbine space power systems with nuclear fission reactor heat sources  

Science Conference Proceedings (OSTI)

A new three objective optimization technique is developed and applied to find the operating conditions for fission reactor heated Closed Cycle Gas Turbine (CCGT) space power systems at which maximum efficiency, minimum radiator area, and minimum total ...

Albert J. Juhasz / Jerzy Sawicki

2005-01-01T23:59:59.000Z

140

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

E-Print Network (OSTI)

Performance of ground source heat pump system in a near-zerosimulation tool for ground- source heat pump system designflow systems and ground source heat pump systems Abstract

Hong, Tainzhen

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

Energy Basics: Supporting Equipment for Heating and Cooling Systems  

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

for Heating and Cooling Systems Thermostats and ducts provide opportunities for saving energy. Dehumidifying heat pipes provide a way to help central air conditioners and heat...

142

Ventilation and Solar Heat Storage System Offers Big Energy Savings  

Ventilation and Solar Heat Storage System Offers Big Energy Savings ... Heat is either reflected away from the building with radiant barriers, or heat is absorbed

143

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

144

Automatic flue gas heat recovery system  

Science Conference Proceedings (OSTI)

An automatic flue gas heat recovery system for supplementing or replacing a conventional, separate hot water system. In the example described, the heat recovery system is applied to a pizza restaurant where large quantities of heat energy are normally wasted up an oven chimney stack, and large quantities of hot water also are required for restaurant operations. An electric motor driven pump circulates water in a closed loop between a storage tank and a heat exchanger tube located in the oven chimney stack. A thermostat control automatically starts the pump when the oven heats the chimney stack to an effective water heating temperature. When temperature in the storage tank reaches a predetermined maximum, the thermostat control stops the pump, opens a drain valve, and dumps water quickly and completely from the heat exchanger tube. Three different embodiments are shown and described illustrating systems with one or more storage tanks and one or more pumps. In the plural storage tank embodiments, an existing hot water heating tank may be converted for use to augment a main tank supplied with the present system.

Whalen, D.A.

1983-02-22T23:59:59.000Z

145

Radiative Heating Errors in Naturally Ventilated Air Temperature Measurements Made from Buoys*  

Science Conference Proceedings (OSTI)

Solar radiative heating errors in buoy-mounted, naturally ventilated air temperature sensors are examined. Data from sensors with multiplate radiation shields and collocated, fan-aspirated air temperature sensors from three buoy deployments ...

Steven P. Anderson; Mark F. Baumgartner

1998-02-01T23:59:59.000Z

146

Radiative Heat Transfer Analysis within Three-Dimensional Clouds Subjected to Solar and Sky Irradiation  

Science Conference Proceedings (OSTI)

A three-dimensional radiative heat transfer analysis of an arbitrary-shaped modeled cloud subjected to solar and sky irradiation has been performed. The Radiation Element Method by Ray Emission Model (REM2) was used for numerical simulation. ...

Toru Nishikawa; Shigenao Maruyama; Seigo Sakai

2004-12-01T23:59:59.000Z

147

Calculating Monthly Radiative Fluxes and Heating Rates fromMonthly Cloud Observations  

Science Conference Proceedings (OSTI)

The radiative transfer model from NCARs general circulation model CCM3 is modified to calculate monthly radiative fluxes and heating rates from monthly observations of cloud properties from the International Satellite Cloud Climatology Project ...

John W. Bergman; Harry H. Hendon

1998-12-01T23:59:59.000Z

148

POTENTIAL REQUIREMENTS FOR FISSION PRODUCTS AS HEAT AND RADIATION SOURCES  

SciTech Connect

An outline is presented of the potential applications and quantity requiremerts of fission products for the period 1964 to 1968. These applications include military, governmert, and civilian heat sources; irradiation processing; and food irradiation. The potential requirements for 1964 to 1968 are 273 MC / sup 90/Sr and 351 MC /sup 137/Cs. An evaluation is made of the applications of heat-producing isotopes in Coast Guard navigational buoys, lights, and beacons; undersea electronic systems; and weather stations. Costs were determined for conventional methods of power generation and compared to radioisotope power generation. Fuel requiremerts and break-even fuel costs for isotopic power are tabulated. (D.L.C.)

1964-01-01T23:59:59.000Z

149

Philip, South Dakota geothermal district heating systems  

SciTech Connect

The geothermal heating project in Philip, South Dakota which uses the waste water from the Haakon School has now been in operation for 15 years. This project was one of the 23 cost shared by the U.S. DOE starting in 1978, of which 15 became operational. This article describes the geothermal heating system for eight buildings in downtown Philip.

Lund, J.W.

1997-12-01T23:59:59.000Z

150

Energy, cost, and CO 2 emission comparison between radiant wall panel systems and radiator systems  

E-Print Network (OSTI)

The main goal of this paper is to evaluate the possibility of application or replacement of radiators with low-temperature radiant panels. This paper shows the comparison results of operations of 4 space heating systems: the low-temperature radiant panel system without any additional thermal insulation of external walls (PH-WOI), the low-temperature radiant panel system with additional thermal insulation of external walls (PH-WI), the radiator system without any additional thermal insulation of external walls (the classical heating system) (RH-WOI), and the radiator system with additional thermal insulation of external walls (RH-WI). The operation of each system is simulated by software EnergyPlus. The investigation shows that the PH-WI gives the best results. The RH-WOI has the largest energy consumption, and the largest pollutant emission. However, the PH-WI requires the highest investment.

Milorad Boji?; Dragan Cvetkovi?; Marko Mileti?; Jovan Maleevi?; Harry Boyer

2012-12-18T23:59:59.000Z

151

ARM - PI Product - Cloud Properties and Radiative Heating Rates for TWP  

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

ProductsCloud Properties and Radiative Heating Rates for ProductsCloud Properties and Radiative Heating Rates for TWP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send PI Product : Cloud Properties and Radiative Heating Rates for TWP 2002.01.01 - 2012.02.08 Site(s) TWP General Description A cloud properties and radiative heating rates dataset is presented where cloud properties retrieved using lidar and radar observations are input into a radiative transfer model to compute radiative fluxes and heating rates at three ARM sites located in the Tropical Western Pacific (TWP) region. The cloud properties retrieval is a conditional retrieval that applies various retrieval techniques depending on the available data, that is if lidar, radar or both instruments detect cloud. This Combined Remote

152

Radiative component and combined heat transfer in the thermal calculation of finned tube banks  

Science Conference Proceedings (OSTI)

For more exact calculation of combined heat transfer in the case of finned tube banks (e.g., in the convective section of a furnace), the radiative heat transfer cannot be neglected. A new method for relatively simple calculation of total heat flux (convection + radiation + conduction in fins) is fully compatible with that for bare tube banks/bundles developed earlier. It is based on the method of radiative coefficients. However, the resulting value of heat flux must be corrected due to fin thickness and especially due to the fin radiative influence. For this purpose the so-called multiplicator of heat flux was introduced. The applicability of this methods has been demonstrated on a tubular fired heater convective section. A developed computer program based on the method has also been used for an analysis of the influence of selected parameters to show the share of radiation on the total heat flux.

Stehlik, P. [Technical Univ. of Brno (Czech Republic). Dept. of Process Engineering] [Technical Univ. of Brno (Czech Republic). Dept. of Process Engineering

1999-01-01T23:59:59.000Z

153

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...

154

Experiment System Analysis of an Indirect Expansion Solar Assisted Water Source Heat Pump Radiant Floor Heating System  

Science Conference Proceedings (OSTI)

A solar assisted water source heat pump for Radiant Floor Heating (SWHP-RFH) experimental system with heat pipe vacuum tube solar collector as heating source and radiant floor as terminal device is proposed in the paper. The Mathematics Model of dynamic ... Keywords: solar energy, water source heat pump, radiant floor heating systems, system dynamic COP

Qu Shilin; Ma Fei; Liu Li; Yue Jie

2009-10-01T23:59:59.000Z

155

In situ heat treatment process utilizing a closed loop heating system  

Science Conference Proceedings (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

156

Analysis of a direct radiation solar dehumidification system  

DOE Green Energy (OSTI)

SERI researchers investigated a desiccant dehumidifier that is regenerated by direct absorption of solar radiation using a simplified numerical model (DESSIM) of the adsorption and desorption processes. This paper presents estimates of the performance of a solar-fired air conditioning system (ventilation cycle) containing the dehumidifier/collector. The researchers also considered the effects of dehumidifier NTUs, heat exchanger performance, and insolation levels. The direct radiation system can operate effectively at low insolation levels and thus may have some advantages in some geographic areas.

Schultz, K.; Barlow, R.; Pesaran, A.; Kreith, F.

1985-06-01T23:59:59.000Z

157

Comparison of Simulated and Observed Continental Tropical Anvil Clouds and Their Radiative Heating Profiles  

Science Conference Proceedings (OSTI)

Vertically pointing millimeter-wavelength radar observations of anvil clouds extending from mesoscale convective systems (MCSs) that pass over an Atmospheric Radiation Measurement Program (ARM) field site in Niamey, Niger, are compared to anvil structures generated by the Weather Research and Forecasting (WRF) mesoscale model using six different microphysical schemes. The radar data provide the statistical distribution of the radar reflectivity values as a function of height and anvil thickness. These statistics are compared to the statistics of the modeled anvil cloud reflectivity at all altitudes. Requiring the model to be statistically accurate at all altitudes is a stringent test of the model performance. The typical vertical profile of radiative heating in the anvil clouds is computed from the radar observations. Variability of anvil structures from the different microphysical schemes provides an estimate of the inherent uncertainty in anvil radiative heating profiles. All schemes underestimate the optical thickness of thin anvils and cirrus, resulting in a bias of excessive net anvil heating in all of the simulations.

Powell, Scott W.; Houze, R.; Kumar, Anil; McFarlane, Sally A.

2012-09-06T23:59:59.000Z

158

Prototype solar heating and cooling systems  

DOE Green Energy (OSTI)

A collection of quarterly reports from the AiResearch Manufacturing Company covering the period July 12, 1976, through December 31, 1977, is presented. AiResearch Manufacturing Company is developing eight prototype solar heating and cooling systems. This effort calls for the development, manufacture, test, system installation, maintenance, problem resolution, and performance evaluation. The systems are 3, 25 and 75-ton size units.

Not Available

1978-03-01T23:59:59.000Z

159

ORISE: DOE's Radiation Exposure Monitoring System (REMS)  

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

Monitoring System (REMS) Monitoring System (REMS) ORISE maintains large database of radition exposure records for the U.S. Department of Energy ORISE staff monitoring radiation data for DOE Rule 10 CFR 835 establishes the U.S. Department of Energy's (DOE) occupational protection rule and requires assessment and recording of radiation doses to individuals who are exposed to sources of radiation or contamination. The Radiation Exposure Monitoring System (REMS) database is the radiation exposure data repository for all monitored DOE employees, contractors, subcontractors and members of the public. REMS maintains dose records for all monitored individuals dating back to 1969. Aggregated, site-specific data are available on the Radiation Exposure Monitoring System website for all years since 1986. Currently,

160

Computer-controlled radiation monitoring system  

Science Conference Proceedings (OSTI)

A computer-controlled radiation monitoring system was designed and installed at the Lawrence Livermore National Laboratory`s Multiuser Tandem Laboratory (10 MV tandem accelerator from High Voltage Engineering Corporation). The system continuously monitors the photon and neutron radiation environment associated with the facility and automatically suspends accelerator operation if preset radiation levels are exceeded. The system has proved reliable real-time radiation monitoring over the past five years, and has been a valuable tool for maintaining personnel exposure as low as reasonably achievable.

Homann, S.G.

1994-09-27T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

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

162

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

163

Computer Measurement and Automation System for Gas-fired Heating...  

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

Computer Measurement and Automation System for Gas-fired Heating Furnace Title Computer Measurement and Automation System for Gas-fired Heating Furnace Publication Type Journal...

164

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

165

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

166

Zoned heating and air conditioning system  

SciTech Connect

This patent describes a zoned heating and air conditioning system comprising: a central air handling system with an air heating means and an air cooling means and a blower connected to an air duct system; thermostats each have heating and cooling set points, respectively associated with and located in different zones of a building; dampers respectively associated with each building zone positioned in the air duct system. Each damper has an open position allowing air into the respective zone from the duct system and a closed position; relay means for connecting one thermostat to the air handling system upon a call for heating or cooling by one thermostat and disconnecting all other thermostats by connecting one thermostat's connections between the thermostat and air handling system. Only one thermostat is connected to the air handling system at a time and the relay means disconnects one thermostat from the air handling system after one thermostat is satisified; and damper actuating means for unlocking each damper in one building zone responsive actuated by a respective zone thermostat connected to the air handling system by the relay means. The damper actuates means including a damper solenoid for each damper located adjacent each damper and connected to a respective zone thermostat. It unlocks each damper in one building zone responsive to being actuated by the respective zone thermostat and unlocks the dampers in one building zone when one thermostat is actuated while preventing the dampers in another thermostat's building zone from unlocking.

Beachboard, S.A.

1987-06-16T23:59:59.000Z

167

Heating, ventilation and air conditioning systems  

DOE Green Energy (OSTI)

A study is made of several outstanding issues concerning the commercial development of environmental control systems for electric vehicles (EVs). Engineering design constraints such as federal regulations and consumer requirements are first identified. Next, heating and cooling loads in a sample automobile are calculated using a computer model available from the literature. The heating and cooling loads are then used as a basis for estimating the electrical consumption that is to be expected for heat pumps installed in EVs. The heat pump performance is evaluated using an automobile heat pump computer model which has been developed recently at Oak Ridge National Laboratory (ORNL). The heat pump design used as input to the model consists of typical finned-tube heat exchangers and a hermetic compressor driven by a variable-speed brushless dc motor. The simulations suggest that to attain reasonable system efficiencies, the interior heat exchangers that are currently installed as automobile air conditioning will need to be enlarged. Regarding the thermal envelope of the automobile itself, calculations are made which show that considerable energy savings will result if steps are taken to reduce {open_quote}hot soak{close_quote} temperatures and if the outdoor air ventilation rate is well controlled. When these changes are made, heating and cooling should consume less than 10% of the total stored electrical energy for steady driving in most U.S. climates. However, this result depends strongly upon the type of driving: The fraction of total power for heating and cooling ({open_quote}range penalty{close_quote}) increases sharply for driving scenarios having low average propulsion power, such as stop-and-go driving.

Kyle, D.M. [Oak Ridge National Lab., TN (United States); Sullivan, R.A. [Dept. of Energy, Washington, DC (United States)

1993-02-01T23:59:59.000Z

168

Carbon nanotube heat-exchange systems  

DOE Patents (OSTI)

A carbon nanotube heat-exchange system (10) and method for producing the same. One embodiment of the carbon nanotube heat-exchange system (10) comprises a microchannel structure (24) having an inlet end (30) and an outlet end (32), the inlet end (30) providing a cooling fluid into the microchannel structure (24) and the outlet end (32) discharging the cooling fluid from the microchannel structure (24). At least one flow path (28) is defined in the microchannel structure (24), fluidically connecting the inlet end (30) to the outlet end (32) of the microchannel structure (24). A carbon nanotube structure (26) is provided in thermal contact with the microchannel structure (24), the carbon nanotube structure (26) receiving heat from the cooling fluid in the microchannel structure (24) and dissipating the heat into an external medium (19).

Hendricks, Terry Joseph (Arvada, CO); Heben, Michael J. (Denver, CO)

2008-11-11T23:59:59.000Z

169

All Green Residential Solar Energy to Heat Absorption Cooling / Heating Systems  

Science Conference Proceedings (OSTI)

An all-green residential solar to heat absorption cooling / heating system system is designed. It describes the components of the system and working principle, and analyze the prospects of the system and academic value. Finally, To Changsha, for example, ... Keywords: solar, ground-source heat pump, absorption, heat tube

Xu Feng

2013-01-01T23:59:59.000Z

170

Heat generation in natural gas adsorption systems  

SciTech Connect

Experiments were conducted using a high-surface-area carbon as an adsorbent for methane to determine the impact of the heat of adsorption upon the storage capacity. The rapid filling of an adsorption storage system under conditions in which the heat of adsorption is not dissipated results in only about 75% of the methane being stored at 3.44 MPa (500 psia) as can be stored by a slow fill rate with heat dissipation. These results depend upon the initial temperature of the absorbent bed and upon the characteristics of the substrate itself. 4 refs., 5 figs.

Remick, R.J.; Tiller, A.J.

1986-01-01T23:59:59.000Z

171

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, James F. (Bonneville County, ID); Koenig, John F. (Idaho Falls, ID)

1985-01-01T23:59:59.000Z

172

Greenhouse of an underground heat accumulation system  

SciTech Connect

A greenhouse of an underground heat accumulation system is described wherein the radiant energy of the sun or wasted thermal energy is accumulated in the soil below the floor of the greenhouse over a prolonged period of time, and spontaneous release of the accumulated energy into the interior of the greenhouse begins in the wintertime due to a time lag of heat transfer through the soil. The release of the accumulated energy lasts throughout the winter.

Fujie, K.; Abe, K.; Uchida, A.

1983-11-01T23:59:59.000Z

173

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

174

Radiative Heat Transfer in Enhanced Hydrogen Outgassing of Glass  

E-Print Network (OSTI)

W/m 2 .m) f (?T ) Blackbody radiation function I ? SpectralW/m 2 .sr.m) I b,? Blackbody radiation intensity (W/m 2 .can be treated as blackbody radiation at temperature T sur .

Kitamura, Rei; Pilon, Laurent

2009-01-01T23:59:59.000Z

175

Heat Exchangers for Solar Water Heating Systems | Department...  

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

heat to water in a storage tank. Heat-transfer fluids, such as antifreeze, protect the solar collector from freezing in cold weather. Liquid-to-liquid heat exchangers have...

176

Prototype solar heating and hot water systems  

DOE Green Energy (OSTI)

This document is a collection of two quarterly status reports from Colt, Inc., covering the period from October 1, 1977 through June 30, 1978. Colt is developing two prototype solar heating and hot water systems consisting of the following subsystems: collector, storage, control, transport, hot water, and auxiliary energy. The two systems are being installed at Yosemite, California and Pueblo, Colorado.

Not Available

1978-04-01T23:59:59.000Z

177

Corrosion and scaling in solar heating systems  

SciTech Connect

Corrosion, as experienced in solar heating systems, is described in simplistic terms to familiarize designers and installers with potential problems and their solutions. The role of a heat transfer fluid in a solar system is briefly discussed, and the choice of an aqueous solution is justified. The complexities of the multiple chemical and physical reactions are discussed in order that uncertainties of corrosion behavior can be anticipated. Some basic theories of corrosion are described, aggressive environments for some common metals are identified, and the role of corrosion inhibitors is delineated. The similarities of thermal and material charactristics of a solar system and an automotive cooling system are discussed. Based on the many years of experience with corrosion in automotive systems, it is recommended that similar antifreezes and corrosion inhibitors should be used in solar systems. The importance of good solar system design and fabrication is stressed and specific characteristics that affect corrosion are identified.

Foresti, R.J. Jr.

1981-12-01T23:59:59.000Z

178

Heat Recovery Design Considerations for Cogeneration Systems  

E-Print Network (OSTI)

The design and integration of the heat recovery section, which includes the steam generation, auxiliary firing, and steam turbine modules, is critical to the overall performance and economics of cogeneration, systems. In gas turbine topping cogeneration systems, over two-thirds of the energy is in the exhaust gases leaving the gas turbine. In bottoming cycles, where steam and/or electrical power are generated from heating process exhaust streams, the heat recovery design is of primary concern. John Zink Company, since 1929, has specialized in the development, design, and fabrication of energy efficient equipment for the industrial and commercial markets. The paper outlines the design, installation and performance of recently supplied gas turbine cogeneration heat recovery systems. It also describes; several bottoming cycle thermal system designs applied to incinerators, process heaters, refinery secondary reformers and FCC units. Overall parameters and general trends in the design and application of cogeneration thermal systems are presented. New equipment and system designs to reduce pollution and increase overall system efficiency are also reviewed.

Pasquinelli, D. M.; Burns, E. D.

1985-05-01T23:59:59.000Z

179

The Influence of Radiative Transfer on the Mass and Heat Budgets of Ice Crystals Failing in the Atmosphere  

Science Conference Proceedings (OSTI)

A theoretical study was carried out to investigate the effect of radiative heating and cooling on the mass and heat budgets of an ice crystal. Equations describing the radiative budget of an ice crystal were derived and particle absorption ...

Graeme L. Stephens

1983-07-01T23:59:59.000Z

180

Radiative heat transfer between two dielectric nanogratings in the scattering approach  

E-Print Network (OSTI)

We present a theoretical study of radiative heat transfer between dielectric nanogratings in the scattering approach. As a comparision with these exact results, we also evaluate the domain of validity of Derjaguin's Proximity Approximation (PA). We consider a system of two corrugated silica plates with various grating geometries, separation distances, and lateral displacement of the plates with respect to one another. Numerical computations show that while the PA is a good approximation for aligned gratings, it cannot be used when the gratings are laterally displaced. We illustrate this by a thermal modulator device for nanosystems based on such a displacement.

J. Lussange; R. Gurout; F. S. S. Rosa; J. -J. Greffet; A. Lambrecht; S. Reynaud

2012-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

Passive vapor transport solar heating systems  

DOE Green Energy (OSTI)

In the systems under consideration, refrigerant is evaporated in a solar collector and condensed in thermal storage for space or water heating located within the building at a level below that of the collector. Condensed liquid is lifted to an accumulator above the collector by the vapor pressure generated in the collector. Tests of two systems are described, and it is concluded that one of these systems offers distinct advantages.

Hedstrom, J.C.; Neeper, D.A.

1985-01-01T23:59:59.000Z

182

The Impact of Spatial Resolution on Model-Derived Radiative Heating  

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

Impact of Spatial Resolution Impact of Spatial Resolution on Model-Derived Radiative Heating W. O'Hirok and C. Gautier Institute for Computational Earth System Science University of California Santa Barbara, California C. Gautier Department of Geography University of California Santa Barbara, California Introduction At the typical spatial resolution of climate and weather forecasting models, clouds are portrayed as uniform plane-parallel entities with three-dimensional (3D) radiative effects generally considered not important. However, as the resolution of these models increase, and with the development of "super parameterizations" (embedded cloud resolving models), there is a need to assess the spatial resolution where 3D effects should not be neglected (Khairoutdinov and Randall 2001). In this study, we perform

183

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

Open Energy Info (EERE)

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...

184

Assessment of Hybrid Geothermal Heat Pump Systems - Technology...  

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

cool- ing needs of the building and offers general guidelines Assessment of Hybrid Geothermal Heat Pump Systems Geothermal heat pumps offer attractive choice for space...

185

Heating and current drive systems for TPX  

SciTech Connect

The heating and current drive (H and CD) system proposed for the TPX tokamak will consist of ion cyclotron, neutral beam, and lower hybrid systems. It will have 17.5 MW of installed H and CD power initially, and can be upgraded to 45 MW. It will be used to explore advanced confinement and fully current-driven plasma regimes with pulse lengths of up to 1,000 s.

Swain, D.; Goranson, P. [Oak Ridge National Lab., TN (United States); Halle, A. von; Bernabei, S.; Greenough, N. [Princeton Univ., NJ (United States). Plasma Physics Lab.

1994-05-24T23:59:59.000Z

186

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

Science Conference Proceedings (OSTI)

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

187

Development of a Computer Heating Monitoring System and Its Applications  

E-Print Network (OSTI)

This paper develops a computer heating monitoring system, introduces the components and principles of the monitoring system, and provides a study on its application to residential building heating including analysis of indoor and outdoor air temperature, heating index and energy savings. The results show that the current heating system has a great potential for energy conservation.

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

2006-01-01T23:59:59.000Z

188

Radiation Detection Materials and Systems | ornl.gov  

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

Radiation Detection Materials and Systems SHARE Radiation Detection Materials and Systems ORNL's Nuclear Material Detection and Characterization programs are at the forefront of...

189

Emergency heat removal system for a nuclear reactor  

DOE Patents (OSTI)

A heat removal system for nuclear reactors serving as a supplement to an Emergency Core Cooling System (ECCS) during a Loss of Coolant Accident (LOCA) comprises a plurality of heat pipes having one end in heat transfer relationship with either the reactor pressure vessel, the core support grid structure or other in-core components and the opposite end located in heat transfer relationship with a heat exchanger having heat transfer fluid therein. The heat exchanger is located external to the pressure vessel whereby excessive core heat is transferred from the above reactor components and dissipated within the heat exchanger fluid.

Dunckel, Thomas L. (Potomac, MD)

1976-01-01T23:59:59.000Z

190

Thermal Solar Energy Systems for Space Heating of Buildings  

E-Print Network (OSTI)

In this study, the simulation and the analysis of a solar flat plate collectors combined with a compression heat pump is carried out. The system suggested must ensure the heating of a building without the recourse to an auxiliary energy source in complement of this heating system. The system is used to heat a building using heating floor. The building considered is located in Constantine-East of Algeria (Latitude 36.28 N, Longitude 6.62 E, Altitude 689m). For the calculation, the month of February was chosen, which is considered as the coldest month according to the weather data of Constantine. The performances of this system were compared to the performances of the traditional solar heating system using solar collectors and an auxiliary heating load 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 combined with heat pump improve the thermal performance of the heat pump and the global system. The performances of the heating system combining heat pump and solar collectors are higher than that of solar heating system with solar collectors and storage tank. The heat pump assisted by solar energy can contribute to the conservation of conventional energy and can be competitive with the traditional systems of heating.

Gomri, R.; Boulkamh, M.

2010-01-01T23:59:59.000Z

191

Fluctuating-surface-current formulation of radiative heat transfer for arbitrary geometries  

E-Print Network (OSTI)

We describe a fluctuating-surface-current formulation of radiative heat transfer, applicable to arbitrary geometries in both the near and far field, that directly exploits efficient and sophisticated techniques from the ...

Rodriguez, Alejandro W.

192

Lecture 3 week 2/3 2012: Solar radiation, the greenhouse, global heat engine  

E-Print Network (OSTI)

... that would be like 13.68 one- hundred watt light bulbs illuminating a one-meter square surface, except that light bulbs put about 80% of their 100 watts of power into heat/infrared radiation. Given the distance

193

A 10-Year Climatology of Tropical Radiative Heating and Its Vertical Structure from TRMM Observations  

Science Conference Proceedings (OSTI)

This paper outlines recent advances in estimating atmospheric radiative heating rate profiles from the sensors aboard the Tropical Rainfall Measuring Mission (TRMM). The approach employs a deterministic framework in which four distinct retrievals ...

Tristan S. LEcuyer; Greg McGarragh

2010-02-01T23:59:59.000Z

194

District Heating System, City of Caliente, Nevada.  

SciTech Connect

Considerable preliminary information has been gathered on the heating requirements of Caliente. It is reported that the City consists of 320 residential buildings, 90 commercial buildings, and two industries, a total of 412. Heating is predominantly by fuel oil or LPG. Only 113 of the residential, 17 of the commercial, and 1 of the industrial buildings are heated electrically. It is also reported that the average electrically heated home consumed 13,600 KWH in the year 1978, and the average all-electric commercial building 53,100 KWH. A geothermal district heating system for the city of Caliente, Nevada is economically feasible. This assumes that a 160/sup 0/F geothermal source capable of delivering a peak load of 850 gallons per minute from a relatively shallow depth can be located within, or near, the City boundaries. Total volume needed from the geothermal reservoir during the 20 year project life is 5400 acre-feet. Based on 8% bond financing of a capital investment for equipment of $2,500,000, a present worth of about $5,400,000 is generated over the project life. Total energy saved during the project life is 63 million KWH of electricity, and 7.5 millions therms of fuel.

1980-12-31T23:59:59.000Z

195

Adaptable radiation monitoring system and method  

DOE Patents (OSTI)

A portable radioactive-material detection system capable of detecting radioactive sources moving at high speeds. The system has at least one radiation detector capable of detecting gamma-radiation and coupled to an MCA capable of collecting spectral data in very small time bins of less than about 150 msec. A computer processor is connected to the MCA for determining from the spectral data if a triggering event has occurred. Spectral data is stored on a data storage device, and a power source supplies power to the detection system. Various configurations of the detection system may be adaptably arranged for various radiation detection scenarios. In a preferred embodiment, the computer processor operates as a server which receives spectral data from other networked detection systems, and communicates the collected data to a central data reporting system.

Archer, Daniel E. (Livermore, CA); Beauchamp, Brock R. (San Ramon, CA); Mauger, G. Joseph (Livermore, CA); Nelson, Karl E. (Livermore, CA); Mercer, Michael B. (Manteca, CA); Pletcher, David C. (Sacramento, CA); Riot, Vincent J. (Berkeley, CA); Schek, James L. (Tracy, CA); Knapp, David A. (Livermore, CA)

2006-06-20T23:59:59.000Z

196

Convective heat transport in geothermal systems  

DOE Green Energy (OSTI)

Most geothermal systems under exploitation for direct use or electrical power production are of the hydrothermal type, where heat is transferred essentially by convection in the reservoir, conduction being secondary. In geothermal systems, buoyancy effects are generally important, but often the fluid and heat flow patterns are largely controlled by geologic features (e.g., faults, fractures, continuity of layers) and location of recharge and discharge zones. During exploitation, these flow patterns can drastically change in response to pressure and temperature declines, and changes in recharge/discharge patterns. Convective circulation models of several geothermal systems, before and after start of fluid production, are described, with emphasis on different characteristics of the systems and the effects of exploitation on their evolution. Convective heat transport in geothermal fields is discussed, taking into consideration (1) major geologic features; (2) temperature-dependent rock and fluid properties; (3) fracture- versus porous-medium characteristics; (4) single- versus two-phase reservoir systems; and (5) the presence of noncondensible gases.

Lippmann, M.J.; Bodvarsson, G.S.

1986-08-01T23:59:59.000Z

197

Geothermal Heat Pump Systems: Applications and Technology Development  

Science Conference Proceedings (OSTI)

This report discusses a hybrid geothermal heat pump system, an efficient, all-electric heating and cooling option for small and large commercial buildings. In this system, the ground loop heat exchanger is sized for winter heating and supplemented by auxiliary heat rejection devices (such as fluid coolers or cooling towers) for summer operation that prevent performance-impeding heat buildup in the earth surrounding the ground loop.

2003-11-03T23:59:59.000Z

198

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

for the solar-heated hot water. This heater can be seen inwater (solar heated, boosted, or heated entirely in the auxiliary heater)

Dols, C.

2010-01-01T23:59:59.000Z

199

Fluctuational-electrodynamic theory and dynamics of heat transfer in multiple dipolar systems  

E-Print Network (OSTI)

A general fluctuational-electrodynamic theory is developed to investigate radiative heat exchanges between objects which are assumed small compared with their thermal wavelength (dipolar approximation) in N-body systems immersed in a thermal bath. This theoretical framework is applied to study the dynamic of heating/cooling of three-body systems. We show that many-body interactions allow to tailor the temperature field distribution and to drastically change the time scale of thermal relaxation processes.

Messina, Riccardo; Biehs, Svend-Age; Ben-Abdallah, Philippe

2013-01-01T23:59:59.000Z

200

Method and device for predicting wavelength dependent radiation influences in thermal systems  

DOE Patents (OSTI)

A method and apparatus for predicting the spectral (wavelength-dependent) radiation transport in thermal systems including interaction by the radiation with partially transmitting medium. The predicted model of the thermal system is used to design and control the thermal system. The predictions are well suited to be implemented in design and control of rapid thermal processing (RTP) reactors. The method involves generating a spectral thermal radiation transport model of an RTP reactor. The method also involves specifying a desired wafer time dependent temperature profile. The method further involves calculating an inverse of the generated model using the desired wafer time dependent temperature to determine heating element parameters required to produce the desired profile. The method also involves controlling the heating elements of the RTP reactor in accordance with the heating element parameters to heat the wafer in accordance with the desired profile.

Kee, Robert J. (864 Lucille St., Livermore, CA 94550); Ting, Aili (7329 Stonedale Dr., Pleasanton, CA 94558)

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

the use of heat Heat exchangers between the collectors andlocated access hole. The heat exchanger for the domestic hotmains is preheated by a heat exchanger immersed in the main

Dols, C.

2010-01-01T23:59:59.000Z

202

Membrane heat pipe development for space radiator applications  

SciTech Connect

A self-deploying membrane heat pipe (SMHP) is being designed and fabricated to operate in an in-cabin experiment aboard a STS flight. The heat pipe comprises a mylar membrane with a woven fabric arterial wick and R-11 as the working fluid. Preliminary results indicate that this SMHP design will successfully expand and retract in response to an applied heat load; the retraction force is provided by a constant force spring.

Woloshun, K.; Merrigan, M.

1986-01-01T23:59:59.000Z

203

Waste heat recovery system having thermal sleeve support for heat pipe  

SciTech Connect

A system for recovering waste heat from a stream of heated gas is disclosed. The system includes a convection heat transfer chamber, a boiler tank, and a plurality of heat pipes thermally interconnecting the convection heat transfer chamber with the boiler tank. Each of the heat pipes includes an evaporator section which is disposed in heat transfer relation with a stream of heated gas flowing through the convection heat transfer chamber, and a condenser section disposed in heat transfer relation with a volume of water contained within the boiler tank. The boiler tank is provided with a header plate having an array of heat pipe openings through which the heat pipes project. A heat pipe support sleeve is received in each heat pipe opening in sealed engagement with the header plate, with the heat pipes projecting through the support sleeves and thermally interconnecting the convection heat transfer chamber with the boiler tank. An intermediate portion of each heat pipe is received in sealed engagement with its associated support sleeve. In a preferred embodiment, heat transfer through the support sleeve is minimized in an arrangement in which each heat pipe opening is reduced by a stepped bore with the support sleeve connected in threaded, sealed engagement with the stepped bore. Futhermore, in this arrangement, the support sleeve has swaged end portions which project beyond the header plate and engage the heat pipe on opposite sides at points which are remote with respect to the support sleeve/header plate interface. One of the swages end portions is sealed against the heat pipe in a fluid-tight union within the boiler tank. The support sleeve is radially spaced with respect to the heat pipe, and is also radially spaced with respect to the heat pipe opening whereby heat transfer through the walls of the heat pipe to the support sleeve and to the header plate is minimized by concentric annular air gaps.

McCurley, J.

1984-01-24T23:59:59.000Z

204

Waste heat recovery system having thermal sleeve support for heat pipe  

SciTech Connect

A system for recovering waste heat from a stream of heated gas is disclosed. The system includes a convection heat transfer chamber, a boiler tank, and a plurality of heat pipes thermally interconnecting the convection heat transfer chamber with the boiler tank. Each of the heat pipes includes an evaporator section which is disposed in heat transfer relation with a stream of heated gas flowing through the convection heat transfer chamber, and a condenser section disposed in heat transfer relation with a volume of water contained within the boiler tank. The boiler tank is provided with a header plate having an array of heat pipe openings through which the heat pipes project. A heat pipe support sleeve is received in each heat pipe opening in sealed engagement with the header plate, with the heat pipes projecting through the support sleeves and thermally interconnecting the convection heat transfer chamber with the boiler tank. An intermediate portion of each heat pipe is received in sealed engagement with its associated support sleeve. In a preferred embodiment, heat transfer through the support sleeve is minimized in an arrangement in which each heat pipe opening is reduced by a stepped bore with the support sleeve connected in threaded, sealed engagement with the stepped bore. Furthermore, in this arrangement, the support sleeve has swaged end portions which project beyond the header plate and engage the heat pipe on opposite sides at points which are remote with respect to the support sleeve/header plate interface. One of the swaged end portions is sealed against the heat pipe in a fluid-tight union within the boiler tank. The support sleeve is radially spaced with respect to the heat pipe, and is also radially spaced with respect to the heat pipe opening whereby heat transfer through the walls of the heat pipe to the support sleeve and to the header plate is minimized by concentric annular air gaps.

McCurley, J.

1984-04-10T23:59:59.000Z

205

Waste heat recovery system having thermal sleeve support for heat pipe  

SciTech Connect

A system for recovering waste heat from a stream of heated gas is disclosed. The system includes a convection heat transfer chamber, a boiler tank, and a plurality of heat pipes thermally interconnecting the convection heat transfer chamber with the boiler tank. Each of the heat pipes includes an evaporator section which is disposed in heat transfer relation with a stream of heated gas flowing through the convection heat transfer chamber, and a condenser section disposed in heat transfer relation with a volume of water contained within the boiler tank. The boiler tank is provided with a header plate having an array of heat pipe openings through which the heat pipes project. A heat pipe support sleeve is received in each heat pipe opening in sealed engagement with the header plate, with the heat pipes projecting through the support sleeves and thermally interconnecting the convection heat transfer chamber with the boiler tank. An intermediate portion of each heat pipe is received in sealed engagement with its associated support sleeve. In a preferred embodiment, heat transfer through the support sleeve is minimized in an arrangement in which each heat pipe opening is reduced by a stepped bore with the support sleeve connected in threaded, sealed engagement with the stepped bore. Furthermore, in this arrangement, the support sleeve has swaged end portions which project beyond the header plate and engage the heat pipe on opposite sides at points which are remote with respect to the support sleeve/header plate interface. One of the swaged end portions is sealed against the heat pipe in a fluid-tight union within the boiler tank. The support sleeve is radially spaced with respect to the heat pipe and is also radially spaced with respect to the heat pipe opening whereby heat transfer through the walls of the heat pipe to the support sleeve and to the header plate is minimized by concentric annular air gaps.

McCurley, J.

1984-12-04T23:59:59.000Z

206

Waste heat recovery system having thermal sleeve support for heat pipe  

SciTech Connect

A system for recovering waste heat from a stream of heated gas is disclosed. The system includes a convection heat transfer chamber, a boiler tank, and a plurality of heat pipes thermally interconnecting the convection heat transfer chamber with the boiler tank. Each of the heat pipes includes an evaporator section which is disposed in heat transfer relation with a stream of heated gas flowing through the convection heat transfer chamber, and a condenser section disposed in heat transfer relation with a volume of water contained within the boiler tank. The boiler tank is provided with a header plate having an array of heat pipe openings through which the heat pipes project. A heat support sleeve is received in each heat pipe opening in sealed engagement with the header plate, with the heat pipes projecting through the support sleeves and thermally interconnecting the convection heat transfer chamber with the boiler tank. An intermediate portion of each heat pipe is received in sealed engagement with its associated support sleeve. In a preferred embodiment, heat transfer through the support sleeve is minimized in an arrangement in which each heat pipe opening is reduced by a stepped bore with the support sleeve connected in threaded, sealed engagement with the stepped bore. Furthermore, in this arrangement, the support sleeve has swaged end portions which project beyond the header plate and engage the heat pipe on opposite sides at points which are remote with respect to the support sleeve/header plate interface. One of the swaged end portions is sealed against the heat pipe in a fluid-tight union within the boiler tank. The support sleeve is radially spaced with respect to the heat pipe, and is also radially spaced with respect to the heat pipe opening whereby heat transfer through the walls of the heat pipe to the support sleeve and to the header plate is minimized by concentric annular air gaps.

McCurley, J.

1984-12-18T23:59:59.000Z

207

The multiple absorption coefficient zonal method (MACZM), an efficient computational approach for the analysis of radiative heat transfer in multidimensional inhomogeneous nongray media  

E-Print Network (OSTI)

of Radiative Heat Transfer, the P-3 Approximation, AIAAMedia, Journal of Heat Transfer, Vol. 109, No. 3 (1987),Media, Numerical Heat Transfer, Part B, Fundamentals, Vol.

Yuen, W W

2006-01-01T23:59:59.000Z

208

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

209

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

210

Waste Heat Recovery System: Lightweight Thermal Energy Recovery (LIGHTER) System  

SciTech Connect

Broad Funding Opportunity Announcement Project: GM is using shape memory alloys that require as little as a 10C temperature difference to convert low-grade waste heat into mechanical energy. When a stretched wire made of shape memory alloy is heated, it shrinks back to its pre-stretched length. When the wire cools back down, it becomes more pliable and can revert to its original stretched shape. This expansion and contraction can be used directly as mechanical energy output or used to drive an electric generator. Shape memory alloy heat engines have been around for decades, but the few devices that engineers have built were too complex, required fluid baths, and had insufficient cycle life for practical use. GM is working to create a prototype that is practical for commercial applications and capable of operating with either air- or fluid-based heat sources. GMs shape memory alloy based heat engine is also designed for use in a variety of non-vehicle applications. For example, it can be used to harvest non-vehicle heat sources, such as domestic and industrial waste heat and natural geothermal heat, and in HVAC systems and generators.

2010-01-01T23:59:59.000Z

211

High Temperature Variable Conductance Heat Pipes for Radioisotope Stirling Systems  

SciTech Connect

In a Stirling radioisotope system, heat must continually be removed from the GPHS modules, to maintain the GPHS modules and surrounding insulation at acceptable temperatures. Normally, the Stirling converter provides this cooling. If the Stirling engine stops in the current system, the insulation is designed to spoil, preventing damage to the GPHS, but also ending the mission. An alkali-metal Variable Conductance Heat Pipe (VCHP) is under development to allow multiple stops and restarts of the Stirling engine. The status of the ongoing effort in developing this technology is presented in this paper. An earlier, preliminary design had a radiator outside the Advanced Stirling Radioisotope Generator (ASRG) casing, used NaK as the working fluid, and had the reservoir located on the cold side adapter flange. The revised design has an internal radiator inside the casing, with the reservoir embedded inside the insulation. A large set of advantages are offered by this new design. In addition to reducing the overall size and mass of the VCHP, simplicity, compactness and easiness in assembling the VCHP with the ASRG are significantly enhanced. Also, the permanently elevated temperatures of the entire VCHP allows the change of the working fluid from a binary compound (NaK) to single compound (Na). The latter, by its properties, allows higher performance and further mass reduction of the system. Preliminary design and analysis shows an acceptable peak temperature of the ASRG case of 140 deg. C while the heat losses caused by the addition of the VCHP are 1.8 W.

Tarau, Calin; Walker, Kara L.; Anderson, William G. [Advanced Cooling Technologies, Inc. 1046 New Holland Ave. Lancaster, PA 17601 (United States)

2009-03-16T23:59:59.000Z

212

District heating system, City of Caliente, Nevada  

DOE Green Energy (OSTI)

An updated feasibility study of the district heating system is described. The study was made in two parts, Option 1 and Option 2. Option 1 is a district heating system for the city of Caliente only, whereas Option 2 assumes making 140{sup 0}F water available to the Mark West Development, about five miles to the west of the city. The city district heating system is based on a supply water temperature of 175{sup 0}F and 120{sup 0}F return temperature. The capital cost estimate for Option 1 is $3,140,000. The resultant savings in conventional energy cost over a 20 year project life, assuming 12% bond financing, show a present worth of $4,074,000. This shows that the project should be economically feasible. The capital cost for Option 2 is estimated to be $4,230,000. The additional cost of Option 2 over Option 1, $1,090,000, will have to be recovered by the fee charged to the Mark West Development users for the water made available to them. Since, however, this use is unknown an evaluation of the economic feasibility of Option 2 cannot be made at this time.

Karlsson, T.

1984-06-01T23:59:59.000Z

213

Vehicle hydraulic system that provides heat for passenger compartment  

DOE Patents (OSTI)

A vehicle includes a vehicle housing which defines a passenger compartment. Attached to the vehicle housing is a hydraulic system, that includes a hydraulic fluid which flows through at least one passageway within the hydraulic system. Also attached to the vehicle housing is a passenger compartment heating system. The passenger compartment heating system includes a heat exchanger, wherein a portion of the heat exchanger is a segment of the at least one passageway of the hydraulic system.

Bartley, Bradley E. (Manito, IL); Blass, James R. (Bloomington, IL); Gibson, Dennis H. (Chillicothe, IL)

2001-01-01T23:59:59.000Z

214

Predictive control of supply temperature in district heating systems  

E-Print Network (OSTI)

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

215

A Systematic Study of Longwave Radiative Heating and Cooling within Valleys and Basins Using a Three-Dimensional Radiative Transfer Model  

Science Conference Proceedings (OSTI)

The Monte Carlo code for the physically correct tracing of photons in cloudy atmospheres (MYSTIC) three-dimensional radiative transfer model was used in a parametric study to determine the strength of longwave radiative heating and cooling in ...

Sebastian W. Hoch; C. David Whiteman; Bernhard Mayer

2011-12-01T23:59:59.000Z

216

Building Codes and Regulations for Solar Water Heating Systems...  

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

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...

217

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

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

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....

218

Method for heat treating and sintering metal oxides with microwave radiation  

DOE Patents (OSTI)

A method for microwave sintering materials, primarily metal oxides, is described. Metal oxides do not normally absorb microwave radiation at temperatures ranging from about room temperature to several hundred degrees centrigrade are sintered with microwave radiation without the use of the heretofore required sintering aids. This sintering is achieved by enclosing a compact of the oxide material in a housing or capsule formed of a oxide which has microwave coupling properties at room temprature up to at least the microwave coupling temperature of the oxide material forming the compact. The heating of the housing effects the initial heating of the oxide material forming the compact by heat transference and then functions as a thermal insulator for the encased oxide material after the oxide material reaches a sufficient temperature to adequately absorb or couple with microwave radiation for heating thereof to sintering temperature.

Holcombe, Cressie E. (Farragut, TN); Dykes, Norman L. (Oak Ridge, TN); Meek, Thomas T. (Knoxville, TN)

1989-01-01T23:59:59.000Z

219

Control system for electric water heater with heat pump external heat source  

Science Conference Proceedings (OSTI)

A control system for an electric water heater operatively associated with an external heat source, such as a heat pump. The water heater includes a water storage tank provided with an electric tank heating unit having a tank thermostat which closes in response to water temperature in the tank, allowing a flow of current through the tank heating unit so as to turn it on to heat the water, and which opens when the tank thermostat has been satisfied, interrupting the current flow so as to turn the tank heating unit off. The control system as responsive to the initial current surge through the tank heating unit when the tank thermostat closes to interrupt the current flow to the tank heating unit so as to maintain the heating unit off and to turn on the external heat source and maintain it on until the tank thermostat opens. The initial current surge cleans the contacts of the tank thermostat by burning off any insulating oxide residues which may have formed on them. The control system includes means responsive to abnormal conditions which would prevent the external heat source from heating water effectively for turning off the external heat source and turning on the tank heating unit and maintaining the external heat source off and the tank heating unit on until the tank thermostat is satisfied.

Shaffer Jr., J. E.; Picarello, J. F.

1985-09-10T23:59:59.000Z

220

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

DOE Green Energy (OSTI)

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

Note: This page contains sample records for the topic "radiator heating systems" 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

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

2012-01-01T23:59:59.000Z

222

Efficiency of Steam and Hot Water Heat Distribution Systems  

E-Print Network (OSTI)

Efficiency of Steam and Hot Water Heat Distribution Systems Gary Phetteplace September 1995- tion medium (steam or hot water) and temperature for heat distribution systems. The report discusses the efficiency of both steam and hot water heat distribution systems in more detail. The results of several field

223

Solar heating system final design package  

DOE Green Energy (OSTI)

Contemporary Systems has taken its Series V Solar Heating System and developed it to a degree acceptable by local codes and regulatory agencies. The system is composed of the Series V warm air collector, the LCU-110 logic control unit and the USU-A universal switching and transport unit. The collector was originally conceived and designed as an integrated roof/wall system and provides a dual function in the structure. The collector serves both as a solar energy conversion system and as a structural weather resistant skin. The collector can be fabricated in any length from 12 to 24 feet. This provides maximum flexibility in design and installation. The LCU-110 control unit provides totally automatic control over the operation of the system. It receives input data from sensor probes in collectors, storage and living space. The logic is designed so as to make maximum use of solar energy and minimize use of conventional energy. The USU-A transport and switching unit is a high-efficiency air-handling system equipped with gear motor valves that respond to outputs from the control system. The fan unit is designed for maximum durability and efficiency in operation, and has permanently lubricated ball bearings and excellent air-handling efficiency.

Not Available

1979-05-01T23:59:59.000Z

224

Thermal-radiation heat-transfer model for degraded cores. [PWR; BWR  

SciTech Connect

One consequence of the accident at the Three Mile Island Unit 2 (TMI-2) nuclear power plant is a realization by the nuclear power technical community that there is a need for calculational tools that can be used to analyze the TMI-2 accident and to investigate hypothetical situations involving degraded light-water reactor (LWR) cores. As a result, there are now several ongoing modeling and code development efforts in the United States among which is the development of the MIMAS (Multifield Integrated Meltdown Analysis System code) at the Los Alamos National Laboratory. This paper describes a thermal-radiation heat-transfer model for LWR degraded cores that has been developed for the MIMAS code.

Tomkins, J.L.

1983-01-01T23:59:59.000Z

225

A simple external resistance heating diamond anvil cell and its application for synchrotron radiation x-ray diffraction  

SciTech Connect

A simple external heating assemblage allowing diamond anvil cell experiments at pressures up to 34 GPa and temperatures up to 653 K was constructed. This cell can be connected to the synchrotron radiation conveniently. The design and construction of this cell are fully described, as well as its applications for x-ray diffraction. Heating is carried out by using an external-heating system, which is made of NiCr resistance wire, and the temperature was measured by a NiCr-NiSi or PtRh-Pt thermocouple. We showed the performance of the new system by introducing the phase transition study of cinnabar ({alpha}-HgS) and thermal equation of state study of almandine at high pressure and temperature with this cell.

Fan Dawei; Zhou Wenge; Liu Yonggang; Xie Hongsen [Institute of Geochemistry of Earth's Deep Interior Materials and Fluid Interaction, Chinese Academy of Sciences, Guiyang 550002 (China); Wei Shuyi [Institute of Geochemistry of Earth's Deep Interior Materials and Fluid Interaction, Chinese Academy of Sciences, Guiyang 550002 (China); Graduate School of Chinese Academy of Sciences, Beijing 100049 (China); Ma Maining [Graduate School of Chinese Academy of Sciences, Beijing 100049 (China)

2010-05-15T23:59:59.000Z

226

Solar-powered turbocompressor heat pump system  

DOE Patents (OSTI)

The turbocompressor comprises a power turbine and a compressor turbine having respective rotors and on a common shaft, rotatably supported by bearings. A first working fluid is supplied by a power loop and is expanded in the turbine. A second working fluid is compressed in the turbine and is circulated in a heat pump loop. A lubricant is mixed with the second working fluid but is excluded from the first working fluid. The bearings are cooled and lubricated by a system which circulates the second working fluid and the intermixed lubricant through the bearings. Such system includes a pump, a thermostatic expansion valve for expanding the working fluid into the space between the bearings, and a return conduit system for withdrawing the expanded working fluid after it passes through the bearings and for returning the working fluid to the evaporator. A shaft seal excludes the lubricant from the power turbine. The power loop includes a float operable by liquid working fluid in the condenser for controlling a recirculation valve so as to maintain a minimum liquid level in the condenser, while causing a feed pump to pump most of the working fluid into the vapor generator. The heat pump compressor loop includes a float in the condenser for operating and expansion valve to maintain a minimum liquid working fluid level in the condenser while causing most of the working fluid to be expanded into the evaporator.

Landerman, A.M.; Biancardi, F.R.; Melikian, G.; Meader, M.D.; Kepler, C.E.; Anderson, T.J.; Sitler, J.W.

1982-08-12T23:59:59.000Z

227

An Iterative Radiative Transfer Code For Ocean-Atmosphere Systems  

Science Conference Proceedings (OSTI)

We describe the details of an iterative radiative transfer code for computing the intensity and degree of polarization of diffuse radiation in models of the ocean-atmosphere system. The present code neglects the upwelling radiation from below the ...

Ziauddin Ahmad; Robert S. Fraser

1982-03-01T23:59:59.000Z

228

Heat exchanger bypass system for an absorption refrigeration system  

DOE Patents (OSTI)

A heat exchanger bypass system for an absorption refrigeration system is disclosed. The bypass system operates to pass strong solution from the generator around the heat exchanger to the absorber of the absorption refrigeration system when strong solution builds up in the generator above a selected level indicative of solidification of strong solution in the heat exchanger or other such blockage. The bypass system includes a bypass line with a gooseneck located in the generator for controlling flow of strong solution into the bypass line and for preventing refrigerant vapor in the generator from entering the bypass line during normal operation of the refrigeration system. Also, the bypass line includes a trap section filled with liquid for providing a barrier to maintain the normal pressure difference between the generator and the absorber even when the gooseneck of the bypass line is exposed to refrigerant vapor in the generator. Strong solution, which may accumulate in the trap section of the bypass line, is diluted, to prevent solidification, by supplying weak solution to the trap section from a purge system for the absorption refrigeration system.

Reimann, Robert C. (Lafayette, NY)

1984-01-01T23:59:59.000Z

229

Waste heat driven absorption refrigeration process and system  

DOE Patents (OSTI)

Absorption cycle refrigeration processes and systems are provided which are driven by the sensible waste heat available from industrial processes and other sources. Systems are disclosed which provide a chilled water output which can be used for comfort conditioning or the like which utilize heat from sensible waste heat sources at temperatures of less than 170.degree. F. Countercurrent flow equipment is also provided to increase the efficiency of the systems and increase the utilization of available heat.

Wilkinson, William H. (Columbus, OH)

1982-01-01T23:59:59.000Z

230

Solar heating of integrated greenhouse-animal shelter systems  

SciTech Connect

An analytical procedure to determine the effectiveness of greenhouses as solar collectors was presented. This procedure was used to predict the effect of several construction parameters on solar radiation input to greenhouses. The orientation of the greenhouse was found to be the most effective construction parameter controlling solar radiation input to greenhouses. The effective albedo of the plant canopy was also found to be a significant factor. A new solar greenhouse design, suitable for high latitude regions was developed. The results showed that an internal solar collector could be incorporated as an integral part of the greenhouse design. The concept developed could be used as a free-standing greenhouse or in a combination with livestock building. The efficiency of the solar input was investigated for the conventional and the shed greenhouses, both as a free-standing unit and a greenhouse-animal shelter system, using computer simulation analyses. The results indicated that the efficiency of solar input is highly dependent on location; the effect of location on the shed type design is more profound. A typical case of a greenhouse-hog barn production system was investigated using computer simulation analyses. The results showed that such a food production system achieves a significant reduction in conventional fuel consumption due to both animal waste heat recovery and solar energy utilization.

Ben-Abdallah, N.

1983-01-01T23:59:59.000Z

231

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/or heating a hot water supply. The results also show that the efficiency of the system's components and how the investment costs greatly affect the wide acceptability and use of the system. Solar energy is clean and renewable and having not to pay the solar energy costs, the solar energy heat-pump system is still attractive and will have a large market.

Gao, Y.; Wang, S.

2006-01-01T23:59:59.000Z

232

Advanced Heat Pump Water Heating Technology: Testing Commercial and Residential Systems in the Laboratory and Field  

Science Conference Proceedings (OSTI)

Heat pump water heaters (HPWHs) provide electric water heating at a much greater overall efficiency than conventional electric resistance systems. In the residential market, approximately half of all water heaters are electric resistance; these systems can be replaced by HPWHs in most applications with expected savings of 30%60%. In commercial applications, most systems presently use natural gas or another fuel in direct combustion. Emerging HPWH systems are now able to provide water heating ...

2013-12-20T23:59:59.000Z

233

Triple loop heat exchanger for an absorption refrigeration system  

DOE Patents (OSTI)

A triple loop heat exchanger for an absorption refrigeration system is disclosed. The triple loop heat exchanger comprises portions of a strong solution line for conducting relatively hot, strong solution from a generator to a solution heat exchanger of the absorption refrigeration system, conduit means for conducting relatively cool, weak solution from the solution heat exchanger to the generator, and a bypass system for conducting strong solution from the generator around the strong solution line and around the solution heat exchanger to an absorber of the refrigeration system when strong solution builds up in the generator to an undesirable level. The strong solution line and the conduit means are in heat exchange relationship with each other in the triple loop heat exchanger so that, during normal operation of the refrigeration system, heat is exchanged between the relatively hot, strong solution flowing through the strong solution line and the relatively cool, weak solution flowing through the conduit means. Also, the strong solution line and the bypass system are in heat exchange relationship in the triple loop heat exchanger so that if the normal flow path of relatively hot, strong solution flowing from the generator to an absorber is blocked, then this relatively, hot strong solution which will then be flowing through the bypass system in the triple loop heat exchanger, is brought into heat exchange relationship with any strong solution which may have solidified in the strong solution line in the triple loop heat exchanger to thereby aid in desolidifying any such solidified strong solution.

Reimann, Robert C. (Lafayette, NY)

1984-01-01T23:59:59.000Z

234

A Study of CloudGenerated Radiative Heating and Its Generation of Available Potential Energy. Part I: Theoretical Background  

Science Conference Proceedings (OSTI)

The theory is presented of the effect of radiative heating and cooling by clouds on the available potential energy (APE). This provides a measure of the influence of clouds on the general circulation. Absorption and scattering of solar radiation ...

R. Stuhlmann; G. L. Smith

1988-12-01T23:59:59.000Z

235

Modeling near-field radiative heat transfer from sharp objects using a general three-dimensional numerical scattering technique  

E-Print Network (OSTI)

We develop a general numerical method to calculate the nonequilibrium radiative heat transfer between a plate and compact objects of arbitrary shapes, making the first accurate theoretical predictions for the total heat ...

McCauley, Alexander Patrick

236

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

237

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.

238

Scale Dependence of Solar Heating Rates in Convective Cloud Systems with Implications to General Circulation Models  

Science Conference Proceedings (OSTI)

The authors examine 3D solar radiative heating rates within tropical convectivecirrus systems to identify the scales that contribute significantly to the spatial average over a climate models grid cell (i.e., its grid mean), and determine their ...

A. M. Vogelmann; V. Ramanathan; I. A. Podgorny

2001-04-01T23:59:59.000Z

239

Plate heat exchanger system largest in United States  

SciTech Connect

This article focuses on the largest plate heat exchanger system in the USA having 70,000 sq. ft. of surface area. It is used as a sodium carbonate brine heat exchanger at the Kerr-McGee Chemical Corporation's Argus facility at Searles Valley in California's Mojave Desert. The heat interchange process and operation are discussed. Plate heat exchangers were found to be more cost effective than conventional heat exchangers in the process.

Canning, T. (Kerr-McGee Chemical Corp., Trona, CA); Regan, J.T.

1982-08-01T23:59:59.000Z

240

CONTROL OF SUPPLY TEMPERATURE IN DISTRICT HEATING SYSTEMS  

E-Print Network (OSTI)

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

Note: This page contains sample records for the topic "radiator heating systems" 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

Inductively heated particulate matter filter regeneration control system  

Science Conference Proceedings (OSTI)

A system includes a particulate matter (PM) filter with an upstream end for receiving exhaust gas, a downstream end and zones. The system also includes a heating element. A control module selectively activates the heating element to inductively heat one of the zones.

Gonze, Eugene V; Paratore Jr., Michael J; Kirby, Kevin W; Phelps, Amanda; Gregoire, Daniel J

2012-10-23T23:59:59.000Z

242

Device for calibrating a radiation detector system  

DOE Patents (OSTI)

A device for testing a radiation detector system that includes at least two arrays of radiation detectors that are movable with respect to each other. The device includes a "shield plate" or shell, and an opposing "source plate" containing a source of ionizing radiation. Guides are attached to the outer surface of the shell for engaging the forward ends of the detectors, thereby reproducibly positioning the detectors with respect to the source and with respect to each other, thereby ensuring that a predetermined portion of the radiation emitted by the source passes through the shell and reaches the detectors. The shell is made of an hydrogenous material having approximately the same radiological attenuation characteristics as composite human tissue. The source represents a human organ such as the lungs, heart, kidneys, heart, liver, spleen, pancreas, thyroid, testes, prostate, or ovaries. The source includes a source of ionizing radiation having a long half-life and an activity that is within the range typically searched for in human subjects.

Mc Fee, Matthew C. (New Ellenton, SC); Kirkham, Tim J. (Beech Island, SC); Johnson, Tippi H. (Aiken, SC)

1994-01-01T23:59:59.000Z

243

Device for calibrating a radiation detector system  

DOE Patents (OSTI)

A device is disclosed for testing a radiation detector system that includes at least two arrays of radiation detectors that are movable with respect to each other. The device includes a ''shield plate'' or shell, and an opposing ''source plate'' containing a source of ionizing radiation. Guides are attached to the outer surface of the shell for engaging the forward ends of the detectors, thereby reproducibly positioning the detectors with respect to the source and with respect to each other, thereby ensuring that a predetermined portion of the radiation emitted by the source passes through the shell and reaches the detectors. The shell is made of an hydrogenous material having approximately the same radiological attenuation characteristics as composite human tissue. The source represents a human organ such as the lungs, heart, kidneys, liver, spleen, pancreas, thyroid, testes, prostate, or ovaries. The source includes a source of ionizing radiation having a long half-life and an activity that is within the range typically searched for in human subjects. 3 figures.

McFee, M.C.; Kirkham, T.J.; Johnson, T.H.

1994-12-27T23:59:59.000Z

244

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

245

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

246

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 calculation, it illuminates that the post-located auxiliary heat source cheaper and superior to the fore-located one.

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

2006-01-01T23:59:59.000Z

247

Combined heat recovery and make-up water heating system  

Science Conference Proceedings (OSTI)

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

248

Restaurateur designs and installs passive solar heating/cooling system  

SciTech Connect

An example of the use of passive solar heating and cooling systems by a Wisconsin restaurateur is discussed. The greenhouse effect is used on three sides of the restaurant's exterior walls. A dozen water-to-air electric heat pumps handle the restaurant's heating and cooling chores. The system doesn't require any fossil fuel for heating or cooling.

1983-04-01T23:59:59.000Z

249

Water-Loop Heat Pump Systems: Assessment Study Update  

Science Conference Proceedings (OSTI)

Water-loop heat pump systems, composed of multiple water-source heat pumps, a boiler, and a cooling tower operating in a closed water loop are a key segment of the commercial building heat pump market. This type of system provides a low-first-cost, versatile, and energy-efficient approach to space conditioning commercial buildings that have simultaneous heating and cooling loads.

1991-10-25T23:59:59.000Z

250

Investigation of a novel faade-based solar loop heat pipe water heating system.  

E-Print Network (OSTI)

??Solar thermal is one of the most cost-effective renewable energy technologies, and solar water heating is one of the most popular solar thermal systems. Based (more)

Wang, Zhangyuan

2012-01-01T23:59:59.000Z

251

High-Fidelity Multi-Phase Radiation Module for Modern Coal Combustion Systems  

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

Task Task Description Sample calculations LBL-PMC Future Work High-Fidelity Multi-Phase Radiation Module for Modern Coal Combustion Systems Jian Cai 1 Ricardo Marquez 1 Michael F. Modest 2 1 Postdoctoral Research Associate 2 Shaffer and George Professor of Engineering University of California Merced Merced, CA 95343, USA DE-FG26-10FE0003801 May 2012 - Pittsburgh 2/17 Introduction Task Description Sample calculations LBL-PMC Future Work Radiation Challenges in Multi-Phase Reacting Flows Radiative heat transfer in high temperature combustion systems Thermal radiation becomes very important at elevated temperatures Coal and hydrocarbon fuels C n H m → H 2 O, CO 2 , CO, NO x , soot, char, ash CO 2 , H 2 O, soot, char and ash strongly emit and absorb radiative energy (lower temperature levels) Radiative effects are conveniently ignored or treated with very crude models Neglecting

252

Water-Loop Heat Pump Systems: Volumes 1 and 2  

Science Conference Proceedings (OSTI)

Water-loop heat pump (WLHP) systems are reliable, versatile, energy-efficient alternatives to conventional systems such as packaged rooftop or central chiller systems. These systems offer low installed costs, unparalleled design flexibility, and an inherent ability to recover heat in a variety of commercial and multifamily residential buildings for both new construction and retrofit markets.

1993-04-01T23:59:59.000Z

253

Experimental Research of an Active Solar Heating System  

E-Print Network (OSTI)

: Solar is an abundant renewable energy, which is used more and more frequently with the emphasis on environment protection, especially in building heating. The different devised methods between an active solar heating system and normal heating 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 and heating system in order to achieve the best state of comfort and energy savings. The real cost of running is calculated and compared with that of other heating methods. The traits and the scope of applications of the solar heating system and the problems in designing, installing and operating are indicated in this paper.

Gao, X.; Li, D.

2006-01-01T23:59:59.000Z

254

Supporting Equipment for Heating and Cooling Systems  

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

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.

255

Overview: Home Heating Systems | Department of Energy  

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

- 8:17am Addthis Home heating accounts for about 30 percent of the energy used in the home. | Photo courtesy iStockphoto.com Home heating accounts for about 30 percent of the...

256

Optical Transition Radiation System for ATF2  

SciTech Connect

In this paper we present the first measurements performed during the fall 2010 and early 2011 runs. Software development, simulations and hardware improvements to the Multi-Optical Transition Radiation System installed in the beam diagnostic section of the Extraction line of ATF2 are described. 2D emittance measurements have been performed and the system is being routinely used for coupling correction. Realistic beam simulations have been made and compared with the measurements. A demagnifier lens system to improve the beam finding procedure has been designed and will be implemented in a future run. We also discuss further work planned for the subsequent run periods.

Alabau-Gonzalvo, J.; Gutierrez, C.Blanch; Faus-Golfe, A.; Garcia-Garrigos, J.J.; /Valencia U., IFIC; Cruz, J.; McCormick, D.; White, G.; Woodley, M.; /SLAC

2012-02-14T23:59:59.000Z

257

HEAT TRANSFER AND TRITIUM PRODUCING SYSTEM  

DOE Patents (OSTI)

This invention related to a circulating lithium-containing blanket system in a neution source hav'ing a magnetic field associated therewith. The blanket serves simultaneously and efficiently as a heat transfer mediunm and as a source of tritium. The blanket is composed of a lithium-6-enriched fused salt selected from the group consisting of lithium nitrite, lithium nitrate, a mixture of said salts, a mixture of each of said salts with lithium oxide, and a mixture of said salts with each other and with lithium oxide. The moderator, which is contained within the blanket in a separate conduit, can be water. A stellarator is one of the neutron sources which can be used in this invention. (AEC)

Johnson, E.F.

1962-06-01T23:59:59.000Z

258

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

coil (G) of the absorption chiller (or boiler of a Rankineor heat input to the absorption chiller of approximately

Dols, C.

2010-01-01T23:59:59.000Z

259

Design and analysis of a radiatively-cooled, inertially-driven nuclear generator system for space-based applications  

Science Conference Proceedings (OSTI)

The RING (Radiatively-Cooled, Inertially-Driven Nuclear Generator) radiator is proposed as a novel heat rejection system for advanced space reactor power applications in the 1 to 25 MW(t) range. The RING radiator system employs four counter-rotating, hollow, cylindrical, ring-shaped tubes filled with liquid lithium. The rings pass through a cavity heat exchanger, absorb heat, and then re-radiate that absorbed heat to space. Each ring is made of thin-walled, corrugated Nb-1%Zr tubing with external fins, segmented to minimize the consequence of coolant loss. To examine both the system transient and steady-state thermal hydraulic response, a set of detailed, analytical computer codes was developed (RINGSYS-System Thermal Hydraulics and Power Rating/RINGDYN-System Dynamics/RINGRAD-Radiation Damage and Void Gas Formation/RINGDATG-Data Handling). An additional code (TEMPEST) was obtained to examine the impact of augmented, internal ring convective heat transfer on overall system performance. Performance results and a cumulative uncertainty analysis including analytical, computational, property, and environmental condition errors are presented. The optimized radiator configuration at a cavity temperature of 1500 K results in a 3.3 MW(t) heat removal capacity at a minimum radiator weight ratio of 2.1 kg/kW(t); or a radiator weight ratio of 4.0 kg/kW(t) at a maximum achievable capacity of 5.6 MW(t). Despite a higher kg/kW(t) ratio than reported for other comparable temperature radiator designs, the concept is an attractive option for use with high-temperature reactors in high or geosynchronous earth orbit, specifically where the essential design criteria emphasize reliability, safety, and repairability. This dissertation also describes the confirmatory research, especially related to the material and thermal characteristics of key components, necessary to ensure successful RING radiator system deployment.

Apley, W.J.

1989-01-01T23:59:59.000Z

260

Surface Energy and Radiation Balance Systems: General Description and Improvements  

Science Conference Proceedings (OSTI)

Surface evaluation of sensible and latent heat flux densities and the components of the radiation balance were desired for various vegetative surfaces during the ASCOT84 experiment to compare with modeled results and to relate these values to ...

Leo J. Fritschen; James R. Simpson

1989-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

Transient heat pipe investigations for space power systems  

SciTech Connect

A 4-meter long, high temperature, high power, molybdenum-lithium heat pipe has been fabricated and tested in transient and steady state operation at temperatures to 1500 K. Maximum power throughput during the tests was approximately 37 kW/cm/sup 2/ for the 1.4 cm diameter vapor space of the annular wick heat pipe. The evaporator flux density for the tests was 150.0 W/cm/sup 2/ over a length of 40 cm. Condenser length was approximately 3.0 m with radiant heat rejection from the condenser to a coaxial, water cooled radiation calorimeter. A variable radiation shield, controllable from the outside of the vacuum enclosure, was used to vary the load on the heat pipe during the tests. 1 ref., 9 figs.

Merrigan, M.A.; Keddy, E.S.; Sena, J.T.

1985-01-01T23:59:59.000Z

262

PROBLEM 13.71 KNOWN: Steam producing still heated by radiation.  

E-Print Network (OSTI)

PROBLEM 13.71 KNOWN: Steam producing still heated by radiation. FIND: (a) Factor by which the vapor ..... Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis to calculate F12. Excerpts from this work may be reproduced by instructors for distribution on a not

Rothstein, Jonathan

263

Influences of biomass heat and biochemical energy storages on the land surface fluxes and radiative temperature  

E-Print Network (OSTI)

Influences of biomass heat and biochemical energy storages on the land surface fluxes and radiative energy storages for land-atmosphere interactions, an issue that has been largely neglected so far. We the representation of biomass energy storages against measurements of surface energy and CO2 fluxes. We

264

Transient performance investigation of a space power system heat pipe  

SciTech Connect

Start-up, shut-down, and peak power tests have been conducted with a molybdenum-lithium heat pipe at temperatures to 1500 K. The heat pipe was radiation coupled to a water cooled calorimeter for the tests with rf induction heating used for the input to the evaporator region. Maximum power throughput in the tests was 36.8 kw corresponding to a power density of 23 kw/cm/sup 2/ for the 1.4 cm diameter vapor space of the annular wick heat pipe. The corresponding evaporator flux density was approximately 150 w/cm/sup 2/ over an evaporator length of 40 cm at peak power. Condenser length for the tests was approximately 3.0 m. A variable geometry radiation shield was used to vary the load on the heat pipe during the tests. Results of the tests showed that liquid depletion in the evaporator region of the heat pipe could occur in shut-down and prevent restart of the heat pipe. Changes in surface emissivity of the heat pipe condenser surface were shown to affect the shut-down and re-start limits. 12 figs.

Merrigan, M.A.; Keddy, E.S.; Sena, J.T.

1986-01-01T23:59:59.000Z

265

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

266

Modelling and computation for designs of multistage heat exchanger systems  

Science Conference Proceedings (OSTI)

A multistage heat exchanger system is formed when it is desired to heat a single cold fluid stream with the help of several available hot streams. Usually only one specific size combination will lead to total minimum cost. The determination of these ... Keywords: Heat Exchangers, multistage, optimisation

A. Malhotra; S. B. Muhaddin

1990-12-01T23:59:59.000Z

267

Solar heating and cooling systems design and development: quarterly report  

DOE Green Energy (OSTI)

This program calls for the development and delivery of eight prototype solar heating and cooling systems for installation and operational test. Two heating and six heating and cooling units will be delivered for single-family residences, multiple-family residences and commercial applications. This document describes the progress of the program during the fifth program quarter, 1 July 1977 to 30 September 1977.

Not Available

1977-11-11T23:59:59.000Z

268

Solar heating and cooling systems design and development: quarterly report  

DOE Green Energy (OSTI)

The progress of the program for the development and delivery of eight prototype solar heating and cooling systems for installation and operational test is described for the period, 1 January 1978 through 31 March 1978. Two heating and six heating and cooling units will be delivered for single-family residences, multiple-family residences, and commercial applications.

Not Available

1978-07-01T23:59:59.000Z

269

Numerical heat transfer attic model using a radiant barrier system  

Science Conference Proceedings (OSTI)

A two-dimensional, steady-state finite-element model was developed to simulate the thermal effects of the application of an attic radiant barrier system (ARBS) inside a ventilated residential attic. The attic is ventilated using the exhaust air from an evaporative cooler. The study uses a {kappa}-{epsilon} turbulent model to describe the velocity and temperature distributions in the attic. The ambient temperature and solar isolation densities on the outside inclined attic surfaces are used as driving functions for the model. The model also included the appropriate heat exchange modes of convection and radiation on these outside surfaces. Several recirculation zones were visually observed in the attic flow pattern. Also, the use of the ARBS seems to lower the heat transfer through the ceiling by 25--30%, but this effect decreases significantly as the outside ventilation rates are increased through the attic space. The 2D model revealed some interesting temperature distributions along the attic surfaces that could not have been predicted by the one-dimensional models. The lower emissivity ARBS seems to raise the temperature of the inclined attic surfaces as well as the temperature of the exhausted ventilation air.

Moujaes, S.F.; Alsaiegh, N.T.

2000-04-01T23:59:59.000Z

270

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

271

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 not supplied to the grid is analyzed in detail. Further, the new concept of CCHP system with cooling and heating network interconnecting is developed. Then, the Olympic Park energy system is presented to illustrate the advantage and improvement both in economy performance and energy efficiency.

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

2006-01-01T23:59:59.000Z

272

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

273

Heat transfer performance of an external receiver pipe under unilateral concentrated solar radiation  

Science Conference Proceedings (OSTI)

The heat transfer and absorption characteristics of an external receiver pipe under unilateral concentrated solar radiation are theoretically investigated. Since the heat loss ratio of the infrared radiation has maximum at moderate energy flux, the heat absorption efficiency will first increase and then decrease with the incident energy flux. The local absorption efficiency will increase with the flow velocity, while the wall temperature drops quickly. Because of the unilateral concentrated solar radiation and different incident angle, the heat transfer is uneven along the circumference. Near the perpendicularly incident region, the wall temperature and absorption efficiency slowly approaches to the maximum, while the absorption efficiency sharply drops near the parallelly incident region. The calculation results show that the heat transfer parameters calculated from the average incident energy flux have a good agreement with the average values of the circumference under different boundary conditions. For the whole pipe with coating of Pyromark, the absorption efficiency of the main region is above 85%, and only the absorption efficiency near the parallelly incident region is below 80%. In general, the absorption efficiency of the whole pipe increases with flow velocity rising and pipe length decreasing, and it approaches to the maximum at optimal concentrated solar flux. (author)

Jianfeng, Lu; Jing, Ding [School of Engineering, Sun Yat-Sen University, Guangzhou 510006 (China); Jianping, Yang [Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education, South China University of Technology, Guangzhou 510640 (China)

2010-11-15T23:59:59.000Z

274

A CLASSIFICATION SCHEME FOR THE COMMON PASSIVE AND HYBRID HEATING AND COOLING SYSTEMS  

E-Print Network (OSTI)

EXAMPLES OF PASSIVE SOLAR HEATING SYSTEMS {CONVECTIVE SPACEbeen supported by the Solar Heating and Cooling Research andinteraction. Passive solar heating systems use elements of

Holtz, Michael J.

2011-01-01T23:59:59.000Z

275

TWO WELL STORAGE SYSTEMS FOR COMBINED HEATING AND AIRCONDITIONING BY GROUNDWATER HEATPUMPS IN SHALLOW AQUIFERS  

E-Print Network (OSTI)

since during the heating season the solar radiation is atHeating and cooling demand compared with air temperature and solarHeating and cooling demand compared with air temperature and solar

Pelka, Walter

2010-01-01T23:59:59.000Z

276

Application of district heating system to U. S. urban areas  

DOE Green Energy (OSTI)

In the last few decades district-heating systems have been widely used in a number of European countries using waste heat from electric generation or refuse incineration, as well as energy from primary sources such as geothermal wells or fossil-fired boilers. The current world status of district-heat utilization is summarized. Cost and implementation projections for district-heating systems in the U. S. are discussed in comparison with existing modes of space conditioning and domestic water heating. A substantial fraction, i.e., up to approximately one-half of the U.S. population could employ district-heating systems using waste heat, with present population-distribution patterns. U.S. energy usage would be reduced by an equivalent of approximately 30 percent of current oil imports. Detailed analyses of a number of urban areas are used to formulate conceptual district energy-supply systems, potential implementation levels, and projected energy costs. Important national ancillary economic and social benefits are described, and potential difficulties relating to the implementation of district-heating systems in the U.S. are discussed. District-heating systems appear very attractive for meeting future U.S. energy needs. The technology is well established. The cost/benefit yield is favorable, and the conservation potential is significant. District heating can be applied in urban and densely populated suburban areas. The remaining demand, in rural and low-population-density communities, appears to be better suited to other forms of system substitution.

Karkheck, J.; Powell, J.

1978-01-01T23:59:59.000Z

277

Ecological and Economical efficient Heating and Cooling by innovative Gas Motor Heat Pump Systems and Solutions  

E-Print Network (OSTI)

options ·Universal application as an Air-Air System (VRF), Air-Water System or combined as a Mixed System application options · Option 1: Air-Air System (VRF) #12;· Option 2: Air-Air System (HVAC System) Gas Heat

Oak Ridge National Laboratory

278

Save Energy Now in Your Process Heating Systems  

Science Conference Proceedings (OSTI)

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

279

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 (more)

Grabowiecki, Piotr

2010-01-01T23:59:59.000Z

280

Retrofitting Combined Space and Water Heating Systems: Laboratory Tests  

SciTech Connect

Better insulated and tighter homes can often use a single heating plant for both space and domestic water heating. These systems, called dual integrated appliances (DIA) or combination systems, can operate at high efficiency and eliminate combustion safety issues associated by using a condensing, sealed combustion heating plant. Funds were received to install 400 DIAs in Minnesota low-income homes. The NorthernSTAR DIA laboratory was created to identify proper system components, designs, operating parameters, and installation procedures to assure high efficiency of field installed systems. Tests verified that heating loads up to 57,000 Btu/hr can be achieved with acceptable return water temperatures and supply air temperatures.

Schoenbauer, B.; Bohac, D.; Huelman, P.; Olson, R.; Hewitt, M.

2012-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

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

Open Energy Info (EERE)

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...

282

Heat transfer characteristics of a fluidized bed : stirling engine system.  

E-Print Network (OSTI)

??A fluidized bed combustion (FBC) system was designed to provide heat energy to the head of a Stirling cycle engine. Preliminary testing with a simulated (more)

Anzalone, Thomas M.

1989-01-01T23:59:59.000Z

283

Electrotechnologies in Metal Heat Treating Systems -- Marketing Kit  

Science Conference Proceedings (OSTI)

Due to the increased demand for lighter and stronger materials and assemblies, the practice of heat treating to improve material mechanical properties is expected to expand to an even greater number of end products. This heat treating marketing kit is designed to help utility sales and marketing personnel perform a progressive analysis of electrotechnology applications in heat treating systems. The kit is designed for utility personnel who have limited knowledge of the heat treating industry and for indu...

2000-07-27T23:59:59.000Z

284

System manual for the University of Pennsylvania retrofitted solar heated Philadelphia row home (SolaRow)  

DOE Green Energy (OSTI)

The University of Pennsylvania SolaRow house, an urban row home retrofitted for comfort and domestic hot water heating, was extensively instrumented for performance monitoring and acquisition of weather and solar radiation data. This report describes the heating and instrumentation systems, provides the details for instrumentation, piping and valve identification, and specifies the operation and maintenance of the heating and data acquisition systems. The following are included: (1) system flow diagrams; (2) valve and cable identification tables; (3) wiring diagrams; and (4) start-up, normal operation, shut-down, maintenance and trouble-shooting procedures. It thus provides the necessary technical information to permit system operation and monitoring, overall system performance analysis and optimization, and acquisition of climatological data.

Zinnes, I.; Lior, N.

1980-05-01T23:59:59.000Z

285

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

286

Low Temperature Heat Recovery for Boiler Systems  

E-Print Network (OSTI)

Low temperature corrosion proof heat exchangers designed to reduce boiler flue gas temperatures to 150F or lower are now being commercially operated on gas, oil and coal fired boilers. These heat exchangers, when applied to boiler flue gas, are commonly called condensing economizers. It has traditionally been common practice in the boiler industry to not reduce flue gas temperatures below the 300F to 400F range. This barrier has now been broken by the development and application of corrosion proof heat exchanger technology. This opens up a vast reservior of untapped recoverable energy that can be recovered and reused as an energy source. The successful recovery of this heat and the optimum use of it are the fundemental goals of the technology presented in this paper. This Recovered Low Level Heat Is Normally Used To Heat Cold Make-up Water Or Combustion Air.

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

1986-06-01T23:59:59.000Z

287

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

288

Alloy Parts Heat Treatment Temperature Monitoring System  

Science Conference Proceedings (OSTI)

Abstract Scope, The paper provides an automatic solution for monitoring and managing the heat treatment of drill pipes. It improves the efficiency and accuracy ...

289

Advanced Manufacturing Office: Process Heating Systems  

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

Boiler Tune-Up Energy-Efficiency Opportunity Assessment Tool for Chemical Plants and Refineries Mechanical Insulation Assessment and Design Calculators Combined Heat and Power...

290

Original article: Comparison of numerical models in radiative heat transfer with application to circuit-breaker simulations  

Science Conference Proceedings (OSTI)

Two different modeling approaches for the numerical computation of the radiation energy exchange in the context of the simulation of high-voltage circuit breakers are investigated. These are the basic Radiative Transfer Equation method and the P1 model ... Keywords: CFD modeling, Circuit breakers, Finite volume discretization, P1 model, Radiative heat transfer

Matthieu Melot; Jean-Yves TrPanier; Ricardo Camarero; Eddy Petro

2012-08-01T23:59:59.000Z

291

Development and extended operation of a high power radiation loaded heat pipe  

SciTech Connect

A high temperature, high power molybdenum-lithium heat pipe has been fabricated and tested at 1500 K for 1700 hours with radiant heat rejection. Power throughput during the test was approximately 14 kW, corresponding to an axial flux density of 11 kW/cm/sup 2/ for the 1.59 cm diameter heat pipe. Radial flux density was 70 W/cm/sup 2/ over an evaporator length of 40.0 cm. Condenser length was approximately 150 cm with radiant heat rejection from the condenser to a coaxial water cooled radiation calorimeter. A plasma sprayed, high emissivity coating was used on the condenser surface to increase the radiant heat rejection during the tests. The heat pipe was operated for 514 hours at steady state conditions before being damaged during a planned shutdown for test equipment maintenance. The damage was repaired and the initial 1000 hour test period completed without further incident. After physical examination of the heat pipe at 1000 hours the test was resumed and the heat pipe operated at the same conditions for an additional 700 hours before conclusion of this test phase.

Merrigan, M.A.; Keddy, E.S.; Runyan, J.R.; Martinez, H.E.

1984-06-01T23:59:59.000Z

292

Hybrid Radiator-Cooling System (ANL-IN-11-096)  

fully-loaded truck climbing up Baker Grade on the hottest summer day. The coolant system, including radiator, is sized to remove 100% of the required heat from the engine at the design condition without boiling the coolant, which results in a large ...

293

Design and operation of solar thermal heat transfer systems  

Science Conference Proceedings (OSTI)

The importance of heat transfer systems in the collection and use of solar energy is discussed. The success or failure of many solar energy systems has been determined by the design of the heat transfer system. This report includes a short summary of some of the DOE sponsored solar industrial process heat sites. From the design, construction, and operation of these systems many lessons were learned which will be important to designers and potential users of solar thermal systems. Also included is a discussion of solar collector foundation over-design that has increased the collector system costs.

Rush, E.E.

1985-01-01T23:59:59.000Z

294

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

295

Performance comparison between air and liquid residential solar heating systems  

SciTech Connect

Comparisons of system performance for the flat plate liquid-heating system in CSU Solar House I, the evacuated-tube collector system in Solar House I, and the flat plate air-heating system in CSU Solar House II are described for selected months of the 1976 and 1977 heating seasons. Only space and domestic water heating data are compared. The flat plate air- and liquid-heating collectors operating with complete heating systems have nearly equal efficiencies when based upon solar flux while the collector fluids are flowing, but approximately 40% more energy is collected during a heating season with the air-heating system because the air system operates over a longer period of the day. On the basis of short-term data, the evacuated tube collector array on Solar House I is about 27% more efficient than the flat plate air-heating collector array on Solar House II based on gross roof area occupied by the collectors and manifolds.

Karaki, S.; Duff, W.S.; Loef, G.O.G.

1978-01-01T23:59:59.000Z

296

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

297

Radiation in Systems with Near Zero Dielectric Constant  

E-Print Network (OSTI)

We discuss radiation effects in systems with near zero dielectric constant. An enhancement of intensity by example of transition and diffusive radiations is demonstrated. A sharp peak in the transition radiation spectral-angular intensity is predicted. Numerical estimates for specific systems are made and possible applications are discussed.

Arakelian, V H

2010-01-01T23:59:59.000Z

298

Radiators  

SciTech Connect

A heat-exchange radiator is connected to a fluid flow circuit by a connector which provides one member of an interengageable spigot and socket pair for push-fit, fluid-tight, engagement between the connector and the radiator, with latching formations at least one of which is resilient. Preferably the connector carries the spigot which tapers and engages with a socket of corresponding shape, the spigot carrying an O-ring seal and either latching fingers or a resilient latching circlip.

Webster, D. M.

1985-07-30T23:59:59.000Z

299

Residential space heating cost: geothermal vs conventional systems  

SciTech Connect

The operating characteristics and economies of several representative space heating systems are analyzed. The analysis techniques used may be applied to a larger variety of systems than considered herein, thereby making this document more useful to the residential developer, heating and ventilating contractor, or homeowner considering geothermal space heating. These analyses are based on the use of geothermal water at temperatures as low as 120/sup 0/F in forced air systems and 140/sup 0/F in baseboard convection and radiant floor panel systems. This investigation indicates the baseboard convection system is likely to be the most economical type of geothermal space heating system when geothermal water of at least 140/sup 0/F is available. Heat pumps utilizing water near 70/sup 0/F, with negligible water costs, are economically feasible and they are particularly attractive when space cooling is included in system designs. Generally, procurement and installation costs for similar geothermal and conventional space heating systems are about equal, so geothermal space heating is cost competitive when the unit cost of geothermal energy is less than or equal to the unit cost of conventional energy. Guides are provided for estimating the unit cost of geothermal energy for cases where a geothermal resource is known to exist but has not been developed for use in residential space heating.

Engen, I.A.

1978-02-01T23:59:59.000Z

300

Renewable energy of waste heat recovery system for automobiles  

Science Conference Proceedings (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

Cheng-Ting Hsu; Da-Jeng Yao; Ke-Jyun Ye; Ben Yu

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

Special Property Assessment for Renewable Heating & Cooling Systems  

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

Title 8 of Marylands 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...

302

Intelligent Control of Heating, Ventilating and Air Conditioning Systems  

Science Conference Proceedings (OSTI)

This paper proposed a simulation-optimization energy saving strategy for heating, ventilating and air conditioning (HVAC) systems' condenser water loop through intelligent control of single speed cooling towers' components. An analysis of system components ...

Patrick Low Kie; Lau Bee Theng

2009-07-01T23:59:59.000Z

303

RANKINE CYCLE WASTE HEAT RECOVERY SYSTEM - Energy Innovation Portal  

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 ...

304

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

305

Heating and cooling of a two-dimensional electron gas by terahertz radiation  

Science Conference Proceedings (OSTI)

The absorption of terahertz radiation by free charge carriers in n-type semiconductor quantum wells accompanied by the interaction of electrons with acoustic and optical phonons is studied. It is shown that intrasubband optical transitions can cause both heating and cooling of the electron gas. The cooling of charge carriers occurs in a certain temperature and radiation frequency region where light is most efficiently absorbed due to intrasubband transitions with emission of optical phonons. In GaAs quantum wells, the optical cooling of electrons occurs most efficiently at liquid nitrogen temperatures, while cooling is possible even at room temperature in GaN heterostructures.

Budkin, G. V.; Tarasenko, S. A., E-mail: tarasenko@coherent.ioffe.ru [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation)

2011-04-15T23:59:59.000Z

306

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

E-Print Network (OSTI)

For higher solar fraction and suitability for both heating and cooling, a solar heat pump system with seasonal storage was studied in this paper. The system scheme and control strategy of a solar heat pump system with seasonal storage for heating 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, operating modes and weather conditions. The results show that 1) for most areas of China, the solar systems with seasonal storage can save energy; 2) for areas with cold winter and hot summer, it is suitable to store heat from summer to winter and store cold energy from winter to summer, but for chilly areas, it is suitable to only store heat from summer to winter; 3) when the ratio of volume of seasonal storage tank to collector areas is 2~3, the system performance is optimal and the payback period is shortest for most areas of north China; and 4) if cooling storage is needed, the seasonal storage coupled with short-term storage may raise the solar fraction largely.

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

2006-01-01T23:59:59.000Z

307

Preliminary design package for prototype solar heating system  

DOE Green Energy (OSTI)

A summary is given of the preliminary analysis and design activity on solar heating systems. The analysis was made without site specific ata other than weather; therefore, the results indicate performance expected under these special conditions. Major items in this report include systeem candidates, design approaches, trade studies and other special data required to evaluate the preliminary analysis and design. The program calls for the development and delivery of eight prototype solar heating and coolin systems for installation and operational test. Two-heating and six heating and cooling units will be delivered for Single Family Residences (SFR), Multi-Family Residences (MFR) and commercial applications.

Not Available

1978-12-01T23:59:59.000Z

308

Preliminary design package for prototype solar heating and cooling systems  

DOE Green Energy (OSTI)

A summary is presented of the preliminary analysis and design activity on solar heating and cooling systems. The analysis was made without site specific data other than weather; therefore, the results indicate performance expected under these special conditions. Major items in this report include a market analysis, design approaches, trade studies and other special data required to evaluate the preliminary analysis and design. The program calls for the development and delivery of eight prototype solar heating and cooling systems for installation and operational test. Two heating and six heating and cooling units will be delivered for Single Family Residences (SFR), Multiple-Family Residences (MFR), and commerical applications.

Not Available

1978-12-01T23:59:59.000Z

309

Analysis of a heat exchanger-thermoelectric generator system  

DOE Green Energy (OSTI)

Analysis of a thermoelectric generator (TEG) in an ocean thermal energy conversion (OTEC) application is presented. An analytic model is developed for describing the heat exchanger-TEG interactions. This model is used to illustrate limitations of applying conventional fixed junction temperature assumptions to systems experiencing significant temperature drops across the heat exchanger surfaces. Design methods are developed for determining the thermoelectric element geometry that produces maximum output power. Results show that a heat exchanger-TEG system may deliver about 100 W/m/sup 2/ of heat exchanger surface. This compares favorably with conventional OTEC schemes.

Henderson, J.

1979-01-01T23:59:59.000Z

310

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.

311

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.

312

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.

313

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 +

314

Integrated heat pipe-thermal storage system performance evaluation  

SciTech Connect

Performance verification tests of an integrated heat pipe-thermal energy storage system have been conducted. This system is being developed as a part of an Organic Rankine Cycle-Solar Dynamic Power System (ORC-SDPS) receiver for future space stations. The integrated system consists of potassium heat pipe elements that incorporate thermal energy storage (TES) canisters within the vapor space along with an organic fluid (toluene) heater tube used as the condenser region of the heat pipe. During the insolation period of the earth orbit, solar energy is delivered to the surface of the heat pipe elements of the ORC-SDPS receiver and is internally transferred by the potassium vapor for use and storage. Part of the thermal energy is delivered to the heater tube and the balance is stored in the TES units. During the eclipse period of the orbit, the stored energy in the TES units is transferred by the potassium vapor to the toluene heater tube. A developmental heat pipe element was fabricated that employs axial arteries and a distribution wick connecting the wicked TES units and the heater to the solar insolation surface of the heat pipe. Tests were conducted to verify the heat pipe operation and to evaluate the heat pipe/TES units/heater tube operation by interfacing the heater unit to a heat exchanger.

Keddy, E.; Sena, J.T.; Merrigan, M.

1987-01-01T23:59:59.000Z

315

Heat pipe technology for coal-fired power systems  

SciTech Connect

This report summarizes the results of heat pipe R and D activities at Argonne National Laboratory (ANL) during the 1977 to 1984 time period. The heat pipe development efforts were associated with a variety of DOE supported projects involving coal-fired prime movers for stationary power generation. The role of heat pipes for these power systems is in their potential application as thermal transport systems for integrating fluidized bed combustors (FBC) with prime movers ranging from Stirling engines in total energy systems (approx.10 MWe) to closed-cycle gas turbines in central power plants (approx.1000 MWe). The results of initial investigations at ANL demonstrated that high-temperature sodium heat pipes provided the best heat exchanger technology for integrating Stirling engines with coal-fired FBC systems. A major accomplishment included the development and validation of a computer code (ANL/HTP) which calculates heat pipe operating limits and other significant characteristics necessary for power plant design. A number of developmental and prototype heat pipes were designed and fabricated through a subcontract effort with Thermacore, Inc., and delivered to ANL for performance testing. Preliminary test results from ANL's Heat Pipe Test Facility, using induction heating and a gas-water calorimeter to establish energy balances, are given in the report. Test data obtained to date are consistent with ANL/HTP code predictions. 47 refs., 53 figs., 22 tabs.

Uherka, K.L.; Holtz, R.E.; McLennan, G.A.; Koehl, E.R.

1985-04-01T23:59:59.000Z

316

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

Science Conference Proceedings (OSTI)

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

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

2011-03-01T23:59:59.000Z

317

Comparison of Simulated and Observed Continental Tropical Anvil Clouds and Their Radiative Heating Profiles  

Science Conference Proceedings (OSTI)

Vertically pointing millimeter-wavelength radar observations of anvil clouds extending from mesoscale convective systems (MCSs) that pass over an Atmospheric Radiation Measurement Program (ARM) field site in Niamey, Niger, are compared to anvil ...

Scott W. Powell; Robert A. Houze Jr.; Anil Kumar; Sally A. McFarlane

2012-09-01T23:59:59.000Z

318

Energy and cost analysis of residential heating systems  

SciTech Connect

Several energy-saving design changes in residential space-heating systems were examined to determine their energy-conservation potential and cost effectiveness. Changes in conventional and advanced systems (such as the gas heat pump) were considered. The energy and cost estimates were developed from current literature, conversations with heating and equipment manufacturers and dealers, and discussions with individuals doing research and testing on residential space-heating equipment. Energy savings as large as 26, 20, 57% were estimated for design changes in conventional gas, oil, and electric space-heating systems, respectively. These changes increased capital cost of the three systems by 27, 16, and 26%, respectively. For advanced gas and electric systems, energy savings up to 45 and 67%, respectively, were calculated. The design changes needed to produce these energy savings increased capital costs 80 and 35%. The energy use and cost relationships developed for the space heating systems were used as input to the ORNL residential energy-use simulation model to evaluate the effect of space-heating improvements on national energy use to the year 2000. Results indicated a large reduction in national energy use if improved conventional and advanced systems were made available to consumers and if consumers minimized life-cycle costs when purchasing these systems.

O' Neal, D.L.

1978-07-01T23:59:59.000Z

319

Solar-assisted heat pump system for cost-effective space heating and cooling  

DOE Green Energy (OSTI)

The use of heat pumps for the utilization of solar energy is studied. Two requirements for a cost-effective system are identified: (1) a special heat pump whose coefficient of performance continues to rise with source temperature over the entire range appropriate for solar assist, and (2) a low-cost collection and storage subsystem able to supply solar energy to the heat pump efficiently at low temperatures. Programs leading to the development of these components are discussed. A solar assisted heat pump system using these components is simulated via a computer, and the results of the simulation are used as the basis for a cost comparison of the proposed system with other solar and conventional systems.

Andrews, J W; Kush, E A; Metz, P D

1978-03-01T23:59:59.000Z

320

Simplified modeling of solar process heating systems using stochastic weather input  

SciTech Connect

A model has been developed which accurately predicts solar district heating and industrial process heating collection performance on a daily basis. The model is system specific with no storage and constant load return temperature. This model was tested for its statistical significance and found to be highly significant. Performance data to construct the model were generated through numerous TRNSYS runs. Physically important variables were then chosen for inclusion in a statistical regression analysis. The variables, which are readily available on a daily basis, were daily radiation, mean twenty-four hour temperature, and collector and system characteristics. The weather input to the model may be real measured radiation values or artificially generated radiation values. The temperature may be daily averages when real radiation values are used or monthly averages when artificial radiation is used. It is shown that there is little difference in prediction when monthly temperature is used rather than the daily values. The performance model was developed from six months of Toronto, Canada, hourly data. The validation was performed with meteorological year locations, Albuquerque, Seattle, and Miami, chosen for climate diversity. The accuracy was excellent, even on a daily basis. A model was then developed from data of all four locations. The artificial data was tested for prediction accuracy for Toronto. Where the beta distribution fit well, the accuracy was good. Where the beta distribution did not fit as well, the accuracy was acceptable.

Boardman, E.C.

1986-01-01T23:59:59.000Z

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321

Radiative cooling and solar heating potential by using various roofing materials  

Science Conference Proceedings (OSTI)

The results of testing over twenty typical and potential roofing materials such as: corrugated galvanized steel, corrugated clear fiberglass, 90number black roll roofing, 90number green roll roofing, 90number red roll roofing, 90number brown roll roofing, 90number white roll roofing, 240number brown asphalt shingles, anodized aluminum, etc. under exposure to solar and nocturnal sky radiation are presented. Some cadmium sulfite solar cells and silicon solar cells are being tested as potential future roofing panels. Graphs showing the temperature variation of each material versus testing time are given for a heating and a cooling cycle. The environmental conditions of testing such as: solar insolation, apparent sky temperature, ambient air temperature, relative humidity and wind speed are also given. On the basis of preliminary results obtained during the testing of roofing materials, several mini-modules of an integrated collector/radiator/ roof element with the dimensions 0.6 m x 0.6 m (2 ft x 2 ft) were constructed and tested. The thermal response of the mini-modules under solar and nocturnal sky radiation is shown and the testing results are discussed. The spectral transmittance curves for nine transparent cover materials are also presented. The preliminary results indicate that solar radiation and nocturnal sky radiation could be used effectively by employing an integrated collector/radiator structure.

Pytlinski, J.T.; Connell, H.L.; Conrad, G.R.

1980-12-01T23:59:59.000Z

322

Modeling heat conduction and radiation transport with the diffusion equation in  

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

heat conduction and radiation transport with the diffusion equation in NIF ALE-AMR heat conduction and radiation transport with the diffusion equation in NIF ALE-AMR This article has been downloaded from IOPscience. Please scroll down to see the full text article. 2010 J. Phys.: Conf. Ser. 244 022075 (http://iopscience.iop.org/1742-6596/244/2/022075) Download details: IP Address: 50.136.219.251 The article was downloaded on 18/04/2013 at 01:36 Please note that terms and conditions apply. View the table of contents for this issue, or go to the journal homepage for more Home Search Collections Journals About Contact us My IOPscience Modeling Heat Conduction and Radiation Transport with the Diffusion Equation in NIF ALE-AMR A.C. Fisher 1 , D.S. Bailey 1 , T.B. Kaiser 1 , B.T.N. Gunney 1 , N.D. Masters 1 , A.E. Koniges 2 , D.C. Eder 1 , R.W. Anderson 1 1: Lawrence Livermore National Laboratory,

323

Commercial high efficiency dehumidification systems using heat pipes  

SciTech Connect

An improved heat pipe design using separately connected two-section one-way flow heat pipes with internal microgrooves instead of wicks is described. This design is now commercially available for use to increase the dehumidification capacity of air conditioning systems. The design also includes a method of introducing fresh air into buildings while recovering heat and controlling the humidity of the incoming air. Included are applications and case studies, load calculations and technical data, and installation, operation, and maintenance information.

1993-09-01T23:59:59.000Z

324

Solar heating and cooling systems design and development quarterly report  

DOE Green Energy (OSTI)

The program calls for the development and delivery of eight (was 12) prototype solar heating and cooling systems for installation and operational test. Two (was 6) heating and six heating and cooling units will be delivered for single-family residences (SFR), multiple-family residences (MFR) and commercial applications. This document describes the progress of the program during the eighth program quarter, 1 April 1978 to 30 June 1978.

Not Available

1978-07-01T23:59:59.000Z

325

Thermodynamic Analysis of Combined Cycle District Heating System  

E-Print Network (OSTI)

This paper presents a thermodynamic analysis of the University of Massachusetts' Combined Heat and Power (CHP) District Heating System. Energy and exergy analyses are performed based on the first and second laws of thermodynamics for power generation systems that include a 10 MW Solar combustion gas turbine, a 4-MW steam turbine, a 100,000 pph heat recovery steam generator (HRSG), three 125,000 pph package boilers, and auxiliary equipment. In the analysis, actual system data is used to assess the district heating system performance, energy and exergy efficiencies, exergetic improvement potential and exergy losses. Energy and exergy calculations are conducted for the whole year on an hourly basis. System efficiencies are calculated for a wide range of component operating loads. The results show how thermodynamic analysis can be used to identify the magnitudes and location of energy losses in order to improve the existing system, processes or components.

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

2011-01-01T23:59:59.000Z

326

District-heating system, La Grande, Oregon  

DOE Green Energy (OSTI)

The area suggested for district heating feasibility study encompassed slightly over 400 acres extending north and south from the geographic center of the city. This district was subdivided into 8 areas, which include the Grande Ronde Hospital, Eastern Oregon State College, La Grande school district, one institutional area, one commercial area and three residential areas. Basic space heating loads developed for the various areas after a survey by county personnel and computation using a computer program form the basis for this economic feasibility study.

Not Available

1982-01-01T23:59:59.000Z

327

RADIATION HEAT TRANSFER ENVIRONMENT IN FIRE AND FURNACE TESTS OF RADIOACTIVE MATERIALS PAKCAGES  

SciTech Connect

The Hypothetical Accident Conditions (HAC) sequential test of radioactive materials packages includes a thermal test to confirm the ability of the package to withstand a transportation fire event. The test specified by the regulations (10 CFR 71) consists of a 30 minute, all engulfing, hydrocarbon fuel fire, with an average flame temperature of at least 800 C. The requirements specify an average emissivity for the fire of at least 0.9, which implies an essentially black radiation environment. Alternate test which provide equivalent total heat input at the 800 C time averaged environmental temperature may also be employed. When alternate tests methods are employed, such as furnace or gaseous fuel fires, the equivalence of the radiation environment may require justification. The effects of furnace and open confinement fire environments are compared with the regulatory fire environment, including the effects of gases resulting from decomposition of package overpack materials. The results indicate that furnace tests can produce the required radiation heat transfer environment, i.e., equivalent to the postulated pool fire. An open enclosure, with transparent (low emissivity) fire does not produce an equivalent radiation environment.

Smith, A

2008-12-31T23:59:59.000Z

328

The Multi Optical Transition Radiation System  

SciTech Connect

The determination and monitoring of the transverse phase space in ATF2 is crucial in order to meet their performances specifications. Since the beam sizes at the Interaction Point (IP) depend strongly on the aberrations in the Final Focus System (FFS), accurate measurement upstream of the FFS is required to tune the beam sizes at the IP. The beam sizes as well as the emittance are measured in several locations in the beam diagnostic section of the Extraction Line (EXT line) of ATF2. The vertical beam sizes in the diagnostic section are of the order of 10 {mu}m this means that the devices have to image spot sizes as small as 5 {mu}m, with 10% accuracy a 2 {mu}m resolution device is necessary. The ATF2 EXT line is a beam line with low power and low repetition rate that make usable devices using solid targets. In contrast to a ring machine, where an individual bunch can be measured many times as it passes around the ring, the beam size and the emittance measurement in the LC or in the beam lines have to be performed in a single pass. This requires that the wire scan device types (laser or solid) sample across successive bunches within a train, often with an over-estimation of the beam size due to beam position and intensity jitter, and can take up to half a minute to complete the measurement. Although some of these effects could be corrected, as the jitter effect could be subtracted by using the nearby BPMs signals, this can be avoided by using Optical Transition Radiation (OTR) Monitors. These monitors are based on the transition radiation effect, a light cone emitted when the charged particle crosses a metallic interface. This light is emitted in a specular fashion so it can be focused on to a CCD and produces an image of the beam. OTRs are able to take many fast measurements and therefore to measure the emittance with high statistics, giving a low error and a good understanding of the emittance jitter. In this article, simulations of the expected beam sizes and emittance, along with a technical description of the system, its hardware and software implementation are described. Additionally first measurement of the beam size and emittance of the Multi Optical Transition Radiation System located in the Extraction Line of ATF2 are presented.

Faus-Golfe, A.; Alabau-Gonzalvo, J.; Blanch Gutierrez, C.; /Valencia U., IFIC; McCormick, D.; Cruz, J.; Woodley, M.; White, G.; /SLAC

2012-04-19T23:59:59.000Z

329

Radiation monitoring system for the environment and safety project  

E-Print Network (OSTI)

The project RAMSES (Radiation Monitoring System for the Environment and Safety) will provide LHC with a state of the art radiation monitoring and alarm system. RAMSES will survey the LHC accelerator, the LHC experimental areas and the environment of the LHC. The TIS (Technical Inspection and Safety) division will exploit this system to assess radiation risks and to control the releases of radioactivity. In addition, it will be integrated into the control rooms of the LHC accelerator and the LHC experiments. Obviously, RAMSES will already take into account CERN wide needs to renew the radiation monitoring system around the other CERN facilities. The requirements of the system are derived from CERN's own safety standards (CERN's Radiation Protection Manual, SAPOCO), from those of the CERN's two host states and from European standards. The mandate of the project team covers the system specification, prototyping, tendering, installation and integration of radiation monitors and industrial control equipment for sa...

Forkel-Wirth, Doris; Scibile, L; Segura, G; Vojtyla, P; CERN. Geneva. ST Division

2002-01-01T23:59:59.000Z

330

Heat pipe radiation cooling (HPRC) for high-speed aircraft propulsion. Phase 2 (feasibility) final report  

DOE Green Energy (OSTI)

The National Aeronautics and Space Administration (NASA), Los Alamos National Laboratory (Los Alamos), and CCS Associates are conducting the Heat Pipe Radiation Cooling (HPRC) for High-Speed Aircraft Propulsion program to determine the advantages and demonstrate the feasibility of using high-temperature heat pipes to cool hypersonic engine components. This innovative approach involves using heat pipes to transport heat away from the combustor, nozzle, or inlet regions, and to reject it to the environment by thermal radiation from adjacent external surfaces. HPRC is viewed as an alternative (or complementary) cooling technique to the use of pumped cryogenic or endothermic fuels to provide regenerative fuel or air cooling of the hot surfaces. The HPRC program has been conducted through two phases, an applications phase and a feasibility phase. The applications program (Phase 1) included concept and assessment analyses using hypersonic engine data obtained from US engine company contacts. The applications phase culminated with planning for experimental verification of the HPRC concept to be pursued in a feasibility program. The feasibility program (Phase 2), recently completed and summarized in this report, involved both analytical and experimental studies.

Martin, R.A.; Merrigan, M.A.; Elder, M.G.; Sena, J.T.; Keddy, E.S. [Los Alamos National Lab., NM (United States); Silverstein, C.C. [CCS Associates, Bethel Park, PA (United States)

1994-03-25T23:59:59.000Z

331

HEATING AND COOLING SYSTEM FOR CALUTRON  

DOE Patents (OSTI)

An apparatus is invented for heating or cooling the electrostatic liner conventionally disposed in a calutron tank. The apparatus is additionally arranged to mount the liner in its intended position in a readily detachable manner so as to facilitate disassembly of the calutron.

Starr, A.M.

1960-06-28T23:59:59.000Z

332

Residential Vertical Geothermal Heat Pump System Models: Calibration to Data:  

SciTech Connect

A detailed component-based simulation model of a geothermal heat pump system has been calibrated to monitored data taken from a family housing unit located at Fort Polk, Louisiana. The simulation model represents the housing unit, geothermal heat pump, ground heat exchanger, thermostat, blower, and ground-loop pump. Each of these component models was 'tuned' to better match the measured data from the site. These tuned models were then interconnect to form the system model. The system model was then exercised in order to demonatrate its capabilities.

Thornton, Jeff W. [Thermal Energy Systems Specialists, Inc.; McDowell, T. P. [Thermal Energy Systems Specialists, Inc.; Shonder, John A [ORNL; Hughes, Patrick [ORNL; Pahud, D. [University of Applied Sciences of Southern Switzerland; Hellstrom, G. [Lund University

1997-06-01T23:59:59.000Z

333

Cooperation of heat pump and solar system in the common power unit  

Science Conference Proceedings (OSTI)

The paper explains new possibilities of heat pumps usage in the common power units. The result of applied research is an examination of heat pump and active solar system cooperation eligibility. The aspects of such a cooperation are examined mainly from ... Keywords: combined heating system, heat pump, heating factor, heating factor increase, natural energy, solar system

Mastny Petr

2007-05-01T23:59:59.000Z

334

TRNSYS simulation of solar water heating system in Iraq  

Science Conference Proceedings (OSTI)

The objective of this work is to model and verify a direct solar water heating system in Baghdad, Iraq using TRNSYS software to meet the demand of hot water for 25 persons. This is achieved by using 10 m2 of a flat plate collector and 600 ... Keywords: Baghdad-Iraq, TRNSYS, solar, water heating

M. N. Mohammed; M. A. Alghoul; Kh. Abulqasem; Alshrif. Mustafa; Kh. Glaisa; P. Ooshaksaraei; M. Yahya; A. Zaharim; K. Sopian

2011-07-01T23:59:59.000Z

335

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.

Lopez-Monsalvo, C S

2010-01-01T23:59:59.000Z

336

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

337

STATE OF CALIFORNIA POOL AND SPA HEATING SYSTEMS  

E-Print Network (OSTI)

Address: Enforcement Agency: Permit Number: 2008 Residential Compliance Forms August 2009 Pool and Spa solar heating. 2. A cover for outdoor pools or spas that have a heat pump or gas heater. 3. Pool system shall be calculated based on pool sizing table below. 3. The pump is capable of operating at 2 or more

338

Description and operation of Haakon School geothermal-heating system  

SciTech Connect

To encourage the development of hydrothermal energy, twenty-three demonstration projects were funded. The Haakon School project is one of twelve such projects. The geothermal direct-use heating system at the Haakon School complex in Philip, South Dakota is described and information gained during approximately three heating seasons of operation is presented.

Childs, F.W.; Kirol, L.D.; Sanders, R.D.; McLatchy, M.J.

1983-10-01T23:59:59.000Z

339

Windjammer solar-water-heating system. Final technical report  

DOE Green Energy (OSTI)

The results of the Windjammer Solar-Water-Heating System tests showed that it was not as an efficient system as a comparable conventional system for converting solar energy into heat energy. However, it was determined that the innovative mode used less electric back-up energy for water heating. Reduced fossil fuel energy consumption being the ultimate objective of a solar water heating, the principle employed has been shown to be a workable energy saving concept. The differential mode of temperature control emerged as the more efficient mode of operation for the innovative system and under comparable conditions is projected to be nearly equivalent to the conventional solar system. Although the concept has proven workable, the costs feasible, and the potential for considereable improvements exists, additional research and development is needed to advance the design into its most practical application.

Windham, J.R.

1982-04-01T23:59:59.000Z

340

RESIDENTIAL ON SITE SOLAR HEATING SYSTEMS: A PROJECT EVALUATION USING THE CAPITAL ASSET PRICING MODEL  

E-Print Network (OSTI)

natural gas system requires the construction of pipeline networks; electrical heating systems require power generation

Schutz, Stephen Richard

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

Nuclear reactor heat transport system component low friction support system  

SciTech Connect

A support column for a heavy component of a liquid metal fast breeder reactor heat transport system which will deflect when the pipes leading coolant to and from the heavy component expand or contract due to temperature changes includes a vertically disposed pipe, the pipe being connected to the heavy component by two longitudinally spaced cycloidal dovetail joints wherein the distal end of each of the dovetails constitutes a part of the surface of a large diameter cylinder and the centerlines of these large diameter cylinders intersect at right angles and the pipe being supported through two longitudinally spaced cycloidal dovetail joints wherein the distal end of each of the dovetails constitutes a part of the surface of a large diameter cylinder and the centerlines of these large diameter cylinders intersect at right angles, each of the cylindrical surfaces bearing on a flat and horizontal surface.

Wade, Elman E. (Ruffs Dale, PA)

1980-01-01T23:59:59.000Z

342

The Sensitivity of Latent Heat Flux to Changes in the Radiative Forcing: A Framework for Comparing Models and Observations  

Science Conference Proceedings (OSTI)

A climate model must include an accurate surface physics scheme in order to examine the interactions between the land and atmosphere. Given an increase in the surface radiative forcing, the sensitivity of latent heat flux to available energy ...

Jonathan M. Winter; Elfatih A. B. Eltahir

2010-05-01T23:59:59.000Z

343

The Sensitivity of Latent Heat Flux to Changes in the Radiative Forcing: A Framework for Comparing Models and Observations  

E-Print Network (OSTI)

A climate model must include an accurate surface physics scheme in order to examine the interactions between the land and atmosphere. Given an increase in the surface radiative forcing, the sensitivity of latent heat flux ...

Winter, Jonathan (Jonathan Mark)

344

Low exhaust temperature electrically heated particulate matter filter system  

DOE Patents (OSTI)

A system includes a particulate matter (PM) filter, a sensor, a heating element, and a control module. The PM filter includes with an upstream end that receives exhaust gas, a downstream end and multiple zones. The sensor detects a temperature of the exhaust gas. The control module controls current to the heating element to convection heat one of the zones and initiate a regeneration process. The control module selectively increases current to the heating element relative to a reference regeneration current level when the temperature is less than a predetermined temperature.

Gonze, Eugene V. (Pinckney, MI); Paratore, Jr., Michael J. (Howell, MI); Bhatia, Garima (Bangalore, IN)

2012-02-14T23:59:59.000Z

345

Ash reduction system using electrically heated particulate matter filter  

DOE Patents (OSTI)

A control system for reducing ash comprises a temperature estimator module that estimates a temperature of an electrically heated particulate matter (PM) filter. A temperature and position estimator module estimates a position and temperature of an oxidation wave within the electrically heated PM filter. An ash reduction control module adjusts at least one of exhaust flow, fuel and oxygen levels in the electrically heated PM filter to adjust a position of the oxidation wave within the electrically heated PM filter based on the oxidation wave temperature and position.

Gonze, Eugene V [Pinckney, MI; Paratore, Jr., Michael J; He, Yongsheng [Sterling Heights, MI

2011-08-16T23:59:59.000Z

346

Monte Carlo simulation of radiation heat transfer in arrays of fixed discrete surfaces using cell-to-cell photon transport  

DOE Green Energy (OSTI)

Radiation heat transfer in an array of fixed discrete surfaces is an important problem that is particularly difficult to analyze because of the nonhomogeneous and anisotropic optical properties involved. This article presents an efficient Monte Carlo method for evaluating radiation heat transfer in arrays of fixed discrete surfaces. This Monte Carlo model has been optimized to take advantage of the regular arrangement of surfaces often encountered in these arrays. Monte Carlo model predictions have been compared with analytical and experimental results.

Drost, M.K. (Pacific Northwest Lab., Richland, WA (United States)); Welty, J.R. (Oregon State Univ., Corvallis, OR (United States))

1992-08-01T23:59:59.000Z

347

Influences of biomass heat and biochemical energy storages on the land surface fluxes and radiative temperature  

SciTech Connect

We conducted observations and modeling at a forest site to assess importance of biomass heat and biochemical energy storages for land-atmosphere interactions. We used the terrestrial ecosystem Fluxes And Pools Integrated Simulator (FAPIS). We first examined FAPIS performance by testing its predictions with and without biomass energy storages against measurements of surface energy and CO2 fluxes. We then evaluated the magnitudes and temporal patterns of the calculated biomass energy storages. Effects of energy storages on flux exchanges and variations of radiative temperature were investigated by contrasting FAPIS simulations with and without the storages. We found that with the storages, FAPIS predictions agreed with measurements well; without them, FAPIS performance deteriorated for all surface energy fluxes. The biomass heat storage and biochemical energy storage had clear diurnal patterns with typical ranges from -50 to 50 and -3 to 20 Wm-2, respectively; these typical ranges were exceeded substantially when there were sudden changes in atmospheric conditions. Without-storage simulations produced larger sensible and latent heat fluxes during the day but smaller fluxes (more negative values) at night as compared with with-storage simulations. Similarly, without-storage simulations had higher surface radiative temperature during the day but lower radiative temperature at night, indicating that the biomass energy storages act to dampen diurnal temperature range. Therefore, biomass heat and biochemical energy storages are an integral and substantial part of the surface energy budget and play a role in modulating land surface temperatures and must be considered in studies of land - atmosphere interactions and climate modeling.

Gu, Lianhong [ORNL; Meyers, T. P. [NOAA ATDD; Pallardy, Stephen G. [University of Missouri; Hanson, Paul J [ORNL; Yang, Bai [ORNL; Heuer, Mark [ATDD, NOAA; Hosman, K. P. [University of Missouri; Liu, Qing [ORNL; Riggs, Jeffery S [ORNL; Sluss, Daniel Wayne [ORNL; Wullschleger, Stan D [ORNL

2007-01-01T23:59:59.000Z

348

Reduce Natural Gas Use in Your Industrial Process Heating Systems  

Science Conference Proceedings (OSTI)

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

349

World Energy Projection System Plus Model Documentation: District Heat Model  

Reports and Publications (EIA)

This report documents the objectives, analytical approach and development of the World Energy Projection System Plus (WEPS+) District Heat Model. It also catalogues and describes critical assumptions, computational methodology, parameter estimation techniques, and model source code.

Brian Murphy

2011-09-29T23:59:59.000Z

350

In situ conversion process utilizing a closed loop heating system  

Science Conference Proceedings (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

351

Tidal heating and tidal evolution in the solar system  

E-Print Network (OSTI)

In this thesis, we examine the effects of tidal dissipation on solid bodies in application and in theory. First, we study the effects of tidal heating and tidal evolution in the Saturnian satellite system. We constrain the ...

Meyer, Jennifer Ann

2011-01-01T23:59:59.000Z

352

Heat Balance and Eddies in the Caribbean Upwelling System  

Science Conference Proceedings (OSTI)

The upper-ocean heat budget of the Caribbean upwelling system is investigated during the onset of the Atlantic warm pool (JuneSeptember) using high-resolution observations of sea surface temperature and a high-resolution () regional model. ...

Julien Jouanno; Julio Sheinbaum

2013-05-01T23:59:59.000Z

353

Horizontal Heat Exchanger Design and Analysis for Passive Heat Removal Systems  

Science Conference Proceedings (OSTI)

This report describes a three-year project to investigate the major factors of horizontal heat exchanger performance in passive containment heat removal from a light water reactor following a design basis accident LOCA (Loss of Coolant Accident). The heat exchanger studied in this work may be used in advanced and innovative reactors, in which passive heat removal systems are adopted to improve safety and reliability The application of horizontal tube-bundle condensers to passive containment heat removal is new. In order to show the feasibility of horizontal heat exchangers for passive containment cooling, the following aspects were investigated: 1. the condensation heat transfer characteristics when the incoming fluid contains noncondensable gases 2. the effectiveness of condensate draining in the horizontal orientation 3. the conditions that may lead to unstable condenser operation or highly degraded performance 4. multi-tube behavior with the associated secondary-side effects This project consisted of two experimental investigations and analytical model development for incorporation into industry safety codes such as TRAC and RELAP. A physical understanding of the flow and heat transfer phenomena was obtained and reflected in the analysis models. Two gradute students (one funded by the program) and seven undergraduate students obtained research experience as a part of this program.

Vierow, Karen

2005-08-29T23:59:59.000Z

354

Research on a Heat-supply Network Dispatching System Based on Geographical Information System (GIS)  

E-Print Network (OSTI)

In order to reduce heating systematic operation and maintenance expenses, aimed at the current standards of a heat-supply network based on GIS, combine with a national program of 'tenth-five-year-plan', the authors have developed a Heat-supply Network Dispatching System (HNDS). The system, based on Oracle database and Mapgis 6.5, compiles with Visual C++ software. With computer and communication techniques, the system dynamic inspects parameters and information of a heat-supply network, achieves real-time dispatching and automatic information management. Based on a relief map, the system combines data on inspection equipment with those of the heat-supply network, intuitively displays the state of inspected equipment and the heat-supply network. Using the models of forecast and analysis, the system is reasonably configured for each heat supply dispatch system. Results applied to demonstration projects prove that the system possesses characteristics of stability and security.

Zhou, Z.; Zou, P.; Tang, H.; Fang, X.; Wang, W.

2006-01-01T23:59:59.000Z

355

Valance heating/cooling system attains largest application in 1,000-room hotel  

SciTech Connect

Room temperatures in the 1,000 guest rooms of Chicago's Hyatt Regency Hotel are controlled by a valance heating and cooling system that functions by means of radiation and convection. The valances are mounted below the ceiling and consists of finned tubes and a drain tube contained within a wall-mounted enclosure. The finned tubes and drain are connected to a riser system, that is connected to a hot and cold water supply. The economics of the system is discussed and with no fans, motors, or blowers to run, energy is conserved. (MCW)

1976-08-01T23:59:59.000Z

356

Demand side management in district heating systems  

Science Conference Proceedings (OSTI)

This paper describes a multiagent system that has made the voyage from research project to commercialised product. The purpose for the multiagent system is to dynamically control a system so that the load of the system is below certain threshold values ... Keywords: agent-based deployed applications

Fredrik Wernstedt; Paul Davidsson; Christian Johansson

2007-05-01T23:59:59.000Z

357

Sensitivity of shortwave radiative flux density, forcing, and heating rates to the aerosol vertical profile  

SciTech Connect

The effect of the aerosol vertical distribution on the solar radiation profiles, for idealized and measured profiles of optical properties (extinction and single-scattering albedo (SSA)) during the May 2003 Atmospheric Radiation Measurement (ARM) Aerosol Intensive Observation Period (AIOP), has been investigated using the Rapid Radiative Transfer Model Shortwave (RRTM_SW) code. Calculated profiles of down-welling and up-welling solar fluxes during the AIOP have been compared with the data measured by up- and down-looking solar broadband radiometers aboard a profiling research aircraft. The measured profiles of aerosol extinction, SSA, and water vapor obtained from the same aircraft that carried the radiometers served as the inputs for the model calculations. It is noteworthy that for this study, the uplooking radiometers were mounted on a stabilized platform that kept the radiometers parallel with respect to the earths horizontal plane. The results indicate that the shape of the aerosol extinction profiles has very little impact on direct radiative forcings at the top of atmosphere and surface in a cloud-free sky. However, as long as the aerosol is not purely scattering, the shape of the extinction profiles is important for forcing profiles. Identical extinction profiles with different absorption profiles drastically influence the forcing and heating rate profiles. Using aircraft data from 19 AIOP profiles over the Southern Great Plains (SGP), we are able to achieve broadband down-welling solar flux closure within 0.8% (bias difference) or 1.8% (rms difference), well within the expected measurement uncertainty of 1 to 3%. The poorer agreement in up-welling flux (bias -3.7%, rms 10%) is attributed to the use of inaccurate surface albedo data. The sensitivity tests reveal the important role accurate, vertically resolved aerosol extinction data plays in tightening flux closure. This study also suggests that in the presence of a strongly absorbing substance, aircraft flux measurements from a stabilized platform have the potential to determine heating rate profiles. These measurement-based heating rate profiles provide useful data for heating rate closure studies and indirect estimates of single scattering albedo assumed in radiative transfer calculations.

Guan, Hong; Schmid, Beat; Bucholtz, Anthony; Bergstrom, Robert

2010-03-31T23:59:59.000Z

358

Open-Cycle Vapor Compression Heat Pump System  

E-Print Network (OSTI)

In many industrial processes, large quantities of energy are often wasted in the form of low pressure steam and low-grade heat. Economical recovery of these waste energy sources is often difficult due to such factors as low temperature levels and contamination of the steam. In industrial processes that utilize steam directly or as a mode of energy transport, waste energy can be efficiently recovered and upgraded in the form of high-pressure steam by means of an open-cycle steam heat pump system. Recovery and upgrading of these waste steam or heat sources offer a great potential for energy conservation. Thermo Electron has developed, under sponsorship by the Gas Research Institute, Southern California Gas Company, and the Consolidated Natural Gas Service Company, an open-cycle steam heat pump to recover this waste energy in the form of high-pressure process steam. The system utilizes excess low-pressure steam (or that produced from an excess heat source with a waste heat boiler) and compresses this steam 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 water. Utilizing the Thermo Electron system, fuel consumption can be 30 percent lower in comparison to a direct-fired boiler. Simple payback periods of 1 to 3 years are generally found for most applications.

Pasquinelli, D. M.; Becker, F. E.

1983-01-01T23:59:59.000Z

359

An Accurate Radiative Heating and Cooling Algorithm for Use in a Dynamical Model of the Middle Atmosphere  

Science Conference Proceedings (OSTI)

An infrared radiative heating and cooling algorithm designed to be used with dynamical models of the middle atmosphere is described. A Curtis matrix is used to compute cooling by the 15 and 10 ?m bands of carbon dioxide. Escape of radiation to ...

W. M. Wehrbein; C. B. Leovy

1982-07-01T23:59:59.000Z

360

RESIDENTIAL ON SITE SOLAR HEATING SYSTEMS: A PROJECT EVALUATION USING THE CAPITAL ASSET PRICING MODEL  

E-Print Network (OSTI)

representation of an On Site Solar Heating System. CML w c6782 Residential On"Site Solar Heating Systems: A p-r~jectof an On Site Solar Heating System. Representation of

Schutz, Stephen Richard

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

An Automatically Controlled Electrical Heating System for Use in an Explosive Environment  

SciTech Connect

An automatically controlled electrical heating system was developed to heat specific components of a compacting system for the production of explosive pellets. The electrical heating system was designed for application in a hazardous environment.

Page, D. O.; Draut, C. F.

1974-08-08T23:59:59.000Z

362

Aspects of forced convective heat transfer in geothermal systems  

DOE Green Energy (OSTI)

A knowledge of convective heat transfer is essential to understanding geothermal systems and other systems of moving groundwater. A simple, kinematic approach toward convective heat transfer is taken here. Concern is not with the cause of the groundwater motion but only with the fact that the water is moving and transferring heat. The mathematical basis of convective heat transfer is the energy equation which is a statement of the first law of thermodynamics. The general solution of this equation for a specific model of groundwater flow has to be done numerically. The numerical algorithm used here employs a finite difference approximation to the energy equation that uses central differences for the heat conduction terms and one-sided differences for the heat convection terms. Gauss--Seidel iteration is then used to solve the finite difference equation at each node of a non-uniform mesh. The Monroe and Red Hill hot springs, a small hydrothermal system in central Utah, provide an example to illustrate the application of convective heat transfer theory to a geophysical problem. Two important conclusions regarding small geothermal systems follow immediately from the results of this application. First, the most rapid temperature rise in the convecting part of a geothermal system is near the surface. Below this initially rapid temperature increase the temperature increases very slowly, and thus temperatures extrapolated from shallow boreholes can be seriously in error. Second, the temperatures and heat flows observed at Monroe and Red Hill, and probably at many other small geothermal areas, can easily result from moderate vertical groundwater velocities in faults and fracture zones in an area of normal heat flow.

Kilty, K.; Chapman, D.S.; Mase, C.

1978-07-01T23:59:59.000Z

363

Design of a tube bank waste heat reclaimer for residential heating systems  

SciTech Connect

Forced convection tube bank heat reclaimers are analyzed in detail for residential natural gas and oil-fired furnaces that are controlled by natural draft. Optimum reclaimer designs are obtained based on improved system efficiency, and considerations regarding manufacturing costs. Each reclaimer meets safety restrictions regarding allowable system pressure losses and minimum chimney gas temperatures. Reclaimer size and overall weight are also considered. Computer-generated solutions aid in determining heat recovery as a function of furnace fuel, furnace efficiency, ambient temperature, flue pipe size, and chimney height. The analysis considers a range of furnace efficiencies from 50 to 80%, and ambient temperatures from 0 to 60/sup 0/F, which are values considered typical for most domestic combustion heating equipment. Flue pipe sizes range from 4 to 6 inches in diameter and are 2 to 4 feet long. Chimney sizes range from 5 to 7 inches in equivalent diameter and include draft heights from 15 to 35 feet. The piping sizes correspond to furnace input capacities ranging from 50,000 to 170,000 Btu/h. For many domestic heating systems, the potential exists to recover the lost heat by as much as 30%, and to reduce fuel costs by as much as 15% by installing a flue pipe heat reclaimer.

Gretsinger, K.M.; Elias, T.I.

1987-01-01T23:59:59.000Z

364

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 +

365

Cost Estimates of Electricity from a TPV Residential Heating System  

Science Conference Proceedings (OSTI)

A thermophotovoltaic (TPV) system was built using a 12 to 20 kWth methane burner which should be integrated into a conventional residential heating system. The TPV system is cylindrical in shape and consists of a selective Yb2O3 emitter

Gnther Palfinger; Bernd Bitnar; Wilhelm Durisch; Jean?Claude Mayor; Detlev Grtzmacher; Jens Gobrecht

2003-01-01T23:59:59.000Z

366

Prototype solar heating and cooling systems. Monthly progress reports  

DOE Green Energy (OSTI)

This report is a collection of monthly status reports from the AiResearch Manufacturing Company, who is developing eight prototype solar heating and cooling systems under NASA Contract NAS8-32091. This effort calls for the development, manufacture, test, system installation, maintenance, problem resolution, and performance evaluation. The systems are 3-, 25-, and 75-ton size units.

Not Available

1978-10-01T23:59:59.000Z

367

Modelling of a vertical ground coupled heat pump system by using artificial neural networks  

Science Conference Proceedings (OSTI)

This paper describes the applicability of artificial neural networks (ANNs) to estimate of performance of a vertical ground coupled heat pump (VGCHP) system used for cooling and heating purposes experimentally. The system involved three heat exchangers ... Keywords: Cooling, Ground, Heat exchanger, Heat pump, Heating, Neural network

Hikmet Esen; Mustafa Inalli

2009-09-01T23:59:59.000Z

368

For Radiation Detection Systems Specific Methods  

Science Conference Proceedings (OSTI)

... The test procedures outlined within this TTOP will cover radiation detection instruments used for gamma-ray and neutron detection as well as ...

2013-01-10T23:59:59.000Z

369

Multi-Source Hydronic Heat Pump System Performance Test Bed  

E-Print Network (OSTI)

An extensive independent evaluation recently was completed of the Multi-Source Hydronic Heat Pump (MSHHP) system, a proprietary heating, ventilating and air conditioning (HVAC) system developed by Meckler Systems Group. The MSHHP tests were conducted on a unique test bed designed and constructed by National Technical Systems (NTS) through a research and development grant program funded by Southern California Edison Company. This paper outlines testing methods and results, including evaluations of peak power and energy savings allowed by the innovative system. The main difference between the MSHHP and a conventional HVAC system is use of a chilled water "diversity" cooling loop interconnecting air to water coils (located at each water source heat pump unit) with a central chilled water storage tank. The MSHHP system uses significantly less energy than a conventional HVAC system, and lowers peak demand by shifting required electrical energy consumption to lower-cost, off-peak and mid-peak rates. Lower heat pump capacities are a main feature of the MSHHP. This is accomplished by pre-cooling return air from the zone space, a process that also allows the heat pump to operate at a higher Coefficient of Performance (COP), thereby contributing to further energy savings.

Meckler, M.

1984-01-01T23:59:59.000Z

370

TEST RESULTS FOR A STIRLING-ENGINE-DRIVEN HEAT-ACTUATED HEAT PUMP BREADBOARD SYSTEM T.M. Moynihan  

E-Print Network (OSTI)

849044 TEST RESULTS FOR A STIRLING-ENGINE-DRIVEN HEAT-ACTUATED HEAT PUMP BREADBOARD SYSTEM T- of the diaphragms, and corresponding displace- resonant -refrigerant compressor through a ment of oil, is a heat-actuated heat pump '_ ~*,^ (HAHP) that was developed for residential appli- -, / Combustor cations

Oak Ridge National Laboratory

371

Heat Transfer and Alternative Energy Systems Group  

Science Conference Proceedings (OSTI)

... and validates computer models used to predict the energy performance of photovoltaics and other alternative energy production systems in ...

2011-10-31T23:59:59.000Z

372

HYBRID GROUND SOURCE HEAT PUMP SYSTEM SIMULATION USING VISUAL MODELING TOOL FOR HVACSIM+  

E-Print Network (OSTI)

incorporate both ground loop heat exchangers and supplemental heat rejecters, such as cooling towers, cooling-to-air heat pump (Yavuzturk 2000), heated pavement systems (Chiasson, et al. 2000a), shallow cooling ponds

373

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

374

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

375

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 discusses an alternate heat sink technology known as the Parallel Condensing System which is a combination of the cooling tower and the air cooled technologies. The Parallel Condensing System offers the advantages associated the conventional technologies but minimizes the disadvantages. As a result the Parallel Condensing System can offer greater value to the plant operator under certain circumstances.

Akhtar, S. Z.

2001-05-01T23:59:59.000Z

376

CHAPARRAL: A library for solving large enclosure radiation heat transfer problems  

SciTech Connect

Large, three-dimensional enclosure radiation beat transfer problems place a heavy demand on computing resources such as computational cycles, memory requirements, disk I/O, and disk space usage. This is primarily due to the computational and memory requirements associated with the view factor calculation and subsequent access of the view factor matrix during solution of the radiosity matrix equation. This is a fundamental problem that constrains Sandia`s current modeling capabilities. Reducing the computational and memory requirements for calculating and manipulating view factors would enable an analyst to increase the level of detail at which a body could be modeled and would have a major impact on many programs at Sandia such as weapon and transportation safety programs, component survivability programs, energy programs, and material processing programs. CHAPARRAL is a library package written to address these problems and is specifically tailored towards the efficient solution of extremely large three-dimensional enclosure radiation heat transfer problems.

Glass, M.W.

1995-08-01T23:59:59.000Z

377

Market opportunities for local renewable heating systems in the built environment.  

E-Print Network (OSTI)

??This research provides insight in the potential of local renewable heating systems. Local renewable heating systems are energy installations that make use of a renewable (more)

Van Meurs, W.M.

2011-01-01T23:59:59.000Z

378

Performance of active solar space-heating systems, 1980-1981 heating season  

DOE Green Energy (OSTI)

Data are provided on 32 solar heating sites in the National Solar Data Network (NSDN). Of these, comprehensive data are included for 14 sites which cover a range of system types and solar applications. A brief description of the remaining sites is included along with system problems experienced which prevented comprehensive seasonal analyses. Tables and discussions of individual site parameters such as collector areas, storage tank sizes, manufacturers, building dimensions, etc. are provided. Tables and summaries of 1980-1981 heating season data are also provided. Analysis results are presented in graphic form to highlight key summary information. Performance indices are graphed for two major groups of collectors - liquid and air. Comparative results of multiple NSDN systems' operation for the 1980-1981 heating season are summarized with discussions of specific cases and conclusions which may be drawn from the data. (LEW)

Welch, K.; Kendall, P.; Pakkala, P.; Cramer, M.

1981-01-01T23:59:59.000Z

379

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

380

Radiant Heating Basics | Department of Energy  

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

Radiant Heating Basics Radiant Heating Basics Radiant Heating Basics August 19, 2013 - 10:33am Addthis Radiant heating systems involve supplying heat directly to the floor or to panels in the walls or ceiling of a house. The systems depend largely on radiant heat transfer: the delivery of heat directly from the hot surface to the people and objects in the room via the radiation of heat, which is also called infrared radiation. Radiant heating is the effect you feel when you can feel the warmth of a hot stovetop element from across the room. When radiant heating is located in the floor, it is often called radiant floor heating or simply floor heating. Despite the name, radiant floor heating systems also depend heavily on convection, the natural circulation of heat within a room, caused by heat rising from the floor. Radiant floor

Note: This page contains sample records for the topic "radiator heating systems" 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

Radiant Heating Basics | Department of Energy  

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

Radiant Heating Basics Radiant Heating Basics Radiant Heating Basics August 19, 2013 - 10:33am Addthis Radiant heating systems involve supplying heat directly to the floor or to panels in the walls or ceiling of a house. The systems depend largely on radiant heat transfer: the delivery of heat directly from the hot surface to the people and objects in the room via the radiation of heat, which is also called infrared radiation. Radiant heating is the effect you feel when you can feel the warmth of a hot stovetop element from across the room. When radiant heating is located in the floor, it is often called radiant floor heating or simply floor heating. Despite the name, radiant floor heating systems also depend heavily on convection, the natural circulation of heat within a room, caused by heat rising from the floor. Radiant floor

382

System design package for solar heating and cooling system installed at Akron, Ohio  

DOE Green Energy (OSTI)

This package contains information used to evaluate the design of Solaron's solar heating, cooling, and domestic hot water system. A conventional heat pump provides summer cooling and back-up heating (when solar energy is not available). Included in the package are such items as the design data brochure, system performance specification, system hazard analysis, spare parts list, and detailed design drawings. A Solaron solar system is installed in a single-family dwelling at Akron, Ohio, and at Duffield, Virginia.

Not Available

1979-04-01T23:59:59.000Z

383

A Study of Heat Transfer in a Composite Wall Collector System with Porous Absorber  

E-Print Network (OSTI)

In this paper, heat transfer and flow in a composite solar wall with porous absorber has been studied. The unsteady numerical simulation is employed to analyze the performance of the flow and temperature field in the composite solar wall. The excess heat is stored in the porous absorber and wall by the incident solar radiation and there is a temperature gradient in the porous layer. Therefore, the porous absorber works as thermal insulator in a degree when no solar shining is available. The influence of the porosity within the porous absorber on the air flow in the porous absorber is significant. The results show that all these factors should be taken into account for a better design of a heating system.

Chen, W.

2006-01-01T23:59:59.000Z

384

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

Science Conference Proceedings (OSTI)

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

385

CONTROL SYSTEM FOR SOLAR HEATING and COOLING  

E-Print Network (OSTI)

Meeting, Los Angeles, California, July 28 - August 1, 1975),Lawrence Berkeley Laboratory University of CaliforniaBerkeley, California 94720 August 1975 A control system is

Dols, C.

2010-01-01T23:59:59.000Z

386

Simulation and analysis of district-heating and -cooling systems  

DOE Green Energy (OSTI)

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

387

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

388

VAPOR COMPRESSION HEAT PUMP SYSTEM FIELD TESTS AT THE TECH COMPLEX  

E-Print Network (OSTI)

, two conventional air- to-ir heat pumps, an air-to-air heat pump with desuperheater water heater 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

389

Optimizing the operation of an urban district heating system by means of variable speed drives  

Science Conference Proceedings (OSTI)

In this work is presenting an urban district heating system which is subjected to a modernization process. The urban district heating system is composed by the pumping station of the primary heat carrier and the district heating stations. The modernization ... Keywords: district heating system, energetic efficiency, pumping station, static frequency converter, testing

Sorin Ioan Deaconu; Gabriel Nicolae Popa; Iosif Popa

2008-07-01T23:59:59.000Z

390

Developing, testing, evaluating and optimizing solar heating and cooling systems  

DOE Green Energy (OSTI)

The objective is to develop and test various integrated solar heating, cooling and domestic hot water systems, and to evaluate their performance. Systems composed of new, as well as previously tested, components are carefully integrated so that effects of new components on system performance can be clearly delineated. The SEAL-DOE program includes six tasks which have received funding for the 1991--92 fifteen-month period. These include: (1) a project employing isothermal operation of air and liquid solar space heating systems; (2) a project to build and test several generic solar water heaters; (3) a project that will evaluate advanced solar domestic hot water components and concepts and integrate them into solar domestic hot water systems; (4) a liquid desiccant cooling system development project; (5) a project that will perform system modeling and analysis work on solid desiccant cooling systems research; and (6) a management task. The objectives and progress in each task are described in this report.

Not Available

1992-01-24T23:59:59.000Z

391

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

392

Passive space heating with a self-pumping vapor system  

DOE Green Energy (OSTI)

In this system, which should be useful for space or water heating, a refrigerant is evaporated in a solar collector and condensed within thermal storage located in the building below the collector. The vapor pressure generated in the collector periodically forces the condensed liquid upward to the location of the collector. This paper reports results of an operational test, in which this system provided passive space heating for an outdoor test cell during a winter season. The daily average energy yield and the elevation of collector temperature caused by self-pumping are reported, as well as observations on failure modes, system reliability, and suggestions for a practical configuration.

Hedstrom, J.C.; Neeper, D.A.

1986-01-01T23:59:59.000Z

393

Natural convection heat exchangers for solar water heating systems. Technical progress report, October 1, 1995--November 30, 1995  

DOE Green Energy (OSTI)

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

394

Natural convection heat exchangers for solar water heating systems. Technical progress report, April 1, 1995--May 31, 1995  

DOE Green Energy (OSTI)

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

395

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

DOE Green Energy (OSTI)

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

396

Geothermal district heating system feasibility analysis, Thermopolis, Wyoming  

DOE Green Energy (OSTI)

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

397

GUIDELINES FOR CERTIFICATION OF COMBINED HEAT AND POWER SYSTEMS  

E-Print Network (OSTI)

Description 1 CHP System Name 2 CEC Plant ID 3 EIA Plant ID 4 Qualifying Facility ID (if applicable) 5 Thermal, and emissions related to combined heat and power (CHP) system power plant operations. This information is used the power plant is first reported on Form CEC-2843. The respondent should use the Commission assigned code

398

Electrically heated particulate filter diagnostic systems and methods  

DOE Patents (OSTI)

A system that diagnoses regeneration of an electrically heated particulate filter is provided. The system generally includes a grid module that diagnoses a fault of the grid based on at least one of a current signal and a voltage signal. A diagnostic module at least one of sets a fault status and generates a warning signal based on the fault of the grid.

Gonze, Eugene V [Pinckney, MI

2009-09-29T23:59:59.000Z

399

INTERACTION OF A SOLAR SPACE HEATING SYSTEM WITH THE THERMAL BEHAVIOR OF A BUILDING  

E-Print Network (OSTI)

to a typical h"ydronic solar heating system for differentlarger by the active solar heating system. its, Schiller,Klein, and J, A. Duffie, "Solar Heating Design", (New York:

Vilmer, Christian

2013-01-01T23:59:59.000Z

400

INTERACTION OF A SOLAR SPACE HEATING SYSTEM WITH THE THERMAL BEHAVIOR OF A BUILDING  

E-Print Network (OSTI)

determine the building response to the solar heating system.on building comfort of an active solar heating system wherethe building response to a typical h"ydronic solar heating

Vilmer, Christian

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "radiator heating systems" 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

Modeling and Simulation of the ITER First Wall/Blanket Primary Heat Transfer System  

SciTech Connect

ITER inductive power operation is modeled and simulated using a thermal-hydraulics system code (RELAP5) integrated with a 3-D CFD (SC-Tetra) code. The Primary Heat Transfer System (PHTS) functions are predicted together with the main parameters operational ranges. The control algorithm strategy and derivation are summarized as well. The First Wall and Blanket modules are the primary components of PHTS, used to remove the major part of the thermal heat from the plasma. The modules represent a set of flow channels in solid metal structure that serve to absorb the radiation heat and nuclear heating from the fusion reactions and to provide shield for the vacuum vessel. The blanket modules are water cooled. The cooling is forced convective with constant blanket inlet temperature and mass flow rate. Three independent water loops supply coolant to the three blanket sectors. The main equipment of each loop consists of a pump, a steam pressurizer and a heat exchanger. A major feature of ITER is the pulsed operation. The plasma does not burn continuously, but on intervals with large periods of no power between them. This specific feature causes design challenges to accommodate the thermal expansion of the coolant during the pulse period and requires active temperature control to maintain a constant blanket inlet temperature.

Ying, Alice [University of California, Los Angeles; Popov, Emilian L [ORNL

2011-01-01T23:59:59.000Z

402

Thulium heat source for high-endurance and high-energy density power systems  

DOE Green Energy (OSTI)

We are studying the performance characteristics of radioisotope heat source designs for high-endurance and high-energy-density power systems that use thulium-170. Heat sources in the power range of 5--50 kW{sub th} coupled with a power conversion efficiency of {approximately}30%, can easily satisfy current missions for autonomous underwater vehicles. New naval missions will be possible because thulium isotope power systems have a factor of one-to-two hundred higher endurance and energy density than chemical and electrochemical systems. Thulium-170 also has several other attractive features, including the fact that it decays to stable ytterbium-170 with a half-life of four months. For terrestrial applications, refueling on that time scale should be acceptable in view of the advantage of its benign decay. The heat source designs we are studying account for the requirements of isotope production, shielding, and integration with power conversion components. These requirements are driven by environmental and safety considerations. Thulium is present in the form of thin refractory thulia disks that allow power conversion at high peak temperature. We give estimates of power system state points, performance, mass, and volume characteristics. Monte Carlo radiation analysis provides a detailed assessment of shield requirements and heat transfer under normal and distressed conditions is also considered. 11 refs., 7 figs., 4 tabs.

Walter, C.E.; Kammeraad, J.E.; Van Konynenburg, R.; VanSant, J.H.

1991-05-01T23:59:59.000Z

403

Lamp system for uniform semiconductor wafer heating  

SciTech Connect

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

404

A performance data network for solar process heat systems  

DOE Green Energy (OSTI)

A solar process heat (SPH) data network has been developed to access remote-site performance data from operational solar heat systems. Each SPH system in the data network is outfitted with monitoring equipment and a datalogger. The datalogger is accessed via modem from the data network computer at the National Renewable Energy Laboratory (NREL). The dataloggers collect both ten-minute and hourly data and download it to the data network every 24-hours for archiving, processing, and plotting. The system data collected includes energy delivered (fluid temperatures and flow rates) and site meteorological conditions, such as solar insolation and ambient temperature. The SPH performance data network was created for collecting performance data from SPH systems that are serving in industrial applications or from systems using technologies that show promise for industrial applications. The network will be used to identify areas of SPH technology needing further development, to correlate computer models with actual performance, and to improve the credibility of SPH technology. The SPH data network also provides a centralized bank of user-friendly performance data that will give prospective SPH users an indication of how actual systems perform. There are currently three systems being monitored and archived under the SPH data network: two are parabolic trough systems and the third is a flat-plate system. The two trough systems both heat water for prisons; the hot water is used for personal hygiene, kitchen operations, and laundry. The flat plate system heats water for meat processing at a slaughter house. We plan to connect another parabolic trough system to the network during the first months of 1996. We continue to look for good examples of systems using other types of collector technologies and systems serving new applications (such as absorption chilling) to include in the SPH performance data network.

Barker, G.; Hale, M.J.

1996-03-01T23:59:59.000Z

405

Enhancing VHTR Passive Safety and Economy with Thermal Radiation Based Direct Reactor Auxiliary Cooling System  

Science Conference Proceedings (OSTI)

One of the most important requirements for Gen. IV Very High Temperature Reactor (VHTR) is passive safety. Currently all the gas cooled version of VHTR designs use Reactor Vessel Auxiliary Cooling System (RVACS) for passive decay heat removal. The decay heat first is transferred to the core barrel by conduction and radiation, and then to the reactor vessel by thermal radiation and convection; finally the decay heat is transferred to natural circulated air or water systems. RVACS can be characterized as a surface based decay heat removal system. The RVACS is especially suitable for smaller power reactors since small systems have relatively larger surface area to volume ratio. However, RVACS limits the maximum achievable power level for modular VHTRs due to the mismatch between the reactor power (proportional to volume) and decay heat removal capability (proportional to surface area). When the relative decay heat removal capability decreases, the peak fuel temperature increases, even close to the design limit. Annular core designs with inner graphite reflector can mitigate this effect; therefore can further increase the reactor power. Another way to increase the reactor power is to increase power density. However, the reactor power is also limited by the decay heat removal capability. Besides the safety considerations, VHTRs also need to be economical in order to compete with other reactor concepts and other types of energy sources. The limit of decay heat removal capability set by using RVACS has affected the economy of VHTRs. A potential alternative solution is to use a volume-based passive decay heat removal system, called Direct Reactor Auxiliary Cooling Systems (DRACS), to remove or mitigate the limitation on decay heat removal capability. DRACS composes of natural circulation loops with two sets of heat exchangers, one on the reactor side and another on the environment side. For the reactor side, cooling pipes will be inserted into holes made in the outer or inner graphite reflector blocks. There will be gaps between these cooling pipes and their corresponding surrounding graphite surfaces. Graphite has an excellent heat conduction property. By taking advantage of this feature, we can have a volume-based method to remove decay heat. The scalability can be achieved, if needed, by employing more rows of cooling pipes to accommodate higher decay heat rates. Since heat can easily conduct through the graphite regions between the holes made for the cooling pipes, those cooling pipes located further away from the active core region can still be very effective in removing decay heat. By removing the limit on the decay heat removal capability due to the limited available surface area as in a RVACS, the reactor power and power density can be significantly increased, without losing the passive heat removal feature. This paper will introduce the concept of using DRACS to enhance VHTR passive safety and economics. Three design options will be discussed, depending on the cooling pipe locations. Analysis results from a lumped volume based model and CFD simulations will be presented.

Haihua Zhao; Hongbin Zhang; Ling Zou; Xiaodong Sun

2012-06-01T23:59:59.000Z

406

Energy consumption and CO2emissions of Beijing heating system: based on a system dynamics model  

Science Conference Proceedings (OSTI)

Beijing is a typical North China city, and it uses about 15-18% of its total energy consumption for heating. The building construction industry is also a key source of CO2 emissions. This article, based on a system dynamics model, aims to simulate and ... Keywords: CO2 emissions, energy consumption, heating system, system dynamics

Hefeng Tong; Weishuang Qu

2011-11-01T23:59:59.000Z

407

Study on the Mode of Power Plant Circulating Water Waste Heat Regenerative Thermal System  

Science Conference Proceedings (OSTI)

Power Plant Circulating Water (PPCW) waste heat recycling is an important way of increasing a power plants primary energy ratio. According to the PPCW waste heat regenerative thermal system, the authors propose two modes of heat pump heat regenerative ... Keywords: heat pump, power plant circulating water (PPCW), waste heat recycling, energy saving

Bi Qingsheng; Ma Yanliang; Yang Zhifu

2009-10-01T23:59:59.000Z

408

Heat pipes for enhanced cooldown of cyrogenic systems  

SciTech Connect

In many important cryogenic applications the use of liquid cryogens for system cooling are either not feasible or are unsuitable. In such cases a cryogenic refrigeration system or multi stage cryocooler must be employed to provide the necessary cooling. To shorten cooldown time for such a system, especially if the thermal mass is large, a thermal shunt directly connecting the first stage of the cryocooler to the load during cooldown is desirable. This thermal shunt allows effective utilization of the greater cooling power available from the first stage of the cryocooler early in the cooldown. Upon reaching operating temperature, the thermal shunt must exhibit a high resistance to thermally isolate the first stage of the cryocooler from the load. Heat pipes are well suited to achieve these objectives. The Advanced Lightweight Influence Sweep System (ALISS), under development by the U.S. Navy for shallow water magnetic mine countermeasures, employs a large, conductively cooled, superconducting magnet that must be cooled from 300 to 4.2 K. Cryogenic heat pipes acting as cryocooler thermal shunts are used to shorten the cooldown time. Ethane, nitrogen and oxygen were evaluated as possible working fluids. A thermal model of the ALISS was developed to evaluate the cooldown performance of various heat pipe combinations. In conjunction with heat pipe performance tests, this model was used to select a suitable design for the heat pipe thermal shunts.

Prenger, F.C.; Hill, D.D.; Daney, D.E.; Daugherty, M.A.; Green, G.F.; Chafe, J.; Heiberger, M.; Langhorn, A.

1996-08-01T23:59:59.000Z

409

Solar heating system installed at Stamford, CT. Final report  

DOE Green Energy (OSTI)

Information is provided on the solar heating system installed at the Lutz-Sotire Partnership Executive East Office Building, Stamford, Connecticut. The information consists of description of system and components, operation and maintenance manual, as-built drawings and manufacturer's component data. The solar system was designed to provide approximately 50 percent of the heating requirements. The solar facility has 2,561 sq. ft. of liquid flat plate collectors and a 6000 gallon, stone lined, well-insulated storage tank. Freeze protection is provided by a 50 percent glycol/water mixture in the collector loop. From the storage tank, solar heated water is fed into the building's distributed heat pump loop via a modulating three-way valve. If the storage tank temperature drops below 80/sup 0/F, the building loop may be supplied from the existing electrical hot water boilers. The Executive East Office Building is of moderate size, 25,000 sq. ft. of heated space in 2 1/2 stories. The solar system makes available for other users up to 150 KVA of existing electrical generating capacity.

Not Available

1979-09-01T23:59:59.000Z

410

Countercurrent direct contact heat exchange process and system  

DOE Patents (OSTI)

Recovery of energy from geothermal brines and other hot water sources by direct contact heat exchange with a working fluid, such as a hydrocarbon working fluid, e.g. isobutane. The process and system consists of a plurality of stages, each stage including mixing and settling units. In the first stage, hot brine and arm working fluid are intimately mixed and passed into a settler wherein the brine settles to the bottom of the settler and the hot working fluid rises to the top. The hot working fluid is passed to a heat engine or turbine to produce work and the working fluid is then recycled back into the system. The system is comprised of a series of stages each containing a settler and mixer, and wherein the working fluid and the brine flow in a countercurrent manner through the stages to recover the heat from the brine in increments and raise the temperature of the working fluid in increments.

Wahl, III, Edward F. (Claremont, CA); Boucher, Frederic B. (San Juan Capistrano, CA)

1979-01-01T23:59:59.000Z

411

Energy Efficient Steam Trapping of Trace Heating Systems  

E-Print Network (OSTI)

Since as many as 40-60% of a plant's steam traps may be used on steam tracer lines, it is essential to select the correct, properly sized 'traps'; to optimize the efficient removal of condensate while providing maximum heat transfer to maintain desired product temperatures and greatly reduce steam losses. Factors related to achieving uniform product temperatures and maximum heat transfer rates and energy efficiency are: 1.Types and Methods used for Steam Tracing; 2. Systematic heat balance required to achieve economic tracer lengths; 3. Maximum allowable trapping distance for specific applications 4.Data important to determine condensate loads; 5. Trap selection, sizing, good installation practices, and proper maintenance. Using an engineered approach to steam trapping of trace heating systems have resulted in stable tracer line temperatures while reducing steam consumption 10-50% with minimum maintenance.

Krueger, R. G.; Wilt, G. W.

1981-01-01T23:59:59.000Z

412

The Radiation Monitoring System for the LHCb Inner Tracker  

E-Print Network (OSTI)

The performance of the LHCb Radiation Monitoring System (RMS) designed to monitor radiation load on the Inner Trackersilicon micro-strip detectors is presented. The RMS comprises Metal Foil Detectors read-out by sensitive Charge Integrators. MFD is a radiation hard detector operating at high charged particle ?uxes. RMS is used to monitor radiation load as well as relative luminosity of the LHCb experiment. The results obtained by the RMS during LHC operation in 20102011 are compared to the Monte-Carlo simulation.

Okhrimenko, O; Pugatch, V; Alessio, F; Corti, G

2011-01-01T23:59:59.000Z

413

Solar heating and hot water system installed at Listerhill, Alabama  

DOE Green Energy (OSTI)

The solar system was installed into a new buildng and was designed to provide 79% of the estimated annual space heating load and 59% of the estimated annual potable hot water requirement. The collectors are flat plate, liquid manufactured by Reynolds Metals Company and cover a total area of 2344 square feet. The storage medium is water inhibited with NALCO 2755 and the container is an underground, unpressurized steel tank with a capacity of 5000 gallons. This final report describes in considerable detail the solar heating facility and contains detailed drawings of the completed system.

Not Available

1978-12-01T23:59:59.000Z

414

Internal dust recirculation system for a fluidized bed heat exchanger  

DOE Patents (OSTI)

A fluidized bed heat exchanger in which air is passed through a bed of particulate material containing fuel disposed in a housing. A steam/water natural circulation system is provided in a heat exchange relation to the bed and includes a steam drum disposed adjacent the bed and a tube bank extending between the steam drum and a water drum. The tube bank is located in the path of the effluent gases exiting from the bed and a baffle system is provided to separate the solid particulate matter from the effluent gases. The particulate matter is collected and injected back into the fluidized bed.

Gamble, Robert L. (Wayne, NJ); Garcia-Mallol, Juan A. (Morristown, NJ)

1981-01-01T23:59:59.000Z

415

Hybrid space heating/cooling system with Trombe wall, underground venting, and assisted heat pump  

DOE Green Energy (OSTI)

Our goal was to design and monitor a hybrid solar system/ground loop which automatically assists the standard, thermostatically controlled home heating/cooling system. The input from the homeowner was limited to normal thermostat operations. During the course of the project it was determined that to effectively gather data and control the various component interactions, a micro-computer based control system would also allow the HVAC system to be optimized by simple changes to software. This flexibility in an untested concept helped us to achieve optimum system performance. Control ranged from direct solar heating and direct ground loop cooling modes, to assistance of the heat pump by both solar space and ground loop. Sensors were strategically placed to provide data on response of the Trombe wall (surface, 4 in. deep, 8 in. deep), and the ground loop (inlet, 3/4 length, outlet). Micro-computer hardware and computer programs were developed to make cost effective decisions between the various modes of operation. Although recent advances in micro-computer hardware make similar control systems more readily achievable utilizing standard components, attention to the decision making criteria will always be required.

Shirley, J.W.; James, L.C.; Stevens, S.; Autry, A.N.; Nussbaum, M.; MacQueen, S.V.

1983-06-22T23:59:59.000Z

416

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

417

An Overview of Liquid Fluoride Salt Heat Transport Systems  

SciTech Connect

Heat transport is central to all thermal-based forms of electricity generation. The ever increasing demand for higher thermal efficiency necessitates power generation cycles transitioning to progressively higher temperatures. Similarly, the desire to provide direct thermal coupling between heat sources and higher temperature chemical processes provides the underlying incentive to move toward higher temperature heat transfer loops. As the system temperature rises, the available materials and technology choices become progressively more limited. Superficially, fluoride salts at {approx}700 C resemble water at room temperature being optically transparent and having similar heat capacity, roughly three times the viscosity, and about twice the density. Fluoride salts are a leading candidate heat-transport material at high temperatures. Fluoride salts have been extensively used in specialized industrial processes for decades, yet they have not entered widespread deployment for general heat transport purposes. This report does not provide an exhaustive screening of potential heat transfer media and other high temperature liquids such as alkali metal carbonate eutectics or chloride salts may have economic or technological advantages. A particular advantage of fluoride salts is that the technology for their use is relatively mature as they were extensively studied during the 1940s-1970s as part of the U.S. Atomic Energy Commission's program to develop molten salt reactors (MSRs). However, the instrumentation, components, and practices for use of fluoride salts are not yet developed sufficiently for commercial implementation. This report provides an overview of the current understanding of the technologies involved in liquid salt heat transport (LSHT) along with providing references to the more detailed primary information resources. Much of the information presented here derives from the earlier MSR program. However, technology has evolved over the intervening years, and this report also describes more recently developed technologies such as dry gas seals. This report also provides a high-level, parametric evaluation of LSHT loop performance to allow general intercomparisons between heat-transport fluid options as well as provide an overview of the properties and requirements for a representative loop. A compilation of relevant thermophysical properties of useful fluoride salts is also included for salt heat transport systems. Fluoride salts can be highly corrosive depending on the container materials selected, the salt chemistry, and the operating procedures used. The report includes an overview of the state-of-the-art in reduction-oxidation chemistry control methodologies employed to minimize corrosion issues. Salt chemistry control technology, however, remains at too low a level of understanding for widespread industrial usage. Loop operational issues such as start-up procedures and system freeze-up vulnerability are also discussed. Liquid fluoride salts are a leading candidate heat transport medium for high-temperature applications. This report provides an overview of the current status of liquid salt heat transport technology. The report includes a high-level, parametric evaluation of liquid fluoride salt heat transport loop performance to allow intercomparisons between heat-transport fluid options as well as providing an overview of the properties and requirements for a representative loop. Much of the information presented here derives from the earlier molten salt reactor program and a significant advantage of fluoride salts, as high temperature heat transport media is their consequent relative technological maturity. The report also includes a compilation of relevant thermophysical properties of useful heat transport fluoride salts. Fluoride salts are both thermally stable and with proper chemistry control can be relatively chemically inert. Fluoride salts can, however, be highly corrosive depending on the container materials selected, the salt chemistry, and the operating procedures used. The report also provides an over

Holcomb, David Eugene [ORNL; Cetiner, Mustafa Sacit [ORNL

2010-09-01T23:59:59.000Z

418

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

419

Design and Experiments of a Solar Low-temperature Hot Water Floor Radiant Heating System  

E-Print Network (OSTI)

The solar low-temperature hot water floor radiant heating system combines solar energy heating with floor radiant heating. This kind of environmental heating way not only saves fossil resources and reduces pollution, but also makes people feel more comfortable. First, the authors devised an experimental scheme and set up the laboratory. Second, we collected a great deal of data on the system in different situations. Finally, we conclude that such heating system is feasible and one of the best heating methods.

Wu, Z.; Li, D.

2006-01-01T23:59:59.000Z

420

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

E-Print Network (OSTI)

exchanger, comfort. #12;AN OPTIMIZED TWO-CAPACITY ADVANCED ELECTRIC HEAT PUMP S. E. Veyo* ABSTRACT A two constrained optimization procedure was used to select heat exchanger proportions, air flow rates National Laboratory. * S. E. Veyo, Mgr., Heat Exchange Systems, Westinghouse R&D Center, Pittsburgh, PA

Oak Ridge National Laboratory

Note: This page contains sample records for the topic "radiator heating systems" 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

White Pine Co. Public School System Biomass Conversion Heating Project  

DOE Green Energy (OSTI)

The White Pine County School District and the Nevada Division of Forestry agreed to develop a pilot project for Nevada using wood chips to heat the David E. Norman Elementary School in Ely, Nevada. Consideration of the project was triggered by a ''Fuels for Schools'' grant that was brought to the attention of the School District. The biomass project that was part of a district-wide energy retrofit, called for the installation of a biomass heating system for the school, while the current fuel oil system remained as back-up. Woody biomass from forest fuel reduction programs will be the main source of fuel. The heating system as planned and completed consists of a biomass steam boiler, storage facility, and an area for unloading and handling equipment necessary to deliver and load fuel. This was the first project of it's kind in Nevada. The purpose of the DOE funded project was to accomplish the following goals: (1) Fuel Efficiency: Purchase and install a fuel efficient biomass heating system. (2) Demonstration Project: Demonstrate the project and gather data to assist with further research and development of biomass technology; and (3) Education: Educate the White Pine community and others about biomass and other non-fossil fuels.

Paul Johnson

2005-11-01T23:59:59.000Z

422

2005 ASHRAE. 109 Groundwater heat pump systems using standing column  

E-Print Network (OSTI)

©2005 ASHRAE. 109 ABSTRACT Groundwater heat pump systems using standing column wells Carl D. Orio Carl N. Johnson, PhD, PE Simon J. Rees, PhD Member ASHRAE Member ASHRAE Member ASHRAE A. Chiasson, PhD, PE Zheng Deng, PhD Jeffrey D. Spitler, PhD, PE Member ASHRAE Student Member ASHRAE Fellow

423

Solar heating/cooling and domestic hot-water systems  

Science Conference Proceedings (OSTI)

Increasing awareness of global warming forces policy makers and industries to face two challenges: reducing greenhouse gas emissions and securing stable energy supply against ever-increasing world energy consumption, which is projected to increase by ... Keywords: buildings heating, domestic hot-water, energetical analysis, renewable energy sources, solar cooling technologies, solar energy collection, solar thermal systems

Ioan Srbu; Marius Adam

2011-02-01T23:59:59.000Z

424

EVALUATION OF HEAT REJECTION SYSTEMS FOR PL-3  

SciTech Connect

An investigation was made of heat rejection systems for use in the PL-3 nuclear power plant, designed for placement at Byrd Station, Antarctica. It was concluded that the glycol-coupled surface condenser and air blast cooler combination appears to be suited for PL-3 plant requirements and operating conditions. (auth)

Thurnau, C.J.

1962-03-01T23:59:59.000Z

425

White Pine Co. Public School System Biomass Conversion Heating Project  

SciTech Connect

The White Pine County School District and the Nevada Division of Forestry agreed to develop a pilot project for Nevada using wood chips to heat the David E. Norman Elementary School in Ely, Nevada. Consideration of the project was triggered by a ''Fuels for Schools'' grant that was brought to the attention of the School District. The biomass project that was part of a district-wide energy retrofit, called for the installation of a biomass heating system for the school, while the current fuel oil system remained as back-up. Woody biomass from forest fuel reduction programs will be the main source of fuel. The heating system as planned and completed consists of a biomass steam boiler, storage facility, and an area for unloading and handling equipment necessary to deliver and load fuel. This was the first project of it's kind in Nevada. The purpose of the DOE funded project was to accomplish the following goals: (1) Fuel Efficiency: Purchase and install a fuel efficient biomass heating system. (2) Demonstration Project: Demonstrate the project and gather data to assist with further research and development of biomass technology; and (3) Education: Educate the White Pine community and others about biomass and other non-fossil fuels.

Paul Johnson

2005-11-01T23:59:59.000Z

426

OPTIMIZED CONTROL STRATEGIES FOR A TYPICAL WATER LOOP HEAT PUMP SYSTEM.  

E-Print Network (OSTI)

??Water Loop Heat Pump (WLHP) System has been widely utilized in the Heating, Ventilating and Air Conditioning (HVAC) industry for several decades. There is no (more)

Lian, Xu

2011-01-01T23:59:59.000Z

427

The Use of Aluminum Process Reject Heat as the Source of Energy for a District Heating System  

E-Print Network (OSTI)

Rocket Research Company (RRC) is investigating the use of industrial process reject heat as a source of energy for large scale district heating. The District heating System is a network of closed-loop hot water pipes that recover energy from the fume hood ducts at the Intalco aluminum reduction plant and transmits the energy to commercial, residential, and institutional users in Bellingham, Washington for space and hot water heating.

McCabe, J.; Olszewski, M.

1980-01-01T23:59:59.000Z

428

Solar passive ceiling system. Final report. [Passive solar heating system with venetian blind reflectors and latent heat storage in ceiling  

DOE Green Energy (OSTI)

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

429

Radiative Heating Profiles in Simple Cirrus Cloud Systems  

Science Conference Proceedings (OSTI)

Results from one-dimensional cirrus cloud model simulations in the absence of upward velocities are used to show that the growth/sublimation of the ice particles in the cloud, and the fact that they are falling, can be important factors in ...

Andrew Detwiler; V. Ramaswamy

1990-09-01T23:59:59.000Z

430

Prototype solar heating and cooling systems. Monthly progress reports  

DOE Green Energy (OSTI)

This report is a combination of monthly progress reports submitted by AiResearch Manufacturing Company. It contains a summary of activities and progress made from November 1, 1978, to February 28, 1979. AiResearch Manufacturing Company is developing prototype solar heating/cooling systems under NASA Contract NAS8-32091. This effort calls for the development, manufacture, test, system installation, maintenance, problem resolution, and performance evaluation.

Not Available

1979-04-01T23:59:59.000Z

431

Negative heat capacity at phase-separation in macroscopic systems  

E-Print Network (OSTI)

Systems with long-range as well with short-range interactions should necessarily have a convex entropy S(E) at proper phase transitions of first order, i.e. when a separation of phases occurs. Here the microcanonical heat capacity c(E)= -\\frac{(\\partial S/\\partial E)^2}{\\partial^2S/\\partial E^2} is negative. This should be observable even in macroscopic systems when energy fluctuations with the surrounding world can be sufficiently suppressed.

D. H. E. Gross

2005-08-19T23:59:59.000Z

432

Solar heating system for recreation building at Scattergood School  

DOE Green Energy (OSTI)

This project was initiated in May 1976 and was completed in June 1977. A six-month acceptance-testing period followed during which time a number of minor modifications and corrections were made to improve system performance and versatility. This Final Report describes in considerable detail the solar heating facility and the project involved in its construction. As such, it has both detailed drawings of the completed system and a section that discusses the bottlenecks that were encountered along the way.

Heins, C.F.

1978-01-03T23:59:59.000Z

433

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 outdoor temperatures are obtained, and the heating load of the manufactured space is analyzed. The relationship between the envelope internal surface temperature and the workspace temperature is also analyzed in this paper. CFD simulation software is used to simulate the temperature field and the envelope's internal surface temperature of the manufacture space with hot-air heating system. Comparison and analysis of heating loads are done between the manufactured spaces with convection heating and radiant heating systems.

Zheng, X.; Dong, Z.

2006-01-01T23:59:59.000Z

434

Performance control strategies for oil-fired residential heating systems  

SciTech Connect

Results are reported of a study of control system options which can be used to improve the combustion performance of residential, oil-fired heating equipment. Two basic control modes were considered in this program. The first is service required'' signals in which an indication is provided when the flame quality or heat exchanger cleanliness have degraded to the point that a service call is required. The second control mode is excess-air trim'' in which the burner would essentially tune itself continuously for maximum efficiency. 35 refs., 67 figs., 2 tabs.

Butcher, T.

1990-07-01T23:59:59.000Z

435

Oxy-fuel combustion of coal and biomass, the effect on radiative and convective heat transfer and burnout  

Science Conference Proceedings (OSTI)

This paper focuses on results of co-firing coal and biomass under oxy-fuel combustion conditions on the RWEn 0.5 MWt Combustion Test Facility (CTF). Results are presented of radiative and convective heat transfer and burnout measurements. Two coals were fired: a South African coal and a Russian Coal under air and oxy-fuel firing conditions. The two coals were also co-fired with Shea Meal at a co-firing mass fraction of 20%. Shea Meal was also co-fired at a mass fraction of 40% and sawdust at 20% with the Russian Coal. An IFRF Aerodynamically Air Staged Burner (AASB) was used. The thermal input was maintained at 0.5 MWt for all conditions studied. The test matrix comprised of varying the Recycle Ratio (RR) between 65% and 75% and furnace exit O{sub 2} was maintained at 3%. Carbon-in-ash samples for burnout determination were also taken. Results show that the highest peak radiative heat flux and highest flame luminosity corresponded to the lowest recycle ratio. The effect of co-firing of biomass resulted in lower radiative heat fluxes for corresponding recycle ratios. Furthermore, the highest levels of radiative heat flux corresponded to the lowest convective heat flux. Results are compared to air firing and the air equivalent radiative and convective heat fluxes are fuel type dependent. Reasons for these differences are discussed in the main text. Burnout improves with biomass co-firing under both air and oxy-fuel firing conditions and burnout is also seen to improve under oxy-fuel firing conditions compared to air. (author)

Smart, John P.; Patel, Rajeshriben; Riley, Gerry S. [RWEnpower, Windmill Hill Business Park, Whitehill Way, Swindon, Wiltshire SN5 6PB, England (United Kingdom)

2010-12-15T23:59:59.000Z

436

A Better Steam Engine: Designing a Distributed Concentrating Solar Combined Heat and Power System  

E-Print Network (OSTI)

Energy Agency Solar Heating and Cooling Programme. [43] WHOembody a stand-alone solar heating system. It is assumedrecent growth in solar-thermal heating (Weiss et al. [42]),

Norwood, Zachary Mills

2011-01-01T23:59:59.000Z

437

Wood Pellet Heating Systems: The Earthscan Expert Handbook of Planning, Design and Installation  

Science Conference Proceedings (OSTI)

Wood Pellet Heating Systems is a comprehensive handbook covering all aspects of wood pellet heating technology. The use of wood pellets as an alternative heating fuel is already well established in several countries and is becoming widespread as fossil ...

Dilwyn Jenkins

2010-04-01T23:59:59.000Z

438

Control system for heat exchangers fans in a refrigeration system  

Science Conference Proceedings (OSTI)

The paper presents a method for controlling evaporator and condenser fans in a refrigeration system. The refrigeration system includes a refrigerant circuit defined by a compressor, a condenser, a throttling device, and an evaporator. The system includes ... Keywords: controlling, fan, refrigeration system, variable frequency drive unit

Cristian Iosifescu; Valeriu Damian; C?lin Ciufudean

2010-05-01T23:59:59.000Z

439

Enhanced heat transfer for thermionic power modules  

DOE Green Energy (OSTI)

The thermionic power module is capable of operating at very high heat fluxes, which in turn serve to reduce capital costs. The most efficient operation also requires uniform heat fluxes. The development of enhanced heat transfer systems is required to meet the demand for high heat fluxes (>20 w/cm/sup 2/) at high temperatures (>1500K) which advanced thermionic power modules place upon combustion systems. Energy transfer from the hot combustion gases may take place by convection, radiation, or a combination of radiation and convection. Enhanced convective heat transfer with a jet impingement system has been demonstrated in a thermionic converter. The recently-developed cellular ceramic radiative heat transfer system has also been applied to a thermionic converter. By comparing the jet impingement and cellular ceramic radiative heat transfer systems, an appropriate system may be selected for utilization in advanced thermionic power modules. Results are reported.

Johnson, D.C.

1981-07-01T23:59:59.000Z

440

Combined Heat and Power (CHP) Systems | Department of Energy  

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

Technology Development » Smart Grid » Distributed Technology Development » Smart Grid » Distributed Energy » Combined Heat and Power (CHP) Systems Combined Heat and Power (CHP) Systems 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 industrial, supermarkets, restaurants, hospitality, health care and high-tech industries. In high-tech industries such as telecommunications, commercial data processing and internet services, the use of electronic data and signal processing have become a cornerstone in the U.S. economy. These industries represent high potential for CHP and distributed energy due to their ultra-high reliability and power quality requirements and related large

Note: This page contains sample records for the topic "radiator heating systems" 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

Total Energy Recovery System for Agribusiness. [Geothermally heated]. Final Report  

DOE Green Energy (OSTI)

An engineering and economic study was made to determine a practical balance of selected agribusiness subsystems resulting in realistic estimated produce yields for a geothermally heated system known as the Total Energy Recovery System for Agribusiness. The subsystem cycles for an average application at an unspecified hydrothermal resources site in the western United States utilize waste and by-products from their companion cycles insofar as practicable. Based on conservative estimates of current controlled environment yields, produce wholesale market prices, production costs, and capital investment required, it appears that the family-operation-sized TERSA module presents the potential for marginal recovery of all capital investment costs. In addition to family- or small-cooperative-farming groups, TERSA has potential users in food-oriented corporations and large-cooperative-agribusiness operations. The following topics are considered in detail: greenhouse tomatoes and cucumbers; fish farming; mushroom culture; biogas generation; integration methodology; hydrothermal fluids and heat exchanger selection; and the system. 133 references. (MHR)

Fogleman, S.F.; Fisher, L.A.; Black, A.R.; Singh, D.P.

1977-05-01T23:59:59.000Z

442

Engineering design aspects of the heat-pipe power system  

SciTech Connect

The Heat-pipe Power System (HPS) is a near-term, low-cost space power system designed at Los Alamos that can provide up to 1,000 kWt for many space nuclear applications. The design of the reactor is simple, modular, and adaptable. The basic design allows for the use of a variety of power conversion systems and reactor materials (including the fuel, clad, and heat pipes). This paper describes a project that was undertaken to develop a database supporting many engineering aspects of the HPS design. The specific tasks discussed in this paper are: the development of an HPS materials database, the creation of finite element models that will allow a wide variety of investigations, and the verification of past calculations.

Capell, B.M.; Houts, M.G.; Poston, D.I.; Berte, M.

1997-10-01T23:59:59.000Z

443

Progress on the heating and current drive systems for ITER  

SciTech Connect

The electron cyclotron (EC), ion cyclotron (IC), heating-neutral beam (H-NB) and, although not in the day 1 baseline, lower hybrid (LH) systems intended for ITER have been reviewed in 2007/2008 in light of progress of physics and technology in the field. Although the overall specifications are unchanged, notable changes have been approved. Firstly, it has been emphasized that the H&CD systems are vital for the ITER programme. Consequently, the full 73 MW should be commissioned and available on a routine basis before the D/T phase. Secondly, significant changes have been approved at system level, most notably: the possibility to operate the heating beams at full power during the hydrogen phase requiring new shine through protection; the possibility to operate IC with 2 antennas with increased robustness (no moving parts); the possible increase to 2 MW of key components of the EC transmission systems in order to provide an easier upgrading of the EC power as may be required by the project; the addition of a building dedicated to the RF power sources and to a testing facility for acceptance of diagnostics and heating port plugs. Thirdly, the need of a plan for developing, in time for the active phase, a CD system such as LH suitable for very long pulse operation of ITER was recognised. The review describes these changes and their rationale.

Jacquinot, J. [CEA, Cadarache, France; Beaumont, Bertrand [ITER Joint Work Site, Cadarache; Bora, D. [ITER Joint Work Site, Cadarache; Campbell, D. [ITER Joint Work Site, Cadarache; Darbos, Caroline [ITER Joint Work Site, Cadarache; Decamps, H. [ITER Organization, Saint Paul Lez Durance, France; Graceffa, J. [ITER Joint Work Site, Cadarache; Gassmann, T. [ITER Joint Work Site, Cadarache; Hemsworth, R. [ITER Joint Work Site, Cadarache; Henderson, Mark [ITER Joint Work Site, Cadarache; Kobayashi, N. [ITER Joint Work Site, Cadarache; Lamalle, Philippe [ITER Joint Work Site, Cadarache; Schunke, B. [ITER Joint Work Site, Cadarache; Tanaka, M. [ITER Joint Work Site, Cadarache; Tanga, A. [ITER Joint Work Site, Cadarache; Albajar, F. [Fusion for Energy (F4E), Barcelona, Spain; Bonicelli, T. [Fusion for Energy (F4E), Barcelona, Spain; Saibene, G. [Fusion for Energy (F4E), Barcelona, Spain; Sartori, R. [Fusion for Energy (F4E), Barcelona, Spain; Becoulet, A. [CEA, Cadarache, France; Hoang, G. T. [CEA, Cadarache, France; Inoue, T. [Japan Atomic Energy Agency (JAEA), Naka; Sakamoto, K. [Japan Atomic Energy Agency (JAEA), Naka; Takahashi, K. [Japan Atomic Energy Agency (JAEA), Naka; Watanabe, K. [Japan Atomic Energy Agency (JAEA), Naka; Goulding, Richard Howell [ORNL; Rasmussen, David A [ORNL; Swain, David W [ORNL; Chakraborty, A. [ITER India - Bhat, Gandhinagar, Gujarat; Mukherjee, A. [ITER India - Bhat, Gandhinagar, Gujarat; Rao, S. L. [ITER India - Bhat, Gandhinagar, Gujarat; Denisov, G. [Russian Academy of Science, Novgorod, Russia; Nightingale, M. [EURATOM / UKAEA, Abingdon, UK; Sonato, P. [EURATOM / ENEA, Italy

2009-06-01T23:59:59.000Z

444

Radiant Heating | Department of Energy  

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

Radiant Heating Radiant Heating Radiant Heating June 24, 2012 - 5:52pm Addthis In-wall radiant heating in a house under construction near Denver. | Photo courtesy of Warren Gretz, NREL. In-wall radiant heating in a house under construction near Denver. | Photo courtesy of Warren Gretz, NREL. Radiant heating systems supply heat directly to the floor or to panels in the wall or ceiling of a house. The systems depend largely on radiant heat transfer -- the delivery of heat directly from the hot surface to the people and objects in the room via infrared radiation. Radiant heating is the effect you feel when you can feel the warmth of a hot stovetop element from across the room. When radiant heating is located in the floor, it is often called radiant floor heating or simply floor heating.

445

Radiant Heating | Department of Energy  

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

Radiant Heating Radiant Heating Radiant Heating June 24, 2012 - 5:52pm Addthis In-wall radiant heating in a house under construction near Denver. | Photo courtesy of Warren Gretz, NREL. In-wall radiant heating in a house under construction near Denver. | Photo courtesy of Warren Gretz, NREL. Radiant heating systems supply heat directly to the floor or to panels in the wall or ceiling of a house. The systems depend largely on radiant heat transfer -- the delivery of heat directly from the hot surface to the people and objects in the room via infrared radiation. Radiant heating is the effect you feel when you can feel the warmth of a hot stovetop element from across the room. When radiant heating is located in the floor, it is often called radiant floor heating or simply floor heating.

446

The Added Economic and Environmental Value of Solar Thermal Systems in Microgrids with CombinedHeat and Power  

Science Conference Proceedings (OSTI)

The addition of solar thermal and heat storage systems can improve the economic, as well as environmental attraction of micro-generation systems, e.g. fuel cells with or without combined heat and power (CHP) and contribute to enhanced CO2 reduction. However, the interactions between solar thermal collection and storage systems and CHP systems can be complex, depending on the tariff structure, load profile, etc. In order to examine the impact of solar thermal and heat storage on CO2 emissions and annual energy costs, a microgrid's distributed energy resources (DER) adoption problem is formulated as a mixed-integer linear program. The objective is minimization of annual energy costs. This paper focuses on analysis of the optimal interaction of solar thermal systems, which can be used for domestic hot water, space heating and/or cooling, and micro-CHP systems in the California service territory of San Diego Gas and Electric (SDG&E). Contrary to typical expectations, our results indicate that despite the high solar radiation in southern California, fossil based CHP units are dominant, even with forecast 2020 technology and costs. A CO2 pricing scheme would be needed to incent installation of combined solar thermal absorption chiller systems, and no heat storage systems are adopted. This research also shows that photovoltaic (PV) arrays are favored by CO2 pricing more than solar thermal adoption.

Marnay, Chris; Stadler, Michael; Cardoso, Goncalo; Megel, Olivier; Lai, Judy; Siddiqui, Afzal

2009-08-15T23:59:59.000Z

447

Facility HVAC System Conversion to Ground Source Heat Pump Geothermal...  

Open Energy Info (EERE)

ventilators will utilize the hot water to "temper" outdoor air ventilation. Although the heat pump modules can provide both heating and cooling, the space requires heating only....

448

Spatial Variability of Net Radiation and Soil Heat Flux Density on Two Logged Sites at Montmorency, Quebec  

Science Conference Proceedings (OSTI)

Net radiation data from 32 sample points and soil heat flux density values from six sample points on two logged sites at Montmorency in 1979 are presented. The two sites were of different ages; one had been clearcut in 1975 and the other in 1978. ...

J. H. McCaughey

1982-06-01T23:59:59.000Z

449

Municipal water-based heat pump heating and/or cooling systems: Findings and recommendations. Final report  

SciTech Connect

The purpose of the present work was to determine if existing heat pump systems based on municipal water systems meet existing water quality standards, to analyze water that has passed through a heat pump or heat exchanger to determine if corrosion products can be detected, to determine residual chlorine levels in municipal waters on the inlet as well as the outlet side of such installations, to analyses for bacterial contaminants and/or regrowth due to the presence of a heat pump or heat exchanger, to develop and suggest criteria for system design and construction, to provide recommendations and specifications for material and fluid selection, and to develop model rules and regulations for the installation, operation, and monitoring of new and existing systems. In addition, the Washington State University (WSU) has evaluated availability of computer models that would allow for water system mapping, water quality modeling and system operation.

Bloomquist, R.G. [Washington, State Univ., Pullman, WA (United States); Wegman, S. [South Dakota Utilities Commission (United States)

1998-04-01T23:59:59.000Z

450

Natural convection heat exchangers for solar water heating systems. Technical progress report, July 15, 1996--September 14, 1996  

DOE Green Energy (OSTI)

This report very briefly summarizes project objectives, results, and current activities. The goals of the 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. Results include the experimental study of thermosyphon heat exchangers, which led to modeling equations that correlate the overall heat transfer coefficient-area product (UA) to mixed convection regime parameters. Current activities include the development and evaluation of a side-arm heat exchanger computer model and modification of the experimental facility for fundamental heat exchanger studies.

Davidson, J.H.

1998-06-01T23:59:59.000Z

451

Examination system utilizing ionizing radiation and a flexible, miniature radiation detector probe  

DOE Patents (OSTI)

An optimized examination system and method based on the Reverse Geometry X-Ray.RTM. (RGX.RTM.) radiography technique are presented. The examination system comprises a radiation source, at least one flexible, miniature radiation detector probe positioned in appropriate proximity to the object to be examined and to the radiation source with the object located between the source and the probe, a photodetector device attachable to an end of the miniature radiation probe, and a control unit integrated with a display device connected to the photodetector device. The miniature radiation detector probe comprises a scintillation element, a flexible light guide having a first end optically coupled to the scintillation element and having a second end attachable to the photodetector device, and an opaque, environmentally-resistant sheath surrounding the flexible light guide. The probe may be portable and insertable, or may be fixed in place within the object to be examined. An enclosed, flexible, liquid light guide is also presented, which comprises a thin-walled flexible tube, a liquid, preferably mineral oil, contained within the tube, a scintillation element located at a first end of the tube, closures located at both ends of the tube, and an opaque, environmentally-resistant sheath surrounding the flexible tube. The examination system and method have applications in non-destructive material testing for voids, cracks, and corrosion, and may be used in areas containing hazardous materials. In addition, the system and method have applications for medical and dental imaging.

Majewski, Stanislaw (Grafton, VA); Kross, Brian J. (Yorktown, VA); Zorn, Carl J. (Yorktown, VA); Majewski, Lukasz A. (Grafton, VA)

1996-01-01T23:59:59.000Z

452

Examination system utilizing ionizing radiation and a flexible, miniature radiation detector probe  

DOE Patents (OSTI)

An optimized examination system and method based on the Reverse Geometry X-Ray{trademark} (RGX{trademark}) radiography technique are presented. The examination system comprises a radiation source, at least one flexible, miniature radiation detector probe positioned in appropriate proximity to the object to be examined and to the radiation source with the object located between the source and the probe, a photodetector device attachable to an end of the miniature radiation probe, and a control unit integrated with a display device connected to the photodetector device. The miniature radiation detector probe comprises a scintillation element, a flexible light guide having a first end optically coupled to the scintillation element and having a second end attachable to the photodetector device, and an opaque, environmentally-resistant sheath surrounding the flexible light guide. The probe may be portable and insertable, or may be fixed in place within the object to be examined. An enclosed, flexible, liquid light guide is also presented, which comprises a thin-walled flexible tube, a liquid, preferably mineral oil, contained within the tube, a scintillation element located at a first end of the tube, closures located at both ends of the tube, and an opaque, environmentally-resistant sheath surrounding the flexible tube. The examination system and method have applications in non-destructive material testing for voids, cracks, and corrosion, and may be used in areas containing hazardous materials. In addition, the system and method have applications for medical and dental imaging. 5 figs.

Majewski, S.; Kross, B.J.; Zorn, C.J.; Majewski, L.A.

1996-10-22T23:59:59.000Z

453

COMPARATIVE STUDY AMONG HYBRID GROUND SOURCE HEAT PUMP SYSTEM, COMPLETE GROUND SOURCE HEAT PUMP AND CONVENTIONAL HVAC SYSTEM  

DOE Green Energy (OSTI)

In this paper, a hotel with hybrid geothermal heat pump system (HyGSHP) in the Pensacola is selected and simulated by the transient simulation software package TRNSYS [1]. To verify the simulation results, the validations are conducted by using the monthly average entering water temperature, monthly facility consumption data, and etc. And three types of HVAC systems are compared based on the same building model and HVAC system capacity. The results are presented to show the advantages and disadvantages of HyGSHP compared with the other two systems in terms of energy consumptions, life cycle cost analysis.

Jiang Zhu; Yong X. Tao

2011-11-01T23:59:59.000Z

454

Technology assessment of external heat systems for Stirling heat pumps. Final report  

SciTech Connect

A technology assessment and design improvement effort was undertaken for the Stirling engine heat pump external heat system (EHS) in order to reduce costs. It was found that only two applicable EHS design approaches have been developed to any extent: a relatively undeveloped design featuring a premixed fuel and air transpiration burner, and a turbulent diffusion type burner system developed by Mechanical Technology, Inc. To evaluate and optimize the design concepts, an analytical model was developed that examined design and performance variables. The model calculated key temperatures, allowing the specification of materials requirements. Adherence to American National Standards Institute appliance furnace code material specifications was assumed. Concepts for EHS control systems were evaluated, and a cost-effective control system design was developed for the turbulent diffusion burner EHS. The study reveals that optimizing the diffusion burner EHS design can result in significant cost savings. No clear choice between the diffusion burner and transpiration burner systems could be determined from this study, but the designs of both were further developed and improved. Estimates show the EHS based on a transpiration burner to have a manufactured cost that is roughly 70% of the turbulent diffusion burner EHS cost, but fuel efficiency is lower by about 18%.

Vasilakis, A.D. [Advanced Mechanical Technology, Inc., Newton, MA (United States)