National Library of Energy BETA

Sample records for mini-split heat pumps

  1. Ductless, Mini-Split Heat Pump Basics

    Broader source: Energy.gov [DOE]

    Ductless, mini-split-system heat pumps (mini splits), as their name implies, do not have ducts. Therefore, they make good retrofit add-ons to houses or buildings with "non-ducted" heating systems, such as hydronic (hot water heat), radiant panels, and space heaters (wood, kerosene, propane).

  2. Ductless, Mini-Split Heat Pumps | Department of Energy

    Energy Savers [EERE]

    Heat Pump Systems Ductless, Mini-Split Heat Pumps Ductless, Mini-Split Heat Pumps ... Learn More Heat pump systems Air-source heat pumps Geothermal heat pumps Absorption heat ...

  3. Ductless, Mini-Split Heat Pumps | Department of Energy

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

    remodel and your home does not have heating and cooling ducts, a ductless mini-split heat pump may be a cost-effective, energy-efficient choice. Ductless, mini-split-system heat...

  4. Field Monitoring Protocol: Mini-Split Heat Pumps

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

    ... Introduction The mini-split heat pump ... is termed a multi-split heat pump, and ... replacement system for electric resistance heating where natural gas is not available. ...

  5. Ductless, Mini-Split Heat Pumps | Department of Energy

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

    Heat & Cool » Heat Pump Systems » Ductless, Mini-Split Heat Pumps Ductless, Mini-Split Heat Pumps Ductless, mini-split-system heat pumps (mini splits) make good retrofit add-ons to houses with "non-ducted" heating systems, such as hydronic (hot water heat), radiant panels, and space heaters (wood, kerosene, propane). They can also be a good choice for room additions where extending or installing distribution ductwork is not feasible, and very efficient new homes that require only

  6. Field Monitoring Protocol: Mini-Split Heat Pumps

    SciTech Connect (OSTI)

    Christensen, D.; Fang, X.; Tomerlin, J.; Winkler, J.; Hancock, E.

    2011-03-01

    The report provides a detailed method for accurately measuring and monitoring performance of a residential Mini-Split Heat Pump. It will be used in high-performance retrofit applications, and as part of DOE's Building America residential research program.

  7. Field Monitoring Protocol. Mini-Split Heat Pumps

    SciTech Connect (OSTI)

    Christensen, Dane; Fang, Xia; Tomerlin, Jeff; Winkler, Jon; Hancock, E.

    2011-03-01

    This Building America program report provides a detailed method for accurately measuring and monitoring performance of a residential mini-split heat pump, which will be used in high-performance retrofit applications.

  8. Mini-Split Heat Pumps Multifamily Retrofit Feasibility Study

    SciTech Connect (OSTI)

    Dentz, Jordan; Podorson, David; Varshney, Kapil

    2014-05-01

    Mini-split heat pumps can provide space heating and cooling in many climates and are relatively affordable. These and other features make them potentially suitable for retrofitting into multifamily buildings in cold climates to replace electric resistance heating or other outmoded heating systems. This report investigates the suitability of mini-split heat pumps for multifamily retrofits. Various technical and regulatory barriers are discussed and modeling was performed to compare long-term costs of substituting mini-splits for a variety of other heating and cooling options. A number of utility programs have retrofit mini-splits in both single family and multifamily residences. Two such multifamily programs are discussed in detail.

  9. Ductless Mini-Split Heat Pump Comfort Evaluation

    SciTech Connect (OSTI)

    Roth, K.; Sehgal, N.; Akers, C.

    2013-03-01

    Field tests were conducted in two homes in Austin, TX to evaluate the comfort performance of ductless mini-split heat pumps (DMSHPs), measuring temperature and relative humidity measurements in four rooms in each home before and after retrofitting a central HVAC system with DMSHPs.

  10. Replacing Resistance Heating with Mini-Split Heat Pumps, Sharon, Connecticut (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-05-01

    Mini-split heat pumps can provide space heating and cooling in many climates and are relatively affordable. These and other features make them potentially suitable for retrofitting into multifamily buildings in cold climates to replace electric resistance heating or other outmoded heating systems. This report investigates the suitability of mini-split heat pumps for multifamily retrofits. Various technical and regulatory barriers are discussed and modeling was performed to compare long-term costs of substituting mini-splits for a variety of other heating and cooling options. A number of utility programs have retrofit mini-splits in both single family and multifamily residences. Two such multifamily programs are discussed in detail.

  11. Laboratory Test Report for Fujitsu 12RLS and Mitsubishi FE12NA Mini-Split Heat Pumps

    SciTech Connect (OSTI)

    Winkler, Jon

    2011-09-01

    Mini-split heat pumps are being proposed as a new retrofit option to replace resistance heating in the Pacific Northwest. NREL has previously developed a field test protocol for mini-split systems to ensure consistent results from field tests. This report focuses on the development of detailed system performance maps for mini-split heat pumps so that the potential benefits of mini-split systems can be accurately analyzed for different climate regions and housing types.

  12. Ductless Mini-Split Heat Pump Comfort Evaluation

    SciTech Connect (OSTI)

    Roth, K.; Sehgal, N.; Akers, C.

    2013-03-01

    Field tests were conducted in two homes in Austin, TX, to evaluate the comfort performance of ductless minisplit heat pumps (DMSHPs), measuring temperature and relative humidity measurements in four rooms in each home before and after retrofitting a central HVAC system with DMSHPs.

  13. NREL Documents Efficiency of Mini-Split Heat Pumps (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-06-01

    A new report delivers mini-split heat pump (MSHP) performance data for use in whole-building simulation tools. Mini-split heat pumps (MSHPs) are highly efficient refrigerant-based air conditioning and heating systems that permit room-by-room conditioning and control in homes. Because of their size, efficiency, and price, MSHPs are very popular overseas and are gaining market share in energy-efficient home upgrades in the United States. They are a good option for retrofitting older homes that lack ductwork. To evaluate MSHP cost effectiveness and performance in U.S. homes, National Renewable Energy Laboratory (NREL) researchers are studying these systems in the laboratory, simulated buildings, and field test settings. A new NREL report describes an innovative laboratory approach to testing MSHPs and includes experimental performance maps for use in whole-building simulation tools. Most public information on MSHP performance is provided by equipment manufacturers, and is typically limited to performance at a single operating speed for heating and cooling. Mini-split heat pumps use variable speed components that spin up and down to continuously meet the heating or cooling need, significantly improving a system's operating efficiency. Measuring that efficiency in a laboratory is challenging and required new approaches to performance testing. NREL researchers worked with colleagues at Purdue University's Herrick Labs and Ecotope, Inc. to refine and apply this new approach to a suite of MSHP products. Researchers measured the performance of two MSHPs across a variety of operating conditions, which allowed, for the first time, development of accurate building simulation MSHP models. In the laboratory tests, researchers found that both MSHPs achieved manufacturer-reported performance at rating conditions. However, at other temperature and humidity conditions, the heat pumps capacity ranged from 40% above to 54% below the manufacturer-reported values. Knowing how

  14. Heating and Cooling with Mini Splits in the Northeast

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

    buildingscience.com Heating and Cooling with Mini Splits in the Northeast Kohta Ueno October 23, 2014 2014 BA Webinar Mini Splits in Northeast 2 © buildingscience.com Background 2014 BA Webinar Mini Splits in Northeast 3 © buildingscience.com Overview  Transformations, Inc. currently building net-zero homes in Massachusetts  Mini split heat pumps (MSHPs) part of builder's strategy: tradeoff package  Single point of heating/ cooling on each floor  BA study of temperatures throughout

  15. Laboratory Test Report for Fujitsu 12RLS and Mitsubishi FE12NA Mini-Split Heat Pumps

    SciTech Connect (OSTI)

    Winkler, J.

    2011-09-01

    Mini-split heat pumps are being proposed as a new retrofit option to replace resistance heating in the Pacific Northwest. NREL has previously developed a field test protocol for mini-split systems to ensure consistent results from field tests. This report focuses on the development of detailed system performance maps for mini-split heat pumps so that the potential benefits of mini-split systems can be accurately analyzed for different climate regions and housing types. This report presents laboratory test results for two mini-split heat pumps. Steady-state heating and cooling performance for the Fujitsu 12RLS and Mitsubishi FE12NA was tested under a wide range of outdoor and indoor temperatures at various compressor and fan speeds. Cycling performance for each unit was also tested under both modes of operation. Both systems performed quite well under low loads and the experimental test data aligned with manufacturer reported values. Adequate datasets were attained to promote performance modeling of these two systems in the future.

  16. Long-Term Monitoring of Mini-Split Ductless Heat Pumps in the Northeast

    SciTech Connect (OSTI)

    Ueno, K.; Loomis, H.

    2015-06-01

    Transformations, Inc. has extensive experience building their high performance housing at a variety of Massachusetts locations, in both a production and custom home setting. The majority of their construction uses mini-split heat pumps (MSHPs) for space conditioning. This research covered the long-term performance of MSHPs in Zone 5A; it is the culmination of up to 3 years' worth of monitoring in a set of eight houses. This research examined electricity use of MSHPs, distributions of interior temperatures and humidity when using simplified (two-point) heating systems in high-performance housing, and the impact of open-door/closed-door status on temperature distributions. The use of simplified space conditioning distribution (through use of MSHPs) provides significant first cost savings, which are used to offset the increased investment in the building enclosure.

  17. NREL Documents Efficiency of Mini-Split Heat Pumps (Fact Sheet), NREL Highlights, Research & Development, NREL (National Renewable Energy Laboratory)

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

    report delivers MSHP performance data for use in whole-building simulation tools. Mini-split heat pumps (MSHPs) are highly efficient refrigerant-based air conditioning and heating systems that permit room-by-room conditioning and control in homes. Because of their size, efficiency, and price, MSHPs are very popular overseas and are gaining market share in energy-efficient home upgrades in the United States. They are a good option for retrofitting older homes that lack ductwork. To evaluate MSHP

  18. Technology Solutions Case Study: Long-Term Monitoring of Mini-Split Ductless Heat Pumps in the Northeast, Devens and Easthampton, Massachusetts

    SciTech Connect (OSTI)

    2015-07-01

    Transformations, Inc., has extensive experience building high-performance homes - production and custom - in a variety of Massachusetts locations and uses mini-split heat pumps (MSHPs) for space conditioning in most of its homes. The use of MSHPs for simplified space-conditioning distribution provides significant first-cost savings, which offsets the increased investment in the building enclosure. In this project, the U.S. Department of Energy Building America team Building Science Corporation evaluated the long-term performance of MSHPs in 8 homes during a period of 3 years. The work examined electrical use of MSHPs, distributions of interior temperatures and humidity when using simplified (two-point) heating systems in high-performance housing, and the impact of open-door/closed-door status on temperature distributions.

  19. Ductless Mini-Split Air Conditioners | Department of Energy

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

    Ductless Mini-Split Air Conditioners Ductless Mini-Split Air Conditioners A ductless mini-split air conditioner is one solution to cooling part of a house. | Photo courtesy of ©iStockphoto/LUke1138. A ductless mini-split air conditioner is one solution to cooling part of a house. | Photo courtesy of ©iStockphoto/LUke1138. Ductless, mini split-system air-conditioners (mini splits) have numerous potential applications in residential, commercial, and institutional buildings. The most common

  20. Ductless Mini-Split Air Conditioners | Department of Energy

    Office of Environmental Management (EM)

    Mini-Split Air Conditioners A ductless mini-split air conditioner is one solution to cooling part of a house. | Photo courtesy of iStockphotoLUke1138. A ductless...

  1. Rotary magnetic heat pump

    DOE Patents [OSTI]

    Kirol, L.D.

    1987-02-11

    A rotary magnetic heat pump constructed without flow seals or segmented rotor accomplishes recuperation and regeneration by using split flow paths. Heat exchange fluid pumped through heat exchangers and returned to the heat pump splits into two flow components: one flowing counter to the rotor rotation and one flowing with the rotation. 5 figs.

  2. Rotary magnetic heat pump

    DOE Patents [OSTI]

    Kirol, Lance D.

    1988-01-01

    A rotary magnetic heat pump constructed without flow seals or segmented rotor accomplishes recuperation and regeneration by using split flow paths. Heat exchange fluid pumped through heat exchangers and returned to the heat pump splits into two flow components: one flowing counter to the rotor rotation and one flowing with the rotation.

  3. Geothermal Heat Pump Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    ARI-320 Water-Source Heat Pumps 10 ARI-325 Ground Water-Source Heat Pumps 13 ARI-330 Ground Source Closed-Loop Heat Pumps 11 ARI-870 Direct Geoexhange Heat Pumps 2 Other Non-ARI ...

  4. Absorption heat pump system

    DOE Patents [OSTI]

    Grossman, G.

    1982-06-16

    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.

  5. Absorption heat pump system

    DOE Patents [OSTI]

    Grossman, Gershon

    1984-01-01

    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.

  6. Ductless Heat Pumps

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

    & Events Expand News & Events Skip navigation links Residential Residential Lighting Energy Star Appliances Consumer Electronics Heat Pump Water Heaters Electric Storage Water...

  7. Heat Pump Water Heaters

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

    & Events Expand News & Events Skip navigation links Residential Residential Lighting Energy Star Appliances Consumer Electronics Heat Pump Water Heaters Electric Storage Water...

  8. Geothermal Heat Pump Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    defined as geothermal heat pump unit with all the necessary functional components, except for installation materials. These include geothermal heat pump, air handler, heat ...

  9. Multiple source heat pump

    DOE Patents [OSTI]

    Ecker, Amir L.

    1983-01-01

    A heat pump apparatus for conditioning a fluid characterized by a fluid handler and path for circulating a fluid in heat exchange relationship with a refrigerant fluid, at least three refrigerant heat exchangers, one for effecting heat exchange with the fluid, a second for effecting heat exchange with a heat exchange fluid, and a third for effecting heat exchange with ambient air; a compressor for compressing the refrigerant; at least one throttling valve connected at the inlet side of a heat exchanger in which liquid refrigerant is vaporized; a refrigerant circuit; refrigerant; a source of heat exchange fluid; heat exchange fluid circuit and pump for circulating the heat exchange fluid in heat exchange relationship with the refrigerant; and valves or switches for selecting the heat exchangers and directional flow of refrigerant therethrough for selecting a particular mode of operation. Also disclosed are a variety of embodiments, modes of operation, and schematics therefor.

  10. Geothermal Heat Pumps | Department of Energy

    Energy Savers [EERE]

    Heat Pump Systems Geothermal Heat Pumps Geothermal Heat Pumps Watch how geothermal heat ... As with any heat pump, geothermal and water-source heat pumps are able to heat, cool, and, ...

  11. Dual source heat pump

    DOE Patents [OSTI]

    Ecker, Amir L.; Pietsch, Joseph A.

    1982-01-01

    What is disclosed is a heat pump apparatus for conditioning a fluid characterized by a fluid handler and path for circulating the fluid in heat exchange relationship with a refrigerant fluid; at least two refrigerant heat exchangers, one for effecting heat exchange with the fluid and a second for effecting heat exchange between refrigerant and a heat exchange fluid and the ambient air; a compressor for efficiently compressing the refrigerant; at least one throttling valve for throttling liquid refrigerant; a refrigerant circuit; refrigerant; a source of heat exchange fluid; heat exchange fluid circulating device and heat exchange fluid circuit for circulating the heat exchange fluid in heat exchange relationship with the refrigerant; and valves or switches for selecting the heat exchangers and direction of flow of the refrigerant therethrough for selecting a particular mode of operation. The heat exchange fluid provides energy for defrosting the second heat exchanger when operating in the air source mode and also provides a alternate source of heat.

  12. Geothermal Heat Pump Manufacturing Activities

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    8 Geothermal heat pump shipments by origin, 2008 and 2009 (rated capacity in tons) Origin ... Administration (EIA), Form EIA-902, "Annual Geothermal Heat Pump Manufacturers Survey

  13. Geothermal Heat Pump Manufacturing Activities

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    0 Geothermal heat pump domestic shipments by customer type, 2008 and 2009 (rated capacity ... Administration (EIA), Form EIA-902, "Annual Geothermal Heat Pump Manufacturers Survey

  14. Geothermal Heat Pump Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    1 Geothermal heat pump domestic shipments by sector and model type, 2009 (rated capacity ... Administration (EIA), Form EIA-902, "Annual Geothermal Heat Pump Manufacturers Survey

  15. Geothermal Heat Pump Manufacturing Activities

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    Geothermal heat pump shipments by model type, 2000 - 2009 (number of units) ARI-320 ... Administration (EIA), Form EIA-902, "Annual Geothermal Heat Pump Manufacturers Survey."

  16. Geothermal Heat Pump Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    Rated capacity of geothermal heat pump shipments by model type, 2000 - 2009 (tons) ARI-320 ... Administration (EIA), Form EIA-902, "Annual Geothermal Heat Pump Manufacturers Survey."

  17. Geothermal Heat Pump Manufacturing Activities

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    Type of Activity 2008 2009 Geothermal Heat Pump or System Design 17 17 Prototype Geothermal Heat Pump Development 12 13 Prototype Systems Geothermal Development 5 7 Wholesale ...

  18. Absorption Heat Pumps | Department of Energy

    Energy Savers [EERE]

    Heat Pump Systems Absorption Heat Pumps Absorption Heat Pumps Absorption heat pumps are ... As in a standard heat pump, the refrigerant (in this case, ammonia) is condensed in one ...

  19. Hydride heat pump

    DOE Patents [OSTI]

    Cottingham, James G.

    1977-01-01

    Method and apparatus for the use of hydrides to exhaust heat from one temperature source and deliver the thermal energy extracted for use at a higher temperature, thereby acting as a heat pump. For this purpose there are employed a pair of hydridable metal compounds having different characteristics working together in a closed pressure system employing a high temperature source to upgrade the heat supplied from a low temperature source.

  20. Chemical heat pump

    DOE Patents [OSTI]

    Greiner, Leonard

    1980-01-01

    A chemical heat pump system is disclosed for use in heating and cooling structures such as residences or commercial buildings. The system is particularly adapted to utilizing solar energy, but also increases the efficiency of other forms of thermal energy when solar energy is not available. When solar energy is not available for relatively short periods of time, the heat storage capacity of the chemical heat pump is utilized to heat the structure as during nighttime hours. The design also permits home heating from solar energy when the sun is shining. The entire system may be conveniently rooftop located. In order to facilitate installation on existing structures, the absorber and vaporizer portions of the system may each be designed as flat, thin wall, thin pan vessels which materially increase the surface area available for heat transfer. In addition, this thin, flat configuration of the absorber and its thin walled (and therefore relatively flexible) construction permits substantial expansion and contraction of the absorber material during vaporization and absorption without generating voids which would interfere with heat transfer. The heat pump part of the system heats or cools a house or other structure through a combination of evaporation and absorption or, conversely, condensation and desorption, in a pair of containers. A set of automatic controls change the system for operation during winter and summer months and for daytime and nighttime operation to satisfactorily heat and cool a house during an entire year. The absorber chamber is subjected to solar heating during regeneration cycles and is covered by one or more layers of glass or other transparent material. Daytime home air used for heating the home is passed at appropriate flow rates between the absorber container and the first transparent cover layer in heat transfer relationship in a manner that greatly reduce eddies and resultant heat loss from the absorbant surface to ambient atmosphere.

  1. Absorption heat pump system

    DOE Patents [OSTI]

    Grossman, Gershon; Perez-Blanco, Horacio

    1984-01-01

    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.

  2. Heat pump apparatus

    DOE Patents [OSTI]

    Nelson, Paul A.; Horowitz, Jeffrey S.

    1983-01-01

    A heat pump apparatus including a compact arrangement of individual tubular reactors containing hydride-dehydride beds in opposite end sections, each pair of beds in each reactor being operable by sequential and coordinated treatment with a plurality of heat transfer fluids in a plurality of processing stages, and first and second valves located adjacent the reactor end sections with rotatable members having multiple ports and associated portions for separating the hydride beds at each of the end sections into groups and for simultaneously directing a plurality of heat transfer fluids to the different groups. As heat is being generated by a group of beds, others are being regenerated so that heat is continuously available for space heating. As each of the processing stages is completed for a hydride bed or group of beds, each valve member is rotated causing the heat transfer fluid for the heat processing stage to be directed to that bed or group of beds. Each of the end sections are arranged to form a closed perimeter and the valve member may be rotated repeatedly about the perimeter to provide a continuous operation. Both valves are driven by a common motor to provide a coordinated treatment of beds in the same reactors. The heat pump apparatus is particularly suitable for the utilization of thermal energy supplied by solar collectors and concentrators but may be used with any source of heat, including a source of low-grade heat.

  3. Acoustical heat pumping engine

    DOE Patents [OSTI]

    Wheatley, J.C.; Swift, G.W.; Migliori, A.

    1983-08-16

    The disclosure is directed to an acoustical heat pumping engine without moving seals. A tubular housing holds a compressible fluid capable of supporting an acoustical standing wave. An acoustical driver is disposed at one end of the housing and the other end is capped. A second thermodynamic medium is disposed in the housing near to but spaced from the capped end. Heat is pumped along the second thermodynamic medium toward the capped end as a consequence both of the pressure oscillation due to the driver and imperfect thermal contact between the fluid and the second thermodynamic medium. 2 figs.

  4. Acoustical heat pumping engine

    DOE Patents [OSTI]

    Wheatley, John C.; Swift, Gregory W.; Migliori, Albert

    1983-08-16

    The disclosure is directed to an acoustical heat pumping engine without moving seals. A tubular housing holds a compressible fluid capable of supporting an acoustical standing wave. An acoustical driver is disposed at one end of the housing and the other end is capped. A second thermodynamic medium is disposed in the housing near to but spaced from the capped end. Heat is pumped along the second thermodynamic medium toward the capped end as a consequence both of the pressure oscillation due to the driver and imperfect thermal contact between the fluid and the second thermodynamic medium.

  5. Guide to Geothermal Heat Pumps

    SciTech Connect (OSTI)

    2011-02-01

    Geothermal heat pumps, also known as ground source heat pumps, geoexchange, water-source, earth-coupled, and earth energy heat pumps, take advantage of this resource and represent one of the most efficient and durable options on the market to heat and cool your home.

  6. Chemical heat pump

    DOE Patents [OSTI]

    Greiner, Leonard

    1984-01-01

    A chemical heat pump system is disclosed for use in heating and cooling structures such as residences or commercial buildings. The system is particularly adapted to utilizing solar energy, but also increases the efficiency of other forms of thermal energy when solar energy is not available. When solar energy is not available for relatively short periods of time, the heat storage capacity of the chemical heat pump is utilized to heat the structure, as during nighttime hours. The design also permits home heating from solar energy when the sun is shining. The entire system may be conveniently rooftop located. In order to facilitate intallation on existing structures, the absorber and vaporizer portions of the system may each be designed as flat, thin wall, thin pan vessels which materially increase the surface area available for heat transfer. In addition, this thin, flat configuration of the absorber and its thin walled (and therefore relatively flexible) construction permits substantial expansion and contraction of the absorber material during vaporization and absorption without generating voids which would interfere with heat transfer.

  7. Chemical heat pump

    DOE Patents [OSTI]

    Greiner, Leonard

    1984-01-01

    A chemical heat pump system is disclosed for use in heating and cooling structures such as residences or commercial buildings. The system is particularly adapted to utilizing solar energy, but also increases the efficiency of other forms of thermal energy when solar energy is not available. When solar energy is not available for relatively short periods of time, the heat storage capacity of the chemical heat pump is utilized to heat the structure, as during nighttime hours. The design also permits home heating from solar energy when the sun is shining. The entire system may be conveniently rooftop located. In order to faciliate installation on existing structures, the absorber and vaporizer portions of the system may each be designed as flat, thin wall, thin pan vessels which materially increase the surface area available for heat transfer. In addition, this thin, flat configuration of the absorber and its thin walled (and therefore relatively flexible) construction permits substantial expansion and contraction of the absorber material during vaporization and absorption without generating voids which would interfere with heat transfer.

  8. Chemical heat pump

    DOE Patents [OSTI]

    Greiner, Leonard

    1984-01-01

    A chemical heat pump system is disclosed for use in heating and cooling structures such as residences or commercial buildings. The system is particularly adapted to utilizing solar energy, but also increases the efficiency of other forms of thermal energy when solar energy is not available. When solar energy is not available for relatively short periods of time, the heat storage capacity of the chemical heat pump is utilized to heat the structure, as during nighttime hours. The design also permits home heating from solar energy when the sun is shining. The entire system may be conveniently rooftop located. In order to facilitate installation on existing structures, the absorber and vaporizer portions of the system may each be designed as flat, thin wall, thin pan vessels which materially increase the surface area available for heat transfer. In addition, this thin, flat configuration of the absorber and its thin walled (and therefore relatively flexible) construction permits substantial expansion and contraction of the absorber material during vaporization and absorption without generating voids which would interfere with heat transfer.

  9. Chemical heat pump

    DOE Patents [OSTI]

    Greiner, Leonard

    1981-01-01

    A chemical heat pump system is disclosed for use in heating and cooling structures such as residences or commercial buildings. The system is particularly adapted to utilizing solar energy, but also increases the efficiency of other forms of thermal energy when solar energy is not available. When solar energy is not available for relatively short periods of time, the heat storage capacity of the chemical heat pump is utilized to heat the structure, as during nighttime hours. The design also permits home heating from solar energy when the sun is shining. The entire system may be conveniently rooftop located. In order to facilitate installation on existing structures, the absorber and vaporizer portions of the system may each be designed as flat, thin wall, thin pan vessels which materially increase the surface area available for heat transfer. In addition, this thin, flat configuration of the absorber and its thin walled (and therefore relatively flexible) construction permits substantial expansion and contraction of the absorber material during vaporization and absorption without generating voids which would interfere with heat transfer.

  10. Geothermal Heat Pump Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    6 Geothermal heat pump-related sales as a percentage of total company sales revenue, 2008 ... U.S. Energy Information Administration (EIA), Form EIA-902, "Annual Geothermal Heat Pump

  11. Heat Pump Swimming Pool Heaters

    Broader source: Energy.gov [DOE]

    If you want an energy-efficient way to heat your swimming pool, consider using a heat pump pool heater in mild climates.

  12. Energy 101: Geothermal Heat Pumps

    Broader source: Energy.gov [DOE]

    An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe ...

  13. Building America Technology Solutions for New and Existing Homes...

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

    Replacing Resistance Heating with Mini-Split Heat Pumps Building America Technology Solutions for New and Existing Homes: Replacing Resistance Heating with Mini-Split Heat Pumps In...

  14. Stirling and Vuilleumier heat pumps

    SciTech Connect (OSTI)

    Wurm, J.

    1990-01-01

    The book discuses the design, application, and performance evaluation of integrated engine-refrigerator heat pumps and provides an overview of heat pump theory, including a unique comparative analysis of six integrated Stirling and Vuilleumier heat pumps and their advantages in applications. It also evaluates the effect of key components on performance; lists and documents computer programs for comparative analysis; and summarizes current hardware development programs.

  15. Geothermal Heat Pump Benefits Webinar | Department of Energy

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

    Pump Benefits Webinar Geothermal Heat Pump Benefits Webinar

  16. Heat Pump Water Heaters | Department of Energy

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

    Heat Pump Water Heaters Heat Pump Water Heaters A diagram of a heat pump water heater. A diagram of a heat pump water heater. Most homeowners who have heat pumps use them to heat and cool their homes. But a heat pump also can be used to heat water -- either as stand-alone water heating system, or as combination water heating and space conditioning system. How They Work Heat pump water heaters use electricity to move heat from one place to another instead of generating heat directly. Therefore,

  17. Geothermal Heat Pump Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    ARI-320 ARI-325330 ARI-870 Other Non-ARI Rated 2008 13.1 19.5 17.5 13.5 2009 14.6 20.4 18.2 14.3 ARI-320 Water-Source Heat Pumps. ARI-325 Ground Water-Source Heat Pumps. ...

  18. Geothermal Heat Pump Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    ARI-320 ARI-325330 ARI-870 Other Non-ARI Rated 2008 4.4 4.0 4.2 3.6 2009 3.9 4.1 4.3 3.8 ARI-320 Water-Source Heat Pumps. ARI-325 Ground Water-Source Heat Pumps. ARI-330 ...

  19. Absorption Heat Pumps | Department of Energy

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

    Heat Pump Systems » Absorption Heat Pumps Absorption Heat Pumps Absorption heat pumps are essentially air-source heat pumps driven not by electricity, but by a heat source such as natural gas, propane, solar-heated water, or geothermal-heated water. Because natural gas is the most common heat source for absorption heat pumps, they are also referred to as gas-fired heat pumps. There are also absorption (or gas-fired) coolers available that work on the same principle. Unlike some absorption heat

  20. DOE Science Showcase - Heat Pump Research | OSTI, US Dept of...

    Office of Scientific and Technical Information (OSTI)

    HEATING PERFORMANCE GEOTHERMAL HEATING WATER SOURCE HEAT PUMPS EVALUATION DOCUMENT ... Geothermal Heat Pumps - Heating Mode Cooling Mode Animations Heat Pump Water Heaters ...

  1. North Village Ground Source Heat Pumps | Department of Energy

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

    North Village Ground Source Heat Pumps North Village Ground Source Heat Pumps Overview: Installation of Ground Source Heat Pumps. Replacement of Aging Heat Pumps. Alignment with ...

  2. Heat Pump Water Heaters | Department of Energy

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

    A diagram of a heat pump water heater. A diagram of a heat pump water heater. What does this mean for me? Heat pump water heaters can be two to three times more energy efficient...

  3. Heat pump system

    DOE Patents [OSTI]

    Swenson, Paul F.; Moore, Paul B.

    1979-01-01

    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.

  4. Heat pump system

    DOE Patents [OSTI]

    Swenson, Paul F.; Moore, Paul B.

    1982-01-01

    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.

  5. Geothermal Heat Pumps | Department of Energy

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

    Pumps Geothermal Heat Pumps Two commercial 36-ton geothermal heat pumps being used at the College of Southern Idaho. The Geothermal Technologies Office focuses only on electricity generation. For additional information about geothermal heating and cooling and ground source heat pumps, please visit the U.S. Department of Energy (DOE)'s Buildings Technologies Office. The geothermal heat pump, also known as the ground source heat pump, is a highly efficient renewable energy technology that is

  6. Field Monitoring Protocol: Heat Pump Water Heaters

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

    Field Monitoring Protocol: Heat Pump Water Heaters B. Sparn, L. Earle, D. Christensen, J. ... 2013 Field Monitoring Protocol: Heat Pump Water Heaters B. Sparn, L. Earle, D. ...

  7. Energy 101: Geothermal Heat Pumps

    ScienceCinema (OSTI)

    None

    2013-05-29

    An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe "loops" containing water. This edition of Energy 101 explores the benefits Geothermal and the science behind how it all comes together.

  8. Geothermal Heat Pump Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    4 Employment in the geothremal heat pump industry, 2007 - 2009 2007 1,219 2008 1,537 2009 1,832 Year Person Years Source: U.S. Energy Information Administration (EIA), Form ...

  9. Geothermal Heat Pump Grant Program

    Broader source: Energy.gov [DOE]

    The definition of geothermal heat pump property does not include swimming pools, hot tubs, or any other energy storage device that has a primary function other than storage. In addition, systems...

  10. Absorption Heat Pump Basics | Department of Energy

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

    Heat Pump Basics Absorption Heat Pump Basics August 19, 2013 - 11:11am Addthis Absorption heat pumps are essentially air-source heat pumps driven not by electricity, but by a heat source such as natural gas, propane, solar-heated water, or geothermal-heated water. Because natural gas is the most common heat source for absorption heat pumps, they are also referred to as gas-fired heat pumps. There are also absorption coolers available that work on the same principal, but are not reversible and

  11. Heat Pump Swimming Pool Heaters | Department of Energy

    Energy Savers [EERE]

    Pump Swimming Pool Heaters Heat Pump Swimming Pool Heaters How a heat pump works. How a heat pump works. How They Work Heat pumps use electricity to capture heat and move it from ...

  12. Heat pump system

    DOE Patents [OSTI]

    Swenson, Paul F.; Moore, Paul B.

    1983-01-01

    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.

  13. Heat pump system

    DOE Patents [OSTI]

    Swenson, Paul F.; Moore, Paul B.

    1977-01-01

    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.

  14. Heat pump system

    DOE Patents [OSTI]

    Swenson, Paul F.; Moore, Paul B.

    1983-06-21

    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.

  15. Geothermal Heat Pumps | Department of Energy

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

    Heat Pump Systems » Geothermal Heat Pumps Geothermal Heat Pumps Watch how geothermal heat pumps heat and cool buildings by concentrating the naturally existing heat contained within the earth -- a clean, reliable, and renewable source of energy. Geothermal heat pumps (GHPs), sometimes referred to as GeoExchange, earth-coupled, ground-source, or water-source heat pumps, have been in use since the late 1940s. They use the constant temperature of the earth as the exchange medium instead of the

  16. Heat Pump Systems | Department of Energy

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

    Heat Pump Systems Heat Pump Systems 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. 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,

  17. Heat Pump System Basics | Department of Energy

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

    Space Heating & Cooling » 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

  18. Absorption-heat-pump system

    DOE Patents [OSTI]

    Grossman, G.; Perez-Blanco, H.

    1983-06-16

    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.

  19. Tips: Heat Pumps | Department of Energy

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

    climates, providing up to three times more heat than the energy they use. Today's heat pump can reduce your electricity use for heating by approximately 50% compared to...

  20. Geothermal Heat Pumps are Scoring High Marks

    SciTech Connect (OSTI)

    2000-08-01

    Geothermal Energy Program Office of Geothermal and Wind Technologies Geothermal Heat Pumps are Scoring High Marks Geothermal heat pumps, one of the clean energy technology stars Geothermal heat pumps (GHPs) are one of the most cost-effective heating, cooling, and water heating systems available for both residential and commercial buildings. GHPs extract heat from the ground during the heating season and discharge waste heat to the ground during the cooling season. The U.S. Environmental Protecti

  1. Bayonet heat exchangers in heat-assisted Stirling heat pump

    SciTech Connect (OSTI)

    Yagyu, S.; Fukuyama, Y.; Morikawa, T.; Isshiki, N.; Satoh, I.; Corey, J.; Fellows, C.

    1998-07-01

    The Multi-Temperature Heat Supply System is a research project creating a city energy system with lower environmental load. This system consists of a gas-fueled internal combustion engine and a heat-assisted Stirling heat pump utilizing shaft power and thermal power in a combination of several cylinders. The heat pump is mainly driven by engine shaft power and is partially assisted by thermal power from engine exhaust heat source. Since this heat pump is operated by proportioning the two energy sources to match the characteristics of the driving engine, the system is expected to produce cooling and heating water at high COP. This paper describes heat exchanger development in the project to develop a heat-assisted Stirling heat pump. The heat pump employs the Bayonet type heat exchangers (BHX Type I) for supplying cold and hot water and (BHX Type II) for absorbing exhaust heat from the driving engine. The heat exchanger design concepts are presented and their heat transfer and flow loss characteristics in oscillating gas flow are investigated. The main concern in the BHX Type I is an improvement of gas side heat transfer and the spirally finned tubes were applied to gas side of the heat exchanger. For the BHX Type II, internal heat transfer characteristics are the main concern. Shell-and-tube type heat exchangers are widely used in Stirling machines. However, since brazing is applied to the many tubes for their manufacturing processes, it is very difficult to change flow passages to optimize heat transfer and loss characteristics once they have been made. The challenge was to enhance heat transfer on the gas side to make a highly efficient heat exchanger with fewer parts. It is shown that the Bayonet type heat exchanger can have good performance comparable to conventional heat exchangers.

  2. Pioneering Heat Pump Project | Department of Energy

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

    Pioneering Heat Pump Project Pioneering Heat Pump Project Project objectives: To install and monitor an innovative WaterFurnace geothermal system that is technologically advanced and evolving; To generate hot water heating from a heat pump that uses non-ozone depleting refrigerant CO2. To demonstrate the energy efficiency of this system ground source heat pump system. gshp_aschliman_pioneering.pdf (288.65 KB) More Documents & Publications City of Eagan …Civic Ice Arena Renovation Validation

  3. Consolidated Electric Cooperative- Heat Pump and Water Heating Rebates

    Office of Energy Efficiency and Renewable Energy (EERE)

    Consolidated Electric Cooperative provides rebates to residential customers who install electric water heaters, dual-fuel heating system or geothermal heat pumps. A dual-fuel heating systems...

  4. Heat Pump Systems | Department of Energy

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

    A heat pump can provide an alternative to using your air conditioner. | Photo courtesy of iStockPhotoLordRunar. A heat pump can provide an alternative to using your air...

  5. Portland General Electric- Heat Pump Rebate Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    Portland General Electric's (PGE) Heat Pump Rebate Program offers residential customers a $200 rebate for an energy-efficient heat pump installed to PGE’s standards by a PGE-approved contractor....

  6. Ground Source Heat Pump Subprogram Overview

    Broader source: Energy.gov [DOE]

    This overview of GTP's Ground Source Heat Pump subprogram was given at GTP's Program Peer Review on May 18, 2010.

  7. Building America Technology Solutions for New and Existing Homes: Replacing

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

    Resistance Heating with Mini-Split Heat Pumps | Department of Energy Replacing Resistance Heating with Mini-Split Heat Pumps Building America Technology Solutions for New and Existing Homes: Replacing Resistance Heating with Mini-Split Heat Pumps In this project, the Advanced Residential Integrated Solutions team investigated the suitability of mini-split heat pumps for multifamily retrofits. Replacing Resistance Heating with Mini-Split Heat Pumps (638.84 KB) More Documents &

  8. Geothermal Heat Pump Manufacturing Activities - Energy Information...

    Gasoline and Diesel Fuel Update (EIA)

    ARI-320, Water-Source Heat Pumps (WSHP). These systems are installed in commercial buildings, where a central chiller or boiler supplies chilled or heated water, respectively, to ...

  9. CO2 Heat Pump Water Heater

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

    CO 2 Heat Pump Water Heater 2014 Building Technologies Office Peer Review Evaporator Kyle ... MarketAudience: Residential electric water heating Key Partners: GE Appliances CRADA ...

  10. Commercial Absorption Heat Pump Water Heater

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

    Absorption Heat Pump Water Heater 2016 Building Technologies Office Peer Review Patrick ... The target market is the hospital, hotel and full service restaurant gas hot water heating ...

  11. Tips: Heat Pumps | Department of Energy

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

    electric heating, providing up to three times more heat than the energy they use. Today's heat pump can reduce your electricity use for heating by approximately 50% compared to...

  12. Geothermal Heat Pump Benchmarking Report

    SciTech Connect (OSTI)

    1997-01-17

    A benchmarking study was conducted on behalf of the Department of Energy to determine the critical factors in successful utility geothermal heat pump programs. A Successful program is one that has achieved significant market penetration. Successfully marketing geothermal heat pumps has presented some major challenges to the utility industry. However, select utilities have developed programs that generate significant GHP sales. This benchmarking study concludes that there are three factors critical to the success of utility GHP marking programs: (1) Top management marketing commitment; (2) An understanding of the fundamentals of marketing and business development; and (3) An aggressive competitive posture. To generate significant GHP sales, competitive market forces must by used. However, because utilities have functioned only in a regulated arena, these companies and their leaders are unschooled in competitive business practices. Therefore, a lack of experience coupled with an intrinsically non-competitive culture yields an industry environment that impedes the generation of significant GHP sales in many, but not all, utilities.

  13. Residential CO2 Heat Pump Water Heater | Department of Energy

    Energy Savers [EERE]

    Residential CO2 Heat Pump Water Heater Residential CO2 Heat Pump Water Heater CO2 Heat Pump Water Heater Prototype
    Credit: Oak Ridge National Lab CO2 Heat Pump Water Heater ...

  14. Promising Technology: Heat Pump Water Heaters

    Broader source: Energy.gov [DOE]

    A heat pump water heater uses electricity to transfer heat from the ambient air to stored water, as opposed to an electric resistance water heater, which uses electricity to generate the heat directly. This enables the heat pump water heater to be 2 to 3 times as efficient as an electric resistance water heater.

  15. Supercharger for Heat Pumps in Cold Climates

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

    Supercharger for Heat Pumps in Cold Climates Thomas J. Walter Mechanical Solutions, Inc. tjw@mechsol.com 518-320-8552 April 3, 2013 DOE SBIR Grant No. SC0006162 Concept is similar to superchargers for piston engine aircraft 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: Electrically driven heat pumps are an effective method of extracting heat from ambient air. As air temperature falls, however, heat pump performance falls off, essentially limiting

  16. Promising Technology: Ground Source Heat Pumps

    Broader source: Energy.gov [DOE]

    Ground source heat pumps (GSHP) use the constant temperature of the Earth as the heat exchange medium instead of the outside air temperature. During the winter, a GSHP uses the ground as a heat source to provide heating, and during the summer, a GSHP uses the ground as a heat sink to provide cooling. Although more expensive than air-source heat pumps, GSHP’s are much more efficient, especially in cold temperatures.

  17. Heat Pump Swimming Pool Heaters | Department of Energy

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

    How a heat pump works. How a heat pump works. How They Work Heat pumps use electricity to capture heat and move it from one place to another. They don't generate heat. As the pool...

  18. Heat pump having improved defrost system

    DOE Patents [OSTI]

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

    1998-12-08

    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.

  19. Heat pump having improved defrost system

    DOE Patents [OSTI]

    Chen, Fang C.; Mei, Viung C.; Murphy, Richard W.

    1998-01-01

    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.

  20. Human Health Science Building Geothermal Heat Pumps

    Broader source: Energy.gov [DOE]

    Project objectives: Construct a ground sourced heat pump, heating, ventilation, and air conditioning system for the new Oakland University Human Health Sciences Building utilizing variable refrigerant flow (VRF) heat pumps. A pair of dedicated outdoor air supply units will utilize a thermally regenerated desiccant dehumidification section. A large solar thermal system along with a natural gas backup boiler will provide the thermal regeneration energy.

  1. Heat Pump Water Heaters | Department of Energy

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

    Heat Pump Water Heaters Heat Pump Water Heaters The Department of Energy (DOE) develops standardized data templates for reporting the results of tests conducted in accordance with current DOE test procedures. Templates may be used by third-party laboratories under contract with DOE that conduct testing in support of ENERGY STAR® verification, DOE rulemakings, and enforcement of the federal energy conservation standards. Heat Pump Water Heaters -- v1.7 (350.5 KB) More Documents &

  2. Heat Pump Clothes Dryer | Department of Energy

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

    Clothes Dryer Heat Pump Clothes Dryer Schematics of a heat pump clothes dryer<br /> Credit: Oak Ridge National Lab Schematics of a heat pump clothes dryer Credit: Oak Ridge National Lab Lead Performer: Oak Ridge National Laboratory - Oak Ridge, TN Partner: GE Appliances - Louisville, KY DOE Funding: $1,000,000 Cost Share: Provided by CRADA partner Project Term: Oct. 2013 - Sept. 2016 Project Objective The central objective of this project is to design and develop a heat pump clothes dryer

  3. Marshfield Utilities - Heat Pump Rebate Program | Department...

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

    State Wisconsin Program Type Rebate Program Rebate Amount Ground Source Heat Pump: 150 Home Energy Audit: Free Summary Marshfield Utilities offers cash-back rewards for...

  4. Choosing and Installing Geothermal Heat Pumps | Department of...

    Energy Savers [EERE]

    When selecting and installing a geothermal heat pump, consider the heating and cooling ... Evaluating Your Site for a Geothermal Heat Pump Shallow ground temperatures are relatively ...

  5. Idaho Falls Power - Energy Efficient Heat Pump Loan Program ...

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

    customers for the purchase and installation of energy efficient heat pumps. The Heat Pump Program applies to heating or cooling in existing buildings. Ducted, ductless, and...

  6. Gas-fueled absorption heat pump

    SciTech Connect (OSTI)

    Florette, M.; Peuportier, B.

    1982-01-01

    To determine the feasibility of using an absorption heat pump for residential space heating, French investigators are studying both theoretically and experimentally, the performance of the absorption cycle in terms of its efficiency and suitability to space-heating conditions. A 10-kW pilot unit is supplying data on design criteria, heat-exchange fluid selection, and heat and mass balances.

  7. Air-Source Heat Pumps | Department of Energy

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

    Air-Source Heat Pumps Air-Source Heat Pumps April 23, 2015 - 3:35pm Addthis When properly installed, an air-source heat pump can deliver one-and-a-half to three times more heat...

  8. GEOTHERMAL HEAT PUMP GROUTING MATERIALS

    SciTech Connect (OSTI)

    ALLAN,M.

    1998-04-01

    The thermal conductivity of cementitious grouts has been investigated in order to determine suitability of these materials for grouting vertical boreholes used with geothermal heat pumps. The roles of mix variables such as water/cement ratio, sand/cement ratio and superplasticizer dosage were measured. The cement-sand grouts were also tested for rheological characteristics, bleeding, permeability, bond to HDPE pipe, shrinkage, coefficient of thermal expansion, exotherm, durability and environmental impact. This paper summarizes the thermal conductivity, permeability, bonding and exotherm data for selected cementitious grouts. The theoretical reduction in bore length that could be achieved with the BNL-developed cement-sand grouts is examined. Finally, the FY 98 research and field trials are discussed.

  9. Tips: Heat Pumps | Department of Energy

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

    A heat pump does double duty as a central air conditioner by collecting the heat inside your ... They can reduce energy use by 30%-60%, control humidity, are sturdy and reliable, and ...

  10. Ground Source Heat Pumps | Open Energy Information

    Open Energy Info (EERE)

    heating andor cooling system that takes advantage of the relatively constant year-round ground temperature to pump heat to or from the ground. Other definitions:Wikipedia Reegle...

  11. Absorption Heat Pumps | Department of Energy

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

    an ammonia-water absorption cycle to provide heating and cooling. As in a standard heat pump, the refrigerant (in this case, ammonia) is condensed in one coil to release its...

  12. Geothermal Heat Pump Basics | Department of Energy

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

    Geothermal Heat Pump Basics Geothermal Heat Pump Basics August 19, 2013 - 11:12am Addthis Text Version Geothermal heat pumps use the constant temperature of the earth as an exchange medium for heat. Although many parts of the country experience seasonal temperature extremes-from scorching heat in the summer to sub-zero cold in the winter-the ground a few feet below the earth's surface remains at a relatively constant temperature. Depending on the latitude, ground temperatures range from 45°F

  13. Frostless heat pump having thermal expansion valves

    DOE Patents [OSTI]

    Chen, Fang C.; Mei, Viung C.

    2002-10-22

    A heat pump system having an operable relationship for transferring heat between an exterior atmosphere and an interior atmosphere via a fluid refrigerant and further having a compressor, an interior heat exchanger, an exterior heat exchanger, a heat pump reversing valve, an accumulator, a thermal expansion valve having a remote sensing bulb disposed in heat transferable contact with the refrigerant piping section between said accumulator and said reversing valve, an outdoor temperature sensor, and a first means for heating said remote sensing bulb in response to said outdoor temperature sensor thereby opening said thermal expansion valve to raise suction pressure in order to mitigate defrosting of said exterior heat exchanger wherein said heat pump continues to operate in a heating mode.

  14. Guide to Geothermal Heat Pumps

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

    among the most effcient and comfortable heating and cooling technologies available because they use the earth's natural heat to provide heating, cooling, and often, water heating. ...

  15. Air-Source Heat Pumps | Department of Energy

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

    Heat & Cool » Heat Pump Systems » Air-Source Heat Pumps Air-Source Heat Pumps An air-source heat pump can provide efficient heating and cooling for your home. When properly installed, an air-source heat pump can deliver one-and-a-half to three times more heat energy to a home than the electrical energy it consumes. This is possible because a heat pump moves heat rather than converting it from a fuel like combustion heating systems do. Air-source heat pumps have been used for many years in

  16. Super Energy Saver Heat Pump - Energy Innovation Portal

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

    Find More Like This Return to Search Super Energy Saver Heat Pump Oak Ridge National ... and coupled them to residential heat pumps, inventing a super energy saver heat pump. ...

  17. The Market - Who Needs Heat Pump Water Heaters? (Journal Article...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: The Market - Who Needs Heat Pump Water Heaters? Citation Details In-Document Search Title: The Market - Who Needs Heat Pump Water Heaters? Heat pump water heaters ...

  18. Solid state radiative heat pump

    DOE Patents [OSTI]

    Berdahl, Paul H.

    1986-01-01

    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.

  19. Solid state radiative heat pump

    DOE Patents [OSTI]

    Berdahl, P.H.

    1984-09-28

    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.

  20. Heat and mass transfer considerations in advanced heat pump systems

    SciTech Connect (OSTI)

    Panchal, C.B.; Bell, K.J.

    1992-08-01

    Advanced heat-pump cycles are being investigated for various applications. However, the working media and associated thermal design aspects require new concepts for maintaining high thermal effectiveness and phase equilibrium for achieving maximum possible thermodynamic advantages. In the present study, the heat- and mass-transfer processes in two heat-pump systems -- those based on absorption processes, and those using refrigerant mixtures -- are analyzed. The major technical barriers for achieving the ideal performance predicted by thermodynamic analysis are identified. The analysis provides general guidelines for the development of heat- and mass-transfer equipment for advanced heat-pump systems.

  1. Heat and mass transfer considerations in advanced heat pump systems

    SciTech Connect (OSTI)

    Panchal, C.B.; Bell, K.J.

    1992-01-01

    Advanced heat-pump cycles are being investigated for various applications. However, the working media and associated thermal design aspects require new concepts for maintaining high thermal effectiveness and phase equilibrium for achieving maximum possible thermodynamic advantages. In the present study, the heat- and mass-transfer processes in two heat-pump systems -- those based on absorption processes, and those using refrigerant mixtures -- are analyzed. The major technical barriers for achieving the ideal performance predicted by thermodynamic analysis are identified. The analysis provides general guidelines for the development of heat- and mass-transfer equipment for advanced heat-pump systems.

  2. Heat pump with freeze-up prevention

    DOE Patents [OSTI]

    Ecker, Amir L.

    1981-01-01

    What is disclosed is a heat pump apparatus for conditioning a fluid characterized by a fluid handler and path for circulating the fluid in heat exchange relationship with a refrigerant fluid; at least two refrigerant heat exchangers, one for effecting heat exchange with the fluid and a second for effecting heat exchange between refrigerant and a heat exchange fluid and the ambient air; a compressor for efficiently compressing the refrigerant; at least one throttling valve for throttling liquid refrigerant; a refrigerant circuit; refrigerant; a source of heat exchange fluid; heat exchange fluid circulating device and heat exchange fluid circuit for circulating the heat exchange fluid in heat exchange relationship with the refrigerant; and valves or switches for selecting the heat exchangers and direction of flow of the refrigerant therethrough for selecting a particular mode of operation. The heat exchange fluid prevents freeze up of the second heat exchanger by keeping the temperature above the dew point; and, optionally, provides heat for efficient operation.

  3. Field Testing of Pre-Production Prototype Residential Heat Pump...

    Energy Savers [EERE]

    Field Testing of Pre-Production Prototype Residential Heat Pump Water Heaters Field Testing of Pre-Production Prototype Residential Heat Pump Water Heaters Provides and overview of ...

  4. TVA Partner Utilities- Energy Right Heat Pump Program

    Broader source: Energy.gov [DOE]

    The Tennessee Valley Authority (TVA) energy right Heat Pump Plan provides financing to promote the installation of high efficiency heat pumps in homes and small businesses. Installation,...

  5. List of Heat pumps Incentives | Open Energy Information

    Open Energy Info (EERE)

    Equipment Insulation Heat pumps Windows Ground Source Heat Pumps Yes Agricultural Energy Efficiency Program (New York) State Rebate Program New York Agricultural Agricultural...

  6. TVA Partner Utilities - Energy Right Heat Pump Program | Department...

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

    Type Loan Program Summary The Tennessee Valley Authority (TVA) energy right Heat Pump Plan provides financing to promote the installation of high efficiency heat pumps in...

  7. Develop Standard Method of Test for Integrated Heat Pump - 2013...

    Energy Savers [EERE]

    Develop Standard Method of Test for Integrated Heat Pump - 2013 Peer Review Develop Standard Method of Test for Integrated Heat Pump - 2013 Peer Review Emerging Technologies ...

  8. Finite Volume Based Computer Program for Ground Source Heat Pump...

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

    Finite Volume Based Computer Program for Ground Source Heat Pump Systems Finite Volume Based Computer Program for Ground Source Heat Pump Systems Project objective: Create a new ...

  9. Covered Product Category: Residential Heat Pump Water Heaters...

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

    Heat Pump Water Heaters Covered Product Category: Residential Heat Pump Water Heaters The Federal Energy Management Program (FEMP) provides acquisition guidance and Federal ...

  10. Illustrative Calculation of Economics for Heat Pump and "Grid...

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

    Illustrative Calculation of Economics for Heat Pump and "Grid-Enabled" Water Heaters Illustrative Calculation of Economics for Heat Pump and "Grid-Enabled" Water Heaters PDF icon ...

  11. Natural Refrigerant High-Performance Heat Pump for Commercial...

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

    Refrigerant High-Performance Heat Pump for Commercial Applications Natural Refrigerant High-Performance Heat Pump for Commercial Applications Credit: S-RAM Credit: S-RAM Lead ...

  12. Adsorption Heat Pump Water Heater | Department of Energy

    Energy Savers [EERE]

    Adsorption Heat Pump Water Heater Adsorption Heat Pump Water Heater Lead Performer: Oak Ridge National Laboratory - Oak Ridge, TN DOE Funding: 500,000 Project Term: Oct. 2013 - ...

  13. Purchasing Energy-Efficient Residential Air Source Heat Pumps...

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

    Air Source Heat Pumps Purchasing Energy-Efficient Residential Air Source Heat Pumps The Federal Energy Management Program (FEMP) provides acquisition guidance for residential air ...

  14. Absorption Heat Pump Water Heater - 2013 Peer Review | Department...

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

    Absorption Heat Pump Water Heater - 2013 Peer Review Absorption Heat Pump Water Heater - 2013 Peer Review Emerging Technologies Project for the 2013 Building Technologies Office's ...

  15. Ground Source Heat Pump Demonstration Projects | Department of...

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

    Ground Source Heat Pump Demonstration Projects Ground Source Heat Pump Demonstration Projects Below are the project presentations and respective peer review results for Ground ...

  16. Data Analysis from Ground Source Heat Pump Demonstration Projects...

    Energy Savers [EERE]

    Analysis from Ground Source Heat Pump Demonstration Projects Data Analysis from Ground Source Heat Pump Demonstration Projects Comparison of building energy use before and after ...

  17. Heat Pump Water Heater Using Solid-State Energy Converters

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

    Heat Pump Water Heater Using Solid-State Energy Converters 2015 Building Technologies ... Home Water Heaters with Affordable, Reliable Solid-State Heat Pumps Key Partners: ...

  18. Efficient Engine-Driven Heat Pump for the Residential Sector

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

    Efficient Engine-Driven Heat Pump for the Residential Sector Introduction Building on previous work on an 11-ton packaged natural gas heat pump, this project developed hardware and software for en- gine and system controls for a residential gas heat pump system that provides space cooling, heating, and hot water. Various electric heat pump systems are used to provide heating and cooling for a wide range of buildings, from commercial facilities to single family homes. The market for heat pumps is

  19. Edmond Electric- Residential Heat Pump Rebate Program

    Broader source: Energy.gov [DOE]

    Edmond Electric offers rebates to residential customers who install energy-efficient heat pumps. This program applies to installations in both new and existing residential homes and complexes. Air...

  20. Geothermal heat pumps for federal buildings

    SciTech Connect (OSTI)

    1999-09-02

    Geothermal heat pumps (GHPs) can provide significant energy savings to a wide range of Federal facilities. GHP equipment can be obtained and installed at no up-front cost through Energy Savings Performance Contracts (ESPCs) through energy service companies (ESCOs).

  1. Ground Source Heat Pump Subprogram Overview

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

    EGS Demonstration s, 51.4 Innovative Exploration Technologies, 98.1 Ground Source Heat Pumps, ... chiller, VAV air handling system, and gas-fired hot water boiler *54 GHP units, 200 ...

  2. Ground Source Heat Pumps | Open Energy Information

    Open Energy Info (EERE)

    efficient when cooling your home. Not only does this save energy and money, it reduces air pollution. GSHP System Ground source heat pump systems consist of three parts: the...

  3. Residential Air-Source Heat Pump Program

    Broader source: Energy.gov [DOE]

    Massachusetts offers rebates of up to $2,500 for the installation of high-efficiency, cold-climate air-source heat pumps (ASHPs) in residential buildings of one to four units. 

  4. Residential Cold Climate Heat Pump (CCHP)

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

    Residential Cold Climate Heat Pump (CCHP) 2014 Building Technologies Office Peer Review Craig Messmer, craig@unicosystem.com Unico, Inc. The Unico Story * FAMILY OWNED U.S. MANUFACTURING BUSINESS in St. Louis, Missouri. * Largest SDHV manufacturer in the world with over 200,000 SQUARE FEET OF MANUFACTURING space. * Partnering with the U.S. Department of Energy to develop the next generation of HIGHLY EFFICIENT AND COST-EFFECTIVE HVAC systems. 2 The Unico Cold Climate Heat Pump (CCHP) * In

  5. Geothermal Heat Pumps - Heating Mode | Department of Energy

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

    Heating Mode Geothermal Heat Pumps - Heating Mode In winter, fluid passing through this vertical, closed loop system is warmed by the heat of the earth; this heat is then transferred to the building. Heating Mode Animated Slide (PowerPoint 493 KB) Note: To view this animation in PowerPoint use 'Slide Show' mode. Simple illustration showing the transfer of heat from the ground to a building space to provide space heating. Simple illustration showing the transfer of heat from the ground to a

  6. Advanced Variable Speed Air-Source Integrated Heat Pump | Department...

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

    Pump Advanced Variable Speed Air-Source Integrated Heat Pump Advanced variable-speed Air Source Integrated Heat Pump prototype system and field test site near Knoxville, TN Credit: ...

  7. Cold Climates Heat Pump Design Optimization

    SciTech Connect (OSTI)

    Abdelaziz, Omar [ORNL] [ORNL; Shen, Bo [ORNL] [ORNL

    2012-01-01

    Heat pumps provide an efficient heating method; however they suffer from sever capacity and performance degradation at low ambient conditions. This has deterred market penetration in cold climates. There is a continuing effort to find an efficient air source cold climate heat pump that maintains acceptable capacity and performance at low ambient conditions. Systematic optimization techniques provide a reliable approach for the design of such systems. This paper presents a step-by-step approach for the design optimization of cold climate heat pumps. We first start by describing the optimization problem: objective function, constraints, and design space. Then we illustrate how to perform this design optimization using an open source publically available optimization toolbox. The response of the heat pump design was evaluated using a validated component based vapor compression model. This model was treated as a black box model within the optimization framework. Optimum designs for different system configurations are presented. These optimum results were further analyzed to understand the performance tradeoff and selection criteria. The paper ends with a discussion on the use of systematic optimization for the cold climate heat pump design.

  8. Heat pump system with selective space cooling

    DOE Patents [OSTI]

    Pendergrass, J.C.

    1997-05-13

    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.

  9. Heat pump system with selective space cooling

    DOE Patents [OSTI]

    Pendergrass, Joseph C.

    1997-01-01

    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.

  10. Indoor unit for electric heat pump

    DOE Patents [OSTI]

    Draper, R.; Lackey, R.S.; Fagan, T.J. Jr.; Veyo, S.E.; Humphrey, J.R.

    1984-05-22

    An indoor unit for an electric heat pump is provided in modular form including a refrigeration module, an air mover module, and a resistance heat package module, the refrigeration module including all of the indoor refrigerant circuit components including the compressor in a space adjacent the heat exchanger, the modules being adapted to be connected to air flow communication in several different ways as shown to accommodate placement of the unit in various orientations. 9 figs.

  11. Design manual. [High temperature heat pump for heat recovery system

    SciTech Connect (OSTI)

    Burch, T.E.; Chancellor, P.D.; Dyer, D.F.; Maples, G.

    1980-01-01

    The design and performance of a waste heat recovery system which utilizes a high temperature heat pump and which is intended for use in those industries incorporating indirect drying processes are described. It is estimated that use of this heat recovery system in the paper, pulp, and textile industries in the US could save 3.9 x 10/sup 14/ Btu/yr. Information is included on over all and component design for the heat pump system, comparison of prime movers for powering the compressor, control equipment, and system economics. (LCL)

  12. Heat Balance Study for Submersible Mixer Pump

    SciTech Connect (OSTI)

    Lee, S.Y.

    2003-07-21

    A transient heat balance model was developed to assess the impact of a Submersible Mixer Pump (SMP) on waste temperature during the process of waste mixing and removal for the Type-I SRS tanks. The model results will be mainly used to determine the SMP design impacts on the waste tank temperature during operations and to develop a specification for a new SMP design to replace existing long-shaft mixer pumps used during waste removal. The model will also be used to provide input to the operation planning. This planning will be used as input to pump run duration in order to maintain temperature requirements within the tank during SMP operation.

  13. Air-Source Heat Pump Basics | Department of Energy

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

    Basics Air-Source Heat Pump Basics August 19, 2013 - 11:03am Addthis Air-source heat pumps transfer heat between the inside of a building and the outside air. How Air-Source...

  14. Operating and Maintaining Your Heat Pump | Department of Energy

    Office of Environmental Management (EM)

    Like all heating and cooling systems, proper maintenance is key to efficient operation. ... Home Cooling Systems Home Heating Systems Heat Pump Systems Operation & Maintenance ...

  15. List of Geothermal Heat Pumps Incentives | Open Energy Information

    Open Energy Info (EERE)

    using Renewable Fuels Geothermal Electric Ground Source Heat Pumps Hydroelectric energy Hydrogen Landfill Gas Methanol Passive Solar Space Heat Photovoltaics Solar Space Heat...

  16. Energy 101: Geothermal Heat Pumps | Department of Energy

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

    Geothermal Heat Pumps Energy 101: Geothermal Heat Pumps Addthis Description An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe "loops" containing water. This edition of Energy 101 explores the benefits Geothermal and the science behind how it all comes together. Text Version Below is the text version for the Energy 101: Geothermal heat pumps

  17. Electric Adsorption Heat Pump for Electric Vehicles: Electric-Powered Adsorption Heat Pump for Electric Vehicles

    SciTech Connect (OSTI)

    2011-11-21

    HEATS Project: PNNL is developing a new class of advanced nanomaterial called an electrical metal organic framework (EMOF) for EV heating and cooling systems. The EMOF would function similar to a conventional heat pump, which circulates heat or cold to the cabin as needed. However, by directly controlling the EMOF's properties with electricity, the PNNL design is expected to use much less energy than traditional heating and cooling systems. The EMOF-based heat pumps would be light, compact, efficient, and run using virtually no moving parts.

  18. High Efficiency Cold Climate Heat Pump

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

    High Efficiency Cold Climate Heat Pump 2014 Building Technologies Office Peer Review Bo Shen, shenb@ornl.gov Oak Ridge National Laboratory High Efficiency Cold Climate Heat Pump -(CCHP) CRADA Project Summary Timeline: Start date: 01-Oct-2010 Planned end date: 30-Sep-2015 Key Milestones (single-stage) 1. Equipment modeling and EnergyPlus simulation report - March/2013 2. Lab prototype fabricated and installed - Dec/2013 3. Meet 77% capacity at-13°F vs. 47°F; COP=4.1 at 47°F - March/2014

  19. Advanced Variable Speed Air-Source Integrated Heat Pump 2013...

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

    Pump 2013 Peer Review Advanced Variable Speed Air-Source Integrated Heat Pump 2013 Peer Review Emerging Technologies Project for the 2013 Building Technologies Office's Program ...

  20. In the OSTI Collections: Heat Pumps | OSTI, US Dept of Energy...

    Office of Scientific and Technical Information (OSTI)

    Heat Pumps Heat-Pump Water Heaters Heat Pumps in Heating, Ventilation, and Air ... Two common uses of heat pumps are in water heaters and in heating and air-conditioning ...

  1. Building America Webinar: High Performance Space Conditioning Systems, Part

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

    I: Heating and Cooling with Mini-Splits in the Northeast | Department of Energy I: Heating and Cooling with Mini-Splits in the Northeast Building America Webinar: High Performance Space Conditioning Systems, Part I: Heating and Cooling with Mini-Splits in the Northeast This presentation, Heating and Cooling with Mini-Splits in the Northeast, was delivered by Kohta Ueno, Building Science Corporation. Kohta will discuss BSC's research on ductless heat pumps versus mini-splits being used in

  2. Submersible pumping system with heat transfer mechanism

    DOE Patents [OSTI]

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

    2014-04-15

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

  3. Multi-Function Gas Fired Heat Pump

    SciTech Connect (OSTI)

    Abu-Heiba, Ahmad; Vineyard, Edward Allan

    2015-11-30

    The aim of this project was to design a residential fuel fired heat pump and further improve efficiency in collaboration with an industry partner – Southwest Gas, the developer of the Nextaire commercial rooftop fuel-fired heat pump. Work started in late 2010. After extensive search for suitable engines, one manufactured by Marathon was selected. Several prototypes were designed and built over the following four years. Design changes were focused on lowering the cost of components and the cost of manufacturing. The design evolved to a final one that yielded the lowest cost. The final design also incorporates noise and vibration reduction measures that were verified to be effective through a customer survey. ETL certification is currently (as of November 2015) underway. Southwest Gas is currently in talks with GTI to reach an agreement through which GTI will assess the commercial viability and potential of the heat pump. Southwest Gas is searching for investors to manufacture the heat pump and introduce it to the market.

  4. Covered Product Category: Residential Geothermal Heat Pumps

    Broader source: Energy.gov [DOE]

    FEMP provides acquisition guidance across a variety of product categories, including geothermal heat pumps, which are an ENERGY STAR-qualified product category. Federal laws and requirements mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law.

  5. Purchasing Energy-Efficient Geothermal Heat Pumps

    Broader source: Energy.gov [DOE]

    FEMP provides acquisition guidance for geothermal heat pumps, a product category covered by ENERGY STAR. Federal laws and requirements mandate that agencies purchase ENERGY STAR-qualified products or FEMP-designated products in all product categories covered by these programs and in any acquisition actions that are not specifically exempted by law.

  6. Residential Variable-Capacity Heat Pumps Sized to Heating Loads

    SciTech Connect (OSTI)

    Munk, Jeffrey D.; Jackson, Roderick K.; Odukomaiya, Adewale; Gehl, Anthony C.

    2014-01-01

    Variable capacity heat pumps are an emerging technology offering significant energy savings potential and improved efficiency. With conventional single-speed systems, it is important to appropriately size heat pumps for the cooling load as over-sizing would result in cycling and insufficient latent capacity required for humidity control. These appropriately sized systems are often under-sized for the heating load and require inefficient supplemental electric resistance heat to meet the heating demand. Variable capacity heat pumps address these shortcomings by providing an opportunity to intentionally size systems for the dominant heating season load without adverse effects of cycling or insufficient dehumidification in the cooling season. This intentionally-sized system could result in significant energy savings in the heating season, as the need for inefficient supplemental electric resistance heat is drastically reduced. This is a continuation of a study evaluating the energy consumption of variable capacity heat pumps installed in two unoccupied research homes in Farragut, a suburb of Knoxville, Tennessee. In this particular study, space conditioning systems are intentionally sized for the heating season loads to provide an opportunity to understand and evaluate the impact this would have on electric resistance heat use and dehumidification. The results and conclusions drawn through this research are valid and specific for portions of the Southeastern and Midwestern United States falling in the mixed-humid climate zone. While other regions in the U.S. do not experience this type of climate, this work provides a basis for, and can help understand the implications of other climate zones on residential space conditioning energy consumption. The data presented here will provide a framework for fine tuning residential building EnergyPlus models that are being developed.

  7. Air-Source Heat Pump Basics | Department of Energy

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

    Air-Source Heat Pump Basics Air-Source Heat Pump Basics August 19, 2013 - 11:03am Addthis Air-source heat pumps transfer heat between the inside of a building and the outside air. How Air-Source Heat Pumps Work This diagram of a split-system heat pump heating cycle shows refrigerant circulating through a closed loop that passes through the wall of a house. Inside the house the refrigerant winds through indoor coils, with a fan blowing across them, and outside the house is another fan and another

  8. Solar-powered turbocompressor heat pump system

    DOE Patents [OSTI]

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

    1982-08-12

    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.

  9. Indoor unit for electric heat pump

    DOE Patents [OSTI]

    Draper, Robert; Lackey, Robert S.; Fagan, Jr., Thomas J.; Veyo, Stephen E.; Humphrey, Joseph R.

    1984-01-01

    An indoor unit for an electric heat pump is provided in modular form including a refrigeration module 10, an air mover module 12, and a resistance heat package module 14, the refrigeration module including all of the indoor refrigerant circuit components including the compressor 36 in a space adjacent the heat exchanger 28, the modules being adapted to be connected to air flow communication in several different ways as shown in FIGS. 4-7 to accommodate placement of the unit in various orientations.

  10. DOE Webinar - Residential Geothermal Heat Pump Retrofits (Presentation)

    SciTech Connect (OSTI)

    Anderson, E. R.

    2010-12-14

    This presentation was given December 14, 2010, as part of DOE's Webinar series. The presentation discusses geothermal heat pump retrofits, technology options, and an overview of geothermal energy and geothermal heat pumps.

  11. Efficient Engine-Driven Heat Pump for the Residential Sector

    Office of Energy Efficiency and Renewable Energy (EERE)

    Building on previous work on an 11-ton packaged natural gas heat pump, this project will develop hardware and software for engine and system controls for a residential gas heat pump system that...

  12. Red River Valley REA- Heat Pump Loan Program

    Broader source: Energy.gov [DOE]

    The Red River Valley Rural Electric Association (RRVREA) offers a loan program to its members for air-source and geothermal heat pumps. Loans are available for geothermal heat pumps at a 5% fixed...

  13. Rock Hill Utilities- Water Heater and Heat Pump Rebate Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    Through the SmartChoice program, Rock Hill Utilities offers rebates for water heater and heat pump replacements. Information on financing for heat pumps can also be found on the web site listed...

  14. Hydroxide absorption heat pumps with spray absorber

    SciTech Connect (OSTI)

    Summerer, F.; Alefeld, G.; Zeigler, F.; Riesch, P.

    1996-11-01

    The absorber is one of the most expensive components of an absorption heat pump or chiller, respectively. In order to reduce the cost of a heat exchanger, much effort is invested into searching for additives for heat transfer enhancement. Another way to reduce heat exchanger cost, especially for machines with low capacities, is to use an adiabatic spray absorber. The basic principles of the spray absorber is to perform heat and mass transfer separated from each other in two different components. In this way the heat can be rejected effectively in a liquid-liquid heat exchanger, whereas the mass transfer occurs subsequently in a simple vessel. The spray technique can not only save heat exchanger cost in conventional absorption systems working with water and lithium bromide, it also allows the use of quite different working fluids such as hydroxides, which have lower heat transfer coefficients in falling films. Moreover, the separated heat transfer can easily be performed in a liquid-to-air heat exchanger. Hence it is obvious to use hydroxides that allow for a high temperature lift for building an air-cooled chiller with spray absorber. In this presentation theoretical and experimental investigations of the spray absorber as well as the setup will be described. Finally, possible applications will be outlined.

  15. NREL Evaluates Performance of Heat Pump Water Heaters (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-02-01

    NREL evaluates energy savings potential of heat pump water heaters in homes throughout all U.S. climate zones.

  16. FIELD TEST AND EVALUATION OF RESIDENTIAL GROUND SOURCE HEAT PUMP...

    Office of Scientific and Technical Information (OSTI)

    TEST AND EVALUATION OF RESIDENTIAL GROUND SOURCE HEAT PUMP SYSTEMS USING ALTERNATIVE VERTICAL-BORE GROUND HEAT EXCHANGERS Citation Details In-Document Search Title: FIELD TEST AND ...

  17. Regional Variation in Residential Heat Pump Water Heater Performance...

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

    Performance of Water Heating Systems Building America Technology Solutions for New and Existing Homes: Performance of a Heat Pump Water Heater in the Hot-Humid Climate, ...

  18. TVA Partner Utilities - Energy Right Heat Pump Program | Department...

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

    Carolina Program Type Loan Program Summary The Tennessee Valley Authority (TVA) energy right Heat Pump Plan provides financing to promote the installation of high efficiency heat...

  19. TVA Partner Utilities - Energy Right Heat Pump Program | Department...

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

    Kentucky Program Type Loan Program Summary The Tennessee Valley Authority (TVA) energy right Heat Pump Plan provides financing to promote the installation of high efficiency heat...

  20. TVA Partner Utilities - Energy Right Heat Pump Program | Department...

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

    Program Type Loan Program Summary The Tennessee Valley Authority (TVA) energy right Heat Pump Plan provides financing to promote the installation of high efficiency heat...

  1. TVA Partner Utilities - Energy Right Heat Pump Program | Department...

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

    Virginia Program Type Loan Program Summary The Tennessee Valley Authority (TVA) energy right Heat Pump Plan provides financing to promote the installation of high efficiency heat...

  2. TVA Partner Utilities - Energy Right Heat Pump Program | Department...

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

    Alabama Program Type Loan Program Summary The Tennessee Valley Authority (TVA) energy right Heat Pump Plan provides financing to promote the installation of high efficiency heat...

  3. Residential Multi-Function Gas Heat Pump: Efficient Engine-Driven Heat Pump for the Residential Sector- Fact Sheet, 2016

    Office of Energy Efficiency and Renewable Energy (EERE)

    Fact sheet overview of a natural gas heat pump system for the residential sector that will incorporate an internal combustion engine that drives a vapor-compression heat pump

  4. Refrigerant charge management in a heat pump water heater

    SciTech Connect (OSTI)

    Chen, Jie; Hampton, Justin W.

    2014-06-24

    Heat pumps that heat or cool a space and that also heat water, refrigerant management systems for such heat pumps, methods of managing refrigerant charge, and methods for heating and cooling a space and heating water. Various embodiments deliver refrigerant gas to a heat exchanger that is not needed for transferring heat, drive liquid refrigerant out of that heat exchanger, isolate that heat exchanger against additional refrigerant flowing into it, and operate the heat pump while the heat exchanger is isolated. The heat exchanger can be isolated by closing an electronic expansion valve, actuating a refrigerant management valve, or both. Refrigerant charge can be controlled or adjusted by controlling how much liquid refrigerant is driven from the heat exchanger, by letting refrigerant back into the heat exchanger, or both. Heat pumps can be operated in different modes of operation, and segments of refrigerant conduit can be interconnected with various components.

  5. Heat pump assisted geothermal heating system for Felix Spa, Romania

    SciTech Connect (OSTI)

    Rosca, Marcel; Maghiar, Teodor

    1996-01-24

    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.

  6. Heat pump assisted geothermal heating system for Felix Spa, Romania

    SciTech Connect (OSTI)

    Rosca, M.; Maghiar, T.

    1996-12-31

    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.

  7. Field Monitoring Protocol: Heat Pump Water Heaters

    SciTech Connect (OSTI)

    Sparn, B.; Earle, L.; Christensen, D.; Maguire, J.; Wilson, E.; Hancock, E.

    2013-02-01

    This document provides a standard field monitoring protocol for evaluating the installed performance of Heat Pump Water Heaters in residential buildings. The report is organized to be consistent with the chronology of field test planning and execution. Research questions are identified first, followed by a discussion of analysis methods, and then the details of measuring the required information are laid out. A field validation of the protocol at a house near the NREL campus is included for reference.

  8. Innovative Miniaturized Heat Pumps for Buildings: Modular Thermal Hub for Building Heating, Cooling and Water Heating

    SciTech Connect (OSTI)

    2010-09-01

    BEETIT Project: Georgia Tech is using innovative components and system design to develop a new type of absorption heat pump. Georgia Tech’s new heat pumps are energy efficient, use refrigerants that do not emit greenhouse gases, and can run on energy from combustion, waste heat, or solar energy. Georgia Tech is leveraging enhancements to heat and mass transfer technology possible in microscale passages and removing hurdles to the use of heat-activated heat pumps that have existed for more than a century. Use of microscale passages allows for miniaturization of systems that can be packed as monolithic full-system packages or discrete, distributed components enabling integration into a variety of residential and commercial buildings. Compared to conventional heat pumps, Georgia Tech’s design innovations will create an absorption heat pump that is much smaller, has higher energy efficiency, and can also be mass produced at a lower cost and assembly time.

  9. Solar heat pump systems with refrigerant-filled collectors

    SciTech Connect (OSTI)

    O'Dell, M.P.; Beckman, W.A.; Mitchell, J.W.

    1983-01-01

    The heat pump system with a refrigerant-filled evaporator consists of a standard air-to-air or air-to-liquid heat pump that utilizes a solar panel as the evaporator. A combination of solar energy and convection heat transfer acts as the ''free'' energy absorbed by the collector/evaporator. In this paper, the seasonal performance of such systems for industrial applications will be presented. Performance of collector/evaporator heat pumps will be compared with alternative heat pump and solar systems. The benefits of covered and coverless collector/evaporators will be discussed. Results to date have shown that refrigerant-filled collector heat pumps do not perform as well as conventional heat pumps at small collector areas but have as much as 15% performance improvement over conventional heat pumps at an appropriate collector area.

  10. High Efficiency Cold Climate Heat Pump

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

    Cold Climate Heat Pump 2016 Building Technologies Office Peer Review Bo Shen, shenb@ornl.gov Oak Ridge National Laboratory 2 Project Summary Timeline: Start date: 01-Oct-2010 Planned end date: May-Sep-2017 Key Milestones 1. Tandem fixed-speed system: Meet 76% capacity at-13°F vs. 47°F; COP=4.2 at 47°F - March/2014. 2. Tandem vapor injection system: Meet 88% capacity at-13°F vs. 47°F; COP=4.4 at 47°F - June/2015. 3. Field investigation of a prototype CCHP: eliminate auxiliary heat down to

  11. Measured Performance of a Low Temperature Air Source Heat Pump

    SciTech Connect (OSTI)

    R.K. Johnson

    2013-09-01

    A 4-ton Low Temperature Heat Pump (LTHP) manufactured by Hallowell International was installed in a residence near New Haven, Connecticut and monitored over two winters of operation. After attending to some significant service issues, the heat pump operated as designed. This report should be considered a review of the dual compressor “boosted heat pump” technology. The Low Temperature Heat Pump system operates with four increasing levels of capacity (heat output) as the outdoor temperature drops.

  12. High temperature absorption heat pump for industrial usage

    SciTech Connect (OSTI)

    Bugarel, R.; Morillon, R.

    1982-01-01

    A theoretical and experimental study has demonstrated that an absorption heat pump with a water-lithium bromide thermodynamic couple has a practical coefficient of performance of 1.4-1.6 when providing a 280/sup 0/F heat source. The ability to serve as a high-temperature heat source makes this heat pump suitable for certain industrial processes such as drying.

  13. Cold Climate Heat Pumps Using Tandem Compressors

    SciTech Connect (OSTI)

    Shen, Bo; Abdelaziz, Omar; Rice, C Keith; Baxter, Van D

    2016-01-01

    In cold climate zones, e.g. ASHRAE climate regions IV and V, conventional electric air-source heat pumps (ASHP) do not work well, due to high compressor discharge temperatures, large pressure ratios and inadequate heating capacities at low ambient temperatures. Consequently, significant use of auxiliary strip heating is required to meet the building heating load. We introduce innovative ASHP technologies as part of continuing efforts to eliminate auxiliary strip heat use and maximize heating COP with acceptable cost-effectiveness and reliability. These innovative ASHP were developed using tandem compressors, which are capable of augmenting heating capacity at low temperatures and maintain superior part-load operation efficiency at moderate temperatures. Two options of tandem compressors were studied; the first employs two identical, single-speed compressors, and the second employs two identical, vapor-injection compressors. The investigations were based on system modeling and laboratory evaluation. Both designs have successfully met the performance criteria. Laboratory evaluation showed that the tandem, single-speed compressor ASHP system is able to achieve heating COP = 4.2 at 47 F (8.3 C), COP = 2.9 at 17 F (-8.3 C), and 76% rated capacity and COP = 1.9 at -13 F (-25 C). This yields a HSPF = 11.0 (per AHRI 210/240). The tandem, vapor-injection ASHP is able to reach heating COP = 4.4 at 47 F, COP = 3.1 at 17 F, and 88% rated capacity and COP = 2.0 at -13 F. This yields a HSPF = 12.0. The system modeling and further laboratory evaluation are presented in the paper.

  14. Tennessee: Ground-Source Heat Pump Receives Innovation Award...

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

    The new Trilogy 40 Q-Mode(tm) series, a highly efficient ground-source heat pump that has the capability of providing all the space heating, cooling, and water heating requirements ...

  15. CO2 Heat Pump Water Heater

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

    CO 2 Heat Pump Water Heater 2016 Building Technologies Office Peer Review Kyle Gluesenkamp, gluesenkampk@ornl.gov Oak Ridge National Laboratory Evaporator 2 Project Summary Timeline: Start date: Oct 1, 2009 Planned end date: Sep 30, 2016 Key Milestones 1. Go/No-Go: Price premium <$750 compared to baseline HFC HPWH; FY15Q2 (MET) 2. Go/No-Go: EF>2.0 and FHR>50 gallon to meet ENERGY STAR qualification criteria; FY14Q4 (MET) Budget: Total DOE to Date: $2,367k Total Project: $2,435k Key

  16. Refrigerant charge management in a heat pump water heater

    DOE Patents [OSTI]

    Chen, Jie; Hampton, Justin W.

    2016-07-05

    Heat pumps that heat or cool a space and that also heat water, refrigerant management systems for such heat pumps, and methods of managing refrigerant charge. Various embodiments remove idle refrigerant from a heat exchanger that is not needed for transferring heat by opening a refrigerant recovery valve and delivering the idle refrigerant from the heat exchanger to an inlet port on the compressor. The heat exchanger can be isolated by closing an electronic expansion valve, actuating a refrigerant management valve, or both. Refrigerant charge can be controlled by controlling how much refrigerant is drawn from the heat exchanger, by letting some refrigerant back into the heat exchanger, or both. Heat pumps can be operated in different modes of operation, and various components can be interconnected with refrigerant conduit. Some embodiments deliver refrigerant gas to the heat exchanger and drive liquid refrigerant out prior to isolating the heat exchanger.

  17. Heat Pump Clothes Dryer Model Development

    SciTech Connect (OSTI)

    Shen, Bo

    2016-01-01

    A heat pump clothes dryer (HPCD) is an innovative appliance that uses a vapor compression system to dry clothes. Air circulates in a closed loop through the drum, so no vent is required. The condenser heats air to evaporate moisture out of the clothes, and the evaporator condenses water out of the air stream. As a result, the HPCD can achieve 50% energy savings compared to a conventional electric resistance dryer. We developed a physics-based, quasi-steady-state HPCD system model with detailed heat exchanger and compressor models. In a novel approach, we applied a heat and mass transfer effectiveness model to simulate the drying process of the clothes load in the drum. The system model is able to simulate the inherently transient HPCD drying process, to size components, and to reveal trends in key variables (e.g. compressor discharge temperature, power consumption, required drying time, etc.) The system model was calibrated using experimental data on a prototype HPCD. In the paper, the modeling method is introduced, and the model predictions are compared with experimental data measured on a prototype HPCD.

  18. Monitoring SERC Technologies -Geothermal/Ground Source Heat Pumps |

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

    Department of Energy Monitoring SERC Technologies -Geothermal/Ground Source Heat Pumps Monitoring SERC Technologies -Geothermal/Ground Source Heat Pumps On Nov. 3, 2011, Dave Peterson, a Project Leader at the National Renewable Energy Laboratory, presented a Webinar about Geothermal/Ground Source Heat Pumps and how to properly monitor their installation. View the webinar presentation or read the transcript. More Information Some resources and tools mentioned in the presentation include: U.S.

  19. DOE Webinar … Residential Geothermal Heat Pump Retrofits (Presentation) |

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

    Department of Energy Webinar … Residential Geothermal Heat Pump Retrofits (Presentation) DOE Webinar … Residential Geothermal Heat Pump Retrofits (Presentation) Presented at the U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy (EERE) Webinar Series on Dec. 14, 2010. DOE Webinar- Residential Geothermal Heat Pump Retrofits (Presentation) (3.94 MB) More Documents & Publications Sustainable Energy Resources for Consumers (SERC) - Geothermal/Ground-Source

  20. What's New in Geothermal Heat Pumps | Department of Energy

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

    What's New in Geothermal Heat Pumps What's New in Geothermal Heat Pumps This workshop was held on May 12, 2009, in Las Vegas, Nevada, at the Connect '09 Conference & Expo, the annual national conference for electric cooperative marketing, communication, and member service professionals. The workshop focused on how geothermal heat pump systems can meet the energy goals of electric cooperatives while building system load factor and revenue. The presentations included information about

  1. Commercial Absorption Heat Pump Water Heater | Department of Energy

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

    Absorption Heat Pump Water Heater Commercial Absorption Heat Pump Water Heater Credit: Oak Ridge National Laboratory Credit: Oak Ridge National Laboratory Lead Performer: Oak Ridge National Laboratory - Oak Ridge, TN Partner: A.O. Smith Inc. - Milwaukee, WI DOE Funding: $2,000,000 Cost Share: Provided by CRADA partners Project Term: October 1, 2013 - September 30, 2016 Project Objective The objective of this project is to develop a gas-fired absorption heat pump water heater for the commercial

  2. Purchasing Energy-Efficient Geothermal Heat Pumps | Department of Energy

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

    Geothermal Heat Pumps Purchasing Energy-Efficient Geothermal Heat Pumps The Federal Energy Management Program (FEMP) provides acquisition guidance for geothermal heat pumps, a product category covered by ENERGY STAR. Federal laws and requirements mandate that agencies purchase ENERGY STAR-qualified products or FEMP-designated products in all product categories covered by these programs and in any acquisition actions that are not specifically exempted by law. FEMP's acquisition guidance and

  3. Geothermal Heat Pumps: Market Status, Barriers to Adoption, and...

    Open Energy Info (EERE)

    search Tool Summary LAUNCH TOOL Name: Geothermal Heat Pumps: Market Status, Barriers to Adoption, and Actions to Overcome Barriers AgencyCompany Organization: Oak Ridge...

  4. Estimated Maintenance Cost Savings from a Geothermal Heat Pump...

    Office of Scientific and Technical Information (OSTI)

    Contract at Fort Polk, LA Citation Details In-Document Search Title: Estimated Maintenance Cost Savings from a Geothermal Heat Pump Energy Savings Performance Contract at ...

  5. NREL Develops Heat Pump Water Heater Simulation Model (Fact Sheet)

    SciTech Connect (OSTI)

    Hudon, K.

    2012-05-01

    A new simulation model helps researchers evaluate real-world impacts of heat pump water heaters in U.S. homes.

  6. Covered Product Category: Residential Air-Source Heat Pumps

    Broader source: Energy.gov [DOE]

    The Federal Energy Management Program (FEMP) provides acquisition guidance for residential air-source heat pumps, which is an ENERGY STAR qualified product category.

  7. Research and Development Roadmap. Geothermal (Ground-Source) Heat Pumps

    SciTech Connect (OSTI)

    Goetzler, William; Guernsey, Matt; Kar, Rahul

    2012-10-01

    Roadmap identifying potential activities and technical innovations that may enable substantial improvements in residential and commercial Geothermal Heat Pumps (GHP) installed cost and/or efficiency.

  8. Oklahoma Municipal Power Authority - Geothermal Heat Pump Rebate...

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

    < Back Eligibility Commercial Industrial Residential Agricultural Savings Category Geothermal Heat Pumps Commercial Refrigeration Equipment Maximum Rebate 1,000ton Program Info...

  9. Operating and Maintaining Your Heat Pump | Department of Energy

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

    Changing filters regularly is an important part of maintaining a heat pump system. | Photo courtesy of iStockphotoBanksPhotos Changing filters regularly is an important part...

  10. Hybrid Geothermal Heat Pump System Research Geothermal Project...

    Open Energy Info (EERE)

    are an innovation that has the potential to dramatically decrease this high first cost. HyGSHPs connect conventional ground-source heat pump (GSHP) equipment with...

  11. Purchasing Energy-Efficient Residential Air Source Heat Pumps

    Broader source: Energy.gov [DOE]

    The Federal Energy Management Program (FEMP) provides acquisition guidance for residential air-source heat pumps, which is an ENERGY STAR qualified product category.

  12. High-Efficiency Solid-State Heat Pump Module

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

    Solid-State Heat Pump Module 2016 Building Technologies Office Peer Review Dr. S. Ravi ... and Collaborators: None Communications: Project is in early stages of ...

  13. Energy 101: Geothermal Heat Pumps | Department of Energy

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

    their search is a geothermal heat pump, an increasingly popular energy technology that can help decrease energy costs while reducing their carbon footprint. The way it works is ...

  14. NREL Evaluates Performance of Heat Pump Water Heaters (Fact Sheet...

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

    Heat Pump Water Heater Technology Assessment Based on Laboratory Research and Energy Simulation Models. 2012 ASHRAE Winter Conference, Chicago, IL, January 21-25, 2012. NREL Report ...

  15. NREL Develops Heat Pump Water Heater Simulation Model (Fact Sheet...

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

    Heat Pump Water Heater Technology Assessment Based on Laboratory Research and Energy Simulation Models. ASHRAE Transactions 2012, Vol. 118, Part 1. www.nrel.govdocsfy12osti...

  16. DOE Science Showcase - Heat Pump Research | OSTI, US Dept of...

    Office of Scientific and Technical Information (OSTI)

    This heat pump research information has been made available to DOE's Office of Scientific and Technical Information for inclusion in OSTI's free web-based resources. Image Credit: ...

  17. DOE Webinar … Residential Geothermal Heat Pump Retrofits (Presentatio...

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

    Sustainable Energy Resources for Consumers (SERC) - GeothermalGround-Source Heat Pumps Measuring the Costs and Economic, Social, and Environmental Benefits of Nationwide ...

  18. Heat Pump Water Heaters: Controlled Field Research of Impact...

    Office of Scientific and Technical Information (OSTI)

    Water Heaters: Controlled Field Research of Impact on Space Conditioning and Demand Response Characteristics Citation Details In-Document Search Title: Heat Pump Water Heaters: ...

  19. The Natural Gas Heat Pump and Air Conditioner

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

    Natural Gas Heat Pump and Air Conditioner 2016 Building Technologies Office Peer Review ... Gas Technology Institute to optimize integration of NOx-free radiation burner. * Testing ...

  20. The Natural gas Heat Pump and Air Conditioner

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

    The Natural Gas Heat Pump and Air Conditioner 2015 Building Technologies Office Peer ... Summit - Best Presenter Project Integration and Collaboration Project Integration: ...

  1. Residential Absorption Heat Pump Water Heater | Department of...

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

    Oak Ridge National Laboratory (ORNL) is developing and promoting the market introduction of a residential absorption heat pump water heater that would use 40% less energy annually ...

  2. Heat Pump Water Heater Using Solid-State Energy Converters

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

    Heat Pump Water Heater Using Solid-State Energy Converters 2016 Building Technologies ... Project Goal: Demonstrate a home water heater product with affordable and reliable ...

  3. Ground-source Heat Pumps Applied to Commercial Buildings

    SciTech Connect (OSTI)

    Parker, Steven A.; Hadley, Donald L.

    2009-07-14

    Ground-source heat pumps can provide an energy-efficient, cost-effective way to heat and cool commercial facilities. While ground-source heat pumps are well established in the residential sector, their application in larger, commercial-style, facilities is lagging, in part because of a lack of experience with the technology by those in decision-making positions. Through the use of a ground-coupling system, a conventional water-source heat pump design is transformed to a unique means of utilizing thermodynamic properties of earth and groundwater for efficient operation throughout the year in most climates. In essence, the ground (or groundwater) serves as a heat source during winter operation and a heat sink for summer cooling. Many varieties in design are available, so the technology can be adapted to almost any site. Ground-source heat pump systems can be used widely in commercial-building applications and, with proper installation, offer great potential for the commercial sector, where increased efficiency and reduced heating and cooling costs are important. Ground-source heat pump systems require less refrigerant than conventional air-source heat pumps or air-conditioning systems, with the exception of direct-expansion-type ground-source heat pump systems. This chapter provides information and procedures that an energy manager can use to evaluate most ground-source heat pump applications. Ground-source heat pump operation, system types, design variations, energy savings, and other benefits are explained. Guidelines are provided for appropriate application and installation. Two case studies are presented to give the reader a sense of the actual costs and energy savings. A list of manufacturers and references for further reading are included for prospective users who have specific or highly technical questions not fully addressed in this chapter. Sample case spreadsheets are provided in Appendix A. Additional appendixes provide other information on the ground

  4. Energy Cost Calculator for Commercial Heat Pumps (5.4 >=< 20...

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

    Calculate Reset OUTPUT SECTION Performance per Heat Pump Your Choice Existing Heat Pump Base Model FEMP Recommended Level Best Available Cooling Efficiency EER Heating Efficiency ...

  5. Miniature heat pumps for portable and distributed space conditioning applications

    SciTech Connect (OSTI)

    Drost, M.K.; Friedrich, M.

    1997-12-31

    The Pacific Northwest National Laboratory (PNNL) is developing a miniature absorption heat pump for a range of microclimate control applications, including manportable cooling and distributed space conditioning. The miniature absorption heat pump will be sized to provide 350 W cooling, will have dimensions of 9 cm x 9 cm x 6 cm, and will weigh approximately 0.65 kg. Compared to a macroscale absorption heat pump, this represents reduction in volume by a factor of 60. A complete manportable cooling system including the heat pump, an air-cooled heat exchanger, batteries, and fuel is estimated to weight between 4 and 5 kg, compared to the 10 kg weight of alternative systems. Size and weight reductions are obtained by developing a device that can simultaneously take advantage of the high heat and mass transfer rates attainable in microscale structures while being large enough to allow electric powered pumping.

  6. Building America Case Studies for Existing Homes: Supplemental Ductless

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

    Mini-Split Heat Pump in the Hot-Humid Climate | Department of Energy Supplemental Ductless Mini-Split Heat Pump in the Hot-Humid Climate Building America Case Studies for Existing Homes: Supplemental Ductless Mini-Split Heat Pump in the Hot-Humid Climate The Building America Partnership for Improved Residential Construction team that studied the effects of mini-split heat pumps in six central Florida homes. Supplemental Ductless Mini-Split Heat Pump in the Hot-Humid Climate (694.94 KB) More

  7. Efficient Engine-Driven Heat Pump for the Residential Sector

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

    The market for heat pumps is signifcant. According to the U.S. Energy Information Administration's 2009 Residential Energy Consumption Survey, 9.8 million American homes are heated ...

  8. Choosing and Installing Geothermal Heat Pumps | Department of...

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

    translates into a GHP using one unit of electricity to move three units of heat from the earth. According to the EPA, geothermal heat pumps can reduce energy consumption -- and...

  9. Air-Source Heat Pumps | Department of Energy

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

    When properly installed, an air-source heat pump can deliver one-and-a-half to three times more heat energy to a home than the electrical energy it consumes. | Photo courtesy of...

  10. Building America Webinar: New Construction Hybrid-Ductless Heat Pumps

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

    Study: Resistance is Futile | Department of Energy New Construction Hybrid-Ductless Heat Pumps Study: Resistance is Futile Building America Webinar: New Construction Hybrid-Ductless Heat Pumps Study: Resistance is Futile This webinar will focus on the use of ductless heat pumps (DHP) as a hybrid "all-electric" heating system in new high-performance homes. In a DHP/hybrid heating system, the DHP fan coil is located in the main living area in combination with electric resistance zone

  11. Building America Webinar: New Construction Hybrid-Ductless Heat Pumps

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

    Study: Resistance is Futile | Department of Energy New Construction Hybrid-Ductless Heat Pumps Study: Resistance is Futile Building America Webinar: New Construction Hybrid-Ductless Heat Pumps Study: Resistance is Futile This webinar on June 24, 2015, focused on the use of ductless heat pumps (DHP) as a hybrid "all-electric" heating system in new high-performance homes. In a DHP/hybrid heating system, the DHP fan coil is located in the main living area in combination with electric

  12. Renewable energy technologies for federal facilities: Geothermal heat pump

    SciTech Connect (OSTI)

    1996-05-01

    This sheet summarizes information on geothermal heat pumps (GHPs), which extracts heat from the ground in the winter and transfers heat to the ground in the summer. More than 200,000 GHPs are operating in US; they can reduce energy consumption and related emissions by 23 to 44% compared to air-source heat pumps. Opportunities for use of GHPs, requirements, and cost are described. Important terms are defined.

  13. Choosing and Installing Geothermal Heat Pumps | Department of Energy

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

    and Installing Geothermal Heat Pumps Choosing and Installing Geothermal Heat Pumps These geothermal heating and cooling units installed in the basement of a new home are tied to a complex array of underground coils to keep indoor temperatures comfortable. | Photo courtesy of ©iStockphoto/BanksPhotos These geothermal heating and cooling units installed in the basement of a new home are tied to a complex array of underground coils to keep indoor temperatures comfortable. | Photo courtesy of

  14. Supercharger for Heat Pumps in Cold Climates | Department of Energy

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

    Supercharger for Heat Pumps in Cold Climates Supercharger for Heat Pumps in Cold Climates Emerging Technologies Project for the 2013 Building Technologies Office's Program Peer Review emrgtech15_walter_040313.pdf (1.48 MB) More Documents & Publications Thermoelectrics: The New Green Automotive Technology Next Generation Rooftop Unit - 2013 Peer Review Vehicular Thermoelectrics: The New Green Technology

  15. Corrosion protection of steel in ammonia/water heat pumps

    DOE Patents [OSTI]

    Mansfeld, Florian B.; Sun, Zhaoli

    2003-10-14

    Corrosion of steel surfaces in a heat pump is inhibited by adding a rare earth metal salt to the heat pump's ammonia/water working fluid. In preferred embodiments, the rare earth metal salt includes cerium, and the steel surfaces are cerated to enhance the corrosion-inhibiting effects.

  16. Heat Pump Water Heater Basics | Department of Energy

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

    Water Heating » Heat Pump Water Heater Basics Heat Pump Water Heater Basics August 19, 2013 - 2:59pm Addthis Illustration of a heat pump water heater, which looks like a tall cylinder with a small chamber on top and a larger one on the bottom. In the top chamber are a fan, a cylindrical compressor, and an evaporator that runs along the inside of the chamber. Jutting out from the exterior of the bottom chamber is a temperature and pressure relief valve. This valve has a tube called a hot water

  17. Alternative Refrigerant Evaluation for High-Ambient Temperature Environments: R-22 and R-410A Alternatives for Mini-Split Air Conditioners

    SciTech Connect (OSTI)

    Abdelaziz, Omar; Munk, Jeffrey D.; Shrestha, Som S.; Linkous, Randall Lee; Goetzler, William; Guernsey, Matt; Kassuga, Theo

    2015-08-01

    The Oak Ridge National Laboratory (ORNL) High-Ambient Temperature Testing Program for Low-GWP Refrigerants aims to develop an understanding of the performance of low-Global Warming Potential (low-GWP) alternatives to Hydrochlorofluorocarbon (HCFC) and Hydrofluorocarbon (HFC) refrigerants in mini-split air conditioners under high ambient temperature conditions. This interim working paper describes the parties involved, the alternative refrigerants selection process, the test procedures, and the preliminary results.

  18. Alternative Refrigerant Evaluation for High-Ambient-Temperature Environments: R-22 and R-410A Alternatives for Mini-Split Air Conditioners

    SciTech Connect (OSTI)

    Abdelaziz, Omar; Shrestha, Som S.; Munk, Jeffrey D.; Linkous, Randall Lee; Goetzler, William; Guernsey, Matt; Kassuga, Theo

    2015-10-01

    The Oak Ridge National Laboratory (ORNL) High-Ambient-Temperature Evaluation Program for low– global warming potential (Low-GWP) Refrigerants aims to develop an understanding of the performance of low-GWP alternative refrigerants to hydrochlorofluorocarbon (HCFC) and hydrofluorocarbon (HFC) refrigerants in mini-split air conditioners under high-ambient-temperature conditions. This final report describes the parties involved, the alternative refrigerant selection process, the test procedures, and the final results.

  19. Stirling heat pump external heat systems: An appliance perspective

    SciTech Connect (OSTI)

    Vasilakis, A.D.; Thomas, J.F.

    1992-08-01

    A major issue facing the Stirling Engine Heat Pump is system cost, and, in particular, the cost of the External Heat System (EHS). The need for high temperature at the heater head (600{degree}C to 700{degree}C) results in low combustion system efficiencies unless efficient heat recovery is employed. The balance between energy efficiency and use of costly high temperature materials is critical to design and cost optimization. Blower power consumption and NO{sub x} emissions are also important. A new approach to the design and cost optimization of the EHS system was taken by viewing the system from a natural gas-fired appliance perspective. To develop a design acceptable to gas industry requirements, American National Standards Institute (ANSI) code considerations were incorporated into the design process and material selections. A parametric engineering design and cost model was developed to perform the analysis, including the impact of design on NO{sub x} emissions. Analysis results and recommended EHS design and material choices are given.

  20. Stirling heat pump external heat systems: An appliance perspective

    SciTech Connect (OSTI)

    Vasilakis, A.D. ); Thomas, J.F. )

    1992-01-01

    A major issue facing the Stirling Engine Heat Pump is system cost, and, in particular, the cost of the External Heat System (EHS). The need for high temperature at the heater head (600{degree}C to 700{degree}C) results in low combustion system efficiencies unless efficient heat recovery is employed. The balance between energy efficiency and use of costly high temperature materials is critical to design and cost optimization. Blower power consumption and NO{sub x} emissions are also important. A new approach to the design and cost optimization of the EHS system was taken by viewing the system from a natural gas-fired appliance perspective. To develop a design acceptable to gas industry requirements, American National Standards Institute (ANSI) code considerations were incorporated into the design process and material selections. A parametric engineering design and cost model was developed to perform the analysis, including the impact of design on NO{sub x} emissions. Analysis results and recommended EHS design and material choices are given.

  1. Predicts the Steady-State Heating and Cooling Performance of Electric Heat Pump

    Energy Science and Technology Software Center (OSTI)

    1993-01-13

    Oak Ridge National Laboratory (ORNL) is a leader in the development of analytical tools for the design of electrically driven, air-to-air heat pumps. Foremost among these tools is the ORNL Heat Pump Design Model, which can be used to predict the steady-state heating and cooling performance of an electrically driven, air-source heat pump. This version is three to five times faster than the earlier version, easier to use and more versatile.

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

    SciTech Connect (OSTI)

    Thornton, Jeff W.; McDowell, T. P.; Shonder, John A; Hughes, Patrick; Pahud, D.; Hellstrom, G.

    1997-06-01

    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.

  3. Residential vertical geothermal heat pump system models: Calibration to data

    SciTech Connect (OSTI)

    Thornton, J.W.; McDowell, T.P.; Shonder, J.A.; Hughes, P.J.; Pahud, D.; Hellstroem, G.A.J.

    1997-12-31

    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 interconnected to form the system model. The system model was then exercised in order to demonstrate its capabilities.

  4. Technical Highlight: NREL Tests Integrated Heat Pump Water Heater Performance in Different Climates

    SciTech Connect (OSTI)

    Sparn, Bethany

    2012-01-01

    This technical highlight describes NREL tests to capture information about heat pump performance across a wide range of ambient conditions for five heat pump water heaters.

  5. Max Tech Electric Heat Pump Water Heater with Lower GWP Halogenated...

    Energy Savers [EERE]

    Max Tech Electric Heat Pump Water Heater with Lower GWP Halogenated Refrigerant Max Tech Electric Heat Pump Water Heater with Lower GWP Halogenated Refrigerant Information flow ...

  6. Residential Multi-Function Gas Heat Pump: Efficient Engine-Driven...

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

    Efficient Engine-Driven Heat Pump for the Residential Sector Introduction Building on ... controls and appropriate control algorithms for the multi-function heat pump system ...

  7. Geothermal Heat Pump Profitability in Energy Services

    SciTech Connect (OSTI)

    1997-11-01

    If geothermal heat pumps (GHPs) are to make a significant mark in the market, we believe that it will be through energy service pricing contracts offered by retailcos. The benefits of GHPs are ideally suited to energy service pricing (ESP) contractual arrangements; however, few retailcos are thoroughly familiar with the benefits of GHPs. Many of the same barriers that have prevented GHPs from reaching their full potential in the current market environment remain in place for retailcos. A lack of awareness, concerns over the actual efficiencies of GHPs, perceptions of extremely high first costs, unknown records for maintenance costs, etc. have all contributed to limited adoption of GHP technology. These same factors are of concern to retailcos as they contemplate long term customer contracts. The central focus of this project was the creation of models, using actual GHP operating data and the experience of seasoned professionals, to simulate the financial performance of GHPs in long-term ESP contracts versus the outcome using alternative equipment. We have chosen two case studies, which may be most indicative of target markets in the competitive marketplace: A new 37,000 square foot office building in Toronto, Ontario; we also modeled a similar building under the weather conditions of Orlando, Florida. An aggregated residential energy services project using the mass conversion of over 4,000 residential units at Ft. Polk, Louisiana. Our method of analyses involved estimating equipment and energy costs for both the base case and the GHP buildings. These costs are input in to a cash flow analysis financial model which calculates an after-tax cost for the base and GHP case. For each case study customers were assumed to receive a 5% savings over their base case utility bill. A sensitivity analysis was then conducted to determine how key variables affect the attractiveness of a GHP investment.

  8. Technology Solutions Case Study: Heat Pump Water Heater Retrofit

    SciTech Connect (OSTI)

    none,

    2012-08-01

    In this project, Pacific Northwest National Laboratory studied heat pump water heaters, an efficient, cost-effective alternative to traditional electric resistance water heaters that can improve energy efficiency by up to 62%.

  9. Electrical Energy and Demand Savings from a Geothermal Heat Pump...

    Office of Scientific and Technical Information (OSTI)

    space-conditioning systems of an entire city (4,003 military family housing units) have been converted to geothermal heat pumps (GHPs) under an energy savings performance contract. ...

  10. Blue Ridge Electric Cooperative- Heat Pump Loan Program

    Broader source: Energy.gov [DOE]

    Blue Ridge Electric Cooperative (BREC) offers low interest loans to help members finance the purchase of energy efficient heat pumps. Loans under $1,500 can be financed for up to 42 months, and...