National Library of Energy BETA

Sample records for home heating systems

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

    Energy Savers [EERE]

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

  2. PIA - Northeast Home Heating Oil Reserve System (Heating Oil) | Department

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

    of Energy Northeast Home Heating Oil Reserve System (Heating Oil) PIA - Northeast Home Heating Oil Reserve System (Heating Oil) PIA - Northeast Home Heating Oil Reserve System (Heating Oil) PDF icon PIA - Northeast Home Heating Oil Reserve System (Heating Oil) More Documents & Publications PIA - WEB Physical Security Major Application PIA - GovTrip (DOE data) PIA - WEB Unclassified Business Operations General Support

  3. Home Heating Systems | Department of Energy

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

    Heat & Cool » Home Heating Systems Home Heating Systems Home heating accounts for about 30 percent of the energy used in the home. | Photo courtesy iStockphoto.com Home heating accounts for about 30 percent of the energy used in the home. | Photo courtesy iStockphoto.com A variety of technologies are available for heating your house. In addition to heat pumps, which are discussed separately, many homes use the following approaches: Active Solar Heating Uses the sun to heat either air or

  4. Home Heating Systems | Department of Energy

    Office of Environmental Management (EM)

    separately, many homes use the following approaches: Active Solar Heating Uses the sun to heat either air or liquid and can serve as a supplemental heat source. Electric...

  5. Northeast Home Heating Oil Reserve- Online Bidding System

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy has developed an on-line bidding system - an anonymous auction program - for the sale of product from the one million barrel Northeast Home Heating Oil Reserve.

  6. Home Heating | Department of Energy

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

    Heating Home Heating Energy Saver 101 Infographic: Home Heating Energy Saver 101 Infographic: Home Heating Everything you need to know about home heating, including how heating systems work, the different types on the market and proper maintenance. Read more Thermostats Thermostats Save money on heating by automatically setting back your thermostat when you are asleep or away. Read more Wood and Pellet Heating Wood and Pellet Heating Wood and pellets are renewable fuel sources, and modern wood

  7. BETTER DUCT SYSTEMS FOR HOME HEATING AND COOLING.

    SciTech Connect (OSTI)

    ANDREWS,J.

    2001-01-01

    This is a series of six guides intended to provide a working knowledge of residential heating and cooling duct systems, an understanding of the major issues concerning efficiency, comfort, health, and safety, and practical tips on installation and repair of duct systems. These guides are intended for use by contractors, system designers, advanced technicians, and other HVAC professionals. The first two guides are also intended to be accessible to the general reader.

  8. Measured heating system efficiency retrofits in eight manufactured (HUD-code) homes

    SciTech Connect (OSTI)

    Siegel, J.; Davis, B.; Francisco, P.; Palmiter, L.

    1998-07-01

    This report presents the results of field measurements of heating efficiency performed on eight all-electric manufactured homes sited in the Pacific Northwest with forced-air distribution systems. These homes, like more than four million existing manufactured homes in the US, were constructed to thermal specifications that were mandated by the US Department of Housing and Urban Development in 1976. The test protocol compares real-time measurements of furnace energy usage with energy usage during periods when zonal heaters heat the homes to the same internal temperature. By alternating between the furnace and zonal heaters on 2 hour cycles, a short-term coheat test is performed. Additional measurements, including blower door and duct tightness tests, are conducted to measure and characterize the home's tightness and duct leakage so that coheat test results might be linked to other measures of building performance. The testing was done at each home before and after an extensive duct sealing retrofit was performed. The average pre-retrofit system efficiency for these homes was 69%. After the retrofit, the average system efficiency increased to 83%. The average simple payback period for the retrofits ranges from 1 to 5 years in Western Oregon and 1 to 3 years in colder Eastern Oregon.

  9. Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes - Business Case Assessment

    SciTech Connect (OSTI)

    Baxter, Van D

    2007-05-01

    The long range strategic goal of the Department of Energy's Building Technologies (DOE/BT) Program is to create, by 2020, technologies and design approaches that enable the construction of net-zero energy homes at low incremental cost (DOE/BT 2005). A net zero energy home (NZEH) is a residential building with greatly reduced needs for energy through efficiency gains, with the balance of energy needs supplied by renewable technologies. While initially focused on new construction, these technologies and design approaches are intended to have application to buildings constructed before 2020 as well resulting in substantial reduction in energy use for all building types and ages. DOE/BT's Emerging Technologies (ET) team is working to support this strategic goal by identifying and developing advanced heating, ventilating, air-conditioning, and water heating (HVAC/WH) technology options applicable to NZEHs. Although the energy efficiency of heating, ventilating, and air-conditioning (HVAC) equipment has increased substantially in recent years, new approaches are needed to continue this trend. Dramatic efficiency improvements are necessary to enable progress toward the NZEH goals, and will require a radical rethinking of opportunities to improve system performance. The large reductions in HVAC energy consumption necessary to support the NZEH goals require a systems-oriented analysis approach that characterizes each element of energy consumption, identifies alternatives, and determines the most cost-effective combination of options. In particular, HVAC equipment must be developed that addresses the range of special needs of NZEH applications in the areas of reduced HVAC and water heating energy use, humidity control, ventilation, uniform comfort, and ease of zoning. In FY05 ORNL conducted an initial Stage 1 (Applied Research) scoping assessment of HVAC/WH systems options for future NZEHs to help DOE/BT identify and prioritize alternative approaches for further development. Eleven system concepts with central air distribution ducting and nine multi-zone systems were selected and their annual and peak demand performance estimated for five locations: Atlanta (mixed-humid), Houston (hot-humid), Phoenix (hot-dry), San Francisco (marine), and Chicago (cold). Performance was estimated by simulating the systems using the TRNSYS simulation engine (Solar Energy Laboratory et al. 2006) in two 1800-ft{sup 2} houses--a Building America (BA) benchmark house and a prototype NZEH taken from BEopt results at the take-off (or crossover) point (i.e., a house incorporating those design features such that further progress towards ZEH is through the addition of photovoltaic power sources, as determined by current BEopt analyses conducted by NREL). Results were summarized in a project report, 'HVAC Equipment Design options for Near-Zero-Energy Homes--A Stage 2 Scoping Assessment', ORNL/TM-2005/194 (Baxter 2005). The 2005 study report describes the HVAC options considered, the ranking criteria used, and the system rankings by priority. Table 1 summarizes the energy savings potential of the highest scoring options from the 2005 study for all five locations. All system options were scored by the ORNL building equipment research team and by William Goetzler of Navigant Consulting. These scores were reviewed by DOE/BT's Residential Integration program leaders and Building America team members. Based on these results, the two centrally ducted integrated heat pump (IHP) systems (air source and ground source versions) were selected for advancement to Stage 2 (Exploratory Development) business case assessments in FY06. This report describes results of these business case assessments. It is a compilation of three separate reports describing the initial business case study (Baxter 2006a), an update to evaluate the impact of an economizer cooling option (Baxter 2006b), and a second update to evaluate the impact of a winter humidification option (Baxter 2007). In addition it reports some corrections made subsequent to release of the first two reports to correct some errors in the TRNSYS building model for Atlanta and in the refrigerant pressure drop calculation in the water-to-refrigerant evaporator module of the ORNL Heat Pump Design Model (HPDM) used for the IHP analyses. These changes resulted in some minor differences between IHP performance as reported in Baxter (2006a, b) and in this report.

  10. Technology Solutions for New Homes Case Study: Indirect Solar Water Heating Systems in Single-Family Homes

    Broader source: Energy.gov [DOE]

    In 2011, Rural Development, Inc. (RDI) completed the construction of Wisdom Way Solar Village (WWSV), which is a development of 20 very efficient homes in Greenfield, Massachusetts. The homes...

  11. Building America Whole-House Solutions for Existing Homes: Multifamily Individual Heating and Ventilation Systems

    Broader source: Energy.gov [DOE]

    The conversion of an older Massachusetts building into condominiums illustrates a safe, durable, and cost-effective solution for heating and ventilation systems in multifamily buildings.

  12. NORTHEAST HOME HEATING OIL RESERVE TRIGGER MECHANISM | Department...

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

    NORTHEAST HOME HEATING OIL RESERVE TRIGGER MECHANISM NORTHEAST HOME HEATING OIL RESERVE TRIGGER MECHANISM Historical Northeast Home Heating Oil Reserve Trigger Mechanism Charts PDF ...

  13. NORTHEAST HOME HEATING OIL RESERVE (NEHHOR) QUESTIONS AND ANSWERS

    Broader source: Energy.gov [DOE]

    The Questions and Answers document is a compilation of the most commonly asked questions (and answers) concerning the online auction system for the Northeast Home Heating Oil Reserve.

  14. Combi Systems for Low Load homes

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

    Context Technical Approach * A condensing water heater and hydronic air handler will used to provide space and water heating loads in almost 300 weatherized homes. * System ...

  15. Northeast Home Heating Oil Reserve - Guidelines for Release ...

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

    Heating Oil Reserve Northeast Home Heating Oil Reserve - Guidelines for Release Northeast Home Heating Oil Reserve - Guidelines for Release The Energy Policy and Conservation ...

  16. Initial Business Case Analysis of Two Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes

    SciTech Connect (OSTI)

    Baxter, Van D

    2006-11-01

    The long range strategic goal of the Department of Energy's Building Technologies (DOE/BT) Program is to create, by 2020, technologies and design approaches that enable the construction of net-zero energy homes at low incremental cost (DOE/BT 2005). A net zero energy home (NZEH) is a residential building with greatly reduced needs for energy through efficiency gains, with the balance of energy needs supplied by renewable technologies. While initially focused on new construction, these technologies and design approaches are intended to have application to buildings constructed before 2020 as well resulting in substantial reduction in energy use for all building types and ages. DOE/BT's Emerging Technologies (ET) team is working to support this strategic goal by identifying and developing advanced heating, ventilating, air-conditioning, and water heating (HVAC/WH) technology options applicable to NZEHs. Although the energy efficiency of heating, ventilating, and air-conditioning (HVAC) equipment has increased substantially in recent years, new approaches are needed to continue this trend. Dramatic efficiency improvements are necessary to enable progress toward the NZEH goals, and will require a radical rethinking of opportunities to improve system performance. The large reductions in HVAC energy consumption necessary to support the NZEH goals require a systems-oriented analysis approach that characterizes each element of energy consumption, identifies alternatives, and determines the most cost-effective combination of options. In particular, HVAC equipment must be developed that addresses the range of special needs of NZEH applications in the areas of reduced HVAC and water heating energy use, humidity control, ventilation, uniform comfort, and ease of zoning. In FY05 ORNL conducted an initial Stage 1 (Applied Research) scoping assessment of HVAC/WH systems options for future NZEHs to help DOE/BT identify and prioritize alternative approaches for further development. Eleven system concepts with central air distribution ducting and nine multi-zone systems were selected and their annual and peak demand performance estimated for five locations: Atlanta (mixed-humid), Houston (hot-humid), Phoenix (hot-dry), San Francisco (marine), and Chicago (cold). Performance was estimated by simulating the systems using the TRNSYS simulation engine (Solar Energy Laboratory et al. 2006) in two 1800-ft{sup 2} houses--a Building America (BA) benchmark house and a prototype NZEH taken from BEopt results at the take-off (or crossover) point (i.e., a house incorporating those design features such that further progress towards ZEH is through the addition of photovoltaic power sources, as determined by current BEopt analyses conducted by NREL). Results were summarized in a project report, 'HVAC Equipment Design options for Near-Zero-Energy Homes--A Stage 2 Scoping Assessment,' ORNL/TM-2005/194 (Baxter 2005). The 2005 study report describes the HVAC options considered, the ranking criteria used, and the system rankings by priority. Table 1 summarizes the energy savings potential of the highest scoring options from the 2005 study for all five locations.

  17. Hillbrook Nursing Home Space Heating Low Temperature Geothermal...

    Open Energy Info (EERE)

    Hillbrook Nursing Home Space Heating Low Temperature Geothermal Facility Jump to: navigation, search Name Hillbrook Nursing Home Space Heating Low Temperature Geothermal Facility...

  18. Energy Saver 101 Infographic: Home Heating | Department of Energy

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

    Heating Energy Saver 101 Infographic: Home Heating December 16, 2013 - 10:48am Addthis Our new Energy Saver 101 infographic lays out everything you need to know about home heating -- from how heating systems work and the different types on the market to what to look for when replacing your system and proper maintenance. Download a <a href="/node/784286">high-resolution version</a> of the infographic or individual sections. | Infographic by <a

  19. Home Heating Hints | Department of Energy

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

    Home Heating Hints Home Heating Hints December 9, 2014 - 5:10pm Addthis Sealing air leaks can help you save energy and money this winter. | Photo courtesy of Dennis Schroeder, National Renewable Energy Laboratory Sealing air leaks can help you save energy and money this winter. | Photo courtesy of Dennis Schroeder, National Renewable Energy Laboratory Erik Hyrkas Erik Hyrkas Media Relations Specialist, Office of Energy Efficiency & Renewable Energy What are the key facts? Programmable

  20. Energy Saver 101: Home Heating | Department of Energy

    Energy Savers [EERE]

    Energy Saver 101: Home Heating Space heating is likely the largest energy expense in your home, accounting for about 45 percent of the average American family's energy bills. That...

  1. Energy Saver 101: Home Heating | Department of Energy

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

    Energy Saver 101: Home Heating Space heating is likely the largest energy expense in your home, accounting for about 45 percent of the average American family's energy bills. That ...

  2. Guide to Home Heating and Cooling

    SciTech Connect (OSTI)

    2010-10-01

    Get the most out of your heating and cooling systems, including types, how to choose, and performing maintenance.

  3. Energy Savings Week: Lowering Energy Bills with Efficient Home Heating

    Broader source: Energy.gov [DOE]

    With winter in full swing in many parts of the U.S., your thermostat may be getting more attention than usual. Whether you have a furnace, boiler, or heat pump system, you want to make sure your home stays warm—especially as holiday guests arrive. Fortunately, the Energy Department’s efforts to improve efficiency standards is paying dividends with energy bills associated with heating and appliances lower compared to past holiday seasons.

  4. Heat Distribution Systems | Department of Energy

    Energy Savers [EERE]

    Home Heating Systems » Heat Distribution Systems Heat Distribution Systems Radiators are used in steam and hot water heating. | Photo courtesy of ©iStockphoto/Jot Radiators are used in steam and hot water heating. | Photo courtesy of ©iStockphoto/Jot Heat is distributed through your home in a variety of ways. Forced-air systems use ducts that can also be used for central air conditioning and heat pump systems. Radiant heating systems also have unique heat distribution systems. That leaves

  5. Heat Distribution Systems | Department of Energy

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

    & Cool » Home Heating Systems » Heat Distribution Systems Heat Distribution Systems Radiators are used in steam and hot water heating. | Photo courtesy of ©iStockphoto/Jot Radiators are used in steam and hot water heating. | Photo courtesy of ©iStockphoto/Jot Heat is distributed through your home in a variety of ways. Forced-air systems use ducts that can also be used for central air conditioning and heat pump systems. Radiant heating systems also have unique heat distribution systems.

  6. #AskEnergySaver: Home Heating | Department of Energy

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

    Heating #AskEnergySaver: Home Heating October 29, 2014 - 12:56pm Addthis This month our experts answered your #AskEnergySaver questions on home heating. | Image courtesy of Sarah Gerrity, Energy Department. This month our experts answered your #AskEnergySaver questions on home heating. | Image courtesy of Sarah Gerrity, Energy Department. Allison Lantero Allison Lantero Digital Content Specialist, Office of Public Affairs Looking for more ways to save energy? Check out Energy Saver for

  7. Northeast Home Heating Oil Reserve - Guidelines for Release | Department of

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

    Energy Heating Oil Reserve » Northeast Home Heating Oil Reserve - Guidelines for Release Northeast Home Heating Oil Reserve - Guidelines for Release The Energy Policy and Conservation Act, as amended, sets conditions for the release of the Northeast Home Heating Oil Reserve. The Secretary of Energy has the authority to sell, exchange, or otherwise dispose of petroleum distillate from the Reserve in order to maintain the quality or quantity of the petroleum distillate or to maintain the

  8. The Future of Home Heating | Department of Energy

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

    The Future of Home Heating The Future of Home Heating Huber presentation on May 8, 2012 at the Pyrolysis Oil Workshop on the future of home heating PDF icon pyrolysis_huber.pdf More Documents & Publications Technical Information Exchange on Pyrolysis Oil: Potential for a Renewab;e Heating Oil Substation Fuel in New England Performance of Biofuels and Biofuel Blends A Life-Cycle Assessment Comparing Select Gas-to-Liquid Fuels with Conventional Fuels in the Transportation Sector

  9. Using Home Energy Scoring Systems

    Broader source: Energy.gov [DOE]

    Better Buildings Neighborhood Program Data and Evaluation Peer Exchange Call: Using Home Energy Scoring Systems, call slides and discussion summary, March 28, 2013.

  10. Heating System Basics | Department of Energy

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

    System Basics Heating System Basics August 16, 2013 - 2:32pm Addthis A variety of heating technologies are available today. You can learn more about what heating systems and heat pumps are commonly used today and how they work below. To learn how to use these technologies in your own home, see the Home Heating Systems section on Energy Saver. Furnaces and Boilers Furnaces heat air and distribute the heated air through a building using ducts. Boilers heat water, providing either hot water or

  11. Webinar: ENERGY STAR Hot Water Systems for High Performance Homes |

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

    Department of Energy Webinar: ENERGY STAR Hot Water Systems for High Performance Homes Webinar: ENERGY STAR Hot Water Systems for High Performance Homes This presentation is from the Building America research team BA-PIRC webinar on September 30, 2011 providing informationprovide information about how to achieve energy savings from solar water heating, electric dedicated heat pump water heating, and gas tankless systems. PDF icon es_hot_water_systems.pdf More Documents & Publications

  12. Energy Saver 101 Infographic: Home Heating | Department of Energy

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

    Office of Public Affairs Space heating is likely the largest energy expense in your home, accounting for about 45 percent of the average American family's energy bills. That...

  13. Additional Storage Contracts Awarded for Northeast Home Heating Oil Reserve

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy has completed the acquisition of commercial storage services for the one million barrel Northeast Home Heating Oil Reserve.

  14. Bio-Oil Deployment in the Home Heating Market

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

    Bio-Oil Deployment in the Home Heating Market March 23, 2015 Dr. Thomas A. Butcher ... and end user acceptance. * Heating oil and diesel transportation both use the same ...

  15. DOE Accepts Bids for Northeast Home Heating Oil Stocks

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) today has awarded contracts to three companies who successfully bid for the purchase of 984,253 barrels of heating oil from the Northeast Home Heating Oil Reserve.

  16. Building America Case Study: Indirect Solar Water Heating Systems...

    Energy Savers [EERE]

    Indirect Solar Water Heating Systems in Single-Family Homes Greenfield, Massachusetts ... Building Component: Solar water heating Application: Single-family Years Tested: 2010-2013 ...

  17. #HeatChat @Energy: Ask Us Your Home Heating Questions | Department of

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

    Energy #HeatChat @Energy: Ask Us Your Home Heating Questions #HeatChat @Energy: Ask Us Your Home Heating Questions October 21, 2015 - 10:10am Addthis Check out our <a href="/node/780416">Energy Saver 101 infographic</a> for everything you need to know about home heating. Check out our Energy Saver 101 infographic for everything you need to know about home heating. Paul Lester Paul Lester Digital Content Specialist, Office of Public Affairs How can I participate? Ask us

  18. Passive solar heated energy conserving biosphere home. Final report

    SciTech Connect (OSTI)

    Piekarski, R.

    1985-01-01

    ''Warm Gold'' is an original design of a passive solar heated energy conserving biosphere home. It has been owner-built with financial help from the US Department of Energy through its Appropriate Technology Small Grants Program of 1980. The home incorporates the six major components of passive solar design: appropriate geometry and orientation, glazing, light levels and reflective surfaces, ventilation, thermal storage, and insulation. Warm Gold is an earth-sheltered home with earth cover on the roof as well as on the two opaque north leg walls. It is of durable and efficient masonry construction which included stone masonry with on-site materials and cement block and ready mix concrete. Excavation, backfill, and drainage were necessary aspects of earth sheltered construction together with the all-important Bentonite waterproofing system. Warm Gold is a house which meets all the national building code standards of HUD. The home has two bedrooms, one bathroom, living room, dining room-kitchen, greenhouse, and utility annex, all of which are incorporated with the earth-sheltered, passive solar systems to be a comfortable, energy-efficient living environment.

  19. Initial Business Case Analysis of Two Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes - Update to Include Evaluation of Impact of Including a Humidifier Option

    SciTech Connect (OSTI)

    Baxter, Van D

    2007-02-01

    The long range strategic goal of the Department of Energy's Building Technologies (DOE/BT) Program is to create, by 2020, technologies and design approaches that enable the construction of net-zero energy homes at low incremental cost (DOE/BT 2005). A net zero energy home (NZEH) is a residential building with greatly reduced needs for energy through efficiency gains, with the balance of energy needs supplied by renewable technologies. While initially focused on new construction, these technologies and design approaches are intended to have application to buildings constructed before 2020 as well resulting in substantial reduction in energy use for all building types and ages. DOE/BT's Emerging Technologies (ET) team is working to support this strategic goal by identifying and developing advanced heating, ventilating, air-conditioning, and water heating (HVAC/WH) technology options applicable to NZEHs. In FY05 ORNL conducted an initial Stage 1 (Applied Research) scoping assessment of HVAC/WH systems options for future NZEHs to help DOE/BT identify and prioritize alternative approaches for further development. Eleven system concepts with central air distribution ducting and nine multi-zone systems were selected and their annual and peak demand performance estimated for five locations: Atlanta (mixed-humid), Houston (hot-humid), Phoenix (hot-dry), San Francisco (marine), and Chicago (cold). Performance was estimated by simulating the systems using the TRNSYS simulation engine (Solar Energy Laboratory et al. 2006) in two 1800-ft{sup 2} houses--a Building America (BA) benchmark house and a prototype NZEH taken from BEopt results at the take-off (or crossover) point (i.e., a house incorporating those design features such that further progress towards ZEH is through the addition of photovoltaic power sources, as determined by current BEopt analyses conducted by NREL). Results were summarized in a project report, HVAC Equipment Design options for Near-Zero-Energy Homes--A Stage 2 Scoping Assessment, ORNL/TM-2005/194 (Baxter 2005). The 2005 study report describes the HVAC options considered, the ranking criteria used, and the system rankings by priority. In 2006, the two top-ranked options from the 2005 study, air-source and ground-source versions of a centrally ducted integrated heat pump (IHP) system, were subjected to an initial business case study. The IHPs were subjected to a more rigorous hourly-based assessment of their performance potential compared to a baseline suite of equipment of legally minimum efficiency that provided the same heating, cooling, water heating, demand dehumidification, and ventilation services as the IHPs. Results were summarized in a project report, Initial Business Case Analysis of Two Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes, ORNL/TM-2006/130 (Baxter 2006a). The present report is an update to that document which summarizes results of an analysis of the impact of adding a humidifier to the HVAC system to maintain minimum levels of space relative humidity (RH) in winter. The space RH in winter has direct impact on occupant comfort and on control of dust mites, many types of disease bacteria, and 'dry air' electric shocks. Chapter 8 in ASHRAE's 2005 Handbook of Fundamentals (HOF) suggests a 30% lower limit on RH for indoor temperatures in the range of {approx}68-69F based on comfort (ASHRAE 2005). Table 3 in chapter 9 of the same reference suggests a 30-55% RH range for winter as established by a Canadian study of exposure limits for residential indoor environments (EHD 1987). Harriman, et al (2001) note that for RH levels of 35% or higher, electrostatic shocks are minimized and that dust mites cannot live at RH levels below 40%. They also indicate that many disease bacteria life spans are minimized when space RH is held within a 30-60% range. From the foregoing it is reasonable to assume that a winter space RH range of 30-40% would be an acceptable compromise between comfort considerations and limitation of growth rates for dust mites and many bacteria. In addition it reports some corrections made to the simulation models used in order to correct some errors in the TRNSYS building model for Atlanta and in the refrigerant pressure drop calculation in the water-to-refrigerant evaporator module of the ORNL Heat Pump Design Model (HPDM) used for the IHP analyses. These changes resulted in some minor differences between IHP performance as reported in Baxter (2006) and in this report.

  20. #AskEnergySaver: Home Water Heating | Department of Energy

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

    Water Heating #AskEnergySaver: Home Water Heating March 24, 2014 - 11:35am Addthis Did you know: Water heaters account for nearly 17 percent of a home’s energy use, consuming more energy than all other household appliances combined. For more about water heaters, check out our <a href="/node/612476">Energy Saver 101 home water heating infographic</a>. | Photo by Eric Grigorian, U.S. Department of Energy Solar Decathlon. Did you know: Water heaters account for nearly 17

  1. DOE Seeks Commercial Storage for Northeast Home Heating Oil Reserve |

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

    Department of Energy Seeks Commercial Storage for Northeast Home Heating Oil Reserve DOE Seeks Commercial Storage for Northeast Home Heating Oil Reserve March 14, 2011 - 1:00pm Addthis Washington, DC - The Department of Energy, through its agent, DLA Energy, has issued a solicitation for new contracts to store two million barrels of ultra low sulfur distillate for the Northeast Home Heating Oil Reserve in New York Harbor and New England. Offers are due no later than 9:00 a.m. EDT on March

  2. DOE Awards Storage Contracts for Northeast Home Heating Oil Reserve

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy today announced that new contracts have been awarded for commercial storage of 650,000 barrels of ultra low sulfur distillate for the Northeast Home Heating Oil Reserve.

  3. Initial Business Case Analysis of Two Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes -- Update to Include Analyses of an Economizer Option and Alternative Winter Water Heating Control Option

    SciTech Connect (OSTI)

    Baxter, Van D

    2006-12-01

    The long range strategic goal of the Department of Energy's Building Technologies (DOE/BT) Program is to create, by 2020, technologies and design approaches that enable the construction of net-zero energy homes at low incremental cost (DOE/BT 2005). A net zero energy home (NZEH) is a residential building with greatly reduced needs for energy through efficiency gains, with the balance of energy needs supplied by renewable technologies. While initially focused on new construction, these technologies and design approaches are intended to have application to buildings constructed before 2020 as well resulting in substantial reduction in energy use for all building types and ages. DOE/BT's Emerging Technologies (ET) team is working to support this strategic goal by identifying and developing advanced heating, ventilating, air-conditioning, and water heating (HVAC/WH) technology options applicable to NZEHs. Although the energy efficiency of heating, ventilating, and air-conditioning (HVAC) equipment has increased substantially in recent years, new approaches are needed to continue this trend. Dramatic efficiency improvements are necessary to enable progress toward the NZEH goals, and will require a radical rethinking of opportunities to improve system performance. The large reductions in HVAC energy consumption necessary to support the NZEH goals require a systems-oriented analysis approach that characterizes each element of energy consumption, identifies alternatives, and determines the most cost-effective combination of options. In particular, HVAC equipment must be developed that addresses the range of special needs of NZEH applications in the areas of reduced HVAC and water heating energy use, humidity control, ventilation, uniform comfort, and ease of zoning. In FY05 ORNL conducted an initial Stage 1 (Applied Research) scoping assessment of HVAC/WH systems options for future NZEHs to help DOE/BT identify and prioritize alternative approaches for further development. Eleven system concepts with central air distribution ducting and nine multi-zone systems were selected and their annual and peak demand performance estimated for five locations: Atlanta (mixed-humid), Houston (hot-humid), Phoenix (hot-dry), San Francisco (marine), and Chicago (cold). Performance was estimated by simulating the systems using the TRNSYS simulation engine (Solar Energy Laboratory et al. 2006) in two 1800-ft{sup 2} houses--a Building America (BA) benchmark house and a prototype NZEH taken from BEopt results at the take-off (or crossover) point (i.e., a house incorporating those design features such that further progress towards ZEH is through the addition of photovoltaic power sources, as determined by current BEopt analyses conducted by NREL). Results were summarized in a project report, HVAC Equipment Design options for Near-Zero-Energy Homes--A Stage 2 Scoping Assessment, ORNL/TM-2005/194 (Baxter 2005). The 2005 study report describes the HVAC options considered, the ranking criteria used, and the system rankings by priority. In 2006, the two top-ranked options from the 2005 study, air-source and ground-source versions of an integrated heat pump (IHP) system, were subjected to an initial business case study. The IHPs were subjected to a more rigorous hourly-based assessment of their performance potential compared to a baseline suite of equipment of legally minimum efficiency that provided the same heating, cooling, water heating, demand dehumidification, and ventilation services as the IHPs. Results were summarized in a project report, Initial Business Case Analysis of Two Integrated Heat Pump HVAC Systems for Near-Zero-Energy Homes, ORNL/TM-2006/130 (Baxter 2006). The present report is an update to that document. Its primary purpose is to summarize results of an analysis of the potential of adding an outdoor air economizer operating mode to the IHPs to take advantage of free cooling (using outdoor air to cool the house) whenever possible. In addition it provides some additional detail for an alternative winter water heating/space heating (WH/SH) control strategy briefly described in the original report and corrects some minor errors.

  4. Save on Home Water Heating | Department of Energy

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

    on Home Water Heating Save on Home Water Heating August 19, 2014 - 10:46am Addthis Purchasing a water heater with the ENERGY STAR® label ensures you are buying an energy efficient appliance designed to save consumers money. | Photo courtesy of Dennis Schroeder, National Renewable Energy Labs Purchasing a water heater with the ENERGY STAR® label ensures you are buying an energy efficient appliance designed to save consumers money. | Photo courtesy of Dennis Schroeder, National Renewable

  5. DOE to Purchase Heating Oil for the Northeast Home Heating Oil Reserve

    Office of Energy Efficiency and Renewable Energy (EERE)

    WASHINGTON, DC -The U.S. Department of Energy (DOE) today issued a solicitation seeking to purchase heating oil for the Northeast Home Heating Oil Reserve (NEHHOR) using $3 million in appropriated...

  6. LOW SULFUR HOME HEATING OIL DEMONSTRATION PROJECT SUMMARY REPORT.

    SciTech Connect (OSTI)

    BATEY, J.E.; MCDONALD, R.J.

    2005-06-01

    This project was funded by NYSERDA and has clearly demonstrated many advantages of using low sulfur content heating oil to provide thermal comfort in homes. Prior laboratory research in the United States and Canada had indicated a number of potential benefits of using lower sulfur (0.05%) heating oil. However, this prior research has not resulted in the widespread use of low sulfur fuel oil in the marketplace. The research project described in this report was conducted with the assistance of a well-established fuel oil marketer in New York State (NYS) and has provided clear proof of the many real-world advantages of marketing and using low sulfur content No. 2 fuel oil. The very positive experience of the participating marketer over the past three years has already helped to establish low sulfur heating oil as a viable option for many other fuel marketers. In large part, based on the initial findings of this project and the experience of the participating NYS oilheat marketer, the National Oilheat Research Alliance (NORA) has already fully supported a resolution calling for the voluntary use of low sulfur (0.05 percent) home heating oil nationwide. The NORA resolution has the goal of converting eighty percent of all oil-heated homes to the lower sulfur fuel (0.05 percent by weight) by the year 2007. The Oilheat Manufacturers Association (OMA) has also passed a resolution fully supporting the use of lower sulfur home heating oil in the equipment they manufacture. These are important endorsements by prominent national oil heat associations. Using lower sulfur heating oil substantially lowers boiler and furnace fouling rates. Laboratory studies had indicated an almost linear relationship between sulfur content in the oil and fouling rates. The completed NYSERDA project has verified past laboratory studies in over 1,000 occupied residential homes over the course of three heating seasons. In fact, the reduction in fouling rates so clearly demonstrated by this project is almost the same as predicted by past laboratory studies. Fouling deposition rates are reduced by a factor of two to three by using lower sulfur oil. This translates to a potential for substantial service cost savings by extending the interval between labor-intensive cleanings of the internal surfaces of the heating systems in these homes. In addition, the time required for annual service calls can be lowered, reducing service costs and customer inconvenience. The analyses conducted as part of this field demonstration project indicates that service costs can be reduced by up to $200 million a year nationwide by using lower sulfur oil and extending vacuum cleaning intervals depending on the labor costs and existing cleaning intervals. The ratio of cost savings to added fuel costs is economically attractive based on past fuel price differentials for the lower sulfur product. The ratio of cost savings to added costs vary widely as a function of hourly service rates and the additional cost for lower sulfur oil. For typical values, the expected benefit is a factor of two to four higher than the added fuel cost. This means that for every dollar spent on higher fuel cost, two to four dollars can be saved by lowered vacuum cleaning costs when the cleaning intervals are extended. Information contained in this report can be used by individual oil marketers to estimate the benefit to cost ratio for their specific applications. Sulfur oxide and nitrogen oxide air emissions are reduced substantially by using lower sulfur fuel oil in homes. Sulfur oxides emissions are lowered by 75 percent by switching from fuel 0.20 percent to 0.05 percent sulfur oil. This is a reduction of 63,000 tons a year nationwide. In New York State, sulfur oxide emissions are reduced by 13,000 tons a year. This translates to a total value of $12 million a year in Sulfur Oxide Emission Reduction Credits for an emission credit cost of $195 a ton. While this ''environmental cost'' dollar savings is smaller than the potential service costs reduction, it is very significant. It represents an important reduction in air pollutants that contribute directly to acid rain and other adverse impacts in the United States. When all air emissions are included, low sulfur content home heating oil and utility gas are virtually equal in their environmental impacts.

  7. STEO October 2012 - home heating use

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

    most common primary heating fuel, is expected to be up 14 percent this winter, according to the U.S. Energy Information ... While prices for the major heating fuels will be mostly flat ...

  8. DOE Completes Sale of Northeast Home Heating Oil Stocks

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy today has awarded contracts to four companies who successfully bid for the purchase of 1,000,000 barrels of heating oil from the Northeast Home Heating Oil Reserve storage sites in Groton and New Haven, CT.

  9. 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.

  10. 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.

  11. 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.

  12. 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.

  13. Planning a Home Solar Electric System | Department of Energy

    Office of Environmental Management (EM)

    Planning a Home Solar Electric System Planning a Home Solar Electric System Whether a home solar electric system will work for you depends on the available sun (resource),...

  14. Home Heating Hints | Department of Energy

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

    are not blocking heating registers. This will allow air to circulate more freely and save energy. Winter may mean colder weather is here, but it doesn't have to drain your...

  15. STEO October 2012 - home heating supplies

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

    sulfur levels for the first time, the heating oil market is expected to be tighter this winter, according to the U.S. Energy Information Administration's new winter fuels forecast. ...

  16. Spins and Heat in Nanoscale Electronic Systems (SHINES) | U.S...

    Office of Science (SC) Website

    Spins and Heat in Nanoscale Electronic Systems (SHINES) Energy Frontier Research Centers ... History Contact BES Home Centers Spins and Heat in Nanoscale Electronic Systems (SHINES) ...

  17. Earth-sheltered compromise home saves on heating, cooling costs

    SciTech Connect (OSTI)

    Frankhauser, T.

    1985-02-01

    Building a home into the side of a hill to take advantage of the earth's temperature-neutralizing qualities and facing it to the south will reduce heating and cooling costs. A home in North Dakota based on these principles has never had two unheated rooms freeze and needs no air conditioning. Mutli-zoned thermostats are located in the south-facing rooms. Other features are a five-foot overhang, lower ceilings, aluminum foil deflectors beneath carpets and above the plasterboard in the ceiling, and extra insulation. By eliminating an earth covering that would require sturdier support, construction costs were competitive with regular frame construction.

  18. Air-to-Water Heat Pumps With Radiant Delivery in Low-Load Homes

    SciTech Connect (OSTI)

    Backman, C.; German, A.; Dakin, B.; Springer, D.

    2013-12-01

    Space conditioning represents nearly 50% of average residential household energy consumption, highlighting the need to identify alternative cost-effective, energy-efficient cooling and heating strategies. As homes are better built, there is an increasing need for strategies that are particularly well suited for high performance, low load homes. ARBI researchers worked with two test homes in hot-dry climates to evaluate the in-situ performance of air-to-water heat pump (AWHP) systems, an energy efficient space conditioning solution designed to cost-effectively provide comfort in homes with efficient, safe, and durable operation. Two monitoring projects of test houses in hot-dry climates were initiated in 2010 to test this system. Both systems were fully instrumented and have been monitored over one year to capture complete performance data over the cooling and heating seasons. Results are used to quantify energy savings, cost-effectiveness, and system performance using different operating modes and strategies. A calibrated TRNSYS model was developed and used to evaluate performance in various climate regions. This strategy is most effective in tight, insulated homes with high levels of thermal mass (i.e. exposed slab floors).

  19. Air-to-Water Heat Pumps With Radiant Delivery in Low-Load Homes

    SciTech Connect (OSTI)

    Backman, C.; German, A.; Dakin, B.; Springer, D.

    2013-12-01

    Space conditioning represents nearly 50% of average residential household energy consumption, highlighting the need to identify alternative cost-effective, energy-efficient cooling and heating strategies. As homes are better built, there is an increasing need for strategies that are particularly well suited for high performance, low load homes. ARBI researchers worked with two test homes in hot-dry climates to evaluate the in-situ performance of air-to-water heat pump systems, an energy efficient space conditioning solution designed to cost-effectively provide comfort in homes with efficient, safe, and durable operation. Two monitoring projects of test houses in hot-dry climates were initiated in 2010 to test this system. Both systems were fully instrumented and have been monitored over one year to capture complete performance data over the cooling and heating seasons. Results are used to quantify energy savings, cost-effectiveness, and system performance using different operating modes and strategies. A calibrated TRNSYS model was developed and used to evaluate performance in various climate regions. This strategy is most effective in tight, insulated homes with high levels of thermal mass (i.e. exposed slab floors).

  20. 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.

  1. Evaluating Ventilation Systems for Existing Homes

    SciTech Connect (OSTI)

    Aldrich, Robb; Arena, Lois

    2013-02-01

    In an effort to improve housing options near Las Vegas, Nevada, the Clark County Community Resources Division (CCCRD) performs substantial renovations to foreclosed homes. After dramatic energy, aesthetic, and health and safety improvements are made, homes are rented or sold to qualified residents. This report describes the evaluation and selection of ventilation systems for these homes, including key considerations when selecting an ideal system. The report then describes CCCRD’s decision process with respect to ventilation.

  2. Heat transfer system

    DOE Patents [OSTI]

    Not Available

    1980-03-07

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

  3. Heat transfer system

    DOE Patents [OSTI]

    McGuire, Joseph C.

    1982-01-01

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

  4. Heating systems for heating subsurface formations

    DOE Patents [OSTI]

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

    2011-04-26

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

  5. Heat Pump Water Heaters and American Homes: A Good Fit?

    SciTech Connect (OSTI)

    Franco, Victor; Lekov, Alex; Meyers, Steve; Letschert, Virginie

    2010-05-14

    Heat pump water heaters (HPWHs) are over twice as energy-efficient as conventional electric resistance water heaters, with the potential to save substantial amounts of electricity. Drawing on analysis conducted for the U.S. Department of Energy's recently-concluded rulemaking on amended standards for water heaters, this paper evaluates key issues that will determine how well, and to what extent, this technology will fit in American homes. The key issues include: 1) equipment cost of HPWHs; 2) cooling of the indoor environment by HPWHs; 3) size and air flow requirements of HPWHs; 4) performance of HPWH under different climate conditions and varying hot water use patterns; and 5) operating cost savings under different electricity prices and hot water use. The paper presents the results of a life-cycle cost analysis of the adoption of HPWHs in a representative sample of American homes, as well as national impact analysis for different market share scenarios. Assuming equipment costs that would result from high production volume, the results show that HPWHs can be cost effective in all regions for most single family homes, especially when the water heater is not installed in a conditioned space. HPWHs are not cost effective for most manufactured home and multi-family installations, due to lower average hot water use and the water heater in the majority of cases being installed in conditioned space, where cooling of the indoor environment and size and air flow requirements of HPWHs increase installation costs.

  6. Solar heating system

    DOE Patents [OSTI]

    Schreyer, James M.; Dorsey, George F.

    1982-01-01

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

  7. Improved solar heating systems

    DOE Patents [OSTI]

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

    1980-05-16

    An improved solar heating system is described in which the incident radiation of the sun is absorbed on collector panels, transferred to a storage unit and then distributed as heat for a building and the like. The improvement is obtained by utilizing a storage unit comprising separate compartments containing an array of materials having different melting points ranging from 75 to 180/sup 0/F. The materials in the storage system are melted in accordance with the amount of heat absorbed from the sun and then transferred to the storage system. An efficient low volume storage system is provided by utilizing the latent heat of fusion of the materials as they change states in storing ad releasing heat for distribution.

  8. 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.

  9. 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.

  10. 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.

  11. Heat rejection system

    DOE Patents [OSTI]

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

    1980-01-01

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

  12. Home Cooling Systems | Department of Energy

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

    Home Cooling Systems Home Cooling Systems When it comes to cooling your house, there are a number of options beyond air conditioning. | Photo courtesy of ©iStockphoto/chrisgramly. When it comes to cooling your house, there are a number of options beyond air conditioning. | Photo courtesy of ©iStockphoto/chrisgramly. Although your first thought for cooling may be air conditioning, there are many alternatives that provide cooling with less energy use. A combination of proper insulation,

  13. DOE to Sell 35,000 Barrels of Oil from the Northeast Home Heating Oil

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

    Reserve | Department of Energy Sell 35,000 Barrels of Oil from the Northeast Home Heating Oil Reserve DOE to Sell 35,000 Barrels of Oil from the Northeast Home Heating Oil Reserve May 24, 2007 - 4:16pm Addthis WASHINGTON, DC - The U.S. Department of Energy announced today that it will sell approximately 35,000 barrels of home heating oil from the Northeast Home Heating Oil Reserve (NEHHOR). The Reserve's current 5-year storage contracts expire on September 30, 2007 and market conditions have

  14. Retrofitting Combined Space and Water Heating Systems: Laboratory Tests

    SciTech Connect (OSTI)

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

    2012-10-01

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

  15. Retrofitting Combined Space and Water Heating Systems. Laboratory Tests

    SciTech Connect (OSTI)

    Schoenbauer, B.; Bohac, D.; Huelman, P.; Olsen, R.; Hewett, M.

    2012-10-01

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

  16. Ultra Low Sulfur Home Heating Oil Demonstration Project

    SciTech Connect (OSTI)

    Batey, John E.; McDonald, Roger

    2015-09-30

    This Ultra Low Sulfur (ULS) Home Heating Oil Demonstration Project was funded by the New York State Energy Research and Development Authority (NYSERDA) and has successfully quantified the environmental and economic benefits of switching to ULS (15 PPM sulfur) heating oil. It advances a prior field study of Low Sulfur (500 ppm sulfur) heating oil funded by NYSERDA and laboratory research conducted by Brookhaven National Laboratory (BNL) and Canadian researchers. The sulfur oxide and particulate matter (PM) emissions are greatly reduced as are boiler cleaning costs through extending cleaning intervals. Both the sulfur oxide and PM emission rates are directly related to the fuel oil sulfur content. The sulfur oxide and PM emission rates approach near-zero levels by switching heating equipment to ULS fuel oil, and these emissions become comparable to heating equipment fired by natural gas. This demonstration project included an in-depth review and analysis of service records for both the ULS and control groups to determine any difference in the service needs for the two groups. The detailed service records for both groups were collected and analyzed and the results were entered into two spreadsheets that enabled a quantitative side-by-side comparison of equipment service for the entire duration of the ULS test project. The service frequency for the ULS and control group were very similar and did indicate increased service frequency for the ULS group. In fact, the service frequency with the ULS group was slightly less (7.5 percent) than the control group. The only exception was that three burner fuel pump required replacement for the ULS group and none were required for the control group.

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

    Energy Savers [EERE]

    Heat Exchangers for Solar Water Heating Systems Heat Exchangers for Solar Water Heating Systems Image of a heat exchanger. | Photo from iStockphoto.com Image of a heat exchanger. |...

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

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

    more about energy-efficient furnaces and boilers. Addthis Related Articles Tips: Natural Gas and Oil Heating Systems Energy Saver Guide: Tips on Saving Money and Energy at Home...

  19. Fluidized bed heat treating system

    DOE Patents [OSTI]

    Ripley, Edward B; Pfennigwerth, Glenn L

    2014-05-06

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

  20. An In-Depth Look at Ground Source Heat Pumps and Other Electric Loads in Two GreenMax Homes

    SciTech Connect (OSTI)

    Puttagunta, Srikanth; Shapiro, Carl

    2012-04-01

    Building America research team Consortium for Advanced Residential Buildings (CARB) partnered with WPPI Energy to answer key research questions on in-field performance of ground-source heat pumps and lighting, appliance, and miscellaneous loads (LAMELs) through extensive field monitoring at two WPPI GreenMax demonstration homes in Wisconsin. These two test home evaluations provided valuable data on the true in-field performance of various building mechanical systems and LAMELs.

  1. #tipsEnergy: Saving on Home Heating Costs | Department of Energy

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

    Saving on Home Heating Costs #tipsEnergy: Saving on Home Heating Costs November 23, 2012 - 3:37pm Addthis Rebecca Matulka Rebecca Matulka Former Digital Communications Specialist, Office of Public Affairs #tipsEnergy: Saving on Home Heating Costs A feature on the Energy Department's Twitter account, #tipsEnergy highlights ways to save energy and money at home. Once a month, we ask you to share your energy-saving tips so the larger energy community can learn from you, and we feature some of the

  2. Carbon footprints of heating oil and LPG heating systems

    SciTech Connect (OSTI)

    Johnson, Eric P.

    2012-07-15

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

  3. Heat transport system

    DOE Patents [OSTI]

    Pierce, Bill L.

    1978-01-01

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

  4. Air heating system

    DOE Patents [OSTI]

    Primeau, John J.

    1983-03-01

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

  5. Heat Exchangers for Solar Water Heating Systems | Department of Energy

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

    Exchangers for Solar Water Heating Systems Heat Exchangers for Solar Water Heating Systems Image of a heat exchanger. | Photo from iStockphoto.com Image of a heat exchanger. | Photo from iStockphoto.com Solar water heating systems use heat exchangers to transfer solar energy absorbed in solar collectors to the liquid or air used to heat water or a space. Heat exchangers can be made of steel, copper, bronze, stainless steel, aluminum, or cast iron. Solar heating systems usually use copper,

  6. Air-To-Water Heat Pumps with Radiant Delivery in Low Load Homes: Tucson, Arizona and Chico, California (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-11-01

    Space conditioning represents nearly 50% of average residential household energy consumption, highlighting the need to identify alternative cost-effective, energy-efficient cooling and heating strategies. As homes are better built, there is an increasing need for strategies that are particularly well suited for high performance, low load homes. ARBI researchers worked with two test homes in hot-dry climates to evaluate the in-situ performance of air-to-water heat pump (AWHP) systems, an energy efficient space conditioning solution designed to cost-effectively provide comfort in homes with efficient, safe, and durable operation. Two monitoring projects of test houses in hot-dry climates were initiated in 2010 to test this system. Both systems were fully instrumented and have been monitored over one year to capture complete performance data over the cooling and heating seasons. Results are used to quantify energy savings, cost-effectiveness, and system performance using different operating modes and strategies. A calibrated TRNSYS model was developed and used to evaluate performance in various climate regions. This strategy is most effective in tight, insulated homes with high levels of thermal mass (i.e. exposed slab floors).

  7. Building America Best Practices Series, Volume 6: High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems

    SciTech Connect (OSTI)

    Baechler, Michael C.; Gilbride, Theresa L.; Ruiz, Kathleen A.; Steward, Heidi E.; Love, Pat M.

    2007-06-04

    This guide is was written by PNNL for the US Department of Energy's Building America program to provide information for residential production builders interested in building near zero energy homes. The guide provides indepth descriptions of various roof-top photovoltaic power generating systems for homes. The guide also provides extensive information on various designs of solar thermal water heating systems for homes. The guide also provides construction company owners and managers with an understanding of how solar technologies can be added to their homes in a way that is cost effective, practical, and marketable. Twelve case studies provide examples of production builders across the United States who are building energy-efficient homes with photovoltaic or solar water heating systems.

  8. HPXML: A Standardized Home Performance Data Sharing System - Building

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

    America Top Innovation | Department of Energy HPXML: A Standardized Home Performance Data Sharing System - Building America Top Innovation HPXML: A Standardized Home Performance Data Sharing System - Building America Top Innovation hpxml.png In the world of home energy analysis, a variety of software tools are available for compiling and evaluating home energy audit data. This means home performance companies need to be fluent in several reporting platforms that span multiple utility

  9. Technology Solutions Case Study: Air-To-Water Heat Pumps with Radiant Delivery in Low Load Homes, Tucson, Arizona and Chico, California

    SciTech Connect (OSTI)

    2013-11-01

    Space conditioning represents nearly 50% of average residential household energy consumption, highlighting the need to identify alternative cost-effective, energy-efficient cooling and heating strategies. As homes are better built, there is an increasing need for strategies that are particularly well suited for high performance, low load homes. ARBI researchers worked with two test homes in hot-dry climates to evaluate the in-situ performance of air-to-water heat pump (AWHP) systems, an energy efficient space conditioning solution designed to cost-effectively provide comfort in homes with efficient, safe, and durable operation. Both systems were fully instrumented and have been monitored over one year to capture complete performance data over the cooling and heating seasons. Results are used to quantify energy savings, cost-effectiveness, and system performance using different operating modes and strategies. This strategy is most effective in tight, insulated homes with high levels of thermal mass (i.e. exposed slab floors).

  10. Performance of a small underfed wood chip-fired stoker in a hot air-heated home

    SciTech Connect (OSTI)

    Schneider, M.H.

    1983-01-01

    The goal of the study was to provide space heat for a home using forest biomass presently not in demand by industry, and by using a convenient, automatic, low-emission heating system. A stoker firing wood chips was installed in a home, and chips were prepared for it from the residues of a softwood clearcut. Residues from 1 and a quarter acre provided enough fuel to heat the house for the heating season. The chip-fired heating system was convenient, maintained the house at whatever temperature was set on the room thermostat, and generated little creosote or wood smoke. It was better at converting fuel to heat than the previous combustion heating systems in the house, with steady-state combustion efficiency of approximately 75% and longer-term appliance efficiency of 69%. Electric energy required for heating hot water was reduced approximately 27% as a result of a preheating coil located in the chip-fired furnace. The major cause of heat interruptions was jamming of the stoker which occurred on the average of every 18 and a half days. Clearing such jams was simple. The system operated safely throughout the test period.

  11. Technology Solutions for New Homes Case Study: Indirect Solar...

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

    Indirect Solar Water Heating Systems in Single-Family Homes Technology Solutions for New Homes Case Study: Indirect Solar Water Heating Systems in Single-Family Homes In 2011, ...

  12. [Waste water heat recovery system

    SciTech Connect (OSTI)

    Not Available

    1993-04-28

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

  13. Home Energy Management System - Stochastic Optimal Scheduling of

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

    Department of Energy Home Energy Audits Can Help You Keep That New Year's Resolution Home Energy Audits Can Help You Keep That New Year's Resolution January 3, 2013 - 8:25am Addthis Blower door test during a home energy audit. | Holtkamp Heating & A/C, Inc. Blower door test during a home energy audit. | Holtkamp Heating & A/C, Inc. Jason Lutterman Communications Specialist, Office of Energy Efficiency and Renewable Energy How does it work? You can save energy and money this year by

  14. Building America Whole-House Solutions for New Homes: Testing Ductless Heat

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

    Pumps in High-Performance Affordable Housing, The Woods at Golden Given, Tacoma,Washington | Department of Energy Testing Ductless Heat Pumps in High-Performance Affordable Housing, The Woods at Golden Given, Tacoma,Washington Building America Whole-House Solutions for New Homes: Testing Ductless Heat Pumps in High-Performance Affordable Housing, The Woods at Golden Given, Tacoma,Washington The Woods is a 30-home, high- performance, energy efficient sustainable community built by Habitat for

  15. DOE Zero Energy Ready Home Case Study, Weiss Building & Development, LLC., System Home, River Forest, Illinois

    SciTech Connect (OSTI)

    none,

    2013-09-01

    The Passive House Challenge Home located in River Forest, Illinois, is a 5-bedroom, 4.5-bath, 3,600 ft2 two-story home (plus basement) that costs about $237 less per month to operate than a similar sized home built to the 2009 IECC. For a home with no solar photovoltaic panels installed, it scored an amazingly low 27 on the Home Energy Rating System (HERS) score.An ENERGY STAR-rated dishwasher, clothes washer, and refrigerator; an induction cooktop, condensing clothes dryer, and LED lighting are among the energy-saving devices inside the home. All plumbing fixtures comply with EPA WaterSense criteria. The home was awarded a 2013 Housing Innovation Award in the "systems builder" category.

  16. Central Multifamily Water Heating Systems

    Broader source: Energy.gov [DOE]

    The Building America Program is hosting a no-cost, webinar-based training on Central Multifamily Water Heating Systems. The webinar will focus the effective use of central heat pump water heaters...

  17. 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.

  18. Webinar: ENERGY STAR Hot Water Systems for High Performance Homes...

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

    2011 providing informationprovide information about how to achieve energy savings from solar water heating, electric dedicated heat pump water heating, and gas tankless systems. ...

  19. Building America Case study: Advanced Controls Improve Performance of Combination Space and Water Heating Systems, Minneapolis, Minnesota (Fact Sheet), Technology Solutions for New and Existing Homes, Energy Efficiency & Renewable Energy (EERE)

    Energy Savers [EERE]

    Controls Improve Performance of Combination Space- and Water-Heating Systems Minneapolis, Minnesota PROJECT INFORMATION Combined Space and Water Heating: Next Steps to Improved Performance Location: Minneapolis, MN Partners: University of Minnesota and The Energy Conservatory Center for Energy and Environment, mncee.org NorthernSTAR Building America Partnership Building Component: Space conditioning and water heating Application: New and retrofit; single-family Year Tested: 2011-2014 Applicable

  20. Home Cooling Systems | Department of Energy

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

    Fans In many climates, you can use a whole-house fan to meet all or most of your home cooling needs. Evaporative Cooling For homes in dry climates, evaporative cooling or...

  1. Measure Guideline: Selecting Ventilation Systems for Existing Homes

    SciTech Connect (OSTI)

    Aldrich, R.

    2014-02-01

    This document addresses adding -or improving - mechanical ventilation systems to existing homes. The purpose of ventilation is to remove contaminants from homes, and this report discusses where, when, and how much ventilation is appropriate in a home, including some discussion of relevant codes and standards. Advantages, disadvantages, and approximate costs of various system types are presented along with general guidelines for implementing the systems in homes. CARB intends for this document to be useful to decision makers and contractors implementing ventilation systems in homes. Choosing the "best" system is not always straightforward; selecting a system involves balancing performance, efficiency, cost, required maintenance, and several other factors. It is the intent of this document to assist contractors in making more informed decisions when selecting systems. Ventilation is an integral part of a high-performance home. With more air-sealed envelopes, a mechanical means of removing contaminants is critical for indoor environmental quality and building durability.

  2. Stirling engine heating system

    SciTech Connect (OSTI)

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

    1988-06-28

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

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

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

    Department of Energy Everything You Wanted to Know About Solar Water Heating Systems Everything You Wanted to Know About Solar Water Heating Systems October 7, 2014 - 2:39pm Q&A What do you want to know about solar at home? Tell Us Addthis Solar panels heat water that is delivered to a storage tank. | Photo courtesy of David Springer, National Renewable Energy Laboratory Solar panels heat water that is delivered to a storage tank. | Photo courtesy of David Springer, National Renewable

  4. Building America Whole-House Solutions for New Homes: Testing...

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

    the energy performance of these homes and the ductless heat pumps (DHP) they employ. ... measures that focus on the DHPhybrid heating system and heat recovery ...

  5. Installing and Maintaining a Home Solar Electric System | Department...

    Energy Savers [EERE]

    Making sure your home solar electric or photovoltaic (PV) system is sized, sited, installed, and maintained correctly is essential for maximizing its energy performance. When...

  6. Building America Case Studies for Existing Homes: Supplemental Ductless Mini-Split Heat Pump in the Hot-Humid Climate

    Broader source: Energy.gov [DOE]

    The Building America Partnership for Improved Residential Construction team that studied the effects of mini-split heat pumps in six central Florida homes.

  7. Building America Case Study: Calculating Design Heating Loads for Superinsulated Buildings, Ithaca, New York; Technology Solutions for New and Existing Homes, Energy Efficiency & Renewable Energy (EERE)

    SciTech Connect (OSTI)

    2015-08-01

    Designing a superinsulated home has many benefits including improved comfort, reduced exterior noise penetration, lower energy bills, and the ability to withstand power and fuel outages under much more comfortable conditions than a typical home. Extremely low heating and cooling loads equate to much smaller HVAC equipment than conventionally required. Sizing the mechanical system to these much lower loads reduces first costs and the size of the distribution system needed. While these homes aren't necessarily constructed with excessive mass in the form of concrete floors and walls, the amount of insulation and the increase in the thickness of the building envelope can lead to a mass effect, resulting in the structures ability to store much more heat than a code built home. This results in a very low thermal inertia making the building much less sensitive to drastic temperature swings thereby decreasing the peak heating load demand. Alternative methods that take this inertia into account along with solar and internal gains result in smaller more appropriate design loads than those calculated using Manual J version 8. During the winter of 2013/2014, CARB monitored the energy use of three homes in climate zone 6 in an attempt to evaluate the accuracy of two different mechanical system sizing methods for low load homes. Based on the results, it is recommended that internal and solar gains be included and some credit for thermal inertia be used in sizing calculations for superinsulated homes.

  8. Measure Guideline: Heat Pump Water Heaters in New and Existing Homes

    SciTech Connect (OSTI)

    Shapiro, C.; Puttagunta, S.; Owens, D.

    2012-02-01

    This Building America Measure Guideline is intended for builders, contractors, homeowners, and policy-makers. This document is intended to explore the issues surrounding heat pump water heaters (HPWHs) to ensure that homeowners and contractors have the tools needed to appropriately and efficiently install HPWHs. Heat pump water heaters (HPWHs) promise to significantly reduce energy consumption for domestic hot water (DHW) over standard electric resistance water heaters (ERWHs). While ERWHs perform with energy factors (EFs) around 0.9, new HPWHs boast EFs upwards of 2.0. High energy factors in HPWHs are achieved by combining a vapor compression system, which extracts heat from the surrounding air at high efficiencies, with electric resistance element(s), which are better suited to meet large hot water demands. Swapping ERWHs with HPWHs could result in roughly 50% reduction in water heating energy consumption for 35.6% of all U.S. households. This Building America Measure Guideline is intended for builders, contractors, homeowners, and policy-makers. While HPWHs promise to significantly reduce energy use for DHW, proper installation, selection, and maintenance of HPWHs is required to ensure high operating efficiency and reliability. This document is intended to explore the issues surrounding HPWHs to ensure that homeowners and contractors have the tools needed to appropriately and efficiently install HPWHs. Section 1 of this guideline provides a brief description of HPWHs and their operation. Section 2 highlights the cost and energy savings of HPWHs as well as the variables that affect HPWH performance, reliability, and efficiency. Section 3 gives guidelines for proper installation and maintenance of HPWHs, selection criteria for locating HPWHs, and highlights of important differences between ERWH and HPWH installations. Throughout this document, CARB has included results from the evaluation of 14 heat pump water heaters (including three recently released HPWH products) installed in existing homes in the northeast region of the United States.

  9. Heat transport system

    DOE Patents [OSTI]

    Harkness, Samuel D.

    1982-01-01

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

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

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

    from iStockphoto.com Image of a heat exchanger. | Photo from iStockphoto.com Solar water heating systems use heat exchangers to transfer solar energy absorbed in solar...

  11. Waste Heat Management Options: Industrial Process Heating Systems

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

    Heat Management Options Industrial Process Heating Systems By Dr. Arvind C. Thekdi E-mail: athekdi@e3minc.com E3M, Inc. August 20, 2009 2 Source of Waste Heat in Industries * Steam ...

  12. Boise geothermal district heating system

    SciTech Connect (OSTI)

    Hanson, P.J.

    1985-10-01

    This document describes the Boise geothermal district heating project from preliminary feasibility studies completed in 1979 to a fully operational system by 1983. The report includes information about the two local governments that participated in the project - the City of Boise, Idaho and the Boise Warm Springs Water District. It also discusses the federal funding sources; the financial studies; the feasibility studies conducted; the general system planning and design; design of detailed system components; the legal issues involved in production; geological analysis of the resource area; distribution and disposal; the program to market system services; and the methods of retrofitting buildings to use geothermal hot water for space heating. Technically this report describes the Boise City district heating system based on 170/sup 0/F water, a 4000 gpm production system, a 41,000 foot pipeline system, and system economies. Comparable data are also provided for the Boise Warm Springs Water District. 62 figs., 31 tabs.

  13. Heat Distribution Systems | Department of Energy

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

    Forced-air systems use ducts that can also be used for central air conditioning and heat pump systems. Radiant heating systems also have unique heat distribution systems. That...

  14. DOE Will Convert Northeast Home Heating Oil Reserve to Ultra Low Sulfur Distillate

    Broader source: Energy.gov [DOE]

    The current inventory of the Northeast Home Heating Oil Reserve will be converted to cleaner burning ultra low sulfur distillate to comply with new, more stringent fuel standards by some Northeastern states, the U.S. Department of Energy said today.

  15. DOE Seeks Commercial Storage to Complete Fill of Northeast Home Heating Oil Reserve

    Broader source: Energy.gov [DOE]

    The Department of Energy, through its agent DLA Energy, has issued a solicitation seeking commercial storage contracts for the remaining 350,000 barrels of ultra low sulfur distillate needed to complete the fill of the Northeast Home Heating Oil Reserve.

  16. Home Energy Management Systems and Reduced Consumption

    Office of Energy Efficiency and Renewable Energy (EERE)

    This presentation was given at the Summer 2012 DOE Building America meeting on July 25, 2012, and addressed the question "What emerging innovations are the key to future homes?"

  17. Evaluating Ventilation Systems for Existing Homes

    SciTech Connect (OSTI)

    Aldrich, R.; Arena, L.

    2013-02-01

    During the course of this project, an affordable and high performance ductwork system to directly address the problems of thermal losses, poor efficiency, and air leakage was designed. To save space and enable direct connections between different floors of the building, the ductwork system was designed in such a way that it occupied interior or exterior frame wall cavities. The ductwork system satisfied building regulations for structural support when bridging multiple floors, the spread of fire and smoke, and insulation to reduce the heat flow into or out of the building. Retrofits of urban residential buildings will be the main focus for the application of this ductwork system. Highly reflective foils and insulating materials were used to aid in the increase of the overall R-value of the ductwork itself and the wall assembly. It is expected that the proposed system will increase the efficiency of the HVAC system and the thermal resistance of the building envelope. The performance of the proposed ductwork design was numerically evaluated in a number of different ways. Our results indicate that the duct method is a very cost attractive alternative to the conventional method.

  18. Liability aspects of home energy-rating systems

    SciTech Connect (OSTI)

    Hendrickson, P.L.

    1983-10-01

    Liability aspects of home energy rating systems are discussed. An introduction to the rating system concept, including types of rating systems, implementation efforts to date, and possible groups to conduct ratings, is also included. The home energy rating system concept involves the periodic rating of the energy efficiency of residential buildings. The rating can provide a relative indication of a home's energy efficiency and also a quantitative estimate of consumption, fuel cost, or both. Primary attention is given to liability issues associated with developing and performing ratings. Secondary attention is given to possible liability associated with misuse of a rating once it has been performed.

  19. Installing and Maintaining a Home Solar Electric System | Department of

    Energy Savers [EERE]

    Energy Installing and Maintaining a Home Solar Electric System Installing and Maintaining a Home Solar Electric System When choosing a contractor, ask about their work record, experience, and licenses, and get more than one bid for the installation of your PV system. | Photo courtesy of Dennis Schroeder, NREL. When choosing a contractor, ask about their work record, experience, and licenses, and get more than one bid for the installation of your PV system. | Photo courtesy of Dennis

  20. Installing and Maintaining a Home Solar Electric System | Department of

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

    Energy Home Solar Electric System Installing and Maintaining a Home Solar Electric System When choosing a contractor, ask about their work record, experience, and licenses, and get more than one bid for the installation of your PV system. | Photo courtesy of Dennis Schroeder, NREL. When choosing a contractor, ask about their work record, experience, and licenses, and get more than one bid for the installation of your PV system. | Photo courtesy of Dennis Schroeder, NREL. Making sure your

  1. Performance of Integrated Hydronic Heating Systems.

    SciTech Connect (OSTI)

    BUTCHER,T.A.

    2007-12-20

    A variety of system configurations are used in North America to meet the heating and domestic hot water needs of single-family homes. This includes, for example: warm air furnaces with electric water heaters; boilers with integrated hot water coils; and boilers with 'indirect' hot water storage tanks. Integrated hydronic systems which provide both heat and hot water are more popular only in the Northeast and mid-Atlantic regions. For those making decisions about configurations of these integrated hydronic systems, including control options, little information is available concerning the annual energy cost implications of these decisions. This report presents results of a project to use a direct load emulation approach to measure the performance of hydronic systems, develop performance curves, and to provide decision tools to consumers. This is a laboratory measurement system involving direct energy input and output measurements under different load patterns. These results are then used to develop performance correlations for specific systems that can be used to predict energy use in specific applications. A wide range of system types have been tested under this project including conventional boilers with 'tankless' internal coils for domestic hot water production, boilers with indirect external storage tanks, tank type water heaters which may also be used for space heating, condensing oil- and gas-fired systems, and systems with custom control features. It is shown that low load and idle energy losses can have a very large impact on the total annual energy use and that the potential energy savings associated with replacing old equipment with newer, high efficiency equipment with low losses at idle or low load can be in the 25% range. These savings are larger than simple combustion efficiency measurements would indicate.

  2. Passive Solar Home Design | Department of Energy

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

    Design » Design for Efficiency » Passive Solar Home Design Passive Solar Home Design This North Carolina home gets most of its space heating from the passive solar design, but the solar thermal system (top of roof) supplies both domestic hot water and a secondary radiant floor heating system. | Photo courtesy of Jim Schmid Photography. This North Carolina home gets most of its space heating from the passive solar design, but the solar thermal system (top of roof) supplies both domestic hot

  3. Overall U-values and heating/cooling loads: Manufactured homes

    SciTech Connect (OSTI)

    Conner, C.C.; Taylor, Z.T.

    1992-02-01

    This manual specifies a method for calculating the overall thermal transmittance (also referred to as the overall U-value or U{sub o}), heating load, and cooling load of a manufactured (mobile) home. Rules, examples, and data required by the method are also presented. Compliance with the Department of Housing and Urban Development`s (HUD) U{sub o} and load calculation regulations contained in Sections 3280.506, 3280.510 and 3280.511 of the Manufactured Home Construction and Safety Standards must be demonstrated through the application of the method provided herein.

  4. Quality Management Systems for Zero Energy Ready Home Webinar (Text

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

    Version) | Department of Energy Quality Management Systems for Zero Energy Ready Home Webinar (Text Version) Quality Management Systems for Zero Energy Ready Home Webinar (Text Version) Below is the text version of the webinar, Quality Management Systems for Zero Energy Ready Home, presented in October 2014. Watch the presentation. GoToWebinar voice: The broadcast is now starting. All attendees are in listen-only mode. Lindsay Parker: Hi, everyone. We're really glad that you can make it here

  5. 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.

  6. 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.

  7. Meeting Minutes from Automated Home Energy Management System Expert Meeting

    Energy Savers [EERE]

    Automated Home Energy Management System Expert Meeting October 1-2, 2009 AGENDA - Day 1 8:30 - 8:45 Welcome and Debriefing of Building America and Home Energy Management Research- Lew Pratsch, DOE 8:45 - 9:15 Utilities Trends- Smart Grid Projects and Integration With Home Controls - Mike Keesee, SMUD 9:15 - 9:45 Thoughts on Controls System Performance Requirements - Rich Brown, LBL 9:45 - 10:15 Efficiency Trends in Consumer Electronics - Kurtis McKenney, TIAX 10:15 - 10:30 Session Break 10:30 -

  8. Planning a Home Solar Electric System | Department of Energy

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

    The economics of a home solar electric or PV system are determined by both the capital and operating costs. Capital costs include the initial costs of designing and installing a PV ...

  9. Installing and Maintaining a Home Solar Electric System | Department...

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

    a Home Solar Electric System When choosing a contractor, ask about their work record, experience, and licenses, and get more than one bid for the installation of your PV...

  10. Measure Guideline: Selecting Ventilation Systems for Existing Homes

    SciTech Connect (OSTI)

    Aldrich, R.

    2014-02-01

    This report, developed by Building America research team CARB, addresses adding or improving mechanical ventilation systems to existing homes. The goal of this report is to assist decision makers and contractors in making informed decisions when selecting ventilation systems for homes. With more air-sealed envelopes, a mechanical means of removing contaminants is critical for indoor environmental quality and building durability. The purpose of ventilation is to remove contaminants from homes, and this report discusses where, when, and how much ventilation is appropriate in a home, including examination of relevant codes and standards. Choosing the "best" system is not always straightforward; selecting a system involves balancing performance, efficiency, cost, required maintenance, and several other factors.

  11. Planning a Home Solar Electric System | Department of Energy

    Office of Environmental Management (EM)

    ... whole-house system design -- an approach for building an energy-efficient home. ... number to your annual electricity usage (called demand) to get an idea of how much you will save. ...

  12. 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

  13. Building America Technology Solutions for New and Existing Homes: Ground Source Heat Pump Research, TaC Studios Residence, Atlanta, Georigia (Fact Sheet),

    Office of Energy Efficiency and Renewable Energy (EERE)

    This case study describes the construction of a new test home in Atlanta, GA, that demonstrates current best practices for the mixed-humid climate, including a building envelope featuring advanced air sealing details and low density spray foam insulation, glazing that exceeds ENERGY STAR requirements, and a high performance heating and cooling system.

  14. Building America Technology Solutions for New and Existing Homes: Long-Term Monitoring of Mini-Split Ductless Heat Pumps in the Northeast, Devens and Easthampton, Massachusetts

    Broader source: Energy.gov [DOE]

    In this project, Building Science Corporation evaluated the long-term performance of mini-split heat pumps (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.

  15. Active Solar Heating | Department of Energy

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

    Heat & Cool » Home Heating Systems » Active Solar Heating Active Solar Heating This North Carolina home gets most of its space heating from the passive solar design, but the solar thermal system supplies both domestic hot water and a secondary radiant floor heating system. | Photo courtesy of Jim Schmid Photography, NREL This North Carolina home gets most of its space heating from the passive solar design, but the solar thermal system supplies both domestic hot water and a secondary

  16. Active Solar Heating | Department of Energy

    Energy Savers [EERE]

    Home Heating Systems » Active Solar Heating Active Solar Heating This North Carolina home gets most of its space heating from the passive solar design, but the solar thermal system supplies both domestic hot water and a secondary radiant floor heating system. | Photo courtesy of Jim Schmid Photography, NREL This North Carolina home gets most of its space heating from the passive solar design, but the solar thermal system supplies both domestic hot water and a secondary radiant floor heating

  17. DOE Zero Energy Ready Home Case Study: Clifton View Homes, Coupeville, WA,

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

    Systems Home | Department of Energy Coupeville, WA, Systems Home DOE Zero Energy Ready Home Case Study: Clifton View Homes, Coupeville, WA, Systems Home Case study of a DOE Zero Energy Ready Home on Whidbey Island, WA, that scored HERS 45 without PV. This 2,908-square-foot custom/system home has a SIP roof and walls, R-20 rigid foam under slab, triple-pane windows, ground source heat pump for radiant floor heat, and a unique balanced ventilation system using separate exhaust fans to bring

  18. Waste Heat Utilization System Property Tax Exemption

    Broader source: Energy.gov [DOE]

    Waste heat utilization systems arefacilities and equipment for the recovery of waste heat generated in the process of generating electricity and the use of such heat to generate additional elect...

  19. 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.

  20. 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.

  1. 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)

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

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

    Multifamily Central Heat Pump Water Heating Building America Webinar: Central Multifamily Water Heating Systems - Multifamily Central Heat Pump Water Heating This presentation will ...

  3. 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,

  4. Lighting system with heat distribution face plate

    DOE Patents [OSTI]

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

    2013-09-10

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

  5. NREL: Wind Research - Systems Engineering Home Page

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

    Systems Engineering Wind Research The National Wind Technology Center (NWTC) wind energy systems engineering initiative has developed an analysis platform to leverage its research capabilities toward integrating wind energy engineering and cost models across wind plants. This platform captures the important interactions between various subsystems to achieve a better understanding of how to improve system-level performance and achieve system-level cost reductions. The initiative's goal is to

  6. Training: Process Heating Systems | Department of Energy

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

    Process Heating Systems Training: Process Heating Systems April 16, 2014 - 6:31pm Addthis Learn about the diverse training sessions offered. The courses are taught by highly qualified instructors who have met rigorous standards. View additional process heating system resources. Process Heating Assessment and Survey Tool Training - 2-hour webcast Availability: Online webcast Now, in addition to full-day training sessions, AMO offers a convenient, introductory, two-hour webcast on the use of the

  7. Heat engine generator control system

    DOE Patents [OSTI]

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

    1998-01-01

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

  8. Heat engine generator control system

    DOE Patents [OSTI]

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

    1998-05-12

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

  9. Heating System Modernization, Management of Peripheral Scope...

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

    System Modernization, Management of Peripheral Scope Lessons Learned Report, NNSA, Dec 2010 Heating System Modernization, Management of Peripheral Scope Lessons Learned Report,...

  10. DOE Zero Energy Ready Home Case Study, Nexus EnergyHomes, Frederick, MD,

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

    Production | Department of Energy Study, Nexus EnergyHomes, Frederick, MD, Production DOE Zero Energy Ready Home Case Study, Nexus EnergyHomes, Frederick, MD, Production This urban infill community features a package of SIP walls, geothermal heat pumps, solar PV, and a proprietary energy management system. PDF icon Nexus EnergyHomes - Frederick, MD More Documents & Publications Building America Whole-House Solutions for New Homes: Nexus EnergyHomes - Frederick, Maryland DOE Zero Energy

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

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

    Solar Water Heaters » Heat Transfer Fluids for Solar Water Heating Systems Heat Transfer Fluids for Solar Water Heating Systems Illustration of a solar water heater. Illustration of a solar water heater. Heat-transfer fluids carry heat through solar collectors and a heat exchanger to the heat storage tanks in solar water heating systems. When selecting a heat-transfer fluid, you and your solar heating contractor should consider the following criteria: Coefficient of expansion - the fractional

  12. 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.

  13. Save Energy Now in Your Process Heating Systems; Industrial Technologi...

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

    fossil fuels and biomass; electric systems; and heat ... improve your plant's bottom line. * Many improvements ... Heat Losses Heat Losses Heat Transfer Advanced Materials ...

  14. Heat recovery anti-icing system

    SciTech Connect (OSTI)

    Cummins, J.R.

    1982-05-11

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

  15. Waste Heat Recapture from Supermarket Refrigeration Systems

    SciTech Connect (OSTI)

    Fricke, Brian A

    2011-11-01

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

  16. Heat transport system, method and material

    DOE Patents [OSTI]

    Musinski, Donald L.

    1987-01-01

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

  17. Heat transfer analysis in Stirling engine heat input system

    SciTech Connect (OSTI)

    Chung, W.; Kim, S.

    1995-12-31

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

  18. Industrial Steam System Heat-Transfer Solutions

    Broader source: Energy.gov [DOE]

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

  19. Table 26. Natural gas home customer-weighted heating degree days

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

    96 Created on: 4/26/2016 6:14:01 PM Table 26. Natural gas home customer-weighted heating degree days Month/Year/Type of data New England Middle Atlantic East North Central West North Central South Atlantic CT, ME, MA, NH, RI, VT NJ, NY, PA IL, IN, MI, OH, WI IA, KS, MN, MO, ND, NE, SD DE, FL, GA, MD, DC, NC, SC, VA, WV November Normal 702 665 757 841 443 2014 749 742 909 1,002 562 2015 583 509 596 653 325 % Diff (normal to 2015) -17.0 -23.5 -21.3 -22.4 -26.6 % Diff (2014 to 2015) -22.2 -31.4

  20. Shape memory alloy heat engines and energy harvesting systems...

    Office of Scientific and Technical Information (OSTI)

    Data Explorer Search Results Shape memory alloy heat engines and energy harvesting systems Title: Shape memory alloy heat engines and energy harvesting systems A heat engine ...

  1. Shape memory alloy heat engines and energy harvesting systems...

    Office of Scientific and Technical Information (OSTI)

    Shape memory alloy heat engines and energy harvesting systems Title: Shape memory alloy heat engines and energy harvesting systems A heat engine includes a first rotatable pulley ...

  2. Residential Photovoltaic Energy Systems in California: The Effect on Home Sales Prices

    SciTech Connect (OSTI)

    Hoen, Ben; Wiser, Ryan; Thayer, Mark; Cappers, Peter

    2012-04-15

    Relatively little research exists estimating the marginal impacts of photovoltaic (PV) energy systems on home sale prices. Using a large dataset of California homes that sold from 2000 through mid-2009, we find strong evidence, despite a variety of robustness checks, that existing homes with PV systems sold for a premium over comparable homes without PV systems, implying a near full return on investment. Premiums for new homes are found to be considerably lower than those for existing homes, implying, potentially, a tradeoff between price and sales velocity. The results have significant implications for homeowners, builders, appraisers, lenders, and policymakers.

  3. Home

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

    IQ Station Boise State University receives a portable 3D visualization system from CAES and INL More BSU Photo of the Week INL's Shane Grover drives the IQ Station...

  4. The evaluation of a 4000-home geothermal heat pump retrofit at Fort Polk, Louisiana: Final Report

    SciTech Connect (OSTI)

    Hughes, P.J.; Shonder, J.A.

    1998-03-01

    This report documents an independent evaluation of an energy retrofit of 4,003 family housing units at Fort Polk, Louisiana, under an energy savings performance contract (ESPC). Replacement of the heating, cooling, and water heating systems in these housing units with geothermal heat pumps (GHPs) anchored the retrofit; low-flow shower heads and compact fluorescent lighting were also installed, as well as attic insulation where needed. Statistically valid findings indicate that the project will save 25.8 million kWh, or 32.5% of the pre-retrofit whole-community electrical consumption, and 100% of the whole-community natural gas previously used for space conditioning and water heating (260,000 therms) in a typical meteorological year. At the end-use level, the GHPs were found to save about 42% of the pre-retrofit electrical consumption for heating, cooling, and water heating in housing units that were all-electric in the pre-retrofit period. This report also demonstrates an improved method of predicting energy savings. Using an engineering model calibrated to pre-retrofit energy use data collected in the field, the method predicted actual energy savings on one of the electric feeders at Fort Polk with a very high degree of accuracy. The accuracy of this model was in turn dependent on data-calibrated models of the geothermal heat pump and ground heat exchanger that are described in this report. In addition this report documents the status of vertical borehole ground heat exchanger (BHEx) design methods at the time this project was designed, and demonstrates methods of using data collected from operating GHP systems to benchmark BHEx design methods against a detailed engineering model calibrated to date. The authors also discuss the ESPC`s structure and implementation and how the experience gained here can contribute to the success of future ESPCs.

  5. DOE Zero Energy Ready Home Case Study: M Street Homes, Houston, TX |

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

    Department of Energy M Street Homes, Houston, TX DOE Zero Energy Ready Home Case Study: M Street Homes, Houston, TX DOE Zero Energy Ready Home Case Study: M Street Homes, Houston, TX Case study of a DOE Zero Energy Ready home in Houston, TX, that achieves a HERS 45 without PV or HERS 32 with 1.2 kW PV. The three-story, 4,507-ft2 custom home is powered by a unique tri-generation system that supplies all of the home's electricity, heating, and cooling on site. The tri-generator is powered by a

  6. Heat exchanger with auxiliary cooling system

    DOE Patents [OSTI]

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

    1980-01-01

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

  7. Rankine cycle waste heat recovery system

    SciTech Connect (OSTI)

    Ernst, Timothy C.; Nelson, Christopher R.

    2015-09-22

    A waste heat recovery (WHR) system connects a working fluid to fluid passages formed in an engine block and/or a cylinder head of an internal combustion engine, forming an engine heat exchanger. The fluid passages are formed near high temperature areas of the engine, subjecting the working fluid to sufficient heat energy to vaporize the working fluid while the working fluid advantageously cools the engine block and/or cylinder head, improving fuel efficiency. The location of the engine heat exchanger downstream from an EGR boiler and upstream from an exhaust heat exchanger provides an optimal position of the engine heat exchanger with respect to the thermodynamic cycle of the WHR system, giving priority to cooling of EGR gas. The configuration of valves in the WHR system provides the ability to select a plurality of parallel flow paths for optimal operation.

  8. Energy-Efficient Home Design | Department of Energy

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

    Design » Energy-Efficient Home Design Energy-Efficient Home Design The Home Energy Score is a national rating system developed by the U.S. Department of Energy. The Score reflects the energy efficiency of a home based on the home's structure and heating, cooling, and hot water systems. The Home Facts provide details about the current structure and systems. Recommendations show how to improve the energy efficiency of the home to achieve a higher score and save money. The Home Energy Score is a

  9. DOE ZERH Webinar: Quality Management Systems for Zero Energy Ready Home |

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

    Department of Energy Quality Management Systems for Zero Energy Ready Home DOE ZERH Webinar: Quality Management Systems for Zero Energy Ready Home The session will provide background and guidance for how Zero Energy Ready Home builders can integrate a quality management program in their business. The focus will be on facilitating builder transition to high-performance homes, minimizing builder risk during that transition, and ensuring consistent delivery on the HPH value proposition. The

  10. Systems Engineering Saves Energy in Southwest, Pulte Homes--Tucson, Arizona

    SciTech Connect (OSTI)

    2002-02-01

    Houses being built in Tucson, Arizona, by Pulte Homes are part of the U.S. Department of Energy Building America program. These homes reduce electric air-conditioning bill and gas-heating bills by 30-50% relative to the 1995 Model Energy Code.

  11. Heat transport system, method and material

    DOE Patents [OSTI]

    Musinski, D.L.

    1987-04-28

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

  12. 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.

  13. 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.

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

    Energy Savers [EERE]

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

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

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

    Illustration of a solar water heater. Illustration of a solar water heater. Heat-transfer fluids carry heat through solar collectors and a heat exchanger to the heat storage tanks...

  16. Rankine cycle waste heat recovery system

    DOE Patents [OSTI]

    Ernst, Timothy C.; Nelson, Christopher R.

    2014-08-12

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

  17. Rankine cycle waste heat recovery system

    DOE Patents [OSTI]

    Ernst, Timothy C.; Nelson, Christopher R.

    2016-05-10

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

  18. Heat Pump Systems | Department of Energy

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

    The combustion fuel half of the system could be propane, natural gas, oil, or even coal and wood. In comparison with a combustion fuel-fired furnace or standard heat pump...

  19. HPXML: A Standardized Home Performance Data Sharing System -...

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

    the world of home energy analysis, a variety of software ... This means home performance companies need to be fluent in ... an extensible mark-up language (XML) protocol that can ...

  20. Building America Case Study: Selecting Ventilation Systems for Existing Homes (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-12-01

    This document addresses adding -or improving - mechanical ventilation systems to existing homes. The purpose of ventilation is to remove contaminants from homes, and this report discusses where, when, and how much ventilation is appropriate in a home, including some discussion of relevant codes and standards. Advantages, disadvantages, and approximate costs of various system types are presented along with general guidelines for implementing the systems in homes. CARB intends for this document to be useful to decision makers and contractors implementing ventilation systems in homes. Choosing the "best" system is not always straightforward; selecting a system involves balancing performance, efficiency, cost, required maintenance, and several other factors. It is the intent of this document to assist contractors in making more informed decisions when selecting systems. Ventilation is an integral part of a high-performance home. With more air-sealed envelopes, a mechanical means of removing contaminants is critical for indoor environmental quality and building durability.

  1. Home Performance with Energy Star. Which Measures Get You 30% Savings?

    Energy Savers [EERE]

    America | Department of Energy Home Improvement Catalyst: Bringing Energy Efficiency to More Homes Across America Home Improvement Catalyst: Bringing Energy Efficiency to More Homes Across America March 31, 2016 - 12:41pm Addthis Home Improvement Catalyst: Bringing Energy Efficiency to More Homes Across America The home improvement market represents $150 billion in annual investment, with more than 14 million projects that involve replacement or upgrades of heating and cooling systems,

  2. In situ heat treatment process utilizing a closed loop heating system

    DOE Patents [OSTI]

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

    2010-12-07

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

  3. Effects on carbon monoxide levels in mobile homes using unvented kerosene heaters for residential heating

    SciTech Connect (OSTI)

    Williams, R.; Walsh, D.; White, J.; Jackson, M.; Mumford, J.

    1992-01-01

    Carbon monoxide (CO) emission levels were continuously monitored in 8 mobile trailer homes less than 10 years old. These homes were monitored in an US EPA study on indoor air quality as affected by unvented portable kerosene heaters. Respondents were asked to operate their heaters in a normal fashion. CO, air exchange and temperature values were measured during the study in each home. Results indicate that consumers using unvented kerosene heaters may be unknowingly exposed to high CO levels without taking proper precautions.

  4. Methodology for the evaluation of a 4000-home geothermal heat pump retrofit at Fort Polk, Louisiana

    SciTech Connect (OSTI)

    Hughes, P.J.; Shonder, J.A.; White, D.L.; Huang, H.L.

    1998-03-01

    The US Army and a private energy service company are developing a comprehensive energy efficiency project to upgrade the family housing at Fort Polk, Louisiana. The project includes converting the space conditioning systems of more than 4,000 housing units to geothermal (or ground-source) heat pumps (GHPs). This interim report describes the methodology of the evaluation associated with this project, including the field monitoring that has been conducted at the base.

  5. Home Cooling | Department of Energy

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

    Cooling Home Cooling Energy Saver 101 Energy Saver 101 We're covering everything you need to know about home cooling to help you save energy and money. Read more Ventilation Systems for Cooling Ventilation Systems for Cooling Learn how to avoid heat buildup and keep your home cool with ventilation. Read more Cooling with a Whole House Fan Cooling with a Whole House Fan A whole-house fan, in combination with other cooling systems, can meet all or most of your home cooling needs year round. Read

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

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

    Controls Improve Performance of Combination Space- and Water-Heating Systems Building America Technology Solutions for New and Existing Homes: Advanced Controls Improve Performance ...

  7. Building America Whole-House Solutions for Existing Homes: Multifamily...

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

    Building America Whole-House Solutions for Existing Homes: Multifamily Individual Heating and Ventilation Systems The conversion of an older Massachusetts building into ...

  8. Water Heating Basics | Department of Energy

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

    Water Heating Basics Water Heating Basics August 19, 2013 - 11:15am Addthis A variety of systems are available for water heating in homes and buildings. Learn about: Conventional Storage Water Heaters Demand (Tankless or Instantaneous) Water Heaters Heat Pump Water Heaters Solar Water Heaters Tankless Coil and Indirect Water Heaters Addthis Related Articles Tankless Demand Water Heater Basics Solar Water Heater Basics Heat Pump Water Heater Basics Energy Basics Home Renewable Energy Homes &

  9. Siting Your Solar Water Heating System | Department of Energy

    Energy Savers [EERE]

    Siting Your Solar Water Heating System Siting Your Solar Water Heating System Before you buy and install a solar water heating system, you need to first consider your site's solar ...

  10. Siting Your Solar Water Heating System | Department of Energy

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

    Siting Your Solar Water Heating System Siting Your Solar Water Heating System Before you buy and install a solar water heating system, you need to first consider your site's solar...

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

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

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

  12. Dehumidifying Heat Pipes | Department of Energy

    Energy Savers [EERE]

    claims that your thermostat can be set higher with the low humidity air, allowing a net energy savings. Related Information Home Cooling Systems Air Conditioning Heat Pump Systems...

  13. Building America Technology Solutions for New and Existing Homes: Boiler Control Replacement for Hydronically Heated Multifamily Buildings, Cambridge, Massachusetts

    Broader source: Energy.gov [DOE]

    The ARIES Collaborative partnered with Homeowners' Rehab Inc., a nonprofit affordable housing owner, to upgrade the central hydronic heating system in a 42-unit housing development, reducing heating energy use by an average of 19%.

  14. Carbon nanotube heat-exchange systems

    DOE Patents [OSTI]

    Hendricks, Terry Joseph; Heben, Michael J.

    2008-11-11

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

  15. Could Your Home Benefit from a Small Wind Electric System? | Department of

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

    Energy Could Your Home Benefit from a Small Wind Electric System? Could Your Home Benefit from a Small Wind Electric System? August 8, 2013 - 2:31pm Addthis A small wind electric system can be a clean, affordable way to power your home. | Photo courtesy of Thomas Fleckenstein, NREL 26476 A small wind electric system can be a clean, affordable way to power your home. | Photo courtesy of Thomas Fleckenstein, NREL 26476 Erik Hyrkas Erik Hyrkas Media Relations Specialist, Office of Energy

  16. Building America System Research Plan for Reduction of Miscellaneous Electrical Loads in Zero Energy Homes

    SciTech Connect (OSTI)

    Barley, C. D.; Haley, C.; Anderson, R.; Pratsch, L.

    2008-11-01

    This research plan describes the overall scope of system research that is needed to reduce miscellaneous electrical loads (MEL) in future net zero energy homes.

  17. Control system for fluid heated steam generator

    DOE Patents [OSTI]

    Boland, James F.; Koenig, John F.

    1985-01-01

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

  18. Control system for fluid heated steam generator

    DOE Patents [OSTI]

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

    1984-05-29

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

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

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

    Reduce Natural Gas Use in Your Industrial Process Heating Systems This fact sheet describes ten effective ways to save energy and money in industrial process heating systems by ...

  20. Economizer refrigeration cycle space heating and cooling system and process

    DOE Patents [OSTI]

    Jardine, Douglas M.

    1983-01-01

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

  1. Save Energy Now in Your Process Heating Systems | Department...

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

    Process Heating Systems Save Energy Now in Your Process Heating Systems This fact sheet describes how manufacturing plants can save energy and money by making energy efficiency ...

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

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

    Central Multifamily Water Heating Systems Building America Webinar: Central Multifamily Water Heating Systems The webinar was presented on January 21, 2015, and focused on the ...

  3. Solar Water Heating System Maintenance and Repair | Department...

    Energy Savers [EERE]

    Water Heating System Maintenance and Repair Solar Water Heating System Maintenance and Repair Rooftop solar water heaters need regular maintenance to operate at peak efficiency. | ...

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

    Office of Environmental Management (EM)

    Building Codes and Regulations for Solar Water Heating Systems Building Codes and Regulations for Solar Water Heating Systems June 24, 2012 - 1:50pm Addthis Photo Credit:...

  5. Solar Water Heating System Maintenance and Repair | Department...

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

    Water Heating System Maintenance and Repair Solar Water Heating System Maintenance and Repair Rooftop solar water heaters need regular maintenance to operate at peak efficiency. |...

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

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

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

  7. Economizer refrigeration cycle space heating and cooling system and process

    DOE Patents [OSTI]

    Jardine, D.M.

    1983-03-22

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

  8. Ground Source Heat Pump System Data Analysis | Department of...

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

    Ground Source Heat Pump System Data Analysis Ground Source Heat Pump System Data Analysis Emerging Technologies Project for the 2013 Building Technologies Office's Program Peer ...

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

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

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

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

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

    an Advanced Combined Heat and Power (CHP) System Utilizing Off-Gas from Coke Calcination - Fact Sheet, 2014 Development of an Advanced Combined Heat and Power (CHP) System ...

  11. Heating and Cooling System Support Equipment Basics | Department...

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

    and Cooling System Support Equipment Basics Heating and Cooling System Support Equipment ... Thermostats and ducts provide opportunities for saving energy. Dehumidifying heat pipes ...

  12. Home Energy Score Sample Report | Department of Energy

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

    Sample Report Home Energy Score Sample Report The Home Energy Score is a national rating system developed by the U.S. Department of Energy. The Score reflects the energy efficiency of a home based on the home's structure and heating, cooling, and hot water systems. The Home Facts provide details about the current structure and systems. Recommendations show how to improve the energy efficiency of the home to achieve a higher score and save money. PDF icon Home Energy Score: Sample Report More

  13. 5 Cool Things about Solar Heating | Department of Energy

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

    5 Cool Things about Solar Heating 5 Cool Things about Solar Heating March 26, 2013 - 3:08pm Addthis Solar heating systems can be a cost-effective way to heat your home. | Photo...

  14. Home Energy Scoring Systems, Call Slides and Discussion Summary...

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

    Energy Performance Score (EPS) The Audit * Performed by a BPI- and Seattle City Light-certified auditor. * Measures the physical attributes of a home, climate, and different types ...

  15. Community Based Wood Heat System for Fort Yukon

    Office of Environmental Management (EM)

    Community Based Wood Heat System for Fort Yukon A Systems Integration Bill Wall, PhD ... nation: 6.00 per gallon of heating fuel Heat School & Gym 30,000gals 180K Run ...

  16. Go for the Gold in Energy-Efficient Home Heating | Department...

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

    As the Olympics strive to be more energy efficient, we can champion the same effort in our homes and become energy saving Olympians. One of the biggest places to save energy (and ...

  17. Radiation detector system having heat pipe based cooling

    DOE Patents [OSTI]

    Iwanczyk, Jan S.; Saveliev, Valeri D.; Barkan, Shaul

    2006-10-31

    A radiation detector system having a heat pipe based cooling. The radiation detector system includes a radiation detector thermally coupled to a thermo electric cooler (TEC). The TEC cools down the radiation detector, whereby heat is generated by the TEC. A heat removal device dissipates the heat generated by the TEC to surrounding environment. A heat pipe has a first end thermally coupled to the TEC to receive the heat generated by the TEC, and a second end thermally coupled to the heat removal device. The heat pipe transfers the heat generated by the TEC from the first end to the second end to be removed by the heat removal device.

  18. Report on Solar Water Heating Quantitative Survey

    SciTech Connect (OSTI)

    Focus Marketing Services

    1999-05-06

    This report details the results of a quantitative research study undertaken to better understand the marketplace for solar water-heating systems from the perspective of home builders, architects, and home buyers.

  19. Building America Webinar: New Construction Hybrid-Ductless Heat...

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

    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 DHPhybrid heating system, the DHP fan ...

  20. Heating and current drive systems for TPX

    SciTech Connect (OSTI)

    Swain, D.; Goranson, P.; Halle, A. von; Bernabei, S.; Greenough, N.

    1994-05-24

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

  1. An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California

    SciTech Connect (OSTI)

    Hoen, Ben; Cappers, Peter; Wiser, Ryan; Thayer, Mark

    2011-04-19

    An increasing number of homes in the U.S. have sold with photovoltaic (PV) energy systems installed at the time of sale, yet relatively little research exists that estimates the marginal impacts of those PV systems on home sale prices. A clearer understanding of these possible impacts might influence the decisions of homeowners considering the installation of a PV system, homebuyers considering the purchase of a home with PV already installed, and new home builders considering including PV as an optional or standard product on their homes. This research analyzes a large dataset of California homes that sold from 2000 through mid-2009 with PV installed. It finds strong evidence that homes with PV systems sold for a premium over comparable homes without PV systems during this time frame. Estimates for this premium expressed in dollars per watt of installed PV range, on average, from roughly $4 to $5.5/watt across a large number of hedonic and repeat sales model specifications and robustness tests. When expressed as a ratio of the sales price premium of PV to estimated annual energy cost savings associated with PV, an average ratio of 14:1 to 19:1 can be calculated; these results are consistent with those of the more-extensive existing literature on the impact of energy efficiency on sales prices. When the data are split among new and existing homes, however, PV system premiums are markedly affected. New homes with PV show premiums of $2.3-2.6/watt, while existing homes with PV show premiums of more than $6/watt. Reasons for this discrepancy are suggested, yet further research is warranted. A number of other areas where future research would be useful are also highlighted.

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

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

    It is not intended to be a comprehensive technical text on improving process heating ... Improving Process Heating System Performance: A Sourcebook for Industry, Third Edition ...

  3. Passive shut-down heat removal system

    DOE Patents [OSTI]

    Hundal, Rolv; Sharbaugh, John E.

    1988-01-01

    An improved shut-down heat removal system for a liquid metal nuclear reactor of the type having a vessel for holding hot and cold pools of liquid sodium is disclosed herein. Generally, the improved system comprises a redan or barrier within the reactor vessel which allows an auxiliary heat exchanger to become immersed in liquid sodium from the hot pool whenever the reactor pump fails to generate a metal-circulating pressure differential between the hot and cold pools of sodium. This redan also defines an alternative circulation path between the hot and cold pools of sodium in order to equilibrate the distribution of the decay heat from the reactor core. The invention may take the form of a redan or barrier that circumscribes the inner wall of the reactor vessel, thereby defining an annular space therebetween. In this embodiment, the bottom of the annular space communicates with the cold pool of sodium, and the auxiliary heat exchanger is placed in this annular space just above the drawn-down level that the liquid sodium assumes during normal operating conditions. Alternatively, the redan of the invention may include a pair of vertically oriented, concentrically disposed standpipes having a piston member disposed between them that operates somewhat like a pressure-sensitive valve. In both embodiments, the cessation of the pressure differential that is normally created by the reactor pump causes the auxiliary heat exchanger to be immersed in liquid sodium from the hot pool. Additionally, the redan in both embodiments forms a circulation flow path between the hot and cold pools so that the decay heat from the nuclear core is uniformly distributed within the vessel.

  4. DOE Zero Energy Ready Home Case Study: Mandalay Homes, Phoenix, AZ,

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

    Affordable | Department of Energy Phoenix, AZ, Affordable DOE Zero Energy Ready Home Case Study: Mandalay Homes, Phoenix, AZ, Affordable DOE Zero Energy Ready Home Case Study: Mandalay Homes, Phoenix, AZ, Affordable Case study of a DOE Zero Energy Ready Home in Phoenix, AZ, that scored HERS 58 without PV or HERS 38 with PV. This 1,700-square-foot affordable home has R-21 framed walls, a sealed closed-cell spray foamed attic, an air-source heat pump with forced air, and a solar combo system

  5. DOE Tour of Zero: Cobbler Lane by Addison Homes | Department...

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

    The home's fresh air system utilizes an outdoor air intake that is ducted to the return side of the heat pump air handler through a high-capture filter. Even when the heat pump is ...

  6. Emergency heat removal system for a nuclear reactor

    DOE Patents [OSTI]

    Dunckel, Thomas L.

    1976-01-01

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

  7. Cooperative heat transfer and ground coupled storage system

    DOE Patents [OSTI]

    Metz, P.D.

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

  8. Cooperative heat transfer and ground coupled storage system

    DOE Patents [OSTI]

    Metz, Philip D.

    1982-01-01

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

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

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

    Multifamily Central Heat Pump Water Heating | Department of Energy Multifamily Central Heat Pump Water Heating Building America Webinar: Central Multifamily Water Heating Systems - Multifamily Central Heat Pump Water Heating This presentation will be delivered by Elizabeth Weitzel, Davis Energy Group, at the U.S. Department of Energy Building America webinar on January 21, 2015.The presentation will focus on the findings of an evaluation effort of a nominal 10.5 ton central HPWH installed at

  10. Waste Heat Utilization System Income Tax Deduction (Personal)

    Office of Energy Efficiency and Renewable Energy (EERE)

    Waste heat utilization system means facilities and equipment for the recovery of waste heat generated in the process of generating electricity and the use of such heat to generate additional elec...

  11. Waste Heat Utilization System Income Tax Deduction (Corporate)

    Office of Energy Efficiency and Renewable Energy (EERE)

    Waste heat utilization system means facilities and equipment for the recovery of waste heat generated in the process of generating electricity and the use of such heat to generate additional elec...

  12. Install Waste Heat Recovery Systems for Fuel-Fired Furnaces;...

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

    Program Install Waste Heat Recovery Systems for Fuel-Fired Furnaces For most fuel-fired heating equipment, a large amount of the heat supplied is wasted as exhaust or flue gases. ...

  13. Air-To-Water Heat Pumps with Radiant Delivery in Low Load Homes, Tucson, Arizona and Chico, California (Fact Sheet), Building America Case Study: Technology Solutions for New and Existing Homes, Building Technologies Office (BTO)

    Energy Savers [EERE]

    Air-to-Water Heat Pumps With Radiant Delivery in Low Load Homes Tucson, Arizona and Chico, California PROJECT INFORMATION Project Name: Field testing of air-to-water heat pump Location: Tucson, AZ and Chico, CA Partners: La Mirada Homes www.lamiradahomes.net Chico Green Builders Daikin www.daikinac.com ARBI http://arbi.davisenergy.com/ Building Component: HVAC, domestic hot water Application: New, single family Year Tested: 2011-2012 Applicable Climate Zones: Hot-dry, cold PERFORMANCE DATA Cost

  14. Measurement-Based Evaluation of Installed Filtration System Performance in Single-Family Homes

    SciTech Connect (OSTI)

    Chan, Wanyu Rengie; Singer, Brett C.

    2014-04-03

    This guide discusses important study design issues to consider when conducting an on-site evaluation of filtration system performance. The two most important dichotomies to consider in developing a study protocol are (1) whether systems are being evaluated in occupied or unoccupied homes and (2) whether different systems are being compared in the same homes or if the comparison is between systems installed in different homes. This document provides perspective and recommendations about a suite of implementation issues including the choice of particle measurement devices, selection of sampling locations, ways to control and/or monitor factors and processes that can impact particle concentrations, and data analysis approaches.

  15. ITER Ion Cyclotron Heating and Fueling Systems

    SciTech Connect (OSTI)

    Rasmussen, D.A.; Baylor, L.R.; Combs, S.K.; Fredd, E.; Goulding, R.H.; Hosea, J.; Swain, D.W.

    2005-04-15

    The ITER burning plasma and advanced operating regimes require robust and reliable heating and current drive and fueling systems. The ITER design documents describe the requirements and reference designs for the ion cyclotron and pellet fueling systems. Development and testing programs are required to optimize, validate and qualify these systems for installation on ITER.The ITER ion cyclotron system offers significant technology challenges. The antenna must operate in a nuclear environment and withstand heat loads and disruption forces beyond present-day designs. It must operate for long pulse lengths and be highly reliable, delivering power to a plasma load with properties that will change throughout the discharge. The ITER ion cyclotron system consists of one eight-strap antenna, eight rf sources (20 MW, 35-65 MHz), associated high-voltage DC power supplies, transmission lines and matching and decoupling components.The ITER fueling system consists of a gas injection system and multiple pellet injectors for edge fueling and deep core fueling. Pellet injection will be the primary ITER fuel delivery system. The fueling requirements will require significant extensions in pellet injector pulse length ({approx}3000 s), throughput (400 torr-L/s,) and reliability. The proposed design is based on a centrifuge accelerator fed by a continuous screw extruder. Inner wall pellet injection with the use of curved guide tubes will be utilized for deep fueling.

  16. SunShot Installs Solar Energy System on Local Habitat for Humanity Home |

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

    Department of Energy Installs Solar Energy System on Local Habitat for Humanity Home SunShot Installs Solar Energy System on Local Habitat for Humanity Home September 22, 2014 - 5:10pm Addthis 1 of 10 SunShot Initiative team members install a solar energy system on a Habitat for Humanity home in Washington, D.C. on Friday, September 19. The project was organized by GRID Alternatives, the nation's largest solar non-profit organization, as part of a two-day event to bring solar power to

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

    SciTech Connect (OSTI)

    2010-01-01

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

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

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

    a high boiling point. Viscosity and thermal capacity determine the amount of pumping energy required. A fluid with low viscosity and high specific heat is easier to pump, because...

  19. 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

  20. Passive Solar Home Design | Department of Energy

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

    North Carolina home gets most of its space heating from the passive solar design, but the solar thermal system (top of roof) supplies both domestic hot water and a secondary...

  1. DOE Zero Energy Ready Home Case Study: TC Legend Homes, Seattle, Washington

    SciTech Connect (OSTI)

    none,

    2013-09-01

    This house incorporates slab-on-grade, EPS roof, and radiant heating with an air-to-water heat pump that also preheats domestic hot water. Without counting in the solar panels, the home earns a home energy rating system (HERS) score of 37, with projected utility bills of about $740 a year. With the 6.4-kW photovoltaic power system installed on the roof, the home’s HERS scores drops to -1 and utility bills for the all-electric home drop to zero. This home was awarded a 2013 Housing Innovation Award in the affordable builder category.

  2. Vehicle hydraulic system that provides heat for passenger compartment

    DOE Patents [OSTI]

    Bartley, Bradley E.; Blass, James R.; Gibson, Dennis H.

    2001-01-01

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

  3. Improving Process Heating System Performance: A Sourcbook for Industry

    SciTech Connect (OSTI)

    2004-09-01

    A sourcebook designed to provide process heating system users with a reference outlining opportunities to improve system performance and optimize energy efficiency in industrial energy systems.

  4. Town of Pagosa Springs geothermal heating system

    SciTech Connect (OSTI)

    Garcia, M.B.

    1997-08-01

    The Town of Pagosa Springs has owned and operated a geothermal heating system since December 1982 to provide geothermal heating during the fall, winter and spring to customers in this small mountain town. Pagosa Springs is located in Archuleta County, Colorado in the southwestern corner of the State. The Town, nestled in majestic mountains, including the Continental Divide to the north and east, has an elevation of 7,150 feet. The use of geothermal water in the immediate area, however, dates back to the 1800`s, with the use of Ute Bands and the Navajo Nation and later by the U.S. Calvery in the 1880`s (Lieutenant McCauley, 1878). The Pagosa area geothermal water has been reported to have healing and therapeutic qualities.

  5. 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.

  6. Building America Top Innovations 2013 Profile – HPXML: A Standardized Home Performance Data Sharing System

    SciTech Connect (OSTI)

    none,

    2013-09-01

    This Top Innovation profile describes the Standard for Home Performance-Related Data Transfer (known as HPXML), developed by the National Renewable Energy Laboratory, which facilitates smooth communication between program tracking systems and energy upgrade analysis software,

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

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

    Natural Gas and Oil Heating Systems Tips: Natural Gas and Oil Heating Systems Install a new energy-efficient furnace to save money over the long term. Install a new ...

  8. Solar Water Heating System Maintenance and Repair | Department...

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

    Water Heating System Maintenance and Repair Solar Water Heating System Maintenance and Repair May 30, 2012 - 2:35pm Addthis Rooftop solar water heaters need regular maintenance to...

  9. 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...

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

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

    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 DHPhybrid heating ...

  11. Process Heating Systems | Department of Energy

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

    Locate a Qualified Specialist in your area who can help optimize plant efficiency. Process Heating Tip Sheets Check Burner Air to Fuel Ratios Check Heat Transfer Surfaces Furnace ...

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

    SciTech Connect (OSTI)

    Not Available

    1993-04-28

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

  13. 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.

  14. DOE Tour of Zero: The Village Park Eco Home by Sterling Brook...

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

    of 16 The high-efficiency Sterling Brook custom home uses an energy managementhome automation system operated by mobile devices to control heating and cooling, lighting, and...

  15. 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,

  16. Heat exchanger bypass system for an absorption refrigeration system

    DOE Patents [OSTI]

    Reimann, Robert C.

    1984-01-01

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

  17. Waste heat driven absorption refrigeration process and system

    DOE Patents [OSTI]

    Wilkinson, William H.

    1982-01-01

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

  18. Combined heat recovery and make-up water heating system

    SciTech Connect (OSTI)

    Kim, S.Y.

    1988-05-24

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

  19. Home Improvement Catalyst (HI-Cat) | Department of Energy

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

    Improvement Catalyst (HI-Cat) Home Improvement Catalyst (HI-Cat) The Home Improvement Catalyst (HI-Cat) is a new DOE initiative focused on high impact opportunities to achieve energy savings in home improvements already planned or being undertaken by homeowners. The home improvement market represents $150 billion in annual investment, with over 14 million projects that involve replacement or upgrades of heating and cooling systems, windows, siding and roofs, insulation and other measures.

  20. Measure Guideline. Heat Pump Water Heaters in New and Existing Homes

    SciTech Connect (OSTI)

    Shapiro, Carl; Puttagunta, Srikanth; Owens, Douglas

    2012-02-01

    This Building America Measure Guideline is intended for builders, contractors, homeowners, and policy-makers. This document is intended to explore the issues surrounding heat pump water heaters (HPWHs) to ensure that homeowners and contractors have the tools needed to appropriately and efficiently install HPWHs

  1. Triple loop heat exchanger for an absorption refrigeration system

    DOE Patents [OSTI]

    Reimann, Robert C.

    1984-01-01

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

  2. 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.

  3. 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.

  4. Home Improvement Catalyst: Bringing Energy Efficiency to More Homes Across America

    Broader source: Energy.gov [DOE]

    The home improvement market represents $150 billion in annual investment, with more than 14 million projects that involve replacement or upgrades of heating and cooling systems, windows, siding and roofs, insulation, and other measures.

  5. Home Improvement Catalyst: Focused on Energy Efficiency to More Homes Across America

    Broader source: Energy.gov [DOE]

    The home improvement market represents $150 billion in annual investment, with more than 14 million projects that involve replacement or upgrades of heating and cooling systems, windows, siding and roofs, insulation, and other measures.

  6. DOE Zero Energy Ready Home Case Study, Nexus EnergyHomes, Frederick...

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

    This urban infill community features a package of SIP walls, geothermal heat pumps, solar PV, and a proprietary energy management system. PDF icon Nexus EnergyHomes - Frederick, MD ...

  7. DOE Zero Energy Ready Home Case Study: Amerisips Homes, Charleston, SC |

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

    Department of Energy Amerisips Homes, Charleston, SC DOE Zero Energy Ready Home Case Study: Amerisips Homes, Charleston, SC Case study of a DOE Zero Energy Ready home on Johns Island in Charleston, SC, that scored HERS 30 without PV, or HERS 1 with 6-kW of PV. This custom 2-story, 2,085 ft2, home is constructed of structural insulated panels, with 6.5-in. SIPs in the walls and 8.25-in. SIPs in the floor and roof. The HVAC system includes an air-to-water heat pump with fan coil that provides

  8. Inductively heated particulate matter filter regeneration control system

    DOE Patents [OSTI]

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

    2012-10-23

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

  9. Building America Webinar: New Construction Hybrid-Ductless Heat Pumps Study: Resistance is Futile

    Broader source: Energy.gov [DOE]

    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...

  10. 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...

  11. Ultra Efficient Combined Heat, Hydrogen, and Power System

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

    Ultra Efficient Combined Heat, Hydrogen, and Power System DE-EE0003679 FuelCell Energy, ... coproduce low cost reducing gas, power and heat on site for reduction of copper powder ...

  12. Comparison of natural convection heat exchangers for solar water heating systems

    SciTech Connect (OSTI)

    Davidson, J.; Liu, W.

    1998-09-15

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

  13. Building Codes and Regulations for Solar Water Heating Systems | Department

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

    of Energy Codes and Regulations for Solar Water Heating Systems Building Codes and Regulations for Solar Water Heating Systems Photo Credit: iStockphoto Photo Credit: iStockphoto Before installing a solar water heating system, you should investigate local building codes, zoning ordinances, and subdivision covenants, as well as any special regulations pertaining to the site. You will probably need a building permit to install a solar energy system onto an existing building. Not every

  14. DOE Zero Energy Ready Home Case Study: Evolutionary Home Builders...

    Office of Environmental Management (EM)

    blown cellulose; wo air-to-air heat pumps SEER 14.1; HSPF 9.6; heat pump water heater. PDF icon DOE Zero Energy Ready Home Case Study: Evolutionary Home Builders, Geneva, IL More ...

  15. 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.

  16. Exterior Insulation Implications for Heating and Cooling Systems in Cold Climates

    SciTech Connect (OSTI)

    Herk, Anastasia; Poerschke, Andrew

    2015-04-09

    The New York State Energy Research and Development Authority (NYSERDA) is interested in finding cost-effective solutions for deep energy retrofits (DERs) related to exterior wall insulation in a cold climate, with targets of 50% peak load reduction and 50% space conditioning energy savings. The U.S. Department of Energy Building America team, IBACOS, in collaboration with GreenHomes America, Inc. (GHA), was contracted by NYSERDA to research exterior wall insulation solutions. In addition to exterior wall insulation, the strategies included energy upgrades where needed in the attic, mechanical and ventilation systems, basement, band joist, walls, and floors. Under Building America, IBACOS is studying the impact of a “thermal enclosure” DER on the sizing of the space conditioning system and the occupant comfort if the thermal capacity of the heating and cooling system is dramatically downsized without any change in the existing heating and cooling distribution system (e.g., size, tightness and supply outlet configurations).

  17. Exterior Insulation Implications for Heating and Cooling Systems in Cold Climates

    SciTech Connect (OSTI)

    Herk, Anastasia; Poerschke, Andrew

    2015-04-01

    The New York State Energy Research and Development Authority (NYSERDA) is interested in finding cost-effective solutions for deep energy retrofits (DERs) related to exterior wall insulation in a cold climate, with targets of 50% peak load reduction and 50% space conditioning energy savings. The U.S. Department of Energy Building America team, IBACOS, in collaboration with GreenHomes America, Inc. (GHA), was contracted by NYSERDA to research exterior wall insulation solutions. In addition to exterior wall insulation, the strategies included energy upgrades where needed in the attic, mechanical and ventilation systems, basement, band joist, walls, and floors. Under Building America, IBACOS is studying the impact of a “thermal enclosure” DER on the sizing of the space conditioning system and the occupant comfort if the thermal capacity of the heating and cooling system is dramatically downsized without any change in the existing heating and cooling distribution system (e.g., size, tightness and supply outlet configurations).

  18. Lightning Dock Geothermal Space Heating Project: Lightning Dock...

    Open Energy Info (EERE)

    Abstract The proposed project was to take the existing geothermal greenhouse and home heating systems, which consisted of pumping geothermal water and steam through passive...

  19. DOE Zero Energy Ready Home Case Study: M Street Homes — Smartlux on Greenpark, Houston, TX

    SciTech Connect (OSTI)

    none,

    2014-09-01

    This builder certified its first DOE Zero Energy Ready Home and won a Production Builder honor in the 2014 Housing Innovation Awards. It is the first home in the world to use a tri-generation system to supply electricity, heating, and cooling on site.

  20. Lessons from a Home Inspection

    Broader source: Energy.gov [DOE]

    Maintenance tips from a home inspector to keep the systems and appliances in your home running efficiently.

  1. Demonstration and Performance Monitoring of Foundation Heat Exchangers (FHX) in Ultra-High Energy Efficient Research Homes

    SciTech Connect (OSTI)

    Im, Piljae; Hughes, Patrick; Liu, Xiaobing

    2012-01-01

    The more widespread use of Ground Source Heat Pump (GSHP) systems has been hindered by their high first cost, which is mainly driven by the cost of the drilling and excavation for installation of ground heat exchangers (GHXs). A new foundation heat exchanger (FHX) technology was proposed to reduce first cost by placing the heat exchanger into the excavations made during the course of construction (e.g., the overcut for the basement and/or foundation and run-outs for water supply and the septic field). Since they reduce or eliminate the need for additional drilling or excavation, foundation heat exchangers have the potential to significantly reduce or eliminate the first cost premium associated with GSHPs. Since December 2009, this FHX technology has been demonstrated in two ultra-high energy efficient new research houses in the Tennessee Valley, and the performance data has been closely monitored as well. This paper introduces the FHX technology with the design, construction and demonstration of the FHX and presents performance monitoring results of the FHX after one year of monitoring. The performance monitoring includes hourly maximum and minimum entering water temperature (EWT) in the FHX compared with the typical design range, temperature difference (i.e., T) across the FHX, and hourly heat transfer rate to/from the surrounding soil.

  2. Heat pipe heat transport system for the Stirling Space Power Converter (SSPC)

    SciTech Connect (OSTI)

    Alger, D.L.

    1992-08-01

    Life issues relating to a sodium heat pipe heat transport system are described. The heat pipe system provides heat, at a temperature of 1050 K, to a 50 kWe Stirling engine/linear alternator power converter called the Stirling Space Power Converter (SSPC). The converter is being developed under a National Aeronautics and Space Administration program. Since corrosion of heat pipe materials in contact with sodium can impact the life of the heat pipe, a literature review of sodium corrosion processes was performed. It was found that the impurity reactions, primarily oxygen, and dissolution of alloy elements were the two corrosion process likely to be operative in the heat pipe. Approaches that are being taken to minimize these corrosion processes are discussed.

  3. Ground Source Heat Pump System Data Analysis

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

    ... For example: * Ground loop flow and inout temperatures * Pump powerspeed * Heat pump power or status * Utility billing data (pre- and post- if the project is a retrofit) ...

  4. Power systems utilizing the heat of produced formation fluid

    DOE Patents [OSTI]

    Lambirth, Gene Richard

    2011-01-11

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

  5. Building America Technology Solutions for New and Existing Homes:

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

    Foundation Heat Exchanger, Oak Ridge, Tennessee | Department of Energy Foundation Heat Exchanger, Oak Ridge, Tennessee Building America Technology Solutions for New and Existing Homes: Foundation Heat Exchanger, Oak Ridge, Tennessee The foundation heat exchanger, developed by Oak Ridge National Laboratory, is a new concept for a cost-effective horizontal ground heat exchanger that can be connected to water-to-water or water-to-air heat pump systems for space conditioning as well as domestic

  6. Chemical heat pump and chemical energy storage system

    DOE Patents [OSTI]

    Clark, Edward C.; Huxtable, Douglas D.

    1985-08-06

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

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

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

    Department of Energy Central Multifamily Water Heating Systems Building America Webinar: Central Multifamily Water Heating Systems The webinar was presented on January 21, 2015, and focused on the effective use of central heat pump water heaters (HPWHs) and control systems to reduce the energy use in hot water distribution. Presenters and specific topics for this webinar included: Elizabeth Weitzel from the Building America team, Alliance for Residential Building Innovation, presenting

  8. Thaw flow control for liquid heat transport systems

    DOE Patents [OSTI]

    Kirpich, Aaron S.

    1989-01-01

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

  9. Indirect heating system for turbine anti-icing

    SciTech Connect (OSTI)

    Wagar, S.N.

    1980-03-01

    Gas-transmission service in northern Minnesota has verified the effectiveness of American Air Filter Co.'s indirect-heating method of preventing gas-turbine icing at compressor stations. By routing hot exhaust gases through a heat exchanger rather than directly into the inlet-air system, the indirect-heating method avoids turbine fouling, raises the air temperature at a constant specific humidity, and provides a uniform cross section of heated intake air for good turbine efficiency.

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

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

    CPG also managed the controls design and thermo-mechanical integration of the system. Once the heat recovery system, 330 kW Genset, and control system were completed, CPG produced ...

  11. Heat recovery and the economizer for HVAC systems

    SciTech Connect (OSTI)

    Anantapantula, V.S. . Alco Controls Div.); Sauer, H.J. Jr. )

    1994-11-01

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

  12. Energy Efficient HVAC System for Distributed Cooling/Heating...

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

    Improving Energy Efficiency by Developing Components for Distributed Cooling and Heating Based on Thermal Comfort Modeling Energy Efficient HVAC System for Distributed Cooling...

  13. Property:Distributed Generation System Heating-Cooling Application...

    Open Energy Info (EERE)

    This is a property of type Page. Pages using the property "Distributed Generation System Heating-Cooling Application" Showing 21 pages using this property. D Distributed...

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

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

    Photo Credit: iStockphoto Photo Credit: iStockphoto Before installing a solar water heating system, you should investigate local building codes, zoning ordinances, and subdivision...

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

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

    Energy-Efficient Controls for Multifamily Domestic Hot Water Building America Webinar: Central Multifamily Water Heating Systems - Energy-Efficient Controls for Multifamily ...

  16. Ultra Efficient Combined Heat, Hydrogen, and Power System

    SciTech Connect (OSTI)

    2010-10-28

    Description of CHHP system which utilizes a high-temperature fuel cell to provide on-site process reducing gas, clean power, and heat.

  17. Wood-Burning Heating System Deduction | Department of Energy

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

    State Alabama Program Type Rebate Amount 100% Summary This statute allows individual taxpayers a deduction for the purchase and installation of a wood-burning heating system. The...

  18. Heat Transfer Salts for Nuclear Reactor Systems - Chemistry Control...

    Office of Scientific and Technical Information (OSTI)

    Heat Transfer Salts for Nuclear Reactor Systems - Chemistry Control, Corrosion Mitigation, ... guide to allow anyone to learn the fundamentals of chemistry, engineering, and safety ...

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

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

    ... very high-pressure steam systems ... reheating or heat treating (see below). High-temperature melting is the conversion ... of a metal from its ore, typically by fusion. ...

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

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

    ... very high-pressure steam systems ... reheating or heat treating (see below). High-temperature melting is the conversion ... has a signifcant effect on potential losses ...

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

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

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

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

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

    Natural Gas Use in Your Industrial Process Heating Systems Industrial Technologies Program ... Companies recognize the value of natural gas as a versatile, clean-burning fuel, but ...

  3. Building America Webinar: Central Multifamily Water Heating Systems

    Broader source: Energy.gov [DOE]

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

  4. DOE Zero Energy Ready Home Case Study: Dwell Development, Seattle, WA,

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

    Systems Home | Department of Energy Dwell Development, Seattle, WA, Systems Home DOE Zero Energy Ready Home Case Study: Dwell Development, Seattle, WA, Systems Home Case study of a DOE Zero Energy Ready Home in Seattle, WA, that scored HERS 34 without PV. This 2,000-square-foot system home has R-45 double-stud walls, an unvented flat roof with 2 inches of spray foam plus 18 inches blown cellulose, R-42 XPS under slab, triple-pane windows, and a ductless mini-split heat pump. PDF icon Dwell

  5. Method of measuring heat influx of a cryogenic transfer system

    DOE Patents [OSTI]

    Niemann, Ralph C.; Zelipsky, Steven A.; Rezmer, Ronald R.; Smelser, Peter

    1981-01-01

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

  6. Data mining of space heating system performance in affordable housing

    SciTech Connect (OSTI)

    Ren, Xiaoxin; Yan, Da; Hong, Tianzhen

    2015-02-16

    The space heating in residential buildings accounts for a considerable amount of the primary energy use. Therefore, understanding the operation and performance of space heating systems becomes crucial in improving occupant comfort while reducing energy use. This study investigated the behavior of occupants adjusting their thermostat settings and heating system operations in a 62-unit affordable housing complex in Revere, Massachusetts, USA. The data mining methods, including clustering approach and decision trees, were used to ascertain occupant behavior patterns. Data tabulating ON/OFF space heating states was assessed, to provide a better understanding of the intermittent operation of space heating systems in terms of system cycling frequency and the duration of each operation. The decision tree was used to verify the link between room temperature settings, house and heating system characteristics and the heating energy use. The results suggest that the majority of apartments show fairly constant room temperature profiles with limited variations during a day or between weekday and weekend. Data clustering results revealed six typical patterns of room temperature profiles during the heating season. Space heating systems cycled more frequently than anticipated due to a tight range of room thermostat settings and potentially oversized heating capacities. In conclusion, from this study affirm data mining techniques are an effective method to analyze large datasets and extract hidden patterns to inform design and improve operations.

  7. Data mining of space heating system performance in affordable housing

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

    Ren, Xiaoxin; Yan, Da; Hong, Tianzhen

    2015-02-16

    The space heating in residential buildings accounts for a considerable amount of the primary energy use. Therefore, understanding the operation and performance of space heating systems becomes crucial in improving occupant comfort while reducing energy use. This study investigated the behavior of occupants adjusting their thermostat settings and heating system operations in a 62-unit affordable housing complex in Revere, Massachusetts, USA. The data mining methods, including clustering approach and decision trees, were used to ascertain occupant behavior patterns. Data tabulating ON/OFF space heating states was assessed, to provide a better understanding of the intermittent operation of space heating systems inmore » terms of system cycling frequency and the duration of each operation. The decision tree was used to verify the link between room temperature settings, house and heating system characteristics and the heating energy use. The results suggest that the majority of apartments show fairly constant room temperature profiles with limited variations during a day or between weekday and weekend. Data clustering results revealed six typical patterns of room temperature profiles during the heating season. Space heating systems cycled more frequently than anticipated due to a tight range of room thermostat settings and potentially oversized heating capacities. In conclusion, from this study affirm data mining techniques are an effective method to analyze large datasets and extract hidden patterns to inform design and improve operations.« less

  8. What do the DOE Zero Energy Ready Home Program Specs Actually...

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

    ... conditioners, air-source heat pumps, and water-source (i.e., geothermal) heat pumps up to ... In other words, under Revision 07, if a home's heatingcooling system happens to be a ...

  9. Efficient Solutions for Existing Homes Case Study: Solar Water Heating in Multifamily Buildings

    Broader source: Energy.gov [DOE]

    In spring 2014, Olive Street Development completed a major renovation project—converting an old school building in Greenfield, Massachusetts, into 12 high-performance apartments. The developer installed SDHW to reduce fossil-fuel consumption, and CARB has been monitoring the system since its completion.

  10. New energy-conserving passive solar single-family homes. Cycle 5, Category 2 HUD solar heating and cooling demonstration program

    SciTech Connect (OSTI)

    Not Available

    1981-01-01

    The 91 new single-family, energy-conserving passive solar homes described represent award winning designs of the series of five demonstration cycles of the HUD program. Information is presented to help builders and lenders to understand passive solar design, to recognize passive solar buildings, and to provide specific design, construction, and marketing suggestions and details. The first section describes the concept of passive solar energy, explains the various functions which passive solar systems must perform, and discusses the various types of passive systems found in the Cycle 5 projects. The second section discusses each of the 91 solar homes. The third section details the issues of climate requirements and site design concerns, gives examples of building construction, and suggests how to market solar homes. The appendices address more technical aspects of the design and evaluation of passive solar homes.

  11. Shape memory alloy heat engines and energy harvesting systems (Patent) |

    Office of Scientific and Technical Information (OSTI)

    DOEPatents Data Explorer Search Results Shape memory alloy heat engines and energy harvesting systems Title: Shape memory alloy heat engines and energy harvesting systems A heat engine includes a first rotatable pulley and a second rotatable pulled spaced from the first rotatable pulley. A shape memory alloy (SMA) element is disposed about respective portions of the pulleys at an SMA pulley ratio. The SMA element includes first spring coil and a first fiber core within the first spring coil.

  12. Shape memory alloy heat engines and energy harvesting systems (Patent) |

    Office of Scientific and Technical Information (OSTI)

    DOEPatents Data Explorer Search Results Shape memory alloy heat engines and energy harvesting systems Title: Shape memory alloy heat engines and energy harvesting systems A heat engine includes a first rotatable pulley and a second rotatable pulley spaced from the first rotatable pulley. A shape memory alloy (SMA) element is disposed about respective portions of the pulleys at an SMA pulley ratio. The SMA element includes a first wire, a second wire, and a matrix joining the first wire and

  13. Improving Process Heating System Performance: A Sourcebook for Industry,

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

    Second Edition | Department of Energy Second Edition Improving Process Heating System Performance: A Sourcebook for Industry, Second Edition This sourcebook describes basic process heating applications and equipment, and outlines opportunities for energy and performance improvements. It also discusses the merits of using a systems approach in identifying and implementing these improvement opportunities. It is not intended to be a comprehensive technical text on improving process heating

  14. A Fuzzy-Logic Subsumption Controller for Home Energy Management Systems

    SciTech Connect (OSTI)

    Ainstworth, Nathan; Johnson, Brian; Lundstrom, Blake

    2015-10-05

    Presentation for NAPS 2015 associated with conference publication CP-64392. Home Energy Management Systems (HEMS) are controllers that manage and coordinate the generation, storage, and loads in a home. These controllers are increasingly necessary to ensure that increasing penetrations of distributed energy resources are used effectively and do not disrupt the operation of the grid. In this paper, we propose a novel approach to HEMS design based on behavioral control methods, which do not require accurate models or predictions and are very responsive to changing conditions.

  15. July 17 ESTAP Webinar: Resilient Solar-Storage Systems for Homes and Commercial Facilities

    Broader source: Energy.gov [DOE]

    On Wednesday, July 17 from 2 – 3 p.m. ET, Clean Energy States Alliance will host a webinar on resilient solar-storage systems for homes and commercial facilities. The webinar will be introduced by Dr. Imre Gyuk, Energy Storage Program Manager in the Office of Electricity Delivery and Energy Reliability.

  16. Planning for Home Renewable Energy Systems | Department of Energy

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

    to gain the inspector's approval if you or your installer follow the National Electrical Code (NEC); install pre-engineered, packaged systems; properly brief the inspector on your...

  17. Quality Management Systems for Zero Energy Ready Home Webinar...

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

    ... Framing and mechanicals, and HVAC distribution systems. Next slide: As an example, here you see a drawing -- a correlation drawing -- showing your ductwork and the framing members. ...

  18. Estimated costs of ventilation systems complying with the HUD ventilation standard for manufactured homes

    SciTech Connect (OSTI)

    Miller, J.D.; Conner, C.C.

    1993-11-01

    At the request of the US Department of Housing and Urban Development (HUD), the Pacific Northwest Laboratory estimated the material, labor, and operating costs for ventilation equipment needed for compliance with HUD`s proposed revision to the ventilation standard for manufactured housing. This was intended to bound the financial impacts of the ventilation standard revision. Researchers evaluated five possible prototype ventilation systems that met the proposed ventilation requirements. Of those five, two systems were determined to be the most likely used by housing manufacturers: System 1 combines a fresh air duct with the existing central forced-air system to supply and circulate fresh air to conditioned spaces. System 2 uses a separate exhaust fan to remove air from the manufactured home. The estimated material and labor costs for these two systems range from $200 to $300 per home. Annual operating costs for the two ventilation systems were estimated for 20 US cities. The estimated operating costs for System 1 ranged from $55/year in Las Vegas, Nevada, to $83/year in Bismarck, North Dakota. Operating costs for System 2 ranged from a low of $35/year in Las Vegas to $63/year in Bismarck. Thus, HUD`s proposed increase in ventilation requirements will add less than $100/year to the energy cost of a manufactured home.

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

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

    The system can operate as a baseload system to serve 75% of Texas A&M's peak power needs, 65% of total electrical energy needs, and 80% of the heating loads (steam for cooling ...

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

    Broader source: Energy.gov [DOE]

    Project objectives: Create a campus geothermal heating and cooling system; Validate the cost savings associated with a geothermal system; Reduce emissions of CO2, CO, PM, SO2, NOx.

  1. Electrically heated particulate filter regeneration methods and systems for

    Office of Scientific and Technical Information (OSTI)

    hybrid vehicles (Patent) | DOEPatents Electrically heated particulate filter regeneration methods and systems for hybrid vehicles Title: Electrically heated particulate filter regeneration methods and systems for hybrid vehicles A control system for controlling regeneration of a particulate filter for a hybrid vehicle is provided. The system generally includes a regeneration module that controls current to the particulate filter to initiate regeneration. An engine control module controls

  2. Split-System Cold Climate Heat Pump | Department of Energy

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

    Split-System Cold Climate Heat Pump Split-System Cold Climate Heat Pump Photo of the prototype cold climate heat pump outdoor unit, installed at the Ohio field test site in January 2015. <br />Credit: Oak Ridge National Laboratory Photo of the prototype cold climate heat pump outdoor unit, installed at the Ohio field test site in January 2015. Credit: Oak Ridge National Laboratory Lead Performer: Oak Ridge National Laboratory - Oak Ridge, TN Partners: -- Unico Inc. - St. Louis, MO --

  3. Installing and Maintaining a Home Solar Electric System | Department...

    Energy Savers [EERE]

    ... (W) or kilowatts (kW). If possible, have the bids specify the system capacity in "AC Watts" (alternating current) under ... Also request an estimate of the amount of energy that the ...

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

    SciTech Connect (OSTI)

    Ghafghazi, Saeed; Sowlati, T.; Sokhansanj, Shahabaddine; Melin, Staffan

    2011-03-01

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

  5. Space Heating and Cooling Basics | Department of Energy

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

    Space Heating and Cooling Basics Space Heating and Cooling Basics August 16, 2013 - 1:04pm Addthis A wide variety of technologies are available for heating and cooling homes and other buildings. In addition, many heating and cooling systems have certain supporting equipment in common, such as thermostats and ducts, which provide opportunities for saving energy. Learn how these technologies and systems work. Learn about: Cooling Systems Heating Systems Heat Pump Systems Supporting Equipment for

  6. DOE Tour of Zero: The Charlottesville Infill by Promethean Homes...

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

    5 of 13 Low-no-VOC certified paints and finishes are used for a healthier indoor environment. 6 of 13 This home uses an ultra-efficient heat pump system (21 SEER, 12.2...

  7. City of Tucson- Solar Design Requirement for Homes

    Broader source: Energy.gov [DOE]

    To comply with this requirement, new homes must either have a complete solar water heating system installed or comply with one of two solar stub-out options. Option one requires the installation...

  8. Solar Energy and Your Home: Questions and Answers

    DOE R&D Accomplishments [OSTI]

    1984-01-01

    This fact sheet provides a basic introduction to solar heating and cooling systems. It is intended for the many homeowners who could benefit from living in a solar home.

  9. Flathead Electric Cooperative Facility Geothermal Heat Pump System Upgrade

    SciTech Connect (OSTI)

    Liu, Xiaobing

    2014-06-01

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

  10. Building America Case Study: Foundation Heat Exchanger, Oak Ridge...

    Energy Savers [EERE]

    water-to-air heat pump systems for space conditioning as well as domestic water heating. ... Therefore, in the case of highly energy-efficient homes, the space-conditioning and ...

  11. Questar Gas- Residential Solar Assisted Water Heating Rebate Program

    Broader source: Energy.gov [DOE]

    Questar gas provides incentives for residential customers to purchase and install solar water heating systems (both for domestic and pool heating uses) on their newly-constructed homes. Rebates of...

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

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

    Distributed Energy » Combined Heat and Power (CHP) Systems Combined Heat and Power (CHP) Systems The CHP systems program aimed to facilitate acceptance of distributed energy in end-use sectors by forming partnerships with industry consortia in the commercial building, merchant stores, light industrial, supermarkets, restaurants, hospitality, health care and high-tech industries. In high-tech industries such as telecommunications, commercial data processing and internet services, the use of

  13. 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...

  14. 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.

  15. Nuclear reactor heat transport system component low friction support system

    DOE Patents [OSTI]

    Wade, Elman E.

    1980-01-01

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

  16. Technology Solutions Case Study: Selecting Ventilation Systems for Existing Homes

    SciTech Connect (OSTI)

    2014-12-01

    In multifamily buildings, particularly in the Northeast, exhaust ventilation strategies are the norm as a means of meeting both local exhaust and whole-unit mechanical ventilation rates. The issue of where the "fresh" air is coming from is gaining significance as air-tightness standards for enclosures become more stringent, and the normal leakage paths through the building envelope disappear. Researchers from the Consortium for Advanced Residential Buildings (CARB) found that the majority of high performance, new construction, multifamily housing in the Northeast use one of four general strategies for ventilation: continuous exhaust only with no designated supply or make-up air source, continuous exhaust with ducted make-up air to apartments, continuous exhaust with supply through a make-up air device integral to the unit HVAC, and continuous exhaust with supply through a passive inlet device, such as a trickle vent. Insufficient information is available to designers on how these various systems are best applied. In this project, the CARB team evaluated the four different strategies for providing make-up air to multifamily residential buildings and developed guidelines to help contractors and building owners choose the best ventilation systems.

  17. Linking home energy rating systems with energy efficiency financing: Progress on national and state programs

    SciTech Connect (OSTI)

    Farhar, B.C.; Collins, N.E.; Walsh, R.W.

    1996-10-01

    In 1991 and early 1992, the U.S. Department of Energy (DOE), in cooperation with the U.S. Department of Housing and Urban Development (HUD), established a National Collaborative on Home Energy Rating Systems (HERS) and Energy Efficient Mortgages (EEMs). The Collaborative's purpose was to involve stakeholders at a national policy level to develop a plan leading the nation toward a voluntary system linking HERS with EEMs. The National Renewable Energy Laboratory (NREL) coordinated the National Collaborative's meetings for DOE. Composed of representatives from 25 stakeholder organizations, the Collaborative, after some 14 meetings, reached consensus on two documents, both published by NREL in mg 1992: A National Program for Energy-Efficient Mortgages and Home Energy Rating Systems: A Blueprint for Action and Going National with HERS and EEMs: Issues and Impacts, The Collected Papers of the National Collaborative.

  18. Ultra Efficient Combined Heat, Hydrogen, and Power System - Presentation by

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

    FuelCell Energy, June 2011 | Department of Energy Ultra Efficient Combined Heat, Hydrogen, and Power System - Presentation by FuelCell Energy, June 2011 Ultra Efficient Combined Heat, Hydrogen, and Power System - Presentation by FuelCell Energy, June 2011 Presentation on Ultra Efficient Combined Heat, Hydrogen, and Power System, given by Pinakin Patel of FuelCell Energy, at the U.S. DOE Industrial Distributed Energy Portfolio Review Meeting in Washington, D.C. on June 1-2, 2011. PDF icon

  19. 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.

  20. 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.

  1. Ash reduction system using electrically heated particulate matter filter

    DOE Patents [OSTI]

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

    2011-08-16

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

  2. Low exhaust temperature electrically heated particulate matter filter system

    DOE Patents [OSTI]

    Gonze, Eugene V.; Paratore, Jr., Michael J.; Bhatia, Garima

    2012-02-14

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

  3. IEA Annex 26: Advanced Supermarket Refrigeration/Heat Recovery Systems

    SciTech Connect (OSTI)

    Baxter, VAN

    2003-05-19

    With increased concern about the impact of refrigerant leakage on global warming, a number of new supermarket refrigeration system configurations requiring significantly less refrigerant charge are being considered. In order to help promote the development of advanced systems and expand the knowledge base for energy-efficient supermarket technology, the International Energy Agency (IEA) established IEA Annex 26 (Advanced Supermarket Refrigeration/Heat Recovery Systems) under the ''IEA Implementing Agreement on Heat Pumping Technologies''. Annex 26 focuses on demonstrating and documenting the energy saving and environmental benefits of advanced systems design for food refrigeration and space heating and cooling for supermarkets. Advanced in this context means systems that use less energy, require less refrigerant and produce lower refrigerant emissions. Stated another way, the goal is to identify supermarket refrigeration and HVAC technology options that reduce the total equivalent warming impact (TEWI) of supermarkets by reducing both system energy use (increasing efficiency) and reducing total refrigerant charge. The Annex has five participating countries: Canada, Denmark, Sweden, the United Kingdom, and the United States. The working program of the Annex has involved analytical and experimental investigation of several candidate system design approaches to determine their potential to reduce refrigerant usage and energy consumption. Advanced refrigeration system types investigated include the following: distributed compressor systems--small parallel compressor racks are located in close proximity to the food display cases they serve thus significantly shortening the connecting refrigerant line lengths; secondary loop systems--one or more central chillers are used to refrigerate a secondary coolant (e.g. brine, ice slurry, or CO2) that is pumped to the food display cases on the sales floor; self-contained display cases--each food display case has its own refrigeration unit; low-charge direct expansion--similar to conventional multiplex refrigeration systems but with improved controls to limit charge. Means to integrate store HVAC systems for space heating/cooling with the refrigeration system have been investigated as well. One approach is to use heat pumps to recover refrigeration waste heat and raise it to a sufficient level to provide for store heating needs. Another involves use of combined heating and power (CHP) or combined cooling, heating, and power (CCHP) systems to integrate the refrigeration, HVAC, and power services in stores. Other methods including direct recovery of refrigeration reject heat for space and water heating have also been examined.

  4. NREL Delivers In-Home HVAC Efficiency Testing Solutions (Fact Sheet), Building America: Technical Highlight, Building Technologies Program (BTP)

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

    Delivers In-Home HVAC Efficiency Testing Solutions Researchers at the National Renewable Energy Laboratory (NREL) have recently developed two simple in-home efficiency test methods that can be used by technicians, researchers, or interested homeowners to verify the correct opera- tion and energy efficiency of a home's air conditioning and heating equipment. An efficiency validation method for mini-split heat pumps (MSHPs)-highly efficient refrigerant-based air conditioning and heating systems

  5. Install Waste Heat Recovery Systems for Fuel-Fired Furnaces | Department of

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

    Energy Waste Heat Recovery Systems for Fuel-Fired Furnaces Install Waste Heat Recovery Systems for Fuel-Fired Furnaces This tip sheet recommends installing waste heat recovery systems for fuel-fired furnaces to increase the energy efficiency of process heating systems. PROCESS HEATING TIP SHEET #8 PDF icon Install Waste Heat Recovery Systems for Fuel-Fired Furnaces (September 2005) More Documents & Publications Load Preheating Using Flue Gases from a Fuel-Fired Heating System Using Waste

  6. Electric Resistance Heating | Department of Energy

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

    Heat & Cool » Home Heating Systems » Electric Resistance Heating Electric Resistance Heating Baseboard heaters are one type of electric resistance heaters. | Photo courtesy of ©iStockphoto/drewhadley Baseboard heaters are one type of electric resistance heaters. | Photo courtesy of ©iStockphoto/drewhadley Electric resistance heating is 100% energy efficient in the sense that all the incoming electric energy is converted to heat. However, most electricity is produced from coal, gas, or

  7. Heat Transfer and Thermophotovoltaic Power Generation in Oil-fired Heating Systems

    SciTech Connect (OSTI)

    Butcher, T.; Hammonds, J.S.; Horne, E.; Kamath, B.; Carpenter, J.; Woods, D.R.

    2010-10-21

    The focus of this study is the production of electric power in an oil-fired, residential heatingsystem using thermophotovoltaic (TPV) conversion devices. This work uses experimental, computational, and analytical methods to investigate thermal mechanisms that drive electric power production in the TPV systems. An objective of this work is to produce results that will lead to the development of systems that generate enough electricity such that the boiler is self-powering. An important design constraint employed in this investigation is the use of conventional, yellow-flame oil burners, integrated with a typical boiler. The power production target for the systems developed here is 100 W - the power requirement for a boiler that uses low-power auxiliary components. The important heattransfer coupling mechanisms that drive power production in the systems studied are discussed. The results of this work may lead to the development of systems that export power to the home electric system.

  8. Performance of an Organic Rankine Cycle Waste Heat Recovery System...

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

    Performance of an Organic Rankine Cycle Waste Heat Recovery System for Light Duty Diesel Engines Poster presented at the 16th Directions in Engine-Efficiency and Emissions Research ...

  9. In situ conversion process utilizing a closed loop heating system

    DOE Patents [OSTI]

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

    2009-08-18

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

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

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

    a new energy-efficient furnace to save money over the long term. Install a new energy-efficient furnace to save money over the long term. If you plan to buy a new heating system,...

  11. World Energy Projection System Plus Model Documentation: District Heat Model

    Reports and Publications (EIA)

    2011-01-01

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

  12. Combined Heat and Power Systems Technology Development and Demonstrati...

    Office of Scientific and Technical Information (OSTI)

    heating and more electrical efficiency California Air Resources Board (CARB) level emissions, and a price target of 600 per kW, the system would represent a step change in the...

  13. Geothermal Heating and Cooling Systems Featured on NBC Nightly News

    Broader source: Energy.gov [DOE]

    NBC Nightly News recently featured a story on geothermal heating and cooling systems that are providing 30%-70% energy and cost savings for homeowners in Jordan, New York.

  14. High Efficiency Integrated Space Conditioning, Water Heating and Air Distribution System for HUD-Code Manufactured Housing

    SciTech Connect (OSTI)

    Henry DeLima; Joe Akin; Joseph Pietsch

    2008-09-14

    Recognizing the need for new space conditioning and water heating systems for manufactured housing, DeLima Associates assembled a team to develop a space conditioning system that would enhance comfort conditions while also reducing energy usage at the systems level. The product, Comboflair® was defined as a result of a needs analysis of project sponsors and industry stakeholders. An integrated system would be developed that would combine a packaged airconditioning system with a small-duct, high-velocity air distribution system. In its basic configuration, the source for space heating would be a gas water heater. The complete system would be installed at the manufactured home factory and would require no site installation work at the homesite as is now required with conventional split-system air conditioners. Several prototypes were fabricated and tested before a field test unit was completed in October 2005. The Comboflair® system, complete with ductwork, was installed in a 1,984 square feet, double-wide manufactured home built by Palm Harbor Homes in Austin, TX. After the home was transported and installed at a Palm Harbor dealer lot in Austin, TX, a data acquisition system was installed for remote data collection. Over 60 parameters were continuously monitored and measurements were transmitted to a remote site every 15 minutes for performance analysis. The Comboflair® system was field tested from February 2006 until April 2007. The cooling system performed in accordance with the design specifications. The heating system initially could not provide the needed capacity at peak heating conditions until the water heater was replaced with a higher capacity standard water heater. All system comfort goals were then met. As a result of field testing, we have identified improvements to be made to specific components for incorporation into production models. The Comboflair® system will be manufactured by Unico, Inc. at their new production facility in St. Louis, MO. The product will be initially launched in the hot-humid climates of the southern U.S.

  15. Heat Transfer Salts for Nuclear Reactor Systems - Chemistry Control,

    Office of Scientific and Technical Information (OSTI)

    Corrosion Mitigation, and Modeling (Technical Report) | SciTech Connect Heat Transfer Salts for Nuclear Reactor Systems - Chemistry Control, Corrosion Mitigation, and Modeling Citation Details In-Document Search Title: Heat Transfer Salts for Nuclear Reactor Systems - Chemistry Control, Corrosion Mitigation, and Modeling The concept of a molten salt reactor has existed for nearly sixty years. Previously all work was done during a large collaborative effort at Oak Ridge National Laboratory,

  16. Solar heating system installed at Jackson, Tennessee. Final report

    SciTech Connect (OSTI)

    1980-10-01

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

  17. Heat storage duration

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1981-01-01

    Both the amount and duration of heat storage in massive elements of a passive building are investigated. Data taken for one full winter in the Balcomb solar home are analyzed with the aid of sub-system simulation models. Heat storage duration is tallied into one-day intervals. Heat storage location is discussed and related to overall energy flows. The results are interpreted and conclusions drawn.

  18. Effects of Home Energy Management Systems on Distribution Utilities and Feeders Under Various Market Structures: Preprint

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

    Effects of Home Energy Management Systems on Distribution Utilities and Feeders under Various Market Structures Preprint Mark Ruth, Annabelle Pratt, Monte Lunacek, Saurabh Mittal, Hongyu Wu, and Wesley Jones National Renewable Energy Laboratory Presented at the 23 rd International Conference on Electricity Distribution Lyon, France June 15-18, 2015 Conference Paper NREL/CP-6A20-63500 July 2015 NOTICE The submitted manuscript has been offered by an employee of the Alliance for Sustainable Energy,

  19. A computer simulation of an induction heating system

    SciTech Connect (OSTI)

    Egan, L.R. ); Furlani, E.P. )

    1991-09-01

    In this paper a method is presented for the design and analysis of induction heating systems. The method entails the simulation of system performance using an equivalent circuit approach. Equivalent circuit models are obtained for the three pats of an induction heating system: the power source, the impedance matching circuit, and the load. These model are combined in a system model which is analyzed using the Advanced Continuous Simulation Language (ACSL). This approach is applied to an existing system, and the predicted performance is in close agreement with measured data.

  20. 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...

  1. Tax Credits for Home Energy Improvements: If You Buy an Energy-Efficient Product or Renewable Energy System for Your Home, You May be Eligible for a Federal Tax Credit (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-05-01

    This two-page fact sheet provides an overview of 2010 federal tax credits for energy efficient products or renewable energy systems in the home.

  2. Building America Technology Solutions for New and Existing Homes: Advanced

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

    Controls Improve Performance of Combination Space- and Water-Heating Systems | Department of Energy Controls Improve Performance of Combination Space- and Water-Heating Systems Building America Technology Solutions for New and Existing Homes: Advanced Controls Improve Performance of Combination Space- and Water-Heating Systems In this project, NorthernSTAR Building America Partnership team demonstrated improved controls have the potential to reduce complexity of combination systems and boost

  3. Pulte Homes - Las Vegas, Nevada: Cost-Saving System Trade-Offs for Hot, Dry Climates

    SciTech Connect (OSTI)

    1999-11-01

    This document describes Pulte Homes in Las Vegas, Nevada, which serve as a case study for energy efficient homes in hot, dry climates.

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

    SciTech Connect (OSTI)

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

    1981-01-01

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

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

    SciTech Connect (OSTI)

    Xing, Lu; Cullin, James; Spitler, Jeffery; Im, Piljae; Fisher, Daniel

    2011-01-01

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

  6. Development of an Integrated Residential Heating, Ventilation, Cooling, and Dehumidification System for Residences

    SciTech Connect (OSTI)

    Hoeschele, M.A.; D.A. Springer

    2008-06-18

    The Need and the Opportunity Codes such as ASHRAE 90.2 and IECC, and programs such as Energy Star and Builders Challenge, are causing new homes to be built to higher performance standards. As a result sensible cooling loads in new homes are going down, but indoor air quality prerogatives are causing ventilation rates and moisture loads to increase in humid climates. Conventional air conditioners are unable to provide the low sensible heat ratios that are needed to efficiently cool and dehumidify homes since dehumidification potential is strongly correlated with cooling system operating hours. The project team saw an opportunity to develop a system that is at least as effective as a conventional air conditioner plus dehumidifier, removes moisture without increasing the sensible load, reduces equipment cost by integrating components, and simplifies installation. Project Overview Prime contractor Davis Energy Group led a team in developing an Integrated Heating, Ventilation, Cooling, and Dehumidification (I-HVCD) system under the DOE SBIR program. Phase I and II SBIR project activities ran from July 2003 through December 2007. Tasks included: (1) Mechanical Design and Prototyping; (2) Controls Development; (3) Laboratory and Field Testing; and (4) Commercialization Activities Technology Description. Key components of the prototype I-HVCD system include an evaporator coil assembly, return and outdoor air damper, and controls. These are used in conjunction with conventional components that include a variable speed air handler or furnace, and a two-stage condensing unit. I-HVCD controls enable the system to operate in three distinct cooling modes to respond to indoor temperature and relative humidity (RH) levels. When sensible cooling loads are high, the system operates similar to a conventional system but varies supply airflow in response to indoor RH. In the second mode airflow is further reduced, and the reheat coil adds heat to the supply air. In the third mode, the reheat coil adds additional heat to maintain the supply air temperature close to the return air temperature (100% latent cooling). Project Outcomes Key Phase II objectives were to develop a pre-production version of the system and to demonstrate its performance in an actual house. The system was first tested in the laboratory and subsequently underwent field-testing at a new house in Gainesville, Florida. Field testing began in 2006 with monitoring of a 'conventional best practices' system that included a two stage air conditioner and Energy Star dehumidifier. In September 2007, the I-HVCD components were installed for testing. Both systems maintained uniform indoor temperatures, but indoor RH control was considerably better with the I-HVCD system. The daily variation from average indoor humidity conditions was less than 2% for the I-HVCD vs. 5-7% for the base case system. Data showed that the energy use of the two systems was comparable. Preliminary installed cost estimates suggest that production costs for the current I-HVCD integrated design would likely be lower than for competing systems that include a high efficiency air conditioner, dehumidifier, and fresh air ventilation system. Project Benefits This project verified that the I-HVCD refrigeration compacts are compact (for easy installation and retrofit) and can be installed with air conditioning equipment from a variety of manufacturers. Project results confirmed that the system can provide precise indoor temperature and RH control under a variety of climate conditions. The I-HVCD integrated approach offers numerous benefits including integrated control, easier installation, and reduced equipment maintenance needs. Work completed under this project represents a significant step towards product commercialization. Improved indoor RH control and fresh air ventilation are system attributes that will become increasingly important in the years ahead as building envelopes improve and sensible cooling loads continue to fall. Technologies like I-HVCD will be instrumental in meeting goals set by Building America

  7. Optimizing Hydronic System Performance in Residential Applications

    SciTech Connect (OSTI)

    2013-10-01

    Even though new homes constructed with hydronic heat comprise only 3% of the market (US Census Bureau 2009), of the 115 million existing homes in the United States, almost 14 million of those homes (11%) are heated with steam or hot water systems according to 2009 US Census data. Therefore, improvements in hydronic system performance could result in significant energy savings in the US.

  8. Home Page

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

    Score » Home Energy Score Report Home Energy Score Report The Home Energy Score is similar to a vehicle's miles-per-gallon rating. The Home Energy Score allows homeowners to compare the energy performance of their homes to other homes nationwide. It also provides homeowners with suggestions for improving their homes' efficiency. The process starts with a Home Energy Score Assessor collecting energy information during a brief home walk-through. Using the Home Energy Scoring Tool, developed by

  9. A Waste Heat Recovery System for Light Duty Diesel Engines

    SciTech Connect (OSTI)

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

    2010-01-01

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

  10. Integral collector storage system with heat exchange apparatus

    DOE Patents [OSTI]

    Rhodes, Richard O.

    2004-04-20

    The present invention relates to an integral solar energy collector storage systems. Generally, an integral collector storage system includes a tank system, a plurality of heat exchange tubes with at least some of the heat exchange tubes arranged within the tank system, a first glazing layer positioned over the tank system and a base plate positioned under the tank system. In one aspect of the invention, the tank system, the first glazing layer an the base plate each include protrusions and a clip is provided to hold the layers together. In another aspect of the invention, the first glazing layer and the base plate are ribbed to provide structural support. This arrangement is particularly useful when these components are formed from plastic. In yet another aspect of the invention, the tank system has a plurality of interconnected tank chambers formed from tubes. In this aspect, a supply header pipe and a fluid return header pipe are provided at a first end of the tank system. The heat exchange tubes have inlets coupled to the supply header pipe and outlets coupled to the return header pipe. With this arrangement, the heat exchange tubes may be inserted into the tank chambers from the first end of the tank system.

  11. Heat storage system utilizing phase change materials government rights

    DOE Patents [OSTI]

    Salyer, Ival O.

    2000-09-12

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

  12. Performance of a hybrid ground-coupled heat pump system

    SciTech Connect (OSTI)

    Phetteplace, G.; Sullivan, W.

    1998-10-01

    In climates dominated by air conditioning, a few so-called hybrid ground-coupled heat pump (GCHP) systems have been built. The hybrid system uses both a ground-coupled heat exchanger and a cooling tower, thereby reducing the amount of ground-coupling heat exchanger necessary. Although this concept has been shown to be feasible, the performance of such a system has not been measured in detail. Since it may be possible to achieve significant performance improvements in such systems by modifying the design and operational practices, detailed performance monitoring of such systems is needed. This paper describes a project that has been undertaken to collect performance data from a hybrid GCHP system at Fort Polk, LA. This paper presents performance data for a period of about 22 months, including data from portions of two heating and cooling seasons. The energy input to the GCHPs themselves will be presented, as well as the energy rejected to the ground in the cooling mode and that extracted from the ground in the heating mode. Energy flows in the cooling tower also will be addressed, along with the power consumption of the circulating pumps and the cooling tower.

  13. Assessment of dynamic energy conversion systems for radioisotope heat sources

    SciTech Connect (OSTI)

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

    1985-06-01

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

  14. Fuel cell system with combustor-heated reformer

    DOE Patents [OSTI]

    Pettit, William Henry

    2000-01-01

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

  15. DOE Zero Energy Ready Home Case Study: Weiss Building & Development LLC,

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

    System Home, River Forest, IL | Department of Energy LLC, System Home, River Forest, IL DOE Zero Energy Ready Home Case Study: Weiss Building & Development LLC, System Home, River Forest, IL Case study of a DOE Zero Energy Ready Home in River Forest, IL, that scored HERS 17 without PV. This 4,763-square-foot custom passive house has R-54 ICF walls, a vented attic with R-100 blown fiberglass, plus R-40 rigid EPS under the slab, triple-pane windows, two ductless mini-split heat pumps, and

  16. Industrial Steam System Heat-Transfer SolutionsL: A BestPractices...

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

    Steam Technical Brief Industrial Steam System Heat-Transfer Solutions U.S. Department of ... performance Industrial Steam System Heat-Transfer Solutions 1 Introduction This ...

  17. Lamp system for uniform semiconductor wafer heating

    DOE Patents [OSTI]

    Zapata, Luis E.; Hackel, Lloyd

    2001-01-01

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

  18. Field performance of a premium heating oil

    SciTech Connect (OSTI)

    Santa, T.; Jetter, S.

    1997-01-01

    As part of ongoing research to provide quality improvements to heating oil, Mobil Oil together with Santa Fuel conducted a field trial to investigate the performance of a new premium heating oil. This premium heating oil contains an additive system designed to minimize sludge related problems in the fuel delivery system of residential home heating systems. The additive used was similar to others reported at this and earlier BNL conferences, but was further developed to enhance its performance in oil heat systems. The premium heating oil was bulk additized and delivered to a subset of the customer base. The performance of this premium heating oil is discussed.

  19. Electrically heated particulate filter diagnostic systems and methods

    DOE Patents [OSTI]

    Gonze, Eugene V [Pinckney, MI

    2009-09-29

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

  20. Tips: Heat Pumps | Department of Energy

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

    Clean or change filters once a month or as needed, and maintain the system according to manufacturer's instructions. Long-Term Savings Tip If you heat your home with electricity, ...

  1. Challenge Home Student Design Competition

    Broader source: Energy.gov [DOE]

    Check out student designs of zero energy ready homes -- homes that are so efficient they can produce as much energy as the use with a renewable energy system.

  2. Integrated thermal solar heat pump system

    SciTech Connect (OSTI)

    Shaw, D.N.

    1980-04-08

    A compression module may comprise a hermetic helical screw rotary compressor having injection and ejection ports in addition to discharge and suction ports or may comprise a multiple cylinder, multiple level, reciprocating compressor. The module incorporates a subcooler coil and is connected to an outside air coil, a thermal energy storage coil, a direct solar energy supply coil, one or more inside coils for the space to be conditioned and a hot water coil through common, discharge manifold, suction manifold, liquid drain manifold and liquid feed manifold, by suitable solenoid operated control valves and check valves. The solenoid operated control valves are selectively operated in response to system operating parameters. Seal pots and positive displacement pumps may operate to force liquid refrigerant condensed at intermediate pressure to flow to the receiver which is pressurized at a pressure corresponding to the condensation temperature of the highest pressure condensing coil in the system. Alternatively, liquid refrigerant expansion may be used to reach a common receiver pressure for all condenser returns.

  3. DOE Zero Energy Ready Home Case Study 2013: Nexus EnergyHomes...

    Energy Savers [EERE]

    ... A ground-source heat pump provides the home's heating and some of its hot water. A ground source heat pump is an electric heat pump that exchanges heat with the ground or ground ...

  4. Countercurrent direct contact heat exchange process and system

    DOE Patents [OSTI]

    Wahl, III, Edward F.; Boucher, Frederic B.

    1979-01-01

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

  5. An Overview of Liquid Fluoride Salt Heat Transport Systems

    SciTech Connect (OSTI)

    Holcomb, David Eugene; Cetiner, Sacit M

    2010-09-01

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

  6. DOE Zero Energy Ready Home Case Study: Ferguson Design and Construction Inc., Sagaponack, NY, Custom Home

    Broader source: Energy.gov [DOE]

    Case study of a DOE Zero Energy Ready Home in Long Island, NY, that scored HERS 43 without PV. This 5,088-square-foot custom home has R-25 double-stud walls, a vaulted roof with R-40 blown cellulose, R-10 XPS under slab, a hydro air system with 91% efficient boiler for forced air and radiant floor heat, and 100% LED lights.

  7. Energy-efficient mortgages and home energy rating systems: A report on the nation`s progress

    SciTech Connect (OSTI)

    Farhar, B.C.; Eckert, J.

    1993-09-01

    This report summarizes progress throughout the nation in establishing voluntary programs linking home energy rating systems (HERS) and energy-efficient mortgages (EEMs). These programs use methods for rating the energy efficiency of new and existing homes and predicting energy cost savings so lenders can factor in energy cost savings when underwriting mortgages. The programs also encourage lenders to finance cost-effective energy-efficiency improvements to existing homes with low-interest mortgages or other instruments. The money saved on utility bills over the long term can more than offset the cost of such energy-efficiency improvements. The National Collaborative on HERS and EEMs recommended that this report be prepared.

  8. Passiv Systems | Open Energy Information

    Open Energy Info (EERE)

    Place: England, United Kingdom Zip: RG14 2PZ Product: UK based developer of a home energy management system, covering heating, hot water and electrical appliances....

  9. New Home Rebate

    Broader source: Energy.gov [DOE]

    The Alaska Housing Finance Corporation (AFHC) provides rebates to Alaskans who purchase or build new, energy-efficient homes. AFHC uses the Home Energy Rating System index to determine the size of...

  10. Internal dust recirculation system for a fluidized bed heat exchanger

    DOE Patents [OSTI]

    Gamble, Robert L.; Garcia-Mallol, Juan A.

    1981-01-01

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

  11. Optimal Ground-Source Heat Pump System Design

    Broader source: Energy.gov [DOE]

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

  12. Waste heat recovery system for recapturing energy after engine aftertreatment systems

    SciTech Connect (OSTI)

    Ernst, Timothy C.; Nelson, Christopher R.

    2014-06-17

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

  13. printed-circuit heat exchanger PCHE

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

    printed-circuit heat exchanger PCHE - Sandia Energy Energy Search Icon Sandia Home ... SunShot Grand Challenge: Regional Test Centers printed-circuit heat exchanger PCHE Home...

  14. Hybrid sodium heat pipe receivers for dish/Stirling systems

    SciTech Connect (OSTI)

    Laing, D.; Reusch, M.

    1997-12-31

    The design of a hybrid solar/gas heat pipe receiver for the SBP 9 kW dish/Stirling system using a United Stirling AB V160 Stirling engine and the results of on-sun testing in alternative and parallel mode will be reported. The receiver is designed to transfer a thermal power of 35 kW. The heat pipe operates at around 800 C, working fluid is sodium. Operational options are solar-only, gas augmented and gas-only mode. Also the design of a second generation hybrid heat pipe receiver currently developed under a EU-funded project, based on the experience gained with the first hybrid receiver, will be reported. This receiver is designed for the improved SPB/L. and C.-10 kW dish/Stirling system with the reworked SOLO V161 Stirling engine.

  15. Thermally conductive cementitious grout for geothermal heat pump systems

    DOE Patents [OSTI]

    Allan, Marita

    2001-01-01

    A thermally conductive cement-sand grout for use with a geothermal heat pump system. The cement sand grout contains cement, silica sand, a superplasticizer, water and optionally bentonite. The present invention also includes a method of filling boreholes used for geothermal heat pump systems with the thermally conductive cement-sand grout. The cement-sand grout has improved thermal conductivity over neat cement and bentonite grouts, which allows shallower bore holes to be used to provide an equivalent heat transfer capacity. In addition, the cement-sand grouts of the present invention also provide improved bond strengths and decreased permeabilities. The cement-sand grouts can also contain blast furnace slag, fly ash, a thermoplastic air entraining agent, latex, a shrinkage reducing admixture, calcium oxide and combinations thereof.

  16. A "Plug-n-Play" Air Delivery System for Low-Load Homes and Evaluation of a

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

    Residential Thermal Comfort Rating Method | Department of Energy A "Plug-n-Play" Air Delivery System for Low-Load Homes and Evaluation of a Residential Thermal Comfort Rating Method A "Plug-n-Play" Air Delivery System for Low-Load Homes and Evaluation of a Residential Thermal Comfort Rating Method Traditional air distribution system. Graphic courtesy of IBACOS, Inc. Traditional air distribution system. Graphic courtesy of IBACOS, Inc. "Plug-n-Play" air delivery

  17. Preliminary business plan: Plzen district heating system upgrade

    SciTech Connect (OSTI)

    1996-06-01

    The district heating system of the City of Plzen, Czech Republic, needs to have physical upgrades to replace aging equipment and to comply with upcoming environmental regulations. Also, its ownership and management are being changed as a result of privatization. As majority owner, the City has the primary goal of ensuring that the heating needs of its customers are met as reliably and cost-effectively as possible. This preliminary business plan is part of the detailed analysis (5 reports in all) done to assist the City in deciding the issues. Preparation included investigation of ownership, management, and technology alternatives; estimation of market value of assets and investment requirements; and forecasting of future cash flow. The district heating system consists of the Central Plzen cogeneration plant, two interconnected heating plants [one supplying both hot water and steam], three satellite heating plants, and cooperative agreements with three industrial facilities generating steam and hot water. Most of the plants are coal-fired, with some peaking units fired by fuel oil.

  18. White Pine Co. Public School System Biomass Conversion Heating Project

    SciTech Connect (OSTI)

    Paul Johnson

    2005-11-01

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

  19. Development of Marine Thermoelectric Heat Recovery Systems | Department of

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

    Energy Discusses benefits of integration of thermoelectrics into the marine industry, research program milestones, and prototype TEG design and integration PDF icon wallace.pdf More Documents & Publications Development of Marine Thermoelectric Heat Recovery Systems PACCAR/Hi-Z Thermoelectric Generator Project Vehicular Thermoelectric Applications Session DEER 2009

  20. Development of Marine Thermoelectric Heat Recovery Systems | Department of

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

    Energy Thermoelectric generator prototypes are evaluated in a dedicated hybrid vessel test platform fabricated from an encapsulated lifeboat to optimize performance and reliability for marine industry applications PDF icon wallace.pdf More Documents & Publications Development of Marine Thermoelectric Heat Recovery Systems Vehicular Thermoelectrics: The New Green Technology Bi-directional dc-dc Converter

  1. Integrated exhaust and electrically heated particulate filter regeneration systems

    DOE Patents [OSTI]

    Gonze, Eugene V.; Paratore, Jr., Michael J.

    2013-01-08

    A system includes a particulate matter (PM) filter that includes multiple zones. An electrical heater includes heater segments that are associated with respective ones of the zones. The electrical heater is arranged upstream from and proximate with the PM filter. A post-fuel injection system injects fuel into at least one of a cylinder of an engine and an exhaust system. A control module is configured to operate in a first mode that includes activating the electrical heater to heat exhaust of the engine. The control module is also configured to operate in a second mode that includes activating the post-injection system to heat the exhaust. The control module selectively operates in at least one of the first mode and the second mode.

  2. Geothermal Heat Pumps

    Broader source: Energy.gov [DOE]

    Geothermal heat pumps are expensive to install but pay for themselves over time in reduced heating and cooling costs. Find out if one is right for your home.

  3. ARM - Atmospheric Heat Budget

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

    ListAtmospheric Heat Budget Outreach Home Room News Publications Traditional Knowledge ... Teachers' Toolbox Lesson Plans Atmospheric Heat Budget The average temperature of the ...

  4. Questar Gas- Residential Solar Assisted Water Heating Rebate Program

    Broader source: Energy.gov [DOE]

    Questar Gas provides incentives for residential customers to purchase and install solar water heating systems on their homes. Rebates of $750 per system are provided to customers of Questar who...

  5. Combined ICR heating antenna for ion separation systems

    SciTech Connect (OSTI)

    Timofeev, A. V. [Russian Research Centre Kurchatov Institute (Russian Federation)

    2011-01-15

    A combination of one- and two-wave antennas (one and two turns of conductors around a plasma cylinder, respectively) is proposed. This combined antenna localizes an RF field within itself. It is shown that spent nuclear fuel processing systems based on ICR heating of nuclear ash by such a combined antenna have high productivity. A theory of the RF field excitation in ICR ion separation systems is presented in a simple and compact form.

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

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

    Energy-Efficient Controls for Multifamily Domestic Hot Water | Department of Energy Energy-Efficient Controls for Multifamily Domestic Hot Water Building America Webinar: Central Multifamily Water Heating Systems - Energy-Efficient Controls for Multifamily Domestic Hot Water This presentation will be delivered at the U.S. Department of Energy Building America webinar on January 21, 2015, by Jordan Dentz and Eric Ansanelli of the Levy Partnership. Central domestic hot water (CDHW) systems are

  7. Diagnosis system to improve heat rate in fossil power plants

    SciTech Connect (OSTI)

    Arroyo-Figueroa, G.; Villavicencio R., A.

    1996-05-01

    Today fossil fuel power plants is showing a trend toward full automation. This increases the difficulty for human operators to follow in detail the progress of power plants, and also limit the contribution of human operators to diagnostic task. Therefore, automated and intelligent fault diagnostic systems have been intensively investigated. Despite several successful examples of diagnostic systems, often called expert systems, the development task of a diagnostic system still remains empiric and is unique for each system. This paper discusses the design of a Diagnostic System to improve Heat Rate for fossil fuel power plant. The approach is characterized as an fault tree diagnostic system. The prototype of this system has showed the benefits and the feasibility of using this system to diagnose equipment in power plants.

  8. Improving Process Heating System Performance: A Sourcebook for Industry, Third Edition

    Broader source: Energy.gov [DOE]

    This sourcebook introduces industry to process heating basics, performance opportunities for fuel and electric based systems, waste heat management and where they can find help on optimizing these...

  9. Load Preheating Using Flue Gases from a Fuel-Fired Heating System...

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

    ... Would the heat loss be considerable? 4. What type of ... Will an auxiliary heating system be needed? Resources See ... will mean a stronger economy, a cleaner environment, ...

  10. Improved Design Tools for Surface Water and Standing Column Well Heat Pump Systems

    Broader source: Energy.gov [DOE]

    This project will improve the capability of engineers to design heat pump systems that utilize surface water or standing column wells (SCW) as their heat sources and sinks.

  11. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange

    DOE Patents [OSTI]

    McBride, Troy O; Bell, Alexander; Bollinger, Benjamin R; Shang, Andrew; Chmiel, David; Richter, Horst; Magari, Patrick; Cameron, Benjamin

    2013-07-02

    In various embodiments, efficiency of energy storage and recovery systems compressing and expanding gas is improved via heat exchange between the gas and a heat-transfer fluid.

  12. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange

    DOE Patents [OSTI]

    McBride, Troy O.; Bell, Alexander; Bollinger, Benjamin R.

    2012-08-07

    In various embodiments, efficiency of energy storage and recovery systems compressing and expanding gas is improved via heat exchange between the gas and a heat-transfer fluid.

  13. Building America Case Study: Lancaster County Career and Technology Center Green Home 3, Mt Joy, Pennsylvania

    SciTech Connect (OSTI)

    Not Available

    2014-12-01

    Transitioning from standard light frame to a thermal mass wall system in a high performance home will require a higher level of design integration with the mechanical systems. The much higher mass in the ICF wall influences heat transfer through the wall and affects how the heating and cooling system responds to changing outdoor conditions. This is even more important for efficient, low-load homes with efficient heat pump systems in colder climates where the heating and cooling peak loads are significantly different from standard construction.This report analyzes a range of design features and component performance estimates in an effort to select practical, cost-effective solutions for high performance homes in a cold climate. Of primary interest is the influence of the ICF walls on developing an effective air sealing strategy and selecting an appropriate heating and cooling equipment type and capacity. The domestic water heating system is analyzed for costs and savings to investigate options for higher efficiency electric water heating. A method to ensure mechanical ventilation air flows is examined. The final solution package includes high-R mass walls, very low infiltration rates, multi-stage heat pump heating, solar thermal domestic hot water system, and energy recovery ventilation. This solution package can be used for homes to exceed 2012 International Energy Conservation Code requirements throughout all climate zones and achieves the DOE Challenge Home certification.

  14. Effects of Home Energy Management Systems on Distribution Utilities and Feeders Under Various Market Structures: Preprint

    SciTech Connect (OSTI)

    Ruth, Mark; Pratt, Annabelle; Lunacek, Monte; Mittal, Saurabh; Wu, Hongyu; Jones, Wesley

    2015-07-17

    The combination of distributed energy resources (DER) and retail tariff structures to provide benefits to both utility consumers and the utilities is poorly understood. To improve understanding, an Integrated Energy System Model (IESM) is being developed to simulate the physical and economic aspects of DER technologies, the buildings where they reside, and feeders servicing them. The IESM was used to simulate 20 houses with home energy management systems on a single feeder under a time of use tariff to estimate economic and physical impacts on both the households and the distribution utilities. HEMS reduce consumers’ electric bills by precooling houses in the hours before peak electricity pricing. Household savings are greater than the reduction utility net revenue indicating that HEMS can provide a societal benefit providing tariffs are structured so that utilities remain solvent. Utilization of HEMS reduce peak loads during high price hours but shifts it to hours with off-peak and shoulder prices and resulting in a higher peak load.

  15. DOE Zero Energy Ready Home Case Study: TC Legend Homes, Bellingham...

    Energy Savers [EERE]

    home has 6-in. SIP walls, a 10-in. SIP roof, and ICF foundation walls with R-20 high-density rigid EPS foam under the slab. A single ductless heat pump heats and cools the home,...

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

    SciTech Connect (OSTI)

    Vasilakis, A.D.

    1993-12-01

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

  17. Materials, Turbomachinery and Heat Exchangers for Supercritical CO2 Systems

    SciTech Connect (OSTI)

    Anderson, Mark; Nellis, Greg; Corradini, Michael

    2012-10-19

    The objective of this project is to produce the necessary data to evaluate the performance of the supercritical carbon dioxide cycle. The activities include a study of materials compatibility of various alloys at high temperatures, the heat transfer and pressure drop in compact heat exchanger units, and turbomachinery issues, primarily leakage rates through dynamic seals. This experimental work will serve as a test bed for model development and design calculations, and will help define further tests necessary to develop high-efficiency power conversion cycles for use on a variety of reactor designs, including the sodium fast reactor (SFR) and very high-temperature gas reactor (VHTR). The research will be broken into three separate tasks. The first task deals with the analysis of materials related to the high-temperature S-CO{sub 2} Brayton cycle. The most taxing materials issues with regard to the cycle are associated with the high temperatures in the reactor side heat exchanger and in the high-temperature turbine. The system could experience pressures as high as 20MPa and temperatures as high as 650°C. The second task deals with optimization of the heat exchangers required by the S-CO{sub 2} cycle; the S-CO{sub 2} flow passages in these heat exchangers are required whether the cycle is coupled with a VHTR or an SFR. At least three heat exchangers will be required: the pre-cooler before compression, the recuperator, and the heat exchanger that interfaces with the reactor coolant. Each of these heat exchangers is unique and must be optimized separately. The most challenging heat exchanger is likely the pre-cooler, as there is only about a 40°C temperature change but it operates close to the CO{sub 2} critical point, therefore inducing substantial changes in properties. The proposed research will focus on this most challenging component. The third task examines seal leakage through various dynamic seal designs under the conditions expected in the S-CO{sub 2} cycle, including supercritical, choked, and two-phase flow conditions.

  18. DOE Zero Energy Ready Home Case Study: Weiss Building & Development...

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

    Weiss Building & Development LLC, System Home, River Forest, IL DOE Zero Energy Ready Home Case Study: Weiss Building & Development LLC, System Home, River Forest, IL Case study of ...

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

    SciTech Connect (OSTI)

    Jiang Zhu; Yong X. Tao

    2011-11-01

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

  20. The changing character of household waste in the Czech Republic between 1999 and 2009 as a function of home heating methods

    SciTech Connect (OSTI)

    Dolealov, Markta; Beneov, Libue; Zvodsk, Anita

    2013-09-15

    Highlights: The character of household waste in the three different types of households were assesed. The quantity, density and composition of household waste were determined. The physicochemical characteristics were determined. The changing character of household waste during past 10 years was described. The potential of energy recovery of household waste in Czech republic was assesed. - Abstract: The authors of this paper report on the changing character of household waste, in the Czech Republic between 1999 and 2009 in households differentiated by their heating methods. The data presented are the result of two projects, financed by the Czech Ministry of Environment, which were undertaken during this time period with the aim of focusing on the waste characterisation and complete analysis of the physicochemical properties of the household waste. In the Czech Republic, the composition of household waste varies significantly between different types of households based on the methods of home heating employed. For the purposes of these studies, the types of homes were divided into three categories urban, mixed and rural. Some of the biggest differences were found in the quantities of certain subsample categories, especially fine residue (matter smaller than 20 mm), between urban households with central heating and rural households that primarily employ solid fuel such coal or wood. The use of these solid fuels increases the fraction of the finer categories because of the higher presence of ash. Heating values of the residual household waste from the three categories varied very significantly, ranging from 6.8 MJ/kg to 14.2 MJ/kg in 1999 and from 6.8 MJ/kg to 10.5 MJ/kg in 2009 depending on the type of household and season. The same factors affect moisture of residual household waste which varied from 23.2% to 33.3%. The chemical parameters also varied significantly, especially in the quantities of Tl, As, Cr, Zn, Fe and Mn, which were higher in rural households. Because knowledge about the properties of household waste, as well as its physicochemical characteristics, is very important not only for future waste management, but also for the prediction of the behaviour and influence of the waste on the environment as the country continues to streamline its legislation to the European Unions solid waste mandates, the results of these studies were employed by the Czech Ministry of Environment to optimise the national waste management strategy.

  1. QUIZ: Test your Home Energy IQ | Department of Energy

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

    QUIZ: Test your Home Energy IQ QUIZ: Test your Home Energy IQ Test your Home Energy IQ Find out if you are the brightest bulb when it comes to home energy use trivia! 1. What accounts for the most energy use in American homes? Heating and cooling Water heating Electronics and lighting Appliances According to the most recent Residential Energy Consumption Survey, heating and cooling accounted for 48 percent of total energy consumption in American homes. However, this number is down from 58

  2. Building America Technology Solutions for New and Existing Homes: Multifamily Central Heat Pump Water Heaters (Fact Sheet)

    Broader source: Energy.gov [DOE]

    To evaluate the performance of central heat pump water heaters for multifamily applications, the Alliance for Residential Building Innovation team monitored the performance of a 10.5 ton central HPWH installed on a student apartment building at the West Village Zero Net Energy Community in Davis, California, for 16 months.

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

    SciTech Connect (OSTI)

    Hong, Tainzhen; Liu, Xaiobing

    2009-11-01

    With the current movement toward net zero energy buildings, many technologies are promoted with emphasis on their superior energy efficiency. The variable refrigerant flow (VRF) and ground source heat pump (GSHP) systems are probably the most competitive technologies among these. However, there are few studies reporting the energy efficiency of VRF systems compared with GSHP systems. In this article, a preliminary comparison of energy efficiency between the air-source VRF and GSHP systems is presented. The computer simulation results show that GSHP system is more energy efficient than the air-source VRF system for conditioning a small office building in two selected US climates. In general, GSHP system is more energy efficient than the air-source VRV system, especially when the building has significant heating loads. For buildings with less heating loads, the GSHP system could still perform better than the air-source VRF system in terms of energy efficiency, but the resulting energy savings may be marginal.

  4. Heat Transfer Salts for Nuclear Reactor Systems - Chemistry

    Office of Scientific and Technical Information (OSTI)

    0-905 Heat Transfer Salts for Nuclear Reactor Systems - Chemistry Control, Corrosion Mitigation, and Modeling Reactor Concepts RD&D Dr. M ark Anderson U n iv e r s it y o f W i s c o n s i n , M a d i s o n In collaboration with: Pacific N o r t h w e s t N a t i o n a l La b o ra t o r y U n iv e r s it y o f California, B e r k e l e y Brian R o b i n s o n , Fede ra l POC M i c h a e l McKellar, Tec hnical POC Heat Transfer Salts for Nuclear Reactor Systems - chemistry control, corrosion

  5. DESIGN OF A COMPACT HEAT EXCHANGER FOR HEAT RECUPERATION FROM A HIGH TEMPERATURE ELECTROLYSIS SYSTEM

    SciTech Connect (OSTI)

    G. K. Housley; J.E. O'Brien; G.L. Hawkes

    2008-11-01

    Design details of a compact heat exchanger and supporting hardware for heat recuperation in a high-temperature electrolysis application are presented. The recuperative heat exchanger uses a vacuum-brazed plate-fin design and operates between 300 and 800C. It includes corrugated inserts for enhancement of heat transfer coefficients and extended heat transfer surface area. Two recuperative heat exchangers are required per each four-stack electrolysis module. The heat exchangers are mated to a base manifold unit that distributes the inlet and outlet flows to and from the four electrolysis stacks. Results of heat exchanger design calculations and assembly details are also presented.

  6. DOE Challenge Home Case Study: Near Zero Maine Home II, Vassalboro...

    Energy Savers [EERE]

    ... One minisplit heat pump provides all of the heating and cooling the 1,200-ft 2 home needs. ... the heat exchanger, then further warmed as it enters the living space near the heat pump. ...

  7. Steel Mill Powered by Waste Heat Recovery System | Department...

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

    efficient recovery boiler. Locations Indiana Partners ArcelorMittal USA, Inc. EERE Investment 31.6 million Clean Energy Sector Energy-saving homes, buildings, and manufacturing

  8. H. R. 3856: A Bill to amend the Internal Revenue Code of 1986 to impose an excise tax on windfall profits derived from home heating oil, and for other purposes. Introduced in the House of Representatives, One Hundredth First Congress, Second Session, January 23, 1990

    SciTech Connect (OSTI)

    Not Available

    1990-01-01

    The tax would be imposed on the producer or importer of the home heating oil. The amount of the tax would be 90 percent of the windfall profit on each barrel, which is defined as the gross profit over the producer's or importer's average gross profit per barrel from home heating oil sold during November 1989. If significant sales were not made by any person during November 1989, the amount will be determined by the Secretary based on national averages. The bill also establishes a Home Heating Oil Trust Fund to finance grants under the Low-Income Home Energy Assistance Act of 1981.

  9. Solar Water Heating: SPECIFICATION, CHECKLIST AND GUIDE

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

    Water Heating SPECIFICATION, CHECKLIST AND GUIDE Renewable Energy Ready Home Table of ... Assumptions of the RERH Solar Water Heating Specification ...

  10. Coast Electric Power Association- Comfort Advantage Home Program

    Broader source: Energy.gov [DOE]

    Coast Electric Power Association (CEPA) provides rebates on heat pumps for new homes which meet certain weatherization standards. To qualify for this rebate the home must have:

  11. DOE Zero Energy Ready Home Case Study: Clifton View Homes, Coupeville...

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

    DOE Zero Energy Ready Home Case Study: Clifton View Homes, Coupeville, WA, Systems Home Case study of a DOE Zero Energy Ready Home on Whidbey Island, WA, that scored HERS 45 ...

  12. DOE Zero Energy Ready Home Case Study: Nexus EnergyHomes, Frederick, Maryland

    SciTech Connect (OSTI)

    none,

    2013-09-01

    This urban infill community with 24 duplexes, 19 townhomes, and 7 single-family homes features SIP walls, geothermal heat pumps, solar PV, and a proprietary energy management system. The builder won a 2013 Housing Innovation Award in the production builder category.

  13. Prototype House Provides Test Case for Energy-Efficient Systems: Mitchell Homes - Pensacola, Florida

    SciTech Connect (OSTI)

    2000-01-01

    This document describes the energy-efficient Mitchell Homes in Pensacola, Florida, which are energy efficient test houses utilizing a whole building approach.

  14. WORKING PARK-FUEL CELL COMBINED HEAT AND POWER SYSTEM

    SciTech Connect (OSTI)

    Allan Jones

    2003-09-01

    This report covers the aims and objectives of the project which was to design, install and operate a fuel cell combined heat and power (CHP) system in Woking Park, the first fuel cell CHP system in the United Kingdom. The report also covers the benefits that were expected to accrue from the work in an understanding of the full technology procurement process (including planning, design, installation, operation and maintenance), the economic and environmental performance in comparison with both conventional UK fuel supply and conventional CHP and the commercial viability of fuel cell CHP energy supply in the new deregulated energy markets.

  15. Effects of Home Energy Management Systems on Distribution Utilities and Feeders Under Various Market Structure; NREL (National Renewable Energy Laboratory)

    SciTech Connect (OSTI)

    Ruth, M.; Pratt, A.; Lunacek, M.; Mittal, S.; Wu, H.; Jones, W.

    2015-06-15

    The combination of distributed energy resources (DER) and retail tariff structures to provide benefits to both utility consumers and the utilities is not well understood. To improve understanding, an Integrated Energy System Model (IESM) is being developed to simulate the physical and economic aspects of DER technologies, the buildings where they reside, and feeders servicing them. The IESM was used to simulate 20 houses with home energy management systems on a single feeder under a time-of-use (TOU) tariff to estimate economic and physical impacts on both the households and the distribution utilities. Home energy management systems (HEMS) reduce consumers’ electric bills by precooling houses in the hours before peak electricity pricing. Utilization of HEMS reduce peak loads during high price hours but shifts it to hours with off-peak and shoulder prices, resulting in a higher peak load. used to simulate 20 houses with home energy management systems on a single feeder under a time-of-use (TOU) tariff to estimate economic and physical impacts on both the households and the distribution utilities. Home energy management systems (HEMS) reduce consumers’ electric bills by precooling houses in the hours before peak electricity pricing. Utilization of HEMS reduce peak loads during high price hours but shifts it to hours with off-peak and shoulder prices, resulting in a higher peak load.

  16. Wood and Pellet Heating | Department of Energy

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

    Home Heating Systems » Wood and Pellet Heating Wood and Pellet Heating A wood stove on a stone hearth. | Photo courtesy of ©iStockphoto/King_Louie A wood stove on a stone hearth. | Photo courtesy of ©iStockphoto/King_Louie Today you can choose from a new generation of wood- and pellet-burning appliances that are cleaner burning, more efficient, and powerful enough to heat many average-sized, modern homes. Pellet fuel appliances burn small pellets that measure 3/8 to 1 inch in length.

  17. Situ soil sampling probe system with heated transfer line

    DOE Patents [OSTI]

    Robbat, Jr., Albert

    2002-01-01

    The present invention is directed both to an improved in situ penetrometer probe and to a heated, flexible transfer line. The line and probe may be implemented together in a penetrometer system in which the transfer line is used to connect the probe to a collector/analyzer at the surface. The probe comprises a heater that controls a temperature of a geologic medium surrounding the probe. At least one carrier gas port and vapor collection port are located on an external side wall of the probe. The carrier gas port provides a carrier gas into the geologic medium, and the collection port captures vapors from the geologic medium for analysis. In the transfer line, a flexible collection line that conveys a collected fluid, i.e., vapor, sample to a collector/analyzer. A flexible carrier gas line conveys a carrier gas to facilitate the collection of the sample. A system heating the collection line is also provided. Preferably the collection line is electrically conductive so that an electrical power source can generate a current through it so that the internal resistance generates heat.

  18. Building America Whole-House Solutions for Existing Homes: Inverted Attic

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

    Bulkhead for HVAC Ductwork | Department of Energy Inverted Attic Bulkhead for HVAC Ductwork Building America Whole-House Solutions for Existing Homes: Inverted Attic Bulkhead for HVAC Ductwork This occupied test home received a modified truss system to accommodate ductwork within an inverted insulated bulkhead along the attic floor, which saves energy by placing heating, ventilating, and air-conditioning (HVAC) ductwork within the home's thermal boundary. PDF icon Inverted Attic Bulkhead for

  19. RDI's Wisdom Way Solar Village Final Report: Includes Utility Bill Analysis of Occupied Homes

    SciTech Connect (OSTI)

    Robb Aldrich, Steven Winter Associates

    2011-07-01

    In 2010, Rural Development, Inc. (RDI) completed construction of Wisdom Way Solar Village (WWSV), a community of ten duplexes (20 homes) in Greenfield, MA. RDI was committed to very low energy use from the beginning of the design process throughout construction. Key features include: 1. Careful site plan so that all homes have solar access (for active and passive); 2. Cellulose insulation providing R-40 walls, R-50 ceiling, and R-40 floors; 3. Triple-pane windows; 4. Airtight construction (~0.1 CFM50/ft2 enclosure area); 5. Solar water heating systems with tankless, gas, auxiliary heaters; 6. PV systems (2.8 or 3.4kWSTC); 7. 2-4 bedrooms, 1,100-1,700 ft2. The design heating loads in the homes were so small that each home is heated with a single, sealed-combustion, natural gas room heater. The cost savings from the simple HVAC systems made possible the tremendous investments in the homes' envelopes. The Consortium for Advanced Residential Buildings (CARB) monitored temperatures and comfort in several homes during the winter of 2009-2010. In the Spring of 2011, CARB obtained utility bill information from 13 occupied homes. Because of efficient lights, appliances, and conscientious home occupants, the energy generated by the solar electric systems exceeded the electric energy used in most homes. Most homes, in fact, had a net credit from the electric utility over the course of a year. On the natural gas side, total gas costs averaged $377 per year (for heating, water heating, cooking, and clothes drying). Total energy costs were even less - $337 per year, including all utility fees. The highest annual energy bill for any home evaluated was $458; the lowest was $171.

  20. Experimental investigation on the photovoltaic-thermal solar heat pump air-conditioning system on water-heating mode

    SciTech Connect (OSTI)

    Fang, Guiyin; Hu, Hainan; Liu, Xu

    2010-09-15

    An experimental study on operation performance of photovoltaic-thermal solar heat pump air-conditioning system was conducted in this paper. The experimental system of photovoltaic-thermal solar heat pump air-conditioning system was set up. The performance parameters such as the evaporation pressure, the condensation pressure and the coefficient of performance (COP) of heat pump air-conditioning system, the water temperature and receiving heat capacity in water heater, the photovoltaic (PV) module temperature and the photovoltaic efficiency were investigated. The experimental results show that the mean photovoltaic efficiency of photovoltaic-thermal (PV/T) solar heat pump air-conditioning system reaches 10.4%, and can improve 23.8% in comparison with that of the conventional photovoltaic module, the mean COP of heat pump air-conditioning system may attain 2.88 and the water temperature in water heater can increase to 42 C. These results indicate that the photovoltaic-thermal solar heat pump air-conditioning system has better performances and can stably work. (author)

  1. CAES Home

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

    CAES Home Home About Us Contact Information Our CAES Building FAQs Affiliated Centers Research Core Capabilities Laboratories and Equipment Technology Transfer Visualization CAVE...

  2. CAES Home

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

    View all events >> x CAES Home Home About Us Contact Information Our CAES Building FAQs Affiliated Centers Research Core Capabilities Laboratories and Equipment Technology Transfer...

  3. CAES Home

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

    User ID: Password: Log In Forgot your password? CAES Home Home About Us Contact Information Our CAES Building FAQs Affiliated Centers Research Core Capabilities Laboratories and...

  4. Multifamily Individual Heating and Ventilation Systems, Lawrence, Massachusetts (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-11-01

    The conversion of an older Massachusetts building into condominiums illustrates a safe, durable, and cost-effective solution for heating and ventilation systems that can potentially benefit millions of multifamily buildings. Merrimack Valley Habitat for Humanity (MVHfH) partnered with U.S. Department of Energy Building America team Building Science Corporation (BSC) to provide high performance affordable housing for 10 families in the retrofit of an existing mass masonry building (a former convent). The original ventilation design for the project was provided by a local engineer and consisted of a single large heat recovery ventilator (HRV) located in a mechanical room in the basement with a centralized duct system providing supply air to the main living space and exhausting stale air from the single bathroom in each apartment. This design was deemed to be far too costly to install and operate for several reasons: the large central HRV was oversized and the specified flows to each apartment were much higher than the ASHRAE 62.2 rate; an extensive system of ductwork, smoke and fire dampers, and duct chases were specified; ductwork required a significant area of dropped ceilings; and the system lacked individual ventilation control in the apartments

  5. 1-10 kW Stationary Combined Heat and Power Systems Status and...

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

    1-10 kW Stationary Combined Heat and Power Systems Status and Technical Potential: Independent Review 1-10 kW Stationary Combined Heat and Power Systems Status and Technical...

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

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

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

  7. Reduction of pumping energy losses in district heating and cooling systems

    SciTech Connect (OSTI)

    Zakin, J.L.; Christensen, R.N.

    1992-10-01

    This project was designed to find effective surfactant friction reducing additives for use in district heating systems with temperatures of 50 to 90[degrees]C and effective additives fore district cooling systems with temperatures of 5 to 15[degrees]C. Heat transfer measurements in conventional shell and tube heat exchangers and in plate heat exchangers were also carried out to see how seriously these surfactant drag reducing additives reduce heat transfer coefficients.

  8. Reduction of pumping energy losses in district heating and cooling systems. Final report

    SciTech Connect (OSTI)

    Zakin, J.L.; Christensen, R.N.

    1992-10-01

    This project was designed to find effective surfactant friction reducing additives for use in district heating systems with temperatures of 50 to 90{degrees}C and effective additives fore district cooling systems with temperatures of 5 to 15{degrees}C. Heat transfer measurements in conventional shell and tube heat exchangers and in plate heat exchangers were also carried out to see how seriously these surfactant drag reducing additives reduce heat transfer coefficients.

  9. DOE Zero Energy Ready Home Case Study: e2 Homes, Winter Park, FL, Custom

    Energy Savers [EERE]

    Homes | Department of Energy e2 Homes, Winter Park, FL, Custom Homes DOE Zero Energy Ready Home Case Study: e2 Homes, Winter Park, FL, Custom Homes Case study of a DOE Zero Energy Ready Home in Winter Park, FL, that scored HERS 57 without PV or HERS -7 with PV. This 4,305-square-foot custom home has autoclaved aerated concrete walls, a sealed attic with R-20 spray foam, and ductless mini-split heat pumps. PDF icon BA_ZeroEnergyReady_e2Homes_062414.pdf More Documents & Publications

  10. DOE Zero Energy Ready Home Case Study: e2 Homes, Winter Park, FL, Custom

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

    Homes | Department of Energy e2 Homes, Winter Park, FL, Custom Homes DOE Zero Energy Ready Home Case Study: e2 Homes, Winter Park, FL, Custom Homes Case study of a DOE Zero Energy Ready Home in Winter Park, FL, that scored HERS 57 without PV or HERS -7 with PV. This 4,305-square-foot custom home has autoclaved aerated concrete walls, a sealed attic with R-20 spray foam, and ductless mini-split heat pumps. PDF icon BA_ZeroEnergyReady_e2Homes_062414.pdf More Documents & Publications

  11. City of Palo Alto Utilities- Solar Water Heating Program

    Broader source: Energy.gov [DOE]

    City of Palo Alto Utilities is offering incentives for their residential, commercial and industrial customers to install solar water heating systems on their homes and facilities with a goal of 1...

  12. Low and high Temperature Dual Thermoelectric Generation Waste Heat Recovery System for Light-Duty Vehicles

    Broader source: Energy.gov [DOE]

    Developing a low and high temperature dual thermoelectric generation waste heat recovery system for light-duty vehicles.

  13. High Temperature Variable Conductance Heat Pipes for Radioisotope Stirling Systems

    SciTech Connect (OSTI)

    Tarau, Calin; Walker, Kara L.; Anderson, William G.

    2009-03-16

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

  14. Heat and mass transfer in open-cycle OTEC systems

    SciTech Connect (OSTI)

    Bharathan, D.; Kreith, F.; Owens, W.L.; Schlepp, D.

    1984-01-01

    The temperature difference between surface and deep water in the oceans represents a vast resource of thermal energy. A promising method of harnessing this resource is the open-cycle ocean thermal energy conversion (OC-OTEC) system, which utilizes steam evaporated from the surface water to power the turbine. In this paper the state of the art of heat and mass transfer related to evaporation and condensation of steam at low pressures in OC-OTEC is summarized and relevant research issues are discussed.

  15. Solar Water Heating with Low-Cost Plastic Systems

    SciTech Connect (OSTI)

    2012-01-01

    Federal buildings consumed over 392,000 billion Btu of site delivered energy for buildings during FY 2007 at a total cost of $6.5 billion. Earlier data indicate that about 10% of this is used to heat water.[2] Targeting energy consumption in Federal buildings, the Energy Independence and Security Act of 2007 (EISA) requires new Federal buildings and major renovations to meet 30% of their hot water demand with solar energy, provided it is cost-effective over the life of the system. In October 2009, President Obama expanded the energy reduction and performance requirements of EISA and its subsequent regulations with his Executive Order 13514.

  16. DOE Challenge Home Case Study, New Town Builders, Denver, CO...

    Energy Savers [EERE]

    system. "The Challenge Home was the next step up for us," said Bill Rectanus, vice president of ... all of the home's remaining electric use, bringing the home's HERS ...

  17. Sandia Energy - Price Premiums for Solar Home Sales

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

    Price Premiums for Solar Home Sales Home Renewable Energy Energy Partnership News News & Events Photovoltaic Solar Systems Analysis Price Premiums for Solar Home Sales Previous...

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

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

    Delivery in Low Load Homes (Fact Sheet) Building America Technology Solutions for New and Existing Homes: Air-to-Water Heat Pumps with Radiant Delivery in Low Load Homes (Fact ...

  19. DOE Zero Energy Ready Home Case Study 2013: Dwell Development...

    Energy Savers [EERE]

    ... RENEWABLE READY meets EPA Renewable Energy- Ready Home. 1 2 3 4 5 6 7 DOE ZERO ENERGY READY HOME Dwell Development 3 The home's one mini-split heat pump is almost overkill given ...

  20. Building America Whole-House Solutions for New Homes: Urbane Homes,

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

    Louisville, Kentucky | Department of Energy Urbane Homes, Louisville, Kentucky Building America Whole-House Solutions for New Homes: Urbane Homes, Louisville, Kentucky Case study of Urbane Homes who worked with Building America research partner NAHBRC to build HERS-57 homes with rigid foam insulated slabs and foundation walls, advanced framed walls, high-efficiency heat pumps, and ducts in conditioned space. PDF icon Urbane Homes - Louisville, KY More Documents & Publications High

  1. Control system analysis for off-peak auxiliary heating of passive solar systems

    SciTech Connect (OSTI)

    Murray, H.S.; Melsa, J.L.; Balcomb, J.D.

    1980-01-01

    A computer simulation method is presented for the design of an electrical auxiliary energy system for passive solar heated structures. The system consists of electrical mats buried in the ground underneath the structure. Energy is stored in the ground during utility off-peak hours and released passively to the heated enclosure. An optimal control strategy is used to determine the system design parameters of depth of mat placement and minimum instaled electrical heating capacity. The optimal control applies combinations of fixed duration energy pulses to the heater, which minimize the room temperature error-squared for each day, assuming advance knowledge of the day's weather. Various realizable control schemes are investigated in an attempt to find a system that approaches the performance of the optimal control system.

  2. Drain-Water Heat Recovery | Department of Energy

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

    Water Heating » Drain-Water Heat Recovery Drain-Water Heat Recovery Diagram of a drain water heat recovery system. Diagram of a drain water heat recovery system. Any hot water that goes down the drain carries away energy with it. That's typically 80%-90% of the energy used to heat water in a home. Drain-water (or greywater) heat recovery systems capture this energy from water you've already used (for example, to shower, wash dishes, or wash clothing) to preheat cold water entering the water

  3. Characterization of emissions from a fluidized-bed wood chip home heating furnace. Final report Apr 82-May 83

    SciTech Connect (OSTI)

    Truesdale, R.S.

    1984-03-01

    The report gives results of measurements of emissions from a residential wood-chip combustor, operated in both a fluidized-bed and cyclone-fired mode, and their comparison with those from a conventional woodstove and industrial wood-fired boilers. In general, the combustion efficiency of the fluidized-bed and cyclone-fired wood-chip burner is higher than that of conventional woodstoves. Concomitant with this increase in efficiency is a decrease in most emissions. For the fluidized-bed tests, significant reductions of total hydrocarbons and CO were observed, compared to woodstove emissions. The cyclone test showed PAH levels far below those of conventional woodstoves, approaching levels measured in industrial wood-fired boilers. A baghouse, installed during two fluidized-bed tests, was extremely effective in reducing both particulate and PAH emissions. Method 5 samples from above the fluid bed suggest that appreciable PAH is formed in the upper region of the furnace or in the watertube heat exchangers. In general, the cyclone-fired mode was more effective in reducing emissions from residential wood combustion than the fluidized-bed mode.

  4. CWS-Fired Residential Warm-Air Heating System

    SciTech Connect (OSTI)

    Balsavich, J.; Becker, F.E.; Smolensky, L.A.

    1989-07-01

    During the report period, work continued on the life-cycle testing, optimization and refining of the second-generation furnace assembly, which comprises all the major furnace components: The combustor, heat exchanger, and baghouse, as well as the auxiliary subsystems. The furnace has operated for about 90 hours, and has burned 1,000 pounds of CWS. During testing, the only maintenance that was performed on the system was to clean the bag filters to obtain ash samples for analysts. Concurrent with testing the second-generation furnace, fabrication and assembly of the third-generation furnace was completed, and a life-cycle testing and optimization process for this furnace has started. In contrast to the second-generation furnace, which was designed more as an experimental unit, the third-generation furnace is a stand-alone heating unit Incorporating the standard air handling system, blower, pump, and control box as part of the furnace. During the report period, the third-generation furnace operated for a total of 35 hours, and burned more than 300 pounds of CWS, with average tests lasting 6 hours. During the next quarter, life-cycle testing of the third-generation furnace will continue to identify areas needing further development.

  5. The Stirling alternative. Power systems, refrigerants and heat pumps

    SciTech Connect (OSTI)

    Walker, G.; Reader, G.; Fauvel, O.R.; Bingham, E.R. )

    1993-01-01

    This book provides an up-to-date reference on the technology, history, and practical applications of Stirling engines, including recent developments in the field and a convenient survey of the Stirling engine literature. The topics of the book include: fundamentals of Stirling technology, definition and terminology, thermodynamic laws and cycles: some elementary considerations, the Stirling cycle, practical regenerative cycle, theoretical aspects and computer simulation of Stirling machines, mechanical arrangements, control systems, heat exchangers, performance characteristics, working fluids, applications of Stirling machines, advantages of Stirling machines, disadvantages of Stirling machines, Stirling versus internal combustion engines, Stirling versus Rankine engines, applications for Stirling machines, Stirling power systems, the literature and sources of supply, the literature of Stirling engines, and the literature of cryocoolers.

  6. Building America Technology Solutions for New and Existing Homes:Hydronic

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

    Systems Designing for Setback Operations | Department of Energy Existing Homes:Hydronic Systems Designing for Setback Operations Building America Technology Solutions for New and Existing Homes:Hydronic Systems Designing for Setback Operations This guide, developed by Consortium for Advanced Residential Buildings, provides step-by-step instructions for heating contractors and hydronic designers for selecting the proper control settings to maximize system performance and improve response time

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

    SciTech Connect (OSTI)

    Not Available

    2008-02-01

    This is one in a series of sourcebooks to help manufacturers optimize their industrial systems; this particular sourcebook addresses process heating systems.

  8. Home and Building Technology Basics | Department of Energy

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

    Home and Building Technology Basics Home and Building Technology Basics Homes and other buildings use energy every day for space heating and cooling, for lighting and hot water, and for appliances and electronics. Today's buildings consume more energy than any other sector of the U.S. economy, including transportation and industry. Learn more about: Heating and Cooling Passive Solar Design Water Heating Lighting and Daylighting Energy Basics Home Renewable Energy Homes & Buildings Lighting

  9. DOE Zero Energy Ready Home Case Study: KB Home, San Marcos, CA, Production

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

    Home | Department of Energy San Marcos, CA, Production Home DOE Zero Energy Ready Home Case Study: KB Home, San Marcos, CA, Production Home Case study of a DOE Zero Energy Ready Home in San Marcos, CA that scored HERS 52 without PV, -4 with PV. This 52,778-square-foot production home has R-20 advanced framed walls with batts plus rigid foam sheathing, an air-source heat pump for central air in sealed attic, solar water heating and 100% LED lighting. PDF icon BA_ZeroEnergyReady_KB

  10. 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.

  11. 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.

  12. Dual Loop Parallel/Series Waste Heat Recovery System | Department of Energy

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

    This system captures all the jacket water, intercooler, and exhaust heat from the engine by utilizing a single condenser to reject leftover heat to the atmosphere. PDF icon p-04_cook.pdf More Documents & Publications Light weight and economical exhaust heat exchanger for waste heat recovery using mixed radiant and convective heat transfer CNG-Hybrid: A Practical Path to "Net Zero Emissions" in Commuter Rail Identification and Evaluation of Near-term Opportunities for Efficiency

  13. Microsoft Word - Heating Oil Season.docx

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

    4-2015 Heating Oil Season Northeast Home Heating Oil Reserve Trigger Mechanism (Cents per Gallon, Except Where Noted) Week Residential Heating Oil Price Average Brent Spot Price...

  14. Technology Case Studies: Retrofit Integrated Space and Water Heating - Field Assessment

    SciTech Connect (OSTI)

    2014-05-01

    Better insulation and tighter envelopes are reducing space heating loads for new and existing homes. For many homes, decreased space heating loads make it possible for both space and domestic water heating loads to be provided with a single heating plant. This project analyzed combined condensing water heaters or boilers and hydronic air coils to provide high efficiency domestic hot water and forced air space heating. Called 'Combi' systems, they provided similar space and water heating performance less expensively than installing two condensing appliances. These systems can also eliminate safety issues associated with natural draft appliances through the use of one common sealed combustion vent.

  15. Stirling cycle heat pump for heating and/or cooling systems

    SciTech Connect (OSTI)

    Meijer, R.J.; Khalili, K.; Meijer, E.; Godett, T.M.

    1991-03-05

    This patent describes a duplex Stirling cycle machine acting as a heat pump. It comprises: a Stirling engine having pistons axially displaceable within parallel cylinders, the engine further having a swashplate rotatable about an axis of, rotation parallel to the cylinders and defining a plane inclined from the axis of rotation. The pistons connected to the swashplate via crossheads whereby axial displacement of the pistons is converted to rotation of the swashplate, and a Stirling cycle heat pump having a compression heat exchanger, an expansion heat exchanger and a regenerator with pistons equal in number to the engine pistons and axially displaceable within cylinders which are oriented co-axially with the engine cylinders. The crossheads further connected to the heat pump pistons whereby the heat pump pistons move simultaneously with the engine pistons over an equal stroke distance.

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

    Broader source: Energy.gov [DOE]

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

  17. Air Sealing Your Home | Department of Energy

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

    Your Home Air Sealing Your Home Save on heating and cooling costs by checking for air leaks in common trouble spots in your home. Save on heating and cooling costs by checking for air leaks in common trouble spots in your home. Reducing the amount of air that leaks in and out of your home is a cost-effective way to cut heating and cooling costs, improve durability, increase comfort, and create a healthier indoor environment. Caulking and weatherstripping are two simple and effective air-sealing

  18. Heat exchanger selection and design analyses for metal hydride heat pump systems

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

    Mazzucco, Andrea; Voskuilen, Tyler G.; Waters, Essene L.; Pourpoint, Timothee L.; Rokni, Masoud

    2016-01-01

    This paper presents a design analysis for the development of highly efficient heat exchangers within stationary metal hydride heat pumps. The design constraints and selected performance criteria are applied to three representative heat exchangers. The proposed thermal model can be applied to select the most efficient heat exchanger design and provides outcomes generally valid in a pre-design stage. Heat transfer effectiveness is the principal performance parameter guiding the selection analysis, the results of which appear to be mildly (up to 13%) affected by the specific Nusselt correlation used. The thermo-physical properties of the heat transfer medium and geometrical parameters aremore » varied in the sensitivity analysis, suggesting that the length of independent tubes is the physical parameter that influences the performance of the heat exchangers the most. The practical operative regions for each heat exchanger are identified by finding the conditions over which the heat removal from the solid bed enables a complete and continuous hydriding reaction. The most efficient solution is a design example that achieves the target effectiveness of 95%.« less

  19. Heat exchanger selection and design analyses for metal hydride heat pump systems

    SciTech Connect (OSTI)

    Mazzucco, Andrea; Voskuilen, Tyler G.; Waters, Essene L.; Pourpoint, Timothee L.; Rokni, Masoud

    2016-01-01

    This paper presents a design analysis for the development of highly efficient heat exchangers within stationary metal hydride heat pumps. The design constraints and selected performance criteria are applied to three representative heat exchangers. The proposed thermal model can be applied to select the most efficient heat exchanger design and provides outcomes generally valid in a pre-design stage. Heat transfer effectiveness is the principal performance parameter guiding the selection analysis, the results of which appear to be mildly (up to 13%) affected by the specific Nusselt correlation used. The thermo-physical properties of the heat transfer medium and geometrical parameters are varied in the sensitivity analysis, suggesting that the length of independent tubes is the physical parameter that influences the performance of the heat exchangers the most. The practical operative regions for each heat exchanger are identified by finding the conditions over which the heat removal from the solid bed enables a complete and continuous hydriding reaction. The most efficient solution is a design example that achieves the target effectiveness of 95%.

  20. Water Heating | Department of Energy

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

    Public Services Homes Water Heating Water Heating Infographic: Water Heaters 101 Infographic: Water Heaters 101 Everything you need to know about saving money on water...

  1. IMPACTS OF REFRIGERANTLINE LENGTH ON SYSTEM EFFICIENCY IN RESIDENTIAL HEATING AND COOLING SYSTEMS USING REFRIGERANT DISTRIBUTION.

    SciTech Connect (OSTI)

    ANDREWS, J.W.

    2001-04-01

    The effects on system efficiency of excess refrigerant line length are calculated for an idealized residential heating and cooling system. By excess line length is meant refrigerant tubing in excess of the 25 R provided for in standard equipment efficiency test methods. The purpose of the calculation is to provide input for a proposed method for evaluating refrigerant distribution system efficiency. A refrigerant distribution system uses refrigerant (instead of ducts or pipes) to carry heat and/or cooling effect from the equipment to the spaces in the building in which it is used. Such systems would include so-called mini-splits as well as more conventional split systems that for one reason or another have the indoor and outdoor coils separated by more than 25 ft. This report performs first-order calculations of the effects on system efficiency, in both the heating and cooling modes, of pressure drops within the refrigerant lines and of heat transfer between the refrigerant lines and the space surrounding them.

  2. Solar Energy Home | Open Energy Information

    Open Energy Info (EERE)

    Home Jump to: navigation, search Name: Solar Energy Home Address: 28 Church Road Place: London, United Kingdom Sector: Solar Product: Solar energy systems and equipment Phone...

  3. Automated Home Energy Management Standing Technical Committee...

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

    ... Examples for Sensor Topics Strategically Placed Occupancy Sensors Outdoor Weather Data from Internet Smart Thermostats to meet occupant comfort needs Home Security System Home is ...

  4. Solar Water Heating with Low-Cost Plastic Systems (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2012-01-01

    Newly developed solar water heating technology can help Federal agencies cost effectively meet the EISA requirements for solar water heating in new construction and major renovations. This document provides design considerations, application, economics, and maintenance information and resources.

  5. Load Preheating Using Flue Gases from a Fuel-Fired Heating System...

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

    Load Preheating Using Flue Gases from a Fuel-Fired Heating System This tip sheet discusses ... PROCESS HEATING TIP SHEET 9 PDF icon Load Preheating Using Flue Gases from a Fuel-Fired ...

  6. Analysis of a graphite foam-NaCl latent heat storage system for...

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

    Analysis of a graphite foam-NaCl latent heat storage system for supercritical CO2 power cycles for concentrated solar power Title Analysis of a graphite foam-NaCl latent heat...

  7. Novel Controls for Economic Dispatch of Combined Cooling, Heating and Power (CCHP) Systems

    Broader source: Energy.gov [DOE]

    The emergence of technologies that efficiently convert heat into cooling, such as absorption chillers, has opened up many new opportunities and markets for combined heat and power systems. These...

  8. Combined Heat and Power Systems (CHP): Capabilities (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-07-01

    D&MT Capabilities fact sheet that describes the NREL capabilities related to combined heat and power (CHP).

  9. DOE Zero Energy Ready Home Case Study 2014: TC Legend Homes,...

    Energy Savers [EERE]

    ... Radiant heating loops with hot water from an air-to-water heat pump provide radiant heat to the home. ENERGY STAR appliances, an induction cooktop, and 100% LED lighting help to ...

  10. DOE Zero Energy Ready Home Case Study: Clifton View Homes, Whidbey...

    Energy Savers [EERE]

    SIP above-grade walls, a 10.25-in. SIP roof, and triple-pane windows. The home has a ground-source heat pump provides radiant floor heat plus passive solar heating from large...

  11. Method for controlling exhaust gas heat recovery systems in vehicles

    DOE Patents [OSTI]

    Spohn, Brian L.; Claypole, George M.; Starr, Richard D

    2013-06-11

    A method of operating a vehicle including an engine, a transmission, an exhaust gas heat recovery (EGHR) heat exchanger, and an oil-to-water heat exchanger providing selective heat-exchange communication between the engine and transmission. The method includes controlling a two-way valve, which is configured to be set to one of an engine position and a transmission position. The engine position allows heat-exchange communication between the EGHR heat exchanger and the engine, but does not allow heat-exchange communication between the EGHR heat exchanger and the oil-to-water heat exchanger. The transmission position allows heat-exchange communication between the EGHR heat exchanger, the oil-to-water heat exchanger, and the engine. The method also includes monitoring an ambient air temperature and comparing the monitored ambient air temperature to a predetermined cold ambient temperature. If the monitored ambient air temperature is greater than the predetermined cold ambient temperature, the two-way valve is set to the transmission position.

  12. Tank waste remediation system heat stress control program report, 1995

    SciTech Connect (OSTI)

    Carls, D.R.

    1995-09-28

    Protecting employees from heat stress within tank farms during the summer months is challenging. Work constraints typically experienced in tank farms complicate the measures taken to protect employees from heat stress. TWRS-Industrial Hygiene (IH) has endeavored to control heat stress injuries by anticipating, recognizing, evaluating and controlling the factors which lead or contribute to heat stress in Tank Farms. The TWRS Heat Stress Control Program covers such areas as: employee and PIC training, communication of daily heat stress alerts to tank farm personnel, setting work/rest regimens, and the use of engineering and personal protective controls when applicable. The program has increased worker awareness of heat stress and prevention, established provisions for worker rest periods, increased drinking water availability to help ensure worker hydration, and allowed for the increased use of other protective controls to combat heat stress. The TWRS Heat Stress Control Program is the cornerstone for controlling heat stress among tank farm employees. The program has made great strides since it`s inception during the summer of 1994. Some improvements can still be made to enhance the program for the summer of 1996, such as: (1) procurement and use of personal heat stress monitoring equipment to ensure appropriate application of administrative controls, (2) decrease the need for use of containment tents and anti-contamination clothing, and (3) providing a wider variety of engineering and personal protective controls for heat stress prevention

  13. Energy Savings Mortgage Incentive for New Homes

    Broader source: Energy.gov [DOE]

    The amount of the incentive depends on the energy efficiency of the new home, measured on the Home Energy Rating System (HERS) Index, and must include a non-state source match. (Homes with lower...

  14. Issue #4: Are High Efficiency Hot Water Heating Systems Worth the Cost? |

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

    Department of Energy 4: Are High Efficiency Hot Water Heating Systems Worth the Cost? Issue #4: Are High Efficiency Hot Water Heating Systems Worth the Cost? What are realistic energy savings associated with the latest advanced and forthcoming water heating technologies and are they cost effective? PDF icon issue4_gasfired_waterheater.pdf PDF icon issue4_tankless_wh.pdf PDF icon issue4_waterhtg_solutions.pdf More Documents & Publications Cost Effective Water Heating Solutions Tankless

  15. CWS-fired residential warm-air heating system

    SciTech Connect (OSTI)

    Balsavich, J.C.; Becker, F.E.; Smolensky, L.A.

    1990-03-01

    The objective of the CWS-Fired Residential Warm-Air Heating System program was the development of an economically viable coal water slurry (CWS) fueled furnace that is competitive with current oil and natural gas systems. During the first phase of the program, a novel state-of-the-art Inertial Reactor with Internal Separation (IRIS) combustor was designed and tested. The second phase of the program focused on evaluating the interaction between the individual components and system design optimization. Testing was conducted on the prototype furnace. This work concentrated on optimizing the combustor configuration to yield high combustion efficiencies and prevent the possible agglomeration of coal within the combustor. Also, a new twin-fluid CWS atomizer was designed and tested. This atomizer employed a supersonic airstream to shear the CWS external to the nozzle and thereby eliminated erosion problems. Also, a new furnace system was designed, constructed, and extensively tested. This furnace, called the third-generation system, served as a basis for a manufacturing prototype and included all the necessary controls needed for automatic operation. In life testing of the third-generation furnace system, the unit operated for 200 hours and burned 1,758 pounds of CWS. This translated into an average input rate throughout the test period of 87,200 Btu/hr. During this period, combustion efficiencies ranged from 98.2 to 99.1 percent, with a noted increase in efficiency with time. This furnace was also tested in a cyclic manner for an additional period of 54 hours to evaluate the effect of thermal transients. During cyclic testing, the furnace went through repeated transient cycles, which included startup on oil, transition to CWS, and cool-down. As part of an economic evaluation the high volume cost of a CWS-fired warm air furnace was determined. 90 figs., 7 tabs.

  16. Enhanced two phase flow in heat transfer systems

    DOE Patents [OSTI]

    Tegrotenhuis, Ward E; Humble, Paul H; Lavender, Curt A; Caldwell, Dustin D

    2013-12-03

    A family of structures and designs for use in devices such as heat exchangers so as to allow for enhanced performance in heat exchangers smaller and lighter weight than other existing devices. These structures provide flow paths for liquid and vapor and are generally open. In some embodiments of the invention, these structures can also provide secondary heat transfer as well. In an evaporate heat exchanger, the inclusion of these structures and devices enhance the heat transfer coefficient of the evaporation phase change process with comparable or lower pressure drop.

  17. Performance of a drain-back solar heating and hot water system with auxiliary heat pump. Final report

    SciTech Connect (OSTI)

    Karaki, S.

    1984-03-01

    The principal objective of the project was to test and evaluate the BNL collectors in a space heating system. When the BNL collectors delaminated under stagnation conditions, they were replaced with the Chamberlain collectors which were previously used on solar house III, and tests were continued to evaluate performance of a drain-back system. Results leading to the following conclusions are discussed. (1) The Chamberlain collectors have deteriorated in performance compared to previous seasons. Where daily efficiency of 41% were attained in 1978 to 1979 and 1979 to 1980, efficiency was 37%. System efficiency of 29% compares to 30% in prior years. (2) Solar contribution to DHW heating is low, and is probably the result of the artificially imposed load profile and the low recovery rate of the double-wall heat exchanger. (3) System efficiency can be improved by reducing thermal losses from storage.

  18. Market development directory for solar industrial process heat systems

    SciTech Connect (OSTI)

    1980-02-01

    The purpose of this directory is to provide a basis for market development activities through a location listing of key trade associations, trade periodicals, and key firms for three target groups. Potential industrial users and potential IPH system designers were identified as the prime targets for market development activities. The bulk of the directory is a listing of these two groups. The third group, solar IPH equipment manufacturers, was included to provide an information source for potential industrial users and potential IPH system designers. Trade associates and their publications are listed for selected four-digit Standard Industrial Code (SIC) industries. Since industries requiring relatively lower temperature process heat probably will comprise most of the near-term market for solar IPH systems, the 80 SIC's included in this chapter have process temperature requirements less than 350/sup 0/F. Some key statistics and a location list of the largest plants (according to number of employees) in each state are included for 15 of the 80 SIC's. Architectural/engineering and consulting firms are listed which are known to have solar experience. Professional associated and periodicals to which information on solar IPH sytstems may be directed also are included. Solar equipment manufacturers and their associations are listed. The listing is based on the SERI Solar Energy Information Data Base (SEIDB).

  19. DOE Zero Energy Ready Home Case Study: Clifton View Homes, Coupeville, Washington

    SciTech Connect (OSTI)

    none,

    2013-09-01

    Ted Clifton, founder of Clifton View Homes, achieved an impressive Home Energy Rating System (HERS) score of 34 (without solar panels) on a two-story home completed in July 2011 that also earned him his first Challenge Home certification from the U.S. Department of Energy (DOE). This home also garnered a 2013 Housing Innovation Award in the "systems builder" category.

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

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

    Retrofit Integrated Space and Water Heating-Field Assessment Building America Technology Solutions for New and Existing Homes: Retrofit Integrated Space and Water Heating-Field ...