National Library of Energy BETA

Sample records for heat solar water

  1. Solar water heating panel

    SciTech Connect

    Burke, B.G.

    1984-10-02

    The present invention discloses a solar water heating panel and method of constructing such a solar panel from a pair of thin sheets bonded together around their peripheral edges and having at least one of the sheets formed with resiliently flexible areas defined by a plurality of abutting concave hexagonal areas or zones. The center of each hexagonal zone is formed as a dimple, concave with respect to the opposite sheet, whose radius of curvature is greater than the radius of an inscribed circle within said zone. The abutting zones between each hexagonal zone are formed convex relative to the opposite sheet and have a radius less than that of an inscribed circle. In a preferred form, the sheets are joined together at the center of alternate spaced-apart hexagonal areas. In this way, except for the centers bonded near the panel edges, each joined hexagonal center is surrounded by six unjoined areas to form both transverse and longitudinal flow passages through the panel.

  2. Utility solar water heating workshops

    SciTech Connect

    Barrett, L.B. )

    1992-01-01

    The objective of this project was to explore the problems and opportunities for utility participation with solar water heating as a DSM measure. Expected benefits from the workshops included an increased awareness and interest by utilities in solar water heating as well as greater understanding by federal research and policy officials of utility perspectives for purposes of planning and programming. Ultimately, the project could result in better information transfer, increased implementation of solar water heating programs, greater penetration of solar systems, and more effective research projects. The objective of the workshops was satisfied. Each workshop succeeded in exploring the problems and opportunities for utility participation with solar water heating as a DSM option. The participants provided a range of ideas and suggestions regarding useful next steps for utilities and NREL. According to evaluations, the participants believed the workshops were very valuable, and they returned to their utilities with new information, ideas, and commitment.

  3. Solar Water Heating Webinar | Department of Energy

    Energy Saver

    Weatherization Assistance Program Pilot Projects Solar Water Heating Webinar Solar Water Heating Webinar Watch a recording of National Renewable Energy Laboratory (NREL) ...

  4. 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,

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

    Energy Saver

    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. |...

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

    Energy.gov [DOE] (indexed site)

    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...

  7. Solar Water Heat | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Water Heat Jump to: navigation, search TODO: Add description List of Solar Water Heat Incentives Retrieved from "http:en.openei.orgwindex.php?titleSolarWaterHeat&oldid26719...

  8. Solar water heating: FEMP fact sheet

    SciTech Connect

    Clyne, R.

    1999-09-30

    Using the sun to heat domestic water makes sense in almost any climate. Solar water heaters typically provide 40 to 80{percent} of a building's annual water-heating needs. A solar water-heating system's performance depends primarily on the outdoor temperature, the temperature to which the water is heated, and the amount of sunlight striking the collector.

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

    Energy.gov [DOE] (indexed site)

    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...

  10. Solar Water Heating: SPECIFICATION, CHECKLIST AND GUIDE | Department...

    Energy Saver

    Solar Water Heating: SPECIFICATION, CHECKLIST AND GUIDE Solar Water Heating: SPECIFICATION, CHECKLIST AND GUIDE Solar Water Heating: SPECIFICATION, CHECKLIST AND GUIDE, from the ...

  11. 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 Contents About the Renewable Energy Ready Home Specifications Assumptions of the RERH Solar Water Heating Specification ........................................................................... 1 Builder and Specification Limitations ............................................................................................................. 2 Renewable Energy Ready Home Solar Water Heating

  12. Santa Clara Water & Sewer- Solar Water Heating Program

    Energy.gov [DOE]

    In 1975, the City of Santa Clara established the nation's first municipal solar utility. Under the Solar Water Heating Program, the Santa Clara Water & Sewer Utilities Department supplies,...

  13. Valley Electric Association- Solar Water Heating Program

    Energy.gov [DOE]

    Valley Electric Association (VEA), a nonprofit member owned cooperative, developed the domestic solar water heating program to encourage energy efficiency at the request of the membership. VEA...

  14. 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...

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

    Energy Saver

    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 ...

  16. 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

  17. 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. |...

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

    Energy Saver

    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. | ...

  19. List of Solar Water Heat Incentives | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Photovoltaics Solar Water Heat Ground Source Heat Pumps Yes City and County of Denver - Solar Panel Permitting (Colorado) SolarWind Permitting Standards Colorado Commercial...

  20. 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:...

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

    Energy Saver

    Codes and Regulations for Solar Water Heating Systems Building Codes and Regulations for Solar Water Heating Systems Photo Credit: iStockphoto Photo Credit: iStockphoto Before ...

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

    Energy Saver

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

  3. Expansion and Improvement of Solar Water Heating Technology in...

    OpenEI (Open Energy Information) [EERE & EIA]

    and Improvement of Solar Water Heating Technology in China Project Management Office Jump to: navigation, search Name: Expansion and Improvement of Solar Water Heating Technology...

  4. Report on Solar Water Heating Quantitative Survey

    SciTech Connect

    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.

  5. Lakeland Electric- Solar Water Heating Program

    Energy.gov [DOE]

    Lakeland Electric, a municipal utility in Florida, offers solar-heated domestic hot water on a "pay-for-energy" basis. The utility bills the customer $34.95 per month regardless of use. The $34.95...

  6. Sustainable Energy Resources for Consumers Webinar on Solar Water Heating

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Transcript | Department of Energy Solar Water Heating Transcript Sustainable Energy Resources for Consumers Webinar on Solar Water Heating Transcript Video recording transcript of a Webinar on Nov. 16, 2010 about residential solar water heating applications solar_water_heating_webinar.pdf (152.62 KB) More Documents & Publications Sustainable Energy Resources for Consumers (SERC) - Solar Hot Water Sustainable Energy Resources for Consumers Webinar on Residential Water Heaters Sustainable

  7. Building America Case Study: Solar Water Heating in Multifamily...

    Energy Saver

    Solar Water Heating in Multifamily Buildings Greenfield, Massachusetts PROJECT INFORMATION ... Incentives Used: * Commonwealth Solar Hot Water Program * 30% Federal tax credit * ...

  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. Solar Water Heating with Low-Cost Plastic Systems (Brochure)

    SciTech Connect

    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.

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

    Energy Saver

    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 ...

  11. Renewable energy technologies for federal facilities: Solar water heating

    SciTech Connect

    1996-05-01

    This sheet presents information on solar water heaters (passive and active), solar collectors (flat plate, evacuated tube, parabolic trough), lists opportunities for use of solar water heating, and describes what is required and the costs. Important terms are defined.

  12. Solar Domestic Water Heating: a Roof-Integrated Evaluation

    SciTech Connect

    2009-09-03

    This fact sheet describes an evaluation of the performance of a roof-integrated solar water heating system.

  13. Low Cost Solar Water Heating R&D

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Template Low Cost Solar Water Heating R&D Kate Hudon National Renewable Energy Laboratory ... This project addresses this barrier by working with an industry research partner to ...

  14. Austin Energy - Solar Water Heating Rebate | Department of Energy

    Energy.gov [DOE] (indexed site)

    Federal Government Multifamily Residential Institutional Savings Category Solar Water Heat Maximum Rebate Rebate: 2,000 Loan: 10,000 for duplex; 5,000 for single family...

  15. Maricopa Assn. of Governments - PV and Solar Domestic Water Heating...

    Energy.gov [DOE] (indexed site)

    June 18, 2003, MAG passed permit submission requirements for residential solar domestic water heating systems. This is in addition to the existing standards for residential and...

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

    Energy.gov [DOE] (indexed site)

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

  17. Duquesne Light Company - Residential Solar Water Heating Program...

    Energy.gov [DOE] (indexed site)

    rebates to its residential customers for purchasing and installing qualifying solar water heating systems. Eligible systems may receive a flat rebate of 286 per qualifying...

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

    Energy.gov [DOE] (indexed site)

    and Photovoltaic Modules. North Carolina Solar Center Heat Your Water with the Sun (PDF). U.S. Department of Energy Addthis Related Articles An example of a solar pool...

  19. South River EMC- Solar Water Heating Rebate Program

    Energy.gov [DOE]

    South River Electric Membership Corporation (EMC) is providing rebates to encourage their customers to install solar water heating systems. To be eligible for the rebate solar collectors must have...

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

    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) in their newly-constructed homes. Rebates of...

  1. EWEB- Residential Solar Water Heating Loan Program

    Energy.gov [DOE]

    Eugene Water & Electric Board (EWEB) offers residential customers a loan and cash discount program called, "The Bright Way To Heat Water." The program is designed to promote the installation of...

  2. Piedmont EMC- Solar Water Heating Rebate Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    Piedmont Electric Membership Corporation is offering a $500 rebate to its residential members who install solar water heaters on their homes. The utility recommends but does not require the system...

  3. Low Cost Solar Water Heating R&D | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Low Cost Solar Water Heating R&D Low Cost Solar Water Heating R&D Emerging Technologies Project for the 2013 Building Technologies Office's Program Peer Review ...

  4. Water Consumption from Freeze Protection Valves for Solar Water Heating Systems

    SciTech Connect

    Burch, J.; Salasovich, J.

    2005-12-01

    Conference paper regarding research in the use of freeze protection valves for solar domestic water heating systems in cold climates.

  5. Minnesota Power- Solar-Thermal Water Heating Rebate Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    Minnesota Power offers a 25% rebate for qualifying solar thermal water heating systems. The maximum award for single-family customers is $2,000 per customer; $4,000 for 2-3 family unit buildings;...

  6. GreyStone Power- Solar Water Heating Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    GreyStone Power, an electricity cooperative serving 103,000 customers in Georgia, introduced a solar water heating rebate in March 2009. This $500 rebate is available to customers regardless of...

  7. City of Palo Alto Utilities- Solar Water Heating Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    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...

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

    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...

  9. NREL and Industry Advance Low-Cost Solar Water Heating R&D (Fact...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    NREL and Rhotech develop cost-effective solar water heating prototype to rival natural gas water heaters. Water heating energy use represents the second largest energy demand for ...

  10. Low-Cost Solar Water Heating Research and Development Roadmap

    SciTech Connect

    Hudon, K.; Merrigan, T.; Burch, J.; Maguire, J.

    2012-08-01

    The market environment for solar water heating technology has changed substantially with the successful introduction of heat pump water heaters (HPWHs). The addition of this energy-efficient technology to the market increases direct competition with solar water heaters (SWHs) for available energy savings. It is therefore essential to understand which segment of the market is best suited for HPWHs and focus the development of innovative, low-cost SWHs in the market segment where the largest opportunities exist. To evaluate cost and performance tradeoffs between high performance hot water heating systems, annual energy simulations were run using the program, TRNSYS, and analysis was performed to compare the energy savings associated with HPWH and SWH technologies to conventional methods of water heating.

  11. NREL and Industry Advance Low-Cost Solar Water Heating R&D (Fact Sheet)

    SciTech Connect

    Not Available

    2014-08-01

    NREL and Rhotech develop cost-effective solar water heating prototype to rival natural gas water heater market.

  12. PV vs. Solar Water Heating- Simple Solar Payback

    Energy.gov [DOE]

    Solar energy systems hang their hats on payback. Financial payback is as tangible as money in your bank account, while other types of payback—like environmental externalities—are not usually calculated in dollars. There’s no doubt that photovoltaic (PV) and solar hot water (SHW) systems will pay you back. Maybe not as quickly as you’d like, but all systems will significantly offset their cost over their lifetimes. Here we’ll try to answer: Which system will give the quickest return on investment (ROI)?

  13. Federal technology alert. Parabolic-trough solar water heating

    SciTech Connect

    1998-04-01

    Parabolic-trough solar water heating is a well-proven renewable energy technology with considerable potential for application at Federal facilities. For the US, parabolic-trough water-heating systems are most cost effective in the Southwest where direct solar radiation is high. Jails, hospitals, barracks, and other facilities that consistently use large volumes of hot water are particularly good candidates, as are facilities with central plants for district heating. As with any renewable energy or energy efficiency technology requiring significant initial capital investment, the primary condition that will make a parabolic-trough system economically viable is if it is replacing expensive conventional water heating. In combination with absorption cooling systems, parabolic-trough collectors can also be used for air-conditioning. Industrial Solar Technology (IST) of Golden, Colorado, is the sole current manufacturer of parabolic-trough solar water heating systems. IST has an Indefinite Delivery/Indefinite Quantity (IDIQ) contract with the Federal Energy Management Program (FEMP) of the US Department of Energy (DOE) to finance and install parabolic-trough solar water heating on an Energy Savings Performance Contract (ESPC) basis for any Federal facility that requests it and for which it proves viable. For an ESPC project, the facility does not pay for design, capital equipment, or installation. Instead, it pays only for guaranteed energy savings. Preparing and implementing delivery or task orders against the IDIQ is much simpler than the standard procurement process. This Federal Technology Alert (FTA) of the New Technology Demonstration Program is one of a series of guides to renewable energy and new energy-efficient technologies.

  14. Simple solar water heating systems: The SWAP program in Florida

    SciTech Connect

    Harrison, J.

    1997-11-01

    This article describes the development of a solar water heating system appropriate for low-income Florida residents and the appliances developed in conjunction with it that may appeal to a wider market. Among the topics discussed are size and design of the system including passive preheaters and affordable active systems. Electric water heaters with 40 and 50 gallon capacity were found to be the most cost effective. The feed-back from customers is also discussed. 3 figs.

  15. Mexico-GTZ Support for the Programme to Promote Solar Water Heating...

    OpenEI (Open Energy Information) [EERE & EIA]

    Support for the Programme to Promote Solar Water Heating Jump to: navigation, search Logo: Mexico-GTZ Support for the Programme to Promote Solar Water Heating Name Mexico-GTZ...

  16. Solar Water Heating with Low-Cost Plastic Systems

    SciTech Connect

    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.

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

    Energy.gov [DOE] (indexed site)

    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...

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

    SciTech Connect

    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.

  19. Solar water heating technical support. Technical report for November 1997--April 1998 and final report

    SciTech Connect

    Huggins, J.

    1998-10-01

    This progress report covers the time period November 1, 1997 through April 30, 1998, and also summarizes the project as the final report. The topics of the report include certification of solar collectors for water heating systems, modeling and testing of solar collectors and gas water heater backup systems, ratings of collectors for specific climates, and solar pool heating systems.

  20. Lumbee River EMC- Solar Water Heating Rebate Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    Lumbee River EMC is offering $850 rebates to residential customers who install solar water heaters on their homes. To qualify, the systems must be certified OG-300 by the Solar Ratings and...

  1. Lumbee River EMC- Solar Water Heating Loan Program

    Energy.gov [DOE]

    Lumbee River EMC is offering 6% loans to residential customers for the installation of solar water heaters on their homes.  To qualify, the systems must be certified OG-300 by the Solar Ratings and...

  2. Break-Even Cost for Residential Solar Water Heating in the United...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Break-even Cost for Residential Solar Water Heating in the United States: Key Drivers and Sensitivities Hannah Cassard, Paul Denholm, and Sean Ong Technical Report NREL...

  3. Ocala Utility Services- Solar Hot Water Heating Rebate Program

    Energy.gov [DOE]

    The Solar Water Heater Rebate Program is offered to residential retail electric customers by the City of Ocala Utility Services. Interested customers must complete an application and receive...

  4. Using Solar Hot Water to Address Piping Heat Losses in Multifamily Buildings

    SciTech Connect

    Springer, David; Seitzler, Matt; Backman, Christine; Weitzel, Elizabeth

    2015-10-01

    Solar thermal water heating is most cost effective when applied to multifamily buildings and some states offer incentives or other inducements to install them. However, typical solar water heating designs do not allow the solar generated heat to be applied to recirculation losses, only to reduce the amount of gas or electric energy needed for hot water that is delivered to the fixtures. For good reasons, hot water that is recirculated through the building is returned to the water heater, not to the solar storage tank. The project described in this report investigated the effectiveness of using automatic valves to divert water that is normally returned through the recirculation piping to the gas or electric water heater instead to the solar storage tank. The valves can be controlled so that the flow is only diverted when the returning water is cooler than the water in the solar storage tank.

  5. City of Tallahassee Utilities- Solar Water Heating Rebate

    Office of Energy Efficiency and Renewable Energy (EERE)

    The homeowner must allow the City of Tallahassee to conduct an energy audit on the home in order to make a preliminary assessment of sun exposure and to provide program guidance. All solar water...

  6. NREL: Learning - Solar Process Heat Basics

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Water Heating Solar water-heating systems are designed to provide large quantities of hot water for nonresidential ... Solar absorption systems use thermal energy to evaporate a ...

  7. Technology Solutions for New Homes Case Study: Indirect Solar Water Heating

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Systems in Single-Family Homes | Department of Energy 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, 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 feature R-40 walls, triple-pane windows, R-50 attic insulation, and airtight

  8. Hot water tank for use with a combination of solar energy and heat-pump desuperheating

    DOEpatents

    Andrews, J.W.

    1980-06-25

    A water heater or system is described which includes a hot water tank having disposed therein a movable baffle to function as a barrier between the incoming volume of cold water entering the tank and the volume of heated water entering the tank which is heated by the circulation of the cold water through a solar collector and/or a desuperheater of a heat pump so as to optimize the manner in which heat is imparted to the water in accordance to the demand on the water heater or system. A supplemental heater is also provided and it is connected so as to supplement the heating of the water in the event that the solar collector and/or desuperheater cannot impart all of the desired heat input into the water.

  9. Hot water tank for use with a combination of solar energy and heat-pump desuperheating

    DOEpatents

    Andrews, John W.

    1983-06-28

    A water heater or system which includes a hot water tank having disposed therein a movable baffle to function as a barrier between the incoming volume of cold water entering the tank and the volume of heated water entering the tank which is heated by the circulation of the cold water through a solar collector and/or a desuperheater of a heat pump so as to optimize the manner in which heat is imparted to the water in accordance to the demand on the water heater or system. A supplemental heater is also provided and it is connected so as to supplement the heating of the water in the event that the solar collector and/or desuperheater cannot impart all of the desired heat input into the water.

  10. Solar heating and hot water system installed at St. Louis, Missouri. Final report

    SciTech Connect

    Not Available

    1980-04-01

    Information is provided on the solar heating and hot water system installed at the William Tao and Associates, Inc., office building in St. Louis, Missouri. The information consists of description, photos, maintenance and construction problems, final drawing, system requirements and manufacturer's component data. The solar system was designed to provide 50% of the hot water requirements and 45% of the space heating needs for a 900 square foot office space and drafting room. The solar facility has 252 square foot of glass tube concentrator collectors and a 1000 gallon steel storage tank buried below a concrete slab floor. Freeze protection is provided by a propylene glycol/water mixture in the collector loop. The collectors are roof mounted on a variable tilt array which is adjusted seasonally and is connected to the solar thermal storage tank by a tube-in-shell heat exchanger. Incoming city water is preheated through the solar energy thermal storage tank.

  11. Duke Energy Florida- SunSense Solar Water Heating with EnergyWise

    Energy.gov [DOE]

    Duke Energy Florida (DEF) launched the Solar Water Heating with EnergyWise Program in February 2007 to encourage its residential customers to participate in its load control program and install a...

  12. Efficient Solutions for Existing Homes Case Study: Solar Water Heating in

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Multifamily Buildings | Department of Energy Existing Homes Case Study: Solar Water Heating in Multifamily Buildings Efficient Solutions for Existing Homes Case Study: Solar Water Heating in Multifamily Buildings 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

  13. Experimental investigation on the photovoltaic-thermal solar heat pump air-conditioning system on water-heating mode

    SciTech Connect

    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)

  14. SRP - Solar Water Heating Program | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    on SRCC rating) Summary NOTE: SRP no longer provides incentives for solar electric photovoltaic systems. SRP's Solar Electric Program provides incentives to its residential...

  15. Active Solar Heating | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    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

  16. Experience with thermal storage in tanks of stratified water for solar heating and load management

    SciTech Connect

    Wildin, M.W.; Witkofsky, M.P.; Noble, J.M.; Hopper, R.E.; Stromberg, P.G.

    1982-01-01

    Results have been obtained for performance of stratified tanks of water used to store heating and cooling capacity in a 5574 m/sup 2/ university building. The major sources of energy used to charge the heated tanks were solar energy, obtained via collectors on the roof of the building, and excess heat recovered from the interior of the building via thermal storage and electric-driven heat pump/chillers. Through stratification of the water in the storage tanks and an appropriate system operating strategy, 40 percent of the building's total heating needs were supplied by solar energy during the first four months of 1981. Month-long thermal efficiencies of the storage array ranging from 70 percent during the heating season to nearly 90 percent during the cooling season, were measured. Work is underway to improve the performance of thermal storage.

  17. Heating Water with Solar Energy Costs Less at the Phoenix Federal Correctional Institution

    SciTech Connect

    2004-09-01

    A large solar thermal system installed at the Phoenix Federal Correctional Institution (FCI) in 1998 heats water for the prison and costs less than buying electricity to heat that water. This renewable energy system provides 70% of the facility's annual hot water needs. The Federal Bureau of Prisons did not incur the up-front cost of this system because it was financed through an Energy Savings Performance Contract (ESPC). The ESPC payments are 10% less than the energy savings so that the prison saves an average of $6,700 per year, providing an immediate payback. The solar hot water system produces up to 50,000 gallons of hot water daily, enough to meet the needs of 1,250 inmates and staff who use the kitchen, shower, and laundry facilities. This publication details specifications of the parabolic trough solar system and highlights 5 years of measured performance data.

  18. Solar Thermal Systems: Solar Heating R&D

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Solar Energy Technologies Solar Thermal Systems: Solar Heating R&D National Renewable Energy Laboratory Sandia National Laboratories U.S. Department of Energy Solar Energy Technologies Presentation Outline * Description of solar thermal R&D activities in: - Low-cost passive solar hot water systems * Polymer integral collector-storage (PICS) systems - Low-cost active solar systems * Cold-climate solar water heating systems * Combined heating and cooling (CHC) systems Solar Thermal Systems

  19. Low-Cost Solar Water Heating Research and Development Roadmap

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Gas Heat Pump For Building Space Heating Low-Cost Gas Heat Pump For Building Space Heating Credit: Stone Mountain Technologies Credit: Stone Mountain Technologies Lead Performer: Stone Mountain Technologies - Erwin, TN Partners: -- A.O. Smith - Milwaukee, WI -- Gas Technology Institute - Des Plaines, IL DOE Funding: $903,000 Cost Share: $232,294 Project Term: March 1, 2013 - August 31, 2015 Funding Opportunity: Energy Savings Through Improved Mechanical Systems and Building Envelope Technologies

  20. Texas Gas Service- Residential Solar Water Heating Rebate Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    Only active systems with panels (or collectors) that are certified OG-100 by the Solar Rating Certification Corporation (SRCC) qualify for this rebate. Work must be completed by a licensed contra...

  1. Heating Water with Solar Energy Costs Less at the Phoenix Federal Correctional Institution

    SciTech Connect

    Not Available

    2004-09-01

    A large solar thermal system installed at the Phoenix Federal Correctional Institution (FCI) in 1998 heats water for the prison and costs less than buying electricity to heat that water. This renewable energy system provides 70% of the facility's annual hot water needs. The Federal Bureau of Prisons did not incur the up-front cost of this system because it was financed through an Energy Savings Performance Contract (ESPC). The ESPC payments are 10% less than the energy savings so that the prison saves an average of$6,700 per year, providing an immediate payback. The solar hot water system produces up to 50,000 gallons of hot water daily, enough to meet the needs of 1,250 inmates and staff who use the kitchen, shower, and laundry facilities.

  2. California Solar Initiative- Low-Income Solar Water Heating Rebate Program

    Energy.gov [DOE]

    The program is only available to customers who currently heat their water with natural gas in the service territories of Pacific Gas and Electric Company (PG&E), San Diego Gas & Electric ...

  3. Knox County Detention Facility Goes Solar for Heating Water

    Energy.gov [DOE]

    Hot water demand soars at the six-building Knox County Detention Facility in Tennessee. It's open 24/7 with 1,036 inmate beds and 4,500 meals served daily—and don't forget the laundry.

  4. Solar heating, cooling and domestic hot water system installed at Columbia Gas System Service Corp. , Columbus, Ohio. Final report

    SciTech Connect

    1980-11-01

    The Solar Energy System located at the Columbia Gas Corporation, Columbus, Ohio, has 2978 ft/sup 2/ of Honeywell single axis tracking, concentrating collectors and provides solar energy for space heating, space cooling and domestic hot water. A 1,200,000 Btu/h Bryan water-tube gas boiler provides hot water for space heating. Space cooling is provided by a 100 ton Arkla hot water fired absorption chiller. Domestic hot water heating is provided by a 50 gallon natural gas domestic storage water heater. Extracts are included from the site files, specification references, drawings, installation, operation and maintenance instructions.

  5. Using Solar Hot Water to Address Piping Heat Losses in Multifamily...

    Office of Scientific and Technical Information (OSTI)

    Subject: 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION residential; Residential Buildings; ARBI; Building America; TRNSYS; multifamily; domestic hot water; solar water ...

  6. Solar heating panel

    SciTech Connect

    Ellsworth, R.L.

    1983-01-18

    A solar heating panel for collecting solar heat energy and method for making same having a heat insulative substrate with a multiplicity of grooves and structural supporting ribs formed therein covered by a thin, flexible heat conductive film to form fluid conducting channels which in turn are connected to manifolds from which fluid is directed into the channels and heated fluid is removed therefrom.

  7. Solar Water Heaters | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Heat & Cool » Water Heating » Solar Water Heaters Solar Water Heaters 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 Energy Laboratory Solar water heaters -- also called solar domestic hot water systems -- can be a cost-effective way to generate hot water for your home. They can be used in

  8. Using Solar Hot Water to Address Piping Heat Losses in Multifamily...

    Office of Scientific and Technical Information (OSTI)

    Subject: residential; Residential Buildings; ARBI; Building America; TRNSYS; multifamily; domestic hot water; solar water heater; recirculation Word Cloud More Like This Full Text ...

  9. Solar space- and water-heating system at Stanford University. Final report

    SciTech Connect

    Not Available

    1980-05-01

    Application of an active hydronic domestic hot water and space heating solar system for the Central Food Services Building is discussed. The closed-loop drain-back system is described as offering dependability of gravity drain-back freeze protection, low maintenance, minimal costs, and simplicity. The system features an 840 square-foot collector and storage capacity of 1550 gallons. The acceptance testing and the predicted system performance data are briefly described. Solar performance calculations were performed using a computer design program (FCHART). Bidding, costs, and economics of the system are reviewed. Problems are discussed and solutions and recommendations given. An operation and maintenance manual is given in Appendix A, and Appendix B presents As-built Drawings. (MCW)

  10. Guidelines for selecting a solar heating, cooling or hot water design

    SciTech Connect

    Kelly, C.J. Jr.

    1981-12-01

    Guidelines are presented for the professional who may have to choose between competing solar heating and cooling designs for buildings. The experience of the National Solar Data Network in monitoring over 100 solar installations are drawn upon. Three basic principles and a design selection checklist are developed which will aid in choosing the most cost effective design.

  11. Passive solar space heating

    SciTech Connect

    Balcomb, J.D.

    1980-01-01

    An overview of passive solar space heating is presented indicating trends in design, new developments, performance measures, analytical design aids, and monitored building results.

  12. California Solar Initiative- Low-Income Solar Water Heating Rebate Program

    Energy.gov [DOE]

    The California Public Utilities Commission (CPUC) voted in October 2011 to create the California Solar Initiative (CSI) Thermal Low-Income program for single and multifamily residential properties....

  13. Solar Water Heater Basics | Department of Energy

    Energy Saver

    Water Heating Solar Water Heater Basics Solar Water Heater Basics August 19, 2013 - 3:01pm Addthis Illustration of an active, closed loop solar water heater. A large, flat panel ...

  14. Solar water heaters | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Solar water heaters Jump to: navigation, search (The following text is derived from the United States Department of Energy's description of Solar Water Heating technology.)1...

  15. Solar heating panel arrangement

    SciTech Connect

    Chang, M.K.

    1983-07-12

    A solar heating panel arrangement and method are disclosed wherein a plurality of spherical lenses transmit and focus solar radiation onto the upper surface of a fluid passage for various relative positions of the sun. The upper surface of the passage is in heat transfer proximity to the fluid therein, causing solar radiation focused thereon to be transferred to the fluid in the form of heat. Solar radiation not directly incident on the lenses may be reflected onto them to increase the amount of solar energy available for transfer to the fluid. A supplementary insulating flow of fluid may also be provided above the passage to absorb heat passing upwardly therefrom and retain the heat within the system.

  16. 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 &

  17. Active solar heating systems installation manual

    SciTech Connect

    Not Available

    1991-01-01

    This book provides an industry consensus of the best available installation procedures for large commercial-scale solar service water and space heating systems.

  18. Active Solar Heating Basics | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Active Solar Heating Basics Active Solar Heating Basics August 16, 2013 - 3:23pm Addthis There are two basic types of active solar heating systems based on the type of fluid-either liquid or air-that is heated in the solar energy collectors. The collector is the device in which a fluid is heated by the sun. Liquid-based systems heat water or an antifreeze solution in a "hydronic" collector, whereas air-based systems heat air in an "air collector." Both of these systems

  19. Solar heating and hot water system installed at the Senior Citizen Center, Huntsville, Alabama. [Includes engineering drawings

    SciTech Connect

    Not Available

    1980-02-01

    Information is provided on the solar energy system installed at the Huntsville Senior Citizen Center. The solar space heating and hot water facility and the project involved in its construction are described in considerable detail and detailed drawings of the complete system and discussions of the planning, the hardware, recommendations, and other pertinent information are included. The facility was designed to provide 85 percent of the hot water and 85 percent of the space heating requirements. Two important factors concerning this project for commercial demonstration are the successful use of silicon oil as a heat transfer fluid and the architecturally aesthetic impact of a large solar energy system as a visual centerpoint. There is no overheat or freeze protection due to the characteristics of the silicon oil and the design of the system. Construction proceeded on schedule with no cost overruns. It is designed to be relatively free of scheduled maintenance, and has experienced practically no problems.

  20. Solar heat receiver

    DOEpatents

    Hunt, Arlon J.; Hansen, Leif J.; Evans, David B.

    1985-01-01

    A receiver for converting solar energy to heat a gas to temperatures from 700.degree.-900.degree. C. The receiver is formed to minimize impingement of radiation on the walls and to provide maximum heating at and near the entry of the gas exit. Also, the receiver is formed to provide controlled movement of the gas to be heated to minimize wall temperatures. The receiver is designed for use with gas containing fine heat absorbing particles, such as carbon particles.

  1. Solar heat receiver

    DOEpatents

    Hunt, A.J.; Hansen, L.J.; Evans, D.B.

    1982-09-29

    A receiver is described for converting solar energy to heat a gas to temperatures from 700 to 900/sup 0/C. The receiver is formed to minimize impingement of radiation on the walls and to provide maximum heating at and near the entry of the gas exit. Also, the receiver is formed to provide controlled movement of the gas to be heated to minimize wall temperatures. The receiver is designed for use with gas containing fine heat absorbing particles, such as carbon particles.

  2. Solar heat collector module

    SciTech Connect

    Lightfoot, D.J.

    1980-09-23

    A solar heat system is comprised of a panel or bank of heat collector modules each of which has a fluid-carrying tube of an elongated triangular shape in transverse cross section formed with longitudinally extended inwardly projected heat radiating fins. A tube is mounted within a concavo-convex reflector of a hyperbolic form such that the side walls of the tube are subjected to reflected rays of solar radiation over an effective range of solar exposure of about one hundred and fifty (150*) degrees. The reflected rays are concentrated in a longitudinally extended focal zone on each side wall of the tube and these zones of concentrated solar radiation move transversely of a side wall in response to the angle of the solar rays falling upon the reflector.

  3. Passive solar heating analysis

    SciTech Connect

    Balcomb, J.D.; Jones, R.W.; Mc Farland, R.D.; Wray, W.O.

    1984-01-01

    This book discusses about the design of solar heating systems. The terms and symbols are clearly defined. Step-by-step procedures are indicated. Worked examples are given with tables, graphs, appendixes.

  4. Technical Potential of Solar Water Heating to Reduce Fossil Fuel Use and Greenhouse Gas Emissions in the United States

    SciTech Connect

    Denholm, P.

    2007-03-01

    Use of solar water heating (SWH) in the United States grew significantly in the late 1970s and early 1980s, as a result of increasing energy prices and generous tax credits. Since 1985, however, expiration of federal tax credits and decreased energy prices have virtually eliminated the U.S. market for SWH. More recently, increases in energy prices, concerns regarding emissions of greenhouse gases, and improvements in SWH systems have created new interest in the potential of this technology. SWH, which uses the sun to heat water directly or via a heat-transfer fluid in a collector, may be particularly important in its ability to reduce natural gas use. Dependence on natural gas as an energy resource in the United States has significantly increased in the past decade, along with increased prices, price volatility, and concerns about sustainability and security of supply. One of the readily deployable technologies available to decrease use of natural gas is solar water heating. This report provides an overview of the technical potential of solar water heating to reduce fossil fuel consumption and associated greenhouse gas emissions in U.S. residential and commercial buildings.

  5. Water Heating | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Water Heating Water Heating Infographic: Water Heaters 101 Infographic: Water Heaters 101 Everything you need to know about saving money on water heating costs. Read more Selecting a New Water Heater Selecting a New Water Heater Tankless? Storage? Solar? Save money on your water heating bill by choosing the right type of energy-efficient water heater for your needs. Read more Sizing a New Water Heater Sizing a New Water Heater When buying a new water heater, bigger is not always better. Learn

  6. Sustainable Energy Resources for Consumers Webinar on Solar Water...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Solar Water Heating Transcript Sustainable Energy Resources for Consumers Webinar on Solar Water Heating Transcript Video recording transcript of a Webinar on Nov. 16, 2010 about ...

  7. Performance of a drain-back solar heating and hot water system with auxiliary heat pump. Final report

    SciTech Connect

    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.

  8. Assessment of Unglazed Solar Domestic Water Heaters

    SciTech Connect

    Burch, J.; Salasovich, J.; Hillman, T.

    2005-12-01

    Conference paper investigating cost-performance tradeoffs in replacing glazed collectors with unglazed collectors in solar domestic water heating systems.

  9. Solar industrial process heat

    SciTech Connect

    Lumsdaine, E.

    1981-04-01

    The aim of the assessment reported is to candidly examine the contribution that solar industrial process heat (SIPH) is realistically able to make in the near and long-term energy futures of the United States. The performance history of government and privately funded SIPH demonstration programs, 15 of which are briefly summarized, and the present status of SIPH technology are discussed. The technical and performance characteristics of solar industrial process heat plants and equipment are reviewed, as well as evaluating how the operating experience of over a dozen SIPH demonstration projects is influencing institutional acceptance and economoc projections. Implications for domestic energy policy and international implications are briefly discussed. (LEW)

  10. Passive Solar Building Design and Solar Thermal Space Heating...

    Energy Saver

    Passive Solar Building Design and Solar Thermal Space Heating Webinar Passive Solar Building Design and Solar Thermal Space Heating Webinar Watch a recording of National Renewable ...

  11. Solar heating, cooling, and domestic hot water system installed at Kaw Valley State Bank and Trust Company, Topeka, Kansas. Final report

    SciTech Connect

    1980-11-01

    The building has approximately 5600 square feet of conditioned space. Solar energy is used for space heating, space cooling, and preheating domestic hot water (DHW). The solar energy system has an array of evacuated tube-type collectors with an area of 1068 square feet. A 50/50 solution of ethylene glycol and water is the transfer medium that delivers solar energy to a tube-in-shell heat exchanger that in turn delivers solar-heated water to a 1100 gallon pressurized hot water storage tank. When solar energy is insufficient to satisfy the space heating and/or cooling demand, a natural gas-fired boiler provides auxiliary energy to the fan coil loops and/or the absorption chillers. Extracts from the site files, specification references, drawings, and installation, operation and maintenance instructions are included.

  12. Portable solar water heater

    SciTech Connect

    Borodulin, G.; Baron, R.; Shkolnik, A.

    1985-11-12

    A combined table and portable solar water heater comprises a suitcase-like rigid casing molded from a rigid plastic material which contains a pair of solar collector panels and connected in series. The panels can be exposed to solar radiation when the casing is opened. Each collector panel or is formed by a copper plate with the solar radiation absorbing surface and copper pipe coil or in heat-transferring relationship with said copper plate. The casing is provided with compartments for accessories, such as adjustable legs for supporting the casing, adjusting its angle to incident sunlight, and for converting the casing into a table; containers for feeding cold water to the solar collector and for receiving hot water from the collector; and a tripod stand for supporting the feeding container at the level above the collector and for arranging a shower set. Temperature-insulating layers of the collectors are formed by separate pieces of rigid material which can be removed from the casing and assembled into a box-shaped container which can be utilized for maintaining water heated by means of the solar water heater at an elevated temperature.

  13. The Technical Potential of Solar Water Heating to Reduce Fossil Fuel Use and Greenhouse Gas Emissions in the United States

    SciTech Connect

    2009-01-18

    Use of solar water heating (SWH) in the United States grew significantly in the late 1970s and early 1980s, as a result of increasing energy prices and generous tax credits. Since 1985, however, expiration of federal tax credits and decreased energy prices have virtually eliminated the U.S. market for SWH. More recently, increases in energy prices, concerns regarding emissions of greenhouse gases, and improvements in SWH systems have created new interest in the potential of this technology. SWH,

  14. 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. This utility room includes a heat pump water heater. | Photo courtesy of Thomas Kelsey/U.S. Department of Energy Solar Decathlon This utility room includes a heat pump water heater. | Photo courtesy of Thomas Kelsey/U.S. Department of Energy Solar Decathlon A diagram of a heat pump water heater. This utility room includes a heat pump water heater. | Photo courtesy of

  15. Solar heating system

    DOEpatents

    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.

  16. Improved solar heating systems

    DOEpatents

    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.

  17. Molded polymer solar water heater

    DOEpatents

    Bourne, Richard C.; Lee, Brian E.

    2004-11-09

    A solar water heater has a rotationally-molded water box and a glazing subassembly disposed over the water box that enhances solar gain and provides an insulating air space between the outside environment and the water box. When used with a pressurized water system, an internal heat exchanger is integrally molded within the water box. Mounting and connection hardware is included to provide a rapid and secure method of installation.

  18. Solar Hot Water Hourly Simulation

    Energy Science and Technology Software Center

    2009-12-31

    The Software consists of a spreadsheet written in Microsoft Excel which provides an hourly simulation of a solar hot water heating system (including solar geometry, solar collector efficiency as a function of temperature, energy balance on storage tank and lifecycle cost analysis).

  19. Solar heated rotary kiln

    DOEpatents

    Shell, Pamela K. (Tracy, CA)

    1984-01-01

    A solar heated rotary kiln utilized for decomposition of materials, such as zinc sulfate. The rotary kiln has an open end and is enclosed in a sealed container having a window positioned for directing solar energy into the open end of the kiln. The material to be decomposed is directed through the container into the kiln by a feed tube. The container is also provided with an outlet for exhaust gases and an outlet for spent solids, and rests on a tiltable base. The window may be cooled and kept clear of debris by coolant gases.

  20. Solar space and water heating system at Stanford University Central Food Services Building. Final report

    SciTech Connect

    Not Available

    1980-05-01

    This active hydronic domestic hot water and space heating system was 840 ft/sup 2/ of single-glazed, liquid, flat plate collectors and 1550 gal heat storage tanks. The following are discussed: energy conservation, design philosophy, operation, acceptance testing, performance data, collector selection, bidding, costs, economics, problems, and recommendations. An operation and maintenance manual and as-built drawings are included in appendices. (MHR)

  1. Glass heat pipe evacuated tube solar collector

    DOEpatents

    McConnell, Robert D.; Vansant, James H.

    1984-01-01

    A glass heat pipe is adapted for use as a solar energy absorber in an evacuated tube solar collector and for transferring the absorbed solar energy to a working fluid medium or heat sink for storage or practical use. A capillary wick is formed of granular glass particles fused together by heat on the inside surface of the heat pipe with a water glass binder solution to enhance capillary drive distribution of the thermal transfer fluid in the heat pipe throughout the entire inside surface of the evaporator portion of the heat pipe. Selective coatings are used on the heat pipe surface to maximize solar absorption and minimize energy radiation, and the glass wick can alternatively be fabricated with granular particles of black glass or obsidian.

  2. Solar-heated hot water instrumentation project for EPRI Headquarters complex, Palo Alto, California. Final report

    SciTech Connect

    Whitehouse, H.T.; Ortiz, P.

    1981-01-01

    A data acquisition and analysis effort charted the performance of a solar-assisted, hot water preheat system supplying a portion of the service water needs at the EPRI Headquarters complex in Palo Alto, California. The project commenced in June of 1978, with active data acquisition transpiring over a 12-month period from December 1, 1978, to November 30, 1979. Detailed load and performance data for the system are presented, the merits of the data acquisition system employed are discussed, and recommendations for future monitoring efforts are provided.

  3. Break-Even Cost for Residential Solar Water Heating in the United States: Key Drivers and Sensitivities

    SciTech Connect

    Cassard, H.; Denholm, P.; Ong, S.

    2011-02-01

    This paper examines the break-even cost for residential rooftop solar water heating (SWH) technology, defined as the point where the cost of the energy saved with a SWH system equals the cost of a conventional heating fuel purchased from the grid (either electricity or natural gas). We examine the break-even cost for the largest 1,000 electric and natural gas utilities serving residential customers in the United States as of 2008. Currently, the break-even cost of SWH in the United States varies by more than a factor of five for both electricity and natural gas, despite a much smaller variation in the amount of energy saved by the systems (a factor of approximately one and a half). The break-even price for natural gas is lower than that for electricity due to a lower fuel cost. We also consider the relationship between SWH price and solar fraction and examine the key drivers behind break-even costs. Overall, the key drivers of the break-even cost of SWH are a combination of fuel price, local incentives, and technical factors including the solar resource location, system size, and hot water draw.

  4. In-situ parameter estimation for solar domestic hot water heating systems components. Final report, June 1995--May 1996

    SciTech Connect

    Smith, T.R.

    1997-03-01

    Three different solar domestic hot water systems are being tested at the Colorado State University Solar Energy Applications Laboratory; an unpressurized drain-back system with a load side heat exchanger, an integral collector storage system, and an ultra low flow natural convection heat exchanger system. The systems are fully instrumented to yield data appropriate for in-depth analyses of performance. The level of detail allows the observation of the performance of the total system and the performance of the individual components. This report evaluates the systems based on in-situ experimental data and compares the performances with simulated performances. The verification of the simulations aids in the rating procedure. The whole system performance measurements are also used to analyze the performance of individual components of a solar hot water system and to develop improved component models. The data are analyzed extensively and the parameters needed to characterize the systems fully are developed. Also resulting from this indepth analysis are suggested design improvements wither to the systems or the system components.

  5. SMUD- Solar Water Heater Rebate Program

    Energy.gov [DOE]

    The Sacramento Municipal Utility District's (SMUD) Solar Domestic Hot Water Program provides rebates and/or loan financing to customers who install solar water heating systems. The amount of the...

  6. Solar heating panel

    SciTech Connect

    Keefe, R.A.

    1983-08-09

    A method of maintaining the temperature of a solar heating panel with glazing below about 220/sup 0/ utilizes convention cooling, where it is essential to the success of the method that the glazing be at least two inches above the upper surface of the collector. A panel of unitary construction of essentially the same plastic material which is an embodiment of the method can withstand the normal operating conditions to which such panels are subjected without thermal degradation of the plastic nor danger of rupture attending loss of physical integrity at excessive temperatures.

  7. Total Space Heating Water Heating Cook-

    Annual Energy Outlook

    Commercial Buildings Energy Consumption Survey: Energy End-Use Consumption Tables Total Space Heating Water Heating Cook- ing Other Total Space Heating Water Heating Cook- ing...

  8. Total Space Heating Water Heating Cook-

    Gasoline and Diesel Fuel Update

    Released: September, 2008 Total Space Heating Water Heating Cook- ing Other Total Space Heating Water Heating Cook- ing Other All Buildings* ... 1,870 1,276...

  9. Total Space Heating Water Heating Cook-

    Gasoline and Diesel Fuel Update

    Energy Consumption Survey: Energy End-Use Consumption Tables Total Space Heating Water Heating Cook- ing Other Total Space Heating Water Heating Cook- ing Other All...

  10. Total Space Heating Water Heating Cook-

    Gasoline and Diesel Fuel Update

    Released: September, 2008 Total Space Heating Water Heating Cook- ing Other Total Space Heating Water Heating Cook- ing Other All Buildings* ... 1,602 1,397...

  11. Total Space Heating Water Heating Cook-

    Gasoline and Diesel Fuel Update

    Released: September, 2008 Total Space Heating Water Heating Cook- ing Other Total Space Heating Water Heating Cook- ing Other All Buildings ... 2,037...

  12. Static solar heat collectors

    SciTech Connect

    Brill-Edwards, K.O.

    1981-08-18

    A load-bearing building panel capable of forming an external wall cladding or roof component has a solar heat collecting capacity in the form of channels for heat exchange fluid incorporated in the fabric of the panel. The panel is made of a structural plastics material, such as GRP. Laminate, successive layers being moulded to simulate tiles. On the back or underside, longitudinal reinforcing beams are built in during laying up of the panel. Between the beams cores or formers defining a matrix or channels are encapsulated in layers of the GRP. Wax cores are melted or dissolved out after curing of the panel; metal formers remain embedded in the fabric of the panel. The matrix is connected by flow and return pipes to a heat exchange system within the building. Panels intended for roofing have ridge flanges and wall plates moulded into the substrate at the appropriate pitch angle, and a split capping tube embraces the ridge flanges. A pitched roof formed by oppositely sloping panels is self-supporting. An integral box girder can also be formed across the underside of the panel at the eaves to rest on the top of the external wall to be loaded with concrete in situ so as to anchor the roof on the walls.

  13. Gap between active and passive solar heating

    SciTech Connect

    Balcomb, J.D.

    1985-01-01

    The gap between active and passive solar could hardly be wider. The reasons for this are discussed and advantages to narrowing the gap are analyzed. Ten years of experience in both active and passive systems are reviewed, including costs, frequent problems, performance prediction, performance modeling, monitoring, and cooling concerns. Trends are analyzed, both for solar space heating and for service water heating. A tendency for the active and passive technologies to be converging is observed. Several recommendations for narrowing the gap are presented.

  14. Solar Space Heat | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Solar Space Heat Jump to: navigation, search TODO: Add description List of Solar Space Heat Incentives Retrieved from "http:en.openei.orgwindex.php?titleSolarSpaceHeat&oldid...

  15. Solar pool heating | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Solar pool heating Jump to: navigation, search Pool Heating is a great use for solar energy. Solar pool heating systems can be very effective and inexpensive. The pool itself is...

  16. Annual DOE active solar heating and cooling contractors' review meeting. Premeeting proceedings and project summaries

    SciTech Connect

    None,

    1981-09-01

    Ninety-three project summaries are presented which discuss the following aspects of active solar heating and cooling: Rankine solar cooling systems; absorption solar cooling systems; desiccant solar cooling systems; solar heat pump systems; solar hot water systems; special projects (such as the National Solar Data Network, hybrid solar thermal/photovoltaic applications, and heat transfer and water migration in soils); administrative/management support; and solar collector, storage, controls, analysis, and materials technology. (LEW)

  17. Passive Solar Space Heat | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Passive Solar Space Heat Jump to: navigation, search TODO: Add description List of Passive Solar Space Heat Incentives Retrieved from "http:en.openei.orgwindex.php?titlePassiv...

  18. Solar space heating | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Solar space heating Jump to: navigation, search (The following text is derived from the United States Department of Energy's description of solar space heating technology.)1...

  19. Water Heating Products and Services | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Water Heating Products and Services Water Heating Products and Services Choosing an efficient water heater will help you save money and Energy. | Photo Credit Energy Department Choosing an efficient water heater will help you save money and Energy. | Photo Credit Energy Department Use the following links to get product information and locate professional services for water heating. Product Information Solar Pool Heating Systems Florida Solar Energy Center Listing of solar pool heating systems

  20. Concentrating solar heat collector

    SciTech Connect

    Fattor, A.P.

    1980-09-23

    A heat storage unit is integrated with a collection unit providing a heat supply in off-sun times, and includes movable insulation means arranged to provide insulation during off-sun times for the heat storage unit.

  1. Water Heating Products and Services | Department of Energy

    Energy Saver

    Find ENERGY STAR Gas Tankless Water Heaters ENERGY STAR Find ENERGY STAR Heat Pump Water Heaters ENERGY STAR Find ENERGY STAR Solar Water Heaters ENERGY STAR Find Product ...

  2. U.S. Virgin Islands- Solar Water Heating Requirement for New Construction

    Energy.gov [DOE]

    In July 2009 the U.S. Virgin Islands enacted legislation creating Act 7075. This legislation requires that all new developments and substantial building modifications install energy efficient solar...

  3. Heat Pump Water Heaters

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

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

  4. Water-heating dehumidifier

    DOEpatents

    Tomlinson, John J.

    2006-04-18

    A water-heating dehumidifier includes a refrigerant loop including a compressor, at least one condenser, an expansion device and an evaporator including an evaporator fan. The condenser includes a water inlet and a water outlet for flowing water therethrough or proximate thereto, or is affixed to the tank or immersed into the tank to effect water heating without flowing water. The immersed condenser design includes a self-insulated capillary tube expansion device for simplicity and high efficiency. In a water heating mode air is drawn by the evaporator fan across the evaporator to produce cooled and dehumidified air and heat taken from the air is absorbed by the refrigerant at the evaporator and is pumped to the condenser, where water is heated. When the tank of water heater is full of hot water or a humidistat set point is reached, the water-heating dehumidifier can switch to run as a dehumidifier.

  5. Total Space Heating Water Heating Cook-

    Annual Energy Outlook

    Tables Total Space Heating Water Heating Cook- ing Other Total Space Heating Water Heating Cook- ing Other All Buildings* ... 634 578 46 1 Q 116.4 106.3...

  6. HUD (Housing and Urban Development) Intermediate Minimum Property Standards Supplement 4930. 2 (1989 edition). Solar heating and domestic hot water systems

    SciTech Connect

    Not Available

    1989-12-01

    The Minimum Property Standards for Housing 4910.1 were developed to provide a sound technical basis for housing under numerous programs of the Department of Housing and Urban Development (HUD). These Intermediate Minimum Property Standards for Solar Heating and Domestic Hot Water Systems are intended to provide a companion technical basis for the planning and design of solar heating and domestic hot water systems. These standards have been prepared as a supplement to the Minimum Property Standards (MPS) and deal only with aspects of planning and design that are different from conventional housing by reason of the solar systems under consideration. The document contains requirements and standards applicable to one- and two-family dwellings, multifamily housing, and nursing homes and intermediate care facilities references made in the text to the MPS refer to the same section in the Minimum Property Standards for Housing 4910.1.

  7. 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...

  8. SOLTECH 92 proceedings: Solar Process Heat Program

    SciTech Connect

    Not Available

    1992-03-01

    This document is a limited Proceedings, documenting the presentations given at the symposia conducted by the US Department of Energy's (DOE) Solar Industrial Program and Solar Thermal Electrical Program at SOLTECH92. The SOLTECH92 national solar energy conference was held in Albuquerque, New Mexico during the period February 17--20, 1992. The National Renewable Energy Laboratory manages the Solar Industrial Program; Sandia National Laboratories (Albuquerque) manages the Solar Thermal Electric Program. The symposia sessions were as follows: (1) Solar Industrial Program and Solar Thermal Electric Program Overviews, (2) Solar Process Heat Applications, (3) Solar Decontamination of Water and Soil; (4) Solar Building Technologies, (5) Solar Thermal Electric Systems, (6) PV Applications and Technologies. For each presentation given in these symposia, these Proceedings provide a one- to two-page abstract and copies of the viewgraphs and/or 35mm slides utilized by the speaker. Some speakers provided additional materials in the interest of completeness. The materials presented in this document were not subjected to a peer review process.

  9. Solar Contractor Licensing | Department of Energy

    Energy.gov [DOE] (indexed site)

    < Back Eligibility InstallersContractors Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Thermal Process Heat Solar Photovoltaics...

  10. Solar space heating | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Solar space heating (Redirected from - Solar Ventilation Preheat) Jump to: navigation, search (The following text is derived from the United States Department of Energy's...

  11. EECBG Success Story: Knox County Detention Facility Goes Solar for Heating Water

    Energy.gov [DOE]

    Hot water demand soars at the six-building Knox County Detention Facility in Tennessee. It's open 24/7 with 1,036 inmate beds and 4,500 meals served daily—and don't forget the laundry. Learn more.

  12. Housing standards: change to HUD 4930. 2 Intermediate Minimum Property Standard (IMPS) supplement for solar heating and domestic hot water systems

    SciTech Connect

    Not Available

    1982-08-17

    This rule is made to provide an updating, clarification, and improvement of requirements contained in HUD Handbook 4930.2, Intermediate Minimum Property Standards (IMPS) Supplement concerning solar heating and domestic hot water systems. Changes pertain to fire protection, penetration, roof covering, conditions of use, thermal stability, rain resistance, ultraviolet stability, and compatibility with transfer medium. Additional changes cover applicable standards, labeling, flash point, chemical and physical commpatibility, flame spread classification, lightening protection, and parts of a solar energy system. Altogether, there are over 50 changes, some of which apply to tables and worksheets. Footnotes are included.

  13. Active Solar Heating | Department of Energy

    Energy Saver

    ... Heating your home with an active solar energy system can significantly reduce your fuel bills in the winter. A solar heating system will also reduce the amount of air pollution and ...

  14. Active Solar Heating | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Active solar heating systems use solar energy to ... Liquid systems are more often used when storage is included, and are well suited ... A solar power system with battery storage can ...

  15. Solar-heated rotary kiln

    DOEpatents

    Shell, P.K.

    1982-04-14

    A solar heated rotary kiln utilized for decomposition of materials, such as zinc sulfate is disclosed. The rotary kiln has an open end and is enclosed in a sealed container having a window positioned for directing solar energy into the open end of the kiln. The material to be decomposed is directed through the container into the kiln by a feed tube. The container is also provided with an outlet for exhaust gases and an outlet for spent solids, and rests on a tiltable base. The window may be cooled and kept clear of debris by coolant gases.

  16. Tips: Passive Solar Heating and Cooling | Department of Energy

    Office of Environmental Management (EM)

    Passive Solar Heating and Cooling Tips: Passive Solar Heating and Cooling July 27, 2014 - 4:18pm Addthis Tips: Passive Solar Heating and Cooling Using passive solar design to heat...

  17. Water Heating | Department of Energy

    Energy Saver

    Water Heating Water Heating September 2, 2015 - 11:07am Addthis Low-flow fixtures will help you reduce your hot water use and save money on your water heating bills. | Photo...

  18. Entech Solar Inc formerly WorldWater Solar Technologies | Open...

    OpenEI (Open Energy Information) [EERE & EIA]

    Solar Inc formerly WorldWater Solar Technologies Jump to: navigation, search Name: Entech Solar Inc. (formerly WorldWater & Solar Technologies) Place: Fort Worth, Texas Zip: 76177...

  19. Solar and Wind Rights | Department of Energy

    Energy.gov [DOE] (indexed site)

    - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Thermal Process Heat Solar Photovoltaics Wind (All) Wind (Small) Program Info Sector Name State State...

  20. Vaillant Solar Systems | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Zip: 92075 Sector: Solar Product: California-based solar company specializing in solar water heating, solar pool heating and solar space heating systems for residential and...

  1. Innovative solar thermochemical water splitting.

    SciTech Connect

    Hogan, Roy E. Jr.; Siegel, Nathan P.; Evans, Lindsey R.; Moss, Timothy A.; Stuecker, John Nicholas; Diver, Richard B., Jr.; Miller, James Edward; Allendorf, Mark D.; James, Darryl L.

    2008-02-01

    Sandia National Laboratories (SNL) is evaluating the potential of an innovative approach for splitting water into hydrogen and oxygen using two-step thermochemical cycles. Thermochemical cycles are heat engines that utilize high-temperature heat to produce chemical work. Like their mechanical work-producing counterparts, their efficiency depends on operating temperature and on the irreversibility of their internal processes. With this in mind, we have invented innovative design concepts for two-step solar-driven thermochemical heat engines based on iron oxide and iron oxide mixed with other metal oxides (ferrites). The design concepts utilize two sets of moving beds of ferrite reactant material in close proximity and moving in opposite directions to overcome a major impediment to achieving high efficiency--thermal recuperation between solids in efficient counter-current arrangements. They also provide inherent separation of the product hydrogen and oxygen and are an excellent match with high-concentration solar flux. However, they also impose unique requirements on the ferrite reactants and materials of construction as well as an understanding of the chemical and cycle thermodynamics. In this report the Counter-Rotating-Ring Receiver/Reactor/Recuperator (CR5) solar thermochemical heat engine and its basic operating principals are described. Preliminary thermal efficiency estimates are presented and discussed. Our ferrite reactant material development activities, thermodynamic studies, test results, and prototype hardware development are also presented.

  2. Estimating the Cost and Energy Efficiency of a Solar Water Heater |

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Department of Energy the Cost and Energy Efficiency of a Solar Water Heater Estimating the Cost and Energy Efficiency of a Solar Water Heater Solar water heaters are more efficient the gas or electric heaters. | Chart credit ENERGY STAR Solar water heaters are more efficient the gas or electric heaters. | Chart credit ENERGY STAR Solar water heating systems usually cost more to purchase and install than conventional water heating systems. However, a solar water heater can usually save you

  3. A Consumer's Guide: Heat Your Water with the Sun (Brochure)

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    ... much of your home's water and interior space. Their popularity is increasing, for several reasons. Solar heating systems are reliable, adaptable, and pollution-free because they ...

  4. Ashland Electric Utility - Bright Way to Heat Water Loan | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Type Loan Program Summary The City of Ashland Conservation Division offers a solar water heating program to residential electric customers who currently use an electric...

  5. Revisions included in HUD Intermediate Minimum Property Standards Supplement 4930. 2, 1977 edition: solar heating and domestic hot-water systems

    SciTech Connect

    Not Available

    1984-04-01

    This addendum to a 1977 HUD publication contains revisions and additions to the existing intermediate minimum property standards supplment for solar heating and cooling systems. Building design revisions cover fire protection, penetrations, and roof coverings. Changes to guidelines for materials, such as those for thermal and ultraviolet stability and moisture resistance, are detailed. Flash points of toxic and combustive fluids, chemical and physical compatibility, and flame spread and resistance of insulation materials are also explained. Construction standards were revised for hail loads; waterproofing insulated exterior storage containers, pipes, and ducts; and for passive systems. Standards also were revised for power-operated protection, dust and dirt prevention, and chimney and vent heights. Radiation temperature, draft control, and thermal energy storage and loss standards were deleted. Other standards for insulation values for thermal devices, lighting protection, and sealing and testing air distribution systems were added. Appended materials contain revisions to calculation procedures for determining the thermal performance of active, solar space heating, and domestic hot water systems. A revised materials list for properties of typical cover materials, absorptive coatings, thermal storage unit containers, and heat-transfer liquids is provided. Revisions to acceptable engineering practice standards are also included.

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

    SciTech Connect

    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)

  7. Water Heating | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Water Heating Water Heating Low-flow fixtures will help you reduce your hot water use and save money on your water heating bills. | Photo courtesy of Huntington Veterans Medical Ctr. Low-flow fixtures will help you reduce your hot water use and save money on your water heating bills. | Photo courtesy of Huntington Veterans Medical Ctr. Water heating accounts for about 18% of your home's energy use. Reducing your hot water use, employing energy-saving strategies, and choosing an energy efficient

  8. Experimental studies on heat transfer and friction factor characteristics of forced circulation solar water heater system fitted with helical twisted tapes

    SciTech Connect

    Jaisankar, S.; Radhakrishnan, T.K.; Sheeba, K.N.

    2009-11-15

    Experimental investigation of heat transfer, friction factor and thermal performance of twisted tape solar water heater with various twist ratios has been conducted and the results are compared with plain tube collector for the same operating conditions with Reynolds number varied from 3000 to 23,000. Experimental data from plain tube collector is validated with the fundamental equations and found that the discrepancy is less than {+-}5.35% and {+-}8.80% for Nusselt number and friction factor, respectively. Correlations have been developed for Nusselt number and friction factor with various twist ratios (Y = 3, 4, 5, 6) and are compared with the experimental values. Results conclude that, heat transfer and pressure drop are higher in twisted tape collector compared to the plain one. Among the various twist ratios, the minimum twist ratio 3 is found to enhance the heat transfer and pressure drop due to swirl generation. As the twist ratio increases, the swirl generation decreases and minimizes the heat transfer and friction factor. (author)

  9. Water Heating Projects | Department of Energy

    Energy Saver

    HVAC, Water Heating, & Appliances Water Heating Projects Water Heating Projects Figure 1: The system model for the combined Water heater, dehumidifier and cooler (WHDC). A ...

  10. Be Sun-sibleŽ about Heating Water

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Be "Sun-sible" about Heating Water Curriculum: Solar Power; (Electromagnetic radiation, conduction/convection, efficiency, Energy transformation, thermodynamics) Grade level: K-4 Whole class or small groups (3 to 4) Time: 120 minutes Summary: In this inquiry-based lesson, students will work in groups to build a solar water heater and will investigate which colors absorb more radiant heat and transmit it to the water, and study the relationship between insulation and heat loss. Teacher

  11. Cost, Design, and Performance of Solar Hot Water in Cold-Climate Homes

    SciTech Connect

    2006-05-03

    This paper examines long-term performance of two solar hot water heating systems in the northern climate zone.

  12. List of Passive Solar Space Heat Incentives | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Solar Space Heat Incentives Jump to: navigation, search The following contains the list of 282 Passive Solar Space Heat Incentives. CSV (rows 1 - 282) Incentive Incentive Type...

  13. List of Solar Pool Heating Incentives | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    List of Solar Pool Heating Incentives Jump to: navigation, search The following contains the list of 117 Solar Pool Heating Incentives. CSV (rows 1 - 117) Incentive Incentive Type...

  14. List of Solar Thermal Process Heat Incentives | Open Energy Informatio...

    OpenEI (Open Energy Information) [EERE & EIA]

    List of Solar Thermal Process Heat Incentives Jump to: navigation, search The following contains the list of 211 Solar Thermal Process Heat Incentives. CSV (rows 1 - 211) Incentive...

  15. A transient heat transfer model for high temperature solar thermochemi...

    Office of Scientific and Technical Information (OSTI)

    Search Results Journal Article: A transient heat transfer model for high temperature solar ... Title: A transient heat transfer model for high temperature solar thermochemical reactors ...

  16. THERMOCHEMICAL HEAT STORAGE FOR CONCENTRATED SOLAR POWER (Technical...

    Office of Scientific and Technical Information (OSTI)

    THERMOCHEMICAL HEAT STORAGE FOR CONCENTRATED SOLAR POWER Citation Details In-Document Search Title: THERMOCHEMICAL HEAT STORAGE FOR CONCENTRATED SOLAR POWER You are accessing a ...

  17. Central Multifamily Water Heating Systems

    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...

  18. Impacts of Water Quality on Residential Water Heating Equipment

    SciTech Connect

    Widder, Sarah H.; Baechler, Michael C.

    2013-11-01

    Water heating is a ubiquitous energy use in all residential housing, accounting for 17.7% of residential energy use (EIA 2012). Today, there are many efficient water heating options available for every fuel type, from electric and gas to more unconventional fuel types like propane, solar, and fuel oil. Which water heating option is the best choice for a given household will depend on a number of factors, including average daily hot water use (total gallons per day), hot water draw patterns (close together or spread out), the hot water distribution system (compact or distributed), installation constraints (such as space, electrical service, or venting accommodations) and fuel-type availability and cost. While in general more efficient water heaters are more expensive than conventional water heating technologies, the savings in energy use and, thus, utility bills can recoup the additional upfront investment and make an efficient water heater a good investment over time in most situations, although the specific payback period for a given installation will vary widely. However, the expected lifetime of a water heater in a given installation can dramatically influence the cost effectiveness and savings potential of a water heater and should be considered, along with water use characteristics, fuel availability and cost, and specific home characteristics when selecting the optimum water heating equipment for a particular installation. This report provides recommendations for selecting and maintaining water heating equipment based on local water quality characteristics.

  19. Solar Easements & Rights Laws | Department of Energy

    Energy.gov [DOE] (indexed site)

    Nonprofit Residential Schools State Government Federal Government Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Thermal Process...

  20. Theoretical and experimental investigation of heat pipe solar collector

    SciTech Connect

    Azad, E.

    2008-09-15

    Heat pipe solar collector was designed and constructed at IROST and its performance was measured on an outdoor test facility. The thermal behavior of a gravity assisted heat pipe solar collector was investigated theoretically and experimentally. A theoretical model based on effectiveness-NTU method was developed for evaluating the thermal efficiency of the collector, the inlet, outlet water temperatures and heat pipe temperature. Optimum value of evaporator length to condenser length ratio is also determined. The modelling predictions were validated using experimental data and it shows that there is a good concurrence between measured and predicted results. (author)

  1. Marshall Municipal Utilities- Solar Thermal Water Heater Rebate Program

    Energy.gov [DOE]

    To invest in a renewable resource, consider an ENERGY STAR Solar Thermal Water Heater and use free energy from the sun to heat your water. Marshall Municipal Utilities (MMU) offers rebates of $20...

  2. Report on Solar Pool Heating Quantitative Survey

    SciTech Connect

    Synapse Infusion Group, Inc.

    1999-05-06

    This report details the results of a quantitative research study undertaken to better understand the marketplace for solar pool-heating systems from the perspective of residential pool owners.

  3. Water Heating Standing Technical Committee Presentation | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Water Heating Standing Technical Committee Presentation Water Heating Standing Technical Committee Presentation This presentation outlines the goals of the Water Heating Standing...

  4. Research & Development Roadmap: Emerging Water Heating Technologies...

    Office of Environmental Management (EM)

    Water Heating Technologies Research & Development Roadmap: Emerging Water Heating Technologies The Research and Development (R&D) Roadmap for Emerging Water Heating Technologies ...

  5. Bazhou Deli Solar Energy Heating Co Ltd aka Deli Solar PRC |...

    OpenEI (Open Energy Information) [EERE & EIA]

    Deli Solar Energy Heating Co Ltd aka Deli Solar PRC Jump to: navigation, search Name: Bazhou Deli Solar Energy Heating Co Ltd (aka Deli Solar (PRC)) Place: Beijing, Beijing...

  6. Solar heating and cooling of residential buildings: sizing, installation and operation of systems. 1980 edition

    SciTech Connect

    1980-09-01

    This manual was prepared as a text for a training course on solar heating and cooling of residential buildings. The course and text are directed toward sizing, installation, operation, and maintenance of solar systems for space heating and hot water supply, and solar cooling is treated only briefly. (MHR)

  7. Solar Heat-Pipe Receiver Wick Modeling

    SciTech Connect

    Andraka, C.E.

    1998-12-21

    Stirling-cycle engines have been identified as a promising technology for the conversion of concentrated solar energy into usable electrical power. In previous experimented work, we have demonstrated that a heat pipe receiver can significantly improve system performance-over a directly-illuminated heater head. The design and operating conditions of a heat pipe receiver differ significantly from typical laboratory heat pipes. New wick structures have been developed to exploit the characteristics of the solar generation system. Typically, these wick structures allow vapor generation within the wick. Conventional heat pipe models do not handle this enhancement yet it can more than double the performance of the wick. In this study, I develop a steady-state model of a boiling-enhanced wick for a solar heat pipe receiver. The model is used for design-point calculations and is written in FORTRAN90. Some limited comparisons have been made with actual test data.

  8. Installation guidelines for Solar Heating System, single-family residence at New Castle, Pennsylvania

    SciTech Connect

    Not Available

    1980-01-01

    The Solar Heating System installer guidelines are provided for each subsystem and includes testing and filling the system. This single-family residential heating system is a solar-assisted, hydronic-to-warm-air system with solar-assisted domestic water heating. It is composed of the following major components: liquid cooled flat plate collectors; water storage tank; passive solar-fired domestic water preheater; electric hot water heater; heat pump with electric backup; solar hot water coil unit; tube-and-shell heat exchanger, three pumps, and associated pipes and valving in an energy transport module; control system; and air-cooled heat purge unit. Information is also provided on the operating procedures, controls, caution requirements, and routine and schedule maintenance. Information consists of written procedures, schematics, detail drawings, pictures and manufacturer's component data.

  9. Sustainable Heat Power Europe GmbH formerly Solar Heat Power...

    OpenEI (Open Energy Information) [EERE & EIA]

    involved in the project development, design and construction of solar thermal, PV and biogas power plants. References: Sustainable Heat & Power Europe GmbH (formerly Solar Heat &...

  10. Shock heating of the solar wind plasma

    SciTech Connect

    Whang, Y.C.; Liu, Shaoliang ); Burlaga, L.F. )

    1990-11-01

    The authors present a study of all shocks observed from Pioneers and Voyagers in 1973-1982. The average shock strength increases with the heliocentric distance outside 1 AU, reaches a maximum near 5 AU, and then decreases with the distance. The increase in the entropy of the solar wind protons across shocks also reaches a maximum near 5 AU. When an average shock propagates through the solar wind, the shock heating increases the entropy of the solar wind protons by approximately 0.8 {times} 10{sup {minus}23} J/K/proton. They also use plasma data from Voyagers and Pioneers between 1 and 30 AU and data from IMP at 1 AU to calculate the increase in the average entropy of solar wind protons with the heliocentric distance. When the distance increases by a factor of 10, the entropy increases by about 4 {times} 10{sup {minus}23} J/K/proton. In order to evaluate the role played by shocks for the heating of the solar wind, they use a MHD simulation model to calculate the entropy changes for the November, 1977 event. Shock heating is the only heating mechanism included in the model. The calculated entropy increase agrees reasonably well with that calculated from observational data. The simulation result suggests that shocks are chiefly responsible for the heating of the solar wind plasma between 1 and 15 AU.

  11. Solar Works in Seattle: Domestic Hot Water

    Office of Energy Efficiency and Renewable Energy (EERE)

    Seattle's residential solar hot water workshop. Content also covers general solar resource assessment, siting, and financial incentives.

  12. Columbia Water & Light- Solar Rebates

    Energy.gov [DOE]

    Columbia Water & Light electric customers are eligible for a $400 rebate for the purchase of a new solar water heater. To apply for this rebate, a customer submits a pre-approval application to...

  13. Tips: Passive Solar Heating and Cooling | Department of Energy

    Energy.gov [DOE] (indexed site)

    Passive Solar Heating and Cooling Using passive solar design to heat and cool your home can be both environmentally friendly and cost effective. In many cases, your heating costs...

  14. Heat from Beneath the Ground - Working to Advance Deep Direct-Use

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    & Cool » Water Heating » 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

  15. Solar Process Heat Basics | NREL

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Solar Powering America U.S. Department of Energy U.S. Department of Agriculture U.S. Environmental Protection Agency U.S. Department of Housing and Urban Development Solar Powering America banner U.S. Department of Housing and Urban Development U.S. Department of Agriculture U.S. Environmental Protection Agency U.S. Department of Energy Solar Powering America is an interagency initiative between the U.S. Department of Energy (DOE), U.S. Department of Agriculture (USDA), U.S. Department of

  16. SOLTECH 92 proceedings: Solar Process Heat Program. Volume 1

    SciTech Connect

    Not Available

    1992-03-01

    This document is a limited Proceedings, documenting the presentations given at the symposia conducted by the US Department of Energy`s (DOE) Solar Industrial Program and Solar Thermal Electrical Program at SOLTECH92. The SOLTECH92 national solar energy conference was held in Albuquerque, New Mexico during the period February 17--20, 1992. The National Renewable Energy Laboratory manages the Solar Industrial Program; Sandia National Laboratories (Albuquerque) manages the Solar Thermal Electric Program. The symposia sessions were as follows: (1) Solar Industrial Program and Solar Thermal Electric Program Overviews, (2) Solar Process Heat Applications, (3) Solar Decontamination of Water and Soil; (4) Solar Building Technologies, (5) Solar Thermal Electric Systems, (6) PV Applications and Technologies. For each presentation given in these symposia, these Proceedings provide a one- to two-page abstract and copies of the viewgraphs and/or 35mm slides utilized by the speaker. Some speakers provided additional materials in the interest of completeness. The materials presented in this document were not subjected to a peer review process.

  17. Tips: Water Heating | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Water Heating Tips: Water Heating Keep your energy bills out of hot water. Insulate your water heater to save ... Drain-water, or greywater, heat recovery systems capture the energy ...

  18. City of Boulder - Solar Access Ordinance | Department of Energy

    Energy.gov [DOE] (indexed site)

    Construction Local Government Residential Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Photovoltaics Program Info Sector Name...

  19. Solar and Wind Easements, Local Options, and Severability | Department...

    Energy.gov [DOE] (indexed site)

    Nonprofit Residential Schools State Government Federal Government Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Thermal...

  20. Water Heating | Department of Energy

    Energy.gov [DOE] (indexed site)

    Low-flow fixtures will help you reduce your hot water use and save money on your water heating bills. | Photo courtesy of Huntington Veterans Medical Ctr. Low-flow fixtures will...

  1. Solar water heaters | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Solar water heaters (Redirected from - Solar Hot Water) Jump to: navigation, search (The following text is derived from the United States Department of Energy's description of...

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

    Energy.gov [DOE]

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

  3. Evaluation of solar collectors for heat pump applications. Final report

    SciTech Connect

    Skartvedt, Gary; Pedreyra, Donald; McMordle, Dr., Robert; Kidd, James; Anderson, Jerome; Jones, Richard

    1980-08-01

    The study was initiated to evaluate the potential utility of very low cost (possibly unglazed and uninsulated) solar collectors to serve as both heat collection and rejection devices for a liquid source heat pump. The approach consisted of exercising a detailed analytical simulation of the complete heat pump/solar collector/storage system against heating and cooling loads derived for typical single-family residences in eight US cities. The performance of each system was measured against that of a conventional air-to-air heat pump operating against the same loads. In addition to evaluation of solar collector options, the study included consideration of water tanks and buried pipe grids to provide thermal storage. As a supplement to the analytical tasks, the study included an experimental determination of night sky temperature and convective heat transfer coefficients for surfaces with dimensions typical of solar collectors. The experiments were conducted in situ by placing the test apparatus on the roofs of houses in the Denver, Colorado, area. (MHR)

  4. List of Heat recovery Incentives | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Heat Solar Thermal Electric Solar Thermal Process Heat Solar Water Heat Energy Storage Nuclear Wind Heat recovery Fuel Cells using Renewable Fuels No Agricultural Energy Efficiency...

  5. Ashland Electric Utility - Bright Way to Heat Water Rebate |...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    average 800 to 1,000) Summary The City of Ashland Conservation Division offers a solar water heating program to its residential electric customers who currently use an electric...

  6. Solar heating and cooling demonstration project at the Florida Solar Energy Center

    SciTech Connect

    Hankins, J.D.

    1980-02-01

    The retrofitted solar heating and cooling system installed at the Florida Solar Energy Center is described. Information is provided on the system's test, operation, controls, hardware and installation, including detailed drawings. The Center's office building, approximately 5000 square feet of space, with solar air conditioning and heating as a demonstration of the technical feasibility is located just north of Port Canaveral, Florida. The system was designed to supply approximately 70% of the annual cooling and 100% of the heating load. The project provides unique high-temperature, non-imaging, non-tracking, evacuated-tube collectors. The design of the system was kept simple and employs five hydronic loops. They are energy collection, chilled water production, space cooling, space heating and energy rejection.

  7. 5 Cool Things about Solar Heating | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    or deductions for solar energy systems. Solar heating systems reduce the amount of air pollution and greenhouse gases that generally come from the use of fossil fuels for...

  8. Potential for Solar Industrial Process Heat in the United States...

    Office of Scientific and Technical Information (OSTI)

    Conference: Potential for Solar Industrial Process Heat in the United States: A Look at California Citation Details In-Document Search Title: Potential for Solar Industrial Process ...

  9. High efficiency water heating system

    SciTech Connect

    Gerstmann, J.; Vasilakis, A.D.

    1984-05-01

    A high efficiency gas fired residential water heater includes an insulated, plastic-lined storage tank. The water in the tank is heated by an external heat exchanger which defines a water-walled combustion chamber. The fuel gas and combustion air burned in the chamber are premixed to a near stoichiometric mixture without the use of a blower. Under the force of line pressure or less, the fuel gas is accelerated into an aspirator/mixer which premixes an amount of air sufficient for complete combustion of the fuel gas. The water-walled combustion chamber is particularly suited for substantial recovery of the heat of a pilot flame. The pilot products of combustion heat water at the upper end of the combustion chamber without causing significant convective flow throughout the heat exchanger.

  10. Efficient Solutions for Existing Homes Case Study: Solar Water...

    Energy Saver

    The developer installed SDHW to reduce fossil-fuel consumption, and CARB has been monitoring the system since its completion. Solar Water Heating in Multifamily Buildings (703.51 ...

  11. Residential Solar Energy Property Tax Exemption | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy Property Tax Exemption Residential Solar Energy Property Tax Exemption < Back Eligibility Residential Savings Category Solar Water Heat Solar Space Heat Solar Photovoltaics...

  12. Solar collection

    SciTech Connect

    Cole, S.L.

    1984-08-01

    This report contains summaries and pictures of projects funded by the Appropriate Technology Small Grants Program which include the following solar technologies: solar dish; photovoltaics; passive solar building and solar hot water system; Trombe wall; hot air panel; hybrid solar heating system; solar grain dryer; solar greenhouse; solar hot water workshops; and solar workshops.

  13. Guide for preparing active solar heating systems operation and maintenance manuals

    SciTech Connect

    Not Available

    1991-01-01

    This book presents a systematic and standardized approach to the preparation of operation and maintenance manuals for active solar heating systems. Provides an industry consensus of the best operating and maintenance procedures for large commercial-scale solar service water and space heating systems. A sample O M manual is included. 3-ring binder included.

  14. Value of solar thermal industrial process heat

    SciTech Connect

    Brown, D.R.; Fassbender, L.L.; Chockie, A.D.

    1986-03-01

    This study estimated the value of solar thermal-generated industrial process heat (IPH) as a function of process heat temperature. The value of solar thermal energy is equal to the cost of producing energy from conventional fuels and equipment if the energy produced from either source provides an equal level of service. This requirement put the focus of this study on defining and characterizing conventional process heat equipment and fuels. Costs (values) were estimated for 17 different design points representing different combinations of conventional technologies, temperatures, and fuels. Costs were first estimated for median or representative conditions at each design point. The cost impact of capacity factor, efficiency, fuel escalation rate, and regional fuel price differences were then evaluated by varying each of these factors within credible ranges.

  15. Cost Effective Water Heating Solutions

    Energy.gov [DOE]

    This presentation was given at the Summer 2012 DOE Building America meeting on July 25, 2012, and addressed the question"Are high-efficiency hot water heating systems worth the cost?"

  16. Tips: Water Heating | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Water Heating Tips: Water Heating Keep your energy bills out of hot water. Insulate your water heater to save energy and money, or choose an on-demand hot water heater to save even ...

  17. Comparative performance indices for solar batch water heaters

    SciTech Connect

    Stickney, B.L.; Aaboe, E.H.

    1981-01-01

    A simple method is developed to allow direct comparison of various solar batch water heaters. Certain system variables must be determined by calculation or measurement which may vary with season. These include Thermal Efficiency of Collection, Tank R value, Collector Surface to Tank Volume Ratio, Clear Day Collection Period in Hours, System Cost, and Installed Solar Heatings Fraction (optional). These variables are used to compute any one of four performance indices. This method allows a valid comparison not only between various solar batch water heaters but between other types of solar water heaters as well. This system may be used by consumers or designers to choose the most cost and performance effective options.

  18. Energy Saver 101: Water Heating Infographic

    Energy.gov [DOE]

    Looking for ways to save money on water heating? Energy Saver 101: Water Heating infographic lays out evergything you need to know about water heating and shares ways to save energy and money.

  19. Heat Pump Water Heaters | Department of Energy

    Energy.gov [DOE] (indexed site)

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

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

    Energy Saver

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

  1. Field Monitoring Protocol: Heat Pump Water Heaters

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

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

  2. Water Heating Standing Technical Committee Presentation

    Energy Saver

    Water Heating Residential Energy Efficiency Stakeholder's Meeting February 29, 2012 - Austin, Texas 2 STC Chairman Responsibilities * To maintain the Water Heating Strategic ...

  3. HVAC, Water Heating, and Appliance Publications | Department...

    Energy Saver

    HVAC, Water Heating, and Appliance Publications HVAC, Water Heating, and Appliance Publications September 19, 2016 Alternative Refrigerant Evaluation for High-Ambient-Temperature ...

  4. Commercial Absorption Heat Pump Water Heater

    Energy Saver

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

  5. CO2 Heat Pump Water Heater

    Energy Saver

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

  6. Savings Project: Lower Water Heating Temperature | Department...

    Energy Saver

    Lower Water Heating Temperature Savings Project: Lower Water Heating Temperature Addthis Project Level Easy Energy Savings 4%-22% annually Time to Complete 2 hours Overall Cost 0 ...

  7. CO2 Heat Pump Water Heater

    Energy Saver

    CO 2 Heat Pump Water Heater 2016 Building Technologies Office Peer Review Kyle ... Purpose and Objectives Problem Statement: - Heat pump water heaters can save significant ...

  8. Do You Have a Solar Water Heater?

    Energy.gov [DOE]

    Earlier this week, Ernie wrote about the economics of getting a solar water heater. As Ernie explained, a solar water heater is more expensive than a normal water heater, but depending on your area...

  9. Residential Solar Water Heating Rebates

    Office of Energy Efficiency and Renewable Energy (EERE)

    The application process consists of two steps. The first step is required for pre-approval and to reserve a rebate, and the second step is the final application for the rebate payment. Systems mu...

  10. Promising Technology: Heat Pump Water Heaters

    Energy.gov [DOE]

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

  11. Energy Saver 101: Water Heating Infographic | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy Saver 101: Water Heating Infographic Energy Saver 101: Water Heating Infographic Looking for ways to save money on water heating? Energy Saver 101: Water Heating infographic ...

  12. Condensing Heating and Water Heating Equipment Workshop Location...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Condensing Heating and Water Heating Equipment Workshop Location: Washington Gas Light Appliance Training Facility 6801 Industrial Road Springfield, VA Date: October 9, 2014 Time: ...

  13. Heat extraction from salinity-gradient solar ponds using heat pipe heat exchangers

    SciTech Connect

    Tundee, Sura; Terdtoon, Pradit; Sakulchangsatjatai, Phrut; Singh, Randeep; Akbarzadeh, Aliakbar

    2010-09-15

    This paper presents the results of experimental and theoretical analysis on the heat extraction process from solar pond by using the heat pipe heat exchanger. In order to conduct research work, a small scale experimental solar pond with an area of 7.0 m{sup 2} and a depth of 1.5 m was built at Khon Kaen in North-Eastern Thailand (16 27'N102 E). Heat was successfully extracted from the lower convective zone (LCZ) of the solar pond by using a heat pipe heat exchanger made from 60 copper tubes with 21 mm inside diameter and 22 mm outside diameter. The length of the evaporator and condenser section was 800 mm and 200 mm respectively. R134a was used as the heat transfer fluid in the experiment. The theoretical model was formulated for the solar pond heat extraction on the basis of the energy conservation equations and by using the solar radiation data for the above location. Numerical methods were used to solve the modeling equations. In the analysis, the performance of heat exchanger is investigated by varying the velocity of inlet air used to extract heat from the condenser end of the heat pipe heat exchanger (HPHE). Air velocity was found to have a significant influence on the effectiveness of heat pipe heat exchanger. In the present investigation, there was an increase in effectiveness by 43% as the air velocity was decreased from 5 m/s to 1 m/s. The results obtained from the theoretical model showed good agreement with the experimental data. (author)

  14. DOE Zero Energy Ready Home Solar Hot Water-Ready Checklist |...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    checklist. PDF icon SHW-Ready Checklists.pdf More Documents & Publications Solar Water Heating: SPECIFICATION, CHECKLIST AND GUIDE DOE Zero Energy Ready Home PV-Ready Checklist ...

  15. Drain-Water Heat Recovery | Department of Energy

    Energy Saver

    Heat & Cool 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. ...

  16. Florida Sunshine -- Natural Source for Heating Water

    SciTech Connect

    Not Available

    2002-05-01

    This brochure, part of the State Energy Program (SEP) Stellar Project series, describes a utility solar hot water program in Lakeland, Florida. It is the first such utility-run solar hot water program in the country.

  17. City of San Jose - Solar Access Design Guidelines | Department...

    Energy.gov [DOE] (indexed site)

    Solar - Passive Solar Water Heat Solar Space Heat Solar Photovoltaics Program Info Sector Name Local Website http:www.sanjoseca.govindex.aspx?NID1725 State California Program...

  18. Solar Energy Sales Tax Exemption | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy Sales Tax Exemption Solar Energy Sales Tax Exemption < Back Eligibility Commercial Industrial Residential Savings Category Solar - Passive Solar Water Heat Solar Space Heat...

  19. Solar and Wind Contractor Licensing | Department of Energy

    Energy.gov [DOE] (indexed site)

    < Back Eligibility InstallersContractors Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Photovoltaics Wind (All) Wind (Small) Program Info Sector Name...

  20. Determining window solar heat gain coefficient

    SciTech Connect

    Harrison, S.J.; Wonderen, S.J. van . Solar Calorimetry Lab.)

    1994-08-01

    The solar heat gain characteristics of fenestration systems impact daytime building energy performance, occupant comfort and utility load demands. A measure of the fraction of available solar energy entering a building interior per unit window area is defined as the solar heat gain coefficient (SHGC). Together with a window's thermal transmittance (U-value), the SHGC is used to compare fenestration products, and it allows for the calculation of energy rating number and annual energy performance. The need to measure and compared advances in window technology has led to the development of experimental and analytical methods for the determination of SHGC performance. Several test facilities currently or previously capable of performing SHGC measurements exist worldwide. Results experimentally determined using these facilities have provided design data for handbook tables, and have been instrumental in the development and validation of predictive analytical methods and computer simulation tools. However, these facilities have operated without a standard test procedure for SHGC performance. Consequently, recent efforts have been focused on developing consensus test procedures for the evaluation of window energy performance.

  1. Monitoring of the performance of a solar heated and cooled apartment building. Final report

    SciTech Connect

    Vliet, G.C.; Srubar, R.L.

    1980-03-01

    An all-electric apartment building in Texas was retrofitted for solar heating and cooling and hot water. The system consists of an array of 1280 square feet of Northrup concentrating tracking collectors, a 5000-gallon hot water storage vessel, a 500-gallon chilled water storage vessel, a 25-ton Arkla Industries absorption chiller, and a two-pipe hydronic air conditioning system. The solar air conditioning equipment is installed in parallel with the existing conventional electric heating and cooling system, and the solar domestic water heating serves as preheat to the existing electric water heaters. The system was fully instrumented for monitoring. Detailed descriptions are given of the solar system, the performance monitoring system, and the data reduction processes. Results are presented and discussed. (WHK)

  2. Solar heating and cooling of residential buildings: design of systems, 1980 edition

    SciTech Connect

    1980-09-01

    This manual was prepared primarily for use in conducting a practical training course on the design of solar heating and cooling systems for residential and small office buildings, but may also be useful as a general reference text. The content level is appropriate for persons with different and varied backgrounds, although it is assumed that readers possess a basic understanding of heating, ventilating, and air-conditioning systems of conventional (non-solar) types. This edition is a revision of the manual with the same title, first printed and distributed by the US Government Printing Office in October 1977. The manual has been reorganized, new material has been added, and outdated information has been deleted. Only active solar systems are described. Liquid and air-heating solar systems for combined space and service water heating or service water heating are included. Furthermore, only systems with proven experience are discussed to any extent.

  3. High Water Heating Bills on Lockdown at Idaho Jail

    Energy.gov [DOE]

    Using funds from the American Recovery and Reinvestment Act, the county is installing a solar thermal hot water system that will provide nearly 70 percent of the power required for heating 600,000 gallons of water for the jail annually.

  4. A performance data network for solar process heat systems

    SciTech Connect

    Barker, G.; Hale, M.J.

    1996-03-01

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

  5. Columbia Water & Light- Solar Energy Loans

    Energy.gov [DOE]

    Columbia Water & Light (CWL) offers electric residential and commercial customers low-interest loans for photovoltaic (PV) systems and solar water heaters.

  6. Solar heating and cooling diode module

    DOEpatents

    Maloney, Timothy J.

    1986-01-01

    A high efficiency solar heating system comprising a plurality of hollow modular units each for receiving a thermal storage mass, the units being arranged in stacked relation in the exterior frame of a building, each of the units including a port for filling the unit with the mass, a collector region and a storage region, each region having inner and outer walls, the outer wall of the collector region being oriented for exposure to sunlight for heating the thermal storage mass; the storage region having an opening therein and the collector region having a corresponding opening, the openings being joined for communicating the thermal storage mass between the storage and collector regions by thermosiphoning; the collector region being disposed substantially below and in parallel relation to the storage region in the modular unit; and the inner wall of the collector region of each successive modular unit in the stacked relation extending over the outer wall of the storage region of the next lower modular unit in the stacked relation for reducing heat loss from the system. Various modifications and alternatives are disclosed for both heating and cooling applications.

  7. Drain-Water Heat Recovery | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Heat & Cool Water Heating Drain-Water Heat Recovery ... Diagram of a drain water heat recovery system. Any hot water ... Drain-water (or greywater) heat recovery systems capture ...

  8. Handbook of experiences in the design and installation of solar heating and cooling systems

    SciTech Connect

    Ward, D.S.; Oberoi, H.S.

    1980-07-01

    A large array of problems encountered are detailed, including design errors, installation mistakes, cases of inadequate durability of materials and unacceptable reliability of components, and wide variations in the performance and operation of different solar systems. Durability, reliability, and design problems are reviewed for solar collector subsystems, heat transfer fluids, thermal storage, passive solar components, piping/ducting, and reliability/operational problems. The following performance topics are covered: criteria for design and performance analysis, domestic hot water systems, passive space heating systems, active space heating systems, space cooling systems, analysis of systems performance, and performance evaluations. (MHR)

  9. List of Solar Space Heat Incentives | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Heat Incentives Jump to: navigation, search The following contains the list of 512 Solar Space Heat Incentives. CSV (rows 1-500) CSV (rows 501-512) Incentive Incentive Type...

  10. Lessons Learned: Devolping Thermochemical Cycles for Solar Heat Storage Applications

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Developing Thermochemical Cycles for Solar Heat Storage Applications General Atomics Bunsen Wong IFT\P2013-001 Workshop on TES for CSP - January 8, 2013 Outline * Introduction * Case Study I: Solid Oxide Decomposition * Case Study II: Sulfur Based Cycle * Conclusions 2 Solar heat is used to drive the reduction step of a thermochemical cycle 3 Thermal Reduction Chemical Storage Re- oxidation * Energy is stored in chemical bonds * Energy is recovered upon chemical re-oxidation heat heat

  11. Affordable Solar Hot Water and Power LLC | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Water and Power LLC Jump to: navigation, search Name: Affordable Solar Hot Water and Power LLC Place: Dothan, Alabama Zip: 36305 Sector: Solar Product: Solar and Energy Efficiency...

  12. Purchasing Energy-Efficient Residential Solar Water Heaters ...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Solar Water Heaters Purchasing Energy-Efficient Residential Solar Water Heaters The Federal Energy Management Program (FEMP) provides acquisition guidance for residential solar ...

  13. The turbulent cascade and proton heating in the solar wind during solar minimum

    SciTech Connect

    Coburn, Jesse T.; Smith, Charles W.; Vasquez, Bernard J.; Stawarz, Joshua E.; Forman, Miriam A.

    2013-06-13

    Solar wind measurements at 1 AU during the recent solar minimum and previous studies of solar maximum provide an opportunity to study the effects of the changing solar cycle on in situ heating. Our interest is to compare the levels of activity associated with turbulence and proton heating. Large-scale shears in the flow caused by transient activity are a source that drives turbulence that heats the solar wind, but as the solar cycle progresses the dynamics that drive the turbulence and heat the medium are likely to change. The application of third-moment theory to Advanced Composition Explorer (ACE) data gives the turbulent energy cascade rate which is not seen to vary with the solar cycle. Likewise, an empirical heating rate shows no significan changes in proton heating over the cycle.

  14. Method of making static solar heat collectors

    SciTech Connect

    Brill-Edwards, K.O.P.

    1983-09-20

    A load-bearing building panel capable of forming an external wall cladding or roof component has a solar heat collecting capacity in the form of channels for heat exchange fluid incorporated in the fabric of the panel. The panel is made of a structural plastics material, such as G.R.P. laminate, successive layers being moulded to simulate tiles. On the back or underside, longitudinal reinforcing beams are built in during laying up of the panel. Between the beams cores or formers defining a matrix or channels are encapsulated in layers of the G.R.P. Wax cores are melted or dissolved out after curing of the panel; metal formers remain embedded in the fabric of the panel. The matrix is connected by flow and return pipes to a heat exchange system within the building. Panels intended for roofing have ridge flanges and wall plates moulded into the substrate at the appropriate pitch angle, and a split capping tube embraces the ridge flanges. A pitched roof formed by oppositely sloping panels is self-supporting. An integral box girder can also be formed across the underside of the panel at the eaves to rest on the top of the external wall to be loaded with concrete in situ so as to anchor the roof on the walls.

  15. Commonwealth Solar Hot Water Commercial Program

    Energy.gov [DOE]

    Beginning in August 2011, the Massachusetts Clean Energy Center (MassCEC) will provide grants* for feasibility studies of commercial solar hot water systems through the Commonwealth Solar Hot Wat...

  16. Central solar heating plants with seasonal storage

    SciTech Connect

    Breger, D.S.; Sunderland, J.E.

    1989-03-01

    The University of Massachusetts has recently started a two year effort to identify and design a significant Central Solar Heating Plant with Seasonal Storage (CSHPSS) in Massachusetts. The work is closely associated with the U.S. participation in the International Energy Agency (IEA) Task on CSHPSS. The University is working closely with the Commonwealth of Massachusetts to assist in identifying State facilities as potential sites and to explore and secure State support which will be essential for product development after the design phase. Currently, the primary site is the University of Massachusetts, Amherst campus with particular interest in several large buildings which are funded for construction over the next 4-5 years. Seasonal thermal energy storage will utilize one of several geological formations.

  17. CORE ELECTRON HEATING IN SOLAR WIND RECONNECTION EXHAUSTS

    SciTech Connect

    Pulupa, M. P.; Salem, C.; Phan, T. D.; Bale, S. D.; Gosling, J. T.

    2014-08-10

    We present observational evidence of core electron heating in solar wind reconnection exhausts. We show two example events, one which shows clear heating of the core electrons within the exhaust, and one which demonstrates no heating. The event with heating occurred during a period of high inflow Alfvn speed (V {sub AL}), while the event with no heating had a low V {sub AL}. This agrees with the results of a recent study of magnetopause exhausts, and suggests that similar core electron heating can occur in both symmetric (solar wind) and asymmetric (magnetopause) exhausts.

  18. Protective tubes for sodium heated water tubes

    DOEpatents

    Essebaggers, Jan

    1979-01-01

    A heat exchanger in which water tubes are heated by liquid sodium which minimizes the results of accidental contact between the water and the sodium caused by failure of one or more of the water tubes. A cylindrical protective tube envelopes each water tube and the sodium flows axially in the annular spaces between the protective tubes and the water tubes.

  19. Heat exchanger for concentrating solar collectors and method for making the heat exchanger

    SciTech Connect

    Stultz, R.A.

    1983-08-09

    nment of the flow passages with the A heat exchanger assembly is disclosed for use with concentrating solar collectors of the type employing an elongated conduit for transporting a heat exchange fluid, the heat exchanger being positioned within an opening in the upper surface of the conduit and operating to transfer heat to the heat exchange fluid. The heat exchanger includes a plurality of stacked heat conducting heat exchanger plates having grooves oriented to form flow passage extending in the direction of fluid flow. The heat direction of heat exchange fluid flow. The grooved heat exchange plates may be fabricated by stamp from a sheet of heat conducting material to facilitate manufacturing of the heat exchanger. In another embodiment, the plates are positioned normal to the fluid flow direction with openings in the plates serving to form flow channels. The heat exchanger is usuable with collectors employing either photovoltaic cells or a solar radiation absorbing flat plate collector.

  20. High heat flux engineering in solar energy applications

    SciTech Connect

    Cameron, C.P.

    1993-07-01

    Solar thermal energy systems can produce heat fluxes in excess of 10,000 kW/m{sup 2}. This paper provides an introduction to the solar concentrators that produce high heat flux, the receivers that convert the flux into usable thermal energy, and the instrumentation systems used to measure flux in the solar environment. References are incorporated to direct the reader to detailed technical information.

  1. Solar heat pump systems with refrigerant-filled collectors

    SciTech Connect

    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.

  2. Solar space heating for the visitors' center, Stephens College, Columbia, Missouri. Final report

    SciTech Connect

    Henley, Marion

    1980-06-01

    This document is the final report of the solar energy system located at the Visitors' Center on the Stephens College Campus, Columbia, Missouri. The system is installed in a four-story, 15,000 square foot building designed to include the college's Admission Office, nine guest rooms for overnight lodging for official guests of the college, a two-story art gallery, and a Faculty Lounge. The solar energy system is an integral design of the building and utilizes 176 Honeywell/Lennox hydronic flat-plate collectors which use a 50% water-ethylene glycol solution and water-to-water heat exchanger. Solar heated water is stored in a 5000 gallon water storage tank located in the basement equipment room. A natural gas fired hot water boiler supplies hot water when the solar energy heat supply fails to meet the demand. The designed solar contribution is 71% of the heating load. The demonstration period for this project ends June 30, 1984.

  3. Reversible window for solar heating and cooling

    SciTech Connect

    Bliamptis, E.E.

    1982-12-28

    A reversible, variably inclinable window with controlled convection for mounting in a window casing in a building for solar heating and cooling comprising a window frame having top and bottom portions and being adapted to pivot about a horizontal axis intermediate said portions, a first window panel mounted in said frame capable of transmitting both visible and infrared radiation, a second window panel mounted in said frame, substantially parallel and in a spaced relationship to said first window panel and being capable of transmitting visible radiation and blocking infrared radiation, and openings proximate to said top and bottom portions for providing air passageways to space between said first and second window panels such that rotation of the assembly about its horizontal axis can place either of the panels toward the outside of the building for selective reflection or absorbtion of the radiant energy to enable heating or cooling of the interior space between the panels in order to utilize the properties of the air caused to pass therethrough; and sealing means at the sides of the window casing for sealing against the window frame while allowing for optimization of the inclination angle of the window with respect to radiant energy impinging thereon.

  4. Solar Water Heaters | Department of Energy

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    The batch collector is a large box holding a tank and covered with a glaze that faces the sun. Water is heated in this tank, and another pipe takes the heated water from the batch...

  5. Rules of thumb for passive solar heating

    SciTech Connect

    Balcomb, J.D.

    1980-01-01

    Rules of thumb are given for passive solar systems for: (1) sizing solar glazing for 219 cities, (2) sizing thermal storage mass, and (3) building orientation.

  6. Beijing Sijimicoe Solar Energy | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Sijimicoe Solar Energy Jump to: navigation, search Name: Beijing Sijimicoe Solar Energy Place: Beijing, China Zip: 102200 Sector: Solar Product: Beijing-based solar water heating...

  7. Acro Solar Lasers | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Acro Solar Lasers Place: El Paso, Texas Zip: 79936 Sector: Solar Product: Makes solar water heating devices based on parabolic dish concentrators. References: Acro Solar...

  8. Solar Water Heaters | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    They are popular in climates prone to freezing temperatures. Illustration of an active, closed loop solar water heater. A large, flat panel called a flat plate collector is ...

  9. Clark Public Utilities- Solar Water Heater Rebate

    Energy.gov [DOE]

    In addition, Clark Public Utilities offers a loan program for eligible solar water heater equipment. For additional information, call Energy Services at (360) 992-3355.

  10. THERMOCHEMICAL HEAT STORAGE FOR CONCENTRATED SOLAR POWER

    SciTech Connect

    PROJECT STAFF

    2011-10-31

    Thermal energy storage (TES) is an integral part of a concentrated solar power (CSP) system. It enables plant operators to generate electricity beyond on sun hours and supply power to the grid to meet peak demand. Current CSP sensible heat storage systems employ molten salts as both the heat transfer fluid and the heat storage media. These systems have an upper operating temperature limit of around 400 C. Future TES systems are expected to operate at temperatures between 600 C to 1000 C for higher thermal efficiencies which should result in lower electricity cost. To meet future operating temperature and electricity cost requirements, a TES concept utilizing thermochemical cycles (TCs) based on multivalent solid oxides was proposed. The system employs a pair of reduction and oxidation (REDOX) reactions to store and release heat. In the storage step, hot air from the solar receiver is used to reduce the oxidation state of an oxide cation, e.g. Fe3+ to Fe2+. Heat energy is thus stored as chemical bonds and the oxide is charged. To discharge the stored energy, the reduced oxide is re-oxidized in air and heat is released. Air is used as both the heat transfer fluid and reactant and no storage of fluid is needed. This project investigated the engineering and economic feasibility of this proposed TES concept. The DOE storage cost and LCOE targets are $15/kWh and $0.09/kWh respectively. Sixteen pure oxide cycles were identified through thermodynamic calculations and literature information. Data showed the kinetics of re-oxidation of the various oxides to be a key barrier to implementing the proposed concept. A down selection was carried out based on operating temperature, materials costs and preliminary laboratory measurements. Cobalt oxide, manganese oxide and barium oxide were selected for developmental studies to improve their REDOX reaction kinetics. A novel approach utilizing mixed oxides to improve the REDOX kinetics of the selected oxides was proposed. It partially

  11. Review of state-of-the-art of solar collector corrosion processes. Task 1 of solar collector studies for solar heating and cooling applications. Final technical progress report

    SciTech Connect

    Clifford, J E; Diegle, R B

    1980-04-11

    The state-of-the-art of solar collector corrosion processes is reviewed, and Task 1 of a current research program on use of aqueous heat transfer fluids for solar heating and cooling is summarized. The review of available published literature has indicated that lack of quantitative information exists relative to collector corrosion at the present time, particularly for the higher temperature applications of solar heating and cooling compared to domestic water heating. Solar collector systems are reviewed from the corrosion/service life viewpoint, with emphasis on various applications, collector design, heat transfer fluids, and freeze protection methods. Available information (mostly qualitative) on collector corrosion technology is reviewed to indicate potential corrosion problem areas and corrosion prevention practices. Sources of limited quantitative data that are reviewed are current solar applications, research programs on collector corrosion, and pertinent experience in related applications of automotive cooling and non-solar heating and cooling. A data bank was developed to catalog corrosion information. Appendix A of this report is a bibliography of the data bank, with abstracts reproduced from presently available literature accessions (about 220). This report is presented as a descriptive summary of information that is contained in the data bank.

  12. A Consumer's Guide: Heat Your Water with the Sun (Brochure)

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Consumer's Guide Heat Your W ater with theSun Bringing you a prosperous future where energy is clean, abundant, reliable, and affordable ii Background What is solar heating? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 What are the basic components of a solar thermal system? . . . . . 2 How have solar systems improved? . . . . . . . . . . . . . . . . . . . . . . . . 5 Investing in solar thermal technologies Why should I invest in a solar thermal system? . . . . . . . . .

  13. Modelling and simulation of elements for solar heating and daylighting

    SciTech Connect

    Wilke, W.S.; Schmid, J. )

    1991-01-01

    Through the development of highly efficient transparent insulation materials (TIM), new opportunities are appearing in the field of daylighting and passive solar space heating. The simulation program WANDSIM, developed at the Fraunhofer-Institut fuer Solare Energiesysteme (ISE), models the dynamic performance of three important elements for daylighting and passive solar space heating; window glazing; transparently insulated masonry; transparently insulated glass wall. Selected simulation results of each type are represented and compared under thermal and daylighting aspects. The advantages of the transparently insulated glass wall, a new combined passive space heating and daylighting system, in economy and comfort are verified.

  14. Study Design And Realization Of Solar Water Heater

    SciTech Connect

    Lounis, M.; Boudjemaa, F.; Akil, S. Kouider

    2011-01-17

    Solar is one of the most easily exploitable energy, it is moreover inexhaustible. His applications are many and are varied. The heating of the domestic water is one of the most immediate, simplest and also of most widespread exploitation of the solar energy. Algeria, from its geographical situation, it deposits one of the largest high sun surface expositions in the world. The exposition duration of the almost territory exceeds 2000 hours annually and can reach the 3900 hours (high plateaus and Sahara). By knowing the daily energy received by 1 m{sup 2} of a horizontal surface of the solar thermal panel is nearly around 1700 KWh/m{sup 2} a year in the north and 2263 KWh/m{sup 2} a year in the south of the country, we release the most important and strategic place of the solar technologies in the present and in the future for Algeria. This work consists to study, conceive and manufacture solar water heating with the available local materials so, this type of the energy will be profitable for all, particularly the poor countries. If we consider the illumination duration of the panel around 6 hours a day, the water heat panel manufactured in our laboratory produce an equivalent energy of 11.615 KWh a day so, 4239 KWh a year. These values of energy can be easily increased with performing the panel manufacture.

  15. Solar wind samples give insight into birth of solar system

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Department of Energy and Wind Easements & Rights Laws & Local Option Solar Rights Law Solar and Wind Easements & Rights Laws & Local Option Solar Rights Law < Back Eligibility Commercial Industrial Local Government Nonprofit Residential Schools State Government Federal Government Agricultural Institutional Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Thermal Process Heat Solar Photovoltaics Wind (All) Solar Pool Heating

  16. OUT Success Stories: Solar Hot Water Technology

    DOE R&D Accomplishments

    Clyne, R.

    2000-08-01

    Solar hot water technology was made great strides in the past two decades. Every home, commercial building, and industrial facility requires hot water. DOE has helped to develop reliable and durable solar hot water systems. For industrial applications, the growth potential lies in large-scale systems, using flat-plate and trough-type collectors. Flat-plate collectors are commonly used in residential hot water systems and can be integrated into the architectural design of the building.

  17. Solar Easements | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    State Government Federal Government Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Thermal Process Heat Solar Photovoltaics Solar Pool Heating Program Info Sector Name State State Kansas Program Type Solar/Wind Access Policy Summary Parties may voluntarily enter into solar easement contracts for the purpose of ensuring adequate exposure of a solar energy system. An easement must be expressed in writing and recorded with the register of deeds for

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

    SciTech Connect

    Vourazelis, D.G.

    1990-12-01

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

  19. Diagnosis of Solar Water Heaters Using Solar Storage Tank Surface Temperature Data: Preprint

    SciTech Connect

    Burch, J.; Magnuson, L.; Barker, G.; Bullwinkel, M.

    2009-04-01

    Study of solar water heaters by using surface temperature data of solar storage tanks to diagnose proper operations.

  20. Residential Solar and Wind Energy Systems Tax Credit

    Energy.gov [DOE]

    Qualifying technologies include solar domestic water heating systems, solar swimming pool and spa heating systems, photovoltaic systems, photovoltaic phones and street lights, passive solar...

  1. SolarIsland aka Yinghua Taian Dazheng Hengyuan Solar Technology...

    OpenEI (Open Energy Information) [EERE & EIA]

    China Zip: 271000 Sector: Solar Product: Manufacturer and exporter of solar passive water heating systems and PV-powered solar road lighting, torches and lamps. References:...

  2. Heat Pump Water Heaters | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

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

  3. Lessons Learned: Devolping Thermochemical Cycles for Solar Heat Storage

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Applications | Department of Energy Lessons Learned: Devolping Thermochemical Cycles for Solar Heat Storage Applications Lessons Learned: Devolping Thermochemical Cycles for Solar Heat Storage Applications This presentation summarizes the introduction given by Bunsen Wong during the Thermochemical Energy Storage Workshop on January 8, 2013. tces_workshop_2013_wong.pdf (1.61 MB) More Documents & Publications Thermochemical Energy Storage CX-100323 Categorical Exclusion Determination

  4. Heat storage and distribution inside passive-solar buildings

    SciTech Connect

    Balcomb, J.D.

    1983-05-01

    Passive solar buildings are investigated from the viewpoint of the storage of solar heat in materials of the building: walls, floors, ceilings, and furniture. The effects of the location, material, thickness, and orientation of each internal building surface are investigated. The concept of diurnal heat capacity is introduced and a method of using this parameter to estimate clear-day temperature swings is developed. Convective coupling to remote rooms within a building is discussed. Design guidelines are given.

  5. Sereno Solar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Name: Sereno Solar Place: Monte Sereno, California Sector: Solar Product: Has developed a solar passive water heating panel to be installed under current roofing or siding...

  6. Aztec Solar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Rancho Cordova, California Zip: 95742 Sector: Solar Product: Installer of solar hot water and pool heating systems. References: Aztec Solar1 This article is a stub. You can...

  7. ESPEE Solar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Karnataka, India Zip: 560 091 Sector: Solar Product: Distributor of solar thermal water heating systems and PV lights. References: ESPEE Solar1 This article is a stub....

  8. Water Heating Standing Technical Committee Presentation

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Standing Technical Committee Water Heating Residential Energy Efficiency Stakeholder's Meeting February 29, 2012 - Austin, Texas 2 STC Chairman Responsibilities * To maintain the...

  9. Passive-Solar-Heating Analysis: a new ASHRAE manual

    SciTech Connect

    Balcomb, J.D.

    1983-01-01

    The forthcoming ASHRAE book, Passive Solar Heating Analysis, is described. ASHRAE approval procedures are discussed. An overview of the contents is given. The development of the solar load ratio correlations is described, and the applicability of the analysis method is discussed.

  10. Performance of evacuated tubular solar collectors in a residential heating and cooling system. Final report, 1 October 1978-30 September 1979

    SciTech Connect

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

    1981-03-01

    Operation of CSU Solar House I during the heating season of 1978-1979 and during the 1979 cooling season was based on the use of systems comprising an experimental evacuated tubular solar collector, a non-freezing aqueous collection medium, heat exchange to an insulated conventional vertical cylindrical storage tank and to a built-up rectangular insulated storage tank, heating of circulating air by solar heated water and by electric auxiliary in an off-peak heat storage unit, space cooling by lithium bromide absorption chiller, and service water heating by solar exchange and electric auxiliary. Automatic system control and automatic data acquisition and computation are provided. This system is compared with others evaluated in CSU Solar Houses I, II and III, and with computer predictions based on mathematical models. Of the 69,513 MJ total energy requirement for space heating and hot water during a record cold winter, solar provided 33,281 MJ equivalent to 48 percent. Thirty percent of the incident solar energy was collected and 29 percent was delivered and used for heating and hot water. Of 33,320 MJ required for cooling and hot water during the summer, 79 percent or 26,202 MJ were supplied by solar. Thirty-five percent of the incident solar energy was collected and 26 percent was used for hot water and cooling in the summer. Although not as efficient as the Corning evacuated tube collector previously used, the Philips experimental collector provides solar heating and cooling with minimum operational problems. Improved performance, particularly for cooling, resulted from the use of a very well-insulated heat storage tank. Day time (on-peak) electric auxiliary heating was completely avoided by use of off-peak electric heat storage. A well-designed and operated solar heating and cooling system provided 56 percent of the total energy requirements for heating, cooling, and hot water.

  11. Solar-assisted heat pump systems and energy storage

    SciTech Connect

    Kaygusuz, K.; Comakli, Oe.; Ahyan, T. )

    1991-01-01

    An experimental solar-assisted heat pump system with solar energy storage in encapsulated phase change material (PCM) packings at the Karadeniz Technical University in Trabzon, Turkey is described. It includes 30 m{sup 2} solar collectors, a latent-heat thermal energy storage tank filled with PCM, a heat exchanger, a heat pump with double evaporators and condenser, and a conventional air conditioning channel. The authors have analyzed the system's behavior from July to August, 1990. The data processed has shown that each of the systems has apparently performed adequately. Collector efficiency is 0.80, heat pump coefficient of performance range is around 7, and the storage efficiency reaches 0.60. When the investigations are accomplished, they will publish the experimental results in detail.

  12. Integrated thermal solar heat pump system

    SciTech Connect

    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.

  13. Solar Hot Water Market Development in Knoxville, TN

    Energy.gov [DOE]

    Assessment of local solar hot water markets, market variables, market barriers, and suggested strategies to increase solar hot water deployment in the city and county.

  14. Solar Water Splitting: Putting an Extra "Eye" on Surface Reactions...

    Office of Science (SC)

    Solar Water Splitting: Putting an Extra "Eye" on Surface Reactions that Store Sunlight as ... Solar Water Splitting: Putting an Extra "Eye" on Surface Reactions that Store Sunlight as ...

  15. Extremely stable bare hematite photoanode for solar water splitting...

    Office of Scientific and Technical Information (OSTI)

    Extremely stable bare hematite photoanode for solar water splitting Prev Next Title: Extremely stable bare hematite photoanode for solar water splitting Authors: Dias, Paula ; ...

  16. [Waste water heat recovery system

    SciTech Connect

    Not Available

    1993-04-28

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

  17. Solar Rights Act | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Rights Act Solar Rights Act < Back Eligibility Commercial Industrial Local Government Nonprofit Residential Schools State Government Federal Government Agricultural Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Thermal Process Heat Solar Photovoltaics Solar Pool Heating Program Info Sector Name State Website http://www.gosolarcalifornia.ca.gov/solar_basics/rights.php State California Program Type Solar/Wind Access Policy Summary The Solar

  18. Solar Water Heaters and the Economy

    Energy.gov [DOE]

    One Coloradan examines the costs and benefits of passive versus conventional water heating systems - and it's effects on property value in the long-term.

  19. Search for new solar cell heats up

    SciTech Connect

    Lipkin, R.

    1990-11-05

    Researchers are in the process of developing an organic solar energy cell with a plasticlike material that simplifies the complicated process of creating a working cell - one that is cheap, easy to produce and has a variety of potential applications. The chemical is polyacetylene and can be painted on anything to become a solar cell.

  20. EcoSolar Systems India Ltd | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    India Zip: 411030 Sector: Solar Product: Manufactures and distributes own-brand solar water heating systems, solar PV lanterns and a solar cooker. Coordinates: 18.52671,...

  1. A theory of heating of quiet solar corona

    SciTech Connect

    Wu, C. S.; Yoon, P. H.; Wang, C. B.

    2015-03-15

    A theory is proposed to discuss the creation of hot solar corona. We pay special attention to the transition region and the low corona, and consider that the sun is quiet. The proposed scenario suggests that the protons are heated by intrinsic Alfvénic turbulence, while the ambient electrons are heated by the hot protons via collisions. The theory contains two prime components: the generation of the Alfvénic fluctuations by the heavy minor ions in the transition region and second, the explanation of the temperature profile in the low solar atmosphere. The proposed heating process operates continuously in time and globally in space.

  2. Comparison of Advanced Residential Water Heating Technologies in the United States

    SciTech Connect

    Maguire, J.; Fang, X.; Wilson, E.

    2013-05-01

    Gas storage, gas tankless, condensing, electric storage, heat pump, and solar water heaters were simulated in several different climates across the US installed in both conditioned and unconditioned space and subjected to several different draw profiles. While many preexisting models were used, new models of condensing and heat pump water heaters were created specifically for this work.

  3. Solar heat collecting panel assembly and method for covering structures

    SciTech Connect

    Brown, D.P.; Jones, I.R.; Vurpillat, V.V.

    1984-06-19

    Panels are formed and mounted in an exterior structure covering assemblage exteriorly simulating a standard exterior structure covering panel assemblage while simultaneously providing a fluid flow network within the panel assemblage for solar heat collection while not substantially disturbing the standard panel assemblage simulation. Generally, the panels have a relatively thin, freely heat transferring exterior layer portion with directly underlying fluid flow channels interconnected between panels for the overall assemblage fluid flow network without substantially disturbing the exterior standard panel simulation. The panels may be formed to simulate any standard roofing or siding panels and the solar heat collecting assemblage may be integrated with adjacent panel assemblages not including the solar heat collecting features with the overall assemblage still maintaining the same standard panel simulation.

  4. WATER POWER SOLAR POWER WIND POWER

    Energy Saver

    coloring book get curren WATER POWER SOLAR POWER WIND POWER Be part of the Clean Energy Generation YOUR HOUSE BIOMASS ENERGY GEOTHERMAL ENERGY Clean energy can come from the sun. ...

  5. Commonwealth Solar Hot Water Residential Program

    Energy.gov [DOE]

    Since February 2011, the Massachusetts Clean Energy Center (MassCEC) has provided rebates for the installation of residential and small commercial solar hot water systems through the Commonwealth...

  6. CPS Energy- Solar Hot Water Rebate Program

    Energy.gov [DOE]

    As part of a larger program designed to reduce electricity demand within its service territory, CPS Energy now offers rebates for solar water heaters to its customers. In general, any CPS Energy...

  7. 15 Ways to Save on Your Water Heating Bill | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    15 Ways to Save on Your Water Heating Bill 15 Ways to Save on Your Water Heating Bill October 26, 2009 - 3:49pm Addthis Allison Casey Senior Communicator, NREL Sometimes it surprises me to see that the most popular pages on the site are the ones about solar water heaters and demand (or tankless) water heaters. But considering that water heating can account for around 12% of a family's utility bill-the biggest chunk after space heating and cooling-it really shouldn't be that surprising that you

  8. Solar heat conversion panel and method of assembly

    SciTech Connect

    Homsy, C.A.; Homsy, P.T.

    1981-01-06

    The panel for converting solar energy to sensible heat of a working fluid comprises a thermally-insulated and impervious base member overlayed with and spaced from a solar-collecting member or collector. The collector is in turn overlayed with and spaced from a pair of mutually spaced impervious films which are essentially transparent to incident solar radiation and substantially opaque to radiation emitted by the collector. The solar-collecting member consists of a thermally-insulating porous matrix substance and of a second substance affixed thereto. The second substance is in divided and substantially discrete form. The second substance exhibits a high degree of absorptivity for solar radiation and low emissivity for long wave radiation. The working fluid to be heated is admitted to a chamber underneath the solar-collecting member. The working fluid has a pressure sufficient to cause it to percolate through the collector. The percolated fluid is collected between the collector and the first overlaying film. The panel assembly is formed by connecting the solar panels in series and/or parallel arrays which carry the working fluid and allow it to absorb the desired quantity of heat.

  9. Water-Heating Dehumidifier - Energy Innovation Portal

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Industrial Technologies Industrial Technologies Building Energy Efficiency Building Energy Efficiency Find More Like This Return to Search Water-Heating Dehumidifier Oak Ridge National Laboratory Contact ORNL About This Technology Technology Marketing SummaryA small appliance developed at ORNL dehumidifies air and then recycles heat to warm water in a water heater. The device circulates cool, dry air in summer and warm air in winter. In addition, the invention can cut the energy required to run

  10. Absorption Heat Pump Water Heater

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Water Heater Kyle Gluesenkamp Building Equipment Group, ETSD gluesenkampk@ornl.gov 865-241-2952 April 3, 2013 CRADA - GE Development of High Performance Residential Gas Water ...

  11. Solar Screening Application for Universities

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Rights Solar Rights < Back Eligibility Residential Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Photovoltaics Daylighting Solar Pool Heating Program Info Sector Name State State Arizona Program Type Solar/Wind Access Policy Summary Arizona law protects individual homeowners' private property rights to solar access by dissolving any local covenant, restriction, or condition attached to a property deed that restricts the use of solar energy.

  12. Solar Rights | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Rights Solar Rights < Back Eligibility Residential Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Photovoltaics Daylighting Solar Pool Heating Program Info Sector Name State State Arizona Program Type Solar/Wind Access Policy Summary Arizona law protects individual homeowners' private property rights to solar access by dissolving any local covenant, restriction, or condition attached to a property deed that restricts the use of solar energy.

  13. Premier Solar Systems Pvt Ltd | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Product: Manufactures PV cells, modules, systems, solar water pumping systems, solar water heating systems and solar garden lights. Coordinates: 17.6726, 77.5971 Show Map...

  14. Solar Hot Water Contractor Licensing

    Energy.gov [DOE]

    In order to obtain one of these specialty licenses, installers must meet the following criteria. The applicant for a Restricted Solar Mechanic license must provide the Arkansas Department of...

  15. Measuring solar reflectance Part I: Defining a metric that accurately predicts solar heat gain

    SciTech Connect

    Levinson, Ronnen; Akbari, Hashem; Berdahl, Paul

    2010-05-14

    Solar reflectance can vary with the spectral and angular distributions of incident sunlight, which in turn depend on surface orientation, solar position and atmospheric conditions. A widely used solar reflectance metric based on the ASTM Standard E891 beam-normal solar spectral irradiance underestimates the solar heat gain of a spectrally selective 'cool colored' surface because this irradiance contains a greater fraction of near-infrared light than typically found in ordinary (unconcentrated) global sunlight. At mainland U.S. latitudes, this metric RE891BN can underestimate the annual peak solar heat gain of a typical roof or pavement (slope {le} 5:12 [23{sup o}]) by as much as 89 W m{sup -2}, and underestimate its peak surface temperature by up to 5 K. Using R{sub E891BN} to characterize roofs in a building energy simulation can exaggerate the economic value N of annual cool-roof net energy savings by as much as 23%. We define clear-sky air mass one global horizontal ('AM1GH') solar reflectance R{sub g,0}, a simple and easily measured property that more accurately predicts solar heat gain. R{sub g,0} predicts the annual peak solar heat gain of a roof or pavement to within 2 W m{sup -2}, and overestimates N by no more than 3%. R{sub g,0} is well suited to rating the solar reflectances of roofs, pavements and walls. We show in Part II that R{sub g,0} can be easily and accurately measured with a pyranometer, a solar spectrophotometer or version 6 of the Solar Spectrum Reflectometer.

  16. Measuring solar reflectance - Part I: Defining a metric that accurately predicts solar heat gain

    SciTech Connect

    Levinson, Ronnen; Akbari, Hashem; Berdahl, Paul

    2010-09-15

    Solar reflectance can vary with the spectral and angular distributions of incident sunlight, which in turn depend on surface orientation, solar position and atmospheric conditions. A widely used solar reflectance metric based on the ASTM Standard E891 beam-normal solar spectral irradiance underestimates the solar heat gain of a spectrally selective ''cool colored'' surface because this irradiance contains a greater fraction of near-infrared light than typically found in ordinary (unconcentrated) global sunlight. At mainland US latitudes, this metric R{sub E891BN} can underestimate the annual peak solar heat gain of a typical roof or pavement (slope {<=} 5:12 [23 ]) by as much as 89 W m{sup -2}, and underestimate its peak surface temperature by up to 5 K. Using R{sub E891BN} to characterize roofs in a building energy simulation can exaggerate the economic value N of annual cool roof net energy savings by as much as 23%. We define clear sky air mass one global horizontal (''AM1GH'') solar reflectance R{sub g,0}, a simple and easily measured property that more accurately predicts solar heat gain. R{sub g,0} predicts the annual peak solar heat gain of a roof or pavement to within 2 W m{sup -2}, and overestimates N by no more than 3%. R{sub g,0} is well suited to rating the solar reflectances of roofs, pavements and walls. We show in Part II that R{sub g,0} can be easily and accurately measured with a pyranometer, a solar spectrophotometer or version 6 of the Solar Spectrum Reflectometer. (author)

  17. Workshop on Condensing Heating and Water Heating Equipment

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Workshop on Condensing Heating and Water Heating Equipment Thursday, October 9, 2014 List of Attendees Organization/Attendees DOE - John Cymbalsky - Ashley Armstrong - Johanna Hariharan AGA - Kathryn Clay - Rick Murphy - Lisa Dundon APGA - Dave Schryver - Bud Miller Gas Technology Institute - Neil Leslie Washington Gas Light - Melissa Adams - Kevin Dunn ACEEE - Harvey Sachs ASAP - Andrew deLaski ASE - Rodney Sobin NRDC - Elizabeth Noll AHRI - Frank Stanonik ACCA - Charlie McCrudden - Glenn

  18. Heat exchange in a multi-cavity volumetric solar receiver

    SciTech Connect

    Carotenuto, A.; Ruocco, G.; Reale, F. )

    1991-01-01

    The concept of a multi-cavity volumetric solar receiver is very attractive for the profitability of certain of its characteristics such as high efficiency and economy. The absorber is based on a pack of small ceramic cavities which intercept and absorb the inherent high solar flux reflected from an array of mirrors. Atmospheric air acts as a coolant medium when it is drawn through the pack. A model for an overall heat transfer performance of the receiver is given and numerically solved.

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

    SciTech Connect

    2010-09-01

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

  20. Heat storage and distribution inside passive-solar buildings

    SciTech Connect

    Balcomb, J.D.

    1983-01-01

    Passive-solar buildings are investigated from the viewpoint of the storage of solar heat in materials of the building: walls, floors, ceilings, and furniture. The effects of the location, material, thickness, and orientation of each internal building surface are investigated. The concept of diurnal heat capacity is introduced and a method of using this parameter to estimate clear-day temperature swings is developed. Convective coupling to remote rooms within a building is discussed, including both convection through single doorways and convective loops that may exist involving a sunspace. Design guidelines are given.

  1. Swiss Solar Tech Ltd | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    energy, Solar Product: the comapny develops, manufactures and constructs solar passive water heating systems combined with geothermal sources through underground heat pumps and...

  2. Solar

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power ... Sciences Applications National Solar Thermal Test Facility Nuclear Energy ...

  3. 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

  4. Research & Development Roadmap: Emerging Water Heating Technologies

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Research and Development (R&D) Roadmap for Emerging Water Heating Technologies provides recommendations to the Building Technologies Office (BTO) on R&D activities to pursue that will aid in achieving BTO’s energy savings goals.

  5. Tracking heat flux sensors for concentrating solar applications

    DOEpatents

    Andraka, Charles E; Diver, Jr., Richard B

    2013-06-11

    Innovative tracking heat flux sensors located at or near the solar collector's focus for centering the concentrated image on a receiver assembly. With flux sensors mounted near a receiver's aperture, the flux gradient near the focus of a dish or trough collector can be used to precisely position the focused solar flux on the receiver. The heat flux sensors comprise two closely-coupled thermocouple junctions with opposing electrical polarity that are separated by a thermal resistor. This arrangement creates an electrical signal proportional to heat flux intensity, and largely independent of temperature. The sensors are thermally grounded to allow a temperature difference to develop across the thermal resistor, and are cooled by a heat sink to maintain an acceptable operating temperature.

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

    Office of Scientific and Technical Information (OSTI)

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

  7. Subcooled Flow Boiling Heat Transfer to Water and Ethylene Glycol...

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Subcooled Flow Boiling Heat Transfer to Water and Ethylene GlycolWater Mixtures in a Bottom-Heated Tube Title Subcooled Flow Boiling Heat Transfer to Water and Ethylene Glycol...

  8. Sizing a New Water Heater | Department of Energy

    Energy.gov [DOE] (indexed site)

    systems: Tankless or demand-type water heaters Solar water heating system Storage and heat pump (with tank) water heaters. For sizing combination water and space heating systems --...

  9. Shanghai Solar Watt Ltd | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    China Zip: 200040 Sector: Renewable Energy, Solar, Wind energy Product: Providing photovoltaic systems, solar air heating systems, solar water pumping systems, wind energy...

  10. Solar Thermochemical Fuels Production: Solar Fuels via Partial Redox Cycles with Heat Recovery

    SciTech Connect

    2011-12-19

    HEATS Project: The University of Minnesota is developing a solar thermochemical reactor that will efficiently produce fuel from sunlight, using solar energy to produce heat to break chemical bonds. The University of Minnesota is envisioning producing the fuel by using partial redox cycles and ceria-based reactive materials. The team will achieve unprecedented solar-to-fuel conversion efficiencies of more than 10% (where current state-of-the-art efficiency is 1%) by combined efforts and innovations in material development, and reactor design with effective heat recovery mechanisms and demonstration. This new technology will allow for the effective use of vast domestic solar resources to produce precursors to synthetic fuels that could replace gasoline.

  11. Heating remote rooms in passive solar buildings

    SciTech Connect

    Balcomb, J.D.

    1981-01-01

    Remote rooms can be effectively heated by convection through a connecting doorway. A simple steady-state equation is developed for design purposes. Validation of a dynamic model is achieved using data obtained over a 13-day period. Dynamic effects are investigated using a simulation analysis for three different cases of driving temperature; the effect is to reduce the temperature difference between the driving room and the remote room compared to the steady-state model. For large temperature swings in the driving room a strategy which uses the intervening door in a diode mode is effective. The importance of heat-storing mass in the remote room is investigated.

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

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

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

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

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

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

  14. HVAC, Water Heating, and Appliance Overview - 2016 BTO Peer Review...

    Energy Saver

    HVAC, Water Heating, and Appliance Overview - 2016 BTO Peer Review HVAC, Water Heating, and Appliance Overview - 2016 BTO Peer Review Presenter: Antonio M. Bouza, U.S. Department ...

  15. Adsorption Heat Pump Water Heater | Department of Energy

    Energy Saver

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

  16. Direct Use for Building Heat and Hot Water Presentation Slides...

    Energy Saver

    Direct Use for Building Heat and Hot Water Presentation Slides and Text Version Direct Use for Building Heat and Hot Water Presentation Slides and Text Version Download ...

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

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

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

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

    Energy Saver

    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 ...

  19. HVAC, Water Heating, and Appliances Overview - 2015 BTO Peer...

    Energy Saver

    HVAC, Water Heating, and Appliances Overview - 2015 BTO Peer Review Presenter: Tony Bouza, U.S. Department of Energy View the Presentation HVAC, Water Heating, and Appliances ...

  20. HVAC, Water Heating, and Appliance Subprogram Overview - 2016...

    Energy Saver

    HVAC, Water Heating, and Appliance Subprogram Overview - 2016 BTO Peer Review HVAC, Water Heating, and Appliance Subprogram Overview - 2016 BTO Peer Review Presenter: Antonio M. ...

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

    Energy Saver

    Residential Absorption Heat Pump Water Heater Residential Absorption Heat Pump Water Heater Photo credit: Oak Ridge National Lab Photo credit: Oak Ridge National Lab Diagram of ...

  2. Warm Springs Water District District Heating Low Temperature...

    OpenEI (Open Energy Information) [EERE & EIA]

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

  3. Solar and Wind Easements & Rights Laws & Local Option Solar Rights Law |

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Department of Energy and Wind Easements & Rights Laws & Local Option Solar Rights Law Solar and Wind Easements & Rights Laws & Local Option Solar Rights Law < Back Eligibility Commercial Industrial Local Government Nonprofit Residential Schools State Government Federal Government Agricultural Institutional Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Thermal Process Heat Solar Photovoltaics Wind (All) Solar Pool Heating

  4. A solar thermal cooling and heating system for a building: Experimental and model based performance analysis and design

    SciTech Connect

    Qu, Ming; Yin, Hongxi; Archer, David H.

    2010-02-15

    A solar thermal cooling and heating system at Carnegie Mellon University was studied through its design, installation, modeling, and evaluation to deal with the question of how solar energy might most effectively be used in supplying energy for the operation of a building. This solar cooling and heating system incorporates 52 m{sup 2} of linear parabolic trough solar collectors; a 16 kW double effect, water-lithium bromide (LiBr) absorption chiller, and a heat recovery heat exchanger with their circulation pumps and control valves. It generates chilled and heated water, dependent on the season, for space cooling and heating. This system is the smallest high temperature solar cooling system in the world. Till now, only this system of the kind has been successfully operated for more than one year. Performance of the system has been tested and the measured data were used to verify system performance models developed in the TRaNsient SYstem Simulation program (TRNSYS). On the basis of the installed solar system, base case performance models were programmed; and then they were modified and extended to investigate measures for improving system performance. The measures included changes in the area and orientation of the solar collectors, the inclusion of thermal storage in the system, changes in the pipe diameter and length, and various system operational control strategies. It was found that this solar thermal system could potentially supply 39% of cooling and 20% of heating energy for this building space in Pittsburgh, PA, if it included a properly sized storage tank and short, low diameter connecting pipes. Guidelines for the design and operation of an efficient and effective solar cooling and heating system for a given building space have been provided. (author)

  5. SODIUM-WATER HEAT EXCHANGER

    DOEpatents

    Simmons, W.R.; Koch, L.J.

    1962-04-17

    A heat exchanger comprising a tank for hot liquid and a plurality of concentric, double tubes for cool liquid extending vertically through the tank is described. These tubes are bonded throughout most of their length but have an unbonded portion at both ends. The inner tubes extend between headers located above and below the tanmk and the outer tubes are welded into tube sheets forming the top and bottom of the tank at locations in the unbonded portions of the tubes. (AEC)

  6. Project Profile: Polyaromatic Naphthalene Derivatives as Solar Heat Transfer Fluids

    Energy.gov [DOE]

    Oak Ridge National Laboratory, under an ARRA CSP Award, is addressing the need for heat transfer fluids (HTFs) for solar power generation that are stable to temperatures approaching 600°C, have good thermal characteristics, and do not react with the vessels in which they are contained.

  7. Salem Electric- Solar Water Heater Rebate

    Energy.gov [DOE]

    Salem Electric residential customers with electric water heating are eligible for a $600 rebate through Salem's Bright Way program. A program brochure with details is available on the program...

  8. Solar Easements | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Local Government Nonprofit Residential Schools State Government Federal Government Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Thermal Process Heat Solar Photovoltaics Program Info Sector Name State State North Dakota Program Type Solar/Wind Access Policy Summary North Dakota's solar easement law is similar to those established by many other states. The law allows a property owner to obtain a solar easement from another property owner for the

  9. Solar Easements | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Water Heat Solar Space Heat Solar Thermal Electric Solar Thermal Process Heat Solar Photovoltaics Program Info Sector Name State State Georgia Program Type Solar/Wind Access Policy Summary In determining that the use of solar energy "can help reduce the nation's reliance upon imported fuels," Georgia encourages the development of solar-energy systems. Accordingly, under Georgia's Solar Easements Act of 1978, easements may be established to allow owners of solar-energy systems to

  10. Do-it-yourself solar heating. Final report

    SciTech Connect

    Stevenson, J.

    1984-01-01

    Presented is a do-it-yourself method of building a solar greenhouse for the purpose of heating a house. During the operational periods, following the construction of the greenhouse, severe problems were encountered. The heat losses at night during the heating season lowered temperatures inside the greenhouse to below freezing on some occasions. Overheating was a problem encountered during the summer months. Daily high and low temperatures are recorded for both inside and outside of the greenhouse. The payback period for the present greenhouse was calculated to be approximately 21.5 years. Recommendations for improving the greenhouse design and efficiency are included. (BCS)

  11. 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

  12. Solar heating panel forming apparatus and method

    SciTech Connect

    Rhodes, R.O.

    1981-01-06

    A supply of hollow plastic tubing is obtained from an extrusion and sizing apparatus, or from a supply of hollow tubing on a reel. The hollow tubing is provided at a predetermined speed to a tensioning device which imparts a tension in the hollow tubing and delivers it to a feeding point at one edge of the periphery of a rotating drum. The continuous hollow tubing is wound around the periphery of the drum at the one edge and it is forced axially on the periphery by a helical shoe overlying the periphery at the one edge. A bank of quartz lamps heats one side of the hollow plastic tubing just prior to reaching the feeding point, and another bank of quartz lamps heats the opposite side of the hollow plastic tubing at the one edge of the drum just after the tubing passes the shoe. The two heated surfaces are pressed together by the axial force exerted by the shoe, and are fused in side by side relation to form a cylinder having a wall consisting of spiral turns of the plastic tubing fused together.

  13. Solar space heating installed at Kansas City, Kansas. Final report

    SciTech Connect

    Not Available

    1981-05-01

    The solar energy system was constructed with the new 48,800 square feet warehouse to heat the warehouse area of about 39,000 square feet while the auxiliary energy system heats the office area of about 9800 square feet. The building is divided into 20 equal units, and each has its own solar system. The modular design permits the flexibility of combining multiple units to form offices or warehouses of various size floor areas as required by a tenant. Each unit has 20 collectors which are mounted in a single row. The collectors, manufactured by Solaron Corporation, are double glazed flat plate collectors with a gross area of 7800 ft/sup 2/. Air is heated either through the collectors or by the electric resistance duct coils. No freeze protection or storage is required for this system. Extracts from the site files, specifications, drawings, installation, operation and maintenance instructions are included.

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

    SciTech Connect

    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)

  15. Aqueous propylene-glycol concentrations for the freeze protection of thermosyphon solar energy water heaters

    SciTech Connect

    Norton, B. ); Edmonds, J.E.J. )

    1991-01-01

    Using a validated dynamic simulation model, the thermal performance of an indirect thermosyphon solar energy water heater was examined. The heat transfer fluids employed were aqueous solutions of propylene glycol. The effect of varying the glycol concentration on the hot water output and efficacy of freeze protection was determined for a specific pattern of hot water withdrawal and weather for the temperature maritime climate of London, England. The heat output is compared with that of a drain-down direct system.

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

    SciTech Connect

    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.

  17. A Consumer's Guide: Heat Your Water with the Sun

    SciTech Connect

    2003-12-01

    This publication introduces consumers to solar heating technologies, and guides them through the basics of the technology and how to purchase it for the home.

  18. A Consumer's Guide: Heat Your Water with the Sun (Brochure)

    Office of Energy Efficiency and Renewable Energy (EERE)

    This publication introduces consumers to solar heating technologies, and guides them through the basics of the technology and how to purchase it for the home.

  19. Solar-powered turbocompressor heat pump system

    DOEpatents

    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.

  20. Testing of Stirling engine solar reflux heat-pipe receivers

    SciTech Connect

    Rawlinson, S.; Cordeiro, P.; Dudley, V.; Moss, T.

    1993-07-01

    Alkali metal heat-pipe receivers have been identified as a desirable interface to couple a Stirling-cycle engine with a parabolic dish solar concentrator. The reflux receiver provides power nearly isothermally to the engine heater heads while de-coupling the heater head design from the solar absorber surface design. The independent design of the receiver and engine heater head leads to high system efficiency. Heat pipe reflux receivers have been demonstrated at approximately 30 kW{sub t} power throughput by others. This size is suitable fm engine output powers up to 10 kW{sub e}. Several 25-kW{sub e}, Stirling-cycle engines exist, as well as designs for 75-kW{sub t} parabolic dish solar concentrators. The extension of heat pipe technology from 30 kW{sub t} to 75 kW{sub t} is not trivial. Heat pipe designs are pushed to their limits, and it is critical to understand the flux profiles expected from the dish, and the local performance of the wick structure. Sandia has developed instrumentation to monitor and control the operation of heat pipe reflux receivers to test their throughput limits, and analytical models to evaluate receiver designs. In the past 1.5 years, several heat pipe receivers have been tested on Sandia`s test bed concentrators (TBC`s) and 60-kW{sub t} solar furnace. A screen-wick heat pipe developed by Dynatherm was tested to 27.5 kW{sub t} throughput. A Cummins Power Generation (CPG)/Thermacore 30-kW{sub t} heat pipe was pushed to a throughput of 41 kW{sub t} to verify design models. A Sandia-design screen-wick and artery 75-kW{sub t} heat pipe and a CPG/Thermacore 75-kW{sub t} sintered-wick heat pipe were also limit tested on the TBC. This report reviews the design of these receivers, and compares test results with model predictions.

  1. Development of a 75-kW heat-pipe receiver for solar heat-engines

    SciTech Connect

    Adkins, D.R.; Andraka, C.E.; Moss, T.A.

    1995-05-01

    A program is now underway to develop commercial power conversion systems that use parabolic dish mirrors in conjunction with Stirling engines to convert solar energy to electric power. In early prototypes, the solar concentrator focused light directly on the heater tubes of the Stirling engine. Liquid-metal heat-pipes are now being developed to transfer energy from the focus of the solar concentrator to the heater tubes of the engine. The dome-shaped heat-pipe receivers are approximately one-half meters in diameter and up to 77-kW of concentrated solar energy is delivered to the absorber surface. Over the past several years, Sandia National Laboratories, through the sponsorship of the Department of Energy, has conducted a major program to explore receiver designs and identify suitable wick materials. A high-flux bench-scale system has been developed to test candidate wick designs, and full-scale systems have been tested on an 11-meter test-bed solar concentrator. Procedures have also been developed in this program to measure the properties of wick materials, and an extensive data-base on wick materials for high temperature heat pipes has been developed. This paper provides an overview of the receiver development program and results from some of the many heat-pipe tests.

  2. Heat Pipe Solar Receiver Development Activities at Sandia National Laboratories

    SciTech Connect

    Adkins, D.R.; Andraka, C.E.; Moreno, J.B.; Moss, T.A.; Rawlinson, K.S.; Showalter, S.K.

    1999-01-08

    Over the past decade, Sandia National Laboratories has been involved in the development of receivers to transfer energy from the focus of a parabolic dish concentrator to the heater tubes of a Stirling engine. Through the isothermal evaporation and condensation of sodium. a heat-pipe receiver can efficiently transfer energy to an engine's working fluid and compensate for irregularities in the flux distribution that is delivered by the concentrator. The operation of the heat pipe is completely passive because the liquid sodium is distributed over the solar-heated surface by capillary pumping provided by a wick structure. Tests have shown that using a heat pipe can boost the system performance by twenty percent when compared to directly illuminating the engine heater tubes. Designing heat pipe solar receivers has presented several challenges. The relatively large area ({approximately}0.2 m{sup 2}) of the receiver surface makes it difficult to design a wick that can continuously provide liquid sodium to all regions of the heated surface. Selecting a wick structure with smaller pores will improve capillary pumping capabilities of the wick, but the small pores will restrict the flow of liquid and generate high pressure drops. Selecting a wick that is comprised of very tine filaments can increase the permeability of the wick and thereby reduce flow losses, however, the fine wick structure is more susceptible to corrosion and mechanical damage. This paper provides a comprehensive review of the issues encountered in the design of heat pipe solar receivers and solutions to problems that have arisen. Topics include: flow characterization in the receiver, the design of wick systems. the minimization of corrosion and dissolution of metals in sodium systems. and the prevention of mechanical failure in high porosity wick structures.

  3. Heat Pump Water Heater using Solid-State Energy Converters |...

    Energy Saver

    Heat Pump Water Heater using Solid-State Energy Converters Sheetak will work on developing a full scale prototype of its low cost heat pump water heater. These solid state heat ...

  4. Solar heating system installed at Troy, Ohio. Final report

    SciTech Connect

    1980-09-01

    This document is the Final Report of the Solar Energy System located at Troy-Miami County Public Library, Troy, Ohio. The completed system is composed of tree basic subsystems: the collector system consisting of 3264 square feet of Owens Illinois evacuated glass tube collectors; the storage system which includes a 5000-gallon insulated steel tank; and the distribution and control system which includes piping, pumping and control logic for the efficient and safe operation of the entire system. This solar heating system was installed in an existing facility and is, therefore, a retrofit system. This report includes extracts from the site files, specifications, drawings, installation, operation and maintenance instructions.

  5. Solar heating and cooling system installed at Leavenworth, Kansas. Final report

    SciTech Connect

    Perkins, R. M.

    1980-06-01

    The solar heating and cooling system installed at the headquarters of Citizens Mutual Savings Association in Leavenworth, Kansas, is described in detail. The project is part of the U.S. Department of Energy's solar demonstration program and became operational in March, 1979. The designer was TEC, Inc. Consulting Engineers, Kansas City, Missouri and contractor was Norris Brothers, Inc., Lawrence, Kansas. The solar system is expected to furnish 90 percent of the overall heating load, 70 percent of the cooling load and 100 percent of the domestic hot water load. The building has two floors with a total of 12,000 square feet gross area. The system has 120 flat-plate liquid solar panels with a net area of 2200 square feet. Five, 3-ton Arkla solar assisted absorption units provide the cooling, in conjunction with a 3000 gallon chilled water storage tank. Two, 3000 gallon storage tanks are provided with one designated for summer use, whereas both tanks are utilized during winter.

  6. Market development directory for solar industrial process heat systems

    SciTech Connect

    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).

  7. U.S. Virgin Islands- Solar Water Heater Rebate Program

    Energy.gov [DOE]

    A household can receive a maximum of two solar water heater rebates. Rebate amounts vary slightly based upon installed equipment. Rebates will be $1,250 for solar water heaters with an OG-300 rat...

  8. Side-by-Side Testing of Water Heating Systems: Results from the 2009-2010 Evaluation

    Energy.gov [DOE]

    The performance of seven differing types of residential water heating systems was compared in a side-by-side test configuration over a full year period. The Hot Water System Laboratory (HWS Lab) test facility at the Florida Solar Energy Center (FSEC) in Cocoa, FL was used for the tests.

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

    SciTech Connect

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

    2009-08-15

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

  10. Low-Cost Batch Solar Water Heater Research and Development Project: results from extended field monitoring. Final report, January 1, 1983-May 15, 1983

    SciTech Connect

    Stickney, B.L.

    1984-02-01

    This report contains the results of a four month field test and evaluation of a 30 gallon inverted batch solar water heater known as the Bottomgainer. It was installed on a residence in Santa Fe and monitored with automatic data recorders including solar radiation meter, dual channel Btu meters, water meter and 16 channel strip chart temperature recorder. Average values of heat gain, heat loss, collection efficiency, solar heating fraction and cash benefits are presented and discussed.

  11. Gulf Power- Solar Thermal Water Heating Program

    Energy.gov [DOE]

    A limited amount of funding is still available for 2015. Theprogram website will be updated if more fund become available.

  12. KIUC- Solar Water Heating Loan Program

    Energy.gov [DOE]

    Through a partnership with Kauai Community Federal Credit Union (KCFCU) and Kauai County Housing Agency (KCHA), the Kauai Island Utility Cooperative (KIUC) provides qualifying members with zero...

  13. Future Heating | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    London, England, United Kingdom Sector: Solar Product: Designs and installs solar passive water heating systems. Coordinates: 51.506325, -0.127144 Show Map Loading map......

  14. Water Heating Products and Services | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Water Heating Products and Services Water Heating Products and Services May 29, 2012 - 7:04pm Addthis Choosing an efficient water heater will help you save money and Energy. |...

  15. Save on Home Water Heating | Department of Energy

    Energy Saver

    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 ...

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

    Energy Saver

    Water Heating AskEnergySaver: Home Water Heating March 24, 2014 - 11:35am Addthis Did you know: Water heaters account for nearly 17 percent of a homes energy use, consuming ...

  17. Building America Standing Technical Committee- Water Heating

    Energy.gov [DOE]

    The Building America program is focused on delivering market acceptable energy efficiency solutions to homeowners, builders, and contractors. Near term goals of 30-50% source energy savings are currently targeted. This document examines water heating gaps and barriers, and is updated as of Feb. 2012.

  18. Solar and nuclear energy expertise to be enhanced by research centers

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Heat & Cool » Water Heating » Solar Water Heaters Solar Water Heaters 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 Energy Laboratory Solar water heaters -- also called solar domestic hot water systems -- can be a cost-effective way to generate hot water for your home. They can be used in

  19. Transpired Solar Collector at NREL's Waste Handling Facility Uses Solar Energy to Heat Ventilation Air

    SciTech Connect

    2010-09-08

    The transpired solar collector was installed on NREL's Waste handling Facility (WHF) in 1990 to preheat ventilation air. The electrically heated WHF was an ideal candidate for the this technology - requiring a ventilation rate of 3,000 cubic feet per meter to maintain safe indoor conditions.

  20. Monitoring SERC Technologies - Solar Hot Water | Department of...

    Energy Saver

    Hot Water Monitoring SERC Technologies - Solar Hot Water On October 27, 2011, Eliza Hotchkiss, an analyst at the National Renewable Energy Laboratory, presented a Webinar about ...

  1. HVAC, Water Heating, and Appliances | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Emerging Technologies » HVAC, Water Heating, and Appliances HVAC, Water Heating, and Appliances About the Portfolio The HVAC/Water Heating/Appliance subprogram develops cost effective, energy efficient technologies with national labs and industry partners. Technical analysis has shown that heat pumps have the technical potential to save up to 50% of the energy used by conventional HVAC technologies in residential buildings. Our focus is on the introduction of new heat pumping technologies, heat

  2. Solar/Wind Contractor Licensing | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Licensing Louisiana InstallerContractor Photovoltaics Solar Water Heat Yes Tennessee Solar Panel Installation Specialty and Solar Thermal-Geothermal Licensing (Tennessee)...

  3. Orlando Utilities Commission- Solar Programs

    Energy.gov [DOE]

    The Orlando Utilities Commission (OUC) also offers incentive for solar hot water heating systems. Commercial solar hot water heating systems receive a $0.03 per kWh equivalent. Residential...

  4. Lumos Solar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Place: Boulder, Colorado Zip: 80301 Sector: Solar Product: A supplier of solar passive water heating systems and small PV systems. Coordinates: 42.74962, -109.714163 Show...

  5. Felt-metal-wick heat-pipe solar receiver

    SciTech Connect

    Andraka, C.E.; Adkins, D.R.; Moss, T.A.; Cole, H.M.; Andreas, N.H.

    1994-12-31

    Reflux heat-pipe receivers have been identified as a desirable interface to couple a Stirling-cycle engine with a parabolic dish solar concentrator. The reflux receiver provides power nearly isothermally to the engine heater heads while decoupling the heater head design from the solar absorber surface design. The independent design of the receiver and engine heater head leads to higher system efficiency. Heat pipe reflux receivers have been demonstrated at approximately 65 kW{sub t} power throughput. Several 25 to 30-kW{sub e} Stirling-cycle engines are under development, and will soon be incorporated in commercial dish-Stirling systems. These engines will require reflux receivers with power throughput limits reaching 90-kW{sub t}. The extension of heat pipe technology from 60 kW{sub t} to 100 kW{sub t} is not trivial. Current heat pipe wick technology is pushed to its limits. It is necessary to develop and test advanced wick structure technologies to perform this task. Sandia has developed and begun testing a Bekaert Corporation felt metal wick structure fabricated by Porous Metal Products Inc. This wick is about 95% porous, and has liquid permeability a factor of 2 to 8 times higher than conventional technologies for a given maximum pore radius. The wick has been successfully demonstrated in a bench-scale heat pipe, and a full-scale on-sun receiver has been fabricated. This report details the wick design, characterization and installation into a heat pipe receiver, and the results of the bench-scale tests are presented. The wick performance is modeled, and the model results are compared to test results.

  6. Refrigerant charge management in a heat pump water heater

    SciTech Connect

    Chen, Jie; Hampton, Justin W.

    2014-06-24

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

  7. Solar Equipment Certification Requirement

    Energy.gov [DOE]

    All active solar space-heating and water-heating systems that are sold, offered for sale, or installed on residential and commercial buildings in Minnesota must meet Solar Rating and Certification...

  8. Solar Easements | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Residential Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Photovoltaics Program Info Sector Name State State Alaska Program Type Solar/Wind Access Policy Summary Alaska's solar easement provisions are similar to those in many other states. They do not create an automatic right to sunlight. Rather, they allow parties to voluntarily enter into solar easement contracts for the purpose of ensuring adequate exposure of a solar energy system. Source

  9. Solar conductive spa water heater and safety cover

    SciTech Connect

    Ely, G.W.

    1987-04-28

    This patent describes a solar conductive portable cover for a spa which has an opening for access comprising a rigid plastic member vacuum formed in a series of interconnected parallel U-shaped channels. Each channel is separated from an adjacent channel by a wall. A shape conforms plastic top solvent or heat is welded to a top surface of the walls to form a cover wider in diameter than the opening of the spa, such that the cover rests on coping at the top of the spa. Method is described for heating water for a spa comprising covering the top of the spa with a portable rigid thin plastic member forming a cover wider than the opening of the spa such that the cover rests on coping at the top of the spa and having a series of parallel U-shaped channels.

  10. Field Monitoring Protocol: Heat Pump Water Heaters

    SciTech Connect

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

    2013-02-01

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

  11. What to expect from a batch solar water heater

    SciTech Connect

    Stickney, B.

    1984-01-01

    Batch solar water heaters are becoming more popular because of their low initial cost and simplicity of operation. Batch type water heaters have the following features in common: a water tank or tanks, an insulated tank enclosure, a glazed collecter surface, and a reflector system. The advantages of this type of solar water heater are discussed.

  12. Solar

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Applications National Solar Thermal Test Facility ... EnergyWater Nexus EnergyWater History Water Monitoring & ... Market Transformation Fuel Cells Predictive Simulation of ...

  13. Alfvn wave solar model (AWSoM): Coronal heating

    SciTech Connect

    Van der Holst, B.; Sokolov, I. V.; Meng, X.; Jin, M.; Manchester, W. B. IV; Tth, G.; Gombosi, T. I.

    2014-02-20

    We present a new version of the Alfvn wave solar model, a global model from the upper chromosphere to the corona and the heliosphere. The coronal heating and solar wind acceleration are addressed with low-frequency Alfvn wave turbulence. The injection of Alfvn wave energy at the inner boundary is such that the Poynting flux is proportional to the magnetic field strength. The three-dimensional magnetic field topology is simulated using data from photospheric magnetic field measurements. This model does not impose open-closed magnetic field boundaries; those develop self-consistently. The physics include the following. (1) The model employs three different temperatures, namely the isotropic electron temperature and the parallel and perpendicular ion temperatures. The firehose, mirror, and ion-cyclotron instabilities due to the developing ion temperature anisotropy are accounted for. (2) The Alfvn waves are partially reflected by the Alfvn speed gradient and the vorticity along the field lines. The resulting counter-propagating waves are responsible for the nonlinear turbulent cascade. The balanced turbulence due to uncorrelated waves near the apex of the closed field lines and the resulting elevated temperatures are addressed. (3) To apportion the wave dissipation to the three temperatures, we employ the results of the theories of linear wave damping and nonlinear stochastic heating. (4) We have incorporated the collisional and collisionless electron heat conduction. We compare the simulated multi-wavelength extreme ultraviolet images of CR2107 with the observations from STEREO/EUVI and the Solar Dynamics Observatory/AIA instruments. We demonstrate that the reflection due to strong magnetic fields in the proximity of active regions sufficiently intensifies the dissipation and observable emission.

  14. Comparison of Advanced Residential Water Heating Technologies in the United States

    SciTech Connect

    Maguire, Jeff; Fang, Xia; Wilson, Eric

    2013-05-01

    In this study, gas storage, gas tankless, condensing, electric storage, heat pump, and solar water heaters were simulated in several different climates across the United States, installed in both conditioned and unconditioned space and subjected to several different draw profiles. While many pre-existing models were used, new models of condensing and heat pump water heaters were created specifically for this work. In each case modeled, the whole house was simulated along with the water heater to capture any interactions between the water heater and the space conditioning equipment.

  15. Solar Heating & Cooling: Energy for a Secure Future

    Energy.gov [DOE]

    Today, more than 30,000 solar heating and cooling systems (SHC) are being installed annually in the United States, employing more than 5,000 American workers from coast to coast. These numbers are good – but they can be a lot better. Installing more SHC systems would provide a huge boost to the economy and help the environment, too. This first-of-its-kind SHC roadmap, developed by a task force made up of SEIA-member companies and BEAM Engineering, lays the groundwork – as well as makes a compelling case – for driving installed SHC capacity from 9 GW thermal to 300 GW thermal by 2050.

  16. Orlando Utilities Commission- Residential Solar Water Heater Rebate Program

    Energy.gov [DOE]

    Through a partnership with the Orlando Federal Credit Union (OFCU), OUC also offers a Residential Solar Loan Program to finance the solar hot water system. Customers who choose to finance through...

  17. Enhanced Geothermal Systems: Comparing Water and CO2 as Heat...

    Office of Scientific and Technical Information (OSTI)

    ENHANCED GEOTHERMAL SYSTEMS (EGS): COMPARING WATER AND CO 2 AS HEAT TRANSMISSION FLUIDS ... with supercritical CO 2 instead of water as heat transmission fluid (D.W. Brown, 2000). ...

  18. Hot New Advances in Water Heating Technology | Department of...

    Energy Saver

    Hot New Advances in Water Heating Technology Hot New Advances in Water Heating Technology April 18, 2013 - 1:15pm Addthis Learn how a cooperative R&D agreement with the Energy ...

  19. Heat Transfer and Latent Heat Storage in Inorganic Molten Salts for Concentrating Solar Power Plants

    SciTech Connect

    Mathur, Anoop

    2013-08-14

    A key technological issue facing the success of future Concentrating Solar Thermal Power (CSP) plants is creating an economical Thermal Energy Storage (TES) system. Current TES systems use either sensible heat in fluids such as oil, or molten salts, or use thermal stratification in a dual-media consisting of a solid and a heat-transfer fluid. However, utilizing the heat of fusion in inorganic molten salt mixtures in addition to sensible heat , as in a Phase change material (PCM)-based TES, can significantly increase the energy density of storage requiring less salt and smaller containers. A major issue that is preventing the commercial use of PCM-based TES is that it is difficult to discharge the latent heat stored in the PCM melt. This is because when heat is extracted, the melt solidifies onto the heat exchanger surface decreasing the heat transfer. Even a few millimeters of thickness of solid material on heat transfer surface results in a large drop in heat transfer due to the low thermal conductivity of solid PCM. Thus, to maintain the desired heat rate, the heat exchange area must be large which increases cost. This project demonstrated that the heat transfer coefficient can be increase ten-fold by using forced convection by pumping a hyper-eutectic salt mixture over specially coated heat exchanger tubes. However,only 15% of the latent heat is used against a goal of 40% resulting in a projected cost savings of only 17% against a goal of 30%. Based on the failure mode effect analysis and experience with pumping salt at near freezing point significant care must be used during operation which can increase the operating costs. Therefore, we conclude the savings are marginal to justify using this concept for PCM-TES over a two-tank TES. The report documents the specialty coatings, the composition and morphology of hypereutectic salt mixtures and the results from the experiment conducted with the active heat exchanger along with the lessons learnt during

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

    Office of Scientific and Technical Information (OSTI)

    ... types of water heaters, particularly solar water heaters. Mathematical comparison of these two types is made in the NREL report "Low-Cost Solar Water Heating Research and ...

  1. Solar heat gain through a skylight in a light well

    SciTech Connect

    Klems, J.H.

    2001-08-01

    Detailed heat flow measurements on a skylight mounted on a light well of significant depth are presented. It is shown that during the day much of the solar energy that strikes the walls of the well does not reach the space below. Instead, this energy is trapped in the stratified air of the light well and eventually either conducted through the walls of the well or back out through the skylight. The standard model for predicting fenestration heat transfer does not agree with the measurements when it is applied to the skylight/well combination as a whole (the usual practice), but does agree reasonably well when it is applied to the skylight alone, using the well air temperature near the skylight. A more detailed model gives good agreement. Design implications and future research directions are discussed.

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

    SciTech Connect

    Not Available

    2012-02-01

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

  3. Energy Saving Absorption Heat Pump Water Heater - Energy Innovation Portal

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Building Energy Efficiency Building Energy Efficiency Find More Like This Return to Search Energy Saving Absorption Heat Pump Water Heater Oak Ridge National Laboratory Contact ORNL About This Technology Technology Marketing SummaryORNL's new absorption heat pump and water heater technology offers substantial energy savings and can reduce the use of fossil fuels by buildings. While conventional heat pump water heater designs are limited to using toxic ammonia water systems, this system uses heat

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

    Energy Saver

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

  5. Boiling water reactor-full length emergency core cooling heat...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Boiling water reactor-full length emergency core cooling heat transfer ... Citation Details In-Document Search Title: Boiling water reactor-full length emergency ...

  6. Recovery of Water from Boiler Flue Gas Using Condensing Heat...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Recovery of Water from Boiler Flue Gas Using Condensing Heat Exchangers Citation Details In-Document Search Title: Recovery of Water from Boiler Flue Gas Using ...

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

    Office of Scientific and Technical Information (OSTI)

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

  8. Grid-Interactive Renewable Water Heating Economic and Environmental...

    Energy Saver

    1 Grid-Interactive Renewable Water Heating Economic and Environmental Value Grid-interactive renewable water heaters have smart controls that quickly change their charge rate and ...

  9. HVAC, Water Heating and Appliances Sub-Program Logic Model

    Energy Saver

    & water heating technologies Researchers equipped with validated solutions to develop or improve components & optimize tech. systems at reduced cost High-efficiency HVAC, water ...

  10. Evaluation of solar heat gain coefficient for solar-control glazings and shading devices

    SciTech Connect

    Harrison, S.J.; Wonderen, S.J. van

    1998-10-01

    The determination of solar heat gain coefficient (SHGC) values for complex fenestration systems is required to evaluate building energy performance, to estimate peak electrical loads, and to ensure occupant comfort. In the past, simplified techniques have been used to calculate the values of SHGC for fenestration systems. As glazing systems that incorporate complex geometries become more common, test methods are required to evaluate these products and to aid in the development of new computational tools. Recently, a unique facility and test method for the experimental determination of SHGC values were developed and demonstrated for simple fenestration systems. The study described in this paper further applies this method to a variety of commercially available glazing and shading systems (e.g., heat-absorbing insulated glazing units (IGUs), reflective film and suspended film IGUs), and shading devices (i.e., slat blinds and shades). Testing was conducted in a solar simulator facility using a specially designed window calorimeter. The results of this study demonstrate the feasibility of the solar simulator-based test method for the evaluation of SHGC values for solar-control glazings and shading devices.

  11. Characteristics, design implications, and applicability of passive solar heating systems for buildings

    SciTech Connect

    Givoni, B. )

    1991-01-01

    The paper reviews the performance characteristics of various passive solar heating systems for buildings, the main design factors affecting their performance, the relative advantages and main problems associated with them, and their applicability to different building types and climatic regions. Emphasis is placed on the architectural design issues associated with the different passive solar heating systems and to the problems that may be encountered when passive solar heating is applied in regions with hot summers.

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

    SciTech Connect

    Zinnes, I.; Lior, N.

    1980-05-01

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

  13. Advanced Heat/Mass Exchanger Technology for Geothermal and solar Renewable Energy Systems

    Office of Energy Efficiency and Renewable Energy (EERE)

    Advanced Heat/Mass Exchanger Technology for Geothermal and solar Renewable Energy Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

  14. Line-focus solar central power system, phase I. Subsystem experiment: receiver heat transfer

    SciTech Connect

    Slemmons, A J

    1980-04-01

    Wind-tunnel tests confirmed that heat losses due to natural convection are negligible in the line-focus, solar-powered receiver. Anomalies in the forced-convection tests prevented definitive conclusions regarding the more important forced convection. Flow-visualization tests using a water table show much lower velocities inside the receiver cavity than outside, supporting the supposition that the forced-heat transfer should be less than that from a standard exposed cylinder. Furthermore, the water-table tests showed ways to decrease the low velocities in the cavity should this be desired. Further wind-tunnel testing should be done to confirm estimates and to support advanced design. This testing can be done in standard wind tunnels since only the forced convection is of concern.

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

    SciTech Connect

    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.

  16. Hybrid Solar Lighting Provides Energy Savings and Reduces Waste Heat

    SciTech Connect

    Lapsa, Melissa Voss; Maxey, L Curt; Earl, Dennis Duncan; Beshears, David L; Ward, Christina D; Parks, James Edgar

    2006-01-01

    ABSTRACT Artificial lighting is the largest component of electricity use in commercial U.S. buildings. Hybrid solar lighting (HSL) provides an exciting new means of reducing energy consumption while also delivering significant ancillary benefits associated with natural lighting in buildings. As more than half of all federal facilities are in the Sunbelt region (defined as having an average direct solar radiation of greater than 4 kWh/m2/day) and as more than half of all square footage available in federal buildings is also in the Sunbelt, HSL is an excellent technology fit for federal facilities. The HSL technology uses a rooftop, 4-ft-wide dish and secondary mirror that track the sun throughout the day (Fig. 1). The collector system focuses the sunlight onto 127 optical fibers. The fibers serve as flexible light pipes and are connected to hybrid light fixtures that have special diffusion rods that spread out the light in all directions. One collector powers about eight hybrid light fixtures-which can illuminate about 1,000 square feet. The system tracks at 0.1 accuracy, required by the two-mirror geometry to keep the focused beam on the fiber bundle. When sunlight is plentiful, the optical fibers in the luminaires provide all or most of the light needed in an area. During times of little or no sunlight, a sensor controls the intensity of the artificial lamps to maintain a desired illumination level. Unlike conventional electric lamps, the natural light produces little to no waste heat and is cool to the touch. This is because the system's solar collector removes the infrared light-the part of the spectrum that generates a lot of the heat in conventional bulbs-from the sunlight.

  17. SOLERAS - Solar Energy Water Desalination Project: Martin Marietta Corporation. Pilot plant final report

    SciTech Connect

    Not Available

    1985-01-01

    This report documents the technical effort of Martin Marietta Corporation, in association with Black and Veatch International as a subcontractor for the trade studies performed to design a Solar Desalination Pilot Plant is documented. The final system configuration utilizes existing technology to convert seawater to potable water. This technology includes the collection of solar energy, storage of this energy in a fluid heat transfer medium, generation of steam and electricity from this stored energy, utilization of low pressure turbine exhaust steam as a source of energy to distill salt water, and also generation of potable water through the use of a reverse osmosis unit.

  18. Solar Easements | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Residential Savings Category Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Photovoltaics Program Info Sector Name State State Idaho Program Type Solar/Wind Access Policy Summary Similar to laws in other states, Idaho's solar easement provision does not create an automatic right to sunlight. Rather, the law allows parties to enter into solar easement contracts voluntarily for the purpose of ensuring adequate exposure of a solar-energy system. The easement is transferred with the

  19. Sacramento Ordinance to Waive Fees for Solar Hot Water

    Energy.gov [DOE]

    An ordinance suspending for the calendar years 2007-2009 all fees related to installations of solar water heaters on existing residences.

  20. Water Impacts of High Solar PV Electricity Penetration

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Water Impacts of High Solar PV Electricity Penetration Jordan Macknick and Stuart Cohen National Renewable Energy Laboratory (NREL) Technical Report NRELTP-6A20-63011 September...

  1. Solar Hot Water Creates Savings for Homeless Shelters

    Energy.gov [DOE]

    The state of Arizona and the House of Refuge Sunnyslope are partnering to install solar hot water systems at five Phoenix-area housing sites for homeless men.

  2. LaSolar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Place: Argentina Sector: Solar Product: Manufactures and distributes solar passive water heating systems and PV systems in Spain, South America and Israel References:...

  3. Solar High Temperature Water-Splitting Cycle with Quantum Boost

    SciTech Connect

    Taylor, Robin; Davenport, Roger; Talbot, Jan; Herz, Richard; Genders, David; Symons, Peter; Brown, Lloyd

    2014-04-25

    A sulfur family chemical cycle having ammonia as the working fluid and reagent was developed as a cost-effective and efficient hydrogen production technology based on a solar thermochemical water-splitting cycle. The sulfur ammonia (SA) cycle is a renewable and sustainable process that is unique in that it is an all-fluid cycle (i.e., with no solids handling). It uses a moderate temperature solar plant with the solar receiver operating at 800°C. All electricity needed is generated internally from recovered heat. The plant would operate continuously with low cost storage and it is a good potential solar thermochemical hydrogen production cycle for reaching the DOE cost goals. Two approaches were considered for the hydrogen production step of the SA cycle: (1) photocatalytic, and (2) electrolytic oxidation of ammonium sulfite to ammonium sulfate in aqueous solutions. Also, two sub-cycles were evaluated for the oxygen evolution side of the SA cycle: (1) zinc sulfate/zinc oxide, and (2) potassium sulfate/potassium pyrosulfate. The laboratory testing and optimization of all the process steps for each version of the SA cycle were proven in the laboratory or have been fully demonstrated by others, but further optimization is still possible and needed. The solar configuration evolved to a 50 MW(thermal) central receiver system with a North heliostat field, a cavity receiver, and NaCl molten salt storage to allow continuous operation. The H2A economic model was used to optimize and trade-off SA cycle configurations. Parametric studies of chemical plant performance have indicated process efficiencies of ~20%. Although the current process efficiency is technically acceptable, an increased efficiency is needed if the DOE cost targets are to be reached. There are two interrelated areas in which there is the potential for significant efficiency improvements: electrolysis cell voltage and excessive water vaporization. Methods to significantly reduce water evaporation are

  4. Sustainable Energy Resources for Consumers (SERC) - Solar Hot Water |

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Department of Energy solar_thermal_transcript.pdf (148.79 KB) More Documents & Publications Sustainable Energy Resources for Consumers (SERC) - Geothermal/Ground-Source Heat Pumps SERC Photovoltaics for Residential Buildings Webinar Transcript Recording of SERC Monitoring Technologies - Solar Photovoltaics

  5. Flare heating and ionization of the low solar chromosphere. II. Observations of five solar flares

    SciTech Connect

    Metcalf, T.R.; Canfield, R.C.; Saba, J.L.R. Hawaii Univ., Honolulu Lockheed Research Laboratories, Palo Alto, CA )

    1990-12-01

    Two neutral Mg spectral lines formed in the temperature-minimum region and the low chromosphere, at 4571 and 5173 A, are used to quantify the changes in the atmospheric structure as a function of time during five solar flares. Eight proposed flare heating and ionization mechanisms and predictions of the effects of each on the temperature minimum region are discussed. Two Mg spectral observations made at the National Solar Observatory (Sacramento Peak), along with observations of hard and soft X-rays from the SMM and GOES satellites, are compared to the predictions of the eight proposed mechanisms. The initial effects in all five flares are consistent with backwarming by enhanced Balmer- and Paschen-continuum radiation originating in the upper chromosphere. Extended heating observed in two of the flares is most likely due to UV irradiation. In all cases heating by the dissipation of nonreversed electric currents, collisions with an electron or proton beam, irradiation by soft X-rays, and dissipation of Alfven waves are eliminated. 61 refs.

  6. Refrigerant charge management in a heat pump water heater

    DOEpatents

    Chen, Jie; Hampton, Justin W.

    2016-07-05

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

  7. HVAC, Water Heating, and Appliances Overview - 2015 BTO Peer Review |

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Department of Energy Appliances Overview - 2015 BTO Peer Review HVAC, Water Heating, and Appliances Overview - 2015 BTO Peer Review Presenter: Tony Bouza, U.S. Department of Energy View the Presentation HVAC, Water Heating, and Appliances Overview - 2015 BTO Peer Review (801.59 KB) More Documents & Publications HVAC, Water Heater and Appliance R&D - 2014 BTO Peer Review HVAC, Water Heating, and Appliance Subprogram Overview - 2016 BTO Peer Review

  8. 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

  9. Heat pump water heaters: A technology assessment and market survey

    SciTech Connect

    Nisson, N.; Shepard, M.

    1994-12-31

    Heat pump water heaters (HPWHs) are two to four times as efficient as electric resistance water heaters and provide space cooling as well as water heating. They also cost considerably more, consume more space, and may require more maintenance. Their low operating costs make them an attractive option in hotels, apartment buildings, restaurants, laundries, and other settings where there are simultaneous demands for space cooling and water heating. In such settings they often pay back in less than two years relative to resistance water heating and can be more economical than gas water heating. In houses, the economics are highly variable, with paybacks ranging from less than two years to more than twenty years, depending on climate, water use patterns, and other factors. HPWHs can be a peak shaving option for utilities whose daily peak coincides with the residential morning water heating peak. Residential units draw 500 to 800 watts, compared to 4,500 watts or more for resistance water heaters. Heat pump water heaters hold a tiny share of the water heating market, but their profile is rising, due in part to a controversial water heating standard proposed in the United States. Six North American manufacturers currently produce nearly 50 models for residential and commercial applications, and several new players will enter the market in 1995. Scant field data exist on the performance of currently available models, but more information will become available over the coming year from several utility demonstration, monitoring, and incentive programs.

  10. Heat Pump Water Heater Basics | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

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

  11. Solar heating and cooling system installed at RKL Controls Company, Lumberton, New Jersey. Final report

    SciTech Connect

    1981-03-01

    Solar heating and cooling of a 40,000 square foot manufacturing building, sales offices and the solar computer control center/display room are described. Information on system description, test data, major problems and resolutions, performance, operation and maintenance manual, manufacturer's literature and as-built drawings are provided also. The solar system is composed of 6000 square feet of Sunworks double glazed flat plate collectors, external above ground storage subsystem, controls, ARKLA absorption chiller, heat recovery and a cooling tower.

  12. Build-it-yourself solar water heater: reduce electric use

    SciTech Connect

    Not Available

    1982-01-01

    Drawings and instructions for a simple breadbox-style solar water heater are presented. This booklet is a step-by-step guide to building a solar water heater for approximately 15 percent of the cost of most commercially-installed systems. This system does not provide as much energy as the commercially available systems. (MHR)

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

    Energy.gov [DOE]

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

  14. Homebuilder's Guide to Going Solar

    DOE R&D Accomplishments

    2008-12-01

    This 8-page brochure describes the steps a builder would take to install solar electricity (photovoltaics or PV), solar water heating, or how to build a home solar ready.

  15. Desalting system utilizing solar energy

    SciTech Connect

    Iida, T.

    1985-06-25

    A heat-transfer medium is heated by a solar heat collector and then adiabatically compressed. The heat-transfer medium thus compressed exchanges heat with the seawater to heat it, and is then adiabatically expanded with the heated seawater being evaporated and the steam thus produced, upon heat exchange with the seawater, changed into fresh water.

  16. Near-term viability of solar heat applications for the federal sector

    SciTech Connect

    Williams, T.A.

    1991-12-01

    Solar thermal technologies are capable of providing heat across a wide range of temperatures, making them potentially attractive for meeting energy requirements for industrial process heat applications and institutional heating. The energy savings that could be realized by solar thermal heat are quite large, potentially several quads annually. Although technologies for delivering heat at temperatures above 100{degrees}C currently exit within industry, only a fairly small number of commercial systems have been installed to date. The objective of this paper is to investigate and discuss the prospects for near-term solar heat sales to federal facilities as a mechanism for providing an early market niche to the aid the widespread development and implementation of the technology. The specific technical focus is on mid-temperature (100{degrees}--350{degrees}C) heat demands that could be met with parabolic trough systems. Federal facilities have several relative to private industry that may make them attractive for solar heat applications relative to other sectors. Key features are specific policy mandates for conserving energy, a long-term planning horizon with well-defined decision criteria, and prescribed economic return criteria for conservation and solar investments that are generally less stringent than the investment criteria used by private industry. Federal facilities also have specific difficulties in the sale of solar heat technologies and strategies to mitigate these difficulties will be important. For the baseline scenario developed in this paper, the solar heat application was economically competitive with heat provided by natural gas. The system levelized energy cost was $5.9/MBtu for the solar heat case, compared to $6.8/MBtu for the life-cycle fuel cost of a natural gas case. A third-party ownership would also be attractive to federal users, since it would guarantee energy savings and would not need initial federal funds. 11 refs., 2 figs., 3 tabs.

  17. Condensing Heating and Water Heating Equipment Workshop Location: Washington Gas Light Appliance Training Facility

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Condensing Heating and Water Heating Equipment Workshop Location: Washington Gas Light Appliance Training Facility 6801 Industrial Road Springfield, VA Date: October 9, 2014 Time: 10:00 am - 12:30 pm EDT Purpose: To convene representatives from stakeholder organizations in order to enhance their understanding of the characteristics of condensing natural gas heating and water heating equipment that contribute to the unique installation requirements and challenges of this equipment compared to

  18. Thermal overinsulation and the behavior of hot water heating systems

    SciTech Connect

    Casier, Y.

    1982-01-01

    Supported by thermodynamic calculations and field experience G.D.F. disproved the theory that because of their high warm-up/cooldown inertia, hot-water central heating systems are inefficient for insulated dwellings that have low thermal losses, causing overheating in certain situations. With the proper choice of thermostat, water temperature, and piping design, a heating system that uses water as the heat carrier can be responsive to the needs of a tightly insulated residence.

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

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

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

  20. Water Heating R&D | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    R&D Water Heating R&D Lead Performer: Oak Ridge National Laboratory (ORNL) - Oak Ridge, TN FY16 DOE Funding: $1,684,000 Project Term: Ongoing Funding Type: Direct Lab Funding PROJECT OBJECTIVE Water heating accounts for 13% of primary energy consumption in residential buildings and 4% in commercial buildings. The commercial building energy savings opportunity is larger and more easily accessible than it would appear because water heating energy use is concentrated in only a few building

  1. Estimating the Cost and Energy Efficiency of a Solar Water Heater...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Estimating the Cost and Energy Efficiency of a Solar Water Heater Estimating the Cost and Energy Efficiency of a Solar Water Heater March 2, 2015 - 3:09pm Addthis Solar water...

  2. Passive Solar Home Design | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    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 water and a

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

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

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

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

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

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

  5. Building America Webinar: Central Multifamily Water Heating Systems

    Energy.gov [DOE]

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

  6. natural gas+ condensing flue gas heat recovery+ water creation...

    OpenEI (Open Energy Information) [EERE & EIA]

    natural gas+ condensing flue gas heat recovery+ water creation+ CO2 reduction+ cool exhaust gases+ Energy efficiency+ commercial building energy efficiency+ industrial energy...

  7. CO2 Heat Pump Water Heater | Department of Energy

    Energy.gov [DOE] (indexed site)

    other refrigerants), CO2 also has greater potential for use in residentialcommercial demand response units, as well as for high-temperature commercial water heating applications. ...

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

    SciTech Connect

    Hudon, K.

    2012-05-01

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

  9. Solar Equipment Certification | Department of Energy

    Energy.gov [DOE] (indexed site)

    Certification Summary Minnesota law requires that all active solar space-heating and water-heating systems, sold, offered for sale, or installed on residential and commercial...

  10. Development of a Long-Life-Cycle, Highly Water-Resistant Solar...

    Office of Scientific and Technical Information (OSTI)

    Highly Water-Resistant Solar Reflective Retrofit Roof Coating Citation Details In-Document Search Title: Development of a Long-Life-Cycle, Highly Water-Resistant Solar ...

  11. Estimating the Cost and Energy Efficiency of a Solar Water Heater...

    Energy.gov [DOE] (indexed site)

    Solar water heaters are more efficient the gas or electric heaters. | Chart credit ENERGY STAR Solar water heaters are more efficient the gas or electric heaters. | Chart credit...

  12. SOLERAS - Solar Energy Water Desalination Project: Boeing Engineering and Construction. System design final report

    SciTech Connect

    Not Available

    1986-01-01

    The system design for a future commercial solar energy brackish water desalination plant is described. Key features of the plant are discussed along with its configuration selection rationale, design objectives, operation, and performance. The water treatment technology used in the plant is ion exchange pretreatment and single stage reverse osmosis desalination utilizing high-flux membranes. Electrical power needed for plant operation is produced by a solar energy system, which is based on the Brayton cycle having air as the working fluid. Primary solar system components are: heliostat field, central cavity-tube receiver, receiver support tower, thermal energy storage, and a commercial gas turbine generator set. The thermal energy storage subsystem is of the sensible heat brick type and provides a capability for continuous day/night power generation during most weather conditions. This system design was selected in a study of various system alternatives and their life cycle product water costs for a representative site in western Texas.

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

    SciTech Connect

    none,

    2012-08-01

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

  14. Development of a gas backup heater for solar domestic hot-water systems. Final report, April 1978-April 1980

    SciTech Connect

    Morrison, D.J.; Grunes, H.E.; de Winter, F.; Armstrong, P.R.

    1980-06-01

    A comprehensive program was undertaken to develop a unique gas fired backup for solar domestic hot water systems. Detailed computer design tools were written. A series of heat transfer experiments were performed to characterize the performance of individual components. A full scale engineering prototype, including the solar preheat tank and solar heat exchanger, was designed, fabricated and subjected to limited testing. Firing efficiency for the backup system was found to be 81.4% at a firing rate of 50,000 Btu/h. Long term standby losses should be negligible.

  15. Survey and evaluation of available thermal insulation materials for use on solar heating and cooling systems

    SciTech Connect

    Not Available

    1980-03-01

    This is the final report of a survey and evaluation of insulation materials for use with components of solar heating and cooling systems. The survey was performed by mailing questionnaires to manufacturers of insulation materials and by conducting an extensive literature search to obtain data on relevant properties of various types of insulation materials. The study evaluated insulation materials for active and passive solar heating and cooling systems and for multifunction applications. Primary and secondary considerations for selecting insulation materials for various components of solar heating and cooling systems are presented.

  16. Florida Sunshine -- Natural Source for Heating Water (Revised)

    SciTech Connect

    Not Available

    2004-06-01

    DOE's State Energy Program published this case study in conjunction with the Florida Energy Office about Florida's experience with establishing the first utility-run solar hot water program in the country.

  17. Water Impacts of High Solar PV Electricity Penetration

    SciTech Connect

    Macknick, Jordan; Cohen, Stuart

    2015-09-01

    This analysis provides a detailed national and regional description of the water-related impacts and constraints of high solar electricity penetration scenarios in the U.S. in 2030 and 2050. A modified version of the Regional Energy Deployment System (ReEDS) model that incorporates water resource availability and costs as a constraint in each of its 134 Balancing Area (BA) regions was utilized to explore national and regional differences in water use impacts and solar deployment locations under different solar energy cost and water availability scenarios (Macknick et al. 2015). Water resource availability and cost data are from recently completed research at Sandia National Laboratories (Tidwell et al. 2013a). Scenarios analyzed include two business-as-usual solar energy cost cases, one with and one without considering available water resources, and four solar energy cost cases that meet the SunShot cost goals (i.e., $1/watt for utility-scale PV systems), with varying levels of water availability restrictions. This analysis provides insight into the role solar energy technologies have in the broader electricity sector under scenarios of water constraints.

  18. Research and Development Roadmap for Water Heating Technologies

    SciTech Connect

    Goetzler, William; Gagne, Claire; Baxter, Van D; Lutz, James; Merrigan, Tim; Katipamula, Srinivas

    2011-10-01

    Although water heating is an important energy end-use in residential and commercial buildings, efficiency improvements in recent years have been relatively modest. However, significant advancements related to higher efficiency equipment, as well as improved distribution systems, are now viable. DOE support for water heating research, development and demonstration (RD&D) could provide the impetus for commercialization of these advancements.

  19. Laboratory Performance Evaluation of Residential Integrated Heat Pump Water Heaters

    SciTech Connect

    Sparn, B.; Hudon, K.; Christensen, D.

    2011-09-01

    This report discusses how a significant opportunity for energy savings is domestic hot water heating, where an emerging technology has recently arrived in the U.S. market: the residential integrated heat pump water heater. A laboratory evaluation is presented of the five integrated HPWHs available in the U.S. today.

  20. Heat exchanger and water tank arrangement for passive cooling system

    DOEpatents

    Gillett, James E. (Greensburg, PA); Johnson, F. Thomas (Baldwin Boro, PA); Orr, Richard S. (Pittsburgh, PA); Schulz, Terry L. (Murrysville Boro, PA)

    1993-01-01

    A water storage tank in the coolant water loop of a nuclear reactor contains a tubular heat exchanger. The heat exchanger has tubesheets mounted to the tank connections so that the tubesheets and tubes may be readily inspected and repaired. Preferably, the tubes extend from the tubesheets on a square pitch and then on a rectangular pitch therebetween. Also, the heat exchanger is supported by a frame so that the tank wall is not required to support all of its weight.

  1. Outdoor Outfitter Gets Greener With Solar Water Heater

    Energy.gov [DOE]

    Using Recovery Act funding, L.L. Bean, the popular outdoor apparel company, recently installed a 180-tube solar hot water collector array on the roof of their flagship store in Freeport, Maine. Find out some how much energy and money they're saving thanks to the new solar installation.

  2. Solar Easements & Rights Laws | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Industrial Local Government Nonprofit Residential Schools State Government Federal Government Agricultural Institutional Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Thermal Process Heat Solar Photovoltaics Program Info Sector Name State State Washington Program Type Solar/Wind Access Policy Summary Washington's solar easement laws are similar to those in many other states. The law does not create an automatic right to sunlight. Rather, the law

  3. Radiant Heating | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Radiant heating systems supply heat directly to the floor or to ... of heat directly from the hot surface to the people and ... wood-fired boilers, solar water heaters, or a combination ...

  4. Waste heat from kitchen cuts hot water electricity 23%

    SciTech Connect

    Barber, J.

    1984-05-21

    Heat recovered from the Hamburger Hamlet's kitchen in Bethesada, Maryland and used to pre-heat the million gallons of hot water used annually reduced hot water costs 23% and paid off the investment in 1.5 years. Potomac Electric initiated the installation of an air-to-water heat pump in the restaurant kitchen above the dishwasher at a cost of about $5300, with the restaurant obliged to reimburse the utility if performance was satisfactory. Outside water recirculates through storage tanks and the ceiling heat pump until it reaches the required 140/sup 0/F. The amount of electricity needed to bring the preheated water to that temperature was $3770 lower after the installation. Cooled air exhausted from the heat pump circulates throughout the kitchen.

  5. Thermal performance testing and mathematically modeling of integral collector storage solar hot water systems. Final report

    SciTech Connect

    Thomas, W.C.

    1985-02-01

    An investigation was carried out to evaluate a possible alternative test method for integral collector storage solar hot water systems. The new test method is an alternative to the established consensus standard method which requires that integral collector storage systems be tested using a solar irradiance simulator. The concept behind the alternative method is to characterize the thermal performance of the solar collection elements in the integral system using standard test methods for conventional solar collectors. After measuring the efficiency and incident angle response, the integral collector storage hot water system would be tested using an electrical heat source to simulate the absorbed solar energy. The research included both experimental and analytical investigations on the collector elements and on the complete system. All-day tests were performed on two commercial integral collector storage solar domestic hot water systems. Tests were performed under a variety of ambient conditions and irradiance levels. An analytical model was developed to predict the thermal performance of one of the systems. Predicted performance was compared with experimental results. Experimental and analytical results indicated that thermal stratification has a minimal effect on the daily collection efficiency of integral storage collectors. While the investigation showed that it is technically feasible to implement the new test method, further recommendations on implementation are contigent on validation of the method in a system test facility.

  6. Solar Sales Tax Exemption

    Energy.gov [DOE]

    For both residential and non-residential systems, the exemption applies to solar-energy systems that utilize solar radiation to produce energy designed to provide heating, cooling, hot water and/or...

  7. Solar Contractor Licensing

    Energy.gov [DOE]

    Until 1994, Florida offered limited specialty licenses for residential solar hot water and pool heating, as well a general solar contractor's license. These specialty licenses have not been issued...

  8. Solar Construction Permitting Standards

    Energy.gov [DOE]

    Owners of solar photovoltaic (PV) systems and solar water heating systems in Colorado are required to obtain a building permit before their systems may be installed. Permits are handled at the l...

  9. City Water Light and Power- Solar Rewards Program

    Energy.gov [DOE]

    City Water, Light and Power  (CWLP) is offering residential and commercial customers a $500 per kilowatt (kW) rebate for installing solar photovoltaic (PV) systems with a maximum rebate of up to $2...

  10. Pasadena Water and Power- Solar Power Installation Rebate

    Energy.gov [DOE]

    Pasadena Water & Power (PWP) offers its electric customers a rebate for photovoltaic (PV) installations, with a goal of helping to fund the installation of 14 megawatts (MW) of solar power by...

  11. Characterization of selected application of biomass energy technologies and a solar district heating and cooling system

    SciTech Connect

    D'Alessio, Dr., Gregory J.; Blaunstein, Robert P.

    1980-09-01

    The following systems are discussed: energy self-sufficient farms, wood gasification, energy from high-yield silviculture farms, and solar district heating and cooling. System descriptions and environmental data are included for each one. (MHR)

  12. Buildings","All Buildings with Water Heating","Water-Heating Energy Sources Used

    Energy Information Administration (EIA) (indexed site)

    5. Water-Heating Energy Sources, Number of Buildings, 1999" ,"Number of Buildings (thousand)" ,"All Buildings","All Buildings with Water Heating","Water-Heating Energy Sources Used (more than one may apply)" ,,,"Electricity","Natural Gas","Fuel Oil","District Heat","Propane" "All Buildings ................",4657,3239,1546,1520,110,62,130 "Building Floorspace" "(Square

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

    Energy Saver

    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, ...

  14. Research & Development Needs for Building-Integrated Solar Technologie...

    Energy.gov [DOE] (indexed site)

    and cooling, water heating, hybrid photovoltaic-thermal systems (PVT), active solar ... Home Technologies: Solar Thermal & Photovoltaic Systems; Volume 6 Building America ...

  15. Procuring and Implementing Solar Projects on Public Buildings...

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Procuring and Implementing Solar Projects on Public Buildings: How to Avoid Common Pitfalls This webinar covered good practices for photovoltaic and solar water heating request for ...

  16. Cel f Solar Systems Ltd | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Kemsing, Kent, United Kingdom Zip: TN15 6PL Sector: Solar Product: Installer and maintenance service provider for household PV and solar water heating systems. References:...

  17. Baoding Solar Thermal Equipment Company | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Equipment Company Place: Baoding, Hebei Province, China Sector: Solar Product: Solar water heating system manufacturer. Coordinates: 38.855011, 115.480217 Show Map Loading...

  18. Solargenix Energy LLC formerly Duke Solar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    develops projects using a STEGS parabolic trough system, and also produces solar passive water heating systems. References: Solargenix Energy LLC (formerly Duke Solar)1 This...

  19. Solar

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas ...

  20. Tips: Water Heating | Department of Energy

    Energy.gov [DOE] (indexed site)

    Keep your energy bills out of hot water. Insulate your water heater to save energy and money, or choose an on-demand hot water heater to save even more. Keep your energy bills out...

  1. Performance of a solar heating system on the LSU field house determined from test data

    SciTech Connect

    Maples, D.; Whitehouse, G.D.

    1981-01-01

    Performance data was collected and analyzed for a solar heating system installed on the Field House at Louisiana State University. The solar system performed as expected for periods that it operated. Problems encountered are discussed. Efficiency of flat-plate collectors used was determined. 2 refs.

  2. Water Heating Standing Technical Committee Presentation | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Energy Standing Technical Committee Presentation Water Heating Standing Technical Committee Presentation This presentation outlines the goals of the Water Heating Standing Technical Committee, as presented at the Building America Spring 2012 Stakeholder meeting on February 29, 2012, in Austin, Texas. hot_water_stc.pdf (613.42 KB) More Documents & Publications Standing Technical Committee Working Sessions Building America Expert Meeting: Exploring the Disconnect Between Rated and Field

  3. Glendale Water and Power- Solar Solutions Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Solar Solutions program provides all customer groups with an incentive to install photovoltaic (PV) systems on their homes and buildings. Rebate levels will decrease over time on an annual...

  4. High Efficiency Generation of Hydrogen Fuels Using Solar Thermochemical Splitting of Water

    SciTech Connect

    Heske, Clemens; Moujaes, Samir; Weimer, Alan; Wong, Bunsen; Siegal, Nathan; McFarland, Eric; Miller, Eric; Lewis, Michele; Bingham, Carl; Roth, Kurth; Sabacky, Bruce; Steinfeld, Aldo

    2011-09-29

    The objective of this work is to identify economically feasible concepts for the production of hydrogen from water using solar energy. The ultimate project objective was to select one or more competitive concepts for pilot-scale demonstration using concentrated solar energy. Results of pilot scale plant performance would be used as foundation for seeking public and private resources for full-scale plant development and testing. Economical success in this venture would afford the public with a renewable and limitless source of energy carrier for use in electric power load-leveling and as a carbon-free transportation fuel. The Solar Hydrogen Generation Research (SHGR) project embraces technologies relevant to hydrogen research under the Office of Hydrogen Fuel Cells and Infrastructure Technology (HFCIT) as well as concentrated solar power under the Office of Solar Energy Technologies (SET). Although the photoelectrochemical work is aligned with HFCIT, some of the technologies in this effort are also consistent with the skills and technologies found in concentrated solar power and photovoltaic technology under the Office of Solar Energy Technologies (SET). Hydrogen production by thermo-chemical water-splitting is a chemical process that accomplishes the decomposition of water into hydrogen and oxygen using only heat or a combination of heat and electrolysis instead of pure electrolysis and meets the goals for hydrogen production using only water and renewable solar energy as feed-stocks. Photoelectrochemical hydrogen production also meets these goals by implementing photo-electrolysis at the surface of a semiconductor in contact with an electrolyte with bias provided by a photovoltaic source. Here, water splitting is a photo-electrolytic process in which hydrogen is produced using only solar photons and water as feed-stocks. The thermochemical hydrogen task engendered formal collaborations among two universities, three national laboratories and two private sector

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

    SciTech Connect

    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.

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

    SciTech Connect

    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.

  7. Solar Energy to Help Heat Major Commercial Facility

    U.S. Department of Energy (DOE) - all webpages (Extended Search)

    Renewable Energy » Solar Energy Technology Basics Solar Energy Technology Basics August 16, 2013 - 4:37pm Addthis Did you know that the amount of sunlight that strikes the earth's surface in an hour and a half is enough to handle the entire world's energy consumption for a full year? Solar energy has amazing potential to power our daily lives thanks to constantly-improving technologies. Solar energy systems come in all shapes and sizes. Residential systems are found on rooftops across the

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

    Office of Energy Efficiency and Renewable Energy (EERE) (indexed site)

    Name State Administrator North Carolina Solar Center State North Carolina Program Type Property Tax Incentive Rebate Amount No more than conventional equipment Summary Active...

  9. Technical evaluation of a solar heating system having conventional hydronic solar collectors and a radiant panel slab. Final report

    SciTech Connect

    Starr, R.J.

    1984-04-01

    A simple innovative solar heating design (Solar Option One) using conventional hydronic solar collectors and a radiant panel slab was constructed. An objective of hybrid solar design is to combine the relative advantages of active and passive design approaches while minimizing their respective disadvantages. A test house using the Solar Option One heating system was experimentally monitored to determine its energy based performance during the 1982-83 heating season. The test residence is located in Lyndonville, Vermont, an area which has a characteristically cold and cloudy climate. The two story residence has a floor area of about 1400 square feet and is constructed on a 720 square foot 5.5 inch thick floor slab. A 24 inch packed gravel bed is located beneath the slab and the slab-gravel bed is insulated by two inches of polystyrene insulation. The test building is of frame construction and uses insulation levels which have become commonplace throughout the country. The structure would not fall into the superinsulated category but was tightly constructed so as to have a low infiltration level. The building is sun-tempered in that windows were concentrated somewhat on the South side and all but avoided on the North. A solar greenhouse on the South side of the building was closed off from the structure permanently throughout the testing so as to better observe the solar heating invention without confounding variables. The monitoring equipment generated an internal gain of about 17,000 BTUs per day, roughly the equivalent of occupancy by two persons. A full description of the experimental testing program is given. System efficiency and performance are reported.

  10. Midtemperature Solar Systems Test Facility predictions for thermal performance of the Suntec solar collector with heat-formed glass reflector surface

    SciTech Connect

    Harrison, T.D.

    1980-11-01

    Thermal performance predictions are presented for the Suntec solar collector, with heat-formed glass reflector surface, for three output temperatures at five cities in the United States.

  11. 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

  12. Homebuilder's Guide to Going Solar (Brochure)

    SciTech Connect

    Not Available

    2008-12-01

    This 8-page brochure describes the steps a builder would take to install solar electricity (photovoltaics or PV), solar water heating, or how to build a home solar ready.

  13. ZEN Eaga Solar Ltd | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    upon Tyne, United Kingdom Zip: NE2 1DB Sector: Solar Product: Distributes solar thermal water heating and PV products. References: ZEN Eaga Solar Ltd1 This article is a stub....

  14. SolarRoofs com | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    95608 Sector: Solar Product: California-based manufacturer of the patented Skyline solar water heating systems. References: SolarRoofs.com1 This article is a stub. You can help...

  15. Transpired Solar Collector at NREL's Waste Handling Facility Uses Solar Energy to Heat Ventilation Air (Fact Sheet)

    SciTech Connect

    Not Available

    2010-09-01

    The transpired solar collector was installed on NREL's Waste handling Facility (WHF) in 1990 to preheat ventilation air. The electrically heated WHF was an ideal candidate for the this technology - requiring a ventilation rate of 3,000 cubic feet per meter to maintain safe indoor conditions.

  16. Water recovery using waste heat from coal fired power plants.

    SciTech Connect

    Webb, Stephen W.; Morrow, Charles W.; Altman, Susan Jeanne; Dwyer, Brian P.

    2011-01-01

    The potential to treat non-traditional water sources using power plant waste heat in conjunction with membrane distillation is assessed. Researchers and power plant designers continue to search for ways to use that waste heat from Rankine cycle power plants to recover water thereby reducing water net water consumption. Unfortunately, waste heat from a power plant is of poor quality. Membrane distillation (MD) systems may be a technology that can use the low temperature waste heat (<100 F) to treat water. By their nature, they operate at low temperature and usually low pressure. This study investigates the use of MD to recover water from typical power plants. It looks at recovery from three heat producing locations (boiler blow down, steam diverted from bleed streams, and the cooling water system) within a power plant, providing process sketches, heat and material balances and equipment sizing for recovery schemes using MD for each of these locations. It also provides insight into life cycle cost tradeoffs between power production and incremental capital costs.

  17. Hybrid Photovoltaic/Thermal Systems with a Solar-Assisted Heat Pump

    SciTech Connect

    Kush, E. A.

    1980-01-01

    An outline of possibilities for effective use of PV/T collectors with a Solar Assisted Heat Pump is given. A quantitative analysis of the performance and cost of the various configurations as a function of regional climates, using up-to-date results from solar heat pump and PV/T collector studies, will be required for more definitive assessment; and it is recommended that these be undertaken in the PV/T Program. Particular attention should be paid to development of high performance PV/T collectors, matching of heat pump electrical system to PV array and power conditioning characteristics, and optimization of storage options for cost effectiveness and utility impact.

  18. Sulfur Based Thermochemical Heat Storage for Baseload Concentrated Solar Power Generation

    SciTech Connect

    wong, bunsen

    2014-11-20

    This project investigates the engineering and economic feasibility of supplying baseload power using a concentrating solar power (CSP) plant integrated with sulfur based thermochemical heat storage. The technology stores high temperature solar heat in the chemical bonds of elemental sulfur. Energy is recovered as high temperature heat upon sulfur combustion. Extensive developmental and design work associated with sulfur dioxide (SO2) disproportionation and sulfuric acid (H2SO4) decomposition chemical reactions used in this technology had been carried out in the two completed phases of this project. The feasibility and economics of the proposed concept was demonstrated and determined.

  19. The Development of a Roof Integrated Solar Hot Water System

    SciTech Connect

    Menicucci, David F.; Moss, Timothy A.; Palomino, G. Ernest

    2006-09-01

    The Salt River Project (SRP), in conjunction with Sandia National Laboratories (SNL) and Energy Laboratories, Inc. (ELI), collaborated to develop, test, and evaluate an advanced solar water-heating product for new homes. SRP and SNL collaborated under a Department of Energy Cooperative Research and Development Agreement (CRADA), with ELI as SRP's industry partner. The project has resulted in the design and development of the Roof Integrated Thermal Siphon (RITH) system, an innovative product that features complete roof integration, a storage tank in the back of the collector and below the roofline, easy installation by homebuilders, and a low installed cost. SRP's market research guided the design, and the laboratory tests conducted at SNL provided information used to refine the design of field test units and indicated that the RITH concept is viable. ELI provided design and construction expertise and is currently configured to manufacture the units. This final report for the project provides all of the pertinent and available materials connected to the project including market research studies, the design features and development of the system, and the testing and evaluation conducted at SNL and at a model home test site in Phoenix, Arizona.

  20. Performance analysis of a latent heat storage system with phase change material for new designed solar collectors in greenhouse heating

    SciTech Connect

    Benli, Hueseyin; Durmus, Aydin

    2009-12-15

    The continuous increase in the level of greenhouse gas emissions and the rise in fuel prices are the main driving forces behind the efforts for more effectively utilize various sources of renewable energy. In many parts of the world, direct solar radiation is considered to be one of the most prospective sources of energy. In this study, the thermal performance of a phase change thermal storage unit is analyzed and discussed. The storage unit is a component of ten pieced solar air collectors heating system being developed for space heating of a greenhouse and charging of PCM. CaCl{sub 2}6H{sub 2}O was used as PCM in thermal energy storage with a melting temperature of 29 C. Hot air delivered by ten pieced solar air collector is passed through the PCM to charge the storage unit. The stored heat is utilized to heat ambient air before being admitted to a greenhouse. This study is based on experimental results of the PCM employed to analyze the transient thermal behavior of the storage unit during the charge and discharge periods. The proposed size of collectors integrated PCM provided about 18-23% of total daily thermal energy requirements of the greenhouse for 3-4 h, in comparison with the conventional heating device. (author)