National Library of Energy BETA

Sample records for thermal solar photovoltaics

  1. High-Performance Home Technologies: Solar Thermal & Photovoltaic...

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

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

  2. High-Performance Home Technologies: Solar Thermal & Photovoltaic...

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

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

  3. New proposal for photovoltaic-thermal solar energy utilization method

    SciTech Connect (OSTI)

    Takashima, Takumi; Tanaka, Tadayoshi; Doi, Takuya ); Kamoshida, Junji ); Tani, Tatsuo ); Horigome, Takashi )

    1994-03-01

    One of the most effective methods of utilizing solar energy is to use the sunlight and solar thermal energy such as a photovoltaic-thermal panel (PV/T panel) simultaneously. From such a viewpoint, systems using various kinds of PV panels were constructed in the world. In these panels, solar cells are set up at an absorber collecting solar thermal energy. Therefore, temperature of solar cell increases up to the prescribed temperature of thermal energy use, although it is lower than the cell temperature when using only solar cell panel. For maintaining cell conversion efficiency at the standard conditions, it is necessary to keep the cell at lower temperature. In this paper, electric and thermal energy obtained form a PV/T panel is evaluated in terms of energy. BAsed on this evaluation, the method of not to decrease cell conversion efficiency with collecting solar thermal energy was proposed.

  4. High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems

    SciTech Connect (OSTI)

    Baechler, M.; Gilbride, T.; Ruiz, K.; Steward, H.; Love, P.

    2007-06-01

    This document is the sixth volume of the Building America Best Practices Series. It presents information that is useful throughout the United States for enhancing the energy efficiency practices in the specific climate zones that are presented in the first five Best Practices volumes. It provides an introduction to current photovoltaic and solar thermal building practices. Information about window selection and shading is included.

  5. Photovoltaic Solar Projects | Department of Energy

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

    Photovoltaic Solar Projects Photovoltaic Solar Projects Photovoltaic Solar Projects Photovoltaic Solar Projects Photovoltaic Solar Projects Photovoltaic Solar Projects Photovoltaic ...

  6. Photovoltaic solar concentrator

    DOE Patents [OSTI]

    Nielson, Gregory N.; Cruz-Campa, Jose Luis; Okandan, Murat; Resnick, Paul J.; Sanchez, Carlos Anthony; Clews, Peggy J.; Gupta, Vipin P.

    2015-09-08

    A process including forming a photovoltaic solar cell on a substrate, the photovoltaic solar cell comprising an anchor positioned between the photovoltaic solar cell and the substrate to suspend the photovoltaic solar cell from the substrate. A surface of the photovoltaic solar cell opposite the substrate is attached to a receiving substrate. The receiving substrate may be bonded to the photovoltaic solar cell using an adhesive force or a metal connecting member. The photovoltaic solar cell is then detached from the substrate by lifting the receiving substrate having the photovoltaic solar cell attached thereto and severing the anchor connecting the photovoltaic solar cell to the substrate. Depending upon the type of receiving substrate used, the photovoltaic solar cell may be removed from the receiving substrate or remain on the receiving substrate for use in the final product.

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

    SciTech Connect (OSTI)

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

    2007-06-04

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

  8. Photovoltaic-thermal collectors

    DOE Patents [OSTI]

    Cox, III, Charles H. (Carlisle, MA)

    1984-04-24

    A photovoltaic-thermal solar cell including a semiconductor body having antireflective top and bottom surfaces and coated on each said surface with a patterned electrode covering less than 10% of the surface area. A thermal-absorbing surface is spaced apart from the bottom surface of the semiconductor and a heat-exchange fluid is passed between the bottom surface and the heat-absorbing surface.

  9. Thermoelectrics and Photovoltaics - Center for Solar and Thermal Energy

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

    Conversion Thermoelectrics and Photovoltaics Thermoelectrics A significant amount of heat is wasted from industrial processes, home heating and vehicle exhausts that could otherwise be converted to electricity through the use of thermoelectric devices. The interconversion between heat and electricity, through the use of thermoelectrics, is environmentally friendly and highly reliable. With improved efficiency, thermoelectrics could have a significant impact on the energy consumption

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

    SciTech Connect (OSTI)

    Fang, Guiyin; Hu, Hainan; Liu, Xu

    2010-09-15

    An experimental study on operation performance of photovoltaic-thermal solar heat pump air-conditioning system was conducted in this paper. The experimental system of photovoltaic-thermal solar heat pump air-conditioning system was set up. The performance parameters such as the evaporation pressure, the condensation pressure and the coefficient of performance (COP) of heat pump air-conditioning system, the water temperature and receiving heat capacity in water heater, the photovoltaic (PV) module temperature and the photovoltaic efficiency were investigated. The experimental results show that the mean photovoltaic efficiency of photovoltaic-thermal (PV/T) solar heat pump air-conditioning system reaches 10.4%, and can improve 23.8% in comparison with that of the conventional photovoltaic module, the mean COP of heat pump air-conditioning system may attain 2.88 and the water temperature in water heater can increase to 42 C. These results indicate that the photovoltaic-thermal solar heat pump air-conditioning system has better performances and can stably work. (author)

  11. Solar Photovoltaic SPECIFICATION, CHECKLIST...

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

    Ready Home SOLAR PHOTOVOLTAIC SPECIFICATION, CHECKLIST AND GUIDE i Table of Contents About the Renewable Energy Ready Home Specifications Assumptions of the RERH Solar ...

  12. Renewable Energy Ready Home Solar Photovoltaic Specifications...

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

    Renewable Energy Ready Home Solar Photovoltaic Specifications Renewable Energy Ready Home Solar Photovoltaic Specifications Solar Photovoltaic Specification, Checklist and Guide, ...

  13. Hybrid photovoltaic/thermal (PV/T) solar systems simulation with Simulink/Matlab

    SciTech Connect (OSTI)

    da Silva, R.M.; Fernandes, J.L.M.

    2010-12-15

    The purpose of this work consists in thermodynamic modeling of hybrid photovoltaic-thermal (PV/T) solar systems, pursuing a modular strategy approach provided by Simulink/Matlab. PV/T solar systems are a recently emerging solar technology that allows for the simultaneous conversion of solar energy into both electricity and heat. This type of technology present some interesting advantages over the conventional ''side-by-side'' thermal and PV solar systems, such as higher combined electrical/thermal energy outputs per unit area, and a more uniform and aesthetical pleasant roof area. Despite the fact that early research on PV/T systems can be traced back to the seventies, only recently it has gained a renewed impetus. In this work, parametric studies and annual transient simulations of PV/T systems are undertaken in Simulink/Matlab. The obtained results show an average annual solar fraction of 67%, and a global overall efficiency of 24% (i.e. 15% thermal and 9% electrical), for a typical four-person single-family residence in Lisbon, with p-Si cells, and a collector area of 6 m{sup 2}. A sensitivity analysis performed on the PV/T collector suggests that the most important variable that should be addressed to improve thermal performance is the photovoltaic (PV) module emittance. Based on those results, some additional improvements are proposed, such as the use of vacuum, or a noble gas at low-pressure, to allow for the removal of PV cells encapsulation without air oxidation and degradation, and thus reducing the PV module emittance. Preliminary results show that this option allows for an 8% increase on optical thermal efficiency, and a substantial reduction of thermal losses, suggesting the possibility of working at higher fluid temperatures. The higher working temperatures negative effect in electrical efficiency was negligible, due to compensation by improved optical properties. The simulation results are compared with experimental data obtained from other authors and perform reasonably well. The Simulink modeling platform has been mainly used worldwide on simulation of control systems, digital signal processing and electric circuits, but there are very few examples of application to solar energy systems modeling. This work uses the modular environment of Simulink/Matlab to model individual PV/T system components, and to assemble the entire installation layout. The results show that the modular approach strategy provided by Matlab/Simulink environment is applicable to solar systems modeling, providing good code scalability, faster developing time, and simpler integration with external computational tools, when compared with traditional imperative-oriented programming languages. (author)

  14. China Solar Photovoltaic Group CNPV aka Dongying Photovoltaic...

    Open Energy Info (EERE)

    Group CNPV aka Dongying Photovoltaic Power Co Ltd or China Solar PV Jump to: navigation, search Name: China Solar Photovoltaic Group (CNPV, aka Dongying Photovoltaic Power Co Ltd...

  15. Photovoltaic solar cell

    DOE Patents [OSTI]

    Nielson, Gregory N; Okandan, Murat; Cruz-Campa, Jose Luis; Resnick, Paul J

    2013-11-26

    A photovoltaic solar cell for generating electricity from sunlight is disclosed. The photovoltaic solar cell comprises a plurality of spaced-apart point contact junctions formed in a semiconductor body to receive the sunlight and generate the electicity therefrom, the plurality of spaced-apart point contact junctions having a first plurality of regions having a first doping type and a second plurality of regions having a second doping type. In addition, the photovoltaic solar cell comprises a first electrical contact electrically connected to each of the first plurality of regions and a second electrical contact electrically connected to each of the second plurality of regions, as well as a passivation layer covering major surfaces and sidewalls of the photovoltaic solar cell.

  16. Photovoltaic solar cell

    DOE Patents [OSTI]

    Nielson, Gregory N; Cruz-Campa, Jose Luis; Okandan, Murat; Resnick, Paul J

    2014-05-20

    A photovoltaic solar cell for generating electricity from sunlight is disclosed. The photovoltaic solar cell comprises a plurality of spaced-apart point contact junctions formed in a semiconductor body to receive the sunlight and generate the electricity therefrom, the plurality of spaced-apart point contact junctions having a first plurality of regions having a first doping type and a second plurality of regions having a second doping type. In addition, the photovoltaic solar cell comprises a first electrical contact electrically connected to each of the first plurality of regions and a second electrical contact electrically connected to each of the second plurality of regions, as well as a passivation layer covering major surfaces and sidewalls of the photovoltaic solar cell.

  17. Solar Energy Technologies Program: Photovoltaics

    SciTech Connect (OSTI)

    2009-10-26

    Fact sheet summarizing the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  18. Design of solar cells for use in photovoltaic/thermal collectors

    SciTech Connect (OSTI)

    Cox, C.H. III

    1980-01-01

    A promising design development for combined photovoltaic/thermal (PV/T) collectors is one in which the photovoltaic cell is both the conversion device for electrical energy and the absorber of thermal energy. To accomplish this, the PV cell design is modified to use the approximately 25 percent of the air mass 1 spectrum at lambda > 1.1 ..mu..m that is currently rejected by the cell. The parameters investigated are: cell back metallization, back surface field, texture etching and anti-reflective coating. A model indicating the increase in absorptance as a function of these parameters is presented, together with the results of experimental measurements. Discussion closes with the presentation of a PV/T collector design that incorporates the improved cells, has 10 percent greater thermal output than current PV/T collectors, and exhibits no degradation in electrical output.

  19. Photovoltaic solar concentrator

    DOE Patents [OSTI]

    Nielson, Gregory N.; Gupta, Vipin P.; Okandan, Murat; Watts, Michael R.

    2016-03-15

    A photovoltaic solar concentrator is disclosed with one or more transverse-junction solar cells (also termed point contact solar cells) and a lens located above each solar cell to concentrate sunlight onto the solar cell to generate electricity. Piezoelectric actuators tilt or translate each lens to track the sun using a feedback-control circuit which senses the electricity generated by one or more of the solar cells. The piezoelectric actuators can be coupled through a displacement-multiplier linkage to provide an increased range of movement of each lens. Each lens in the solar concentrator can be supported on a frame (also termed a tilt plate) having three legs, with the movement of the legs being controlled by the piezoelectric actuators.

  20. Photovoltaic solar concentrator

    DOE Patents [OSTI]

    Nielson, Gregory N.; Okandan, Murat; Resnick, Paul J.; Cruz-Campa, Jose Luis

    2012-12-11

    A photovoltaic solar concentrator is disclosed with one or more transverse-junction solar cells (also termed point contact solar cells) and a lens located above each solar cell to concentrate sunlight onto the solar cell to generate electricity. Piezoelectric actuators tilt or translate each lens to track the sun using a feedback-control circuit which senses the electricity generated by one or more of the solar cells. The piezoelectric actuators can be coupled through a displacement-multiplier linkage to provide an increased range of movement of each lens. Each lens in the solar concentrator can be supported on a frame (also termed a tilt plate) having three legs, with the movement of the legs being controlled by the piezoelectric actuators.

  1. Photovoltaic solar cell

    DOE Patents [OSTI]

    Nielson, Gregory N.; Gupta, Vipin P.; Okandan, Murat; Watts, Michael R.

    2015-09-08

    A photovoltaic solar concentrator is disclosed with one or more transverse-junction solar cells (also termed point contact solar cells) and a lens located above each solar cell to concentrate sunlight onto the solar cell to generate electricity. Piezoelectric actuators tilt or translate each lens to track the sun using a feedback-control circuit which senses the electricity generated by one or more of the solar cells. The piezoelectric actuators can be coupled through a displacement-multiplier linkage to provide an increased range of movement of each lens. Each lens in the solar concentrator can be supported on a frame (also termed a tilt plate) having three legs, with the movement of the legs being controlled by the piezoelectric actuators.

  2. Concentrating photovoltaic solar panel

    DOE Patents [OSTI]

    Cashion, Steven A; Bowser, Michael R; Farrelly, Mark B; Hines, Braden E; Holmes, Howard C; Johnson, Jr., Richard L; Russell, Richard J; Turk, Michael F

    2014-04-15

    The present invention relates to photovoltaic power systems, photovoltaic concentrator modules, and related methods. In particular, the present invention features concentrator modules having interior points of attachment for an articulating mechanism and/or an articulating mechanism that has a unique arrangement of chassis members so as to isolate bending, etc. from being transferred among the chassis members. The present invention also features adjustable solar panel mounting features and/or mounting features with two or more degrees of freedom. The present invention also features a mechanical fastener for secondary optics in a concentrator module.

  3. Advancing Solar Through Photovoltaic Technology Innovations ...

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

    Solar Through Photovoltaic Technology Innovations Advancing Solar Through Photovoltaic Technology Innovations April 19, 2011 - 5:17pm Addthis At NREL's High-Intensity Pulse Solar ...

  4. Solar Photovoltaic Technologies - Energy Innovation Portal

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

    Technology Marketing Summaries Site Map Printable Version Share this resource About Search Categories (15) Advanced Materials Biomass and Biofuels Building Energy Efficiency Electricity Transmission Energy Analysis Energy Storage Geothermal Hydrogen and Fuel Cell Hydropower, Wave and Tidal Industrial Technologies Solar Photovoltaic Marketing Summaries (125) Success Stories (5) Solar Thermal Startup America Vehicles and Fuels Wind Energy Partners (27) Visual Patent Search Success Stories Browse

  5. Advancing Solar Through Photovoltaic Technology Innovations ...

    Energy Savers [EERE]

    Advancing Solar Through Photovoltaic Technology Innovations Advancing Solar Through Photovoltaic Technology Innovations April 19, 2011 - 5:17pm Addthis At NREL's High-Intensity ...

  6. UTILITY-SCALE PHOTOVOLTAIC SOLAR | Department of Energy

    Energy Savers [EERE]

    UTILITY-SCALE PHOTOVOLTAIC SOLAR UTILITY-SCALE PHOTOVOLTAIC SOLAR PDF icon SOLAR: UTILITY-SCALE PHOTOVOLTAIC SOLAR POSTER More Documents & Publications UTILITY-SCALE PHOTOVOLTAIC SOLAR Download LPO's Illustrated Poster Series ANTELOPE VALLEY SOLAR RANCH MESQUITE

  7. Renewable Energy Ready Home Solar Photovoltaic Specifications

    Office of Energy Efficiency and Renewable Energy (EERE)

    Solar Photovoltaic Specification, Checklist and Guide, from the U.S. Environmental Protection Agency.

  8. Powering New Markets: Utility-scale Photovoltaic Solar | Department...

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

    Powering New Markets: Utility-scale Photovoltaic Solar Powering New Markets: Utility-scale Photovoltaic Solar Powering New Markets: Utility-scale Photovoltaic Solar PDF icon ...

  9. Monitoring SERC Technologies - Solar Photovoltaics | Department...

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

    Photovoltaics Monitoring SERC Technologies - Solar Photovoltaics On Oct. 20, 2011, Peter McNutt, an electrical engineer with the Market Transformation Center at NREL, presented a ...

  10. Solar Photovoltaic Success Stories - Energy Innovation Portal

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

    Success Stories Site Map Printable Version Share this resource About Search Categories (15) Advanced Materials Biomass and Biofuels Building Energy Efficiency Electricity Transmission Energy Analysis Energy Storage Geothermal Hydrogen and Fuel Cell Hydropower, Wave and Tidal Industrial Technologies Solar Photovoltaic Marketing Summaries (125) Success Stories (5) Solar Thermal Startup America Vehicles and Fuels Wind Energy Partners (27) Visual Patent Search Success Stories Graphic of a full-grown

  11. Hybrid solar thermal-photovoltaic systems demonstration, Phase I and II. Final technical progress report, July 5, 1979-December 1982

    SciTech Connect (OSTI)

    Loferski, J.J.

    1983-12-01

    The purpose of the project is to investigate a system based on combined photovoltaic/thermal (PV/T) panels to supply the energy needs of a small single family residence. The system finally selected and constructed uses PV/T panels which utilize air as the heat transfer medium. Optimization of thermal performance was accomplished by attaching metal fins to the back surface of each cell which significantly increased the heat transfer coefficient from the solar cells to the air stream. The other major components of the selected system are an air-to-air heat pump, a rock bin thermal energy storage bin, a synchronous dc-to-ac converter, a microprocessor to control the system, a heat exchanger for the domestic hot water system and of course the building itself which is a one story, well insulated structure having a floor area of 1200 ft/sup 2/. A prototype collector was constructed and tested. Based on this experience, twenty collectors, containing 2860 four inch diameter solar cells, were constructed and installed on the building. Performance of the system was simulated using a TRNSYS-derived program, modified to accommodate PV/T panels and to include the particular components included in the selected system. Simulation of the performance showed that about 65 percent of the total annual energy needs of the building would be provided by the PV/T system. Of this total, about one half is produced at a time when it can be used in the building and one half must be sold back to the utility.

  12. Recording of SERC Monitoring Technologies - Solar Photovoltaics |

    Energy Savers [EERE]

    Department of Energy Recording of SERC Monitoring Technologies - Solar Photovoltaics Recording of SERC Monitoring Technologies - Solar Photovoltaics This document provides a transcript of the of SERC Monitoring Technologies - Solar Photovoltaics webinar, presented on 10/20/2011 by Peter McNutt. PDF icon serc_webinar_20111020_solar_pv_transcipt.pdf More Documents & Publications Sustainable Energy Resources for Consumers (SERC) - Solar Hot Water SERC Photovoltaics for Residential Buildings

  13. Sustainable Energy Resources for Consumers (SERC) - Solar Photovoltaic...

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

    - Solar Photovoltaics Sustainable Energy Resources for Consumers (SERC) - Solar Photovoltaics This presentation, aimed at Sustainable Energy Resources for Consumers (SERC) ...

  14. Flexible thermal cycle test equipment for concentrator solar cells

    DOE Patents [OSTI]

    Hebert, Peter H.; Brandt, Randolph J.

    2012-06-19

    A system and method for performing thermal stress testing of photovoltaic solar cells is presented. The system and method allows rapid testing of photovoltaic solar cells under controllable thermal conditions. The system and method presents a means of rapidly applying thermal stresses to one or more photovoltaic solar cells in a consistent and repeatable manner.

  15. Planar photovoltaic solar concentrator module

    DOE Patents [OSTI]

    Chiang, Clement J.

    1992-01-01

    A planar photovoltaic concentrator module for producing an electrical signal from incident solar radiation includes an electrically insulating housing having a front wall, an opposing back wall and a hollow interior. A solar cell having electrical terminals is positioned within the interior of the housing. A planar conductor is connected with a terminal of the solar cell of the same polarity. A lens forming the front wall of the housing is operable to direct solar radiation incident to the lens into the interior of the housing. A refractive optical element in contact with the solar cell and facing the lens receives the solar radiation directed into the interior of the housing by the lens and directs the solar radiation to the solar cell to cause the solar cell to generate an electrical signal. An electrically conductive planar member is positioned in the housing to rest on the housing back wall in supporting relation with the solar cell terminal of opposite polarity. The planar member is operable to dissipate heat radiated by the solar cell as the solar cell generates an electrical signal and further forms a solar cell conductor connected with the solar cell terminal to permit the electrical signal generated by the solar cell to be measured between the planar member and the conductor.

  16. Planar photovoltaic solar concentrator module

    DOE Patents [OSTI]

    Chiang, C.J.

    1992-12-01

    A planar photovoltaic concentrator module for producing an electrical signal from incident solar radiation includes an electrically insulating housing having a front wall, an opposing back wall and a hollow interior. A solar cell having electrical terminals is positioned within the interior of the housing. A planar conductor is connected with a terminal of the solar cell of the same polarity. A lens forming the front wall of the housing is operable to direct solar radiation incident to the lens into the interior of the housing. A refractive optical element in contact with the solar cell and facing the lens receives the solar radiation directed into the interior of the housing by the lens and directs the solar radiation to the solar cell to cause the solar cell to generate an electrical signal. An electrically conductive planar member is positioned in the housing to rest on the housing back wall in supporting relation with the solar cell terminal of opposite polarity. The planar member is operable to dissipate heat radiated by the solar cell as the solar cell generates an electrical signal and further forms a solar cell conductor connected with the solar cell terminal to permit the electrical signal generated by the solar cell to be measured between the planar member and the conductor. 5 figs.

  17. Solar Photovoltaic Technology Basics | Department of Energy

    Office of Environmental Management (EM)

    Solar Photovoltaic System Design Basics Solar Photovoltaic System Design Basics August 20, 2013 - 4:00pm Addthis Solar photovoltaic modules are where the electricity gets generated, but are only one of the many parts in a complete photovoltaic (PV) system. In order for the generated electricity to be useful in a home or business, a number of other technologies must be in place. Mounting Structures PV arrays must be mounted on a stable, durable structure that can support the array and withstand

  18. Solar Junction Develops World Record Setting Concentrated Photovoltaic...

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

    Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell Solar Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell April 18, 2013 - ...

  19. Agua Caliente, World's Largest Solar Photovoltaic Plant, Helps...

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

    Agua Caliente, World's Largest Solar Photovoltaic Plant, Helps Advance America's Solar Leadership Agua Caliente, World's Largest Solar Photovoltaic Plant, Helps Advance America's ...

  20. Sandia Energy - Sandia Tool Determines Value of Solar Photovoltaic...

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

    Tool Determines Value of Solar Photovoltaic Power Systems Home Renewable Energy Energy Partnership News News & Events Photovoltaic Solar Sandia Tool Determines Value of Solar...

  1. Solar Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell

    Broader source: Energy.gov [DOE]

    EERE supported the development of Solar Junction's concentrated photovoltaic technology that set a world record for conversion efficiency.

  2. Photovoltaic-Thermal New Technology Demonstration

    SciTech Connect (OSTI)

    Dean, Jesse; McNutt, Peter; Lisell, Lars; Burch, Jay; Jones, Dennis; Heinicke, David

    2015-01-01

    Photovoltaic-thermal (PV-T) hybrid solar systems offer increased electricity production by cooling the PV panel, and using the removed thermal energy to heat water - all in the same footprint as a standard PV system. GPG's assessment of the nation's first large-scale PV-T system installed at the Thomas P. O'Neill, Jr. Federal Building in Boston, MA, provided numerous lessons learned in system design, and identified a target market of locations with high utility costs and electric hot water backup.

  3. Selecting Solar: Insights into Residential Photovoltaic (PV)...

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

    Selecting Solar: Insights into Residential Photovoltaic (PV) Quote Variation Carolyn Davidson and Robert Margolis National Renewable Energy Laboratory Technical Report NREL...

  4. Solar Reflection Panels - Energy Innovation Portal

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

    Solar Thermal Solar Thermal Solar Photovoltaic Solar Photovoltaic Find More Like This Return to Search Solar Reflection Panels Sandia National Laboratories Contact SNL About This ...

  5. Solar Selective Absorption Coatings - Energy Innovation Portal

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

    Solar Thermal Solar Thermal Solar Photovoltaic Solar Photovoltaic Find More Like This Return to Search Solar Selective Absorption Coatings Sandia National Laboratories Contact SNL ...

  6. Udhaya Energy Photovoltaics P Ltd UPV Solar | Open Energy Information

    Open Energy Info (EERE)

    Udhaya Energy Photovoltaics P Ltd UPV Solar Jump to: navigation, search Name: Udhaya Energy Photovoltaics (P) Ltd. (UPV Solar) Place: Coimbatore, Tamil Nadu, India Zip: 641 407...

  7. EPV Solar Inc formerly Energy Photovoltaics | Open Energy Information

    Open Energy Info (EERE)

    EPV Solar Inc formerly Energy Photovoltaics Jump to: navigation, search Name: EPV Solar Inc (formerly Energy Photovoltaics) Place: Robbinsville, New Jersey Zip: 8691 Product: US...

  8. Ningbo Zhousheng Solar Photovoltaic Manufactory Co Ltd | Open...

    Open Energy Info (EERE)

    Zhousheng Solar Photovoltaic Manufactory Co Ltd Jump to: navigation, search Name: Ningbo Zhousheng Solar Photovoltaic Manufactory Co Ltd Place: Ningbo, Zhejiang Province, China...

  9. Bengbu Sanxin Solar Photovoltaic Glass Co Ltd | Open Energy Informatio...

    Open Energy Info (EERE)

    Bengbu Sanxin Solar Photovoltaic Glass Co Ltd Jump to: navigation, search Name: Bengbu Sanxin Solar Photovoltaic Glass Co Ltd Place: Bengbu, Anhui Province, China Product: Glass...

  10. Nantong Qiangsheng Photovoltaic Technology Co Ltd QS Solar |...

    Open Energy Info (EERE)

    Qiangsheng Photovoltaic Technology Co Ltd QS Solar Jump to: navigation, search Name: Nantong Qiangsheng Photovoltaic Technology Co Ltd (QS Solar) Place: Shanghai Municipality,...

  11. Jiangsu Jiasheng Photovoltaic Technology Co Ltd aka JS Solar...

    Open Energy Info (EERE)

    Jiasheng Photovoltaic Technology Co Ltd aka JS Solar Ltd Jump to: navigation, search Name: Jiangsu Jiasheng Photovoltaic Technology Co Ltd (aka JS Solar Ltd) Place: Jiangsu...

  12. Solar Photovoltaic Financing: Deployment on Public Property by...

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

    Solar Photovoltaic Financing: Deployment on Public Property by State and Local Governments Solar Photovoltaic Financing: Deployment on Public Property by State and Local ...

  13. NREL: Learning - Solar Photovoltaic Technology Basics

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

    Photovoltaic Technology Basics Photo of a large silicon solar array on a roof with a blue sky and trees in background. A large silicon solar array installed on the roof of a commercial building. Photo of a traditional-looking home with blue solar tiles integrated into the brown roof. Thin-film solar tiles installed on the roof of a home in Ohio. Photo of a long, blue solar array in a field of grass. A large solar array in Germany. Solar cells, also called photovoltaic (PV) cells by scientists,

  14. Solar photovoltaic reflective trough collection structure

    DOE Patents [OSTI]

    Anderson, Benjamin J.; Sweatt, William C.; Okandan, Murat; Nielson, Gregory N.

    2015-11-19

    A photovoltaic (PV) solar concentration structure having at least two troughs encapsulated in a rectangular parallelepiped optical plastic structure, with the troughs filled with an optical plastic material, the troughs each having a reflective internal surface and approximately parabolic geometry, and the troughs each including photovoltaic cells situated so that light impinging on the optical plastic material will be concentrated onto the photovoltaic cells. Multiple structures can be connected to provide a solar photovoltaic collection system that provides portable, efficient, low-cost electrical power.

  15. Solar Glare Hazard Analysis Tool (SGHAT) - Energy Innovation...

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

    Solar Thermal Solar Thermal Solar Photovoltaic Solar Photovoltaic Energy Analysis Energy Analysis Find More Like This Return to Search Solar Glare Hazard Analysis Tool (SGHAT) ...

  16. Tunable Nanocrystalline CZTS for Solar Photovoltaics with No Required

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

    Annealing - Energy Innovation Portal Solar Photovoltaic Solar Photovoltaic Find More Like This Return to Search Tunable Nanocrystalline CZTS for Solar Photovoltaics with No Required Annealing Colorado State University Contact CSU About This Technology Publications: PDF Document Publication Nanocrystal Summary (230 KB) Example solar cell Example solar cell Technology Marketing Summary Thin-film solar cells are expected to replace the current first generation of solar photovoltaic technology

  17. Pv-Thermal Solar Power Assembly

    DOE Patents [OSTI]

    Ansley, Jeffrey H.; Botkin, Jonathan D.; Dinwoodie, Thomas L.

    2001-10-02

    A flexible solar power assembly includes a flexible photovoltaic device attached to a flexible thermal solar collector. The solar power assembly can be rolled up for transport and then unrolled for installation on a surface, such as the roof or side wall of a building or other structure, by use of adhesive and/or other types of fasteners.

  18. NREL: Photovoltaics Research - Solar Energy Research Facility

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

    Solar Energy Research Facility Photo of the Solar Energy Research Facility. The exterior stepped clerestory of the Solar Energy Research Facility. Photovoltaics (PV) and basic energy sciences are two major research areas conducted in the Solar Energy Research Facility (SERF). The building incorporates a multitude of energy saving features that make it one of the government's most energy efficient buildings with 40 percent lower energy costs than similar buildings designed to meet federal energy

  19. Solar photovoltaics for development applications

    SciTech Connect (OSTI)

    Shepperd, L.W.; Richards, E.H.

    1993-08-01

    This document introduces photovoltaic technology to individuals and groups specializing in development activities. Examples of actual installations illustrate the many services supplied by photovoltaic systems in development applications, including water pumping, lighting, health care, refrigeration, communications, and a variety of productive uses. The various aspects of the technology are explored to help potential users evaluate whether photovoltaics can assist them in achieving their organizational goals. Basic system design, financing techniques, and the importance of infrastructure are included, along with additional sources of information and major US photovoltaic system suppliers.

  20. Diffraction: Enhanced Light Absorption of Solar Cells and Photodetecto...

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

    Solar Thermal Solar Thermal Solar Photovoltaic Solar Photovoltaic Advanced Materials Advanced Materials Find More Like This Return to Search Diffraction: Enhanced Light Absorption...

  1. Thermophotovoltaics | Solid State Solar Thermal Energy Conversion

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

    Thermophotovoltaics Solar Thermophotovoltaics (STPVs) are solar driven heat engines which extract electrical power from thermal radiation. The overall goal is to absorb and convert the broadband solar radiation spectrum into a narrowband thermal emission spectrum tuned to the spectral response of a photovoltaic cell (PV) [1]. STPVs are of significant interest as they have the potential to overcome the well-known Shockley-Queisser limit for single junction PV given sufficient spectral control.

  2. Linearly Polarized Thermal Emitter for More Efficient Thermophotovolta...

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

    Thermal Solar Thermal Solar Photovoltaic Solar Photovoltaic Find More Like This Return to Search Linearly Polarized Thermal Emitter for More Efficient Thermophotovoltaic Devices ...

  3. Scattering Solar Thermal Concentrators

    Office of Environmental Management (EM)

    sunshot DOEGO-102012-3669 * September 2012 MOTIVATION All thermal concentrating solar power (CSP) systems use solar tracking, which involves moving large mirror surfaces...

  4. Solar Thermal Technologies - Energy Innovation Portal

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

    Technology Marketing Summaries Site Map Printable Version Share this resource About Search Categories (15) Advanced Materials Biomass and Biofuels Building Energy Efficiency Electricity Transmission Energy Analysis Energy Storage Geothermal Hydrogen and Fuel Cell Hydropower, Wave and Tidal Industrial Technologies Solar Photovoltaic Solar Thermal Marketing Summaries (41) Success Stories (1) Startup America Vehicles and Fuels Wind Energy Partners (27) Visual Patent Search Success Stories Browse

  5. Linkages from DOE's Solar Photovoltaic R&D to Commercial Renewable...

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

    Solar Photovoltaic R&D to Commercial Renewable Power Generation from Solar Energy Linkages from DOE's Solar Photovoltaic R&D to Commercial Renewable Power Generation from Solar ...

  6. Photovoltaics

    SciTech Connect (OSTI)

    Solar Energy Technologies Program

    2010-09-28

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  7. Photovoltaics

    SciTech Connect (OSTI)

    Not Available

    2008-09-01

    Summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  8. Photovoltaics: Solar Energy Technologies Program (SETP) (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-10-01

    Fact sheet summarizing the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  9. Solar Contractor Licensing | Department of Energy

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

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

  10. Solar Photovoltaic (PV) System Permit Application Checklist

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Permit Application Checklist is intended to be used as a best management practice when establishing local government requirements for residential and commercial solar photovoltaic (PV) system permits. Local governments may modify this checklist to accommodate their local ordinances, code requirements, and permit procedures.

  11. PV/thermal solar power assembly

    DOE Patents [OSTI]

    Ansley, Jeffrey H.; Botkin, Jonathan D.; Dinwoodie, Thomas L.

    2004-01-13

    A flexible solar power assembly (2) includes a flexible photovoltaic device (16) attached to a flexible thermal solar collector (4). The solar power assembly can be rolled up for transport and then unrolled for installation on a surface, such as the roof (20, 25) or side wall of a building or other structure, by use of adhesive and/or other types of fasteners (23).

  12. Siting Solar Photovoltaics at Airports: Preprint

    SciTech Connect (OSTI)

    Kandt, A.; Romero, R.

    2014-06-01

    Airports present a significant opportunity for hosting solar technologies due to their open land; based on a 2010 Federal Aviation Administration study, the US Department of Agriculture, and the US Fish and Wildlife Service, there's potential for 116,704 MW of solar photovoltaics (PV) on idle lands at US airports. PV has a low profile and likely low to no impact on flight operations. This paper outlines guidance for implementing solar technologies at airports and airfields, focusing largely on the Federal Aviation Administration's policies. The paper also details best practices for siting solar at airports, provides information on the Solar Glare Hazard Analysis Tool, and highlights a case study example where solar has been installed at an airport.

  13. The design, construction, and monitoring of photovoltaic power system and solar thermal system on the Georgia Institute of Technology Aquatic Center. Volume 1

    SciTech Connect (OSTI)

    Long, R.C.

    1996-12-31

    This is a report on the feasibility study, design, and construction of a PV and solar thermal system for the Georgia Tech Aquatic Center. The topics of the report include a discussion of site selection and system selection, funding, design alternatives, PV module selection, final design, and project costs. Included are appendices describing the solar thermal system, the SAC entrance canopy PV mockup, and the PV feasibility study.

  14. Solar thermal aircraft

    DOE Patents [OSTI]

    Bennett, Charles L.

    2007-09-18

    A solar thermal powered aircraft powered by heat energy from the sun. A heat engine, such as a Stirling engine, is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller. The heat engine has a thermal battery in thermal contact with it so that heat is supplied from the thermal battery. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

  15. Solar Photovoltaic Cell/Module Shipments Report

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

    Solar Photovoltaic Cell/Module Shipments Report February 2016 Independent Statistics & Analysis www.eia.gov U.S. Department of Energy Washington, DC 20585 U.S. Energy Information Administration | Improving the Quality and Scope of EIA Data i This report was prepared by the U.S. Energy Information Administration (EIA), the statistical and analytical agency within the U.S. Department of Energy. By law, EIA's data, analyses, and forecasts are independent of approval by any other officer or

  16. Solar and Wind Rights | Department of Energy

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

    - 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...

  17. Scattering Solar Thermal Concentrators

    SciTech Connect (OSTI)

    Giebink, Noel C.

    2015-01-31

    This program set out to explore a scattering-based approach to concentrate sunlight with the aim of improving collector field reliability and of eliminating wind loading and gross mechanical movement through the use of a stationary collection optic. The approach is based on scattering sunlight from the focal point of a fixed collection optic into the confined modes of a sliding planar waveguide, where it is transported to stationary tubular heat transfer elements located at the edges. Optical design for the first stage of solar concentration, which entails focusing sunlight within a plane over a wide range of incidence angles (>120 degree full field of view) at fixed tilt, led to the development of a new, folded-path collection optic that dramatically out-performs the current state-of-the-art in scattering concentration. Rigorous optical simulation and experimental testing of this collection optic have validated its performance. In the course of this work, we also identified an opportunity for concentrating photovoltaics involving the use of high efficiency microcells made in collaboration with partners at the University of Illinois. This opportunity exploited the same collection optic design as used for the scattering solar thermal concentrator and was therefore pursued in parallel. This system was experimentally demonstrated to achieve >200x optical concentration with >70% optical efficiency over a full day by tracking with <1 cm of lateral movement at fixed latitude tilt. The entire scattering concentrator waveguide optical system has been simulated, tested, and assembled at small scale to verify ray tracing models. These models were subsequently used to predict the full system optical performance at larger, deployment scale ranging up to >1 meter aperture width. Simulations at an aperture widths less than approximately 0.5 m with geometric gains ~100x predict an overall optical efficiency in the range 60-70% for angles up to 50 degrees from normal. However, the concentrator optical efficiency was found to decrease significantly with increasing aperture width beyond 0.5 m due to parasitic waveguide out-coupling loss and low-level absorption that become dominant at larger scale. A heat transfer model was subsequently implemented to predict collector fluid heat gain and outlet temperature as a function of flow rate using the optical model as a flux input. It was found that the aperture width size limitation imposed by the optical efficiency characteristics of the waveguide limits the absolute optical power delivered to the heat transfer element per unit length. As compared to state-of-the-art parabolic trough CPV system aperture widths approaching 5 m, this limitation leads to an approximate factor of order of magnitude increase in heat transfer tube length to achieve the same heat transfer fluid outlet temperature. The conclusion of this work is that scattering solar thermal concentration cannot be implemented at the scale and efficiency required to compete with the performance of current parabolic trough CSP systems. Applied within the alternate context of CPV, however, the results of this work have likely opened up a transformative new path that enables quasi-static, high efficiency CPV to be implemented on rooftops in the form factor of traditional fixed-panel photovoltaics.

  18. Sandia Energy - Photovoltaic (PV) Regional Test Center (RTC)...

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

    Photovoltaic (PV) Regional Test Center (RTC) Website Goes Live Home Renewable Energy Energy Partnership News SunShot News & Events Photovoltaic Solar National Solar Thermal Test...

  19. Global Solar Photovoltaic (PV) Installation Market to be Propelled...

    Open Energy Info (EERE)

    Global Solar Photovoltaic (PV) Installation Market to be Propelled by Greater Concerns over Carbon Footprint Home > Groups > Renewable Energy RFPs John55364's picture Submitted by...

  20. Leading By Example Solar Photovoltaic Canopy Grant Program

    Broader source: Energy.gov [DOE]

    Massachusetts offers a state grant program for solar photovoltaic canopies installed at state facilities, including executive agencies, state institutions of higher education, and other quasi...

  1. Rooftop Solar Photovoltaic Technical Potential in the United...

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

    Contract No. DE-AC36-08GO28308 Rooftop Solar Photovoltaic ... Elmore National Renewable Energy Laboratory Technical ... Abbott-Whitley for their assistance in processing data. ...

  2. Sustainable Energy Resources for Consumers (SERC)- Solar Photovoltaics

    Broader source: Energy.gov [DOE]

    This presentation, aimed at Sustainable Energy Resources for Consumers (SERC) grantees, provides information on Monitoring Checklists for the installation of Solar Photovoltaics.

  3. A prototype photovoltaic/thermal system integrated with transpired collector

    SciTech Connect (OSTI)

    Athienitis, Andreas K.; Bambara, James; O'Neill, Brendan; Faille, Jonathan

    2011-01-15

    Building-integrated photovoltaic/thermal (BIPV/T) systems may be utilized to produce useful heat while simultaneously generating electricity from the same building envelope surface. A well known highly efficient collector is the open-loop unglazed transpired collector (UTC) which consists of dark porous cladding through which outdoor air is drawn and heated by absorbed solar radiation. Commercially available photovoltaic systems typically produce electricity with efficiencies up to about 18%. Thus, it is beneficial to obtain much of the normally wasted heat from the systems, possibly by combining UTC with photovoltaics. Combination of BIPV/T and UTC systems for building facades is considered in this paper - specifically, the design of a prototype facade-integrated photovoltaic/thermal system with transpired collector (BIPV/T). A full scale prototype is constructed with 70% of UTC area covered with PV modules specially designed to enhance heat recovery and compared to a UTC of the same area under outdoor sunny conditions with low wind. The orientation of the corrugations in the UTC is horizontal and the black-framed modules are attached so as to facilitate flow into the UTC plenum. While the overall combined thermal efficiency of the UTC is higher than that of the BIPV/T system, the value of the generated energy - assuming that electricity is at least four times more valuable than heat - is between 7% and 17% higher. Also, the electricity is always useful while the heat is usually utilized only in the heating season. The BIPV/T concept is applied to a full scale office building demonstration project in Montreal, Canada. The ratio of photovoltaic area coverage of the UTC may be selected based on the fresh air heating needs of the building, the value of the electricity generated and the available building surfaces. (author)

  4. The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects...

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

    The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects Data courtesy of National Renewable Energy ...

  5. The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects...

    Office of Environmental Management (EM)

    The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects Data courtesy of National Renewable Energy...

  6. Solar Thermal Technologies Available for Licensing - Energy Innovation

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

    Portal Thermal Site Map Printable Version Share this resource About Search Categories (15) Advanced Materials Biomass and Biofuels Building Energy Efficiency Electricity Transmission Energy Analysis Energy Storage Geothermal Hydrogen and Fuel Cell Hydropower, Wave and Tidal Industrial Technologies Solar Photovoltaic Solar Thermal Marketing Summaries (41) Success Stories (1) Startup America Vehicles and Fuels Wind Energy Partners (27) Visual Patent Search Success Stories Browse Solar Thermal

  7. Department of Veterans Affairs, FONSI - Ground mounted solar photovoltaic

    Energy Savers [EERE]

    power at San Joaquin National Cemetery | Department of Energy Ground mounted solar photovoltaic power at San Joaquin National Cemetery Department of Veterans Affairs, FONSI - Ground mounted solar photovoltaic power at San Joaquin National Cemetery An Environmental Assessment (EA) has been prepared under the direction of an interdisciplinary team analyzing the proposed construction of a Photovoltaic System at the San Joaquin National Cemetery (SNC) in San Joaquin, Calofornia. PDF icon CX

  8. Energy 101: Solar Photovoltaics | Department of Energy

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

    February 10, 2011 - 5:29pm Addthis Learn more about photovoltaic systems that convert ... What are the key facts? The literal translation of the word photovoltaic is ...

  9. Research & Development Needs for Building-Integrated Solar Technologie...

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

    and cooling, water heating, hybrid photovoltaic-thermal systems (PVT), active solar ... Home Technologies: Solar Thermal & Photovoltaic Systems; Volume 6 Building America ...

  10. New Hampshire Electric Co-op- Solar Photovoltaic Incentive Program

    Broader source: Energy.gov [DOE]

    New Hampshire Electric Co-op (NHEC) is offering rebates for residential and commercial, grid-tied solar photovoltaic (PV) systems up to one megawatt (MW) in capacity. The rebate is equal to $0.25...

  11. Two earth sheltered passive solar residences with photovoltaic electricity

    SciTech Connect (OSTI)

    Strong, S.J.; Osten, R.J. Jr.

    1980-01-01

    The design and construction of two earth sheltered passive solar residence with photovoltaic electricity are described. The sizing and design of the P.V. system as well as the module fabrication and array integration are also discussed.

  12. Concord Municipal Light Plant- Solar Photovoltaic Rebate Program

    Broader source: Energy.gov [DOE]

    Concord Municipal Light Plant (CMLP) offers rebates to customers who install solar photovoltaic (PV) systems that are designed to offset the customer's electrical needs. Systems must be owned by...

  13. High Temperature Thermal Array for Next Generation Solar Thermal...

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

    High Temperature Thermal Array for Next Generation Solar Thermal Power Production High Temperature Thermal Array for Next Generation Solar Thermal Power Production This ...

  14. Solar Photovoltaic Financing: Residential Sector Deployment | Department of

    Energy Savers [EERE]

    Energy Photovoltaic Financing: Residential Sector Deployment Solar Photovoltaic Financing: Residential Sector Deployment This report presents the information that homeowners and policy makers need to facilitate PV financing at the residential level. The full range of cash payments, bill savings, and tax incentives is covered, as well as potentially available solar attribute payments. Traditional financing is also compared to innovative solutions, many of which are borrowed from the

  15. Sylcom Solar | Open Energy Information

    Open Energy Info (EERE)

    Sylcom Solar provides the design, research, distribution, construction, operation, maintenance of products and of Photovoltaic Solar, Thermal Solar and Solar Thermoelectric...

  16. Modular assembly of a photovoltaic solar energy receiver

    DOE Patents [OSTI]

    Graven, Robert M.; Gorski, Anthony J.; Schertz, William W.; Graae, Johan E. A.

    1978-01-01

    There is provided a modular assembly of a solar energy concentrator having a photovoltaic energy receiver with passive cooling. Solar cell means are fixedly coupled to a radiant energy concentrator. Tension means bias a large area heat sink against the cell thereby allowing the cell to expand or contract with respect to the heat sink due to differential heat expansion.

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

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

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

  18. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    6 Number of companies expecting to introduce new solar new solar thermal collector products in 2010 Low-Temperature Collectors 4 Medium-Temperature Collectors 16 High-Temperature Collectors 11 Noncollector Components 12 Form EIA-63A, "Annual Solar Thermal Collector Manufacturers Survey." New Product Type Number of Companies Source: U.S. Energy Information Administration,

  19. Solar thermal power system

    DOE Patents [OSTI]

    Bennett, Charles L.

    2010-06-15

    A solar thermal power generator includes an inclined elongated boiler tube positioned in the focus of a solar concentrator for generating steam from water. The boiler tube is connected at one end to receive water from a pressure vessel as well as connected at an opposite end to return steam back to the vessel in a fluidic circuit arrangement that stores energy in the form of heated water in the pressure vessel. An expander, condenser, and reservoir are also connected in series to respectively produce work using the steam passed either directly (above a water line in the vessel) or indirectly (below a water line in the vessel) through the pressure vessel, condense the expanded steam, and collect the condensed water. The reservoir also supplies the collected water back to the pressure vessel at the end of a diurnal cycle when the vessel is sufficiently depressurized, so that the system is reset to repeat the cycle the following day. The circuital arrangement of the boiler tube and the pressure vessel operates to dampen flow instabilities in the boiler tube, damp out the effects of solar transients, and provide thermal energy storage which enables time shifting of power generation to better align with the higher demand for energy during peak energy usage periods.

  20. Linkages from DOE's Solar Photovoltaic R&D to Commercial Renewable Power

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

    Generation from Solar Energy | Department of Energy Solar Photovoltaic R&D to Commercial Renewable Power Generation from Solar Energy Linkages from DOE's Solar Photovoltaic R&D to Commercial Renewable Power Generation from Solar Energy The U.S. Department of Energy's (DOE) Solar Photovoltaic R&D Subprogram promotes the development of cost-effective systems for directly converting solar energy into electricity for residential, commercial, and industrial applications. This study

  1. Multiband semiconductor compositions for photovoltaic devices...

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

    Hydrogen and Fuel Cell Hydropower, Wave and Tidal Industrial Technologies Solar Photovoltaic Solar Thermal Startup America Vehicles and Fuels Wind Energy Partners (27) Visual...

  2. Solar Thermal Electric | Open Energy Information

    Open Energy Info (EERE)

    Thermal Electric Jump to: navigation, search TODO: Add description List of Solar Thermal Electric Incentives Retrieved from "http:en.openei.orgwindex.php?titleSolarThermalEl...

  3. DOE to Provide Up to $17.6 Million for Solar Photovoltaic Technology...

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

    Up to 17.6 Million for Solar Photovoltaic Technology Development DOE to Provide Up to 17.6 Million for Solar Photovoltaic Technology Development September 29, 2008 - 3:43pm ...

  4. Overview of solar thermal technologies

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    The solar-thermal overview section of the Renewable Energy Technology Characterizations describes the technical and economic status of this emerging renewable energy option for electricity supply.

  5. Laminated photovoltaic modules using back-contact solar cells

    DOE Patents [OSTI]

    Gee, James M.; Garrett, Stephen E.; Morgan, William P.; Worobey, Walter

    1999-09-14

    Photovoltaic modules which comprise back-contact solar cells, such as back-contact crystalline silicon solar cells, positioned atop electrically conductive circuit elements affixed to a planar support so that a circuit capable of generating electric power is created. The modules are encapsulated using encapsulant materials such as EVA which are commonly used in photovoltaic module manufacture. The module designs allow multiple cells to be electrically connected in a single encapsulation step rather than by sequential soldering which characterizes the currently used commercial practices.

  6. Distributed Solar Photovoltaics for Electric Vehicle Charging...

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

    an opportunity for market expansion of distributed solar technology. A major barrier to the current deployment of solar technology for EV charging is a lack of clear ...

  7. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    8 Employment in the solar thermal collector industry, 2000 - 2009 2000 284 2001 256 2002 356 2003 287 2004 317 2005 353 2006 1,069 2007 686 2008 1,083 2009 1,321 Year Person-Years Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal

  8. Nanoscience and Nanostructures for Photovoltaics and Solar Fuels

    SciTech Connect (OSTI)

    Nozik, Arthur J.

    2010-07-02

    Quantum confinement of electronic particles (negative electrons and positive holes) in nanocrystals produces unique optical and electronic properties that have the potential to enhance the power conversion efficiency of solar cells for photovoltaic and solar fuels production at lower cost. These approaches and applications are labeled third generation solar photon conversion. Prominent among these unique properties is the efficient formation of more than one electron-hole pair (called excitons in nanocrystals) from a single absorbed photon. In isolated nanocrystals that have three-dimensional confinement of charge carriers (quantum dots) or two-dimensional confinement (quantum wires and rods) this process is termed multiple exciton generation. This Perspective presents a summary of our present understanding of the science of optoelectronic properties of nanocrystals and a prognosis for and review of the technological status of nanocrystals and nanostructures for third generation photovoltaic cells and solar fuels production.

  9. Sandia and EMCORE: Solar Photovoltaics, Fiber Optics, MODE, and Energy

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

    Efficiency EMCORE: Solar Photovoltaics, Fiber Optics, MODE, and Energy Efficiency - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing

  10. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    Solar Photovoltaic Cell/Module Shipments Report February 2016 Independent Statistics & Analysis www.eia.gov U.S. Department of Energy Washington, DC 20585 U.S. Energy Information Administration | Improving the Quality and Scope of EIA Data i This report was prepared by the U.S. Energy Information Administration (EIA), the statistical and analytical agency within the U.S. Department of Energy. By law, EIA's data, analyses, and forecasts are independent of approval by any other officer or

  11. Photovoltaics and Solar Energy (2 Activities)

    K-12 Energy Lesson Plans and Activities Web site (EERE)

    This module addresses issues dealing with the energy from the sun, the energy needs of students in the classroom and, ultimately, our energy needs as a nation. Students will use a photovoltaic (PV) cell to measure the energy from the sun. Using a light bulb with a known wattage, the students will illuminate the bulb using a PV cell. This way the students will know the approximate energy coming from the PV cell.

  12. Solar Thermal Demonstration Project

    SciTech Connect (OSTI)

    Biesinger, K.; Cuppett, D.; Dyer, D.

    2012-01-30

    HVAC Retrofit and Energy Efficiency Upgrades at Clark High School, Las Vegas, Nevada The overall objectives of this project are to increase usage of alternative/renewable fuels, create a better and more reliable learning environment for the students, and reduce energy costs. Utilizing the grant resources and local bond revenues, the District proposes to reduce electricity consumption by installing within the existing limited space, one principal energy efficient 100 ton adsorption chiller working in concert with two 500 ton electric chillers. The main heating source will be primarily from low nitrogen oxide (NOX), high efficiency natural gas fired boilers. With the use of this type of chiller, the electric power and cost requirements will be greatly reduced. To provide cooling to the information technology centers and equipment rooms of the school during off-peak hours, the District will install water source heat pumps. In another measure to reduce the cooling requirements at Clark High School, the District will replace single pane glass and metal panels with ‘Kalwall’ building panels. An added feature of the “Kalwall” system is that it will allow for natural day lighting in the student center. This system will significantly reduce thermal heat/cooling loss and control solar heat gain, thus delivering significant savings in heating ventilation and air conditioning (HVAC) costs.

  13. Solar Leasing for Residential Photovoltaic Systems

    Broader source: Energy.gov [DOE]

    This publication examines the solar lease option for residential PV systems and describes two solar lease programs already in place. As a result of the $2,000 cap on the residential ITC being lifted in 2009, the expansion of the solar lease model across the United States may be slower than anticipated. The lease model, though, still offers homeowners some distinct advantages. This publication helps homeowners revisit the comparison between the solar lease and home-equity financing in light of the change to the ITC.

  14. NREL to Host Photovoltaics Presentation at 2014 Solar Day - News Releases |

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

    NREL to Host Photovoltaics Presentation at 2014 Solar Day June 3, 2014 The Energy Department's National Renewable Energy Laboratory will host several events at the 2014 Denver Solar Day on Sunday, June 8. The free expo is expected to attract more than 2,000 photovoltaics (PV) installers, PV buyers, students, utility officials and members of the public. NREL, a global leader in solar photovoltaic research, also takes a leading role in educating the public about renewable energy. Solar Day

  15. Solar Thermal Collector Manufacturing Activities

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

    41 388 2009 10,511 809 2,307 32 980 - No data reported. ... disclosed. Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal Collector ...

  16. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    U.S. Total 5,517,291 3,455,846 100.00 - No data reported. ... rounding. Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal Collector ...

  17. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    7 Import shipments of solar thermal collectors by type, 2000 ... 687 - 5,517 2009 1,987 715 754 3,456 - No data reported. ... Source: U.S. Energy Information Administration, Form ...

  18. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    5 Shipments of complete solar thermal collector systems, 2008 and 2009 Shipment Information 2008 2009 Complete Collector Systems Shipped 63,961 75,066 Thousand Square Feet 4,058 5,995 Percent of Total Shipments 24 43 Number of Companies 46 62 Revenue of Systems (Thousand Dollars) 47,523 159,085 Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal Collector Manufacturers Survey."

  19. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    9 Companies involved in solar thermal collector related activities by type, 2008 and 2009 Type of Activity 2008 2009 Collector or System Design 45 59 Prototype Collector Development 27 27 Prototype System Development 23 23 Wholesale Distribution 58 61 Retail Distribution 29 31 Installation 21 27 Noncollector System Component Manufacture 26 32 Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal

  20. Design, construction, and startup of a concentrating photovoltaic solar energy system in Hawaii: Phase II. Final report

    SciTech Connect (OSTI)

    Spencer, R.; Harper, R.; Maberry, G.; Bedard, R.; Rafinejad, D.

    1982-10-01

    Acurex Corporation has designed, constructed, and is now operating a 35-kWp concentrating photovoltaic solar system located at the G.N. Wilcox Memorial Hospital in Lihue, Kauai, Hawaii. The facility consists of 446 m/sup 2/ (4800 ft/sup 2/) of parabolic trough photovoltaic collectors, an electrical power generation system which converts the direct current field output into grid-compatible alternating current power, and a thermal power subsystem for heating the hospital potable water. This report summarizes the design, construction, startup, and performance of this solar facility.

  1. Lightweight 'solar cloth' photovoltaics have flexible future...

    Open Energy Info (EERE)

    content Printed decorative solar panels could become part of our homes and offices Hello, I provide user supp... The top one on this page: htt... Can you send the specific...

  2. Photovoltaics

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

    Photovoltaics - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle Defense Waste Management Programs Advanced Nuclear

  3. Solar and Photovoltaic Data from the University of Oregon Solar Radiation Monitoring Laboratory (UO SRML)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The UO SRML is a regional solar radiation data center whose goal is to provide sound solar resource data for planning, design, deployment, and operation of solar electric facilities in the Pacific Northwest. The laboratory has been in operation since 1975. Solar data includes solar resource maps, cumulative summary data, daily totals, monthly averages, single element profile data, parsed TMY2 data, and select multifilter radiometer data. A data plotting program and other software tools are also provided. Shade analysis information and contour plots showing the effect of tilt and orientation on annual solar electric system perfomance make up a large part of the photovoltaics data.(Specialized Interface)

  4. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    4 Average thermal performance rating of solar thermal collectors by type shipped in 2009 (Btu per square foot per day) Low- High Temperature Temperature Liquid/air Parabolic Year Metallic and Nonmetallic Air ICS/Thermosi phon Flat-Plate (Pumped) Evaculated Tube Concentrator Paraboloic Dish/Trough 2009 1,139 971 913 981 973 2,196 1,262 Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal Collector Manufacturers Survey." Medium-Temperature Type Liquid

  5. Solar photovoltaic applications seminar: design, installation and operation of small, stand-alone photovoltaic power systems

    SciTech Connect (OSTI)

    Not Available

    1980-07-01

    This seminar material was developed primarily to provide solar photovoltaic (PV) applied engineering technology to the Federal community. An introduction to photoconductivity, semiconductors, and solar photovoltaic cells is included along with a demonstration of specific applications and application identification. The seminar details general systems design and incorporates most known information from industry, academia, and Government concerning small solar cell power system design engineering, presented in a practical and applied manner. Solar PV power system applications involve classical direct electrical energy conversion and electric power system analysis and synthesis. Presentations and examples involve a variety of disciplines including structural analysis, electric power and load analysis, reliability, sizing and optimization; and, installation, operation and maintenance. Four specific system designs are demonstrated: water pumping, domestic uses, navigational and aircraft aids, and telecommunications. All of the applications discussed are for small power requirement (under 2 kilowatts), stand-alone systems to be used in remote locations. Also presented are practical lessons gained from currently installed and operating systems, problems at sites and their resolution, a logical progression through each major phase of system acquisition, as well as thorough design reviews for each application.

  6. Japan's Solar Photovoltaic (PV) Market: An Analysis of Residential System Prices (Presentation)

    SciTech Connect (OSTI)

    James, T.

    2014-03-01

    This presentation summarizes market and policy factors influencing residential solar photovoltaic system prices in Japan, and compares these factors to related developments in the United States.

  7. Passive Solar Building Design and Solar Thermal Space Heating Webinar

    Broader source: Energy.gov [DOE]

    Webinar of National Renewable Energy Laboratory (NREL) Senior Engineer Andy Walker's presentation about passive solar building design and solar thermal space heating technologies and applications.

  8. Photovoltaic switching mechanism in lateral structure hybrid perovskite solar cells

    SciTech Connect (OSTI)

    Yuan, Yongbo; Chae, Jungseok; Shao, Yuchuan; Wang, Qi; Xiao, Zhengguo; Centrone, Andrea; Huang, Jinsong

    2015-06-05

    In this study, long range electromigration of methylammonium ions (MA+) in methyl ammonium lead tri-iodide (MAPbI3) film is observed directly using the photo­thermal induced resonance technique. The electromigration of MA+ leads to the formation of a lateral p-i-n structure, which is the origin of the switchable photovoltaic effect in MAPbI3 perovskite devices.

  9. Photovoltaic switching mechanism in lateral structure hybrid perovskite solar cells

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

    Yuan, Yongbo; Chae, Jungseok; Shao, Yuchuan; Wang, Qi; Xiao, Zhengguo; Centrone, Andrea; Huang, Jinsong

    2015-06-05

    In this study, long range electromigration of methylammonium ions (MA+) in methyl ammonium lead tri-iodide (MAPbI3) film is observed directly using the photo­thermal induced resonance technique. The electromigration of MA+ leads to the formation of a lateral p-i-n structure, which is the origin of the switchable photovoltaic effect in MAPbI3 perovskite devices.

  10. Pueblo of Jemez - Concentrating Photovoltaics Solar Project

    Energy Savers [EERE]

    Solar Project November 17, 2008 Greg Kaufman Environmental Scientist Pueblo of Jemez Department of Resource Protection 575-834-3210 gkaufman@jemezpueblo-drp.org The Pueblo of Jemez * Federally-recognized Tribe * 45 Miles NW of Albuquerque, NM * Has occupied the Jemez Valley for over 800 years. * 2,200 Tribal members in village of Walatowa; 3,000 Tribal members total. * Only Towa-speaking Tribe. Population has high Towa fluency rate. * Has a unique K-12 charter school system emphasizing science

  11. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    1 Distribution of domestic solar thermal collector shipments (thousand square feet) 2008 2009 Wholesale Distributors 8,680 4,063 Retail Distributors 3,997 5,739 Exporters 368 346 Installers 948 939 End Users 723 1,134 U.S. Total 14,716 12,221 Customer Type Shipments Notes: Totals may not equal sum of components due to independent rounding. U.S. total includes territories. Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal Collector Manufacturers Survey

  12. Photovoltaics | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaics (Redirected from Solar Photovoltaics) Jump to: navigation, search (The following text is derived from NREL's description of photovoltaic technology.)1 Photovoltaic...

  13. Sandia Energy - National Solar Thermal Testing Facility Beam...

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

    National Solar Thermal Testing Facility Beam Profiling Home Renewable Energy News Concentrating Solar Power Solar National Solar Thermal Testing Facility Beam Profiling Previous...

  14. Status report on a solar photovoltaic concentrating energy system for a hospital in Hawaii

    SciTech Connect (OSTI)

    Seki, A.; Curtis, G.; Yuen, P.

    1983-06-01

    The largest parabolic concentrating photovoltaic/solar thermal system in the U.S. began producing electricity and hot water for a hospital on the island of Kauai, Hawaii in November 1981. Each of the 80 parabolic collectors is 6 feet by 10 feet and concentrates incident sunlight on photovoltaic cells mounted on two faces of the receiver at the focus. Although the 35 kilowatt system has been designed to produce 22,000 net kilowatt-hours per year of electricity and 620,000 gallons of 180 F water, electrical output (12 to 15 kilowatt-hours per day) is only 20 percent of that expected, primarily because insolation at the site has been only 40 percent of predicted values. A second problem with fungal attack on the receivers has been solved by better sealing. The system has also withstood a hurricane with negligible damage.

  15. Solar Photovoltaic Financing: Residential Sector Deployment

    SciTech Connect (OSTI)

    Coughlin, J.; Cory, K.

    2009-03-01

    This report presents the information that homeowners and policy makers need to facilitate PV financing at the residential level. The full range of cash payments, bill savings, and tax incentives is covered, as well as potentially available solar attribute payments. Traditional financing is also compared to innovative solutions, many of which are borrowed from the commercial sector. Together, these mechanisms are critical for making the economic case for a residential PV installation, given its high upfront costs. Unfortunately, these programs are presently limited to select locations around the country. By calling attention to these innovative initiatives, this report aims to help policy makers consider greater adoption of these models to benefit homeowners interested installing a residential PV system.

  16. Solar/Wind Contractor Licensing | Open Energy Information

    Open Energy Info (EERE)

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

  17. Dalkia Solar | Open Energy Information

    Open Energy Info (EERE)

    Agullent, Spain Zip: 46890 Sector: Solar Product: Agullent-based installer of photovoltaic and solar thermal power plants. Coordinates: 38.824755, -0.547039 Show Map...

  18. High Efficiency Nanostructured III-V Photovoltaics for Solar Concentrator Application

    SciTech Connect (OSTI)

    Hubbard, Seth

    2012-09-12

    The High Efficiency Nanostructured III-V Photovoltaics for Solar Concentrators project seeks to provide new photovoltaic cells for Concentrator Photovoltaics (CPV) Systems with higher cell efficiency, more favorable temperature coefficients and less sensitivity to changes in spectral distribution. The main objective of this project is to provide high efficiency III-V solar cells that will reduce the overall cost per Watt for power generation using CPV systems.This work is focused both on a potential near term application, namely the use of indium arsenide (InAs) QDs to spectrally "tune" the middle (GaAs) cell of a SOA triple junction device to a more favorable effective bandgap, as well as the long term goal of demonstrating intermediate band solar cell effects. The QDs are confined within a high electric field i-region of a standard GaAs solar cell. The extended absorption spectrum (and thus enhanced short circuit current) of the QD solar cell results from the increase in the sub GaAs bandgap spectral response that is achievable as quantum dot layers are introduced into the i-region. We have grown InAs quantum dots by OMVPE technique and optimized the QD growth conditions. Arrays of up to 40 layers of strain balanced quantum dots have been experimentally demonstrated with good material quality, low residual stain and high PL intensity. Quantum dot enhanced solar cells were grown and tested under simulated one sun AM1.5 conditions. Concentrator solar cells have been grown and fabricated with 5-40 layers of QDs. Testing of these devices show the QD cells have improved efficiency compared to baseline devices without QDs. Device modeling and measurement of thermal properties were performed using Crosslight APSYS. Improvements in a triple junction solar cell with the insertion of QDs into the middle current limiting junction was shown to be as high as 29% under one sun illumination for a 10 layer stack QD enhanced triple junction solar cell. QD devices have strong potential for net gains in efficiency at high concentration.

  19. Linkages for DOE's Solar Photovoltaic R&D to Commercial Renewable Power from Solar Energy

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy‘s (DOE) Solar Photovoltaic R&D Subprogram promotes the development of cost-effective systems for directly converting solar energy into electricity for residential, commercial, and industrial applications. This study was commissioned to assess the extent to which the knowledge outputs of R&D funded by the DOE Solar PV Subprogram are linked to downstream developments in commercial renewable power. A second purpose was to identify spillovers of the resulting knowledge to other areas of application. A third purpose was to lend support to a parallel benefit-cost study by contributing evidence of attribution of benefits to DOE.

  20. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    0 Soloar-related sales as a percentage of total company sales revenue, 2008 and 2009 2008 2009 90-100 49 56 50-89 9 7 10-49 7 12 Less than 10 9 13 U.S. Total 74 88 Percent of Total Sales Revenue Number of Companies Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal Collector Manufacturers Survey."

  1. Valuation of Solar Photovoltaic Systems Using a Discounted Cash Flow Approach

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

    Valuation of Solar Photovoltaic Systems Using a Discounted Cash Flow Approach by Geoffrey T. Klise, Jamie L. Johnson, and Sandra K. Adomatis, SRA Solar energy systems include photovoltaic (PV) materials and devices that convert sunlight into electric energy; PV cells are commonly called solar cells. 1 The rate of PV system installations for residential and commercial markets has increased substantially over the past five years. Several reasons for the growth in PV installations include

  2. Thermal equation of state and spin transition of magnesiosiderite...

    Office of Scientific and Technical Information (OSTI)

    Citation Details In-Document Search Title: Thermal equation of ... Subject: catalysis (heterogeneous), solar (photovoltaic), phonons, thermoelectric, energy storage (including ...

  3. Solar kinetics` photovoltaic concentrator module and tracker development

    SciTech Connect (OSTI)

    White, D.L.; Howell, B. [Solar Kinetics, Inc., Dallas, TX (United States)

    1995-11-01

    Solar Kinetics, Inc., has been developing a point-focus concentrating photovoltaic module and tracker system under contract to Sandia National Laboratories. The primary focus of the contract was to achieve a module design that was manufacturable and passed Sandia`s environmental testing. Nine modules of two variations were assembled, tested, and characterized in Phase 1, and results of these tests were promising, with module efficiency approaching the theoretical limit achievable with the components used. The module efficiency was 11.9% at a solar irradiance of 850 W/m{sup 2} and an extrapolated cell temperature of 25{degrees}C. Improvements in module performance are anticipated as cell efficiencies meet their expectations. A 2-kW tracker and controller accommodating 20 modules was designed, built, installed, and operated at Solar Kinetics` test site. The drive used many commercially available components in an innovative arrangement to reduce cost and increase reliability. Backlash and bearing play were controlled by use of preloaded, low slip-stick, synthetic slide bearings. The controller design used a standard industrial programmable logic controller to perform ephemeris calculations, operate the actuators, and monitor encoders.

  4. Generic solar photovoltaic system dynamic simulation model specification.

    SciTech Connect (OSTI)

    Ellis, Abraham; Behnke, Michael Robert; Elliott, Ryan Thomas

    2013-10-01

    This document is intended to serve as a specification for generic solar photovoltaic (PV) system positive-sequence dynamic models to be implemented by software developers and approved by the WECC MVWG for use in bulk system dynamic simulations in accordance with NERC MOD standards. Two specific dynamic models are included in the scope of this document. The first, a Central Station PV System model, is intended to capture the most important dynamic characteristics of large scale (> 10 MW) PV systems with a central Point of Interconnection (POI) at the transmission level. The second, a Distributed PV System model, is intended to represent an aggregation of smaller, distribution-connected systems that comprise a portion of a composite load that might be modeled at a transmission load bus.

  5. EmmVee Solar Systems Pvt Ltd ESSPL | Open Energy Information

    Open Energy Info (EERE)

    Bangalore, Karnataka, India Zip: 560 024 Sector: Solar Product: Manufactures and markets solar thermal and solar photovoltaic products. Coordinates: 12.97092, 77.60482 Show...

  6. Gehrlicher Solar AG | Open Energy Information

    Open Energy Info (EERE)

    96465 Sector: Solar Product: Germany-based company that plans, builds and markets photovoltaic and solar thermal plants. It consults for local, private and environmental...

  7. Solar energy thermalization and storage device

    DOE Patents [OSTI]

    McClelland, J.F.

    A passive solar thermalization and thermal energy storage assembly which is visually transparent is described. The assembly consists of two substantial parallel, transparent wall members mounted in a rectangular support frame to form a liquid-tight chamber. A semitransparent thermalization plate is located in the chamber, substantially paralled to and about equidistant from the transparent wall members to thermalize solar radiation which is stored in a transparent thermal energy storage liquid which fills the chamber. A number of the devices, as modules, can be stacked together to construct a visually transparent, thermal storage wall for passive solar-heated buildings.

  8. Solar energy thermalization and storage device

    DOE Patents [OSTI]

    McClelland, John F.

    1981-09-01

    A passive solar thermalization and thermal energy storage assembly which is visually transparent. The assembly consists of two substantial parallel, transparent wall members mounted in a rectangular support frame to form a liquid-tight chamber. A semitransparent thermalization plate is located in the chamber, substantially paralled to and about equidistant from the transparent wall members to thermalize solar radiation which is stored in a transparent thermal energy storage liquid which fills the chamber. A number of the devices, as modules, can be stacked together to construct a visually transparent, thermal storage wall for passive solar-heated buildings.

  9. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    2 Solar thermal collector shipments by type, quantity, revenue, and average price, 2008 and 2009 Quantity (thousand square feet) Revenue (thousand dollars) Average Price (dollars per square foot) Quantity (thousand square feet) Revenue (thousand dollars) Average Price (dollars per square foot) Low-Temperature Liquid and Air 14,015 26,518 1.89 10,511 20,411 1.94 Medium-Temperature 2,560 50,109 19.57 2,307 51,483 22.32 Air 28 1,256 45.46 22 883 40.31 Liquid ICS/Thermosiphon 321 6,631 20.66 147

  10. Insuring Solar Photovoltaics: Challenges and Possible Solutions; (Revised)

    SciTech Connect (OSTI)

    Speer, B.; Mendelsohn, M.; Cory, K.

    2010-02-01

    Insuring solar photovoltaic (PV) systems poses certain challenges. Insurance premiums, which can represent a significant part of overall costs for PV developers, can affect market competition. The market for certain types of insurance products is limited. Historical loss data is lacking, and test data for the long-term viability of PV products under real-life conditions is limited. Insurers' knowledge about PV systems and the PV industry is uneven even as the industry introduces innovative contractual structures and business models. Interviews conducted for this report with PV project developers, insurance brokers, and underwriters suggest government actions aimed at better testing, data collection, and communication could facilitate the development of a market for PV insurance products. This report identifies actions by governments, national laboratories, and other stakeholders that could accelerate the development of insurance products in support PV systems. Such actions include: increasing understanding of the solar PV industry among insurance professionals; expanding the availability of PV historical loss data; evaluating the expansion of renewable energy business classification; developing module and component testing capabilities and services offered by federal labs; and, advancing industry standards for PV system installers.

  11. Photovoltaics | Open Energy Information

    Open Energy Info (EERE)

    to: navigation, search (The following text is derived from NREL's description of photovoltaic technology.)1 Photovoltaic Panels Solar cells, also called photovoltaic (PV)...

  12. Photovoltaics | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaics Jump to: navigation, search (The following text is derived from NREL's description of photovoltaic technology.)1 Photovoltaic Panels Solar cells, also called...

  13. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    Annual shipments of solar thermal collectors by disposition, 2000 - 2009 (thousand square feet) Exports Domestic Shipments Total 2000 26 496 7,857 8,354 2001 26 840 10,349 11,189 2002 27 659 11,004 11,663 2003 26 518 10,926 11,444 2004 24 813 13,301 14,114 2005 25 1,361 14,680 16,041 2006 44 1,211 19,532 20,744 2007 60 1,376 13,777 15,153 2008 74 2,247 14,716 16,963 2009 88 1,577 12,221 13,798 Total shipments as reported by respondents include all domestic and export shipments and may include

  14. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    Shipments of solar thermal collectors ranked by origin and destination, 2009 Origin Top Five States 10,031 73 California 4,402 32 New Jersey 4,019 29 Florida 1,299 9 Arizona 164 1 Virginia 148 1 Other Domestic 311 2 Imported 3,456 25 U.S. Total 13,798 100 Destination Top Five States 8,961 65 Florida 3,771 27 California 3,537 26 Arizona 745 5 Hawaii 520 4 Oregon 387 3 Other Domestic 3,260 24 Exported 1,577 11 U.S. Total 13,798 100 Source: U.S. Energy Information Administration, Form EIA-63A,

  15. The DOE Solar Thermal Electric Program

    SciTech Connect (OSTI)

    Mancini, T.R.

    1994-06-01

    The Department of Energy`s Solar Thermal Electric Program is managed by the Solar thermal and biomass Power division which is part of the Office of utility Technologies. The focus of the Program is to commercialize solar electric technologies. In this regard, three major projects are currently being pursued in trough, central receiver, and dish/Stirling electric power generation. This paper describes these three projects and the activities at the National laboratories that support them.

  16. National Solar Thermal Test Facility

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

    Stationary PowerEnergy Conversion EfficiencySolar EnergyConcentrating Solar Power (CSP)... The NSTTF's primary goal is to provide experimental engineering data for the design, ...

  17. Project Profile: National Solar Thermal Test Facility

    Broader source: Energy.gov [DOE]

    The first solar receivers ever tested in the world were tested at the National Solar Thermal Test Facility (NSTTF). The receivers were each rated up to 5 megawatts thermal (MWt). Receivers with various working fluids have been tested here over the years, including air, water-steam, molten salt, liquid sodium, and solid particles. The NSTTF has also been used for a large variety of other tests, including materials tests, simulation of thermal nuclear pulses and aerodynamic heating, and ablator testing for NASA.

  18. Modeling and Optimization of Hybrid Solar Thermoelectric Systems...

    Office of Scientific and Technical Information (OSTI)

    Sponsoring Org: USDOE SC Office of Basic Energy Sciences (SC-22) Country of Publication: United States Language: English Subject: solar (photovoltaic), solar (thermal), solid state ...

  19. Solar access of residential rooftops in four California cities...

    Office of Scientific and Technical Information (OSTI)

    Shadows cast by trees and buildings can limit the solar access of rooftop solar-energy systems, including photovoltaic panels and thermal collectors. This study characterizes ...

  20. Solar Junction Develops World Record Setting Concentrated Photovoltaic...

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

    the company's concentrated photovoltaic technology that also set a world record for conversion efficiency. The company's cell technology relies on inexpensive lenses to magnify...

  1. NREL's PV Incubator: Where Solar Photovoltaic Records Go to be...

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

    Alta Devices, Santa Clara, California - Alta Devices single-junction thin-film Gallium Arsenide (GaAs) photovoltaic technology recently achieved an NREL-confirmed world record ...

  2. Oncor Electric Delivery - Solar Photovoltaic Standard Offer Program...

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

    Summary Oncor Electric Delivery offers rebates to its customers that install photovoltaic (PV) systems on homes or other buildings.* Oncor customers of all rate classes...

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

    Open Energy Info (EERE)

    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...

  4. Novel Molten Salts Thermal Energy Storage for Concentrating Solar...

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

    Molten Salts Thermal Energy Storage for Concentrating Solar Power Generation Novel Molten Salts Thermal Energy Storage for Concentrating Solar Power Generation This presentation ...

  5. Resonant bonding leads to low lattice thermal conductivity (Journal...

    Office of Scientific and Technical Information (OSTI)

    Research Org: Energy Frontier Research Centers (EFRC); Solid-State Solar-Thermal Energy ... Country of Publication: United States Language: English Subject: solar (photovoltaic), ...

  6. EH AND S ANALYSIS OF DYE-SENSITIZED PHOTOVOLTAIC SOLAR CELL PRODUCTION.

    SciTech Connect (OSTI)

    BOWERMAN,B.; FTHENAKIS,V.

    2001-10-01

    Photovoltaic solar cells based on a dye-sensitized nanocrystalline titanium dioxide photoelectrode have been researched and reported since the early 1990's. Commercial production of dye-sensitized photovoltaic solar cells has recently been reported in Australia. In this report, current manufacturing methods are described, and estimates are made of annual chemical use and emissions during production. Environmental, health and safety considerations for handling these materials are discussed. This preliminary EH and S evaluation of dye-sensitized titanium dioxide solar cells indicates that some precautions will be necessary to mitigate hazards that could result in worker exposure. Additional information required for a more complete assessment is identified.

  7. California Solar Initiative- Solar Thermal Program

    Broader source: Energy.gov [DOE]

    '''''Note: This program was modified by AB 2249, signed in September 2012. The bill allows for non-residential solar pool heating to qualify for incentives, and requires program administrators to...

  8. Solar Thermal Collector Manufacturing Activities

    Gasoline and Diesel Fuel Update (EIA)

    7 Percent of solar thermal collector shipments by the 10 largest companies, 2000 - 2009 2000 1-5 7,521 90 6-10 567 7 2001 1-5 10,732 96 6-10 325 3 2002 1-5 10,755 92 6-10 670 6 2003 1-5 10,485 92 6-10 700 6 2004 1-5 13,291 94 6-10 664 5 2005 1-5 14,801 92 6-10 934 6 2006 1-5 18,535 89 6-10 1,484 7 2007 1-5 13,015 86 6-10 1,202 8 2008 1-5 14,023 83 6-10 1,453 9 2009 1-5 10,868 79 6-10 1,538 11 Year Company Rank Shipments (Thousand Square Feet) Percent of Total Shipments Source: U.S. Energy

  9. Solar Leasing for Residential Photovoltaic Systems (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-02-01

    This publication examines the solar lease option for residential PV systems and describes two solar lease programs already in place.

  10. Concentrating Solar Power Thermal Storage System Basics

    Broader source: Energy.gov [DOE]

    One challenge facing the widespread use of solar energy is reduced or curtailed energy production when the sun sets or is blocked by clouds. Thermal energy storage provides a workable solution to this challenge.

  11. Made in Minnesota Solar Thermal Rebate

    Broader source: Energy.gov [DOE]

    Beginning in 2014, the Department of Commerce is offering a Made in Minnesota Solar Thermal Rebate program, pursuant to H.F. 729 enacted in 2013. Rebates are 25% of installed costs, with a $2,500...

  12. Solar thermal power systems. Summary report

    SciTech Connect (OSTI)

    Not Available

    1980-06-01

    The work accomplished by the Aerospace Corporation from April 1973 through November 1979 in the mission analysis of solar thermal power systems is summarized. Sponsorship of this effort was initiated by the National Science Foundation, continued by the Energy Research and Development Administration, and most recently directed by the United States Department of Energy, Division of Solar Thermal Systems. Major findings and conclusions are sumarized for large power systems, small power systems, solar total energy systems, and solar irrigation systems, as well as special studies in the areas of energy storage, industrial process heat, and solar fuels and chemicals. The various data bases and computer programs utilized in these studies are described, and tables are provided listing financial and solar cost assumptions for each study. An extensive bibliography is included to facilitate review of specific study results and methodology.

  13. NREL: Photovoltaics Research - Potential of Perovskite Solar Cells Featured

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

    in Solar Today Potential of Perovskite Solar Cells Featured in Solar Today February 11, 2016 Familiar with perovskite solar cells? If not, you'll probably hear more about them soon. Perovskites are a family of materials receiving considerable attention by solar cell researchers due to the rapid rise of solar conversion efficiencies, increasing from about 4% to almost 22% in just six years. In an interview published in Solar Today (winter 2015 edition), Dr. Jao van de Lagemaat, director of

  14. Project Profile: Innovative Ballasted Flat Roof Solar Photovoltaic Racking System

    Broader source: Energy.gov [DOE]

    A 2010 Rocky Mountain Institute report estimated that structural systems alone cost about $0.95 per watt for rooftop installations. Cascade is developing a plastic-based photovoltaic (PV) racking...

  15. Integrated solar thermal energy collector system

    SciTech Connect (OSTI)

    Garrison, J.D.

    1987-08-18

    A solar thermal collector system is described one of a class of devices which converts solar radiation into heat and transmits this heat to storage from whence it is utilized, comprising: an evacuated glass solar collector, the evacuated glass solar collector having a glass vacuum envelope, the upper portion of the glass vacuum envelope also serving as window to pass solar radiation, the evacuated glass solar collector having a multiplicity of substantially parallel linear adjacent concentrating troughs, each trough shaped and mirror surfaced so as concentrate solar radiation in the vacuum, the mirror surface inside the vacuum and the concentration approximately ideal, the multiplicity of substantially parallel linear adjacent troughs extending substantially over the entire length and width of the evacuated glass solar collector; a heat storage system, the heat storage system adjacent to the evacuated glass solar collector, the heat storage system having a heat storage tank which is thermally insulated, the heat storage tank containing a heat storage medium, and the heat storage system including means of removal of heat from the heat storage tank for utilization.

  16. Milk, Eggs and Solar: Grocery Co-Op Puts Photovoltaics to Work

    Broader source: Energy.gov [DOE]

    Grocery shoppers in Burlington, Vt., are picking up much more than food and household items these days. Strolling the aisles of community-owned City Market, the 3,000 daily customers also learn about the co-op's 136 rooftop photovoltaic panels and monthly "Solar Made Simple" seminars.

  17. American Photovoltaics | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaics Jump to: navigation, search Logo: American Photovoltaics Name: American Photovoltaics Place: Houston, Texas Zip: 77002 Region: Texas Area Sector: Solar Product: Will...

  18. CT Solar Lease

    Broader source: Energy.gov [DOE]

    CT Solar Lease allows homeowners to lease a photovoltaic (PV) or solar thermal system, with fixed monthly payments, for a term of 20 years, at no upfront down payment.* This program, which takes...

  19. NREL Researchers Test Solar Thermal Technology

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

    A prototype heliostat which could take solar technology a step into the future is being tested at the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL). It was developed by Science Applications International Corporations (SAIC) Golden office. The heliostat is a large tracking mirror for use in solar thermal power plants. SAIC's prototype heliostat incorporates a number of design and manufacturing modifications that could lead to significant cost reductions. The major

  20. Solar Thermal Collector Manufacturing Activities - Energy Information

    Gasoline and Diesel Fuel Update (EIA)

    Administration Solar Thermal Manufacturing Activities Release Date: December 2010 | Next Release Date: Discontinued | full report Previous Issues Year: (PDF) 2009 2008 2007 2006 2005 2004 2003 1993 Go Overview Total shipments26 of solar thermal collectors decreased dramatically, falling from 17.0 million square feet in 2008 to 13.8 million square feet in 2009, a decline of almost 19 percent. Total shipments in 2009 were down 33 percent from the 2006 record level of 20.7 million square feet

  1. Photovoltaic Performance and Reliability Database: A Gateway to Experimental Data Monitoring Projects for PV at the Florida Solar Energy Center

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    This site is the gateway to experimental data monitoring projects for photovoltaic (PV) at the Florida Solar Energy Center. The website and the database were designed to facilitate and standardize the processes for archiving, analyzing and accessing data collected from dozens of operational PV systems and test facilities monitored by FSEC's Photovoltaics and Distributed Generation Division. [copied from http://www.fsec.ucf.edu/en/research/photovoltaics/data_monitoring/index.htm

  2. Residential Solar Photovoltaics: Comparison of Financing Benefits, Innovations, and Options

    SciTech Connect (OSTI)

    Speer, B.

    2012-10-01

    This report examines relatively new, innovative financing methods for residential photovoltaics (PV) and compares them to traditional self-financing. It provides policymakers with an overview of the residential PV financing mechanisms, describes relative advantages and challenges, and analyzes differences between them where data is available. Because these innovative financing mechanisms have only been implemented in a few locations, this report can inform their wider adoption.

  3. National Solar Thermal Test Facility

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

    2 - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle Defense Waste Management Programs Advanced Nuclear Energy Nuclear

  4. National Solar Thermal Test Facility

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

    3 - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle Defense Waste Management Programs Advanced Nuclear Energy Nuclear

  5. Photovoltaic

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

    Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power ... monitoring of large quantities of data can be cumbersome for the individual analyst. ...

  6. Prediction of global solar irradiance based on time series analysis: Application to solar thermal power plants energy production planning

    SciTech Connect (OSTI)

    Martin, Luis; Marchante, Ruth; Cony, Marco; Zarzalejo, Luis F.; Polo, Jesus; Navarro, Ana

    2010-10-15

    Due to strong increase of solar power generation, the predictions of incoming solar energy are acquiring more importance. Photovoltaic and solar thermal are the main sources of electricity generation from solar energy. In the case of solar thermal energy plants with storage energy system, its management and operation need reliable predictions of solar irradiance with the same temporal resolution as the temporal capacity of the back-up system. These plants can work like a conventional power plant and compete in the energy stock market avoiding intermittence in electricity production. This work presents a comparisons of statistical models based on time series applied to predict half daily values of global solar irradiance with a temporal horizon of 3 days. Half daily values consist of accumulated hourly global solar irradiance from solar raise to solar noon and from noon until dawn for each day. The dataset of ground solar radiation used belongs to stations of Spanish National Weather Service (AEMet). The models tested are autoregressive, neural networks and fuzzy logic models. Due to the fact that half daily solar irradiance time series is non-stationary, it has been necessary to transform it to two new stationary variables (clearness index and lost component) which are used as input of the predictive models. Improvement in terms of RMSD of the models essayed is compared against the model based on persistence. The validation process shows that all models essayed improve persistence. The best approach to forecast half daily values of solar irradiance is neural network models with lost component as input, except Lerida station where models based on clearness index have less uncertainty because this magnitude has a linear behaviour and it is easier to simulate by models. (author)

  7. Sustainable Energy Resources for Consumers (SERC) - Solar Photovoltaic...

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

    Energy Future www.oregon.govENERGYRENEWSolardocsSunChart.pdf Sun Chart Solar Access Shading analysis prior to installation (remember - small trees grow into tall trees) ...

  8. Nationwide Analysis of U.S. Commercial Building Solar Photovoltaic...

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

    of breakeven prices than is variation in building load or solar generation profiles. vi This report is available at no cost from the National Renewable Energy Laboratory...

  9. List of Solar Thermal Electric Incentives | Open Energy Information

    Open Energy Info (EERE)

    List of Solar Thermal Electric Incentives Jump to: navigation, search The following contains the list of 562 Solar Thermal Electric Incentives. CSV (rows 1-500) CSV (rows 501-562)...

  10. Simulating the Value of Concentrating Solar Power with Thermal...

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

    Simulating the Value of Concentrating Solar Power with Thermal Energy Storage in a ... DE-AC36-08GO28308 Simulating the Value of Concentrating Solar Power with Thermal Energy ...

  11. Increasing the solar photovoltaic energy capture on sunny and cloudy days

    SciTech Connect (OSTI)

    Kelly, Nelson A.; Gibson, Thomas L.

    2011-01-15

    This report analyzes an extensive set of measurements of the solar irradiance made using four identical solar arrays and associated solar sensors (collectively referred to as solar collectors) with different tilt angles relative to the earth's surface, and thus the position of the sun, in order to determine an optimal tracking algorithm for capturing solar radiation. The study included a variety of ambient conditions including different seasons and both cloudy and cloud-free conditions. One set of solar collectors was always approximately pointed directly toward the sun (DTS) for a period around solar noon. These solar collectors thus captured the direct beam component of the solar radiation that predominates on sunny days. We found that on sunny days, solar collectors with a DTS configuration captured more solar energy in accordance with the well-known cosine dependence for the response of a flat-surfaced solar collector to the angle of incidence with direct beam radiation. In particular, a DTS orientation was found to capture up to twice as much solar energy as a horizontal (H) orientation in which the array is tilted toward the zenith. Another set of solar collectors always had an H orientation, and this best captured the diffuse component of the solar radiation that predominates on cloudy days. The dependence of the H/DTS ratio on the solar-collector tilt angle was in approximate agreement with the Isotropic Diffuse Model derived for heavily overcast conditions. During cloudy periods, we found that an H configuration increased the solar energy capture by nearly 40% compared to a DTS configuration during the same period, and we estimate the solar energy increase of an H configuration over a system that tracks the obscured solar disk could reach 50% over a whole heavily-overcast day. On an annual basis the increase is predicted to be much less, typically only about 1%, because the contribution of cloudy days to the total annual solar energy captured by a photovoltaic system is small. These results are consistent with the solar tracking algorithm optimized for cloudy conditions that we proposed in an earlier report and that was based on a much smaller data set. Improving the harvesting of solar energy on cloudy days deserves wider attention due to increasing efforts to utilize renewable solar energy. In particular, increasing the output of distributed solar power systems on cloudy days is important to developing solar-powered home fueling and charging systems for hydrogen-powered fuel-cell electric and battery-powered vehicles, respectively, because it reduces the system size and cost for solar power systems that are designed to have sufficient energy output on the worst (cloudy) days. (author)

  12. Ligitek Photovoltaic | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaic Jump to: navigation, search Name: Ligitek Photovoltaic Place: Taiwan Sector: Solar Product: Ligitek solar is a fully owned subsidiary of Ligitek Electronics, that will...

  13. Sandia and EMCORE: Solar Photovoltaics, Fiber Optics, MODE, and...

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

    ... In June 2009, EMCORE signed an agreement with the Public Service Company of New Mexico (PNM) to become the first company to join PNM's Distributed Energy Solar Power Program. The ...

  14. Converting solar-photovoltaic power into exportable products

    SciTech Connect (OSTI)

    Oman, H.

    1997-12-31

    Nations, states, and even communities must generate exportable products that earn money for buying needed imports. Exports have ranged from tourist services to hardwood logs. Fertile land, with irrigation water and fertilizer, grows exportable food. On the other hand a hot dry desert with no mineral resources presents a challenge to its occupants. Solar power could be generated and exported, but that requires construction of expensive transmission lines which are in service only when the sun shines. Among new options is a solar-powered plant that recovers zinc from the zinc oxide produced during discharge of zinc-air electric-vehicle batteries. A hectare-size solar-power plant with 30-percent efficient solar cells can in eight hours recover enough zinc to power 36,000 /km (22,000 miles) of travel in lightweight 4-passenger electric vehicles. A by-product could be renewable fuel for use by local residents in electric bicycles. One oriented solar panel, 10 meters by 10 meters in size, with 30-percent efficient solar cells, could in one day deliver enough energy for traveling 14,700 km (9176 miles) on bicycles. This by far exceeds the travel distance that could be obtained in one day by riding on an animal that is pastured on a s0-by-10 meter area.

  15. Chapter 1.03: Solar Photovoltaics Technology: No Longer an Outlier

    SciTech Connect (OSTI)

    Kazmerski, L. L.

    2012-01-01

    The status and future technology, market, and industry opportunities for solar photovoltaics are examined and discussed. The co-importance of both policy and technology investments for the future markets and competitiveness of this solar approach is emphasized. This paper underscores the technology side, with a comprehensive overview and insights to technical, policy, market, industry and other investments needed to tip photovoltaics to its next level of contribution as a significant clean-energy partner in the world energy economy. The requirement to venture from near-term and evolutionary approaches into disruptive and revolutionary technology pathways is argued for our needs in the mid-term (the next 10-15 years) and the long-term (beyond the first quarter of this century).

  16. Proceedings of the flat-plate solar array project research forum on photovoltaic metallization systems

    SciTech Connect (OSTI)

    1983-11-15

    A Photovoltaic Metallization Research Forum, under the sponsorship of the Jet Propulsion Laboratory's Flat-Plate Solar Array Project and the US Department of Energy, was held March 16-18, 1983 at Pine Mountain, Georgia. The Forum consisted of five sessions, covering (1) the current status of metallization systems, (2) system design, (3) thick-film metallization, (4) advanced techniques and (5) future metallization challenges. Twenty-three papers were presented.

  17. Banking on Solar: An Analysis of Banking Opportunities in the U.S. Distributed Photovoltaic Market

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

    Banking on Solar: An Analysis of Banking Opportunities in the U.S. Distributed Photovoltaic Market David Feldman and Travis Lowder National Renewable Energy Laboratory Technical Report NREL/TP-6A20-62605 November 2014 NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency & Renewable Energy Operated by the Alliance for Sustainable Energy, LLC This report is available at no cost from the National Renewable Energy Laboratory (NREL) at

  18. 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

  19. Incorporation of NREL Solar Advisor Model Photovoltaic Capabilities with GridLAB-D

    SciTech Connect (OSTI)

    Tuffner, Francis K.; Hammerstrom, Janelle L.; Singh, Ruchi

    2012-10-19

    This report provides a summary of the work updating the photovoltaic model inside GridLAB-D. The National Renewable Energy Laboratory Solar Advisor Model (SAM) was utilized as a basis for algorithms and validation of the new implementation. Subsequent testing revealed that the two implementations are nearly identical in both solar impacts and power output levels. This synergized model aides the system-level impact studies of GridLAB-D, but also allows more specific details of a particular site to be explored via the SAM software.

  20. Solar Photovoltaic Economic Development: Building and Growing a Local PV Industry, August 2011 (Book)

    SciTech Connect (OSTI)

    Not Available

    2011-08-01

    The U.S. photovoltaic (PV) industry is forecast to grow, and it represents an opportunity for economic development and job creation in communities throughout the United States. This report helps U.S. cities evaluate economic opportunities in the PV industry. It serves as a guide for local economic development offices in evaluating their community?s competitiveness in the solar PV industry, assessing the viability of solar PV development goals, and developing strategies for recruiting and retaining PV companies to their areas.

  1. Light-splitting photovoltaic system utilizing two dual-junction solar cells

    SciTech Connect (OSTI)

    Xiong, Kanglin; Yang, Hui; Lu, Shulong; Dong, Jianrong; Zhou, Taofei; Wang, Rongxin; Jiang, Desheng

    2010-12-15

    There are many difficulties limiting the further development of monolithic multi-junction solar cells, such as the growth of lattice-mismatched material and the current matching constraint. As an alternative approach, the light-splitting photovoltaic system is investigated intensively in different aspects, including the energy loss mechanism and the choice of energy bandgaps of solar cells. Based on the investigation, a two-dual junction system has been implemented employing lattice-matched GaInP/GaAs and InGaAsP/InGaAs cells grown epitaxially on GaAs and InP substrates, respectively. (author)

  2. Thermal Reliability Study of Bypass Diodes in Photovoltaic Modules (Poster)

    SciTech Connect (OSTI)

    Zhang, Z.; Wohlgemuth, J.; Kurtz, S.

    2013-05-01

    This paper presents the result of high-temperature durability and thermal cycling testing and analysis for the selected diodes to study the detail of the thermal design and relative long-term reliability of the bypass diodes used to limit the detrimental effects of module hot-spot susceptibility.

  3. Science Highlights- Center for Solar and Thermal Energy Conversion

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

    2 - Abstracts and Highlight Slides Energy Level Modulation in Conjugated Polymers for Organic Photovoltaic Applications Aligning Carbon Nanotubes (CNTs) Using Ultrafast Laser Irradiation Disordered Interfaces Improve Organic Photovoltaics New Way of Reducing Thermal Conductivity in Thermoelectric Materials Phase-field Simulations of GaN/InGaN Quantum Dot Growth by Selective Area Epitaxy High Performance Thermoelectricity in Earth-Abundant Compounds Based on Natural Mineral Tetrahedrites Effect

  4. Science Highlights- Center for Solar and Thermal Energy Conversion

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

    3 - Abstracts and Highlight Slides Improving Thermoelectric Efficiency via Low Thermal Boundary Conductance Reduction of Open Circuit Voltage Loss in a Polymer Photovoltaic Cell via Interfacial Molecular Design Mechanisms of Quantum Dot Formation During Annealing of Metallic Islands Improved Measurements of Ultrafast Pulses of Light Recovering Lost Excitons in Organic Photovoltaics using a Transparent Dissociation Layer A Predictive approach for Calculating Electron Charge Transfer within

  5. Analysis of Web Based Solar Photovoltaic Mapping Tools

    Broader source: Energy.gov [DOE]

    A PV mapping tool visually represents a specific site and calculates PV system size and projected electricity production. This report identifies the commercially available solar mapping tools and thoroughly summarizes the source data type and resolution, the visualization software program being used, user inputs, calculation methodology and algorithms, map outputs, and development costs for each map.

  6. Selecting Solar. Insights into Residential Photovoltaic (PV) Quote Variation

    SciTech Connect (OSTI)

    Davidson, Carolyn; Margolis, Robert

    2015-10-01

    This analysis leverages available data from EnergySage, an online solar marketplace, to offer the first data-driven characterization of quote variation faced by prospective PV customers, lending early insight into the decisions customers face once they have initial buy-in.

  7. Letting the Sun Shine on Solar Costs: An Empirical Investigation of Photovoltaic Cost Trends in California

    SciTech Connect (OSTI)

    Wiser, R.; Bolinger, M.; Cappers, P.; Margolis, R.

    2006-01-01

    This report provides a comprehensive analysis of grid-connected solar photovoltaic (PV) cost trends in California, which is by far the largest PV market in the United States. The findings of this work may help stakeholders to understand important trends in the California PV market, and policymakers to design more effective solar incentive programs--a particularly important objective given the recent announcement from the California Public Utilities Commission (CPUC) to establish an 11-year, $3.2 billion incentive program for customer-sited solar. The study statistically analyzes the installed cost of grid-connected PV systems funded by the state's two largest solar rebate programs, overseen by the California Energy Commission (CEC) [operating since 1998] and the CPUC [operating since 2001].

  8. Deconstructing Solar Photovoltaic Pricing: The Role of Market Structure, Technology and Policy

    Broader source: Energy.gov [DOE]

    Solar photovoltaic (PV) system prices in the United States are considerably different both across geographic locations and within a given location. Variances in price may arise due to state and federal policies, differences in market structure, and other factors that influence demand and costs. This paper examines the relative importance of such factors on the stability of solar PV system prices in the United States using a detailed dataset of roughly 100,000 recent residential and small commercial installations. The paper finds that PV system prices differ based on characteristics of the systems. More interestingly, evidence suggests that search costs and imperfect competition affect solar PV pricing. Installer density substantially lowers prices, while regions with relatively generous financial incentives for solar PV are associated with higher prices.

  9. Photovoltaic

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

    2 - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle Defense Waste Management Programs Advanced Nuclear Energy Nuclear

  10. Photovoltaic

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

    3 - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle Defense Waste Management Programs Advanced Nuclear Energy Nuclear

  11. Solar Photovoltaic Cell/Module Shipments - Energy Information

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

    Administration Renewable & Alternative Fuels Glossary › FAQS › Overview Data Summary Biomass Geothermal Hydropower Solar Wind Alternative transportation fuels All renewable & alternative fuels data reports Analysis & Projections Major Topics Most popular Alternative Fuels Capacity and generation Consumption Environment Industry Characteristics Prices Production Projections Recurring Renewable energy type All reports Browse by Tag Alphabetical Frequency Tag Cloud ‹ See All

  12. Solar Photovoltaic Financing: Deployment by Federal Government Agencies

    SciTech Connect (OSTI)

    Cory, K.; Coggeshall, C.; Coughlin, J.; Kreycik, C.

    2009-07-01

    The goal of this report is to examine how federal agencies can finance on-site PV projects. It explains state-level cash incentives available, the importance of solar renewable energy certificate revenues (in certain markets), existing financing structures, as well as innovative financing structures being used by federal agencies to deploy on-site PV. Specific examples from the DOD, DOE, and other federal agencies are highlighted to explain federal project financing in detail.

  13. Science Highlights- Center for Solar and Thermal Energy Conversion

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

    Highlight Slides Abstracts (Click on Title) and Science Highlight Slides (Click on Image) Highlights From 2014 Comparison of Ultrafast Pulse Measurement Methods Low-temperature Physical Properties of Cu2Se Modeling the Role of Donor/Acceptor Interface in Charge Transfer in SubPc/C60-based Solar Cells Universal Design Principles for Cascade Heterojunction Solar Cells with High Fill Factors and Internal Quantum Efficiencies Approaching 100% Exciton Management in Organic Photovoltaic Multi-donor

  14. Evaluation of phase change materials for thermal regulation enhancement of building integrated photovoltaics

    SciTech Connect (OSTI)

    Hasan, A.; Norton, B.; McCormack, S.J.; Huang, M.J.

    2010-09-15

    Regulating the temperature of building integrated photovoltaics (BIPV) using phase change materials (PCMs) reduces the loss of temperature dependent photovoltaic (PV) efficiency. Five PCMs were selected for evaluation all with melting temperatures {proportional_to}25 {+-} 4 C and heat of fusion between 140 and 213 kJ/kg. Experiments were conducted at three insolation intensities to evaluate the performance of each PCM in four different PV/PCM systems. The effect on thermal regulation of PV was determined by changing the (i) mass of PCM and (ii) thermal conductivities of the PCM and PV/PCM system. A maximum temperature reduction of 18 C was achieved for 30 min while 10 C temperature reduction was maintained for 5 h at -1000 W/m{sup 2} insolation. (author)

  15. Selecting Solar: Insights into Residential Photovoltaic (PV) Quote Variation

    SciTech Connect (OSTI)

    Davidson, Carolyn; Margolis, Robert

    2015-10-01

    Before investing in a system, a prospective PV customer must not only have initial concept 'buy in,' but also be able to evaluate the tradeoffs associated with different system parameters. Prospective customers might need to evaluate disparate costs for each system attribute by comparing multiple bids. The difficulty of making such an evaluation with limited information can create a cognitive barrier to proceeding with the investment. This analysis leverages recently available data from EnergySage, an online solar marketplace, to offer the first data-driven characterization of quote variation faced by prospective PV customers, lending early insight into the decisions customers face once they have initial buy-in.

  16. SolarTile: A rooftop integrated photovoltaic system. Phase 1, final report

    SciTech Connect (OSTI)

    1998-03-26

    AstroPower, Royal Group Technologies, and Solar Design Associates are jointly developing an integrated photovoltaic roofing system for residential and light commercial building applications. This family of products will rely heavily on the technological development of a roofing tile made from recycled plastic and innovative module fabrication and encapsulation processes in conjunction with an advanced Silicon-Film{trademark} solar cell product. This solar power generating roofing product is presently being referred to as the SolarTile. A conceptual drawing of the solar roofing tile is shown. The SolarTile will be integrated with non-solar tiles in a single roof installation permitting ease of assembly and the ability to use conventional roofing techniques at ridges, valleys, and eaves. The Phase 1 effort included tasks aimed at the development of the proposed product concept; product manufacturing or fabrication, and installation cost estimates; business planning; and a market assessment of the proposed product, including target selling prices, target market sectors, size estimates for each market sector, and planned distribution mechanisms for market penetration. Technical goals as stated in the Phase 1 proposal and relevant progress are reported.

  17. Photovoltaic Technology Basics | Department of Energy

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

    Solar Photovoltaic Technology Basics Photovoltaic Technology Basics August 16, 2013 - 4:47pm Addthis Text Version Photovoltaic (PV) materials and devices convert sunlight into ...

  18. Concentrator Photovoltaic System Basics | Department of Energy

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

    Concentrator Photovoltaic System Basics Concentrator Photovoltaic System Basics August 20, 2013 - 4:12pm Addthis Concentrator photovoltaic (PV) systems use less solar cell material ...

  19. 2009 Technical Risk and Uncertainty Analysis of the U.S. Department of Energy's Solar Energy Technologies Program Concentrating Solar Power and Photovoltaics R&D

    SciTech Connect (OSTI)

    McVeigh, J.; Lausten, M.; Eugeni, E.; Soni, A.

    2010-11-01

    The U.S. Department of Energy (DOE) Solar Energy Technologies Program (SETP) conducted a 2009 Technical Risk and Uncertainty Analysis to better assess its cost goals for concentrating solar power (CSP) and photovoltaic (PV) systems, and to potentially rebalance its R&D portfolio. This report details the methodology, schedule, and results of this technical risk and uncertainty analysis.

  20. Feasibility Study of Solar Photovoltaics on Landfills in Puerto Rico (Second Study)

    SciTech Connect (OSTI)

    Salasovich, J.; Mosey, G.

    2011-08-01

    This report presents the results of an assessment of the technical and economic feasibility of deploying a solar photovoltaics (PV) system on landfill sites in Puerto Rico. The purpose of this report is to assess the landfills with the highest potential for possible solar PV installation and estimate cost, performance, and site impacts of three different PV options: crystalline silicon (fixed tilt), crystalline silicon (single-axis tracking), and thin film (fixed tilt). The report outlines financing options that could assist in the implementation of a system. According to the site production calculations, the most cost-effective system in terms of return on investment is the thin-film fixed-tilt technology. The report recommends financing options that could assist in the implementation of such a system. The landfills and sites considered in this report were all determined feasible areas in which to implement solar PV systems.

  1. Solar energy education. Renewable energy activities for general science

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

  2. NREL: Concentrating Solar Power Research - Parabolic Trough Thermal...

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

    of solar power Help reduce the cost of solar electricity. Parabolic trough technology currently has one thermal energy storage option-a two-tank, indirect, molten-salt system. ...

  3. Low-cost, Modular, Building-integrated Photovoltaic-Thermal Collector...

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

    However, in order to achieve net-zero energy use, solar thermal collectors are often required to produce hot water for domestic and space heating needs or pre-heated ventilation ...

  4. Fast All-sky Radiation Models for Solar applications (FARMS) - Energy

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

    Innovation Portal Solar Thermal Solar Thermal Solar Photovoltaic Solar Photovoltaic Energy Analysis Energy Analysis Find More Like This Return to Search Fast All-sky Radiation Models for Solar applications (FARMS) National Renewable Energy Laboratory Contact NREL About This Technology Technology Marketing Summary Radiative transfer (RT) models simulating broadband solar radiation have been widely used by atmospheric scientists to model solar resources for various energy applications such as

  5. Thermal model of solar absorption HVAC systems

    SciTech Connect (OSTI)

    Bergquam, J.B.; Brezner, J.M.

    1995-11-01

    This paper presents a thermal model that describes the performance of solar absorption HVAC systems. The model considers the collector array, the building cooling and heating loads, the absorption chiller and the high temperature storage. Heat losses from the storage tank and piping are included in the model. All of the results presented in the paper are for an array of flat plate solar collectors with black chrome (selective surface) absorber plates. The collector efficiency equation is used to calculate the useful heat output from the array. The storage is modeled as a non-stratified tank with polyurethane foam insulation. The system is assumed to operate continuously providing air conditioning during the cooling season, space heating during the winter and hot water throughout the year. The amount of heat required to drive the chiller is determined from the coefficient of performance of the absorption cycle. Results are presented for a typical COP of 0.7. The cooling capacity of the chiller is a function of storage (generator) temperature. The nominal value is 190 F (88 C) and the range of values considered is 180 F (82 C) to 210 F (99 C). Typical building cooling and heating loads are determined as a function of ambient conditions. Performance results are presented for Sacramento, CA and Washington, D.C. The model described in the paper makes use of National Solar Radiation Data Base (NSRDB) data and results are presented for these two locations. The uncertainties in the NSRDB are estimated to be in a range of 6% to 9%. This is a significant improvement over previously available data. The model makes it possible to predict the performance of solar HVAC systems and calculate quantities such as solar fraction, storage temperature, heat losses and parasitic power for every hour of the period for which data are available.

  6. Photovoltaic properties and morphology of organic solar cells based on liquid-crystal semiconducting polymer with additive

    SciTech Connect (OSTI)

    Suzuki, Atsushi; Zushi, Masahito; Suzuki, Hisato; Ogahara, Shinichi; Akiyama, Tsuyoshi; Oku, Takeo

    2014-02-20

    Bulk heterojunction organic solar cell based on liquid crystal semiconducting polymers of poly[9,9-dioctylfluorene-co-bithiophene] (F8T2) as p-type semiconductors and fullerenes (C{sub 60}) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as electron donor and acceptor has been fabricated and characterized for improving photovoltaic and optical properties. The photovoltaic performance including current voltage curves in the dark and illumination of the F8T2/C{sub 60} conventional and inverted bulk heterojunction solar cells were investigated. Relationship between the photovoltaic properties and morphological behavior was focused on tuning for optimization of photo-voltaic performance under annealing condition near glass transition temperature. Additive-effect of diiodooctane (DIO) and poly(3-hexylthiophene-2,5-diyl) (P3HT) on the photovoltaic performance and optical properties was investigated. Mechanism of the photovoltaic properties of the conventional and inverted solar cells will be discussed by the experimental results.

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

    SciTech Connect (OSTI)

    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.

  8. Utility-Scale Concentrating Solar Power and Photovoltaic Projects: A Technology and Market Overview

    SciTech Connect (OSTI)

    Mendelsohn, M.; Lowder, T.; Canavan, B.

    2012-04-01

    Over the last several years, solar energy technologies have been, or are in the process of being, deployed at unprecedented levels. A critical recent development, resulting from the massive scale of projects in progress or recently completed, is having the power sold directly to electric utilities. Such 'utility-scale' systems offer the opportunity to deploy solar technologies far faster than the traditional 'behind-the-meter' projects designed to offset retail load. Moreover, these systems have employed significant economies of scale during construction and operation, attracting financial capital, which in turn can reduce the delivered cost of power. This report is a summary of the current U.S. utility-scale solar state-of-the-market and development pipeline. Utility-scale solar energy systems are generally categorized as one of two basic designs: concentrating solar power (CSP) and photovoltaic (PV). CSP systems can be further delineated into four commercially available technologies: parabolic trough, central receiver (CR), parabolic dish, and linear Fresnel reflector. CSP systems can also be categorized as hybrid, which combine a solar-based system (generally parabolic trough, CR, or linear Fresnel) and a fossil fuel energy system to produce electric power or steam.

  9. Statistical Characterization of Solar Photovoltaic Power Variability at Small Timescales: Preprint

    SciTech Connect (OSTI)

    Shedd, S.; Hodge, B.-M.; Florita, A.; Orwig, K.

    2012-08-01

    Integrating large amounts of variable and uncertain solar photovoltaic power into the electricity grid is a growing concern for power system operators in a number of different regions. Power system operators typically accommodate variability, whether from load, wind, or solar, by carrying reserves that can quickly change their output to match the changes in the solar resource. At timescales in the seconds-to-minutes range, this is known as regulation reserve. Previous studies have shown that increasing the geographic diversity of solar resources can reduce the short term-variability of the power output. As the price of solar has decreased, the emergence of very large PV plants (greater than 10 MW) has become more common. These plants present an interesting case because they are large enough to exhibit some spatial smoothing by themselves. This work examines the variability of solar PV output among different arrays in a large ({approx}50 MW) PV plant in the western United States, including the correlation in power output changes between different arrays, as well as the aggregated plant output, at timescales ranging from one second to five minutes.

  10. Sandia Energy - Sandia-AREVA Commission Solar Thermal/Molten...

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

    Sandia-AREVA Commission Solar ThermalMolten Salt Energy-Storage Demonstration Home Renewable Energy Energy Facilities Partnership Capabilities News SunShot News & Events...

  11. Parabolic Trough Solar Thermal Electric Power Plants (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2006-07-01

    This fact sheet provides an overview of the potential for parabolic trough solar thermal electric power plants, especially in the Southwestern U.S.

  12. Feasibility Study of Economics and Performance of Solar Photovoltaics in Nitro, West Virginia

    SciTech Connect (OSTI)

    Lisell, L.; Mosey, G.

    2010-08-01

    The study described in this report assessed brownfield sites designated by the City of Nitro, West Virginia for solar photovoltaic (PV) installations. The study analyzed three different types of PV systems for eight sites. The report estimates the cost, performance, and site impacts of thin film technology and crystalline silicon panels (both fixed-axis tracking and single-axis tracking systems). Potential job creation and electrical rate increases were also considered, and the report recommends financing options that could assist in the implementation of a system.

  13. Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-06-01

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  14. Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    DOE Solar Energy Technologies Program

    2011-06-27

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  15. Solar Energy Partners | Open Energy Information

    Open Energy Info (EERE)

    Zip: W1K 4ND Sector: Solar Product: London-based firm active in investments in photovoltaic and thermal solar energy projects for pension funds, private equity, specialist...

  16. Solar Thermal Energy Storage Device: Hybrid Nanostructures for High-Energy-Density Solar Thermal Fuels

    SciTech Connect (OSTI)

    2012-01-09

    HEATS Project: MIT is developing a thermal energy storage device that captures energy from the sun; this energy can be stored and released at a later time when it is needed most. Within the device, the absorption of sunlight causes the solar thermal fuels photoactive molecules to change shape, which allows energy to be stored within their chemical bonds. A trigger is applied to release the stored energy as heat, where it can be converted into electricity or used directly as heat. The molecules would then revert to their original shape, and can be recharged using sunlight to begin the process anew. MITs technology would be 100% renewable, rechargeable like a battery, and emissions-free. Devices using these solar thermal fuelscalled Hybrisolcan also be used without a grid infrastructure for applications such as de-icing, heating, cooking, and water purification.

  17. Solar Thermal Success Stories - Energy Innovation Portal

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

    of Energy Solar Ready Vets: Preparing Veterans for the Solar Workforce Solar Ready Vets: Preparing Veterans for the Solar Workforce Addthis Description Solar Ready Vets, created by the Department of Energy's SunShot Initiative, connects our nation's transitioning veterans to the growing solar energy industry. As these active duty service members prepare to enter the civilian world, the Solar Ready Vets program offers them the opportunity to learn about all aspects of the solar industry in a

  18. Variability of Photovoltaic Power in the State of Gujarat Using High Resolution Solar Data

    SciTech Connect (OSTI)

    Hummon, M.; Cochran, J.; Weekley, A.; Lopez, A.; Zhang, J.; Stoltenberg, B.; Parsons, B.; Batra, P.; Mehta, B.; Patel, D.

    2014-03-01

    India has ambitious goals for high utilization of variable renewable power from wind and solar, and deployment has been proceeding at a rapid pace. The western state of Gujarat currently has the largest amount of solar generation of any Indian state, with over 855 Megawatts direct current (MWDC). Combined with over 3,240 MW of wind, variable generation renewables comprise nearly 18% of the electric-generating capacity in the state. A new historic 10-kilometer (km) gridded solar radiation data set capturing hourly insolation values for 2002-2011 is available for India. We apply an established method for downscaling hourly irradiance data to one-minute irradiance data at potential PV power production locations for one year, 2006. The objective of this report is to characterize the intra-hour variability of existing and planned photovoltaic solar power generation in the state of Gujarat (a total of 1.9 gigawatts direct current (GWDC)), and of five possible expansion scenarios of solar generation that reflect a range of geographic diversity (each scenario totals 500-1,000 MW of additional solar capacity). The report statistically analyzes one year's worth of power variability data, applied to both the baseline and expansion scenarios, to evaluate diurnal and seasonal power fluctuations, different timescales of variability (e.g., from one to 15 minutes), the magnitude of variability (both total megawatts and relative to installed solar capacity), and the extent to which the variability can be anticipated in advance. The paper also examines how Gujarat Energy Transmission Corporation (GETCO) and the Gujarat State Load Dispatch Centre (SLDC) could make use of the solar variability profiles in grid operations and planning.

  19. Office of Legacy Management Decision Tree for Solar Photovoltaic Projects - 13317

    SciTech Connect (OSTI)

    Elmer, John; Butherus, Michael; Barr, Deborah L.

    2013-07-01

    To support consideration of renewable energy power development as a land reuse option, the DOE Office of Legacy Management (LM) and the National Renewable Energy Laboratory (NREL) established a partnership to conduct an assessment of wind and solar renewable energy resources on LM lands. From a solar capacity perspective, the larger sites in the western United States present opportunities for constructing solar photovoltaic (PV) projects. A detailed analysis and preliminary plan was developed for three large sites in New Mexico, assessing the costs, the conceptual layout of a PV system, and the electric utility interconnection process. As a result of the study, a 1,214-hectare (3,000-acre) site near Grants, New Mexico, was chosen for further study. The state incentives, utility connection process, and transmission line capacity were key factors in assessing the feasibility of the project. LM's Durango, Colorado, Disposal Site was also chosen for consideration because the uranium mill tailings disposal cell is on a hillside facing south, transmission lines cross the property, and the community was very supportive of the project. LM worked with the regulators to demonstrate that the disposal cell's long-term performance would not be impacted by the installation of a PV solar system. A number of LM-unique issues were resolved in making the site available for a private party to lease a portion of the site for a solar PV project. A lease was awarded in September 2012. Using a solar decision tree that was developed and launched by the EPA and NREL, LM has modified and expanded the decision tree structure to address the unique aspects and challenges faced by LM on its multiple sites. The LM solar decision tree covers factors such as land ownership, usable acreage, financial viability of the project, stakeholder involvement, and transmission line capacity. As additional sites are transferred to LM in the future, the decision tree will assist in determining whether a solar PV project is feasible on the new sites. (authors)

  20. Variability of Power from Large-Scale Solar Photovoltaic Scenarios in the State of Gujarat: Preprint

    SciTech Connect (OSTI)

    Parsons, B.; Hummon, M.; Cochran, J.; Stoltenberg, B.; Batra, P.; Mehta, B.; Patel, D.

    2014-04-01

    India has ambitious goals for high utilization of variable renewable power from wind and solar, and deployment has been proceeding at a rapid pace. The western state of Gujarat currently has the largest amount of solar generation of any Indian state, with over 855 Megawatts direct current (MWDC). Combined with over 3,240 MW of wind, variable generation renewables comprise nearly 18% of the electric-generating capacity in the state. A new historic 10-kilometer (km) gridded solar radiation data set capturing hourly insolation values for 2002-2011 is available for India. We apply an established method for downscaling hourly irradiance data to one-minute irradiance data at potential PV power production locations for one year, 2006. The objective of this report is to characterize the intra-hour variability of existing and planned photovoltaic solar power generation in the state of Gujarat (a total of 1.9 gigawatts direct current (GWDC)), and of five possible expansion scenarios of solar generation that reflect a range of geographic diversity (each scenario totals 500-1,000 MW of additional solar capacity). The report statistically analyzes one year's worth of power variability data, applied to both the baseline and expansion scenarios, to evaluate diurnal and seasonal power fluctuations, different timescales of variability (e.g., from one to 15 minutes), the magnitude of variability (both total megawatts and relative to installed solar capacity), and the extent to which the variability can be anticipated in advance. The paper also examines how Gujarat Energy Transmission Corporation (GETCO) and the Gujarat State Load Dispatch Centre (SLDC) could make use of the solar variability profiles in grid operations and planning.

  1. Variability of Power from Large-Scale Solar Photovoltaic Scenarios in the State of Gujarat (Presentation)

    SciTech Connect (OSTI)

    Parsons, B.; Hummon, M.; Cochran, J.; Stoltenberg, B.; Batra, P.; Mehta, B.; Patel, D.

    2014-04-01

    India has ambitious goals for high utilization of variable renewable power from wind and solar, and deployment has been proceeding at a rapid pace. The western state of Gujarat currently has the largest amount of solar generation of any Indian state, with over 855 Megawatts direct current (MWDC). Combined with over 3,240 MW of wind, variable generation renewables comprise nearly 18% of the electric-generating capacity in the state. A new historic 10-kilometer (km) gridded solar radiation data set capturing hourly insolation values for 2002-2011 is available for India. We apply an established method for downscaling hourly irradiance data to one-minute irradiance data at potential PV power production locations for one year, 2006. The objective of this report is to characterize the intra-hour variability of existing and planned photovoltaic solar power generation in the state of Gujarat (a total of 1.9 gigawatts direct current (GWDC)), and of five possible expansion scenarios of solar generation that reflect a range of geographic diversity (each scenario totals 500-1,000 MW of additional solar capacity). The report statistically analyzes one year's worth of power variability data, applied to both the baseline and expansion scenarios, to evaluate diurnal and seasonal power fluctuations, different timescales of variability (e.g., from one to 15 minutes), the magnitude of variability (both total megawatts and relative to installed solar capacity), and the extent to which the variability can be anticipated in advance. The paper also examines how Gujarat Energy Transmission Corporation (GETCO) and the Gujarat State Load Dispatch Centre (SLDC) could make use of the solar variability profiles in grid operations and planning.

  2. Nationwide Analysis of U.S. Commercial Building Solar Photovoltaic (PV) Breakeven Conditions

    SciTech Connect (OSTI)

    Davidson, Carolyn; Gagnon, Pieter; Denholm, Paul; Margolis, Robert

    2015-10-01

    The commercial sector offers strong potential for solar photovoltaics (PV) owing to abundant available roof space suitable for PV and the opportunity to offset the sector's substantial retail electricity purchases. This report evaluated the breakeven price of PV for 15 different building types and various financing options by calculating electricity savings based on detailed rate structures for most U.S. utility territories (representing approximately two thirds of U.S. commercial customers). We find that at current capital costs, an estimated 1/3 of U.S. commercial customers break even in the cash scenario and approximately 2/3 break even in the loan scenario. Variation in retail rates is a stronger driver of breakeven prices than is variation in building load or solar generation profiles. At the building level, variation in the average breakeven price is largely driven by the ability for a PV system to reduce demand charges.

  3. InGaN-based thin film solar cells: Epitaxy, structural design, and photovoltaic properties

    SciTech Connect (OSTI)

    Sang, Liwen; Liao, Meiyong; Koide, Yasuo; Sumiya, Masatomo

    2015-03-14

    In{sub x}Ga{sub 1−x}N, with the tunable direct bandgaps from ultraviolet to near infrared region, offers a promising candidate for the high-efficiency next-generation thin-film photovoltaic applications. Although the adoption of thick InGaN film as the active region is desirable to obtain efficient light absorption and carrier collection compared to InGaN/GaN quantum wells structure, the understanding on the effect from structural design is still unclear due to the poor-quality InGaN films with thickness and difficulty of p-type doping. In this paper, we comprehensively investigate the effects from film epitaxy, doping, and device structural design on the performances of the InGaN-based solar cells. The high-quality InGaN thick film is obtained on AlN/sapphire template, and p-In{sub 0.08}Ga{sub 0.92}N is achieved with a high hole concentration of more than 10{sup 18 }cm{sup −3}. The dependence of the photovoltaic performances on different structures, such as active regions and p-type regions is analyzed with respect to the carrier transport mechanism in the dark and under illumination. The strategy of improving the p-i interface by using a super-thin AlN interlayer is provided, which successfully enhances the performance of the solar cells.

  4. Dazhan Photovoltaic Co | Open Energy Information

    Open Energy Info (EERE)

    Dazhan Photovoltaic Co Jump to: navigation, search Name: Dazhan Photovoltaic Co Place: Wenzhou City, Zhejiang Province, China Sector: Solar Product: China-based solar energy cell...

  5. Rankline-Brayton engine powered solar thermal aircraft

    DOE Patents [OSTI]

    Bennett, Charles L.

    2012-03-13

    A solar thermal powered aircraft powered by heat energy from the sun. A Rankine-Brayton hybrid cycle heat engine is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller or other mechanism for enabling sustained free flight. The Rankine-Brayton engine has a thermal battery, preferably containing a lithium-hydride and lithium mixture, operably connected to it so that heat is supplied from the thermal battery to a working fluid. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

  6. Rankine-Brayton engine powered solar thermal aircraft

    DOE Patents [OSTI]

    Bennett, Charles L.

    2009-12-29

    A solar thermal powered aircraft powered by heat energy from the sun. A Rankine-Brayton hybrid cycle heat engine is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller or other mechanism for enabling sustained free flight. The Rankine-Brayton engine has a thermal battery, preferably containing a lithium-hydride and lithium mixture, operably connected to it so that heat is supplied from the thermal battery to a working fluid. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

  7. Temperature compensated photovoltaic array

    DOE Patents [OSTI]

    Mosher, Dan Michael

    1997-11-18

    A temperature compensated photovoltaic module (20) comprised of a series of solar cells (22) having a thermally activated switch (24) connected in parallel with several of the cells (22). The photovoltaic module (20) is adapted to charge conventional batteries having a temperature coefficient (TC) differing from the temperature coefficient (TC) of the module (20). The calibration temperatures of the switches (24) are chosen whereby the colder the ambient temperature for the module (20), the more switches that are on and form a closed circuit to short the associated solar cells (22). By shorting some of the solar cells (22) as the ambient temperature decreases, the battery being charged by the module (20) is not excessively overcharged at lower temperatures. PV module (20) is an integrated solution that is reliable and inexpensive.

  8. Temperature compensated photovoltaic array

    DOE Patents [OSTI]

    Mosher, D.M.

    1997-11-18

    A temperature compensated photovoltaic module comprises a series of solar cells having a thermally activated switch connected in parallel with several of the cells. The photovoltaic module is adapted to charge conventional batteries having a temperature coefficient differing from the temperature coefficient of the module. The calibration temperatures of the switches are chosen whereby the colder the ambient temperature for the module, the more switches that are on and form a closed circuit to short the associated solar cells. By shorting some of the solar cells as the ambient temperature decreases, the battery being charged by the module is not excessively overcharged at lower temperatures. PV module is an integrated solution that is reliable and inexpensive. 2 figs.

  9. Solar-Thermal Fluid-Wall Reaction Processing

    DOE Patents [OSTI]

    Weimer, A. W.; Dahl, J. K.; Lewandowski, A. A.; Bingham, C.; Raska Buechler, K. J.; Grothe, W.

    2006-04-25

    The present invention provides a method for carrying out high temperature thermal dissociation reactions requiring rapid-heating and short residence times using solar energy. In particular, the present invention provides a method for carrying out high temperature thermal reactions such as dissociation of hydrocarbon containing gases and hydrogen sulfide to produce hydrogen and dry reforming of hydrocarbon containing gases with carbon dioxide. In the methods of the invention where hydrocarbon containing gases are dissociated, fine carbon black particles are also produced. The present invention also provides solar-thermal reactors and solar-thermal reactor systems.

  10. Solar-thermal fluid-wall reaction processing

    DOE Patents [OSTI]

    Weimer, Alan W.; Dahl, Jaimee K.; Lewandowski, Allan A.; Bingham, Carl; Buechler, Karen J.; Grothe, Willy

    2006-04-25

    The present invention provides a method for carrying out high temperature thermal dissociation reactions requiring rapid-heating and short residence times using solar energy. In particular, the present invention provides a method for carrying out high temperature thermal reactions such as dissociation of hydrocarbon containing gases and hydrogen sulfide to produce hydrogen and dry reforming of hydrocarbon containing gases with carbon dioxide. In the methods of the invention where hydrocarbon containing gases are dissociated, fine carbon black particles are also produced. The present invention also provides solar-thermal reactors and solar-thermal reactor systems.

  11. Thermal and Electrical Effects of Partial Shade in Monolithic Thin-Film Photovoltaic Modules: Preprint

    SciTech Connect (OSTI)

    Silverman, Timothy J.; Deceglie, Michael G.; Sun, Xingshu; Garris, Rebekah L.; Alam, Muhammad Ashraful; Deline, Chris; Kurtz, Sarah

    2015-09-02

    Photovoltaic cells can be damaged by reverse bias stress, which arises during service when a monolithically integrated thin-film module is partially shaded. We introduce a model for describing a module's internal thermal and electrical state, which cannot normally be measured. Using this model and experimental measurements, we present several results with relevance for reliability testing and module engineering: Modules with a small breakdown voltage experience less stress than those with a large breakdown voltage, with some exceptions for modules having light-enhanced reverse breakdown. Masks leaving a small part of the masked cells illuminated can lead to very high temperature and current density compared to masks covering entire cells.

  12. Agua Caliente, World's Largest Solar Photovoltaic Plant, Helps Advance America's Solar Leadership

    Broader source: Energy.gov [DOE]

    Announcing the launch of Agua Caliente, a utility-scale solar plant that will generate enough clean electricity to power thousands of homes.

  13. Solar Photovoltaic Financing: Deployment on Public Property by State and Local Governments

    SciTech Connect (OSTI)

    Cory, K.; Coughlin, J.; Coggeshall, C.

    2008-05-01

    State and local governments have grown increasingly aware of the economic, environmental, and societal benefits of taking a lead role in U.S. implementation of renewable energy, particularly distributed photovoltaic (PV) installations. Recently, solar energy's cost premium has declined as a result of technology improvements and an increase in the cost of traditional energy generation. At the same time, a nationwide public policy focus on carbon-free, renewable energy has created a wide range of financial incentives to lower the costs of deploying PV even further. These changes have led to exponential increases in the availability of capital for solar projects, and tremendous creativity in the development of third-party ownership structures. As significant users of electricity, state and local governments can be an excellent example for solar PV system deployment on a national scale. Many public entities are not only considering deployment on public building rooftops, but also large-scale applications on available public lands. The changing marketplace requires that state and local governments be financially sophisticated to capture as much of the economic potential of a PV system as possible. This report examines ways that state and local governments can optimize the financial structure of deploying solar PV for public uses.

  14. Solid State Solar Thermal Energy Conversion

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

    Solar Solar How much do you know about solar power? Take our quiz and test your solar energy IQ. | Photo courtesy of NREL. How much do you know about solar power? Take our quiz and test your solar energy IQ. | Photo courtesy of NREL. The tremendous growth in the U.S. solar industry is helping to pave the way to a cleaner, more sustainable energy future. Over the past few years, the cost of a solar energy system has dropped significantly -- helping to give more American families and business

  15. Tandem Microwire Solar Cells for Flexible High Efficiency Low Cost Photovoltaics

    SciTech Connect (OSTI)

    Atwater, Harry A.

    2015-03-10

    This project has developed components of a waferless, flexible, low-cost tandem multijunction III-V/Si microwire array solar cell technology which combines the efficiency of wafered III-V photovoltaic technologies with the process designed to meet the Sunshot object. The project focused on design of lattice-matched GaAsP/SiGe two junction cell design and lattice-mismatched GaInP/Si tandem cell design. Combined electromagnetic simulation/device physics models using realistic microwire tandem structures were developed that predict >22% conversion efficiency for known material parameters, such as tunnel junction structure, window layer structure, absorber lifetimes and optical absorption and these model indicate a clear path to 30% efficiency for high quality III-V heterostructures. SiGe microwire arrays were synthesized via Cu-catalyzed vapor-liquid-solid (VLS) growth with inexpensive chlorosilane and chlorogermance precursors in an atmospheric pressure reactor. SiGe alloy composition in microwires was found to be limited to a maximum of 12% Ge incorporation during chlorogermane growth, due to the melting of the alloy near the solidus composition. Lattice mismatched InGaP double heterostructures were grown by selective epitaxy with a thermal oxide mask on Si microwire substrates using metallorganic vapor phase epitaxy. Transmission electron microscopy (TEM) analysis confirms the growth of individual step graded layers and a high density of defects near the wire/III-V interface. Selective epitaxy was initiated with a low temperature nucleation scheme under “atomic layer epitaxy” or “flow mediated epitaxy” conditions whereby the Ga and P containing precursors are alternately introduced into the reactor to promote layer-bylayer growth. In parallel to our efforts on conformal GaInP heteroepitaxy on selectively masked Si microwires, we explored direct, axial growth of GaAs on Si wire arrays as another route to a tandem junction architecture. We proposed axial, lattice-mismatched growth of a GaAs segment that extrude out of a Si wire via a self-aligned SiO2 hollow cylindrical mask. With this growth strategy, misfit dislocations that would normally form at the GaAs/Si interface during thin film epitaxy may bend over to and thus terminate at the sidewall of the SiO2 tube. A reactive-ion etching technique was employed 1) to remove Si to form a hollow, self-aligned SiO2 cylindrical tube as a growth template for GaAs epitaxy using a vertical, showerhead, low-pressure metal-organic chemical-vapor deposition reactor that was operated at 0.1 atm. Successful epitaxy of axial GaAs wires on non-polar, <111>-oriented Si wire substrates was found at temperatures of ~850C. This and the other III-V/Si heterojunction wire synthesis strategies described here are promising approaches to realize future III-V/Si tandem solar cell designs.

  16. Industry Perspectives on Advanced Inverters for U.S. Solar Photovoltaic Systems: Grid Benefits, Deployment Challenges, and Emerging Solutions

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

    Industry Perspectives on Advanced Inverters for U.S. Solar Photovoltaic Systems: Grid Benefits, Deployment Challenges, and Emerging Solutions Emerson Reiter, Kristen Ardani, and Robert Margolis National Renewable Energy Laboratory Ryan Edge Solar Electric Power Association Technical Report NREL/TP-7A40-65063 September 2015 NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency & Renewable Energy Operated by the Alliance for Sustainable Energy, LLC This

  17. Increasing Community Access to Solar: Designing and Developing a Shared Solar Photovoltaic System (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-06-01

    This document introduces the Energy Department's new Guide to Community Shared Solar: Utility, Private, and Nonprofit Project Development. The guide is designed to help those who want to develop community shared solar projects - from community organizers and advocates to utility managers and government officials - navigate the process of developing shared systems, from early planning to implementation.

  18. Effect of simultaneous electrical and thermal treatment on the performance of bulk heterojunction organic solar cell blended with organic salt

    SciTech Connect (OSTI)

    Sabri, Nasehah Syamin; Yap, Chi Chin; Yahaya, Muhammad; Salleh, Muhamad Mat

    2013-11-27

    This work presents the influence of simultaneous electrical and thermal treatment on the performance of organic solar cell blended with organic salt. The organic solar cells were composed of indium tin oxide as anode, poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene]: (6,6)-phenyl-C61 butyric acid methyl ester: tetrabutylammonium hexafluorophosphate blend as organic active layer and aluminium as cathode. The devices underwent a simultaneous fixed-voltage electrical and thermal treatment at different temperatures of 25, 50 and 75 °C. It was found that photovoltaic performance improved with the thermal treatment temperature. Accumulation of more organic salt ions in the active layer leads to broadening of p-n doped regions and hence higher built-in electric field across thin intrinsic layer. The simultaneous electrical and thermal treatment has been shown to be able to reduce the electrical treatment voltage.

  19. Table 10.7 Solar Thermal Collector Shipments by Market Sector...

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

    Solar Thermal Collector Shipments by Market Sector, End Use, and Type, 2001-2009 (Thousand ... 8Medium-temperature collectors are solar thermal collectors that generally operate ...

  20. Approaches to Future Generation Photovoltaics and Solar Fuels: Quantum Dots, Arrays, and Quantum Dot Solar Cells

    SciTech Connect (OSTI)

    Semonin, O.; Luther, J.; Beard, M.; Johnson, J.; Gao, J.; Nozik, A.

    2012-01-01

    One potential, long-term approach to more efficient and lower cost future generation solar cells for solar electricity and solar fuels is to utilize the unique properties of quantum dots (QDs) to control the relaxation pathways of excited states to enhance multiple exciton generation (MEG). We have studied MEG in close-packed PbSe QD arrays where the QDs are electronically coupled in the films and thus exhibit good transport while still maintaining quantization and MEG. We have developed simple, all-inorganic solution-processable QD solar cells that produce large short-circuit photocurrents and power conversion efficiencies above 5% via nanocrystalline p-n junctions. These solar cells show QYs for photocurrent that exceed 100% in the photon energy regions where MEG is possible; the photocurrent MEG QYs as a function of photon energy match those determined via time-resolved spectroscopy Recent analyses of the major effect of MEG combined with solar concentration on the conversion efficiency of solar cells will also be discussed.

  1. Feasibility Study for Photovoltaics, Wind, solar Hot Water and Hybrid Systems

    SciTech Connect (OSTI)

    Hooks, Ronald; Montoya, Valerie

    2008-03-26

    Southwestern Indian Polytechnic Institute (SIPI) located in Albuquerque New Mexico is a community college that serves American Indians and Alaska Natives. SIPIs student body represents over 100 Native American Tribes. SIPI completed a renewable energy feasibility study program and established renewable energy hardware on the SIPI campus, which supplements and creates an educational resource to teach renewable energy courses. The SIPI campus is located, and has as student origins, areas, in which power is an issue in remote reservations. The following hardware was installed and integrated into the campus facilities: small wind turbine, large photovoltaic array that is grid-connected, two photovoltaic arrays, one thin film type, and one polycrystalline type, one dual-axis active tracker and one passive tracker, a hot air system for heating a small building, a portable hybrid photovoltaic system for remote power, and a hot water system to preheat water used in the SIPI Child Care facility. Educational curriculum has been developed for two renewable energy courses one being the study of energy production and use, and especially the roles renewable energy forms like solar, wind, geothermal, hydro, and biomass plays, and the second course being a more advanced in-depth study of renewable energy system design, maintenance, installation, and applications. Both courses rely heavily on experiential learning techniques so that installed renewable energy hardware is continuously utilized in hand-on laboratory activities and are part of the Electronics program of studies. Renewable energy technologies and science has also been included in other SIPI programs of study such as Environmental Science, Natural Resources, Agriculture, Engineering, Network Management, and Geospatial Technology.

  2. Simulation of a photovoltaic/thermal heat pump system having a modified collector/evaporator

    SciTech Connect (OSTI)

    Xu, Guoying; Deng, Shiming; Zhang, Xiaosong; Yang, Lei; Zhang, Yuehong

    2009-11-15

    A new photovoltaic/thermal heat pump (PV/T-HP) system having a modified collector/evaporator (C/E) has been developed and numerically studied. Multi-port flat extruded aluminum tubes were used in the modified C/E, as compared to round copper tubes used in a conventional C/E. Simulation results suggested that a better operating performance can be achieved for a PV/T-HP system having such a modified C/E. In addition, using the meteorological data in both Nanjing and Hong Kong, China, the simulation results showed that this new PV/T-HP system could efficiently generate electricity and thermal energy simultaneously in both cities all-year-round. Furthermore, improved operation by using variable speed compressor has been designed and discussed. (author)

  3. Residential solar-absorption chiller thermal dynamics

    SciTech Connect (OSTI)

    Guertin, J.M.; Wood, B.D.; McNeill, B.W.

    1981-03-01

    Research is reported on the transient performance of a commercial residential 3 ton lithium bromide-water absorption chiller designed for solar firing. Emphasis was placed on separating the chiller response from that of the entire test facility so that its transient response could solely be observed and quantified. It was found that the entire system time response and thermal capacitance has a major impact on performance degradation due to transient operation. Tests run to ascertain computer algorithms which simulate system isolated chiller performance, revealed processes hitherto undocumented. Transient operation is simulated by three distinct algorithms associated with the three phases of chiller operation. The first phase is start up time. It was revealed during testing that the time required to reach steady state performance values, when the chiller was turned on, was a linear function of steady state water supply temperatures. The second phase is quasi steady state performance. Test facility's performance compared favorably with the manufacturer's published data. The third phase is the extra capacity produced during spin down. Spin down occurs when the hot water supply pump is turned off while the other system pumps remain operating for a few minutes, thus allowing extra chiller capacity to be realized. The computer algorithms were used to generate plots which show the operational surface of an isolated absorption chiller subjected to off design and transient operation.

  4. Integrated thermal solar heat pump system

    SciTech Connect (OSTI)

    Shaw, D.N.

    1980-04-08

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

  5. Photovoltaic System Basics | Department of Energy

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

    System Basics Photovoltaic System Basics August 20, 2013 - 4:00pm Addthis A photovoltaic (PV), or solar electric system, is made up of several photovoltaic solar cells. An ...

  6. Development of thermal performance criteria for residential passive solar buildings

    SciTech Connect (OSTI)

    Sabatiuk, P.A.; Cassel, D.E.; McCabe, M.; Scarbrough, C.

    1980-01-01

    In support of the development of thermal performance criteria for residential passive solar buildings, thermal design characteristics and anticipated performance for 266 projects in the HUD Passive Residential Design Competition and the HUD Cycle 5 Demonstration Program were analyzed. These passive residences are located in all regions of the United States requiring space heating, and they represent a variety of passive solar system types including direct gain, indirect gain, and solarium (isolated gain) systems. The results of this statistical analysis are being used to develop proposed minimum acceptable levels of thermal performance for passive solar buildings for the residential performance criteria. A number of performance measures were examined, including net solar contribution, solar fraction, and auxiliary energy use. These and other design and climate-related parameters were statistically correlated using the DATAPLOT computer program and standard statistical analysis techniques.

  7. NREL: Photovoltaics Research - Concentrator Photovoltaic (CPV...

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

    Concentrator Photovoltaic (CPV) Report - Fraunhofer ISE and NREL Analyze Status of Market and Technology February 4, 2015 The German Fraunhofer Institute for Solar Energy Systems...

  8. Alumni | Solid State Solar Thermal Energy Conversion

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

    ... Visit Website Bo Qiu ThermalMechanical Engineer, Intel Corporation Visit Website Veronika Rinnerbauer Innovation Management, Bosch Visit Website Nitin Shukla Thermal Testing ...

  9. Event Archives | Solid State Solar Thermal Energy Conversion

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

    Cliff Ho for our monthly seminar Workshop S3TEC Annual Workship Saturday, Feb 13, 2016 9:00 am to 8:00 pm MIT Faculty Club Annual Workshop - Solid State Solar Thermal Energy ...

  10. Gang Chen | Solid State Solar Thermal Energy Conversion

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

    Professional Activities: Director, DOE EFRC: Solid-State Solar-Thermal Energy Conversion Center (S3TEC Center), 2009 Co-Editor: Annual Review of Heat Transfer Editor, Journal of ...

  11. Solar-Thermal Fluid-Wall Reaction Processing - Energy Innovation...

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

    Hydrogen and Fuel Cell Hydrogen and Fuel Cell Find More Like This Return to Search Solar-Thermal Fluid-Wall Reaction Processing University of Colorado National Renewable Energy ...

  12. 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;...

  13. Thermal efficiency of single-pass solar air collector

    SciTech Connect (OSTI)

    Ibrahim, Zamry; Ibarahim, Zahari; Yatim, Baharudin; Ruslan, Mohd Hafidz

    2013-11-27

    Efficiency of a finned single-pass solar air collector was studied. This paper presents the experimental study to investigate the effect of solar radiation and mass flow rate on efficiency. The fins attached at the back of absorbing plate to improve the thermal efficiency of the system. The results show that the efficiency is increased proportional to solar radiation and mass flow rate. Efficiency of the collector archived steady state when reach to certain value or can be said the maximum performance.

  14. Implementing Solar Photovoltaic Projects on Historic Buildings and in Historic Districts

    SciTech Connect (OSTI)

    Kandt, A.; Hotchkiss, E.; Walker, A.

    2011-01-01

    Despite a global recession, the number of photovoltaic (PV) installations in the United States grew 30% from 2008 to 2009. A number of trends point toward continued growth of new PV installations. The efficiency of solar panels is increasing, while installation costs are going down. At the same time, federal, state, and local regulations are requiring that greater amounts of energy must come from renewable sources. Incentives for solar power technology implementation are being created and regulatory barriers removed. Corporations and governments are focusing on solar power to demonstrate leadership in environmental sustainability and resource conservation. Architects and builders are including PV arrays as a way to meet green building standards and property owners are seeking PV as a way to reduce their utility bills, as well as their carbon footprints. This publication focuses on the implementation of PV systems on historic properties. Many private property owners, as well as local, state, and national government entities, are seeking guidance on how best to integrate solar PV installations on historic buildings. Historic preservationists maintain that preserving, reusing, and maintaining historic structures is a key sustainable design strategy while also recognizing the importance of accommodating renewable energy technologies where they are appropriate. In some cases, however, conflicts have arisen over the installation of PV panels on historic properties. Addressing these conflicts and providing guidance regarding solutions and best practices is an important step toward resolving or eliminating barriers. Historic properties and districts in the United States provide tangible connections to the nation's past. Thousands of buildings, sites, districts, structures, and objects have been recognized for their historic and architectural significance. Local, state, and national designations of historic properties provide recognition, protection, and incentives that help to preserve those properties for future generations. At the national level, the National Register of Historic Places includes more than 86,000 listings, which encompass a total of more than 1.6 million historic resources. State registers of historic places also provide recognition and protection for historic sites and districts. Locally, more than 2,400 communities have established historic preservation ordinances. Typically implemented through zoning overlays, these local land use regulations manage changes to hundreds of thousands of historic properties. Over a period of 2 years (2007 and 2008) the U.S. Department of Energy (DOE) designated 25 major U.S. cities as Solar America Cities. DOE provided financial and technical assistance to help the cities develop comprehensive approaches to accelerate the adoption of solar energy technologies. The Solar America Cities partnerships represent the foundation of DOE's larger Solar America Communities program. As a part of this program, DOE identified the implementation of solar projects on historic properties and in historic districts as one area to address. A workshop titled 'Implementing Solar Projects on Historic Buildings and in Historic Districts' was held in Denver, Colorado, in June of 2010. Participants included representatives from the solar industry as well as historic preservationists from nonprofit organizations and government agencies at the local, state, and national levels. The workshop provided an opportunity to gain a common understanding of solar technologies and historic preservation procedures and priorities. The workshop participants also discussed some of the challenges involved in locating PV systems on historic properties and identified potential solutions. This publication is based on the discussions that occurred at this workshop and the recommendations that were developed by participants. Ideas expressed by participants in the workshop, and included in this document, do not necessarily reflect the opinion of any government council, agency, or entity.

  15. Thermal storage module for solar dynamic receivers

    DOE Patents [OSTI]

    Beatty, Ronald L. (Farragut, TN); Lauf, Robert J. (Oak Ridge, TN)

    1991-01-01

    A thermal energy storage system comprising a germanium phase change material and a graphite container.

  16. Feasibility Study of Economics and Performance of Solar Photovoltaics at Johnson County Landfill

    SciTech Connect (OSTI)

    Salasovich, J.; Mosey, G.

    2012-01-01

    The U.S. Environmental Protection Agency (EPA), in accordance with the RE-Powering America's Land initiative, selected the Johnson County Landfill in Shawnee, Kansas, for a feasibility study of renewable energy production. Citizens of Shawnee, city planners, and site managers are interested in redevelopment uses for landfills in Kansas that are particularly well suited for grid-tied solar photovoltaic (PV) installation. This report assesses the Johnson County Landfill for possible grid-tied PV installations and estimates the cost, performance, and site impacts of three different PV options: crystalline silicon (fixed tilt), crystalline silicon (single-axis tracking), and thin film (fixed tilt). Each option represents a standalone system that can be sized to use an entire available site area. In addition, the report outlines financing options that could assist in the implementation of a system. The feasibility of PV systems installed on landfills is highly impacted by the available area for an array, solar resource, operating status, landfill cap status, distance to transmission lines, and distance to major roads. The report findings are applicable to other landfills in the surrounding area.

  17. Sandia Energy - National Solar Thermal Test Facility

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

    Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety,...

  18. Sandia Energy National Solar Thermal Test Facility

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

    solarreserve-is-testing-prototype-heliostats-at-nsttffeed 0 Solar Regional Test Center in Vermont Achieves Milestone Installation http:energy.sandia.gov...

  19. Sandia Energy - Solar Resource Assessment

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

    Solar Resource Assessment Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Solar Resource Assessment Solar Resource AssessmentTara...

  20. Sandia Energy - Solar Market Transformation

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

    Solar Market Transformation Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Solar Market Transformation Solar Market TransformationTara...

  1. Project Profile: Scattering Solar Thermal Concentrators

    Broader source: Energy.gov [DOE]

    Pennsylvania State University, under the 2012 SunShot Concentrating Solar Power (CSP) R&D FOA, is designing and testing a novel solar collector system that relies on stationary optics, avoiding the need for mirror movement. The system is capable of achieving optical performance equal to state-of-the-art parabolic trough systems, but at a lower cost.

  2. High temperature solar thermal technology: The North Africa Market

    SciTech Connect (OSTI)

    Not Available

    1990-12-01

    High temperature solar thermal (HTST) technology offers an attractive option for both industrialized and non-industrialized countries to generate electricity and industrial process steam. The purpose of this report is to assess the potential market for solar thermal applications in the North African countries of Algeria, Egypt, Morocco and Tunisia. North Africa was selected because of its outstanding solar resource base and the variety of applications to be found there. Diminishing oil and gas resources, coupled with expanding energy needs, opens a large potential market for the US industry. The US high temperature solar trough industry has little competition globally and could build a large market in these areas. The US is already familiar with certain solar markets in North Africa due to the supplying of substantial quantities of US-manufactured flat plate collectors to this region.

  3. Performance Modeling of an Air-Based Photovoltaic/Thermal (PV/T) Collector

    SciTech Connect (OSTI)

    Casey, R. D.; Brandemuehl, M. J.; Merrigan, T.; Burch, J.

    2010-01-01

    This paper studies a collector design that utilizes unglazed photovoltaic/thermal (PV/T) collectors preheating air for glazed air heating modules. The performance modeling of these collectors is examined both individually and in series. For each collector type, a dynamic, finite difference, first-law model has been created using literature correlations for friction. The models were compared to performance data, calibrating the models by scaling of friction terms for best fit. The calibrated models generally agree well with the experimental data; even during sudden changes to ambient conditions. The root mean square error between the unglazed PV/T model and experiment results for the useful thermal energy gain and the outlet air temperature are 7.12 W/m{sup 2} and 1.07 C, respectively. The annual source energy performance of the building-integrated PV/T (BIPV/T) array is then simulated for residential applications in seven climate zones of the United States of America. The performance of the BIPV/T array is characterized by the amount of net electrical energy and useful thermal energy produced. The useful thermal energy is defined as the amount of energy offset by the BIPV/T system for water heating and space conditioning. A BIPV/T system composed 87.5% of PV modules, and 12.5% of glazed air heating modules, offsets the same amount of source energy as a roof-mounted PV system of the same area. This array composition increases the thermal energy gain by 47% over a BIPV/T array composed solely of PV modules.

  4. Tehachapi solar thermal system first annual report

    SciTech Connect (OSTI)

    Rosenthal, A.

    1993-05-01

    The staff of the Southwest Technology Development Institute (SWTDI), in conjunction with the staff of Industrial Solar Technology (IST), have analyzed the performance, operation, and maintenance of a large solar process heat system in use at the 5,000 inmate California Correctional Institution (CCI) in Tehachapi, CA. This report summarizes the key design features of the solar plant, its construction and maintenance histories through the end of 1991, and the performance data collected at the plant by a dedicated on-site data acquisition system (DAS).

  5. Solar thermal power systems. Annual technical progress report, FY 1979

    SciTech Connect (OSTI)

    Braun, Gerald W.

    1980-06-01

    The Solar Thermal Power Systems Program is the key element in the national effort to establish solar thermal conversion technologies within the major sectors of the national energy market. It provides for the development of concentrating mirror/lens heat collection and conversion technologies for both central and dispersed receiver applications to produce electricity, provide heat at its point of use in industrial processes, provide heat and electricity in combination for industrial, commercial, and residential needs, and ultimately, drive processes for production of liquid and gaseous fuels. This report is the second Annual Technical Progress Report for the Solar Thermal Power Systems Program and is structured according to the organization of the Solar Thermal Power Systems Program on September 30, 1979. Emphasis is on the technical progress of the projects rather than on activities and individual contractor efforts. Each project description indicates its place in the Solar Thermal Power Systems Program, a brief history, the significant achievements and real progress during FY 1979, also future project activities as well as anticipated significant achievements are forecast. (WHK)

  6. Concentrating Photovoltaics (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2009-01-20

    Solar is growing rapidly, and the concentrating photovoltaics industry-both high- and low-concentration cell approaches-may be ready to ramp production in 2009.

  7. Value of Concentrating Solar Power and Thermal Energy Storage

    SciTech Connect (OSTI)

    Sioshansi, R.; Denholm, P.

    2010-02-01

    This paper examines the value of concentrating solar power (CSP) and thermal energy storage (TES) in four regions in the southwestern United States. Our analysis shows that TES can increase the value of CSP by allowing more thermal energy from a CSP plant?s solar field to be used, by allowing a CSP plant to accommodate a larger solar field, and by allowing CSP generation to be shifted to hours with higher energy prices. We analyze the sensitivity of CSP value to a number of factors, including the optimization period, price and solar forecasting, ancillary service sales, capacity value and dry cooling of the CSP plant. We also discuss the value of CSP plants and TES net of capital costs.

  8. Cost-Effective Solar Thermal Energy Storage: Thermal Energy Storage With Supercritical Fluids

    SciTech Connect (OSTI)

    2011-02-01

    Broad Funding Opportunity Announcement Project: UCLA and JPL are creating cost-effective storage systems for solar thermal energy using new materials and designs. A major drawback to the widespread use of solar thermal energy is its inability to cost-effectively supply electric power at night. State-of-the-art energy storage for solar thermal power plants uses molten salt to help store thermal energy. Molten salt systems can be expensive and complex, which is not attractive from a long-term investment standpoint. UCLA and JPL are developing a supercritical fluid-based thermal energy storage system, which would be much less expensive than molten-salt-based systems. The teams design also uses a smaller, modular, single-tank design that is more reliable and scalable for large-scale storage applications.

  9. Renewable Energies and Photovoltaics Spain S L REPS | Open Energy...

    Open Energy Info (EERE)

    and Photovoltaics Spain S L REPS Jump to: navigation, search Name: Renewable Energies and Photovoltaics Spain S.L. (REPS) Place: Spain Sector: Solar Product: Spanish solar project...

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

    Energy Savers [EERE]

    Department of Energy PDF icon solar_thermal_transcript.pdf 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

  11. Research & Development Needs for Building-Integrated Solar Technologies

    Broader source: Energy.gov [DOE]

    Building Integrated Solar Technologies (BIST) can help achieve the Building Technologies Office goal of reducing energy consumption in residential and commercial buildings by 50% by the year 2030. BIST include technologies for space heating and cooling, water heating, hybrid photovoltaic-thermal systems (PV/T), active solar lighting, and building-integrated photovoltaics (BIPV).

  12. Project Profile: Plug-and-Play Solar Photovoltaics for American Homes

    Broader source: Energy.gov [DOE]

    Fraunhofer USA, Inc., Center for Sustainable Energy Systems and its partners, under the Plug-and-Play Photovoltaics FOA, are developing technologies, components, systems, and standards that enable...

  13. Earth-abundant semiconductors for photovoltaic applications ...

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

    Earth-abundant semiconductors for photovoltaic applications Thin film photovoltaics (solar cells) has the potential to revolutionize our energy landscape by producing clean,...

  14. Photovoltaic Cell Performance Basics | Department of Energy

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

    Performance Basics Photovoltaic Cell Performance Basics August 19, 2013 - 4:55pm Addthis Photovoltaic (PV), or solar cells use the energy in sunlight to produce electricity. ...

  15. Photovoltaic Cell Material Basics | Department of Energy

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

    Material Basics Photovoltaic Cell Material Basics August 19, 2013 - 4:43pm Addthis Although crystalline silicon cells are the most common type, photovoltaic (PV), or solar cells, ...

  16. Aurora Photovoltaics Manufacturing | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaics Manufacturing Jump to: navigation, search Name: Aurora Photovoltaics Manufacturing Place: Lawrenceville, New Jersey Zip: 8648 Sector: Solar Product: A subsidiary of...

  17. Progress from DOE EF RC: Solid-State Solar-Thermal Energy Conversion...

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

    Introduction to the solid-state solar-thermal energy conversion center plus discussion on phonon transport and solar thermoelectric energy conversion PDF icon chen.pdf More ...

  18. El Dorado Solar Project Solar Power Plant | Open Energy Information

    Open Energy Info (EERE)

    Solar Project Solar Power Plant Jump to: navigation, search Name El Dorado Solar Project Solar Power Plant Facility El Dorado Solar Project Sector Solar Facility Type Photovoltaic...

  19. Deming Solar Plant Solar Power Plant | Open Energy Information

    Open Energy Info (EERE)

    Deming Solar Plant Solar Power Plant Jump to: navigation, search Name Deming Solar Plant Solar Power Plant Facility Deming Solar Plant Sector Solar Facility Type Photovoltaic...

  20. Semi-transparent solar energy thermal storage device

    DOE Patents [OSTI]

    McClelland, John F.

    1985-06-18

    A visually transmitting solar energy absorbing thermal storage module includes a thermal storage liquid containment chamber defined by an interior solar absorber panel, an exterior transparent panel having a heat mirror surface substantially covering the exterior surface thereof and associated top, bottom and side walls, Evaporation of the thermal storage liquid is controlled by a low vapor pressure liquid layer that floats on and seals the top surface of the liquid. Porous filter plugs are placed in filler holes of the module. An algicide and a chelating compound are added to the liquid to control biological and chemical activity while retaining visual clarity. A plurality of modules may be supported in stacked relation by a support frame to form a thermal storage wall structure.

  1. Semi-transparent solar energy thermal storage device

    DOE Patents [OSTI]

    McClelland, John F.

    1986-04-08

    A visually transmitting solar energy absorbing thermal storage module includes a thermal storage liquid containment chamber defined by an interior solar absorber panel, an exterior transparent panel having a heat mirror surface substantially covering the exterior surface thereof and associated top, bottom and side walls. Evaporation of the thermal storage liquid is controlled by a low vapor pressure liquid layer that floats on and seals the top surface of the liquid. Porous filter plugs are placed in filler holes of the module. An algicide and a chelating compound are added to the liquid to control biological and chemical activity while retaining visual clarity. A plurality of modules may be supported in stacked relation by a support frame to form a thermal storage wall structure.

  2. Methods for Analyzing the Economic Value of Concentrating Solar Power with Thermal Energy Storage

    SciTech Connect (OSTI)

    Denholm, Paul; Jorgenson, Jennie; Miller, Mackay; Zhou, Ella; Wang, Caixia

    2015-07-20

    Concentrating solar power with thermal energy storage (CSP-TES) provides multiple quantifiable benefits compared to CSP without storage or to solar photovoltaic (PV) technology, including higher energy value, ancillary services value, and capacity value. This report describes modeling approaches to quantifying these benefits that have emerged through state-level policymaking in the United States as well as the potential applicability of these methods in China. The technical potential for CSP-TES in China is significant, but deployment has not yet achieved the targets established by the Chinese government. According to the 12th Five Year Plan for Renewable Energy (2011-2015), CSP was expected to reach 1 GW by 2015 and 3 GW by 2020 in China, yet as of December 2014, deployment totaled only 13.8 MW. One barrier to more rapid deployment is the lack of an incentive specific to CSP, such as a feed-in tariff. The 13th Five Year Plan for Solar Generation (2016-2020), which is under development, presents an opportunity to establish a feed-in tariff specific to CSP. This report, produced under the auspices of the U.S.-China Renewable Energy Partnership, aims to support the development of Chinese incentives that advance CSP deployment goals.

  3. Electrical and thermal finite element modeling of arc faults in photovoltaic bypass diodes.

    SciTech Connect (OSTI)

    Bower, Ward Isaac; Quintana, Michael A.; Johnson, Jay

    2012-01-01

    Arc faults in photovoltaic (PV) modules have caused multiple rooftop fires. The arc generates a high-temperature plasma that ignites surrounding materials and subsequently spreads the fire to the building structure. While there are many possible locations in PV systems and PV modules where arcs could initiate, bypass diodes have been suspected of triggering arc faults in some modules. In order to understand the electrical and thermal phenomena associated with these events, a finite element model of a busbar and diode was created. Thermoelectrical simulations found Joule and internal diode heating from normal operation would not normally cause bypass diode or solder failures. However, if corrosion increased the contact resistance in the solder connection between the busbar and the diode leads, enough voltage potentially would be established to arc across micron-scale electrode gaps. Lastly, an analytical arc radiation model based on observed data was employed to predicted polymer ignition times. The model predicted polymer materials in the adjacent area of the diode and junction box ignite in less than 0.1 seconds.

  4. Photovoltaic cell assembly

    DOE Patents [OSTI]

    Beavis, Leonard C.; Panitz, Janda K. G.; Sharp, Donald J.

    1990-01-01

    A photovoltaic assembly for converting high intensity solar radiation into lectrical energy in which a solar cell is separated from a heat sink by a thin layer of a composite material which has excellent dielectric properties and good thermal conductivity. This composite material is a thin film of porous Al.sub.2 O.sub.3 in which the pores have been substantially filled with an electrophoretically-deposited layer of a styrene-acrylate resin. This composite provides electrical breakdown strengths greater than that of a layer consisting essentially of Al.sub.2 O.sub.3 and has a higher thermal conductivity than a layer of styrene-acrylate alone.

  5. Thermal performance of an earth-sheltered passive solar residence

    SciTech Connect (OSTI)

    LaVigne, A.B. (Puget Sound Power and Light Co., Bellevue, WA); Schuldt, M.A.

    1981-01-01

    Results are presented of the measured thermal performance of a direct gain, passive solar residence in the Pacific Northwest. The east, west, and north exterior walls of the house are bermed to within 12 inches (30 cm) of the ceiling; sliding interior insulated panels cover the double glazed, south facing windows when appropriate. The cost of the house construction was kept modest.

  6. Applied research in the solar thermal-energy-systems program

    SciTech Connect (OSTI)

    Brown, C. T.; Lefferdo, J. M.

    1981-03-01

    Within the Solar Thermal Research and Advanced Development (RAD) program a coordinated effort in materials research, fuels and chemical research and applied research is being carried out to meet the systems' needs. Each of these three program elements are described with particular attention given to the applied research activity.

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

    SciTech Connect (OSTI)

    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)

  8. Table 10.6 Solar Thermal Collector Shipments by Type, Price,...

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

    Solar Thermal Collector Shipments by Type, Price, and Trade, 1974-2009 (Thousand Square ... 1,577 1Low-temperature collectors are solar thermal collectors that generally operate ...

  9. Improve photovoltaic performance of titanium dioxide nanorods based dye-sensitized solar cells by Ca-doping

    SciTech Connect (OSTI)

    Li, Weixin; Yang, Junyou Zhang, Jiaqi; Gao, Sheng; Luo, Yubo; Liu, Ming

    2014-09-15

    Highlights: • TiO{sub 2} nanorods doped with Ca ions were synthesized by one-step hydrothermal method. • The flat band edge of rutile TiO{sub 2} shifted positively via Ca-doping. • The photoelectric conversion efficiency of dye-sensitized solar cells (DSSCs) based on TiO{sub 2} electrode was much enhanced by Ca-doping. • A relatively high open circuit voltage was obtained by adopting Ca-doped TiO{sub 2} nanorods electrode. - Abstract: Ca-doped TiO{sub 2} nanorod arrays were prepared via the one-step hydrothermal method successfully, and the effect of Ca ions content on the photovoltaic conversion efficiency of dye-sensitized solar cells has been fully discussed in the paper. Although no obvious change on the microstructure and morphology was observed by field emission scanning electron microscope and transmission electron microscope for the Ca-doped samples, the results of X-ray diffraction and X-ray photoelectron spectroscopy confirmed that Ti{sup 4+} was substituted with Ca{sup 2+} successfully. UV–vis spectroscopy results revealed that the flat band edge shifted positively by Ca ions doping. The photovoltaic conversion efficiency of the dye-sensitized solar cells based on the 2 mol% Ca-doped TiO{sub 2} electrode was 43% higher than that of the undoped one due to the less recombination possibility.

  10. Concentrating Solar Program; Session: Thermal Storage - Overview (Presentation)

    SciTech Connect (OSTI)

    Glatzmaier, G.; Mehos, M.; Mancini, T.

    2008-04-01

    The project overview of this presentation is: (1) description--(a) laboratory R and D in advanced heat transfer fluids (HTF) and thermal storage systems; (b) FOA activities in solar collector and component development for use of molten salt as a heat transfer and storage fluid; (c) applications for all activities include line focus and point focus solar concentrating technologies; (2) Major FY08 Activities--(a) advanced HTF development with novel molten salt compositions with low freezing temperatures, nanofluids molecular modeling and experimental studies, and use with molten salt HTF in solar collector field; (b) thermal storage systems--cost analysis and updates for 2-tank and thermocline storage and model development and analysis to support near-term trought deployment; (c) thermal storage components--facility upgrade to support molten salt component testing for freeze-thaw receiver testing, long-shafted molten salt pump for parabolic trough and power tower thermal storage systems; (d) CSP FOA support--testing and evaluation support for molten salt component and field testing work, advanced fluids and storage solicitation preparation, and proposal evaluation for new advanced HTF and thermal storage FOA.

  11. Development of a Solar-Thermal ZnO/Zn Water-Splitting Thermochemical...

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

    Development of a Solar-thermal ZnOZn Water-splitting Thermochemical Cycle Final Report ... Combining this with annual average solar efficiencies, the overall solar to hydrogen LHV ...

  12. Publications | Solid State Solar Thermal Energy Conversion

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

    Publications Publications supported by S3TEC: 339 Yang, J.; Xi, L.; Qiu, W.; Wu, L.; Shi, X.; Chen, L.; Yang, J.; Zhang, W.; Uher, C.; Singh, D.J., On the tuning of electrical and thermal transport in thermoelectrics: an integrated theory-experiment perspective, Npj Computational Materials, 2, (2016). [DOI: ] 338 Sun, J.; Singh, D.J., Thermoelectric Properties of {\$}{\{}{$\backslash$}mathrm{\{}Mg{\}}{\}}{\_}{\{}2{\}}({$\backslash$}mathrm{\{}Ge{\}},{$\backslash$}mathrm{\{}Sn{\}}){\$}: Model and

  13. Enhanced regeneration of degraded polymer solar cells by thermal annealing

    SciTech Connect (OSTI)

    Kumar, Pankaj; Bilen, Chhinder; Zhou, Xiaojing; Belcher, Warwick J.; Dastoor, Paul C.; Feron, Krishna

    2014-05-12

    The degradation and thermal regeneration of poly(3-hexylethiophene) (P3HT):[6,6]-phenyl-C{sub 61}-butyric acid methyl ester (PCBM) and P3HT:indene-C{sub 60} bisadduct (ICBA) polymer solar cells, with Ca/Al and Ca/Ag cathodes and indium tin oxide/poly(ethylene-dioxythiophene):polystyrene sulfonate anode have been investigated. Degradation occurs via a combination of three primary pathways: (1) cathodic oxidation, (2) active layer phase segregation, and (3) anodic diffusion. Fully degraded devices were subjected to thermal annealing under inert atmosphere. Degraded solar cells possessing Ca/Ag electrodes were observed to regenerate their performance, whereas solar cells having Ca/Al electrodes exhibited no significant regeneration of device characteristics after thermal annealing. Moreover, the solar cells with a P3HT:ICBA active layer exhibited enhanced regeneration compared to P3HT:PCBM active layer devices as a result of reduced changes to the active layer morphology. Devices combining a Ca/Ag cathode and P3HT:ICBA active layer demonstrated ∼50% performance restoration over several degradation/regeneration cycles.

  14. Site selection for concentrated solar thermal systems in Hawaii

    SciTech Connect (OSTI)

    Seki, A.

    1987-01-01

    This report identifies ares on the five major islands (Oahu, Maui, Molakai, Hawaii, and Kauai) that have the potential for concentrating solar thermal applications. The locations are based on existing solar insolation (mostly global and some direct normal) data, other meteorological information, land use, potential end-use, and existing facilities. These areas are: - Western coast of Oahu, especially near Kahe Point - Maui plains area - South-Central Molokai - Kona coast of the Big Island, especially Natural Energy Laboratory of Hawaii - Western and southern areas of Kauai. Monitoring stations are recommended at some of these sites to obtain direct normal insolation data for future evaluation.

  15. Photovoltaic Films - Energy Innovation Portal

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

    Solar Photovoltaic Solar Photovoltaic Find More Like This Return to Search Photovoltaic Films Los Alamos National Laboratory Contact LANL About This Technology LANL&rsquo;s solar power portfolio includes a deposition process known as PAD. PAD eliminates the need for vacuum-based thin film equipment. LANL's solar power portfolio includes a deposition process known as PAD. PAD eliminates the need for vacuum-based thin film equipment. Technology Marketing SummaryThe rising total cost of energy

  16. See-through amorphous silicon solar cells with selectively transparent and conducting photonic crystal back reflectors for building integrated photovoltaics

    SciTech Connect (OSTI)

    Yang, Yang; OBrien, Paul G.; Materials Chemistry Research Group, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6 ; Ozin, Geoffrey A. E-mail: kherani@ecf.utoronto.ca; Kherani, Nazir P. E-mail: kherani@ecf.utoronto.ca

    2013-11-25

    Thin semi-transparent hydrogenated amorphous silicon (a-Si:H) solar cells with selectively transparent and conducting photonic crystal (STCPC) back-reflectors are demonstrated. Short circuit current density of a 135?nm thick a-Si:H cell with a given STCPC back-reflector is enhanced by as much as 23% in comparison to a reference cell with an ITO film functioning as its rear contact. Concurrently, solar irradiance of 295?W/m{sup 2} and illuminance of 3480 lux are transmitted through the cell with a given STCPC back reflector under AM1.5 Global tilt illumination, indicating its utility as a source of space heating and lighting, respectively, in building integrated photovoltaic applications.

  17. EERE Success Story-Solar Junction Develops World Record Setting...

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

    Solar Junction Develops World Record Setting Concentrated Photovoltaic Solar Cell EERE Success Story-Solar Junction Develops World Record Setting Concentrated Photovoltaic Solar ...

  18. Midtemperature solar systems test facility predictions for thermal performance of the Acurex solar collector with FEK 244 reflector surface

    SciTech Connect (OSTI)

    Harrison, T.D.

    1981-01-01

    Thermal performance predictions are presented for the Acurex solar collector, with FEK 244 reflector surface, for three output temperatures at five cities in the United States.

  19. Novel Thermal Storage Technologies for Concentrating Solar Power Generation

    SciTech Connect (OSTI)

    Neti, Sudhakar; Oztekin, Alparslan; Chen, John; Tuzla, Kemal; Misiolek, Wojciech

    2013-06-20

    The technologies that are to be developed in this work will enable storage of thermal energy in 100 MWe solar energy plants for 6-24 hours at temperatures around 300oC and 850oC using encapsulated phase change materials (EPCM). Several encapsulated phase change materials have been identified, fabricated and proven with calorimetry. Two of these materials have been tested in an airflow experiment. A cost analysis for these thermal energy storage systems has also been conducted that met the targets established at the initiation of the project.

  20. SolarOil Project, Phase I preliminary design report. [Solar Thermal Enhanced Oil Recovery project

    SciTech Connect (OSTI)

    Baccaglini, G.; Bass, J.; Neill, J.; Nicolayeff, V.; Openshaw, F.

    1980-03-01

    The preliminary design of the Solar Thermal Enhanced Oil Recovery (SolarOil) Plant is described in this document. This plant is designed to demonstrate that using solar thermal energy is technically feasible and economically viable in enhanced oil recovery (EOR). The SolarOil Plant uses the fixed mirror solar concentrator (FMSC) to heat high thermal capacity oil (MCS-2046) to 322/sup 0/C (611/sup 0/F). The hot fluid is pumped from a hot oil storage tank (20 min capacity) through a once-through steam generator which produces 4.8 MPa (700 psi) steam at 80% quality. The plant net output, averaged over 24 hr/day for 365 days/yr, is equivalent to that of a 2.4 MW (8.33 x 10/sup 6/ Btu/hr) oil-fired steam generator having an 86% availability. The net plant efficiency is 57.3% at equinox noon, a 30%/yr average. The plant will be demonstrated at an oilfield site near Oildale, California.

  1. ANTELOPE VALLEY SOLAR RANCH | Department of Energy

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

    Antelope Valley Solar Ranch 1, a 242-MW photovoltaic (PV) solar generation project. ... Portfolio Projects TITLE XVII Powering New Markets: Utility-scale Photovoltaic Solar ...

  2. SES Solar Three Project Solar Power Plant | Open Energy Information

    Open Energy Info (EERE)

    Three Project Solar Power Plant Jump to: navigation, search Name SES Solar Three Project Solar Power Plant Facility SES Solar Three Project Sector Solar Facility Type Photovoltaics...

  3. Proceedings: Fourth Parabolic Dish Solar Thermal Power Program Review

    SciTech Connect (OSTI)

    Not Available

    1983-02-01

    The results of activities within the parabolic dish technology and applications development program are presented. Stirling, organic Rankine and Brayton module technologies, associated hardware and test results to date, concentrator development and progress, economic analyses, and international dish development activities are covered. Two panel discussions, concerning industry issues affecting solar thermal dish development and dish technology from a utility/user perspective, are also included.

  4. Advanced component research in the solar thermal program

    SciTech Connect (OSTI)

    Brown, C.T.

    1982-08-01

    The Advanced Components Test Facility (ACTF) is a 325 kW /SUB th/ central receiver solar thermal test facility that has as its primary purpose the encouragement of research and development in the area of high temperature solar technology. Five major test programs were undertaken and completed at the ACTF in the 1980-1981 time frame. The objective of each program was to evaluate the technical viability of the concept of converting concentrated solar energy into some other useful form such as high pressure steam, hot compressed air, chemical feedstock, grid connected electrical power, etc. Each program involved the operation of a high temperature central receiver heat exchanger device at or near the facility focus. Specific test programs were undertaken to evaluate a directly heated fluidized bed solar receiver; a high pressure, single-pass-to superheat steam generator; a liquid sodium heat pipe receiver; a flash pyrolysis biomass gasifier; and a Stirling engine/electrical generator. This paper provides a description of the test facility, its capabilities, and the results of the 1980-1981 solar receiver test program.

  5. NREL: Photovoltaics Research - Photovoltaic Energy Ratings Methods

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

    Validation Photovoltaic Energy Ratings Methods Validation The Photovoltaic (PV) Engineering group at NREL validates energy ratings methods by standards committees to establish an energy rating methodology. We are evaluating techniques to account for the impact on PV performance from variations in the spectral distribution of solar radiation. Two types of methods were evaluated for correcting the short-circuit current of PV modules for variations in the solar spectrum under clear skies: (1)

  6. Midtemperature Solar Systems Test Facility predictions for thermal performance of the Solar Kinetics T-700 solar collector with FEK 244 reflector surface

    SciTech Connect (OSTI)

    Harrison, T.D.

    1980-11-01

    Thermal performance predictions are presented for the Solar Kinetics T-700 solar collector, with FEK 244 reflector surface, for three output temperatures at five cities in the United States.

  7. Apparatus for encapsulating a photovoltaic module

    DOE Patents [OSTI]

    Albright, Scot P.; Dugan, Larry M.

    1995-10-24

    The subject inventions concern various photovoltaic module designs to protect the module from horizontal and vertical impacts and degradation of solar cell efficiency caused by moisture. In one design, a plurality of panel supports that are positioned adjacent to the upper panel in a photovoltaic module absorb vertical forces exerted along an axis perpendicular to the upper panel. Other designs employ layers of glass and tempered glass, respectively, to protect the module from vertical impacts. A plurality of button-shaped channels is used around the edges of the photovoltaic module to absorb forces applied to the module along an axis parallel to the module and direct moisture away from the module that could otherwise penetrate the module and adversely affect the cells within the module. A spacer is employed between the upper and lower panels that has a coefficient of thermal expansion substantially equivalent to the coefficient of thermal expansion of at least one of the panels.

  8. Sandia Energy - Glitter-Sized Photovoltaic Cells in Utility-Scale...

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

    Glitter-Sized Photovoltaic Cells in Utility-Scale Solar Power Systems Home Renewable Energy Energy News Photovoltaic Solar Glitter-Sized Photovoltaic Cells in Utility-Scale Solar...

  9. Photovoltaic generator with a spherical imaging lens for use with a paraboloidal solar reflector

    DOE Patents [OSTI]

    Angel, Roger P

    2013-01-08

    The invention is a generator for photovoltaic conversion of concentrated sunlight into electricity. A generator according to the invention incorporates a plurality of photovoltaic cells and is intended for operation near the focus of a large paraboloidal reflector pointed at the sun. Within the generator, the entering concentrated light is relayed by secondary optics to the cells arranged in a compact, concave array. The light is delivered to the cells at high concentration, consistent with high photovoltaic conversion efficiency and low cell cost per unit power output. Light enters the generator, preferably first through a sealing window, and passes through a field lens, preferably in the form of a full sphere or ball lens centered on the paraboloid focus. This lens forms a concentric, concave and wide-angle image of the primary reflector, where the intensity of the concentrated light is stabilized against changes in the position of concentrated light entering the generator. Receiving the stabilized light are flat photovoltaic cells made in different shapes and sizes and configured in a concave array corresponding to the concave image of a given primary reflector. Photovoltaic cells in a generator are also sized and interconnected so as to provide a single electrical output that remains high and stable, despite aberrations in the light delivered to the generator caused by, for example, mispointing or bending of the primary reflector. In some embodiments, the cells are set back from the image formed by the ball lens, and part of the light is reflected onto each cell small secondary reflectors in the form of mirrors set around its perimeter.

  10. Project Profile: High-Temperature Thermal Array for Next-Generation Solar Thermal Power Production

    Broader source: Energy.gov [DOE]

    The Los Alamos National Laboratory (ORNL), under the National Laboratory R&D competitive funding opportunity, is developing a megawatt-scale heat pipe–based technology designed to bridge the heliostat reflector field and the power cycle by replacing both the solar receiver and the heat transfer fluid (HTF) system used in concentrating solar power (CSP) systems. The technology, called the high-temperature thermal array, aims to achieve the SunShot Initiative's goals by addressing technical challenges, reducing capital and operating expenses, and increasing net photon-to-electricity conversion efficiency.

  11. Solar For Schools: A Case Study in Identifying and Implementing Solar Photovoltaic (PV) Projects in Three California School Districts: Preprint

    SciTech Connect (OSTI)

    Kandt, A.

    2011-04-01

    The Department of Energy's (DOE) Solar America Showcase program seeks to accelerate demand for solar technologies among key end use market sectors. As part of this activity the DOE provides Technical Assistance through its national laboratories to large-scale, high-visibility solar installation projects. The Solar Schools Assessment and Implementation Project (SSAIP) in the San Francisco Bay area was selected for a 2009 DOE Solar American Showcase award. SSAIP was formed through the efforts of the nonprofit Sequoia Foundation and includes three school districts: Berkeley, West Contra Costa, and Oakland Unified School Districts. This paper summarizes the technical assistance efforts that resulted from this technical assistance support. It serves as a case study and reference document detailing the steps and processes that could be used to successfully identify, fund, and implement solar PV projects in school districts across the country.

  12. Energy Department Invests $13 Million in U.S. Solar Manufacturing...

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

    of efficient, affordable photovoltaic and concentrating solar power technologies. ... manufacturing processes for photovoltaic and concentrating solar power technologies. ...

  13. Using CAD software to simulate PV energy yield - The case of product integrated photovoltaic operated under indoor solar irradiation

    SciTech Connect (OSTI)

    Reich, N.H.; van Sark, W.G.J.H.M.; Turkenburg, W.C.; Sinke, W.C.

    2010-08-15

    In this paper, we show that photovoltaic (PV) energy yields can be simulated using standard rendering and ray-tracing features of Computer Aided Design (CAD) software. To this end, three-dimensional (3-D) sceneries are ray-traced in CAD. The PV power output is then modeled by translating irradiance intensity data of rendered images back into numerical data. To ensure accurate results, the solar irradiation data used as input is compared to numerical data obtained from rendered images, showing excellent agreement. As expected, also ray-tracing precision in the CAD software proves to be very high. To demonstrate PV energy yield simulations using this innovative concept, solar radiation time course data of a few days was modeled in 3-D to simulate distributions of irradiance incident on flat, single- and double-bend shapes and a PV powered computer mouse located on a window sill. Comparisons of measured to simulated PV output of the mouse show that also in practice, simulation accuracies can be very high. Theoretically, this concept has great potential, as it can be adapted to suit a wide range of solar energy applications, such as sun-tracking and concentrator systems, Building Integrated PV (BIPV) or Product Integrated PV (PIPV). However, graphical user interfaces of 'CAD-PV' software tools are not yet available. (author)

  14. Fifth parabolic dish solar thermal power program annual review: proceedings

    SciTech Connect (OSTI)

    1984-03-01

    The primary objective of the Review was to present the results of activities within the Parabolic Dish Technology and Module/Systems Development element of the Department of Energy's Solar Thermal Energy Systems Program. The Review consisted of nine technical sessions covering overall Project and Program aspects, Stirling and Brayton module development, concentrator and engine/receiver development, and associated hardware and test results to date; distributed systems operating experience; international dish development activities; and non-DOE-sponsored domestic dish activities. A panel discussion concerning business views of solar electric generation was held. These Proceedings contain the texts of presentations made at the Review, as submitted by their authors at the beginning of the Review; therefore, they may vary slightly from the actual presentations in the technical sessions.

  15. Solar energy legal bibliography update

    SciTech Connect (OSTI)

    Seeley, D.

    1980-06-01

    The Solar Energy Legal Bibliography Update is a compilation of approximately 100 solar publications abstracted for their legal and policy content (covering the period October 1978 to August 1979). Emphasis is on legal barriers and incentives to solar energy development. Abstracts are arranged under the following categories: Antitrust, Biomass, Building Codes, Consumer Protection, Environmental Aspects, Federal Legislation and Programs, Financing/Insurance, International Law, Labor, Land Use (Covenants, Easements, Nuisance, Zoning), Local Legislation and Programs, Ocean Energy, Patents and Licenses, Photovoltaics, Solar Access Rights, Solar Heating and Cooling, Solar Thermal Power Systems, Standards, State Legislation and Programs, Tax Law, Tort Liability, Utilities, Warranties, Wind Resources, and General Solar Law.

  16. Solar Newsletter

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

    Events, Photovoltaic, Renewable Energy, Research & Capabilities, Solar, Solar Newsletter, SunShot, ... The system will be monitored and tested to collect a range of data ...

  17. Feasibility Study of Economics and Performance of Solar Photovoltaics at the Stringfellow Superfund Site in Riverside, California

    SciTech Connect (OSTI)

    Mosey, G.; Van Geet, O.

    2010-12-01

    This report presents the results of an assessment of the technical and economic feasibility of deploying a photovoltaics (PV) system on the Stringfellow Superfund Site in Riverside, California. The site was assessed for possible PV installations. The cost, performance, and site impacts of different PV options were estimated. The economics of the potential systems were analyzed using an electric rate of $0.13/kWh and incentives offered by Southern California Edison under the California Solar Initiative. According to the assessment, a government-owned, ground-mounted PV system represents a technically and economically feasible option. The report recommends financing options that could assist in the implementation of such a system.

  18. Potential for Photovoltaic Solar Installation in Non-Irrigated Corners of Center Pivot Irrigation Fields in the State of Colorado

    SciTech Connect (OSTI)

    Roberts, B.

    2011-07-01

    The State of Colorado expressed an interest in assessing the potential for photovoltaic (PV) solar installations on non-irrigated corners of center-pivot irrigation (CPI) fields throughout the state. Using aerial imagery and irrigated land data available from the Colorado Water Conservation Board, an assessment of potentially suitable sites was produced. Productivity estimates were calculated from that assessment. The total area of non-irrigated corners of CPI fields in Colorado was estimated to be 314,674 acres, which could yield 223,418 acres of installed PV panels assuming 71% coverage in triangular plots. The total potential annual electricity production for the state was estimated to be 56,821 gigawatt hours (GWH), with an average of 1.3 GWH per available plot.

  19. Improved photovoltaic energy output for cloudy conditions with a solar tracking system

    SciTech Connect (OSTI)

    Kelly, Nelson A.; Gibson, Thomas L.

    2009-11-15

    This work describes measurements of the solar irradiance made during cloudy periods in order to improve the amount of solar energy captured during such periods. It is well-known that 2-axis tracking, in which solar modules are pointed at the sun, improves the overall capture of solar energy by a given area of modules by 30-50% versus modules with a fixed tilt. On sunny days the direct sunshine accounts for up to 90% of the total solar energy, with the other 10% from diffuse (scattered) solar energy. However, during overcast conditions nearly all of the solar irradiance is diffuse radiation that is isotropically-distributed over the whole sky. An analysis of our data shows that during overcast conditions, tilting a solar module or sensor away from the zenith reduces the irradiance relative to a horizontal configuration, in which the sensor or module is pointed toward the zenith (horizontal module tilt), and thus receives the highest amount of this isotropically-distributed sky radiation. This observation led to an improved tracking algorithm in which a solar array would track the sun during cloud-free periods using 2-axis tracking, when the solar disk is visible, but go to a horizontal configuration when the sky becomes overcast. During cloudy periods we show that a horizontal module orientation increases the solar energy capture by nearly 50% compared to 2-axis solar tracking during the same period. Improving the harvesting of solar energy on cloudy days is important to using solar energy on a daily basis for fueling fuel-cell electric vehicles or charging extended-range electric vehicles because it improves the energy capture on the days with the lowest hydrogen generation, which in turn reduces the system size and cost. (author)

  20. NREL: Photovoltaics Research Home Page

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

    Photovoltaic (PV) research and development (R&D) at the National Renewable Energy Laboratory (NREL) focuses on (1) boosting solar cell conversion efficiencies, (2) lowering the ...

  1. Photovoltaic technology assessment

    SciTech Connect (OSTI)

    Backus, C.E.

    1981-01-01

    After a brief review of the history of photovoltaic devices and a discussion of the cost goals set for photovoltaic modules, the status of photovoltaic technology is assessed. Included are discussions of: current applications, present industrial production, low-cost silicon production techniques, energy payback periods for solar cells, advanced materials research and development, concentrator systems, balance-of-system components. Also discussed are some nontechnical aspects, including foreign markets, US government program approach, and industry attitudes and approaches. (LEW)

  2. Sputtered Thin Film Photovoltaics - Energy Innovation Portal

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

    Solar Photovoltaic Solar Photovoltaic Find More Like This Return to Search Sputtered Thin Film Photovoltaics Naval Research Laboratory Contact NRL About This Technology Publications: PDF Document Publication SputteringThinFilmPhotovoltaics (81 KB) Technology Marketing SummaryThe Naval Research Laboratory (NRL) has developed a suite of processes for the fabrication of bulk and sputtered thin film copper indium gallium diselenide (CIGS) and related materials for photovoltaic (PV)

  3. Solar-thermal-energy collection/storage-pond system

    DOE Patents [OSTI]

    Blahnik, D.E.

    1982-03-25

    A solar thermal energy collection and storage system is disclosed. Water is contained, and the water surface is exposed directly to the sun. The central part of an impermeable membrane is positioned below the water's surface and above its bottom with a first side of the membrane pointing generally upward in its central portion. The perimeter part of the membrane is placed to create a watertight boundary separating the water into a first volume which is directly exposable to the sun and which touches the membranes first side, and a second volumn which touches the membranes second side. A salt is dissolved in the first water volume.

  4. Solar collection

    SciTech Connect (OSTI)

    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.

  5. Sandia Energy - Sandians Win 'Best Paper' Award at Photovoltaic...

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

    Win 'Best Paper' Award at Photovoltaic Conference in Japan Home Renewable Energy Energy Facilities News SunShot News & Events Photovoltaic Solar Systems Analysis Computational...

  6. New Tomorrow Photovoltaic Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Tomorrow Photovoltaic Co Ltd Jump to: navigation, search Name: New Tomorrow Photovoltaic Co Ltd Place: Shenzhen, Guangdong Province, China Zip: 518112 Sector: Solar Product:...

  7. Xi an Huanghe Photovoltaic Technology Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Huanghe Photovoltaic Technology Co Ltd Jump to: navigation, search Name: Xi'an Huanghe Photovoltaic Technology Co Ltd Place: Xi'an, Shaanxi Province, China Sector: Solar Product:...

  8. Solar Access to Public Capital (SAPC) Working Group: Best Practices in Commercial and Industrial (C&I) Solar Photovoltaic System Installation; Period of Performance: November 28, 2014-September 1, 2015

    SciTech Connect (OSTI)

    Doyle, Chris; Loomans, Len; Truitt, Andrew; Lockhart, Robert; Golden, Matt; Dabbagh, Kareem; Lawrence, Richard

    2015-12-29

    This Best Practices in Commercial and Industrial Solar Photovoltaic System Installation Guide is the second of a series of guides designed to standardize and improve solar asset transparency for investors and rating agencies, provide an industry framework for quality management, and reduce transaction costs in the solar asset securitization process. The Best Practices in C&I PV System Installation Guide is intended to outline the minimum requirements for commercial and industrial solar project developments. Adherence to the guide is voluntary. Providers that adhere to the guide are responsible for self-certifying that they have fulfilled the guide requirements. Investors and rating agencies should verify compliance.

  9. The potential impact of ZT=4 thermoelectric materials on solar thermal

    Office of Scientific and Technical Information (OSTI)

    energy conversion technologies. (Journal Article) | SciTech Connect Journal Article: The potential impact of ZT=4 thermoelectric materials on solar thermal energy conversion technologies. Citation Details In-Document Search Title: The potential impact of ZT=4 thermoelectric materials on solar thermal energy conversion technologies. State-of-the-art methodologies for the conversion of solar thermal power to electricity are based on conventional electromagnetic induction techniques. If

  10. Banking on Solar: An Analysis of Banking Opportunities in the U.S. Distributed Photovoltaic Market

    SciTech Connect (OSTI)

    Feldman, D.; Lowder, T.

    2014-11-01

    This report provides a high-level overview of the developing U.S. solar loan product landscape, from both a market and economic perspective. It covers current and potential U.S. solar lending institutions; currently available loan products; loan program structures and post-loan origination options; risks and uncertainties of the solar asset class as it pertains to lenders; and an economic analysis comparing loan products to third party-financed systems in California.

  11. Thermal influence on charge carrier transport in solar cells based on GaAs PN junctions

    SciTech Connect (OSTI)

    Osses-Márquez, Juan; Calderón-Muñoz, Williams R.

    2014-10-21

    The electron and hole one-dimensional transport in a solar cell based on a Gallium Arsenide (GaAs) PN junction and its dependency with electron and lattice temperatures are studied here. Electrons and heat transport are treated on an equal footing, and a cell operating at high temperatures using concentrators is considered. The equations of a two-temperature hydrodynamic model are written in terms of asymptotic expansions for the dependent variables with the electron Reynolds number as a perturbation parameter. The dependency of the electron and hole densities through the junction with the temperature is analyzed solving the steady-state model at low Reynolds numbers. Lattice temperature distribution throughout the device is obtained considering the change of kinetic energy of electrons due to interactions with the lattice and heat absorbed from sunlight. In terms of performance, higher values of power output are obtained with low lattice temperature and hot energy carriers. This modeling contributes to improve the design of heat exchange devices and thermal management strategies in photovoltaic technologies.

  12. Solar Photovoltaic Financing: Deployment on Public Property by State and Local Governments

    Broader source: Energy.gov [DOE]

    This report examines ways that state and local governments can optimize the financial structure of deploying solar PV for public uses.

  13. Distributed Solar Photovoltaics for Electric Vehicle Charging: Regulatory and Policy Considerations (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2014-09-01

    Increasing demand for electric vehicle (EV) charging provides an opportunity for market expansion of distributed solar technology. A major barrier to the current deployment of solar technology for EV charging is a lack of clear information for policy makers, utilities and potential adopters. This paper introduces the pros and cons of EV charging during the day versus at night, summarizes the benefits and grid implications of combining solar and EV charging technologies, and offers some regulatory and policy options available to policy makers and regulators wanting to incentivize solar EV charging.

  14. The Solar Energy Consortium of New York Photovoltaic Research and Development Center

    SciTech Connect (OSTI)

    Klein, Petra M.

    2012-10-15

    Project Objective: To lead New York State to increase its usage of solar electric systems. The expected outcome is that appropriate technologies will be made available which in turn will help to eliminate barriers to solar energy usage in New York State. Background: The Solar Energy Consortium has been created to lead New York State research on solar systems specifically directed at doubling the efficiency, halving the cost and reducing the cost of installation as well as developing unique form factors for the New York City urban environment.

  15. Progress in solar engineering

    SciTech Connect (OSTI)

    Yogi Goswami, D.

    1987-01-01

    This book presents reviews of various areas of solar energy technology, including wind energy technology and ocean thermal energy conversion (OTEC). It also identifies and suggests needs and future directions of research and development. The subjects covered in this book include solar thermal power technology, solar thermal storage, solar ponds, industrial process heat, solar water heating, active and passive solar cooling methods, low-cost collector development, photovoltaic research and applications, wind energy technology, and OTEC. Also covered are the status of the technology, basic and applied research, design and analysis methods, and performance and operational experiences of various systems. The book will thus be helpful as a review of various solar, wind, and OTEC technologies.

  16. Modeling, design and thermal performance of a BIPV/T system thermally coupled with a ventilated concrete slab in a low energy solar house: Part 2, ventilated concrete slab

    SciTech Connect (OSTI)

    Chen, Yuxiang; Galal, Khaled; Athienitis, A.K.

    2010-11-15

    This paper is the second of two papers that describe the modeling and design of a building-integrated photovoltaic-thermal (BIPV/T) system thermally coupled with a ventilated concrete slab (VCS) adopted in a prefabricated, two-storey detached, low energy solar house and their performance assessment based on monitored data. The VCS concept is based on an integrated thermal-structural design with active storage of solar thermal energy while serving as a structural component - the basement floor slab ({proportional_to}33 m{sup 2}). This paper describes the numerical modeling, design, and thermal performance assessment of the VCS. The thermal performance of the VCS during the commissioning of the unoccupied house is presented. Analysis of the monitored data shows that the VCS can store 9-12 kWh of heat from the total thermal energy collected by the BIPV/T system, on a typical clear sunny day with an outdoor temperature of about 0 C. It can also accumulate thermal energy during a series of clear sunny days without overheating the slab surface or the living space. This research shows that coupling the VCS with the BIPV/T system is a viable method to enhance the utilization of collected solar thermal energy. A method is presented for creating a simplified three-dimensional, control volume finite difference, explicit thermal model of the VCS. The model is created and validated using monitored data. The modeling method is suitable for detailed parametric study of the thermal behavior of the VCS without excessive computational effort. (author)

  17. Midtemperature solar systems test faclity predictions for thermal performance based on test data: Solar Kinetics T-700 solar collector with glass reflector surface

    SciTech Connect (OSTI)

    Harrison, T.D.

    1981-03-01

    Sandia National Laboratories, Albuquerque (SNLA), is currently conducting a program to predict the performance and measure the characteristics of commercially available solar collectors that have the potential for use in industrial process heat and enhanced oil recovery applications. The thermal performance predictions for the Solar Kinetics solar line-focusing parabolic trough collector for five cities in the US are presented. (WHK)

  18. Method and apparatus for uniformly concentrating solar flux for photovoltaic applications

    DOE Patents [OSTI]

    Jorgensen, Gary J. (Pine, CO); Carasso, Meir (Lakewood, CO); Wendelin, Timothy J. (Golden, CO); Lewandowski, Allan A. (Evergreen, CO)

    1992-01-01

    A dish reflector and method for concentrating moderate solar flux uniformly on a target plane on a solar cell array, the dish having a stepped reflective surface that is characterized by a plurality of ring-like segments arranged about a common axis, and each segment having a concave spherical configuration.

  19. NREL: Photovoltaics Research - News

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

    News The U.S. Department of Energy's National Renewable Energy Laboratory Photovoltaic (PV) Research Program provides links to a variety of solar news sources to keep you apprised of PV Research subprogram and solar industry activities. NREL PV News Keep current on all the latest news releases and news stories about NREL PV research. See also PV events. Printable Version Photovoltaics Research Home Polycrystalline Thin Films Multijunctions New Materials, Devices, & Processes Testing &

  20. Photovoltaics Fact Sheet

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

    Mesa Verde National Park in Colorado is the home of this PV array, where it provides energy for the visitor center. Photo Courtesy: Department of Energy Photovoltaics The U.S. Department of Energy (DOE)'s Solar Energy Technologies Office works with industry, academia, national laboratories, and other government agencies to advance solar photovoltaics (PV), which is the direct conversion of sunlight into electricity by a semiconductor, in support of the goals of the SunShot Initiative. SunShot

  1. Residential Solar and Wind Energy Systems Tax Credit

    Broader source: 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...

  2. China Glass Solar aka CG Solar formerly Weihai Bluestar Terra...

    Open Energy Info (EERE)

    Glass Solar aka CG Solar formerly Weihai Bluestar Terra Photovoltaic Co Ltd Jump to: navigation, search Name: China Glass Solar (aka CG Solar, formerly Weihai Bluestar Terra...

  3. Mechanism of Thermal Reversal of the (Fulvalene)tetracarbonyldiruthenium Photoisomerization: Toward Molecular Solar-Thermal Energy Storage

    SciTech Connect (OSTI)

    Kanai, Y; Srinivasan, V; Meier, S K; Vollhardt, K P; Grossman, J C

    2010-02-18

    In the currently intensifying quest to harness solar energy for the powering of our planet, most efforts are centered around photoinduced generic charge separation, such as in photovoltaics, water splitting, other small molecule activation, and biologically inspired photosynthetic systems. In contrast, direct collection of heat from sunlight has received much less diversified attention, its bulk devoted to the development of concentrating solar thermal power plants, in which mirrors are used to focus the sun beam on an appropriate heat transfer material. An attractive alternative strategy would be to trap solar energy in the form of chemical bonds, ideally through the photoconversion of a suitable molecule to a higher energy isomer, which, in turn, would release the stored energy by thermal reversal. Such a system would encompass the essential elements of a rechargeable heat battery, with its inherent advantages of storage, transportability, and use on demand. The underlying concept has been explored extensively with organic molecules (such as the norbornadiene-quadricyclane cycle), often in the context of developing photoswitches. On the other hand, organometallic complexes have remained relatively obscure in this capacity, despite a number of advantages, including expanded structural tunability and generally favorable electronic absorption regimes. A highly promising organometallic system is the previously reported, robust photo-thermal fulvalene (Fv) diruthenium couple 1 {l_reversible} 2 (Scheme 1). However, although reversible and moderately efficient, lack of a full, detailed atom-scale understanding of its key conversion and storage mechanisms have limited our ability to improve on its performance or identify optimal variants, such as substituents on the Fv, ligands other than CO, and alternative metals. Here we present a theoretical investigation, in conjunction with corroborating experiments, of the mechanism for the heat releasing step of 2 {yields} 1 and its Fe (4) and Os (6) relatives. The results of the combined study has enabled a rigorous interpretation of earlier and new experimental measurements and paint a surprising picture. First-principles calculations were employed based on spin unrestricted density functional theory (DFT) with a non-empirical gradient corrected exchange-correlation functional. Ultrasoft pseudopotentials were used to describe the valence-core interactions of electrons, including scalar relativistic effects of the core. Wavefunctions and charge densities were expanded in plane waves with kinetic energies up to 25 and 200 Rydberg, respectively. Reaction pathways were delineated with the string method, as implemented within the Car-Parrinello approach. This method allows for the efficient determination of the minimum energy path (MEP) of atomistic transitions and thus also saddle points (transition states, TSs), which are the energy maxima along the MEP. All geometries were optimized until all forces on the atoms were less than 0.02 eV/{angstrom}. The calculated structures of 1 and 2 were in good agreement with their experimental counterparts.

  4. Progress from DOE EF RC: Solid-State Solar-Thermal Energy Conversion Center (S3TEC)

    Broader source: Energy.gov [DOE]

    Introduction to the solid-state solar-thermal energy conversion center plus discussion on phonon transport and solar thermoelectric energy conversion

  5. Modeling, design and thermal performance of a BIPV/T system thermally coupled with a ventilated concrete slab in a low energy solar house: Part 1, BIPV/T system and house energy concept

    SciTech Connect (OSTI)

    Chen, Yuxiang; Athienitis, A.K.; Galal, Khaled

    2010-11-15

    This paper is the first of two papers that describe the modeling, design, and performance assessment based on monitored data of a building-integrated photovoltaic-thermal (BIPV/T) system thermally coupled with a ventilated concrete slab (VCS) in a prefabricated, two-storey detached, low energy solar house. This house, with a design goal of near net-zero annual energy consumption, was constructed in 2007 in Eastman, Quebec, Canada - a cold climate area. Several novel solar technologies are integrated into the house and with passive solar design to reach this goal. An air-based open-loop BIPV/T system produces electricity and collects heat simultaneously. Building-integrated thermal mass is utilized both in passive and active forms. Distributed thermal mass in the direct gain area and relatively large south facing triple-glazed windows (about 9% of floor area) are employed to collect and store passive solar gains. An active thermal energy storage system (TES) stores part of the collected thermal energy from the BIPV/T system, thus reducing the energy consumption of the house ground source heat pump heating system. This paper focuses on the BIPV/T system and the integrated energy concept of the house. Monitored data indicate that the BIPV/T system has a typical efficiency of about 20% for thermal energy collection, and the annual space heating energy consumption of the house is about 5% of the national average. A thermal model of the BIPV/T system suitable for preliminary design and control of the airflow is developed and verified with monitored data. (author)

  6. Scaled Solar | Open Energy Information

    Open Energy Info (EERE)

    Solar Product: Scaled Solar manufacturers and markets utility-grade, concentrated photovoltaic solar energy systems to commercial customers References: Scaled Solar1 This...

  7. Sandia Energy - Solar Glare Hazard Analysis Tool

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

    Solar Glare Hazard Analysis Tool Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Solar Market Transformation Solar Glare Hazard Analysis Tool Solar...

  8. NREL: Photovoltaics Research - Photovoltaic Manufacturing R&D Project

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

    Photovoltaic Manufacturing R&D Project Photo of blue solar cells being sorted in a production line. A woman works behind the protective glass in the background. BP Solar's manufacturing capabilities include automatic sorting of solar cells after final testing. NREL's Photovoltaic (PV) Manufacturing Research and Development (R&D) Project was a cost-shared partnership between NREL and a number of private-sector solar companies. The primary project goals were to reduce costs for consumers

  9. Linkages from DOEs Solar Photovoltaic R&D to Commercial Renewable...

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

    ... events in the timeline of solar PV history are: the first recognition of the ... The front page of a patent document contains a list of references to -prior art. Prior ...

  10. Photovoltaic-Reliability R&D Toward a Solar-Powered World (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Granata, J.

    2009-08-01

    Presentation about the importance of continued progress toward low-cost, high-reliability, and high-performance PV systems. High reliability is an essential element in achieving low-cost solar electricity.

  11. Interagency Advanced Power Group Solar Photovoltaic Panel Fall meeting minutes, October 22, 1992

    SciTech Connect (OSTI)

    Not Available

    1992-12-31

    This report contains discussions on the following topics: Leaf, TPL, and {sup 60}Co Gamma source testing facilities; in-house photovolatic research effort; US Army`s interest developing small thermophotovoatic power source for a variety of missions; charging lead acid batteries with unregulated photovolatic panels; testing of solar array panels for space applications; polycrystalline CuInSe{sub 2} & CdTe PV solar cells and, current activities in the US photovolatic program.

  12. Photovoltaics | Department of Energy

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

    Photovoltaics Photovoltaics The SunShot Initiative supports the research and development of photovoltaic (PV) technologies to improve efficiency and reliability and to lower manufacturing costs in order to make solar electricity cost-competitive with other sources of energy by 2020. As of November 2015, four years into the decade-long SunShot Initiative, the solar industry is about 70% of the way to achieving SunShot's cost target of $0.06 per kilowatt-hour for utility-scale PV (based on 2010

  13. Bibliography of reports of the Sandia Solar Thermal Distributed Receiver Systems Project

    SciTech Connect (OSTI)

    Leonard, J.A.; Klimas, C.R.

    1984-04-01

    This document, which is a bibliography of solar thermal distributed receiver reports and publications by Sandia Laboratories and its contractors, is provided as a convenient reference for those interested in solar thermal technology. Reports are listed by principal author, by report numbers, and by unnumbered reports.

  14. Transparent, near-infrared organic photovoltaic solar cells for window and energy-scavenging applications

    SciTech Connect (OSTI)

    Lunt, Richard R; Bulovic, Vladimir

    2011-03-14

    We fabricate near-infrared absorbing organic photovoltaics that are highly transparent to visible light. By optimizing near-infrared optical-interference, we demonstrate power efficiencies of 1.3±0.1% with simultaneous average visible transmission of >65% . Subsequent incorporation of near-infrared distributed-Bragg-reflector mirrors leads to an increase in the efficiency to 1.7±0.1% , approaching the 2.4±0.2% efficiency of the opaque cell, while maintaining high visible-transparency of >55% . Finally, we demonstrate that a series-integrated array of these transparent cells is capable of powering electronic devices under near-ambient lighting. This architecture suggests strategies for high-efficiency power-generating windows and highlights an application uniquely benefiting from excitonic electronics.

  15. Feasibility Study of Economics and Performance of Solar Photovoltaics in the Commonwealth of Puerto Rico

    SciTech Connect (OSTI)

    Salasovich, J.; Mosey, G.

    2011-03-01

    This report presents the results of an assessment of the technical and economic feasibility of deploying a photovoltaics (PV) system on brownfield sites in the Commonwealth of Puerto Rico. All of the assessed sites are landfills. The sites were assessed for possible PV installations. The cost, performance, and site impacts of different PV options were estimated. The economics of the potential systems were analyzed using an electric rate of $0.119/kWh and incentives offered by Puerto Rico and by the serving utility, PREPA. According to the site production calculations, the most cost-effective system in terms of return on investment is the thin-film fixed-tilt technology. The report recommends financing options that could assist in the implementation of such a system.

  16. Impact of Different Economic Performance Metrics on the Perceived Value of Solar Photovoltaics

    SciTech Connect (OSTI)

    Drury, E.; Denholm, P.; Margolis, R.

    2011-10-01

    Photovoltaic (PV) systems are installed by several types of market participants, ranging from residential customers to large-scale project developers and utilities. Each type of market participant frequently uses a different economic performance metric to characterize PV value because they are looking for different types of returns from a PV investment. This report finds that different economic performance metrics frequently show different price thresholds for when a PV investment becomes profitable or attractive. Several project parameters, such as financing terms, can have a significant impact on some metrics [e.g., internal rate of return (IRR), net present value (NPV), and benefit-to-cost (B/C) ratio] while having a minimal impact on other metrics (e.g., simple payback time). As such, the choice of economic performance metric by different customer types can significantly shape each customer's perception of PV investment value and ultimately their adoption decision.

  17. Solar electric thermal hydronic (SETH) product development project

    SciTech Connect (OSTI)

    Stickney, B.L.; Sindelar, A.

    2000-10-01

    Positive Energy, Inc. received a second Technology Maturation and Commercialization Project Subcontract during the 1999 round of awards. This Subcontract is for the purpose of further aiding Positive Energy, Inc. in preparing its Solar Electric Thermal Hydronic (SETH) control and distribution package for market introduction. All items of this subcontracted project have been successfully completed. This Project Report contains a summary of the progress made during the SETH Development Project (the Project) over the duration of the 1999 Subcontract. It includes a description of the effort performed and the results obtained in the pursuit of intellectual property protection and development of product documentation for the end users. This report also summarizes additional efforts taken by and for the SETH project outside of the Subcontract. It presents a chronology of activities over the duration of the Subcontract, and includes a few selected sample copies of documents offered as evidence of their success.

  18. New Jersey Solar Power LLC NJ Solar Power | Open Energy Information

    Open Energy Info (EERE)

    Solar Power LLC NJ Solar Power Jump to: navigation, search Name: New Jersey Solar Power LLC (NJ Solar Power) Place: New Jersey Sector: Solar Product: A photovoltaic engineering...

  19. Baoding Solar Thermal Equipment Company | Open Energy Information

    Open Energy Info (EERE)

    Equipment Company Place: Baoding, Hebei Province, China Sector: Solar Product: Solar water heating system manufacturer. Coordinates: 38.855011, 115.480217 Show Map Loading...

  20. Canrom Photovoltaics Inc | Open Energy Information

    Open Energy Info (EERE)

    Canrom Photovoltaics Inc Jump to: navigation, search Name: Canrom Photovoltaics Inc Place: Niagara Falls, New York Zip: 14305 Sector: Solar Product: Developer of a thin-film CdTe...

  1. Photovoltaic Cell Structure Basics | Department of Energy

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

    Cell Structure Basics Photovoltaic Cell Structure Basics August 19, 2013 - 4:50pm Addthis The actual structural design of a photovoltaic (PV), or solar cell, depends on the ...

  2. Photovoltaic Cell Basics | Department of Energy

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

    Cell Basics Photovoltaic Cell Basics August 16, 2013 - 4:53pm Addthis Photovoltaic (PV) cells, or solar cells, take advantage of the photoelectric effect to produce electricity. PV ...

  3. ULTRA BARRIER TOPSHEET (UBT) FOR FLEXIBLE PHOTOVOLTAICS

    SciTech Connect (OSTI)

    DeScioli, Derek

    2013-06-01

    This slide-show presents 3M photovoltaic-related products, particularly flexible components. Emphasis is on the 3M Ultra Barrier Solar Films. Topics covered include reliability and qualification testing and flexible photovoltaic encapsulation costs.

  4. Thermally conductive alumina/organic composites for photovoltaic concentrator cell isolation

    SciTech Connect (OSTI)

    Beavis, L.C.; Panitz, J.K.G.; Sharp, D.J.

    1988-01-01

    Electrophoretically deposited styrene-acrylate films were studied. These yield marginally useful thermal conductivities of 0.1--0.2 watts/meter-Kelvin, but have useful dielectric strengths over 2500 volts for 40 micrometer thick coatings. Thin, 25 micrometer, coatings of anodically grown Al/sub 2/O/sub 3/ films were also investigated. These films have thermal conductivities of approximately 6--8 watts/meter-Kelvin. Although these Al/sub 2/O/sub 3/ films have greater thermal conductivity than the polymer films, they exhibit porosity which typically limits their dielectric strength to less than 1000 volts. In the current study we have determined that styrene-acrylate can be electrophoretically deposited in porous anodic aluminum oxide films to form an alumina-organic composite with improved electrical breakdown strengths as well as higher thermal conductivity than styrene-acrylate films. 7 refs., 2 tabs.

  5. Impacts of Variability and Uncertainty in Solar Photovoltaic Generation at Multiple Timescales

    SciTech Connect (OSTI)

    Ela, E.; Diakov, V.; Ibanez, E.; Heaney, M.

    2013-05-01

    The characteristics of variability and uncertainty of PV solar power have been studied extensively. These characteristics can create challenges for system operators who must ensure a balance between generation and demand while obeying power system constraints at the lowest possible cost. A number of studies have looked at the impact of wind power plants, and some recent studies have also included solar PV. The simulations that are used in these studies, however, are typically fixed to one time resolution. This makes it difficult to analyze the variability across several timescales. In this study, we use a simulation tool that has the ability to evaluate both the economic and reliability impacts of PV variability and uncertainty at multiple timescales. This information should help system operators better prepare for increases of PV on their systems and develop improved mitigation strategies to better integrate PV with enhanced reliability. Another goal of this study is to understand how different mitigation strategies and methods can improve the integration of solar power more reliably and efficiently.

  6. An overview of water disinfection in developing countries and the potential for solar thermal water pasteurization

    SciTech Connect (OSTI)

    Burch, J.; Thomas, K.E.

    1998-01-01

    This study originated within the Solar Buildings Program at the U.S. Department of Energy. Its goal is to assess the potential for solar thermal water disinfection in developing countries. In order to assess solar thermal potential, the alternatives must be clearly understood and compared. The objectives of the study are to: (a) characterize the developing world disinfection needs and market; (b) identify competing technologies, both traditional and emerging; (c) analyze and characterize solar thermal pasteurization; (d) compare technologies on cost-effectiveness and appropriateness; and (e) identify research opportunities. Natural consequences of the study beyond these objectives include a broad knowledge of water disinfection problems and technologies, introduction of solar thermal pasteurization technologies to a broad audience, and general identification of disinfection opportunities for renewable technologies.

  7. Midtemperature solar systems test facility predictions for thermal performance based on test data: solar kinetics T-600 solar collector with FEK 244 reflector surface

    SciTech Connect (OSTI)

    Harrison, T.D.

    1981-04-01

    Sandia National Laboratories, Albuquerque (SNLA), is currently conducting a program to predict the performance and measure the characteristics of commercially available solar collectors that have the potential for use in industrial process heat and enhanced oil recovery applications. The thermal performance predictions for the Solar Kinetics T-600 solar line-focusing parabolic trough collector are presented for three output temperatures at five cities in the US. (WHK)

  8. Photovoltaic power generation system free of bypass diodes

    DOE Patents [OSTI]

    Lentine, Anthony L.; Okandan, Murat; Nielson, Gregory N.

    2015-07-28

    A photovoltaic power generation system that includes a solar panel that is free of bypass diodes is described herein. The solar panel includes a plurality of photovoltaic sub-modules, wherein at least two of photovoltaic sub-modules in the plurality of photovoltaic sub-modules are electrically connected in parallel. A photovoltaic sub-module includes a plurality of groups of electrically connected photovoltaic cells, wherein at least two of the groups are electrically connected in series. A photovoltaic group includes a plurality of strings of photovoltaic cells, wherein a string of photovoltaic cells comprises a plurality of photovoltaic cells electrically connected in series. The strings of photovoltaic cells are electrically connected in parallel, and the photovoltaic cells are microsystem-enabled photovoltaic cells.

  9. Thermal and Electrical Effects of Partial Shade in Monolithic Thin-Film Photovoltaic Modules: Preprint

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

    | SciTech Connect Journal Article: Thermal Signatures of The Kondo Volume Collapse in Cerium Citation Details In-Document Search Title: Thermal Signatures of The Kondo Volume Collapse in Cerium X-ray diffraction measurements of cerium in the vicinity of the isostructural {gamma}-{alpha} transition have been performed with high precision and accuracy from room temperature to almost 800 K. The disputed location of the critical point has been found to occur at 1.5 {+-} 0.1 GPa and 480 {+-} 10

  10. The Solar Thermal Design Assistance Center report of its activities and accomplishments in Fiscal Year 1993

    SciTech Connect (OSTI)

    Menicucci, D.F.

    1994-03-01

    The Solar Thermal Design Assistance Center (STDAC) at Sandia National Laboratories is a resource provided by the US Department of Energy`s Solar Thermal Program. Its major objectives are to accelerate the use of solar thermal systems through (a) direct technical assistance to users, (b) cooperative test, evaluation, and development efforts with private industry, and (c) educational outreach activities. This report outlines the major activities and accomplishments of the STDAC in Fiscal Year 1993. The report also contains a comprehensive list of persons who contacted the STDAC by telephone for information or technical consulting.

  11. Science Highlights- Center for Solar and Thermal Energy Conversion

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

    1 - Abstracts and Highlight Slides Efficiency of Thermoelectric Energy Conversion in Biphenyl-dithiol Junctions: Effect of Electron-Phonon Interactions Plasmonic Backscattering Enhanced Inverted Photovoltaics Femtosecond Laser-induced Nanostructure Formation in Sb2Te3 Ideal Diode Equation For Organic Heterojunctions. I and II

  12. Charge transport in zirconium doped anatase nanowires dye-sensitized solar cells: Trade-off between lattice strain and photovoltaic parameters

    SciTech Connect (OSTI)

    Archana, P. S.; Gupta, Arunava; Yusoff, Mashitah M.; Jose, Rajan

    2014-10-13

    Zirconium (Zr) is doped up to 5 at.?% in anatase TiO{sub 2} nanowires by electrospinning and used as working electrode in dye-sensitized solar cells. Variations observed in the photovoltaic parameters were correlated by electrochemical impedance spectroscopy, open circuit voltage decay, and X-ray diffraction measurements. Results show that homovalent substitution of Zr in TiO{sub 2} increased the chemical capacitance and electron diffusion coefficient which in turn decreased charge transport resistance and charge transit time. However, lattice strain due to size mismatch between the Zr{sup 4+} and Ti{sup 4+} ions decreased open circuit voltage and fill factor thereby setting a trade-off between doping concentration and photovoltaic properties.

  13. PROJECT PROFILE: Enabling High Concentration Photovoltaics with 50%

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

    Efficient Solar Cells | Department of Energy Enabling High Concentration Photovoltaics with 50% Efficient Solar Cells PROJECT PROFILE: Enabling High Concentration Photovoltaics with 50% Efficient Solar Cells Funding Opportunity: SuNLaMP SunShot Subprogram: Photovoltaics Location: National Renewable Energy Laboratory, Golden, CO Amount Awarded: $8,000,000 The efficiency and concentration of III-V multi-junction solar cells are essential to reduce the cost of high concentration photovoltaic

  14. Project Profile: Low-Cost Solar Thermal Collector

    Broader source: Energy.gov [DOE]

    SunTrough, under the Baseload CSP FOA, is developing a new class of solar concentrators with geometries and manufacturability that can significantly reduce the fully installed cost of the solar collector field.

  15. Cost-Effective Silicon Wafers for Solar Cells: Direct Wafer Enabling Terawatt Photovoltaics

    SciTech Connect (OSTI)

    2010-01-15

    Broad Funding Opportunity Announcement Project: 1366 is developing a process to reduce the cost of solar electricity by up to 50% by 2020from $0.15 per kilowatt hour to less than $0.07. 1366s process avoids the costly step of slicing a large block of silicon crystal into wafers, which turns half the silicon to dust. Instead, the company is producing thin wafers directly from molten silicon at industry-standard sizes, and with efficiencies that compare favorably with todays state-of-the-art technologies. 1366s wafers could directly replace wafers currently on the market, so there would be no interruptions to the delivery of these products to market. As a result of 1366s technology, the cost of silicon wafers could be reduced by 80%.

  16. Photovoltaic System Fault Detection

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

    Photovoltaic System Fault Detection and Diagnostics using Laterally Primed Adaptive Resonance Theory Neural Network C. Birk Jones, Joshua S. Stein, Sigifredo Gonzalez, and Bruce H. King Sandia National Laboratories, Albuquerque, NM, 87185, U.S.A Abstract-Cost effective integration of solar photovoltaic (PV) systems requires increased reliability. This can be achieved with a robust fault detection and diagnostic (FDD) tool that auto- matically discovers faults. This paper introduces the Laterally

  17. NREL: Photovoltaics Research - Company Partners in Photovoltaic

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

    Manufacturing R&D Company Partners in Photovoltaic Manufacturing R&D More than 40 private-sector companies partnered with NREL on successful efforts within the PV Manufacturing R&D Project. They included manufacturers of crystalline silicon, thin-film, and concentrator solar technologies. The companies are listed below. Advanced Energy Systems Alpha Solarco ASE Americas AstroPower/GE Energy Boeing Aerospace BP Solar Cronar Crystal Systems Dow Corning Energy Conversion Devices

  18. Research and Development for Novel Thermal Energy Storage Systems (TES) for Concentrating Solar Power (CSP)

    SciTech Connect (OSTI)

    Faghri, Amir; Bergman, Theodore L; Pitchumani, Ranga

    2013-09-26

    The overall objective was to develop innovative heat transfer devices and methodologies for novel thermal energy storage systems for concentrating solar power generation involving phase change materials (PCMs). Specific objectives included embedding thermosyphons and/or heat pipes (TS/HPs) within appropriate phase change materials to significantly reduce thermal resistances within the thermal energy storage system of a large-scale concentrating solar power plant and, in turn, improve performance of the plant. Experimental, system level and detailed comprehensive modeling approaches were taken to investigate the effect of adding TS/HPs on the performance of latent heat thermal energy storage (LHTES) systems.

  19. Directors - Center for Solar and Thermal Energy Conversion

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

    Uher has given numerous invited talks on the subject of thermal conductivity and ... Most recently, he has been involved with investigating the thermal transport in material ...

  20. 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...

  1. Agua Caliente Solar Project | Open Energy Information

    Open Energy Info (EERE)

    Jump to: navigation, search Name Agua Caliente Solar Project Facility 290-megawatt photovoltaic solar generating facility Sector Solar Facility Type Utility scale solar Owner...

  2. AV Solar Ranch I Solar Power Plant | Open Energy Information

    Open Energy Info (EERE)

    AV Solar Ranch I Solar Power Plant Jump to: navigation, search Name AV Solar Ranch I Solar Power Plant Facility AV Solar Ranch I Sector Solar Facility Type Photovoltaic Developer...

  3. Crystalline Silicon Photovoltaics Research | Department of Energy

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

    Crystalline Silicon Photovoltaics Research Crystalline Silicon Photovoltaics Research DOE supports crystalline silicon photovoltaic (PV) research and development efforts that lead to market-ready technologies. Below are a list of the projects, summary of the benefits, and discussion on the production and manufacturing of this solar technology. Background Crystalline silicon PV cells are the most common solar cells used in commercially available solar panels, representing 87% of world PV cell

  4. Topaz Solar Farm Solar Power Plant | Open Energy Information

    Open Energy Info (EERE)

    Topaz Solar Farm Sector Solar Facility Type Photovoltaic Developer OptiSolar Location San Luis Obispo County, California Coordinates 35.3102296, -120.4357631 Show Map...

  5. Rapid Solar-Thermal Conversion of Biomass to Syngas - Energy Innovation

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

    Portal Biomass and Biofuels Biomass and Biofuels Find More Like This Return to Search Rapid Solar-Thermal Conversion of Biomass to Syngas Production of synthesis gas or hydrogen by gasification or pyrolysis of biological feedstocks using solar-thermal energy. University of Colorado Contact CU About This Technology Technology Marketing Summary The invention provides processes that perform biomass gasification or pyrolysis for production of hydrogen, synthesis gas, liquid fuels, or other

  6. Unglazed transpired solar collector having a low thermal-conductance absorber

    DOE Patents [OSTI]

    Christensen, Craig B.; Kutscher, Charles F.; Gawlik, Keith M.

    1997-01-01

    An unglazed transpired solar collector using solar radiation to heat incoming air for distribution, comprising an unglazed absorber formed of low thermal-conductance material having a front surface for receiving the solar radiation and openings in the unglazed absorber for passage of the incoming air such that the incoming air is heated as it passes towards the front surface of the absorber and the heated air passes through the openings in the absorber for distribution.

  7. Unglazed transpired solar collector having a low thermal-conductance absorber

    DOE Patents [OSTI]

    Christensen, C.B.; Kutscher, C.F.; Gawlik, K.M.

    1997-12-02

    An unglazed transpired solar collector using solar radiation to heat incoming air for distribution, comprises an unglazed absorber formed of low thermal-conductance material having a front surface for receiving the solar radiation and openings in the unglazed absorber for passage of the incoming air such that the incoming air is heated as it passes towards the front surface of the absorber and the heated air passes through the openings in the absorber for distribution. 3 figs.

  8. Tax Revenue and Job Benefits from Solar Thermal Power Plants in Nye County

    SciTech Connect (OSTI)

    Kuver, Walt

    2009-11-10

    The objective of this report is to establish a common understanding of the financial benefits that the County will receive as solar thermal power plants are developed in Amargosa Valley. Portions of the tax data and job estimates in the report were provided by developers Solar Millennium and Abengoa Solar in support of the effort. It is hoped that the resulting presented data will be accepted as factual reference points for the ensuing debates and financial decisions concerning these development projects.

  9. Residential Solar Investment Program

    Broader source: Energy.gov [DOE]

    In March 2012, the CT Green Bank* unveiled its solar photovoltaic residential investment program with the ultimate goal to support 30 megawatts of residential solar photovoltaics (PV). HB 6838...

  10. Taofang Zeng | Solid State Solar Thermal Energy Conversion

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

    Taofang Zeng Alumni Taofang Zeng Director of Center of Thermal Energy Systems, Huaneng Group Corporation, China

  11. Solar Technologies | Open Energy Information

    Open Energy Info (EERE)

    Place: Dubai, United Arab Emirates Sector: Solar Product: Dubai-based solar photovoltaic module manufacturing company. References: Solar Technologies1 This article is a...

  12. Nanocrystal and Molecular Precursors for Photovoltaic Applications...

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

    Nanocrystal and Molecular Precursors for Photovoltaic Applications The objective in this proposal is to identify factors that limit the efficiency of nanocrystal based solar cells...

  13. Photovoltaics Economic Calculator (United States) | Open Energy...

    Open Energy Info (EERE)

    (United States) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Photovoltaics Economic Calculator (United States) Focus Area: Solar Topics: System & Application...

  14. Photovoltaics for Residential Buildings Webinar | Department...

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

    Watch a recording of National Renewable Energy Laboratory (NREL) Senior Engineer Otto VanGeet's Jan. 25, 2011, presentation about using solar photovoltaic (PV) systems to provide ...

  15. NREL: Photovoltaics Research - Keith A. Emery

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

    Responsivity Measurements," Proc. 2nd World Conference and Exhibition on Photovoltaic Solar Energy Conversion, Joint Research Center report EUR 18656, p. 2298, 1998. T. Moriarty...

  16. Cost Competitive Electricity from Photovoltaic Concentrators...

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

    Cost Competitive Electricity from Photovoltaic Concentrators Called 'Imminent' July 13, ... solar cells will reduce the cost of electricity from sunlight to competitive levels ...

  17. Sandia Energy - Microsystems Enabled Photovoltaics (MEPV)

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

    About MEPV Researchers at Sandia National Laboratories are pioneering solar photovoltaic (PV) technologies that are cheaper to produce and easier to install than...

  18. SERC Photovoltaics for Residential Buildings Webinar Transcript

    Broader source: Energy.gov [DOE]

    A presentation sponsored by the U.S. Department of Energy about using solar photovoltaics (PV) systems to provide electricity for homes.

  19. Midtemperature Solar Systems Test Facility predictions for thermal performance of the Suntec solar collector with heat-formed glass reflector surface

    SciTech Connect (OSTI)

    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.

  20. Thermal stability of photovoltaic a-Si:H determined by neutron reflectometry

    SciTech Connect (OSTI)

    Qviller, A. J. Haug, H.; You, C. C.; Hasle, I. M.; Marstein, E. S.; Frommen, C.; Hauback, B. C.; Dennison, A. J. C.; Vorobiev, A.; streng, E.; Fjellvg, H.; Hjrvarsson, B.

    2014-12-08

    Neutron and X-ray reflectometry were used to determine the layer structure and hydrogen content of thin films of amorphous silicon (a-Si:H) deposited onto crystalline silicon (Si) wafers for surface passivation in solar cells. The combination of these two reflectometry techniques is well suited for non-destructive probing of the structure of a-Si:H due to being able to probe buried interfaces and having sub-nanometer resolution. Neutron reflectometry is also unique in its ability to allow determination of density gradients of light elements such as hydrogen (H). The neutron scattering contrast between Si and H is strong, making it possible to determine the H concentration in the deposited a-Si:H. In order to correlate the surface passivation properties supplied by the a-Si:H thin films, as quantified by obtainable effective minority carrier lifetime, photoconductance measurements were also performed. It is shown that the minority carrier lifetime falls sharply when H has been desorbed from a-Si:H by annealing.

  1. Alternating Current Photovoltaic Building Block - Energy Innovation Portal

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

    Solar Photovoltaic Solar Photovoltaic Find More Like This Return to Search Alternating Current Photovoltaic Building Block Sandia National Laboratories Contact SNL About This Technology Publications: PDF Document Publication Market Sheet (891 KB) Technology Marketing Summary This technology provides a fully integrated and self-containing alternating current (AC) photovoltaic (PV) Building Block device and method that allows photovoltaic applications to become true plug-and-play devices. The

  2. Research Program - Center for Solar and Thermal Energy Conversion

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

    In the Inorganic PV thrust, we develop nanostructured materials architectures for solar energy conversion by engineering absorption and transport properties not available in the bulk. In particular, we aim to exploit unique quantum effects at the nanoscale which are promising for the realization of new paradigms in solar energy conversion such as intermediate band or hot carrier solar cells. Thrust Leaders: Prof. Rachel Goldman (MSE)&nbspand Prof. Jamie Phillips (EECS) Recent Publications -

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

    Broader source: Energy.gov [DOE]

    The sixth volume of the Building America Best Practices Series presents information that is useful throughout the U.S. for enhancing the energy efficiency practices in the specific climate zones that are presented in each of the volumes.

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

    SciTech Connect (OSTI)

    2007-06-01

    The sixth volume of the Building America Best Practices Series presents information that is useful throughout the U.S. for enhancing the energy efficiency practices in the specific climate zones that are presented in each of the volumes.

  5. News - Center for Solar and Thermal Energy Conversion

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

    yield better solar cells Recycling waste heat into energy: Researchers take a step toward more efficient conversion ... Aligning Polymers for High-Performance Strategy ...

  6. OLADE-Solar Thermal World Portal | Open Energy Information

    Open Energy Info (EERE)

    - Solar Hot Water User Interface: Website Website: www.solarthermalworld.org Cost: Free UN Region: Caribbean, South America Language: "English, Spanish; Castilian" is not in...

  7. Wind Issues in Solar Thermal Performance Ratings: Preprint

    SciTech Connect (OSTI)

    Burch, J.; Casey, R.

    2009-04-01

    We suggest that wind bias against unglazed solar water heaters be mitigated by using a calibrated collector model to derive a wind correction to the measured efficiency curve.

  8. SolarPower Restoration Systems Inc | Open Energy Information

    Open Energy Info (EERE)

    Solar Product: SolarPower Restoration Systems is pursuing Building Integrated Photovoltaics (BIPV) systems and large scale Photovoltaic Power (PV) Array Systems over concrete...

  9. Loan Guarantees for Three California PV Solar Plants Expected...

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

    in conditional loan guarantees to three California photovoltaic solar power plants today. ... Billion in Loans for Three California Photovoltaic Solar Power Plants Department of ...

  10. Department of Energy Offers Support for Arizona Solar Project...

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

    The loan guarantee will support the construction of a 290-megawatt photovoltaic solar ... The project sponsor, NRG Solar, estimates the project will be the largest photovoltaic ...

  11. Frequently Asked Questions About Solar Ready Vets | Department...

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

    preparing them for careers as solar photovoltaic (PV) system installers, sales ... nationwide in areas such as solar photovoltaic (PV) installation, PV technical sales, ...

  12. Sandia Energy - Launch of Solar Testing Site in Vermont

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

    Home Renewable Energy Energy Facilities Partnership News SunShot News & Events Photovoltaic Solar Solar Newsletter Photovoltaic Regional Testing Center (PV RTC) Launch of...

  13. Department of Veterans Affairs, FONSI - Ground mounted solar...

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

    Ground mounted solar photovoltaic power at San Joaquin National Cemetery Department of Veterans Affairs, FONSI - Ground mounted solar photovoltaic power at San Joaquin National ...

  14. General volume sizing strategy for thermal storage system using phase change material for concentrated solar thermal power plant

    SciTech Connect (OSTI)

    Xu, Ben; Li, Peiwen; Chan, Cholik; Tumilowicz, Eric

    2014-12-18

    With an auxiliary large capacity thermal storage using phase change material (PCM), Concentrated Solar Power (CSP) is a promising technology for high efficiency solar energy utilization. In a thermal storage system, a dual-media thermal storage tank is typically adopted in industry for the purpose of reducing the use of the heat transfer fluid (HTF) which is usually expensive. While the sensible heat storage system (SHSS) has been well studied, a dual-media latent heat storage system (LHSS) still needs more attention and study. The volume sizing of the thermal storage tank, considering daily cyclic operations, is of particular significance. In this paper, a general volume sizing strategy for LHSS is proposed, based on an enthalpy-based 1D transient model. One example was presented to demonstrate how to apply this strategy to obtain an actual storage tank volume. With this volume, a LHSS can supply heat to a thermal power plant with the HTF at temperatures above a cutoff point during a desired 6 hours of operation. This general volume sizing strategy is believed to be of particular interest for the solar thermal power industry.

  15. General volume sizing strategy for thermal storage system using phase change material for concentrated solar thermal power plant

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

    Xu, Ben; Li, Peiwen; Chan, Cholik; Tumilowicz, Eric

    2014-12-18

    With an auxiliary large capacity thermal storage using phase change material (PCM), Concentrated Solar Power (CSP) is a promising technology for high efficiency solar energy utilization. In a thermal storage system, a dual-media thermal storage tank is typically adopted in industry for the purpose of reducing the use of the heat transfer fluid (HTF) which is usually expensive. While the sensible heat storage system (SHSS) has been well studied, a dual-media latent heat storage system (LHSS) still needs more attention and study. The volume sizing of the thermal storage tank, considering daily cyclic operations, is of particular significance. In thismore » paper, a general volume sizing strategy for LHSS is proposed, based on an enthalpy-based 1D transient model. One example was presented to demonstrate how to apply this strategy to obtain an actual storage tank volume. With this volume, a LHSS can supply heat to a thermal power plant with the HTF at temperatures above a cutoff point during a desired 6 hours of operation. This general volume sizing strategy is believed to be of particular interest for the solar thermal power industry.« less

  16. Best Practices for Siting Solar Photovoltaics on Municipal Solid Waste Landfills. A Study Prepared in Partnership with the Environmental Protection Agency for the RE-Powering America's Land Initiative: Siting Renewable Energy on Potentially Contaminated Land and Mine Sites

    SciTech Connect (OSTI)

    Kiatreungwattana, K.; Mosey, G.; Jones-Johnson, S.; Dufficy, C.; Bourg, J.; Conroy, A.; Keenan, M.; Michaud, W.; Brown, K.

    2013-04-01

    The Environmental Protection Agency and the National Renewable Energy Laboratory developed this best practices document to address common technical challenges for siting solar photovoltaics (PV) on municipal solid waste (MSW) landfills. The purpose of this document is to promote the use of MSW landfills for solar energy systems. Closed landfills and portions of active landfills with closed cells represent thousands of acres of property that may be suitable for siting solar photovoltaics (PV). These closed landfills may be suitable for near-term construction, making these sites strong candidate to take advantage of the 30% Federal Business Energy Investment Tax Credit. It was prepared in response to the increasing interest in siting renewable energy on landfills from solar developers; landfill owners; and federal, state, and local governments. It contains examples of solar PV projects on landfills and technical considerations and best practices that were gathered from examining the implementation of several of these projects.

  17. Thermal control system and method for a passive solar storage wall

    DOE Patents [OSTI]

    Ortega, Joseph K. E.

    1984-01-01

    The invention provides a system and method for controlling the storing and elease of thermal energy from a thermal storage wall wherein said wall is capable of storing thermal energy from insolation of solar radiation. The system and method includes a device such as a plurality of louvers spaced a predetermined distance from the thermal wall for regulating the release of thermal energy from the thermal wall. This regulating device is made from a material which is substantially transparent to the incoming solar radiation so that when it is in any operative position, the thermal storage wall substantially receives all of the impacting solar radiation. The material in the regulating device is further capable of being substantially opaque to thermal energy so that when the device is substantially closed, thermal release of energy from the storage wall is substantially minimized. An adjustment device is interconnected with the regulating mechanism for selectively opening and closing it in order to regulate the release of thermal energy from the wall.

  18. Midtemperature solar systems test facility predictions for thermal performance based on test data: Sun-Heet nontracking solar collector

    SciTech Connect (OSTI)

    Harrison, T.D.

    1981-03-01

    Sandia National Laboratories, Albuquerque (SNLA), is currently conducting a program to predict the performance and measure the characteristics of commercially available solar collectors that have the potential for use in industrial process heat and enhanced oil recovery applications. The thermal performance predictions for the Sun-Heet nontracking, line-focusing parabolic trough collector at five cities in the US are presented. (WHK)

  19. Salem Electric- Photovoltaic Rebate Program

    Broader source: Energy.gov [DOE]

    Salem Electric offers a rebate to residential customers who install solar photovoltaic (PV) systems. The rebate offered is $600 for the first three kilowatts (kWs) installed and $300/kW for any...

  20. Denver International Airport Photovoltaic System

    Broader source: Energy.gov [DOE]

    The Denver International Airport (DIA) features a 2-megawatt (MW) photovoltaic (PV) system. DIA also hosts to a second 1.6-MW system. Denver is a Solar America City.

  1. Photovoltaic Materials

    SciTech Connect (OSTI)

    Duty, C.; Angelini, J.; Armstrong, B.; Bennett, C.; Evans, B.; Jellison, G. E.; Joshi, P.; List, F.; Paranthaman, P.; Parish, C.; Wereszczak, A.

    2012-10-15

    The goal of the current project was to help make the US solar industry a world leader in the manufacture of thin film photovoltaics. The overall approach was to leverage ORNL’s unique characterization and processing technologies to gain a better understanding of the fundamental challenges for solar cell processing and apply that knowledge to targeted projects with industry members. ORNL has the capabilities in place and the expertise required to understand how basic material properties including defects, impurities, and grain boundaries affect the solar cell performance. ORNL also has unique processing capabilities to optimize the manufacturing process for fabrication of high efficiency and low cost solar cells. ORNL recently established the Center for Advanced Thin-film Systems (CATS), which contains a suite of optical and electrical characterization equipment specifically focused on solar cell research. Under this project, ORNL made these facilities available to industrial partners who were interested in pursuing collaborative research toward the improvement of their product or manufacturing process. Four specific projects were pursued with industrial partners: Global Solar Energy is a solar industry leader in full scale production manufacturing highly-efficient Copper Indium Gallium diSelenide (CIGS) thin film solar material, cells and products. ORNL worked with GSE to develop a scalable, non-vacuum, solution technique to deposit amorphous or nanocrystalline conducting barrier layers on untextured stainless steel substrates for fabricating high efficiency flexible CIGS PV. Ferro Corporation’s Electronic, Color and Glass Materials (“ECGM”) business unit is currently the world’s largest supplier of metallic contact materials in the crystalline solar cell marketplace. Ferro’s ECGM business unit has been the world's leading supplier of thick film metal pastes to the crystalline silicon PV industry for more than 30 years, and has had operational cells and modules in the field for 25 years. Under this project, Ferro leveraged world leading analytical capabilities at ORNL to characterize the paste-to-silicon interface microstructure and develop high efficiency next generation contact pastes. Ampulse Corporation is developing a revolutionary crystalline-silicon (c-Si) thin-film solar photovoltaic (PV) technology. Utilizing uniquely-textured substrates and buffer materials from the Oak Ridge National Laboratory (ORNL), and breakthroughs in Hot-Wire Chemical Vapor Deposition (HW-CVD) techniques in epitaxial silicon developed at the National Renewable Energy Laboratory (NREL), Ampulse is creating a solar technology that is tunable in silicon thickness, and hence in efficiency and economics, to meet the specific requirements of multiple solar PV applications. This project focused on the development of a high rate deposition process to deposit Si, Ge, and Si1-xGex films as an alternate to hot-wire CVD. Mossey Creek Solar is a start-up company with great expertise in the solar field. The primary interest is to create and preserve jobs in the solar sector by developing high-yield, low-cost, high-efficiency solar cells using MSC-patented and -proprietary technologies. The specific goal of this project was to produce large grain formation in thin, net-shape-thickness mc-Si wafers processed with high-purity silicon powder and ORNL's plasma arc lamp melting without introducing impurities that compromise absorption coefficient and carrier lifetime. As part of this project, ORNL also added specific pieces of equipment to enhance our ability to provide unique insight for the solar industry. These capabilities include a moisture barrier measurement system, a combined physical vapor deposition and sputtering system dedicated to cadmium-containing deposits, adeep level transient spectroscopy system useful for identifying defects, an integrating sphere photoluminescence system, and a high-speed ink jet printing system. These tools were combined with others to study the effect of defects on the performance of crystalline silicon and thin film solar cells, to explore non-vacuum ink-based approaches to solar cell production, as well as large-scale and low-cost deposition and processing of thin film CdTe material.

  2. PVT -- A photovoltaic/thermal concentrator total energy system: Final phase 1 project report. Building opportunities in the U.S. for photovoltaics (PV:BONUS) Two

    SciTech Connect (OSTI)

    1998-12-31

    United Solar completed its Phase 1 report and its proposal for Phase 2 of the PVBONUS Two program at the end of March 1998. At the same time, it also completed and submitted a proposal to the California Energy Commission PIER program for additional funding to cost-share development and testing of a pre-production model of the PVT-14. It was unsuccessful in both of these proposed efforts. While waiting for the proposal decisions, work continued in April and May to analyze the system design and component decisions described below. This document is a final summation report on the Phase 1 effort of the PVBONUS Two program that describes the key technical issues that United Solar and its subcontractor, Industrial Solar Technology Corporation, worked on in preparation of a Phase 2 award. The decisions described were ones that will guide the design and fabrication of a pre-production prototype of a 1500:1 mirrored concentrator with gallium arsenide cells when United solar resumes its development work. The material below is organized by citing the key components that underwent a design review, what the company considered, what was decided, the name of the expected supplier, if not to be produced in-house, and some information about expected costs. The cost figures given are usually budgetary estimates, not the result of firm quotations or extensive analysis.

  3. Performance of a Thermally Stable Polyaromatic Hydrocarbon in a Simulated Concentrating Solar Power Loop

    SciTech Connect (OSTI)

    McFarlane, Joanna; Bell, Jason R; Felde, David K; Joseph III, Robert Anthony; Qualls, A L; Weaver, Samuel P

    2014-01-01

    Polyaromatic hydrocarbon thermal fluids showing thermally stability to 600 C have been tested for solar thermal-power applications. Although static thermal tests showed promising results for 1-phenylnaphthalene, loop testing at temperatures to 450 C indicated that the fluid isomerized and degraded at a slow rate. In a loop with a temperature high enough to drive the isomerization, the higher melting point byproducts tended to condense onto cooler surfaces. So, as experienced in loop operation, eventually the internal channels of cooler components in trough solar electric generating systems, such as the waste heat rejection exchanger, may become coated or clogged affecting loop performance. Thus, pure 1-phenylnaphthalene, without addition of stabilizers, does not appear to be a fluid that would have a sufficiently long lifetime (years to decades) to be used in a loop at the temperatures greater than 500 C. The performance of a concentrating solar loop using high temperature fluids was modeled based on the National Renewable Laboratory Solar Advisory Model. It was determined that a solar-to-electricity efficiency of up to 30% and a capacity factor of near 60% could be achieved using a high efficiency collector and 12 h thermal energy storage.

  4. Buildings Energy Data Book: 5.8 Active Solar Systems

    Buildings Energy Data Book [EERE]

    Solar Collector Shipments, by Type and Market (Thousand SF, unless noted) (1) Type 1980 1990 2000 2009 Solar Thermal Collectors (2) Residential N.A. Commercial N.A. Industrial N.A. Utility N.A. Other N.A. (4) Photovoltaics (kW) (5) Note(s): Source(s): (6) 6,897 13,837 88,221 1,282,560 1) Shipments for 1980-2000 include imports and exports; 2008 shipments are domestic only. 2) Solar thermal collectors: receive solar radiation, convert it to thermal energy, and are typically used forspace

  5. Energy and economic assessment of desiccant cooling systems coupled with single glazed air and hybrid PV/thermal solar collectors for applications in hot and humid climate

    SciTech Connect (OSTI)

    Beccali, Marco; Finocchiaro, Pietro; Nocke, Bettina

    2009-10-15

    This paper presents a detailed analysis of the energy and economic performance of desiccant cooling systems (DEC) equipped with both single glazed standard air and hybrid photovoltaic/thermal (PV/t) collectors for applications in hot and humid climates. The use of 'solar cogeneration' by means of PV/t hybrid collectors enables the simultaneous production of electricity and heat, which can be directly used by desiccant air handling units, thereby making it possible to achieve very energy savings. The present work shows the results of detailed simulations conducted for a set of desiccant cooling systems operating without any heat storage. System performance was investigated through hourly simulations for different systems and load combinations. Three configurations of DEC systems were considered: standard DEC, DEC with an integrated heat pump and DEC with an enthalpy wheel. Two kinds of building occupations were considered: office and lecture room. Moreover, three configurations of solar-assisted air handling units (AHU) equipped with desiccant wheels were considered and compared with standard AHUs, focusing on achievable primary energy savings. The relationship between the solar collector's area and the specific primary energy consumption for different system configurations and building occupation patterns is described. For both occupation patterns, sensitivity analysis on system performance was performed for different solar collector areas. Also, this work presents an economic assessment of the systems. The cost of conserved energy and the payback time were calculated, with and without public incentives for solar cooling systems. It is worth noting that the use of photovoltaics, and thus the exploitation of related available incentives in many European countries, could positively influence the spread of solar air cooling technologies (SAC). An outcome of this work is that SAC systems equipped with PV/t collectors are shown to have better performance in terms of primary energy saving than conventional systems fed by vapour compression chillers and coupled with PV cells. All SAC systems present good figures for primary energy consumption. The best performances are seen in systems with integrated heat pumps and small solar collector areas. The economics of these SAC systems at current equipment costs and energy prices are acceptable. They become more interesting in the case of public incentives of up to 30% of the investment cost (Simple Payback Time from 5 to 10 years) and doubled energy prices. (author)

  6. Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-11-01

    The U.S. Department of Energy (DOE) works with industry, academia, national laboratories, and other government agencies to advance solar photovoltaics (PV) domestically. The SunShot Initiative aims to achieve widespread, unsubsidized cost-competitiveness through an applied research and development (R&D) portfolio spanning PV materials, devices, and manufacturing technologies.

  7. Fact Sheet: Photovoltaics | Department of Energy

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

    Photovoltaics Fact Sheet: Photovoltaics The U.S. Department of Energy (DOE)'s Solar Energy Technologies Office works with industry, academia, national laboratories, and other government agencies to advance solar photovoltaics (PV), which is the direct conversion of sunlight into electricity by a semiconductor, in support of the goals of the SunShot Initiative. SunShot supports research and development to aggressively advance PV technology by improving efficiency and reliability and lowering

  8. SOLCOST - Version 3. 0. Solar energy design program for non-thermal specialists

    SciTech Connect (OSTI)

    Not Available

    1980-05-01

    The SOLCOST solar energy design program is a public domain computerized design tool intended for use by non-thermal specialists to size solar systems with a methodology based on life cycle cost. An overview of SOLCOST capabilities and options is presented. A detailed guide to the SOLCOST input parameters is included. Sample problems showing typical imput decks and resulting SOLCOST output sheets are given. Details of different parts of the analysis are appended. (MHR)

  9. Templated assembly of photoswitches significantly increases the energy-storage capacity of solar thermal fuels

    SciTech Connect (OSTI)

    Kucharski, TJ; Ferralis, N; Kolpak, AM; Zheng, JO; Nocera, DG; Grossman, JC

    2014-04-13

    Large-scale utilization of solar-energy resources will require considerable advances in energy-storage technologies to meet ever-increasing global energy demands. Other than liquid fuels, existing energy-storage materials do not provide the requisite combination of high energy density, high stability, easy handling, transportability and low cost. New hybrid solar thermal fuels, composed of photoswitchable molecules on rigid, low-mass nanostructures, transcend the physical limitations of molecular solar thermal fuels by introducing local sterically constrained environments in which interactions between chromophores can be tuned. We demonstrate this principle of a hybrid solar thermal fuel using azobenzene-functionalized carbon nanotubes. We show that, on composite bundling, the amount of energy stored per azobenzene more than doubles from 58 to 120 kJ mol(-1), and the material also maintains robust cyclability and stability. Our results demonstrate that solar thermal fuels composed of molecule-nanostructure hybrids can exhibit significantly enhanced energy-storage capabilities through the generation of template-enforced steric strain.

  10. Solid-State Solar-Thermal Energy Conversion Center (S3TEC) | U.S. DOE

    Office of Science (SC) Website

    Office of Science (SC) Solid-State Solar-Thermal Energy Conversion Center (S3TEC) Energy Frontier Research Centers (EFRCs) EFRCs Home Centers EFRC External Websites Research Science Highlights News & Events Publications History Contact BES Home Centers Solid-State Solar-Thermal Energy Conversion Center (S3TEC) Print Text Size: A A A FeedbackShare Page S<sup>3</sup>TEC Header Director Gang Chen Lead Institution Massachusetts Institute of Technology Year Established 2009

  11. High Temperature Thermal Array for Next Generation Solar Thermal Power Production

    Broader source: Energy.gov [DOE]

    This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 23–25, 2013 near Phoenix, Arizona.

  12. Photovoltaic device

    DOE Patents [OSTI]

    Reese, Jason A.; Keenihan, James R.; Gaston, Ryan S.; Kauffmann, Keith L.; Langmaid, Joseph A.; Lopez, Leonardo C.; Maak, Kevin D.; Mills, Michael E.; Ramesh, Narayan; Teli, Samar R.

    2015-06-02

    The present invention is premised upon an improved photovoltaic device ("PV device"), more particularly to an improved photovoltaic device with a multilayered photovoltaic cell assembly and a body portion joined at an interface region and including an intermediate layer, at least one interconnecting structural member, relieving feature, unique component geometry, or any combination thereof.

  13. Photovoltaic device

    DOE Patents [OSTI]

    Reese, Jason A.; Keenihan, James R.; Gaston, Ryan S.; Kauffmann, Keith L.; Langmaid, Joseph A.; Lopez, Leonardo C.; Maak, Kevin D.; Mills, Michael E.; Ramesh, Narayan; Teli, Samar R.

    2015-09-01

    The present invention is premised upon an improved photovoltaic device ("PV device"), more particularly to an improved photovoltaic device (10) with a multilayered photovoltaic cell assembly (100) and a body portion (200) joined at an interface region (410) and including an intermediate layer (500), at least one interconnecting structural member (1500), relieving feature (2500), unique component geometry, or any combination thereof.

  14. Research Overview | Solid State Solar Thermal Energy Conversion

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

    Research Overview Despite great progress in developing efficient thermal energy conversion technologies since the industrial revolution, heat-to-electricity conversion has been primarily based on thermal-mechanical systems such as steam and gas turbines and internal combustion engines. Such engines are most suitable for power generation at large scales with high power density energy sources, but their efficiency suffers when they are used for small-scale installations with low power density

  15. NREL: Photovoltaics Research - Accomplishments in Photovoltaic

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

    Manufacturing R&D Accomplishments in Photovoltaic Manufacturing R&D Successful efforts within the PV Manufacturing R&D Project were recognized by the solar industry. Key highlights from the project are summarized below. Overall, the project resulted in a more than 50% reduction in manufacturing costs and a substantial return on investment for both the U.S. government and the industries involved. A number of companies participating in the project were able to make technological

  16. Sandia Energy - Solar Glare Hazard Analysis Tool Available for...

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

    Solar Glare Hazard Analysis Tool Available for Download Home Renewable Energy Energy News News & Events Photovoltaic Solar Solar Newsletter Solar Glare Hazard Analysis Tool...

  17. Solar and Wind Contractor Licensing | Department of Energy

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

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

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

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

    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...

  19. Smart Solar Rooftops - Energy Innovation Portal

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

    Technology Marketing Summary Solar panels, or photovoltaic panels, use photovoltaic cells to create energy. These cells create direct current through absorption of sunlight's ...

  20. Nanostructured Electrodes For Organic Bulk Heterojunction Solar...

    Office of Scientific and Technical Information (OSTI)

    solar cells to improve their photovoltaic performance by enhancing their charge ... circuit current density and photovoltaic device efficiency by as much as approx10%. ...

  1. Search for: All records | SciTech Connect

    Office of Scientific and Technical Information (OSTI)

    ... structure (1) resolution (1) solar (photovoltaic), solar (thermal), phonons, thermal ... (1) solar energy solar (photovoltaic), phonons, energy storage (including ...

  2. Photovoltaics | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaics (Redirected from Photovoltaic) Jump to: navigation, search (The following text is derived from NREL's description of photovoltaic technology.)1 Photovoltaic Panels...

  3. METHODS AND SYSTEMS FOR CONCENTRATED SOLAR POWER - Energy Innovation Portal

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

    7056 Site Map Printable Version Share this resource About Search Categories (15) Advanced Materials Biomass and Biofuels Building Energy Efficiency Electricity Transmission Energy Analysis Energy Storage Geothermal Hydrogen and Fuel Cell Hydropower, Wave and Tidal Industrial Technologies Solar Photovoltaic Solar Thermal Startup America Vehicles and Fuels Wind Energy Partners (27) Visual Patent Search Success Stories Find More Like This Return to Search METHODS AND SYSTEMS FOR CONCENTRATED SOLAR

  4. PROJECT PROFILE: Concentrating Solar Power in a SunShot Future (SuNLaMP) |

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

    Department of Energy Renewable Energy Laboratory, Golden, CO SunShot Award Amount: $612,500 This project will investigate concentrating solar power (CSP) and its ability to increase the overall penetration of solar energy while lessening the variability impacts of solar photovoltaics (PV). CSP is unique among solar technologies in that it can provide dispatchable energy through high-efficiency thermal energy storage. Researchers at the National Renewable Energy Laboratory (NREL) will analyze

  5. Solar Ready Vets | Department of Energy

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

    The SunShot Initiative's Solar Ready Vets program connects our nation's skilled veterans to the solar energy industry, preparing them for careers as solar photovoltaic (PV) system ...

  6. High Penetration Solar Deployment Funding Opportunity | Department...

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

    Through the High Penetration Solar Deployment program, DOE is funding solar projects that are accelerating the placement of solar photovoltaic (PV) systems into existing and newly ...

  7. High Penetration Solar Deployment Funding Opportunity

    Broader source: Energy.gov [DOE]

    Through the High Penetration Solar Deployment program, DOE is funding solar projects that are accelerating the placement of solar photovoltaic (PV) systems into existing and newly designed...

  8. Stateline Solar Power Plant | Open Energy Information

    Open Energy Info (EERE)

    Name Stateline Solar Power Plant Facility Stateline Sector Solar Facility Type Photovoltaic Developer First Solar Location San Bernardino County, California Coordinates...

  9. Blythe Solar Power Plant | Open Energy Information

    Open Energy Info (EERE)

    search Name Blythe Solar Power Plant Facility Blythe Sector Solar Facility Type Photovoltaic Developer First Solar Location Blythe, California Coordinates 33.6172329,...

  10. Enterprise Solar Solutions | Open Energy Information

    Open Energy Info (EERE)

    Sector: Solar Product: New York-based company that specializes in commercial solar photovoltaic applications for businesses. References: Enterprise Solar Solutions1 This article...

  11. Shanghai Solar Watt Ltd | Open Energy Information

    Open Energy Info (EERE)

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

  12. EFRC Director's call | Solid State Solar Thermal Energy Conversion

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

    Market Impacts EERE Market Impacts Addthis RENEWABLE ELECTRICITY GENERATION SUCCESS STORIES 1 of 3 RENEWABLE ELECTRICITY GENERATION SUCCESS STORIES EERE's investments in geothermal, solar, water, and wind energy translate into more efficient, affordable technologies and encourage more widespread use of clean energy in the United States. ENERGY-SAVING HOMES, BUILDINGS, AND MANUFACTURING SUCCESS STORIES 2 of 3 ENERGY-SAVING HOMES, BUILDINGS, AND MANUFACTURING SUCCESS STORIES EERE's investments in

  13. Power efficiency for very high temperature solar thermal cavity receivers

    DOE Patents [OSTI]

    McDougal, Allan R.; Hale, Robert R.

    1984-01-01

    This invention is an improved solar energy cavity receiver for exposing materials and components to high temperatures. The receiver includes a housing having an internal reflective surface defining a cavity and having an inlet for admitting solar radiation thereto. A photothermal absorber is positioned in the cavity to receive radiation from the inlet. A reflective baffle is positioned between the absorber and the inlet to severely restrict the re-radiation of energy through the inlet. The front surface of the baffle defines a narrow annulus with the internal reflective surface of the housing. The front surface of the baffle is contoured to reflect incoming radiation onto the internal surface of the housing, from which it is reflected through the annulus and onto the front surface of the absorber. The back surface of the baffle intercepts infrared radiation from the front of the absorber. With this arrangement, a high percentage of the solar power input is retained in the cavity; thus, high internal temperatures are attained.

  14. Sunset Reservoir Solar Power Plant | Open Energy Information

    Open Energy Info (EERE)

    Reservoir Solar Power Plant Facility Sunset Reservoir Sector Solar Facility Type Photovoltaic Developer Recurrent Energy Location San Francisco, California Coordinates...

  15. PROJECT PROFILE: Dynamic Building Load Control to Facilitate High Penetration of Solar Photovoltaic Generation (SuNLaMP)

    Broader source: Energy.gov [DOE]

    This project aims to develop, demonstrate, and validate a sensing and control mechanism for using power loads to address variable photovoltaic (PV) generation, which will reduce two-way power flow and mitigate voltage instability on distribution level circuits. The availability of this technology will enable increased penetration of renewables while weakening the challenges that arise due to their intermittency in generation by using flexibility on load side.

  16. EFRC Yellow Team Director's Conference Call | Solid State Solar Thermal

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

    Energy Conversion Yellow Team Director's Conference Call Seminar Thursday Mar 10, 2016 2:00pm Location: 3-258 Event Contact: juliette@mit.edu Our team of EFRC directors will have a conference call to discuss research results. Ognjen Ilic will present for S3TEC on the research on thermal emission light recycling.

  17. S3TEC Annual Workship | Solid State Solar Thermal Energy Conversion

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

    Annual Workship Workshop Saturday Feb 13, 2016 9:00am to 8:00pm Location: MIT Faculty Club Annual Workshop - Solid State Solar Thermal Energy Conversion February 13, 2016 9:00 am-8:00 pm Location: MIT Faculty Club and Conference Center, 50 Memorial Drive, Cambridge, MA

  18. Solar Newsletter

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

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

  19. Compendium of information on identification and testing of materials for plastic solar thermal collectors

    SciTech Connect (OSTI)

    McGinniss, V.D.; Sliemers, F.A.; Landstrom, D.K.; Talbert, S.G.

    1980-07-31

    This report is intended to organize and summarize prior and current literature concerning the weathering, aging, durability, degradation, and testing methodologies as applied to materials for plastic solar thermal collectors. Topics covered include (1) rate of aging of polymeric materials; (2) environmental factors affecting performance; (3) evaluation and prediction of service life; (4) measurement of physical and chemical properties; (5) discussion of evaluation techniques and specific instrumentation; (6) degradation reactions and mechanisms; (7) weathering of specific polymeric materials; and (8) exposure testing methodology. Major emphasis has been placed on defining the current state of the art in plastics degradation and on identifying information that can be utilized in applying appropriate and effective aging tests for use in projecting service life of plastic solar thermal collectors. This information will also be of value where polymeric components are utilized in the construction of conventional solar collectors or any application where plastic degradation and weathering are prime factors in material selection.

  20. Molten Salt-Carbon Nanotube Thermal Energy Storage for Concentrating Solar Power Systems Final Report

    SciTech Connect (OSTI)

    Michael Schuller; Frank Little; Darren Malik; Matt Betts; Qian Shao; Jun Luo; Wan Zhong; Sandhya Shankar; Ashwin Padmanaban

    2012-03-30

    We demonstrated that adding nanoparticles to a molten salt would increase its utility as a thermal energy storage medium for a concentrating solar power system. Specifically, we demonstrated that we could increase the specific heat of nitrate and carbonate salts containing 1% or less of alumina nanoparticles. We fabricated the composite materials using both evaporative and air drying methods. We tested several thermophysical properties of the composite materials, including the specific heat, thermal conductivity, latent heat, and melting point. We also assessed the stability of the composite material with repeated thermal cycling and the effects of adding the nanoparticles on the corrosion of stainless steel by the composite salt. Our results indicate that stable, repeatable 25-50% improvements in specific heat are possible for these materials. We found that using these composite salts as the thermal energy storage material for a concentrating solar thermal power system can reduce the levelized cost of electricity by 10-20%. We conclude that these materials are worth further development and inclusion in future concentrating solar power systems.

  1. Solar Thermal Collectors - Energy Explained, Your Guide To Understanding

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

    Energy - Energy Information Administration Collectors Energy Explained - Home What Is Energy? Forms of Energy Sources of Energy Laws of Energy Units and Calculators Energy Conversion Calculators British Thermal Units (Btu) Degree-Days U.S. Energy Facts State and U.S. Territory Data Use of Energy In Industry For Transportation In Homes In Commercial Buildings Efficiency and Conservation Energy and the Environment Greenhouse Gases Effect on the Climate Where Greenhouse Gases Come From Outlook

  2. Solar Thermal Power Plants - Energy Explained, Your Guide To Understanding

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

    Energy - Energy Information Administration Power Plants Energy Explained - Home What Is Energy? Forms of Energy Sources of Energy Laws of Energy Units and Calculators Energy Conversion Calculators British Thermal Units (Btu) Degree-Days U.S. Energy Facts State and U.S. Territory Data Use of Energy In Industry For Transportation In Homes In Commercial Buildings Efficiency and Conservation Energy and the Environment Greenhouse Gases Effect on the Climate Where Greenhouse Gases Come From

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

    SciTech Connect (OSTI)

    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.

  4. NREL Center for Photovoltaics

    ScienceCinema (OSTI)

    None

    2013-05-29

    Solar cells, also called photovoltaics (PV) by solar cell scientists, convert sunlight directly into electricity. Solar cells are often used to power calculators and watches. The performance of a solar cell is measured in terms of its efficiency at turning sunlight into electricity. Only sunlight of certain energies will work efficiently to create electricity, and much of it is reflected or absorbed by the material that make up the cell. Because of this, a typical commercial solar cell has an efficiency of 15%?about one-sixth of the sunlight striking the cell generates electricity. Low efficiencies mean that larger arrays are needed, and that means higher cost. Improving solar cell efficiencies while holding down the cost per cell is an important goal of the PV industry, researchers at the National Renewable Energy Laboratory (NREL) and other U.S. Department of Energy (DOE) laboratories, and they have made significant progress. The first solar cells, built in the 1950s, had efficiencies of less than 4%. For a text version of this video visit http://www.nrel.gov/learning/re_photovoltaics_video_text.html

  5. NREL Center for Photovoltaics

    SciTech Connect (OSTI)

    2009-01-01

    Solar cells, also called photovoltaics (PV) by solar cell scientists, convert sunlight directly into electricity. Solar cells are often used to power calculators and watches. The performance of a solar cell is measured in terms of its efficiency at turning sunlight into electricity. Only sunlight of certain energies will work efficiently to create electricity, and much of it is reflected or absorbed by the material that make up the cell. Because of this, a typical commercial solar cell has an efficiency of 15%about one-sixth of the sunlight striking the cell generates electricity. Low efficiencies mean that larger arrays are needed, and that means higher cost. Improving solar cell efficiencies while holding down the cost per cell is an important goal of the PV industry, researchers at the National Renewable Energy Laboratory (NREL) and other U.S. Department of Energy (DOE) laboratories, and they have made significant progress. The first solar cells, built in the 1950s, had efficiencies of less than 4%. For a text version of this video visit http://www.nrel.gov/learning/re_photovoltaics_video_text.html

  6. Photovoltaic Subcontract Program

    SciTech Connect (OSTI)

    Surek, Thomas; Catalano, Anthony

    1993-03-01

    This report summarizes the fiscal year (FY) 1992 progress of the subcontracted photovoltaic (PV) research and development (R D) performed under the Photovoltaic Advanced Research and Development Project at the National Renewable Energy Laboratory (NREL)-formerly the Solar Energy Research Institute (SERI). The mission of the national PV program is to develop PV technology for large-scale generation of economically competitive electric power in the United States. The technical sections of the report cover the main areas of the subcontract program: the Crystalline Materials and Advanced Concepts project, the Polycrystalline Thin Films project, Amorphous Silicon Research project, the Photovoltaic Manufacturing Technology (PVMaT) project, PV Module and System Performance and Engineering project, and the PV Analysis and Applications Development project. Technical summaries of each of the subcontracted programs provide a discussion of approaches, major accomplishments in FY 1992, and future research directions.

  7. Solar Radiation Research Laboratory (Poster)

    SciTech Connect (OSTI)

    Stoffel, T.; Andreas, A.; Reda, I.; Dooraghi, M.; Habte, A.; Kutchenreiter, M.; Wilcox, S.

    2012-07-01

    SunShot Initiative awardee posters describing the different technologies within the four subprograms of the DOE Solar Program (Photovoltaics, Concentrating Solar Power, Soft Costs, and Systems Integration).

  8. Trina Solar | Open Energy Information

    Open Energy Info (EERE)

    Limited Name: Trina Solar Limited Place: Changzhou, China Sector: Solar Product: Photovoltaics Number of Employees: 5001-10,000 Year Founded: 1997 Website: www.trinasolar.com ...

  9. Broward County Online Solar Permitting

    Broader source: Energy.gov [DOE]

    Broward County now offers Go SOLAR Online Permitting*, for rooftop solar photovoltaic system permitting. This online permitting system may be used for residential or low commercial properties that...

  10. EWEB- Solar Electric Program (Rebate)

    Broader source: Energy.gov [DOE]

    The Eugene Water & Electric Board's (EWEB) Solar Electric Program offers financial incentives for residential, nonprofit, and government customers that generate electricity solar photovoltaic...

  11. Plovdiv Solar | Open Energy Information

    Open Energy Info (EERE)

    The project developer Plovdiv Solar Ltd. and Sinosol Group will jointly realize photovoltaic power plants on a 330 ha project site near Lyubimets. References: Plovdiv Solar1...

  12. Foundational Solar Resource Research (Poster)

    SciTech Connect (OSTI)

    Orwig, K.; Wilcox, S.; Sengupta, M.; Habte, A.; Anderberg, M.; Stoffel, T.

    2012-07-01

    SunShot Initiative awardee posters describing the different technologies within the four subprograms of the DOE Solar Program (Photovoltaics, Concentrating Solar Power, Soft Costs, and Systems Integration).

  13. Midtemperature solar systems test facility predictions for thermal performance based on test data. Polisolar Model POL solar collector with glass reflector surface

    SciTech Connect (OSTI)

    Harrison, T.D.

    1981-05-01

    Thermal performance predictions based on test data are presented for the Polisolar Model POL solar collector, with glass reflector surfaces, for three output temperatures at five cities in the United States.

  14. Midtemperature solar systems test facility predictions for thermal performance based on test data. Toltec two-axis tracking solar collector with 3M acrylic polyester film reflector surface

    SciTech Connect (OSTI)

    Harrison, T.D.

    1981-06-01

    Thermal performance predictions based on test data are presented for the Toltec solar collector, with acrylic film reflector surface, for three output temperatures at five cities in the United States.

  15. Feasibility Study of Economics and Performance of Solar Photovoltaics at the Santo Domingo Pueblo in Sandoval County, New Mexico

    SciTech Connect (OSTI)

    Geiger, J.; Lisell, L.; Mosey, G.

    2013-07-01

    The U.S. Environmental Protection Agency (EPA), in accordance with the RE-Powering America's Land initiative, selected the Pueblo of Santo Domingo in Sandoval County, New Mexico, for a renewable energy production feasibility study. The National Renewable Energy Laboratory (NREL) provided technical assistance for this project. The purpose of this report is to assess specific areas on the Pueblo for potential installation of photovoltaic (PV) systems and to estimate the cost, performance, and site impacts of different PV options. The report also recommends financing options that could assist in the implementation of these PV systems.

  16. Residential photovoltaics

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    The photovoltaics overview section of the Renewable Energy Technology Characterizations describes the technical and economic status of this emerging renewable energy option for electricity supply.

  17. Enhancement of current collection in epitaxial lift-off InAs/GaAs quantum dot thin film solar cell and concentrated photovoltaic study

    SciTech Connect (OSTI)

    Sogabe, Tomah Shoji, Yasushi; Tamayo, Efrain; Okada, Yoshitaka; Mulder, Peter; Schermer, John

    2014-09-15

    We report the fabrication of a thin film InAs/GaAs quantum dot solar cell (QD cell) by applying epitaxial lift-off (ELO) approach to the GaAs substrate. We confirmed significant current collection enhancement (?0.91?mA/cm{sup 2}) in the ELO-InAs QD cell within the wavelength range of 700?nm900?nm when compared to the ELO-GaAs control cell. This is almost six times of the sub-GaAs bandgap current collection (?0.16?mA/cm{sup 2}) from the wavelength range of 900?nm and beyond, we also confirmed the ELO induced resonance cavity effect was able to increase the solar cell efficiency by increasing both the short circuit current and open voltage. The electric field intensity of the resonance cavity formed in the ELO film between the Au back reflector and the GaAs front contact layer was analyzed in detail by finite-differential time-domain (FDTD) simulation. We found that the calculated current collection enhancement within the wavelength range of 700?nm900?nm was strongly influenced by the size and shape of InAs QD. In addition, we performed concentrated light photovoltaic study and analyzed the effect of intermediate states on the open voltage under varied concentrated light intensity for the ELO-InAs QD cell.

  18. Midtemperature solar systems test facility predictions for thermal performance based on test data: AAI solar collector with pressure-formed glass reflector surface

    SciTech Connect (OSTI)

    Harrison, T.D.

    1981-03-01

    Sandia National Laboratories, Albuquerque (SNLA), is currently conducting a program to predict the performance and measure the characteristics of commercially available solar collectors that have the potential for use in industrial process heat and enhance oil recovery applications. The thermal performance predictions for the AAI solar line-focusing slat-type collector for five cities in the US are presented. (WHK)

  19. Thermal performance simulation of a solar cavity receiver under windy conditions

    SciTech Connect (OSTI)

    Fang, J.B.; Wei, J.J.; Dong, X.W.; Wang, Y.S.

    2011-01-15

    Solar cavity receiver plays a dominant role in the light-heat conversion. Its performance can directly affect the efficiency of the whole power generation system. A combined calculation method for evaluating the thermal performance of the solar cavity receiver is raised in this paper. This method couples the Monte-Carlo method, the correlations of the flow boiling heat transfer, and the calculation of air flow field. And this method can ultimately figure out the surface heat flux inside the cavity, the wall temperature of the boiling tubes, and the heat loss of the solar receiver with an iterative solution. With this method, the thermal performance of a solar cavity receiver, a saturated steam receiver, is simulated under different wind environments. The highest wall temperature of the boiling tubes is about 150 C higher than the water saturation temperature. And it appears in the upper middle parts of the absorbing panels. Changing the wind angle or velocity can obviously affect the air velocity inside the receiver. The air velocity reaches the maximum value when the wind comes from the side of the receiver (flow angle {alpha} = 90 ). The heat loss of the solar cavity receiver also reaches a maximum for the side-on wind. (author)

  20. Solid State Photovoltaic Research Branch

    SciTech Connect (OSTI)

    Not Available

    1990-09-01

    This report summarizes the progress of the Solid State Photovoltaic Research Branch of the Solar Energy Research Institute (SERI) from October 1, 1988, through September 30,l 1989. Six technical sections of the report cover these main areas of SERIs in-house research: Semiconductor Crystal Growth, Amorphous Silicon Research, Polycrystalline Thin Films, III-V High-Efficiency Photovoltaic Cells, Solid-State Theory, and Laser Raman and Luminescence Spectroscopy. Sections have been indexed separately for inclusion on the data base.