National Library of Energy BETA

Sample records for active solar systems

  1. Active solar heating systems installation manual

    SciTech Connect

    Not Available

    1991-01-01

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

  2. Buildings Energy Data Book: 5.8 Active Solar Systems

    Buildings Energy Data Book

    4 Thermal Solar Collector Manufacturer Statistics - Number of Manufacturers in 2008: 88 - Companies with 90% of their revenue coming from solar collector sales: 56 - Percentage of shipped solar collectors produced by top 5 manufacturers: 79% Source(s): EIA, Solar Thermal Collector Manufacturing Activities 2009, Dec. 2010, p. 2, Table 2.17, p. 24, Table 2.20, p. 27.

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

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

    Name State Administrator North Carolina Solar Center State North Carolina Program Type Property Tax Incentive Rebate Amount No more than conventional equipment Summary Active...

  4. Buildings Energy Data Book: 5.8 Active Solar Systems

    Buildings Energy Data Book

    3 2009 Top Five Destinations of Thermal Solar Collector Shipments Percent of Domestic State U.S. Shipments Thousand SF Florida 27% California 26% Arizona 5% Hawaii 4% Oregon 3% Note(s): Source(s): EIA, Solar Thermal Collector Manufacturing Activities 2009, Dec. 2010, Table 2.4, p. 10. 3771 3537 745 520 387

  5. Solar Thermal Systems: Solar Heating R&D

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

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

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

    SciTech Connect

    Not Available

    1991-01-01

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

  7. Buildings Energy Data Book: 5.8 Active Solar Systems

    Buildings Energy Data Book

    7 2009 Top 10 Destinations of U.S. Photovoltaic Cell and Module Export Shipments, by Country Peak Percent of Country U.S. Exports Germany Italy France Canada Belgium Spain China India South Korea Australia Total U.S. Exports Note(s): Source(s): 8,368 1% 681,427 100% Total U.S. exports of photovoltaic cells and modules increased by 47% from 2008 to 2009. EIA, Solar Photovoltaic Cell/Module Manufacturing Activities, Dec. 2010, Table 3.14. 18,297 3% 14,806 2% 12,581 2% 43,458 6% 27,247 4% 23,460 3%

  8. Buildings Energy Data Book: 5.8 Active Solar Systems

    Buildings Energy Data Book

    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

  9. Active Solar Heating | Department of Energy

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

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

  10. Buildings Energy Data Book: 5.8 Active Solar Systems

    Buildings Energy Data Book

    2 Thermal Solar Collector Shipments, by End Use (Thousand SF) (1) Type 2000 2005 2006 2007 2008 2009 Pool Heating 7863 8934 Hot Water 367 640 1136 1393 1978 1992 Space Heating 99 228 330 189 186 150 Space Cooling 0 2 3 13 18 10 Combined Space/Water Heating 2 16 66 73 148 137 Process Heating 20 0 0 27 50 608 Electricity Generation 3 114 (2) 3847 6 361 389 Total 8354 Note(s): Source(s): 13798 1) Total shipments include imports and exports for all years.For 2007 to 2009, end-use values only include

  11. Active Solar Heating | Department of Energy

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

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

  12. Solar system fault detection

    DOEpatents

    Farrington, Robert B.; Pruett, Jr., James C.

    1986-01-01

    A fault detecting apparatus and method are provided for use with an active solar system. The apparatus provides an indication as to whether one or more predetermined faults have occurred in the solar system. The apparatus includes a plurality of sensors, each sensor being used in determining whether a predetermined condition is present. The outputs of the sensors are combined in a pre-established manner in accordance with the kind of predetermined faults to be detected. Indicators communicate with the outputs generated by combining the sensor outputs to give the user of the solar system and the apparatus an indication as to whether a predetermined fault has occurred. Upon detection and indication of any predetermined fault, the user can take appropriate corrective action so that the overall reliability and efficiency of the active solar system are increased.

  13. Solar system fault detection

    DOEpatents

    Farrington, R.B.; Pruett, J.C. Jr.

    1984-05-14

    A fault detecting apparatus and method are provided for use with an active solar system. The apparatus provides an indication as to whether one or more predetermined faults have occurred in the solar system. The apparatus includes a plurality of sensors, each sensor being used in determining whether a predetermined condition is present. The outputs of the sensors are combined in a pre-established manner in accordance with the kind of predetermined faults to be detected. Indicators communicate with the outputs generated by combining the sensor outputs to give the user of the solar system and the apparatus an indication as to whether a predetermined fault has occurred. Upon detection and indication of any predetermined fault, the user can take appropriate corrective action so that the overall reliability and efficiency of the active solar system are increased.

  14. Activ Solar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Activ Solar Jump to: navigation, search Name: Activ Solar Address: Vienna, Wipplingerstrasse 35 Place: Austria Zip: 1010 Sector: Solar Product: The company's main business areas...

  15. Solar Systems | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Logo: Solar Systems Name: Solar Systems Address: 45 Grosvenor Street Place: Abbotsford, Australia Sector: Solar Product: Solar concentrators Phone Number: +61 3 9413 8000 Website:...

  16. United Solar Systems Corp USSC aka Bekaert ECD Solar Systems...

    OpenEI (Open Energy Information) [EERE & EIA]

    Systems Corp USSC aka Bekaert ECD Solar Systems LLC Jump to: navigation, search Name: United Solar Systems Corp (USSC) (aka Bekaert ECD Solar Systems LLC) Place: Middletown...

  17. Active Solar Heating | Department of Energy

    Energy Saver

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

  18. Solar reflector system

    SciTech Connect

    Melamed, A.M.

    1986-07-01

    A solar reflector system is described for reflecting solar energy to an elongated solar receiving area disposed generally in an east-west direction and for helping to optimize the performance versus cost ratios of concentrating solar collector systems utilizing the solar reflector system. The solar reflector system consists of an elongated side reflector panel means to be hinged relative to the solar receiving area, hinge means adjacent the solar receiving area for pivotally connecting the reflector panel means relative to the solar receiving area. The reflector panel means include a reflector surface comprised of a plurality of flat planar reflector panels that are each elongated parallel to the solar receiving area for about the length of the solar receiving area, with adjacent flat planar reflector panels comprising the reflector surface sharing a common edge that extends parallel to the solar receiving area and forming an angle appropriate to facilitate efficient performance of the overall reflector panel means in reflecting solar energy to the solar receiving area, means for adjusting one, some, or all of the angles formed by adjacent flat planar reflector panels comprising the reflector surface. The curvature of the overall reflector surface may be altered on a seasonal basis, and means for adjusting the entire reflector panel means relative to the solar receiving area about the hinge means, so as to improve year-round reflector panel means performance in reflecting solar energy to the solar receiving area.

  19. Solar tracking system

    DOEpatents

    Okandan, Murat; Nielson, Gregory N.

    2016-07-12

    Solar tracking systems, as well as methods of using such solar tracking systems, are disclosed. More particularly, embodiments of the solar tracking systems include lateral supports horizontally positioned between uprights to support photovoltaic modules. The lateral supports may be raised and lowered along the uprights or translated to cause the photovoltaic modules to track the moving sun.

  20. Solar Energy Technologies Program: Systems Integration

    SciTech Connect

    2009-10-26

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

  1. Method for including operation and maintenance costs in the economic analysis of active solar energy systems

    SciTech Connect

    Short, W.D.

    1986-08-01

    For a developing technology such as solar energy, the costs for operation and maintenance (O and M) can be substantial. In the past, most economic analyses included these costs by simply assuming that an annual cost will be incurred that is proportional to the initial cost of the system. However, in assessing the economics of new systems proposed for further research and development, such a simplification can obscure the issues. For example, when the typical method for including O and M costs in an economic analysis is used, the O and M costs associated with a newly developed, more reliable, and slightly more expensive controller will be assumed to increase - an obvious inconsistency. The method presented in this report replaces this simplistic approach with a representation of the O and M costs that explicitly accounts for the uncertainties and risks inherent in the operation of any equipment. A detailed description of the data inputs required by the method is included as well as a summary of data sources and an example of the method as applied to an active solar heating system.

  2. Solar ADEPT: Efficient Solar Energy Systems

    SciTech Connect

    2011-01-01

    Solar ADEPT Project: The 7 projects that make up ARPA-E's Solar ADEPT program, short for 'Solar Agile Delivery of Electrical Power Technology,' aim to improve the performance of photovoltaic (PV) solar energy systems, which convert the sun's rays into electricity. Solar ADEPT projects are integrating advanced electrical components into PV systems to make the process of converting solar energy to electricity more efficient.

  3. Sustainable Buildings. Using Active Solar Power

    SciTech Connect

    Sharp, M. Keith; Barnett, Russell

    2015-04-20

    The objective of this project is to promote awareness and knowledge of active solar energy technologies by installing and monitoring the following demonstration systems in Kentucky: 1) Pool heating system, Churchill Park School, 2) Water heating and daylighting systems, Middletown and Aiken Road Elementary Schools, 3) Photovoltaic street light comparison, Louisville Metro, 4) up to 25 domestic water heating systems across Kentucky. These tasks will be supported by outreach activities, including a solar energy installer training workshop and a Kentucky Solar Energy Conference.

  4. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    5 Shipments of complete solar thermal collector systems, 2008 and 2009 Shipment ... Administration, Form EIA-63A, "Annual Solar Thermal Collector Manufacturers Survey."

  5. Active Solar Heating Basics | Department of Energy

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

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

  6. Innovative Systems Engineering Solar LLC ISE Solar LLC | Open...

    OpenEI (Open Energy Information) [EERE & EIA]

    Systems Engineering Solar LLC ISE Solar LLC Jump to: navigation, search Name: Innovative Systems Engineering Solar LLC (ISE Solar LLC) Place: Warminster, Pennsylvania Zip:...

  7. Siemens Concentrated Solar Power Ltd previously Solel Solar Systems...

    OpenEI (Open Energy Information) [EERE & EIA]

    Siemens Concentrated Solar Power Ltd previously Solel Solar Systems Jump to: navigation, search Name: Siemens Concentrated Solar Power Ltd (previously Solel Solar Systems) Place:...

  8. Shanghai Comtec Solar Technology Ltd aka Comtec Solar System...

    OpenEI (Open Energy Information) [EERE & EIA]

    Comtec Solar Technology Ltd aka Comtec Solar System Group Ltd Jump to: navigation, search Name: Shanghai Comtec Solar Technology Ltd (aka Comtec Solar System Group Ltd) Place:...

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

    SciTech Connect

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

    1981-01-01

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

  10. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    9 Companies involved in solar thermal collector related activities by type, 2008 and 2009 ... 26 32 Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal

  11. Solar energy collecting system

    SciTech Connect

    Taylor, L.H.

    1986-01-14

    This patent describes a solar energy collecting system employing a number of specially positioned collector panels for a south facing wall and roof of a building. The first and second solar panels are placed on the wall and roof. The first and second solar panels are connected to each other for fluid flow. The solar panels are described as being mounted in a position with a specified orientation and angular correlation in order to maximize effective winter sunlight. The patent also describes the panel configuration as being such that the second panel shades the first panel at high summer angles of the sun.

  12. Solar energy collector system

    SciTech Connect

    Natter, H.

    1981-12-29

    A solar energy collector system is described having an array of solar concentrators mounted at spaced intervals along a conduit network through which a heat transfer fluid is circulated. The concentrators include an arcuate channel providing a heat absorption surface and a saddle member for mounting the channel section to the conduit. An insulation shroud surrounds the channel member and conduit. An elongate lens panel is positionable over the absorption surface for focusing incident solar radiation. The angle of inclination of the lens panel can be varied by manual rotation of the solar concentrators about the longitudinal axis of the conduit.

  13. Vaillant Solar Systems | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

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

  14. Expert Solar Systems | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Solar Systems Jump to: navigation, search Logo: Expert Solar Systems Name: Expert Solar Systems Address: 11700 E. Sneller Vista Place: Tucson, Arizona Zip: 85749 Sector: Solar...

  15. Solar Energy System Exemption

    Energy.gov [DOE]

    A solar energy system is defined as "any device that uses the heat of the sun as its primary energy source and is used to heat or cool the interior of a structure or swimming pool, or to heat...

  16. Solar Systems and Solutions Soluciones Sistemas Solares 3S |...

    OpenEI (Open Energy Information) [EERE & EIA]

    Systems and Solutions Soluciones Sistemas Solares 3S Jump to: navigation, search Name: Solar Systems and Solutions Soluciones Sistemas Solares (3S) Place: Navarre, Spain Sector:...

  17. Gap between active and passive solar heating

    SciTech Connect

    Balcomb, J.D.

    1985-01-01

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

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

    SciTech Connect

    None,

    1981-09-01

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

  19. Solar energy collection system

    SciTech Connect

    Hummel, R.L.

    1982-04-06

    A solar energy collection system for a building is described. A solar energy collector is disposed at the exterior surface of the building and includes a solar energy absorbent body having a surface which is exposed to sunlight and from which solar energy can be transmitted as sensible heat. A panel which is transparent to sunlight is spaced from the said surface of the absorbent body so as to define therewith a passageway in which air contacts at least a substantial area of said surface so that air in said passageway absorbs heat transmitted from said surface when the collector is in use. The passageway has an inlet and an outlet and the absorbent body and panel are arranged with the outlet higher than the inlet so that heated air in the passageway tends to rise by convection towards the outlet. The building is provided with heating means including a circulation circuit for a heating fluid. Heat exchange means are coupled to said air passageway outlet of the solar energy collector for passage of heated air therethrough. The heat exchange means are also coupled to the circulation circuit of the building heating means and are arranged to permit heat transfer between said heated air and the heating fluid. A return air flow conduit is coupled between the heat exchange means and the inlet of the air passageway of the solar energy collector for returning heated air from the heat exchange means to the air passageway for recirculation.

  20. Mirasol Solar Energy Systems | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Mirasol Solar Energy Systems Jump to: navigation, search Logo: Mirasol Solar Energy Systems Name: Mirasol Solar Energy Systems Address: 101 Spring Road NE Place: Rio Rancho, New...

  1. Small Solar Electric Systems | Department of Energy

    Energy Saver

    Electricity & Fuel Buying & Making Electricity Small Solar Electric Systems Small Solar Electric Systems A small solar electric or photovoltaic system can be a reliable and ...

  2. Special Assessment for Solar Energy Systems

    Energy.gov [DOE]

    Eligible equipment includes both active and passive solar energy systems. The exemption is not valid for equipment that is equally usable in a conventional energy system or for components that...

  3. Systems Integration: Solar Energy Technologies Program (SETP) (Fact Sheet)

    SciTech Connect

    Not Available

    2009-10-01

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

  4. Solimpeks Solar Energy Systems | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Solimpeks Solar Energy Systems Jump to: navigation, search Name: Solimpeks Solar Energy Systems Place: Karatay - KONYA, Turkey Zip: 42300 Sector: Solar Product: Turkish...

  5. Rand Solar Energy Systems | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Rand Solar Energy Systems Jump to: navigation, search Name: Rand Solar Energy Systems Place: Petach Tikva, Israel Zip: 49130 Sector: Solar Product: Israel-based manufacturer and...

  6. Solar Two Tower System

    Energy.gov [DOE]

    In this photograph of a concentrating solar power (CSP) technology, stretched membrane heliostats with silvered polymer reflectors will be used as demonstration units at the Solar Two central...

  7. Solar Thermal Collector Manufacturing Activities - Energy Information...

    Annual Energy Outlook

    Solar Thermal Manufacturing Activities Release Date: December 2010 | Next Release Date: ... Year: (PDF) 2009 2008 2007 2006 2005 2004 2003 1993 Go Overview Total shipments26 of solar ...

  8. Solar thermal power system

    SciTech Connect

    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.

  9. Solar heating system

    DOEpatents

    Schreyer, James M.; Dorsey, George F.

    1982-01-01

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

  10. Improved solar heating systems

    DOEpatents

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

    1980-05-16

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

  11. Integrated Solar Thermochemical Reaction System

    Office of Energy Efficiency and Renewable Energy (EERE)

    This fact sheet describes an integrated solar thermochemical reaction system project awarded under the DOE's 2012 SunShot Concentrating Solar Power R&D award program. The team, led by the Pacific Northwest National Laboratory, is working to develop and demonstrate a high-performance solar thermochemical reaction system in an end-to-end demonstration that produces electricity. A highly efficient solar thermochemical reaction system would allow for 24-hour operation without the need for storage technology, and reductions in total system costs while providing a relatively low-risk deployment option for CSP systems.

  12. Solstice Solar Systems LLC | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    California Zip: 95008-6906 Sector: Solar Product: US-based manufacturer of PV inverters and wires to connect solar panels. References: Solstice Solar Systems LLC1 This...

  13. Environmental Solar Systems | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Environmental Solar Systems Address: 117 West Street Place: Methuen, Massachusetts Zip: 01844 Region: Greater Boston Area Sector: Solar Product: Solar thermal panels for home...

  14. Material and Chemical Processing (Concentrated Solar) (4 Activities) |

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

    Department of Energy Material and Chemical Processing (Concentrated Solar) (4 Activities) Material and Chemical Processing (Concentrated Solar) (4 Activities) Below is information about the student activity/lesson plan from your search. Grades 5-8 Subject Solar Summary Concentrated sunlight is a versatile and high-quality form of energy with several potential applications besides producing heat and electricity. Today, scientists are developing systems that use concentrated sunlight to

  15. Solar activities at Sandia National Laboratories

    SciTech Connect

    Klimas, P.C.; Hasti, D.E.

    1994-03-01

    The use of renewable energy technologies is typically thought of as an integral part of creating and sustaining an environment that maximizes the overall quality of life of the Earth`s present inhabitants and does not leave an undue burden on future generations. Sandia National Laboratories has been a leader in developing and deploying many of these technologies over the last two decades. A common but special aspect of all of these activities is that they are all conducted in cooperation with various types of partners. Some of these partners have an interest in seeing these systems grow in the marketplace, while others are primarily concerned with economic benefits that can come from immediate use of these renewable energy systems. This paper describes solar thermal and photovoltaic technology activities at Sandia that are intended to accelerate the commercialization of these solar systems.

  16. Solar Energy Education. Humanities: activities and teacher's...

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

    Humanities: activities and teacher's guide. Field test edition Citation Details In-Document Search Title: Solar Energy Education. Humanities: activities and teacher's guide. Field ...

  17. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    2 Solar thermal collector shipments by type, quantity, revenue, and average price, 2008 ... Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal ...

  18. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    1 Distribution of domestic solar thermal collector shipments (thousand square feet) 2008 ... Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal ...

  19. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    4 Average thermal performance rating of solar thermal collectors by type shipped in 2009 ... Administration, Form EIA-63A, "Annual Solar Thermal Collector Manufacturers Survey." ...

  20. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    Annual shipments of solar thermal collectors by type, 2000 - 2009 (thousand square feet) ... Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal ...

  1. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    Shipments of solar thermal collectors ranked by origin and destination, 2009 Origin Top ... Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal ...

  2. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    Annual shipments of solar thermal collectors by source, 2000 - 2009 Imports Domestically ... Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal ...

  3. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    Annual shipments of solar thermal collectors by disposition, 2000 - 2009 (thousand square ... Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal ...

  4. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    7 Percent of solar thermal collector shipments by the 10 largest companies, 2000 - 2009 ... Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal ...

  5. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    8 Import shipments of solar thermal collectors by country, 2008 and 2009 (square feet) ... Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal ...

  6. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    7 Import shipments of solar thermal collectors by type, 2000 - 2009 (thousand square feet) ... Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal ...

  7. Views of the solar system

    SciTech Connect

    Hamilton, C.

    1995-02-01

    Views of the Solar System has been created as an educational tour of the solar system. It contains images and information about the Sun, planets, moons, asteroids and comets found within the solar system. The image processing for many of the images was done by the author. This tour uses hypertext to allow space travel by simply clicking on a desired planet. This causes information and images about the planet to appear on screen. While on a planet page, hyperlinks travel to pages about the moons and other relevant available resources. Unusual terms are linked to and defined in the Glossary page. Statistical information of the planets and satellites can be browsed through lists sorted by name, radius and distance. History of Space Exploration contains information about rocket history, early astronauts, space missions, spacecraft and detailed chronology tables of space exploration. The Table of Contents page has links to all of the various pages within Views Of the Solar System.

  8. NREL: Concentrating Solar Power Research - Systems Analysis

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

    solar financial models developed and integrated into the System Advisor Model (SAM) software Grid penetration and life-cycle analysis studies The Solar-augment study of...

  9. Solar Systems USA | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    up":"","inlineLabel":"","visitedicon":"" Hide Map References: Solar Systems USA Online Solar Panel Retailer1 This article is a stub. You can help OpenEI by expanding it. Solar...

  10. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    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 ...

  11. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    8 Employment in the solar thermal collector industry, 2000 - 2009 2000 284 2001 256 2002 ... Source: U.S. Energy Information Administration, Form EIA-63A, "Annual Solar Thermal

  12. Solar-powered cooling system

    SciTech Connect

    Farmer, Joseph C

    2013-12-24

    A solar-powered adsorption-desorption refrigeration and air conditioning system uses nanostructural materials made of high specific surface area adsorption aerogel as the adsorptive media. Refrigerant molecules are adsorbed on the high surface area of the nanostructural material. A circulation system circulates refrigerant from the nanostructural material to a cooling unit.

  13. Solar thermophotovoltaic system using nanostructures

    DOE PAGES [OSTI]

    Ungaro, Craig; Gray, Stephen K.; Gupta, Mool C.

    2015-08-20

    This paper presents results on a highly efficient experimental solar thermophotovoltaic (STPV) system using simulated solar energy. An overall power conversion efficiency of 6.2% was recorded under solar simulation. This was matched with a thermodynamic model, and the losses within the system, as well as a path forward to mitigate these losses, have been investigated. The system consists of a planar, tungsten absorbing/emitting structure with an anti-reflection layer coated laser-microtextured absorbing surface and single-layer dielectric coated emitting surface. A GaSb PV cell was used to capture the emitted radiation and convert it into electrical energy. This simple structure is bothmoreeasy to fabricate and temperature stable, and contains no moving parts or heat exchange fluids.less

  14. Solar desalination system and method

    SciTech Connect

    Kruse, C.L.

    1985-03-12

    A solar desalination system in which fresh water is derived from sea water by focussing solar ray energy from a collecting reflector onto an evaporator tube located at substantially the focal apex of the reflector. The reflector/evaporator tube assembly is mounted on a horizontal open grid platform which may support a plurality of parallel reflector/evaporator tube assemblies. The reflectors may serve as pontoons to support the desalination system unit on a body of sea water. The solar heat generated vapor is condensed in condenser tubes immersed in the sea water. Intermittently sea water concentrate is withdrawn from the evaporator tubes. Velocity of the vapor passing from the evaporator tubes to the condensers may be utilized for generating power.

  15. EcoSolar Systems India Ltd | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

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

  16. Small Solar Electric Systems | Department of Energy

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

    Buying & Making Electricity » Small Solar Electric Systems Small Solar Electric Systems A small solar electric or photovoltaic system can be a reliable and pollution-free producer of electricity for your home or office. A small solar electric or photovoltaic (PV) system can be a reliable and pollution-free producer of electricity for your home or office. Small PV systems also provide a cost-effective power supply in locations where it is expensive or impossible to send electricity through

  17. Hybrid Wind and Solar Electric Systems | Department of Energy

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

    Buying & Making Electricity Hybrid Wind and Solar Electric Systems Hybrid Wind and Solar Electric Systems Because the peak operating times for wind and solar systems occur at...

  18. Residential Solar and Wind Energy Systems Tax Credit

    Energy.gov [DOE]

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

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

    Office of Environmental Management (EM)

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

  20. Premier Solar Systems Pvt Ltd | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

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

  1. Searching for the Solar System's Chemical Recipe

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

    Searching for the Solar System's Chemical Recipe Searching for the Solar System's Chemical Recipe Print Wednesday, 20 February 2013 00:00 The ratio of isotopes in elements like ...

  2. Studying the Solar System's Chemical Recipe

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

    Studying the Solar System's Chemical Recipe Studying the Solar System's Chemical Recipe Print Tuesday, 26 March 2013 00:00 To study the origins of different isotope ratios among ...

  3. Solar Thermal Collector Manufacturing Activities

    Annual Energy Outlook

    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 ...

  4. Adaptive, full-spectrum solar energy system

    DOEpatents

    Muhs, Jeffrey D.; Earl, Dennis D.

    2003-08-05

    An adaptive full spectrum solar energy system having at least one hybrid solar concentrator, at least one hybrid luminaire, at least one hybrid photobioreactor, and a light distribution system operably connected to each hybrid solar concentrator, each hybrid luminaire, and each hybrid photobioreactor. A lighting control system operates each component.

  5. Solar Energy Educational Material, Activities and Science Projects

    Office of Scientific and Technical Information (OSTI)

    DOE Documents with ActivitiesProjects: Web Pages Solar Energy Education. Renewable Energy Activities for Junior HighMiddle School Science Solar Energy Education. Renewable Energy ...

  6. Solar power system

    SciTech Connect

    Mcgrew, S.P.

    1980-05-27

    A system for generating electrical power from sunlight, comprises a focussing diffraction grating or other focussing, spectrally dispersive means and a photocell array. The diffraction grating focuses sunlight into a spectrally dispersed band. The photocell array is composed of cells with different spectral sensitivities, located in positions in the dispersed band corresponding to the cell spectral sensitivities so that the net conversion efficiency of sunlight to electricity exceeds the conversion efficiency attainable with nondispersive collectors and single material photocells. Alternate embodiments of the invention provide sun tracking means, reflective or transmissive diffraction gratings, flat or curved diffraction grating surfaces , on- or off-axis focus, and optical coatings on the photocell surfaces.

  7. Solar-powered cooling system

    SciTech Connect

    Farmer, Joseph C.

    2015-07-28

    A solar-powered adsorption-desorption refrigeration and air conditioning system that uses nanostructural materials such as aerogels, zeolites, and sol gels as the adsorptive media. Refrigerant molecules are adsorbed on the high surface area of the nanostructural material while the material is at a relatively low temperature, perhaps at night. During daylight hours, when the nanostructural materials is heated by the sun, the refrigerant are thermally desorbed from the surface of the aerogel, thereby creating a pressurized gas phase in the vessel that contains the aerogel. This solar-driven pressurization forces the heated gaseous refrigerant through a condenser, followed by an expansion valve. In the condenser, heat is removed from the refrigerant, first by circulating air or water. Eventually, the cooled gaseous refrigerant expands isenthalpically through a throttle valve into an evaporator, in a fashion similar to that in more conventional vapor recompression systems.

  8. Sandia Energy - Solar Energy Grid Integration Systems (SEGIS...

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

    Solar Energy Grid Integration Systems (SEGIS) Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Grid Integration Solar Energy Grid Integration Systems...

  9. Gadhia Solar Energy Systems Pvt Ltd GSESPL | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Gadhia Solar Energy Systems Pvt Ltd GSESPL Jump to: navigation, search Name: Gadhia Solar Energy Systems Pvt Ltd. (GSESPL) Place: Valsad, Gujarat, India Zip: 396035 Sector: Solar...

  10. Fraunhofer Institute for Solar Energy Systems ISE | Open Energy...

    OpenEI (Open Energy Information) [EERE & EIA]

    Solar Energy Systems ISE Jump to: navigation, search Name: Fraunhofer Institute for Solar Energy Systems (ISE) Place: Freiburg, Germany Zip: 79110 Sector: Solar Product: Leading...

  11. Systems and methods for solar energy storage, transportation, and conversion utilizing photochemically active organometallic isomeric compounds and solid-state catalysts

    DOEpatents

    Vollhardt, K. Peter C.; Segalman, Rachel A; Majumdar, Arunava; Meier, Steven

    2015-02-10

    A system for converting solar energy to chemical energy, and, subsequently, to thermal energy includes a light-harvesting station, a storage station, and a thermal energy release station. The system may include additional stations for converting the released thermal energy to other energy forms, e.g., to electrical energy and mechanical work. At the light-harvesting station, a photochemically active first organometallic compound, e.g., a fulvalenyl diruthenium complex, is exposed to light and is photochemically converted to a second, higher-energy organometallic compound, which is then transported to a storage station. At the storage station, the high-energy organometallic compound is stored for a desired time and/or is transported to a desired location for thermal energy release. At the thermal energy release station, the high-energy organometallic compound is catalytically converted back to the photochemically active organometallic compound by an exothermic process, while the released thermal energy is captured for subsequent use.

  12. Hybrid solar lighting distribution systems and components

    DOEpatents

    Muhs, Jeffrey D.; Earl, Dennis D.; Beshears, David L.; Maxey, Lonnie C.; Jordan, John K.; Lind, Randall F.

    2011-07-05

    A hybrid solar lighting distribution system and components having at least one hybrid solar concentrator, at least one fiber receiver, at least one hybrid luminaire, and a light distribution system operably connected to each hybrid solar concentrator and each hybrid luminaire. A controller operates all components.

  13. Hybrid solar lighting systems and components

    DOEpatents

    Muhs, Jeffrey D.; Earl, Dennis D.; Beshears, David L.; Maxey, Lonnie C.; Jordan, John K.; Lind, Randall F.

    2007-06-12

    A hybrid solar lighting system and components having at least one hybrid solar concentrator, at least one fiber receiver, at least one hybrid luminaire, and a light distribution system operably connected to each hybrid solar concentrator and each hybrid luminaire. A controller operates each component.

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

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

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

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

    Energy Saver

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

  16. Solar energy electric generating system

    SciTech Connect

    Anthony, J.

    1988-03-01

    A solar energy electric generating system is described comprising in combination: (a) an array of photocells; (b) means for gating the electrical direct current energy produced by the array of photocells; (c) means for transforming the electrical direct current energy at an output of the array of photocells whereby an alternating current at the output of the transforming means is produced, and which is controlled by a control device for controlling the rate and duty cycle of the gating means; and (d) a photosensitive sampler which samples light incident upon the photocell array and outputs a proportional signal.

  17. Tracking system for solar collectors

    DOEpatents

    Butler, B.

    1980-10-01

    A tracking system is provided for pivotally mounted spaced-apart solar collectors. A pair of cables is connected to spaced-apart portions of each collector, and a driver displaces the cables, thereby causing the collectors to pivot about their mounting, so as to assume the desired orientation. The collectors may be of the cylindrical type as well as the flat-plate type. Rigid spar-like linkages may be substituted for the cables. Releasable attachments of the cables to the collectors is also described, as is a fine tuning mechanism for precisely aligning each individual collector.

  18. Tracking system for solar collectors

    DOEpatents

    Butler, Barry L.

    1984-01-01

    A tracking system is provided for pivotally mounted spaced-apart solar collectors. A pair of cables is connected to spaced-apart portions of each collector, and a driver displaces the cables, thereby causing the collectors to pivot about their mounting, so as to assume the desired orientation. The collectors may be of the cylindrical type as well as the flat-plate type. Rigid spar-like linkages may be substituted for the cables. Releasable attachments of the cables to the collectors is also described, as is a fine tuning mechanism for precisely aligning each individual collector.

  19. Solar Energy Education. Home economics: student activities. Field...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Solar Energy Education. Home economics: student activities. Field test edition Citation Details In-Document Search Title: Solar Energy Education. Home economics: ...

  20. Solar Energy Education. Renewable energy activities for earth...

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

    Citation Details In-Document Search Title: Solar Energy Education. Renewable energy ... The main emphasis is placed on solar energy. Activities for the student include a study of ...

  1. Central focus solar energy system

    SciTech Connect

    Findell, M.

    1982-02-23

    A central focus solar energy system consists of one or more arrays of mirrors, a receiver for each array, a sun tracker, a sun tracker sun acquisition device and a control unit. Mirrors of the arrays are subjected to two-axis control by electromechanical devices actuated by sun-tracking error signals generated by the sun tracker. Mirrors are thus oriented so as to cause reflections of the direct rays of the sun from all mirrors in an array to converge on a receiver at a common focus. Fixed (Principal) axes of mirror rotation are parallel to the fixed (Principal) axis of rotation of the sun tracker sensor making orientation of the system independent of the earth's spin axis. The system includes a ''vernier'' or fine adjustment control for positioning mirrors that supplements sun tracker controls.

  2. Ra Solar Systems Solutions SL | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Ra Solar Systems & Solutions SL Place: Madrid, Spain Zip: 28033 Sector: Solar Product: Spanish project developer and finance arranger for large-scale solar farms; also acts as...

  3. Solar thermal power systems. Summary report

    SciTech Connect

    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.

  4. MULTIFUNCTIONAL SOLAR ENERGY SYSTEMS RESEARCH PROJECT

    SciTech Connect

    Byard Wood, Lance Seefeldt, Ronald Sims, Bradley Wahlen, and Dan Dye

    2012-06-29

    The solar energy available within the visible portion of the solar spectrum is about 300 W/m2 (43%) and that available in the UV and IR portion is about 400 W/m2 (57%). This provides opportunities for developing integrated energy systems that capture and use specific wavelengths of the solar spectrum for different purposes. For example: biofuels from photosynthetic microbes use only the visible light; solar cells use a narrow band of the solar spectrum that could be either mostly in the visible or in the IR regions of the solar spectrum, depending on the photovoltaic materials, e.g., gallium antimonide (GaSb) cells utilize predominately IR radiation; and finally, solar panels that heat water utilize a broad range of wavelengths (visible plus IR). The basic idea of this research is that sunlight has many possible end-use applications including both direct use and energy conversion schemes; it is technically feasible to develop multifunctional solar energy systems capable of addressing several end-use needs while increasing the overall solar energy utilization efficiency when compared to single-purpose solar technologies. Such a combination of technologies could lead to more cost-competitive ?multifunctional? systems that add value and broaden opportunities for integrated energy systems. The goal of this research is to increase the overall energy efficacy and cost competitiveness of solar systems. The specific objectives of this research were: 1) Evaluate the efficacy of a combined photobioreactor and electric power system; 2) Improve the reliability and cost effectiveness of hybrid solar lighting systems ? a technology in which sunlight is collected and distributed via optical fibers into the interior of a building; 3) Evaluate the efficacy of using filtered light to increase the production of biomass in photobioreactors and provide more solar energy for other uses; 4) Evaluates several concepts for wavelength shifting such that a greater percentage of the solar

  5. Highly Efficient Solar Thermochemical Reaction Systems

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

    Highly Efficient, Solar Thermochemical Reaction Systems (2014 R&D 100 Award Winner) U.S. Department of Energy Fuel Cell Technologies Office 2 Question and Answer * Please type your question into the question box hydrogenandfuelcells.energy.gov HIGHLY EFFICIENT, SOLAR THERMOCHEMICAL REACTION SYSTEMS Robert S Wegeng, PI FCTO Webinar 2014 R&D 100 Award Winning Technology January 13, 2015 HIGHLY EFFICIENT, SOLAR THERMOCHEMICAL REACTION SYSTEMS Robert S Wegeng, PI FCTO Webinar January 13,

  6. Solar Roofing Systems Inc | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Inc Place: Aurora, Ontario, Canada Zip: L4G 3S8 Product: Manufactures and develops photovoltaic roofing and portable products. References: Solar Roofing Systems Inc1 This...

  7. Studying the Solar System's Chemical Recipe

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

    Studying the Solar System's Chemical Recipe Print To study the origins of different isotope ratios among the elements that make up today's smorgasbord of planets, moons, comets,...

  8. Studying the Solar System's Chemical Recipe

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

    has worked to learn how our solar system evolved. Now he and his colleagues Teresa Jackson and Subrata Chakraborty (who won the David A. Shirley Award for Outstanding...

  9. Enolia Solar Systems | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    PV project developer, installer, distributor of products, and operations and maintenance service provider. References: Enolia Solar Systems1 This article is a stub. You...

  10. Solar Energy Systems - Research - Systems Analysis - Smart Grid...

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

    Sunlight Systems Analysis Solar Fuels Research: Systems Analysis Smart grid photovoltaic Systems analysis photovoltaic A team of energy and grid experts from Agronne,...

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

    SciTech Connect

    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.

  12. SolarPower Restoration Systems Inc | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Solar Product: SolarPower Restoration Systems is pursuing Building Integrated Photovoltaics (BIPV) systems and large scale Photovoltaic Power (PV) Array Systems over concrete...

  13. Concentrating Solar Power Tower System Basics | Department of...

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

    Tower System Basics Concentrating Solar Power Tower System Basics August 20, 2013 - 5:06pm Addthis In power tower concentrating solar power systems, numerous large, flat, ...

  14. Integrated solar thermal energy collector system

    SciTech Connect

    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.

  15. Solar Energy System and Cogeneration System Personal Property Tax Credit

    Energy.gov [DOE]

    Eligible solar systems Solar energy is defined by D.C. Code § 34-1431 to mean "radiant energy, direct, diffuse, or reflected, received from the sun at wavelengths suitable for conversion into the...

  16. Concentrating Solar Power Dish Systems

    Energy.gov [DOE]

    In this b-roll, each solar dish in a CSP plant focuses the sun's heat toward a Stirling engine that converts the energy to electricity.

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

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

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

  18. National Solar Systems | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    National Solar Systems Place: Al-Khobar, Saudi Arabia Zip: 31952 Product: Leading system intergrator in Saudi Arabia. Coordinates: 26.28665, 50.21434 Show Map Loading map......

  19. Solar Leasing for Residential Photovoltaic Systems (Revised)...

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

    programs have begun to lower their rebates for small photovoltaic systems (<10 kW). ... Solar Leasing for Residential Photovoltaic Systems 1 Although the high up-front cost of PV ...

  20. Mercury Solar Systems | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    of PV products and systems for commercial and residential clients in the New York metrotri-state area. References: Mercury Solar Systems1 This article is a stub. You can...

  1. Property Tax Exemption for Residential Solar Systems

    Energy.gov [DOE]

    A solar energy system is defined as a system that provides space heat, water heat, or electricity to the property. The term specifically does not include windows, dark-colored water tanks, or non...

  2. Borrego Solar Systems Inc | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Cajon, California Zip: 92020 Product: US-based installer of PV systems for commercial and public projects. References: Borrego Solar Systems Inc1 This article is a stub. You can...

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

    Energy Saver

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

  4. Solar Leasing for Residential Photovoltaic Systems

    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.

  5. Project Profile: Brayton Solar Power Conversion System | Department...

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

    Solar Power Conversion System Project Profile: Brayton Solar Power Conversion System Brayton Energy logo Brayton Energy, under the CSP R&D FOA, is looking to demonstrate the ...

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

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

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

  7. Solco International Ltd formerly Solar Energy Systems | Open...

    OpenEI (Open Energy Information) [EERE & EIA]

    International Ltd formerly Solar Energy Systems Jump to: navigation, search Name: Solco International Ltd (formerly Solar Energy Systems) Place: Welshpool, Western Australia,...

  8. Solar Energy Systems Inc SES | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Systems Inc SES Jump to: navigation, search Name: Solar Energy Systems, Inc (SES) Place: Brooklyn, New York Zip: 11222 Sector: Solar Product: Private company designing, building,...

  9. Systems for Solar Fuels Generation Utilizing PV and Electrolysis...

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

    Systems for Solar Fuels Generation Utilizing PV and Electrolysis Workshop (Newark, Delaware) Systems for Solar Fuels Generation Utilizing PV and Electrolysis Workshop (Newark, ...

  10. Valuation of Solar Photovoltaic Systems Using a Discounted Cash...

    U.S. Department of Energy (DOE) - all 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 ...

  11. Distributed Solar PV for Electricity System Resiliency: Policy...

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

    CONSIDERATIONS ABSTRACT Distributed solar photovoltaic (PV) systems have the ... DESIGNING PV SYSTEMS TO PROVIDE ENERGY RESILIENCY Deploying solar PV technology in ...

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

    Office of Environmental Management (EM)

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

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

    Energy Saver

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

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

    Energy Saver

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

  15. Performance evaluation of an active solar cooling system utilizing low cost plastic collectors and an evaporatively-cooled absorption chiller. Final report

    SciTech Connect

    Lof, G.O.G.; Westhoff, M.A.; Karaki, S.

    1984-02-01

    During the summer of 1982, air conditioning in Solar House III at Colorado State University was provided by an evaporatively-cooled absorption chiller. The single-effect lithium bromide chiller provided by Arkla Industries is an experimental three-ton unit from which heat is rejected by direct evaporative cooling of the condenser and absorber walls, thereby eliminating the need for a separate cooling tower. Domestic hot water was also provided by use of a double-walled heat exchanger and 300-l (80-gal) hot water tank. For solar heat supply to the cooling system, plastic thin film collectors developed by Brookhaven National Laboratory were installed on the roof of Solar House III. Failure to withstand stagnation temperatures forced replacement of solar energy with an electric heat source. Objectives of the project were: (1) evaluation of system performance over the course of one cooling season in Fort collins, Colorado; (2) optimization of system operation and control; (3) development of a TRNSYS compatible model of the chiller; and (4) determination of cooling system performance in several US climates by use of the model.

  16. How are Homeowners and Businesses Paying for Solar Energy Systems...

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

    are Homeowners and Businesses Paying for Solar Energy Systems? How are Homeowners and Businesses Paying for Solar Energy Systems? April 29, 2011 - 11:39am Addthis Solar energy ...

  17. Solar Energy Education. Renewable energy activities for earth science

    SciTech Connect

    Not Available

    1980-01-01

    A teaching manual is provided to aid teachers in introducing renewable energy topics to earth science students. The main emphasis is placed on solar energy. Activities for the student include a study of the greenhouse effect, solar gain for home heating, measuring solar radiation, and the construction of a model solar still to obtain fresh water. Instructions for the construction of apparatus to demonstrate a solar still, the greenhouse effect and measurement of the altitude and azimuth of the sun are included. (BCS)

  18. Studying the Solar System's Chemical Recipe

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

    the Division of Physical Sciences at UCSD, has worked to learn how our solar system evolved. Now he and his colleagues Teresa Jackson and Subrata Chakraborty (who won the David A....

  19. First Rocks from Outside the Solar System

    SciTech Connect

    Westphal, Andrew

    2014-10-17

    Andrew Westphal presents his findings in examining the first rocks from outside the solar system at our '8 Big Ideas' Science at the Theater event on October 8th, 2014, in Oakland, California.

  20. Studying the Solar System's Chemical Recipe

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

    Studying the Solar System's Chemical Recipe Print To study the origins of different ... of California, San Diego is using ALS Chemical Dynamics Beamline 9.0.2 to mimic ...

  1. Solar Energy Systems Tax Credit (Corporate)

    Energy.gov [DOE]

    Note: $1,157,468 in 2015 Solar Energy System Tax Credits had been awarded through May 15, 2015. An additional $1,816,406 of tax credits have been requested on applications received through April 29...

  2. Property Tax Exclusion for Solar Energy Systems

    Energy.gov [DOE]

    Section 73 of the California Revenue and Taxation Code allows a property tax exclusion for certain types of solar energy systems installed between January 1, 1999, and December 31, 2016. This...

  3. Solar Energy Systems Tax Credit (Personal)

    Energy.gov [DOE]

    Note: $1,157,468 in 2015 Solar Energy System Tax Credits had been awarded through May 15, 2015. An additional $1,816,406 of tax credits have been requested on applications received through April 29...

  4. Fourth Fridays Downtown - Exploring the Solar System

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

    Fourth Fridays Downtown - Exploring the Solar System WHEN: May 22, 2015 4:00 PM - 6:00 PM ... CATEGORY: Bradbury INTERNAL: Calendar Login Fourth Fridays Downtown Event Description ...

  5. Webinar: Highly Efficient Solar Thermochemical Reaction Systems

    Energy.gov [DOE]

    The Fuel Cell Technologies Office will present a live webinar titled "Highly Efficient Solar Thermochemical Reaction Systems" on Tuesday, January 13, from 12:00 to 1:00 p.m. Eastern Standard Time.

  6. Highly Efficient Solar Thermochemical Reaction Systems

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

    Highly Efficient, Solar Thermochemical Reaction Systems (2014 R&D 100 Award Winner) U.S. Department of Energy Fuel Cell Technologies Office 2 Question and Answer * Please type your ...

  7. Solar Systems sro | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Republic Zip: 180 00 Product: Czech leading developer for residential and utility PV plants. References: Solar Systems sro1 This article is a stub. You can help OpenEI by...

  8. Solar Energy Education. Social studies: activities and teacher...

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

    Social studies: activities and teacher's guide. Field test edition Citation Details In-Document Search Title: Solar Energy Education. Social studies: activities and teacher's ...

  9. Solar energy education. Renewable energy activities for general...

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

    energy education. Renewable energy activities for general science Citation Details In-Document Search Title: Solar energy education. Renewable energy activities for general science ...

  10. Tehachapi solar thermal system first annual report

    SciTech Connect

    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).

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

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

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

  12. On the possible relations between solar activities and global seismicity in the solar cycle 20 to 23

    SciTech Connect

    Herdiwijaya, Dhani; Arif, Johan; Nurzaman, Muhamad Zamzam; Astuti, Isna Kusuma Dewi

    2015-09-30

    Solar activities consist of high energetic particle streams, electromagnetic radiation, magnetic and orbital gravitational forces. The well-know solar activity main indicator is the existence of sunspot which has mean variation in 11 years, named by solar cycle, allow for the above fluctuations. Solar activities are also related to the space weather affecting all planetary atmospheric variability, moreover to the Earth’s climate variability. Large extreme space and geophysical events (high magnitude earthquakes, explosive volcanic eruptions, magnetic storms, etc.) are hazards for humankind, infrastructure, economies, technology and the activities of civilization. With a growing world population, and with modern reliance on delicate technological systems, human society is becoming increasingly vulnerable to natural hazardous events. The big question arises to the relation between solar forcing energy to the Earth’s global seismic activities. Estimates are needed for the long term occurrence-rate probabilities of these extreme natural hazardous events. We studied connectivity from yearly seismic activities that refer to and sunspot number within the solar cycle 20 to 23 of year 1960 to 2013 (53 years). We found clear evidences that in general high magnitude earthquake events and their depth were related to the low solar activity.

  13. Basics of a Solar Electric System: Better Buildings Series Solar Electric Fact Sheet

    SciTech Connect

    Not Available

    2002-07-01

    Today's solar technologies are more efficient and versatile than ever before, adding to the appeal of an already desirable energy source. This fact sheet provides information on the basics of a solar electric system, including components of a system, how to choose solar modules, and how to choose a solar system.

  14. Photovoltaics: solar electric power systems

    SciTech Connect

    1980-02-01

    The operation and uses of solar cells and the National Photovoltaic Program are briefly described. Eleven DOE photovoltaic application projects are described including forest lookout towers; Wilcox Memorial Hospital in Hawaii; WBNO daytime AM radio station; Schuchuli Indian Village; Meade, Nebraska, agricultural experiment; Mt. Laguna Air Force Station; public schools and colleges; residential applications; and Sea World of Florida. (WHK)

  15. Desalting system utilizing solar energy

    SciTech Connect

    Iida, T.

    1985-06-25

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

  16. Market development directory for solar industrial process heat systems

    SciTech Connect

    1980-02-01

    The purpose of this directory is to provide a basis for market development activities through a location listing of key trade associations, trade periodicals, and key firms for three target groups. Potential industrial users and potential IPH system designers were identified as the prime targets for market development activities. The bulk of the directory is a listing of these two groups. The third group, solar IPH equipment manufacturers, was included to provide an information source for potential industrial users and potential IPH system designers. Trade associates and their publications are listed for selected four-digit Standard Industrial Code (SIC) industries. Since industries requiring relatively lower temperature process heat probably will comprise most of the near-term market for solar IPH systems, the 80 SIC's included in this chapter have process temperature requirements less than 350/sup 0/F. Some key statistics and a location list of the largest plants (according to number of employees) in each state are included for 15 of the 80 SIC's. Architectural/engineering and consulting firms are listed which are known to have solar experience. Professional associated and periodicals to which information on solar IPH sytstems may be directed also are included. Solar equipment manufacturers and their associations are listed. The listing is based on the SERI Solar Energy Information Data Base (SEIDB).

  17. Solar Energy Education. Industrial arts: student activities....

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

    Citation Details In-Document Search Title: Solar Energy Education. Industrial arts: ... to introduce students to information on solar energy through classroom instruction. ...

  18. Advancing State-of-the-Art Concentrating Solar Power Systems

    Energy.gov [DOE]

    New solar receiver for CSP system leads to higher efficiency, increased durability, and reduced cost.

  19. Solar powered CP system protects gathering lines

    SciTech Connect

    Jones, R.L.

    1983-05-01

    The wholly owned gas transmission subsidiary of Public Service Co. of Colorado has installed 2 solar-powered cathodic protection systems in its Ignacio Gathering System. The system is designed for the level of light available in the winter months when the least amount of sunshine is available. The 6 panel system, voltage regulation, automatic load connection/disconnection, and groundbed are described. Solar panel arrays face true south, are tilted at a 52-degree angle, provide 240 watts and a 26.4 amp peak output to charge batteries of the cathodic protection system for 22 miles of 4 to 10-in. gathering lines. Because solar power systems have no moving parts, require no additional fuel other than sunlight, and cause no pollution or noise, they provide years of virtually maintenance-free reliability and performance.

  20. EIS-0416: Ivanpah Solar Electric Generating System in San Bernardino...

    Energy Saver

    Ivanpah Solar Electric Generating System (07-AFC-5) Project, Proposal to Construct a 400-m Megawatt Concentrated Solar Power Tower, Thermal-Electric Power Plant, San Bernardino ...

  1. Concentrating Solar Deployment System (CSDS) -- A New Model for...

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

    Concentrating Solar Deployment System (CSDS) - A New Model for Estimating U.S. Concentrating Solar Power (CSP) Market Potential Preprint N. Blair, M. Mehos, W. Short, and D....

  2. Sandia Solar Energy Test System Cited in National Engineering...

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

    Solar Energy Test System Cited in National Engineering Competition - Sandia Energy Energy ... Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power ...

  3. Cel f Solar Systems Ltd | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Kemsing, Kent, United Kingdom Zip: TN15 6PL Sector: Solar Product: Installer and maintenance service provider for household PV and solar water heating systems. References:...

  4. Homeowners Guide to Leasing a Solar Electric System (Brochure)

    SciTech Connect

    Not Available

    2014-07-01

    This updated fact sheet provides an introduction to solar leases for homeowners who are considering installing a solar electric system on their home.

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

    Energy Saver

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

  6. July 2016 Systems Integration Solar Forecasting:

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

    2016 Systems Integration Solar Forecasting: Maximizing its value for grid integration Introduction The forecasting of power generated by variable energy resources such as wind and solar has been the focus of academic and industrial research and development for as long as significant amounts of these renewable energy resources have been connected to the electric grid. The progress of forecasting capabilities has largely followed the penetration of the respective resources, with wind forecasting

  7. Solar energy system with wind vane

    SciTech Connect

    Grip, Robert E

    2015-11-03

    A solar energy system including a pedestal defining a longitudinal axis, a frame that is supported by the pedestal and that is rotateable relative to the pedestal about the longitudinal axis, the frame including at least one solar device, and a wind vane operatively connected to the frame to urge the frame relative to the pedestal about the longitudinal axis in response to wind acting on the wind vane.

  8. Solar-Electric Dish Stirling System Development

    SciTech Connect

    Mancini, T.R.

    1997-12-31

    Electrical power generated with the heat from the sun, called solar thermal power, is produced with three types of concentrating solar systems - trough or line-focus systems; power towers in which a centrally-located thermal receiver is illuminated with a large field of sun-tracking heliostats; and dish/engine systems. A special case of the third type of system, a dish/Stirling system, is the subject of this paper. A dish/Stirling system comprises a parabolic dish concentrator, a thermal receiver, and a Stirling engine/generator located at the focus of the dish. Several different dish/Stirling systems have been built and operated during the past 15 years. One system claims the world record for net conversion of solar energy to electric power of 29.4%; and two different company`s systems have accumulated thousands of hours of on-sun operation. Due to de-regulation and intense competition in global energy markets as well as the immaturity of the technology, dish/Stirling systems have not yet found their way into the marketplace. This situation is changing as solar technologies become more mature and manufacturers identify high-value niche markets for their products. In this paper, I review the history of dish/Stirling system development with an emphasis on technical and other issues that directly impact the Stirling engine. I also try to provide some insight to the opportunities and barriers confronting the application of dish/Stirling in power generation markets.

  9. Highly Efficient Solar Thermochemical Reaction Systems | Department of

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

    Energy Efficient Solar Thermochemical Reaction Systems Highly Efficient Solar Thermochemical Reaction Systems Download presentation slides from the DOE Fuel Cell Technologies Office webinar "Highly Efficient Solar Thermochemical Reaction Systems" held on January 13, 2015. Highly Efficient Solar Thermochemical Reaction Systems Webinar Slides (6.17 MB) More Documents & Publications Integrated Solar Thermochemical Reaction System for High Efficiency Production of Electricity

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

    Energy.gov [DOE] (indexed site)

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

  11. Power Tower System Concentrating Solar Power Basics | Department...

    Energy.gov [DOE] (indexed site)

    In power tower concentrating solar power systems, a large number of flat, sun-tracking ... Crescent Dunes Solar Energy Project is a 110 megawatt solar thermal power plant located in ...

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

    SciTech Connect

    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)

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

    SciTech Connect

    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.

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

    SciTech Connect

    Harrison, J.

    1997-11-01

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

  15. Solar Energy Education. Renewable energy activities for biology...

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

    biology Citation Details In-Document Search Title: Solar Energy Education. Renewable energy activities for biology You are accessing a document from the Department of Energy's ...

  16. Solar Energy Education. Renewable energy activities for chemistry...

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

    Citation Details In-Document Search Title: Solar Energy Education. Renewable energy activities for chemistry and physics You are accessing a document from the Department of ...

  17. High throughput solar cell ablation system

    DOEpatents

    Harley, Gabriel; Pass, Thomas; Cousins, Peter John; Viatella, John

    2012-09-11

    A solar cell is formed using a solar cell ablation system. The ablation system includes a single laser source and several laser scanners. The laser scanners include a master laser scanner, with the rest of the laser scanners being slaved to the master laser scanner. A laser beam from the laser source is split into several laser beams, with the laser beams being scanned onto corresponding wafers using the laser scanners in accordance with one or more patterns. The laser beams may be scanned on the wafers using the same or different power levels of the laser source.

  18. High throughput solar cell ablation system

    SciTech Connect

    Harley, Gabriel; Pass, Thomas; Cousins, Peter John; Viatella, John

    2014-10-14

    A solar cell is formed using a solar cell ablation system. The ablation system includes a single laser source and several laser scanners. The laser scanners include a master laser scanner, with the rest of the laser scanners being slaved to the master laser scanner. A laser beam from the laser source is split into several laser beams, with the laser beams being scanned onto corresponding wafers using the laser scanners in accordance with one or more patterns. The laser beams may be scanned on the wafers using the same or different power levels of the laser source.

  19. Improved Concentrating Solar Power Systems - Energy Innovation Portal

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

    Solar Thermal Solar Thermal Energy Storage Energy Storage Find More Like This Return to Search Improved Concentrating Solar Power Systems National Renewable Energy Laboratory Contact NREL About This Technology Technology Marketing Summary Concentrating Solar Power (CSP) systems utilize solar energy to drive a thermal power cycle for the generation of electricity. CSP technologies include parabolic trough, linear Fresnel, central receiver or "power tower", and dish/engine systems.

  20. High efficiency solar cells combining a perovskite and a silicon heterojunction solar cells via an optical splitting system

    SciTech Connect

    Uzu, Hisashi E-mail: npark@skku.edu; Ichikawa, Mitsuru; Hino, Masashi; Nakano, Kunihiro; Meguro, Tomomi; Yamamoto, Kenji; Hernández, José Luis; Kim, Hui-Seon; Park, Nam-Gyu E-mail: npark@skku.edu

    2015-01-05

    We have applied an optical splitting system in order to achieve very high conversion efficiency for a full spectrum multi-junction solar cell. This system consists of multiple solar cells with different band gap optically coupled via an “optical splitter.” An optical splitter is a multi-layered beam splitter with very high reflection in the shorter-wave-length range and very high transmission in the longer-wave-length range. By splitting the incident solar spectrum and distributing it to each solar cell, the solar energy can be managed more efficiently. We have fabricated optical splitters and used them with a wide-gap amorphous silicon (a-Si) solar cell or a CH{sub 3}NH{sub 3}PbI{sub 3} perovskite solar cell as top cells, combined with mono-crystalline silicon heterojunction (HJ) solar cells as bottom cells. We have achieved with a 550 nm cutoff splitter an active area conversion efficiency of over 25% using a-Si and HJ solar cells and 28% using perovskite and HJ solar cells.

  1. Revisiting the question: Does high-latitude solar activity lead low-latitude solar activity in time phase?

    SciTech Connect

    Kong, D. F.; Qu, Z. N.; Guo, Q. L.

    2014-05-01

    Cross-correlation analysis and wavelet transform methods are used to investigate whether high-latitude solar activity leads low-latitude solar activity in time phase or not, using the data of the Carte Synoptique solar filaments archive from 1919 March to 1989 December. From the cross-correlation analysis, high-latitude solar filaments have a time lead of 12 Carrington solar rotations with respect to low-latitude ones. Both the cross-wavelet transform and wavelet coherence indicate that high-latitude solar filaments lead low-latitude ones in time phase. Furthermore, low-latitude solar activity is better correlated with high-latitude solar activity of the previous cycle than with that of the following cycle, which is statistically significant. Thus, the present study confirms that high-latitude solar activity in the polar regions is indeed better correlated with the low-latitude solar activity of the following cycle than with that of the previous cycle, namely, leading in time phase.

  2. Solar Flare Activity Closely Monitored | Department of Energy

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

    Solar Flare Activity Closely Monitored Solar Flare Activity Closely Monitored September 11, 2014 - 5:30pm Addthis Dr. Ken Friedman Senior Policy Advisor in the Office of Electricity Delivery and Energy Reliability The National Oceanic and Atmospheric Administration's (NOAA) Space Weather Prediction Center, which provides important resources to describe the space environment, including geomagnetic storms, solar radiation storms and radio blackouts, is forecasting the possibility of

  3. 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.

  4. Rooftop Solar Electric System at Sunset | Department of Energy

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

    Rooftop Solar Electric System at Sunset Rooftop Solar Electric System at Sunset Rooftop Solar Electric System at Sunset In this photograph, a worker inspects the photovoltaic electric array, which is made of SunPower PowerGuard system. SunPower is an industry partner with the U.S. Department of Energy Solar Energy Technologies Program. High Resolution JPG (3.31 MB) More Documents & Publications Rooftop Solar Electric System at Sunset Solar Array on Portland Water Bureau Meter Shop Rooftop

  5. Solar Energy Grid Integration Systems-Advanced Concepts | Department of

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

    Energy Systems Integration » Solar Energy Grid Integration Systems-Advanced Concepts Solar Energy Grid Integration Systems-Advanced Concepts On September 1, 2011, DOE announced $25.9 million to fund eight solar projects that are targeting ways to develop power electronics and build smarter, more interactive systems and components so that solar energy can be integrated into the electric power distribution and transmission grid at higher levels. Part of the SunShot Systems Integration

  6. Commercial dissemination approaches for solar home systems

    SciTech Connect

    Terrado, E.

    1997-12-01

    The author discusses the issue of providing solar home systems to primarily rural areas from the perspective of how to commercialize the process. He considers two different approaches, one an open market approach and the other an exclusive market approach. He describes examples of the exclusive market approach which are in process in Argentina and Brazil. Coming from a banking background, the business aspects are discussed in detail. He points out the strengths and weaknesses of both approaches toward developing such systems.

  7. Massachusetts Policy Guidance for Regulating Solar Energy Systems

    Office of Energy Efficiency and Renewable Energy (EERE)

    This policy guidance was established to summarize, explain, and help communities apply four of the Massachusetts statutes that apply to solar energy systems. These statutes include: Chapter 40A Section 3 (solar exemptions), Chapter 40A Section 9B (solar access), Chapter 187 Section 1A (solar easements), and Chapter 40C (Historic Districts).

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

    Energy Saver

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

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

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

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

  10. Utility-Scale Power Tower Solar Systems: Performance Acceptance...

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

    Utility-Scale Power Tower Solar Systems: Performance Acceptance Test Guidelines David ... DE-AC36-08GO28308 Utility-Scale Power Tower Solar Systems: Performance Acceptance Test ...

  11. Denver Public Schools Get Solar Energy System | Department of...

    Energy.gov [DOE] (indexed site)

    Workers install a solar photovoltaic system on the roof of a Denver school.| Photo courtesy of Main Street Power Workers install a solar photovoltaic system on the roof of a Denver ...

  12. Massachusetts Middle School Goes Local for PV Solar Energy System...

    Energy.gov [DOE] (indexed site)

    New 26 kW solar energy system to be part of curriculum at Norton Middle School. | Photo courtesy of Norton Public Schools New 26 kW solar energy system to be part of curriculum at ...

  13. Advancing State-of-the-Art Concentrating Solar Power Systems...

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

    Advancing State-of-the-Art Concentrating Solar Power Systems Advancing State-of-the-Art Concentrating Solar Power Systems April 15, 2013 - 12:00am Addthis Brayton Energy's...

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

    Energy.gov [DOE] (indexed site)

    Whether a home solar electric system will work for you depends on the available sun ... Whether a home solar electric system will work for you depends on the available sun ...

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

    Energy Saver

    Everything You Wanted to Know About Solar Water Heating Systems Everything You Wanted to Know About Solar Water Heating Systems October 7, 2014 - 2:39pm Q&A What do you want to ...

  16. Thermal model of solar absorption HVAC systems

    SciTech Connect

    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.

  17. Webinar: Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis

    Energy.gov [DOE]

    The Energy Department will present a live webinar titled "Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis" on Thursday, January 21, from 12 to 1 p.m. Eastern Standard Time (EST).

  18. Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis Webinar

    Office of Energy Efficiency and Renewable Energy (EERE)

    Access the recording and download the presentation slides from the Fuel Cell Technologies Office webinar "Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis" held on January 21, 2016.

  19. Solar panel truss mounting systems and methods

    DOEpatents

    Al-Haddad, Tristan Farris; Cavieres, Andres; Gentry, Russell; Goodman, Joseph; Nolan, Wade; Pitelka, Taylor; Rahimzadeh, Keyan; Brooks, Bradley; Lohr, Joshua; Crooks, Ryan; Porges, Jamie; Rubin, Daniel

    2016-06-28

    An exemplary embodiment of the present invention provides a solar panel truss mounting system comprising a base and a truss assembly coupled to the base. The truss assembly comprises a first panel rail mount, second panel rail mount parallel to the first panel rail mount, base rail mount parallel to the first and second panel rail mounts, and a plurality of support members. A first portion of the plurality of support members extends between the first and second panel rail mounts. A second portion of the plurality of support members extends between the first panel rail mount and the base rail mount. A third portion of the plurality of support members extends between the second panel rail mount and the base rail mount. The system can further comprise a plurality of connectors for coupling a plurality of photovoltaic solar panels to the truss assembly.

  20. Solar panel truss mounting systems and methods

    DOEpatents

    Al-Haddad, Tristan Farris; Cavieres, Andres; Gentry, Russell; Goodman, Joseph; Nolan, Wade; Pitelka, Taylor; Rahimzadeh, Keyan; Brooks, Bradley; Lohr, Joshua; Crooks, Ryan; Porges, Jamie; Rubin, Daniel

    2015-10-20

    An exemplary embodiment of the present invention provides a solar panel truss mounting system comprising a base and a truss assembly coupled to the base. The truss assembly comprises a first panel rail mount, second panel rail mount parallel to the first panel rail mount, base rail mount parallel to the first and second panel rail mounts, and a plurality of support members. A first portion of the plurality of support members extends between the first and second panel rail mounts. A second portion of the plurality of support members extends between the first panel rail mount and the base rail mount. A third portion of the plurality of support members extends between the second panel rail mount and the base rail mount. The system can further comprise a plurality of connectors for coupling a plurality of photovoltaic solar panels to the truss assembly.

  1. EIS-0416: Ivanpah Solar Electric Generating System in San Bernardino

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

    County, CA | Department of Energy 6: Ivanpah Solar Electric Generating System in San Bernardino County, CA EIS-0416: Ivanpah Solar Electric Generating System in San Bernardino County, CA Documents Available for Download October 22, 2010 EIS-0416: EPA Notice of Availability of the Final Environmental Impact Statement Ivanpah Solar Electric Generating System (07-AFC-5) Project, Proposal to Construct a 400-m Megawatt Concentrated Solar Power Tower, Thermal-Electric Power Plant, San Bernardino

  2. Concentrating Solar Power Thermal Storage System Basics | Department of

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

    Energy Concentrating Solar Power Thermal Storage System Basics Concentrating Solar Power Thermal Storage System Basics August 21, 2013 - 10:33am Addthis 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. In a concentrating solar power (CSP) system, the sun's rays are reflected onto a receiver, which creates heat that is used to

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

    SciTech Connect

    Not Available

    1985-01-01

    Renewable energy topics are integrated with the study of general science. The literature is provided in the form of a teaching manual and includes such topics as passive solar homes, siting a home for solar energy, and wind power for the home. Other energy topics are explored through library research activities. (BCS)

  4. Ohio Transit System Saves With Solar | Department of Energy

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

    Ohio Transit System Saves With Solar Ohio Transit System Saves With Solar July 23, 2010 - 3:42pm Addthis METRO Regional Transit Authority of Akron, OH is installing a solar energy system such as this on the central bus barn's roof. | Energy Department Photo | METRO Regional Transit Authority of Akron, OH is installing a solar energy system such as this on the central bus barn's roof. | Energy Department Photo | Joshua DeLung What does this project do? The new PV solar energy system being

  5. Photovoltaics and Solar Energy (2 Activities) | Department of Energy

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

    Photovoltaics and Solar Energy (2 Activities) Photovoltaics and Solar Energy (2 Activities) Below is information about the student activity/lesson plan from your search. Grades 5-8 Subject Solar Summary 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

  6. A Solar Cycle Dependence of Nonlinearity in Magnetospheric Activity

    SciTech Connect

    Johnson, Jay R; Wing, Simon

    2005-03-08

    The nonlinear dependencies inherent to the historical K(sub)p data stream (1932-2003) are examined using mutual information and cumulant based cost as discriminating statistics. The discriminating statistics are compared with surrogate data streams that are constructed using the corrected amplitude adjustment Fourier transform (CAAFT) method and capture the linear properties of the original K(sub)p data. Differences are regularly seen in the discriminating statistics a few years prior to solar minima, while no differences are apparent at the time of solar maximum. These results suggest that the dynamics of the magnetosphere tend to be more linear at solar maximum than at solar minimum. The strong nonlinear dependencies tend to peak on a timescale around 40-50 hours and are statistically significant up to one week. Because the solar wind driver variables, VB(sub)s and dynamical pressure exhibit a much shorter decorrelation time for nonlinearities, the results seem to indicate that the nonlinearity is related to internal magnetospheric dynamics. Moreover, the timescales for the nonlinearity seem to be on the same order as that for storm/ring current relaxation. We suggest that the strong solar wind driving that occurs around solar maximum dominates the magnetospheric dynamics suppressing the internal magnetospheric nonlinearity. On the other hand, in the descending phase of the solar cycle just prior to solar minimum, when magnetospheric activity is weaker, the dynamics exhibit a significant nonlinear internal magnetospheric response that may be related to increased solar wind speed.

  7. The solar neighborhood. XXXV. Distances to 1404 M dwarf systems...

    Office of Scientific and Technical Information (OSTI)

    solar neighborhood. XXXV. Distances to 1404 M dwarf systems within 25 PC in the southern sky Citation Details In-Document Search Title: The solar neighborhood. XXXV. Distances to...

  8. Homeowners Guide to Leasing a Solar Electric System (Brochure...

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

    considering installing a solar electric system ... to 25 years for the solar PV panels, and 10 years for the ... homeowner when the total cost of the lease is lower than ...

  9. Wind and Solar-Electric (PV) Systems Exemption | Department of...

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

    taxation, but the real property (i.e., the land on which the solar energy generating system is located) is still subject to property tax. Wind and solar energy production...

  10. Excise Tax Exemption for Solar or Wind Powered Systems

    Energy.gov [DOE]

    Massachusetts law exempts any "solar or wind powered climatic control unit and any solar or wind powered water heating unit or any other type unit or system powered thereby," that qualifies for the...

  11. DOE to Invest in Grid Integration Systems for Solar Energy |...

    Energy Saver

    The projects will focus on solar photovoltaic (PV) systems and will involve such efforts as developing systems that can communicate with an interactive utility grid and advanced ...

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

    SciTech Connect

    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.

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

    SciTech Connect

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

    1980-07-01

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

  14. Integrated Solar Thermochemical Reaction System for High Efficiency

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

    Production of Electricity | Department of Energy Integrated Solar Thermochemical Reaction System for High Efficiency Production of Electricity Integrated Solar Thermochemical Reaction System for High Efficiency Production of Electricity This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 23-25, 2013 near Phoenix, Arizona. csp_review_meeting_042313_wegeng.pdf (2.22 MB) More Documents & Publications Highly Efficient Solar

  15. July 2016 Systems Integration Solar Forecasting:

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

    ... Those costs comprise fuel costs from expensive generators ... an improved-accuracy forecast of the solar power generation. ... analog ensemble for short-term probabilistic solar power ...

  16. Active imaging system with Faraday filter

    DOEpatents

    Snyder, J.J.

    1993-04-13

    An active imaging system has a low to medium powered laser transmitter and receiver wherein the receiver includes a Faraday filter with an ultranarrow optical bandpass and a bare (nonintensified) CCD camera. The laser is locked in the vicinity of the passband of the Faraday filter. The system has high sensitivity to the laser illumination while eliminating solar background.

  17. Passive solar systems performance under conditions in Bulgaria

    SciTech Connect

    Lekov, A.B.; Balcomb, J.D.

    1989-12-01

    This paper presents energy performance of 12 passive solar systems for three climatically different zones of Bulgaria. The results are compared with a base-case residential house that has a design typical for these areas. The different passive solar systems are compared on the basis of the percentage of solar savings and the yield, which is the annual net benefit of adding the passive solar system. The analyses are provided based on monthly meteorological data, and the method used for calculations is the Solar Load Ratio. Recommendations for Bulgarian conditions are given. 5 refs., 4 figs., 1 tab.

  18. Hybrid Wind and Solar Electric Systems | Department of Energy

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

    Buying & Making Electricity » Hybrid Wind and Solar Electric Systems Hybrid Wind and Solar Electric Systems Because the peak operating times for wind and solar systems occur at different times of the day and year, hybrid systems are more likely to produce power when you need it. Because the peak operating times for wind and solar systems occur at different times of the day and year, hybrid systems are more likely to produce power when you need it. According to many renewable energy experts,

  19. Solar-hydrogen energy system for Pakistan

    SciTech Connect

    Lutfi, N.

    1990-01-01

    A solar-hydrogen energy system has been proposed for Pakistan as the best replacement for the present fossil fuel based energy system. It has been suggested to produce hydrogen via photovoltaic-electrolysis, utilizing the available non-agricultural sunny terrain in Baluchistan region. There will be a desalination plant for sea water desalination. The area under the photovoltaic panels with the availability of water would provide suitable environment for growing some cash crops. This would change the cast useless desert land into green productive farms. In order to show the quantitative benefits of the proposed system, future trends of important energy and economical parameters have been studied with and without hydrogen introduction. The following parameters have been included: population, energy demand (fossil + hydrogen), energy production (fossil + hydrogen), gross national product, fossil energy imports, world energy prices, air pollution, quality of life, environmental savings due to hydrogen introduction, savings due to the higher utilization efficiency of hydrogen, by-product credit, agricultural income, income from hydrogen sale, photovoltaic cell area, total land area, water desalination plant capacity, capital investment, operating and maintenance cost, and total income from the system. The results indicate that adopting the solar-hydrogen energy system would eliminate the import dependency of fossil fuels, increase gross product per capita, reduce pollution, improve quality of life and establish a permanent and clean energy system. The total annual expenditure on the proposed system is less than the total income from the proposed system. The availability of water, the cash crop production, electricity and hydrogen would result in rapid development of Baluchistan, the largest province of Pakistan.

  20. Centerless-drive solar collector system

    SciTech Connect

    Butler, B. L.

    1985-12-24

    A parabolic-trough solar collector system is disclosed, with each collector driven to track the sun using a ring driven in centerless fashion. The parabolic troughs are made of laminated plywood or molded or formed of plastics or metals. The drive motor moves a flexible belt, i.e., chain or cable, which is routed about the drive ring on each collector. The motion of the cable moves all drive rings together to track the sun. A photodetector senses the position of the sun and provides the signal needed to drive the collectors in the correct direction.

  1. Economic penalties of problems and errors in solar energy systems

    SciTech Connect

    Raman, K.; Sparkes, H.R.

    1983-01-01

    Experience with a large number of installed solar energy systems in the HUD Solar Program has shown that a variety of problems and design/installation errors have occurred in many solar systems, sometimes resulting in substantial additional costs for repair and/or replacement. In this paper, the effect of problems and errors on the economics of solar energy systems is examined. A method is outlined for doing this in terms of selected economic indicators. The method is illustrated by a simple example of a residential solar DHW system. An example of an installed, instrumented solar energy system in the HUD Solar Program is then discussed. Detailed results are given for the effects of the problems and errors on the cash flow, cost of delivered heat, discounted payback period, and life-cycle cost of the solar energy system. Conclusions are drawn regarding the most suitable economic indicators for showing the effects of problems and errors in solar energy systems. A method is outlined for deciding on the maximum justifiable expenditure for maintenance on a solar energy system with problems or errors.

  2. Solar central receiver systems comparative economics

    SciTech Connect

    Eicker, P J

    1980-04-01

    Several major conceptual design studies of solar central receiver systems and components have been completed in the last year. The results of these studies are used to compare the projected cost of electric power generation using central receiver systems with that of more conventional power generation. The cost estimate for a molten salt central receiver system is given. Levelized busbar energy cost is shown as a function of annual capacity factor indicating the fraction of the cost due to each of the subsystems. The estimated levelized busbar energy cost for a central receiver (70 to 90 mills per kilowatt hour) is compared with the levelized busbar energy cost for a new coal fired Rankine cycle plant. Sensitivities to the initial cost of coal and the delta fuel escalation are shown. (WHK)

  3. Solar Install Mount Production Labor Equipment Simple Balance of Systems |

    Energy Saver

    Industry Scorches Records Solar Industry Scorches Records March 6, 2014 - 5:24pm Addthis Workers install a solar energy system on the rooftop of a home in Golden, Colorado. More than 4,751 megawatts of solar power was installed in the United States last year, an increase of 41%. | Photo by Dennis Schroeder, National Renewable Energy Laboratory Workers install a solar energy system on the rooftop of a home in Golden, Colorado. More than 4,751 megawatts of solar power was installed in the United

  4. Potential of solar cooling systems for peak demand reduction

    SciTech Connect

    Pesaran, A A; Neymark, J

    1994-11-01

    We investigated the technical feasibility of solar cooling for peak demand reduction using a building energy simulation program (DOE2.1D). The system studied was an absorption cooling system with a thermal coefficient of performance of 0.8 driven by a solar collector system with an efficiency of 50% with no thermal storage. The analysis for three different climates showed that, on the day with peak cooling load, about 17% of the peak load could be met satisfactorily with the solar-assisted cooling system without any thermal storage. A performance availability analysis indicated that the solar cooling system should be designed for lower amounts of available solar resources that coincide with the hours during which peak demand reduction is required. The analysis indicated that in dry climates, direct-normal concentrating collectors work well for solar cooling; however, in humid climates, collectors that absorb diffuse radiation work better.

  5. Concentrating Solar Power Dish/Engine System Basics | Department...

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

    The dishengine system is a concentrating solar power (CSP) technology that produces relatively small amounts of electricity compared to other CSP technologies-typically in the ...

  6. Space Dust Analysis Could Provide Clues to Solar System Origins

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

    Space Dust Analysis Could Provide Clues to Solar System Origins Print New studies of space dust captured by NASA's Stardust Interstellar Dust Collector have shown that interstellar ...

  7. NREL: Energy Systems Integration - SolarCity and the Hawaiian...

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

    ESIF to optimize PV inverter technology will ultimately enable greater deployment of solar PV on homes and buildings across the country. Printable Version Energy Systems...

  8. Space Dust Analysis Could Provide Clues to Solar System Origins

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

    Space Dust Analysis Could Provide Clues to Solar System Origins Print New studies of space dust captured by NASA's Stardust Interstellar Dust Collector have shown that interstellar...

  9. New Opportunities for Outer Solar System Science using Radioisotope

    Office of Scientific and Technical Information (OSTI)

    Opportunities for Outer Solar System Science using Radioisotope Electric Propulsion Noble, Robert J.; SLAC; Amini, Rashied; Beauchamp, Patricia M.; Caltech, JPL; Bennett, Gary...

  10. Space Dust Analysis Could Provide Clues to Solar System Origins

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

    chemical clues about the origins of our solar system. ... The aerogel panels were essentially photographed in tiny ... project called Stardust@home, volunteer space ...

  11. Fraunhofer Institute for Solar Energy Systems (ISE) | Open Energy...

    OpenEI (Open Energy Information) [EERE & EIA]

    Fraunhofer Institute for Solar Energy Systems (ISE) is a company located in Cambridge, MA. References "Fraunhofer Website (translated)" Retrieved from "http:...

  12. New Opportunities for Outer Solar System Science using Radioisotope...

    Office of Scientific and Technical Information (OSTI)

    Sponsoring Org: USDOE Country of Publication: United States Language: English Subject: 33 ... PROPULSION; RADIOISOTOPES; RANGE; SOLAR SYSTEM; SPACE; VEHICLES Astrophysics, Word Cloud ...

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

    Energy Saver

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

  14. City of Portland- Streamlined Building Permits for Residential Solar Systems

    Energy.gov [DOE]

    The City of Portland's Bureau of Development Services (BDS) developed a streamlined permitting process for residential solar energy system installations. The City of Portland has staff at the...

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

    Energy.gov [DOE] (indexed site)

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

  16. Concentrating Solar Power Parabolic Trough Systems

    Energy.gov [DOE]

    In this b-roll, the parabolic solar trough is just one of the several types of concentrating solar power technologies that focus the sun's heat using reflective surfaces to generate electricity.

  17. NREL: Energy Systems Integration - Abengoa Solar

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

    Abengoa Solar Photo of a person standing in front of a large 3D visualization screen. Abengoa Solar is leveraging the 3D visualization capabilities of the ESIF Insight Center to...

  18. Small Solar Electric Systems | Department of Energy

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

    ... In addition to solar cells, a typical PV module or solar panel consists of these components: A transparent top surface, usually glass An encapsulant -- usually thin sheets of ethyl ...

  19. Active optical zoom system

    DOEpatents

    Wick, David V.

    2005-12-20

    An active optical zoom system changes the magnification (or effective focal length) of an optical imaging system by utilizing two or more active optics in a conventional optical system. The system can create relatively large changes in system magnification with very small changes in the focal lengths of individual active elements by leveraging the optical power of the conventional optical elements (e.g., passive lenses and mirrors) surrounding the active optics. The active optics serve primarily as variable focal-length lenses or mirrors, although adding other aberrations enables increased utility. The active optics can either be LC SLMs, used in a transmissive optical zoom system, or DMs, used in a reflective optical zoom system. By appropriately designing the optical system, the variable focal-length lenses or mirrors can provide the flexibility necessary to change the overall system focal length (i.e., effective focal length), and therefore magnification, that is normally accomplished with mechanical motion in conventional zoom lenses. The active optics can provide additional flexibility by allowing magnification to occur anywhere within the FOV of the system, not just on-axis as in a conventional system.

  20. Implementation of optimum solar electricity generating system

    SciTech Connect

    Singh, Balbir Singh Mahinder Karim, Samsul Ariffin A.; Sivapalan, Subarna; Najib, Nurul Syafiqah Mohd; Menon, Pradeep

    2014-10-24

    Under the 10{sup th} Malaysian Plan, the government is expecting the renewable energy to contribute approximately 5.5% to the total electricity generation by the year 2015, which amounts to 98MW. One of the initiatives to ensure that the target is achievable was to establish the Sustainable Energy Development Authority of Malaysia. SEDA is given the authority to administer and manage the implementation of the feed-in tariff (FiT) mechanism which is mandated under the Renewable Energy Act 2011. The move to establish SEDA is commendable and the FiT seems to be attractive but there is a need to create awareness on the implementation of the solar electricity generating system (SEGS). In Malaysia, harnessing technologies related to solar energy resources have great potential for implementation. However, the main issue that plagues the implementation of SEGS is the intermittent nature of this source of energy. The availability of sunlight is during the day time, and there is a need for electrical energy storage system, so that there is electricity available during the night time as well. The meteorological condition such as clouds, haze and pollution affects the SEGS as well. The PV based SEGS is seems to be promising electricity generating system that can contribute towards achieving the 5.5% target and will be able to minimize the negative effects of utilizing fossil fuels for electricity generation on the environment. Malaysia is committed to Kyoto Protocol, which emphasizes on fighting global warming by achieving stabilization of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system. In this paper, the technical aspects of the implementation of optimum SEGS is discussed, especially pertaining to the positioning of the PV panels.

  1. Progress in passive solar energy systems. Volume 8. Part 1

    SciTech Connect

    Hayes, J.; Andrejko, D.A.

    1983-01-01

    This book presents the papers given at a conference sponsored by the US DOE, the Solar Energy Research Institute, SolarVision, Inc., and the Southern California Solar Energy Society. The topics considered at the conference included sizing solar energy systems for agricultural applications, a farm scale ethanol production plant, the EEC wind energy RandD program, the passive solar performance assessment of an earth-sheltered house, the ARCO 1 MW photovoltaic power plant, the performance of a dendritic web photovoltaic module, second generation point focused concentrators, linear fresnel lens concentrating photovoltaic collectors, photovoltaic conversion efficiency, amorphous silicon thin film solar cells, a photovoltaic system for a shopping center, photovoltaic power generation for the utility industry, spectral solar radiation, and the analysis of insolation data.

  2. Federal Solar Activities and Policies: Update on Strategic Areas of Focus

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

    Solar Activities & Policies: Update on Strategic Areas of Focus STEAB Meeting October 17, 2007 Tom Kimbis, Market Transformation Director DOE Solar Energy Technologies Program For More Information: http://www.eere.energy.gov/solar/solar_america/ Email: tom.kimbis@ee.doe.gov Tel: 202-586-7055 1 With growing budget, Solar America Initiative is accelerating supply & adoption of PV/CSP technologies Solar Energy Technologies Funding, FY01 - FY08 0 50 100 150 200 250 Budget (Million $) Solar

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

    SciTech Connect

    Not Available

    1980-03-01

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

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

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

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

  5. 9REN Group formerly Gamesa Solar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Group (formerly Gamesa Solar) Place: Madrid, Spain Zip: 28002 Sector: Solar Product: Spanish company active in PV and solar passive system installation and PV project...

  6. Solar energy grid integration systems "SEGIS"

    SciTech Connect

    None, None

    2007-10-01

    The inevitable transformation of the electrical grid to a more distributed generation configuration requires solar system capabilities well beyond simple net-metered, grid-connected approaches. Time-of-use and peak-demand rate structures will require more sophisticated systems designs that integrate energy management and/or energy storage into the system architecture. Controlling power flow into and from the utility grid will be required to ensure grid reliability and power quality. Alternative protection strategies will also be required to accommodate large numbers of distributed energy sources. This document provides an overview of the R&D needs and describes some pathways to promising solutions. The solutions will, in many cases, require R&D of new components, innovative inverter/controllers, energy management systems, innovative energy storage and a suite of advanced control algorithms, technical methodologies, protocols and the associated communications. It is expected that these solutions will help to push the “advanced integrated system” and “smart grid” evolutionary processes forward in a faster but focused manner.

  7. Multi-scale statistical analysis of coronal solar activity

    DOE PAGES [OSTI]

    Gamborino, Diana; del-Castillo-Negrete, Diego; Martinell, Julio J.

    2016-07-08

    Multi-filter images from the solar corona are used to obtain temperature maps that are analyzed using techniques based on proper orthogonal decomposition (POD) in order to extract dynamical and structural information at various scales. Exploring active regions before and after a solar flare and comparing them with quiet regions, we show that the multi-scale behavior presents distinct statistical properties for each case that can be used to characterize the level of activity in a region. Information about the nature of heat transport is also to be extracted from the analysis.

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

    SciTech Connect

    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.

  9. SOLAR SYSTEM MOONS AS ANALOGS FOR COMPACT EXOPLANETARY SYSTEMS

    SciTech Connect

    Kane, Stephen R.; Hinkel, Natalie R.; Raymond, Sean N.

    2013-11-01

    The field of exoplanetary science has experienced a recent surge of new systems that is largely due to the precision photometry provided by the Kepler mission. The latest discoveries have included compact planetary systems in which the orbits of the planets all lie relatively close to the host star, which presents interesting challenges in terms of formation and dynamical evolution. The compact exoplanetary systems are analogous to the moons orbiting the giant planets in our solar system, in terms of their relative sizes and semimajor axes. We present a study that quantifies the scaled sizes and separations of the solar system moons with respect to their hosts. We perform a similar study for a large sample of confirmed Kepler planets in multi-planet systems. We show that a comparison between the two samples leads to a similar correlation between their scaled sizes and separation distributions. The different gradients of the correlations may be indicative of differences in the formation and/or long-term dynamics of moon and planetary systems.

  10. Methods and systems for concentrated solar power

    DOEpatents

    Ma, Zhiwen

    2016-05-24

    Embodiments described herein relate to a method of producing energy from concentrated solar flux. The method includes dropping granular solid particles through a solar flux receiver configured to transfer energy from concentrated solar flux incident on the solar flux receiver to the granular solid particles as heat. The method also includes fluidizing the granular solid particles from the solar flux receiver to produce a gas-solid fluid. The gas-solid fluid is passed through a heat exchanger to transfer heat from the solid particles in the gas-solid fluid to a working fluid. The granular solid particles are extracted from the gas-solid fluid such that the granular solid particles can be dropped through the solar flux receiver again.

  11. Integrating Solar PV in Utility System Operations

    SciTech Connect

    Mills, A.; Botterud, A.; Wu, J.; Zhou, Z.; Hodge, B-M.; Heany, M.

    2013-10-31

    This study develops a systematic framework for estimating the increase in operating costs due to uncertainty and variability in renewable resources, uses the framework to quantify the integration costs associated with sub-hourly solar power variability and uncertainty, and shows how changes in system operations may affect these costs. Toward this end, we present a statistical method for estimating the required balancing reserves to maintain system reliability along with a model for commitment and dispatch of the portfolio of thermal and renewable resources at different stages of system operations. We estimate the costs of sub-hourly solar variability, short-term forecast errors, and day-ahead (DA) forecast errors as the difference in production costs between a case with “realistic” PV (i.e., subhourly solar variability and uncertainty are fully included in the modeling) and a case with “well behaved” PV (i.e., PV is assumed to have no sub-hourly variability and can be perfectly forecasted). In addition, we highlight current practices that allow utilities to compensate for the issues encountered at the sub-hourly time frame with increased levels of PV penetration. In this analysis we use the analytical framework to simulate utility operations with increasing deployment of PV in a case study of Arizona Public Service Company (APS), a utility in the southwestern United States. In our analysis, we focus on three processes that are important in understanding the management of PV variability and uncertainty in power system operations. First, we represent the decisions made the day before the operating day through a DA commitment model that relies on imperfect DA forecasts of load and wind as well as PV generation. Second, we represent the decisions made by schedulers in the operating day through hour-ahead (HA) scheduling. Peaking units can be committed or decommitted in the HA schedules and online units can be redispatched using forecasts that are improved

  12. Webinar: Highly Efficient Solar Thermochemical Reaction Systems...

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

    He is the program manager for the hydrogen production and delivery team in the Fuel Cell ... jointly by Barr Engineering, Diver Solar LLC, Oregon State University, and PNNL, ...

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

    SciTech Connect

    1980-09-01

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

  14. Tax Credit for Solar Energy Systems on Residential Property (Corporate)

    Energy.gov [DOE]

    Note: Act 131 of 2015 repeals the tax credit for available for solar PV systems, and lowers the maximum tax credit available up to $10,000 per system

  15. Effectiveness of energy rating systems in evaluating Solar Decathlon homes

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

    Effectiveness of energy rating systems in evaluating Solar Decathlon homes Elizabeth Buechler 1,2 , Alicen Kandt 2 , and Joe Simon 2 1 Tufts University, Medford, MA 2 National Renewable Energy Laboratory, Golden, CO Introduction Process Outcomes Conclusions & Future Work Acknowledgements What is the U.S. Department of Energy Solar Decathlon? * A competition managed by NREL. Every two years, approximately 20 teams compete to build the most energy-efficient solar home. * The custom homes use

  16. Integrated thermal solar heat pump system

    SciTech Connect

    Shaw, D.N.

    1980-04-08

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

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

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

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

  18. THE MAGNETIC ENERGY-HELICITY DIAGRAM OF SOLAR ACTIVE REGIONS

    SciTech Connect

    Tziotziou, Kostas; Georgoulis, Manolis K.; Raouafi, Nour-Eddine

    2012-11-01

    Using a recently proposed nonlinear force-free method designed for single-vector magnetograms of solar active regions, we calculate the instantaneous free magnetic energy and relative magnetic helicity budgets in 162 vector magnetograms corresponding to 42 different active regions. We find a statistically robust, monotonic correlation between the free magnetic energy and the relative magnetic helicity in the studied regions. This correlation implies that magnetic helicity, in addition to free magnetic energy, may be an essential ingredient for major solar eruptions. Eruptive active regions appear well segregated from non-eruptive ones in both free energy and relative helicity with major (at least M-class) flares occurring in active regions with free energy and relative helicity exceeding 4 Multiplication-Sign 10{sup 31} erg and 2 Multiplication-Sign 10{sup 42} Mx{sup 2}, respectively. The helicity threshold agrees well with estimates of the helicity contents of typical coronal mass ejections.

  19. Solar/hydrogen systems technologies. Volume II (Part 1 of 2). Solar/hydrogen systems assessment. Final report

    SciTech Connect

    Escher, W. J.D.; Foster, R. W.; Tison, R. R.; Hanson, J. A.

    1980-06-02

    Volume II of the Solar/Hydrogen Systems Assessment contract report (2 volumes) is basically a technological source book. Relying heavily on expert contributions, it comprehensively reviews constituent technologies from which can be assembled a wide range of specific solar/hydrogen systems. Covered here are both direct and indirect solar energy conversion technologies; respectively, those that utilize solar radiant energy input directly and immediately, and those that absorb energy from a physical intermediary, previously energized by the sun. Solar-operated hydrogen energy production technologies are also covered in the report. The single most prominent of these is water electrolysis. Utilization of solar-produced hydrogen is outside the scope of the volume. However, the important hydrogen delivery step is treated under the delivery sub-steps of hydrogen transmission, distribution and storage. An exemplary use of the presented information is in the synthesis and analysis of those solar/hydrogen system candidates documented in the report's Volume I. Morever, it is intended that broad use be made of this technology information in the implementation of future solar/hydrogen systems. Such systems, configured on either a distributed or a central-plant basis, or both, may well be of major significance in effecting an ultimate transition to renewable energy systems.

  20. The interaction of active comets with the solar wind

    SciTech Connect

    Neugebauer, M. )

    1990-11-01

    The interaction of the solar wind with active comets is investigated based on observations of cometary plasma processes and studies of comets using telescopes and photographic plates. Data were also collected when a spacecraft flew through the tail of Comet Giacobini-Zinner in 1985 and five spacecraft encountered Comet Halley in 1986. The solar wind is considered to be supersonic (thermal Mach number 2-10) and to carry a magnetic field twisted into an Archimedean spiral by the rotation of the sun. Since the wind can change its properties during the time a spacecraft is inside the ionosphere or magnetosphere of the body being studied, it is difficult to separate spatial from temporal effects. Photoionization results in addition of plasma to the solar wind. Between the outer and inner edges of the cometosheath, the increasing rate of ion pickup causes the flow to slow down until it stagnates, while the plasma density and the magnetic field strength increase.

  1. SOLAR MAGNETIC ACTIVITY CYCLES, CORONAL POTENTIAL FIELD MODELS AND ERUPTION RATES

    SciTech Connect

    Petrie, G. J. D.

    2013-05-10

    We study the evolution of the observed photospheric magnetic field and the modeled global coronal magnetic field during the past 3 1/2 solar activity cycles observed since the mid-1970s. We use synoptic magnetograms and extrapolated potential-field models based on longitudinal full-disk photospheric magnetograms from the National Solar Observatory's three magnetographs at Kitt Peak, the Synoptic Optical Long-term Investigations of the Sun vector spectro-magnetograph, the spectro-magnetograph and the 512-channel magnetograph instruments, and from Stanford University's Wilcox Solar Observatory. The associated multipole field components are used to study the dominant length scales and symmetries of the coronal field. Polar field changes are found to be well correlated with active fields over most of the period studied, except between 2003 and 2006 when the active fields did not produce significant polar field changes. Of the axisymmetric multipoles, only the dipole and octupole follow the poles whereas the higher orders follow the activity cycle. All non-axisymmetric multipole strengths are well correlated with the activity cycle. The tilt of the solar dipole is therefore almost entirely due to active-region fields. The axial dipole and octupole are the largest contributors to the global field except while the polar fields are reversing. This influence of the polar fields extends to modulating eruption rates. According to the Computer Aided CME Tracking, Solar Eruptive Event Detection System, and Nobeyama radioheliograph prominence eruption catalogs, the rate of solar eruptions is found to be systematically higher for active years between 2003 and 2012 than for those between 1997 and 2002. This behavior appears to be connected with the weakness of the late-cycle 23 polar fields as suggested by Luhmann. We see evidence that the process of cycle 24 field reversal is well advanced at both poles.

  2. Solar Self Help Inc aka Light Energy Systems | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Self Help Inc aka Light Energy Systems Jump to: navigation, search Name: Solar Self Help Inc. (aka Light Energy Systems) Place: Concord, California Sector: Solar Product:...

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

    SciTech Connect

    1980-09-01

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

  4. Technical evaluation of a solar heating system having conventional hydronic solar collectors and a radiant panel slab. Final report

    SciTech Connect

    Starr, R.J.

    1984-04-01

    A simple innovative solar heating design (Solar Option One) using conventional hydronic solar collectors and a radiant panel slab was constructed. An objective of hybrid solar design is to combine the relative advantages of active and passive design approaches while minimizing their respective disadvantages. A test house using the Solar Option One heating system was experimentally monitored to determine its energy based performance during the 1982-83 heating season. The test residence is located in Lyndonville, Vermont, an area which has a characteristically cold and cloudy climate. The two story residence has a floor area of about 1400 square feet and is constructed on a 720 square foot 5.5 inch thick floor slab. A 24 inch packed gravel bed is located beneath the slab and the slab-gravel bed is insulated by two inches of polystyrene insulation. The test building is of frame construction and uses insulation levels which have become commonplace throughout the country. The structure would not fall into the superinsulated category but was tightly constructed so as to have a low infiltration level. The building is sun-tempered in that windows were concentrated somewhat on the South side and all but avoided on the North. A solar greenhouse on the South side of the building was closed off from the structure permanently throughout the testing so as to better observe the solar heating invention without confounding variables. The monitoring equipment generated an internal gain of about 17,000 BTUs per day, roughly the equivalent of occupancy by two persons. A full description of the experimental testing program is given. System efficiency and performance are reported.

  5. Systems for Solar Fuels Generation Utilizing PV and Electrolysis Workshop

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

    (Newark, Delaware) - JCAP Systems for Solar Fuels Generation Utilizing PV and Electrolysis Workshop (Newark, Delaware) Systems for Solar Fuels Generation Utilizing PV and Electrolysis Workshop (Newark, Delaware) Mon, Mar 7, 2016 11:30am 11:30 Tue, Mar 8, 2016 12:30pm 12:30 University of Delaware Newark, Delaware Frances Houle, "Solar Fuels Systems Research in the Joint Center for Artificial Photosynthesis" March 6 80th Annual Conference of the DPG & DPG Spring Meeting

  6. Project Profile: Integrated Solar Thermochemical Reaction System...

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

    a solar thermochemical augment of at least 20% to a chemical fuel (i.e., methane from natural gas or biogas) for use in a modified natural-gas combined-cycle (NGCC) power plant. ...

  7. Discovering an Active Subspace in a Single-Diode Solar Cell Model...

    Office of Scientific and Technical Information (OSTI)

    Discovering an Active Subspace in a Single-Diode Solar Cell Model Citation Details In-Document Search Title: Discovering an Active Subspace in a Single-Diode Solar Cell Model ...

  8. Pervasive faint Fe XIX emission from a solar active region observed...

    Office of Scientific and Technical Information (OSTI)

    from a solar active region observed with EUNIS-13: Evidence for nanoflare heating Citation Details In-Document Search Title: Pervasive faint Fe XIX emission from a solar active ...

  9. Solar collection

    SciTech Connect

    Cole, S.L.

    1984-08-01

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

  10. Integrated solar thermochemical reaction system for steam methane reforming

    SciTech Connect

    Zheng, Feng; Diver, Rich; Caldwell, Dustin D.; Fritz, Brad G.; Cameron, Richard J.; Humble, Paul H.; TeGrotenhuis, Ward E.; Dagle, Robert A.; Wegeng, Robert S.

    2015-06-05

    Solar-aided upgrade of the energy content of fossil fuels, such as natural gas, can provide a near-term transition path towards a future solar-fuel economy and reduce carbon dioxide emission from fossil fuel consumption. Both steam and dry reforming a methane-containing fuel stream have been studied with concentrated solar power as the energy input to drive the highly endothermic reactions but the concept has not been demonstrated at a commercial scale. Under a current project with the U.S. Department of Energy, PNNL is developing an integrated solar thermochemical reaction system that combines solar concentrators with micro- and meso-channel reactors and heat exchangers to accomplish more than 20% solar augment of methane higher heating value. The objective of our three-year project is to develop and prepare for commercialization such solar reforming system with a high enough efficiency to serve as the frontend of a conventional natural gas (or biogas) combined cycle power plant, producing power with a levelized cost of electricity less than 6¢/kWh, without subsidies, by the year 2020. In this paper, we present results from the first year of our project that demonstrated a solar-to-chemical energy conversion efficiency as high as 69% with a prototype reaction system.

  11. Integrated solar thermochemical reaction system for steam methane reforming

    DOE PAGES [OSTI]

    Zheng, Feng; Diver, Rich; Caldwell, Dustin D.; Fritz, Brad G.; Cameron, Richard J.; Humble, Paul H.; TeGrotenhuis, Ward E.; Dagle, Robert A.; Wegeng, Robert S.

    2015-06-05

    Solar-aided upgrade of the energy content of fossil fuels, such as natural gas, can provide a near-term transition path towards a future solar-fuel economy and reduce carbon dioxide emission from fossil fuel consumption. Both steam and dry reforming a methane-containing fuel stream have been studied with concentrated solar power as the energy input to drive the highly endothermic reactions but the concept has not been demonstrated at a commercial scale. Under a current project with the U.S. Department of Energy, PNNL is developing an integrated solar thermochemical reaction system that combines solar concentrators with micro- and meso-channel reactors and heatmore » exchangers to accomplish more than 20% solar augment of methane higher heating value. The objective of our three-year project is to develop and prepare for commercialization such solar reforming system with a high enough efficiency to serve as the frontend of a conventional natural gas (or biogas) combined cycle power plant, producing power with a levelized cost of electricity less than 6¢/kWh, without subsidies, by the year 2020. In this paper, we present results from the first year of our project that demonstrated a solar-to-chemical energy conversion efficiency as high as 69% with a prototype reaction system.« less

  12. Solar energy system demonstration project at Wilmington Swim School, New Castle, Delaware. Final report

    SciTech Connect

    None

    1980-07-01

    This document is the Final Report of the Solar Energy System located at the Wilmington, Swim School, New Castle, Delaware. This active solar system is composed of 2,700 square feet of Revere liquid flat plate collectors piped to a 2,800 gallon concrete storage tank located below ground near the building. A micro-computer based control system selects the optimal applications of the stored energy among space, domestic water and pool alternatives. The controlled logic is planned for serving the heat loads in the following order: space heat-new addition, domestic water-entire facility, and pool heating-entire facility. A modified trombe wall passive operation the active system will bypass the areas being served passively. The system was designed for a 40 percent heating and a 30 percent hot water solar contribution.

  13. Solar energy system case study: Telex Communications, Blue Earth, Minnesota

    SciTech Connect

    Raymond, M.G.

    1984-09-01

    A study is made of a solar energy system for space heating a 97,000-square-foot office, factory, and warehouse building owned by Telex Communications, Inc. in Blue Earth, Minnesota. The solar system has 11,520 square feet of ground-oriented flat-plate collectors and a 20,000-gallon storage tank inside the building. Freeze protection is by drainback. Solar heated water from the storage tank circulates around the clock throughout the heating season to heating coils in the ducts. The system achieves its design solar fraction, is efficient, and generally reliable, but not cost-effective. Performance data for the solar system was collected by the National Solar Data Network for three heating seasons from 1978 to 1981. Because of a freeze-up of the collector array in December 1978, the solar system was only partially operational in the 1978 to 1979 heating season. The data in this report were collected in the 1979 to 1980 and 1980 to 1981 heating seasons.

  14. Solar-optical properties of multilayer fenestration systems

    SciTech Connect

    Papamichael, K.; Winkelmann, F.

    1986-11-01

    The bidirectional solar-optical properties of a fenestration system are necessary to accurately determine its luminous and thermal performance. Bidirectional transmittance and reflectance can be determined experimentally for fenestration systems of arbitrary complexity using a scanning radiometer, after which the total directional absorptance can be calculated. However, for the case of multilayer fenestration systems, this approach does not provide information about the net absorptance of each layer. Moreover, the same layers can be ordered in more than one way, resulting in fenestration systems with different solar-optical properties, the determination which requires additional experimental procedures. This paper describes a mathematical model for the calculation of the bidirectional solar-optical properties of multi-layer fenestration systems, using the bidirectional solar-optical properties of each layer. The model is based on the representation of the bidirectional solar-optical properties using matrices. Matrix operations are then used to calculate the bidirectional solar-optical properties of any combination of layers, considering the interreflections between them. This approach offers two advantages: (1) the reduction of the experimental procedures to those required for the determination of the bidirectional transmittance and reflectance of fenestration layers, rather than complete fenestration systems, and (2) the determination of the net absorptance of each layer as part of the fenestration system, rather than the total absorptance of the complete fenestration system. 7 refs., 4 figs., 1 tab.

  15. Comparative study of different solar cooling systems for buildings in subtropical city

    SciTech Connect

    Fong, K.F.; Chow, T.T.; Lee, C.K.; Lin, Z.; Chan, L.S.

    2010-02-15

    In recent years, more and more attention has been paid on the application potential of solar cooling for buildings. Due to the fact that the efficiency of solar collectors is generally low at the time being, the effectiveness of solar cooling would be closely related to the availability of solar irradiation, climatic conditions and geographical location of a place. In this paper, five types of solar cooling systems were involved in a comparative study for subtropical city, which is commonly featured with long hot and humid summer. The solar cooling systems included the solar electric compression refrigeration, solar mechanical compression refrigeration, solar absorption refrigeration, solar adsorption refrigeration and solar solid desiccant cooling. Component-based simulation models of these systems were developed, and their performances were evaluated throughout a year. The key performance indicators are solar fraction, coefficient of performance, solar thermal gain, and primary energy consumption. In addition, different installation strategies and types of solar collectors were compared for each kind of solar cooling system. Through this comparative study, it was found that solar electric compression refrigeration and solar absorption refrigeration had the highest energy saving potential in the subtropical Hong Kong. The former is to make use of the solar electric gain, while the latter is to adopt the solar thermal gain. These two solar cooling systems would have even better performances through the continual advancement of the solar collectors. It will provide a promising application potential of solar cooling for buildings in the subtropical region. (author)

  16. Webinar January 13: Highly Efficient Solar Thermochemical Reaction Systems

    Energy.gov [DOE]

    The Energy Department will present a live webinar entitled "Highly Efficient Solar Thermochemical Reaction Systems" on Tuesday, January 13, from 12:00 to 1:00 p.m. Eastern Standard Time.

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

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

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

  18. The solar neighborhood. XXXV. Distances to 1404 M dwarf systems...

    Office of Scientific and Technical Information (OSTI)

    solar neighborhood. XXXV. Distances to 1404 M dwarf systems within 25 PC in the southern sky Winters, Jennifer G.; Jao, Wei-Chun; Dieterich, Sergio B., E-mail:...

  19. Solar System Tops Off Efficient NREL Building - News Feature...

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

    ... government does not incur the upfront costs of purchasing the PV system," Dins said. "We can accurately budget for a fixed price for solar electricity for a fixed period of time." ...

  20. Impact of SolarSmart Subdivisions on SMUD's Distribution System

    SciTech Connect

    McNutt, P.; Hambrick, J.; Keesee, M.; Brown, D.

    2009-07-01

    This study analyzes the distribution impacts of high penetrations of grid-integrated renewable energy systems, specifically photovoltaic (PV) equipped SolarSmart Homes found in the Anatolia III Residential Community.

  1. NREL Hosts Free Workshop on Residential Solar Energy Systems

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

    Residential Solar Energy Systems For more information contact: e:mail: Public Affairs Golden, Colo., Sept. 1, 1999 Media are invited to attend the upcoming workshop. We also can ...

  2. Local Option- Solar, Wind & Biomass Energy Systems Exemption

    Energy.gov [DOE]

    Section 487 of the New York State Real Property Tax Law provides a 15-year real property tax exemption for solar, wind energy, and farm-waste energy systems constructed in New York State. As curr...

  3. Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis Webinar

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

    Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis U.S. Department of Energy Fuel Cell Technologies Office January 21st, 2016 Presenter: Scott Paap - Sandia National Laboratory DOE Host: Eric Miller - DOE Fuel Cell Technologies Office Question and Answer  Please type your questions into the question box 2 Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary

  4. Solar

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

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

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

    SciTech Connect

    1980-10-01

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

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

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

    Volume 6 Building America Best Practices Series | Department of Energy Home Technologies: Solar Thermal & Photovoltaic Systems; Volume 6 Building America Best Practices Series High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems; Volume 6 Building America Best Practices Series The sixth volume of the Building America Best Practices Series presents information that is useful throughout the United States for enhancing the energy efficiency practices in the specific

  7. Inauguration of Headquarters' Solar Energy System | Department of Energy

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

    Inauguration of Headquarters' Solar Energy System Inauguration of Headquarters' Solar Energy System September 9, 2008 - 3:20pm Addthis Remarks As Prepared for Secretary Bodman Good morning and welcome to you all. This is a great day for the Department of Energy. As America's largest energy consumer, the U.S. government has the responsibility and the opportunity to lead the way to a cleaner, more efficient, more affordable and more secure energy future. In January 2007 President Bush issued an

  8. Blue Lake Rancheria Kicks Off Solar System Construction | Department of

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

    Energy Blue Lake Rancheria Kicks Off Solar System Construction Blue Lake Rancheria Kicks Off Solar System Construction May 9, 2016 - 5:54pm Addthis Blue Lake Rancheria Energy Director Jana Ganion flanked by Kernen Construction Site Supervisor Gavin Johnson (left) and Blue Lake Rancheria Facilities Director Neil Harris (right). Photo from Blue Lake Rancheria Blue Lake Rancheria Energy Director Jana Ganion flanked by Kernen Construction Site Supervisor Gavin Johnson (left) and Blue Lake

  9. How are Homeowners and Businesses Paying for Solar Energy Systems? |

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

    Department of Energy are Homeowners and Businesses Paying for Solar Energy Systems? How are Homeowners and Businesses Paying for Solar Energy Systems? May 2, 2011 - 5:23pm Addthis David Feldman David Feldman Energy Analyst, Department of Energy's National Renewable Energy Laboratory Editor's Note: This entry has been cross-posted from DOE's Energy Blog. We commonly think that the sun provides free energy. That's true, but photovoltaic panels and other equipment to harvest that energy aren't

  10. Spearfish High School, Sparfish, South Dakota solar energy system performance evaluation, September 1980-June 1981

    SciTech Connect

    Howard, B.D.

    1981-01-01

    Spearfish High School in South Dakota contains 43,000 square feet of conditioned space. Its active solar energy system is designed to supply 57% of the space heating and 50% of the hot water demand. The system is equipped with 8034 square feet of flat plate collectors, 4017 cubic feet of rock bin sensible heat storage, and auxiliary equipment including 8 heat pumps, 6 of which are solar supplied and instrumented, air conditioning units, and natural-gas-fired boilers. Performance data are given for the system including the solar fraction, solar savings ratio, conventional fuel savings, system performance factor and solar system coefficient of performance. Insolation, solar energy utilization and operation data are also given. The performance of the collector, storage, domestic hot water and space heating subsystems, the operating energy, energy savings, and weather conditions are also evaluated. Appended are a system description, performance evaluation techniques and equations, site history, long-term weather data, sensor technology, and typical monthly data. (LEW)

  11. Solar Deployment System (SolarDS) Model: Documentation and Sample Results

    SciTech Connect

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

    2009-09-01

    The Solar Deployment System (SolarDS) model is a bottom-up, market penetration model that simulates the potential adoption of photovoltaics (PV) on residential and commercial rooftops in the continental United States through 2030. NREL developed SolarDS to examine the market competitiveness of PV based on regional solar resources, capital costs, electricity prices, utility rate structures, and federal and local incentives. The model uses the projected financial performance of PV systems to simulate PV adoption for building types and regions then aggregates adoption to state and national levels. The main components of SolarDS include a PV performance simulator, a PV annual revenue calculator, a PV financial performance calculator, a PV market share calculator, and a regional aggregator. The model simulates a variety of installed PV capacity for a range of user-specified input parameters. PV market penetration levels from 15 to 193 GW by 2030 were simulated in preliminary model runs. SolarDS results are primarily driven by three model assumptions: (1) future PV cost reductions, (2) the maximum PV market share assumed for systems with given financial performance, and (3) PV financing parameters and policy-driven assumptions, such as the possible future cost of carbon emissions.

  12. Prediction of solar activity from solar background magnetic field variations in cycles 21-23

    SciTech Connect

    Shepherd, Simon J.; Zharkov, Sergei I.; Zharkova, Valentina V. E-mail: s.zharkov@hull.ac.uk

    2014-11-01

    A comprehensive spectral analysis of both the solar background magnetic field (SBMF) in cycles 21-23 and the sunspot magnetic field in cycle 23 reported in our recent paper showed the presence of two principal components (PCs) of SBMF having opposite polarity, e.g., originating in the northern and southern hemispheres, respectively. Over a duration of one solar cycle, both waves are found to travel with an increasing phase shift toward the northern hemisphere in odd cycles 21 and 23 and to the southern hemisphere in even cycle 22. These waves were linked to solar dynamo waves assumed to form in different layers of the solar interior. In this paper, for the first time, the PCs of SBMF in cycles 21-23 are analyzed with the symbolic regression technique using Hamiltonian principles, allowing us to uncover the underlying mathematical laws governing these complex waves in the SBMF presented by PCs and to extrapolate these PCs to cycles 24-26. The PCs predicted for cycle 24 very closely fit (with an accuracy better than 98%) the PCs derived from the SBMF observations in this cycle. This approach also predicts a strong reduction of the SBMF in cycles 25 and 26 and, thus, a reduction of the resulting solar activity. This decrease is accompanied by an increasing phase shift between the two predicted PCs (magnetic waves) in cycle 25 leading to their full separation into the opposite hemispheres in cycle 26. The variations of the modulus summary of the two PCs in SBMF reveals a remarkable resemblance to the average number of sunspots in cycles 21-24 and to predictions of reduced sunspot numbers compared to cycle 24: 80% in cycle 25 and 40% in cycle 26.

  13. General theme report: Working session 2, Solar thermal systems

    SciTech Connect

    Alpert, D.J.; Kolb, G.J.

    1991-01-01

    Currently, over 90% of the world's large-scale solar electric energy is generated with concentrating solar thermal power plants. Such plants have the potential to meet many of the world's future energy needs. Research efforts are generally focused on generating electricity, though a variety of other applications are being pursued. Today, the technology for using solar thermal energy is well developed, cost competitive, and in many cases, ready for widespread application. The current state of each of the solar thermal technologies and their applications is reviewed, and recommendations for increasing their use are presented. The technologies reviewed in detail are: parabolic trough systems, central tower systems, and parabolic dish systems. 20 refs., 1 fig., 1 tab.

  14. Performance of triple effect evacuated solar still system

    SciTech Connect

    Kawahara, Takashi; Toyoshima, Yoshinori; Nakaya, Akira; Narasaki, Yuzo; Kamiya, Ichiro; Sato, Haruki

    1999-07-01

    The authors developed a solar energy distillation system, still, and tested it on 36 days from 23 November 1996 to 23 October 1997 at Keio University in Yokohama. The system consists of a 7.76 m{sup 2} solar collector and 3.7 m{sup 2} solar cells. The still is self-sustainable for use at any place without any fossil energy supply. The maximum mass of water distilled was 13.59 kg/m{sup 2} day (105 kg/day in total mass) on 16 July 1997. the coefficient of performance for distillation was 1,49 of the input solar energy for the system and the energy consumption of a vacuum pump.

  15. Lightweight diaphragm mirror module system for solar collectors

    DOEpatents

    Butler, Barry L.

    1985-01-01

    A mirror module system is provided for accurately focusing solar radiation on a point or a line as defined by an array of solar collectors. Each mirror module includes a flexible membrane stretched over a frame in a manner similar to that of a drum or a trampoline and further includes a silvered glass or plastic mirror for forming an optical reflecting surface. The configuration of the optical reflecting surface is variably adjustable to provide for the accurate focusing of the solar energy on a given collector array, e.g., a point or a linear array arrangement. The flexible mirror-membrane combination is lightweight to facilitate installation and reduce system cost yet structurally strong enough to provide for the precise focusing of the incident solar radiation in a semi-rigid reflector system in which unwanted reflector displacement is minimized.

  16. Lightweight diaphragm mirror module system for solar collectors

    DOEpatents

    Butler, B.L.

    1984-01-01

    A mirror module system is provided for accurately focusing solar radiation on a point or a line as defined by an array of solar collectors. Each mirror module includes a flexible membrane stretched over a frame in a manner similar to that of a drum or a trampoline and further includes a silvered glass or plastic mirror for forming an optical reflecting surface. The configuration of the optical reflecting surface is variably adjustable to provide for the accurate focusing of the solar energy on a given collector array, e.g., a point or a linear array arrangement. The flexible mirror-membrane combination is lightweight to facilitate installation and reduce system cost yet structurally strong enough to provide for the precise focusing of the incident solar radiation in a semi-rigid reflector system in which unwanted reflector displacement is minimized.

  17. Optimized scalable stack of fluorescent solar concentrator systems with bifacial silicon solar cells

    SciTech Connect

    Martínez Díez, Ana Luisa; Gutmann, Johannes; Posdziech, Janina; Rist, Tim; Goldschmidt, Jan Christoph; Plaza, David Gómez

    2014-10-21

    In this paper, we present a concentrator system based on a stack of fluorescent concentrators (FCs) and a bifacial solar cell. Coupling bifacial solar cells to a stack of FCs increases the performance of the system and preserves its efficiency when scaled. We used an approach to optimize a fluorescent solar concentrator system design based on a stack of multiple fluorescent concentrators (FC). Seven individual fluorescent collectors (20 mm×20 mm×2 mm) were realized by in-situ polymerization and optically characterized in regard to their ability to guide light to the edges. Then, an optimization procedure based on the experimental data of the individual FCs was carried out to determine the stack configuration that maximizes the total number of photons leaving edges. Finally, two fluorescent concentrator systems were realized by attaching bifacial silicon solar cells to the optimized FC stacks: a conventional system, where FC were attached to one side of the solar cell as a reference, and the proposed bifacial configuration. It was found that for the same overall FC area, the bifacial configuration increases the short-circuit current by a factor of 2.2, which is also in agreement with theoretical considerations.

  18. EERE Success Story—Advancing State-of-the-Art Concentrating Solar Power Systems

    Energy.gov [DOE]

    New solar receiver for CSP system leads to higher efficiency, increased durability, and reduced cost.

  19. A technoeconomic assessment of solar-assisted biogas systems

    SciTech Connect

    Bansal, N.K. )

    1988-01-01

    Biogas has been recognized as one of the best available renewable and decentralized sources of energy and organic fertilizer for a country like India. There is enough evidence to prove that temperature has a profound influence on the rate of biogas production. In temperate climates, where the winters are mild, solar energy systems can be effectively used to increase the temperature of the biogas digester to the desired level. This paper examines various techniques, such as a solar greenhouse on the biogas digester, a shallow solar pond water heater, insulation, and a heat exchanger, and their technoeconomic viability.

  20. DISTRIBUTION OF ELECTRIC CURRENTS IN SOLAR ACTIVE REGIONS

    SciTech Connect

    Trk, T.; Titov, V. S.; Miki?, Z.; Leake, J. E.; Archontis, V.; Linton, M. G.; Dalmasse, K.; Aulanier, G.; Kliem, B.

    2014-02-10

    There has been a long-standing debate on the question of whether or not electric currents in solar active regions are neutralized. That is, whether or not the main (or direct) coronal currents connecting the active region polarities are surrounded by shielding (or return) currents of equal total value and opposite direction. Both theory and observations are not yet fully conclusive regarding this question, and numerical simulations have, surprisingly, barely been used to address it. Here we quantify the evolution of electric currents during the formation of a bipolar active region by considering a three-dimensional magnetohydrodynamic simulation of the emergence of a sub-photospheric, current-neutralized magnetic flux rope into the solar atmosphere. We find that a strong deviation from current neutralization develops simultaneously with the onset of significant flux emergence into the corona, accompanied by the development of substantial magnetic shear along the active region's polarity inversion line. After the region has formed and flux emergence has ceased, the strong magnetic fields in the region's center are connected solely by direct currents, and the total direct current is several times larger than the total return current. These results suggest that active regions, the main sources of coronal mass ejections and flares, are born with substantial net currents, in agreement with recent observations. Furthermore, they support eruption models that employ pre-eruption magnetic fields containing such currents.

  1. Solar Thermochemical Advanced Reactor System, Wins R&D 100 Award...

    Energy.gov [DOE] (indexed site)

    Developed jointed by BARR Engineering, Diver Solar LLC, Oregon State University, and the Pacific Northwest National Laboratory, the Solar Thermochemical Advanced Reactor System, or ...

  2. Active Diesel Emission Control Systems

    Office of Energy Efficiency and Renewable Energy (EERE)

    2004 Diesel Engine Emissions Reduction (DEER) Conferencen Presentation: RYPOS Active Diesel Emission Control Systems

  3. Solar Energy Educational Material, Activities and Science Projects

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

    Solar Energy Educational Materials Solar with glasses "The sun has produced energy for billions of years. Solar energy is the solar radiation that reaches the earth. Solar energy can be converted directly or indirectly into other forms of energy, such as heat and electricity. ... [It can be] used for heating water for domestic use, space heating of buildings, drying agricultural products, and generating electrical energy." - Edited excerpt from Solar Energy - Energy from the Sun DOE

  4. Solar Design Workbook

    SciTech Connect

    Franta, G.; Baylin, F.; Crowther, R.; Dubin, F.; Grace, A., Griffith, J.W.; Holtz, M.; Kutscher, C.; Nordham, D.; Selkowitz, S.; Villecco, M.

    1981-06-01

    This Solar Design Workbook presents solar building design applications for commercial buildir^s. The book is divided into four sections. The first section describes the variety of solar applications in buildings including conservation aspects, solar fundamentals, passive systems, active systems, daylighting, and other solar options. Solar system design evaluation techniques including considerations for building energy requirements, passive systems, active systems, and economics are presented in Section II. The third section attempts to assist the designer in the building design process for energy conservation and solar applications including options and considerations for pre-design, design, and post-design phases. The information required for the solar design proee^ has not been fully developed at this time. Therefore, Section III is incomplete, but an overview of the considerations with some of the design proces elements is presented. Section IV illustrates ease studies that utilize solar applications in the building design.

  5. Neutron activation analysis system

    DOEpatents

    Taylor, M.C.; Rhodes, J.R.

    1973-12-25

    A neutron activation analysis system for monitoring a generally fluid media, such as slurries, solutions, and fluidized powders, including two separate conduit loops for circulating fluid samples within the range of radiation sources and detectors is described. Associated with the first loop is a neutron source that emits s high flux of slow and thermal neutrons. The second loop employs a fast neutron source, the flux from which is substantially free of thermal neutrons. Adjacent to both loops are gamma counters for spectrographic determination of the fluid constituents. Other gsmma sources and detectors are arranged across a portion of each loop for deterMining the fluid density. (Official Gazette)

  6. Webinar November 19: Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis

    Energy.gov [DOE]

    The Energy Department will present a live webinar titled "Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis" on Thursday, November 19, from 1:00 to 2:00 p.m. EST. This webinar will present the results of an analysis conducted by Sandia National Laboratories that explored potential synergies that may be realized by integrating solar hydrogen production and concentrating solar power (CSP) technologies.

  7. Webinar January 21: Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Energy Department will present a live webinar titled "Potential Strategies for Integrating Solar Hydrogen Production and Concentrating Solar Power: A Systems Analysis" on Thursday, January 21, from 12 to 1 p.m. EST. This webinar will present the results of an analysis conducted by Sandia National Laboratories that explored potential synergies that may be realized by integrating solar hydrogen production and concentrating solar power (CSP) technologies.

  8. Solar Photovoltaic System Design Basics | Department of Energy

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

    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 wind, rain, hail,

  9. The real cost of solar energy in a hybrid system

    SciTech Connect

    Nava, P.

    1996-12-31

    A key figure used to characterize the economic viability of a power project is the LEC (Levelized Electricity Generation Costs). The models (performance model, O and M model, investment cost model, economic model) which feed information into the calculation are briefly described. Examples are given in order to show the high LEC dependency on configuration, location and annual fuel load hours. Then, more in detail, a methodology is sketched how to separate the fuel and the solar related cost in a hybrid system. Using this methodology, the average LEC, the solar related LEC and the fuel related LEC are presented for different plant configurations under varying assumptions of fuel costs. In addition, the level of grant for the solar boiler is calculated which results in equivalent costs for the solar based and fuel based kWh`s.

  10. Performance contracting for parabolic trough solar thermal systems

    SciTech Connect

    Brown, H.; Hewett, R.; Walker, A.; Gee, R.; May, K.

    1997-12-31

    Several applications of solar energy have proven viable in the energy marketplace, due to competitive technology and economic performance. One example is the parabolic trough solar collectors, which use focused solar energy to maximize efficiency and reduce material use in construction. Technical improvements are complemented by new business practices to make parabolic trough solar thermal systems technically and economically viable in an ever widening range of applications. Technical developments in materials and fabrication techniques reduce production cost and expand applications from swimming pool heating and service hot water, to higher-temperature applications such as absorption cooling and process steam. Simultaneously, new financing mechanisms such as a recently awarded US Department of Energy (DOE) Federal Energy Management Program (FEMP) indefinite quantity Energy Savings Performance Contract (Super ESPC) facilitate and streamline implementation of the technology in federal facilities such as prisons and military bases.

  11. Solar Equipment Certification Requirement

    Energy.gov [DOE]

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

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

    Energy.gov [DOE] (indexed site)

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

  13. Dish/Engine System Concentrating Solar Power Basics

    Energy.gov [DOE]

    Dish/engine systems use a parabolic dish of mirrors to direct and concentrate sunlight onto a central engine that produces electricity. The dish/engine system is a concentrating solar power (CSP) technology that produces smaller amounts of electricity than other CSP technologies—typically in the range of 3 to 25 kilowatts—but is beneficial for modular use.

  14. European Neutron Activation System.

    Energy Science and Technology Software Center

    2013-01-11

    Version 03 EASY-2010 (European Activation System) consists of a wide range of codes, data and documentation all aimed at satisfying the objective of calculating the response of materials irradiated in a neutron flux. The main difference from the previous version is the upper energy limit, which has increased from 20 to 60 MeV. It is designed to investigate both fusion devices and accelerator based materials test facilities that will act as intense sources of high-energymore » neutrons causing significant activation of the surrounding materials. The very general nature of the calculational method and the data libraries means that it is applicable (with some reservations) to all situations (e.g. fission reactors or neutron sources) where materials are exposed to neutrons below 60 MeV. EASY can be divided into two parts: data and code development tools and user tools and data. The former are required to develop the latter, but EASY users only need to be able to use the inventory code FISPACT and be aware of the contents of the EAF library (the data source). The complete EASY package contains the FISPACT-2007 inventory code, the EAF-2003, EAF-2005, EAF-2007 and EAF-2010 libraries, and the EASY User Interface for the Window version. The activation package EASY-2010 is the result of significant development to extend the upper energy range from 20 to 60 MeV so that it is capable of being used for IFMIF calculations. The EAF-2010 library contains 66,256 reactions, almost five times more than in EAF-2003 (12,617). Deuteron-induced and proton-induced cross section libraries are also included, and can be used with EASY to enable calculations of the activation due to deuterons and proton [2].« less

  15. Solar-assisted heat pump systems and energy storage

    SciTech Connect

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

    1991-01-01

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

  16. Solar heat pump systems with refrigerant-filled collectors

    SciTech Connect

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

    1983-01-01

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

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

    SciTech Connect

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

    1999-01-08

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

  18. Homeowners Guide to Financing a Grid-Connected Solar Electric System (Brochure), Solar Energy Technologies Program (SETP)

    Office of Energy Efficiency and Renewable Energy (EERE)

    This guide provides an overview of the financing options that may be available to homeowners who are considering installing a solar electric system on their house.

  19. ACTIVITY ANALYSES FOR SOLAR-TYPE STARS OBSERVED WITH KEPLER. I. PROXIES OF MAGNETIC ACTIVITY

    SciTech Connect

    He, Han; Wang, Huaning; Yun, Duo

    2015-11-15

    Light curves of solar-type stars often show gradual fluctuations due to rotational modulation by magnetic features (starspots and faculae) on stellar surfaces. Two quantitative measures of modulated light curves are employed as the proxies of magnetic activity for solar-type stars observed with Kepler telescope. The first is named autocorrelation index i{sub AC}, which describes the degree of periodicity of the light curve; the second is the effective fluctuation range of the light curve R{sub eff}, which reflects the depth of rotational modulation. The two measures are complementary and depict different aspects of magnetic activities on solar-type stars. By using the two proxies i{sub AC} and R{sub eff}, we analyzed activity properties of two carefully selected solar-type stars observed with Kepler (Kepler ID: 9766237 and 10864581), which have distinct rotational periods (14.7 versus 6.0 days). We also applied the two measures to the Sun for a comparative study. The result shows that both the measures can reveal cyclic activity variations (referred to as i{sub AC}-cycle and R{sub eff}-cycle) on the two Kepler stars and the Sun. For the Kepler star with the faster rotation rate, i{sub AC}-cycle and R{sub eff}-cycle are in the same phase, while for the Sun (slower rotator), they are in the opposite phase. By comparing the solar light curve with simultaneous photospheric magnetograms, it is identified that the magnetic feature that causes the periodic light curve during solar minima is the faculae of the enhanced network region, which can also be a candidate of magnetic features that dominate the periodic light curves on the two Kepler stars.

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

    SciTech Connect

    Vourazelis, D.G.

    1990-12-01

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

  1. P50/P90 Analysis for Solar Energy Systems Using the System Advisor Model: Preprint

    SciTech Connect

    Dobos, A. P.; Gilman, P.; Kasberg, M.

    2012-06-01

    To secure competitive financing for a solar energy generation project, the economic risk associated with interannual solar resource variability must be quantified. One way to quantify this risk is to calculate exceedance probabilities representing the amount of energy expected to be produced by a plant. Many years of solar radiation and metereological data are required to determine these values, often called P50 or P90 values for the level of certainty they represent. This paper describes the two methods implemented in the National Renewable Energy Laboratory's System Advisor Model (SAM) to calculate P50 and P90 exceedance probabilities for solar energy projects. The methodology and supporting data sets are applicable to photovoltaic, solar water heating, and concentrating solar power (CSP) systems.

  2. OBSERVATIONS OF HIERARCHICAL SOLAR-TYPE MULTIPLE STAR SYSTEMS

    SciTech Connect

    Roberts, Lewis C. Jr.; Tokovinin, Andrei; Mason, Brian D.; Hartkopf, William I.; Riddle, Reed L.

    2015-10-15

    Twenty multiple stellar systems with solar-type primaries were observed at high angular resolution using the PALM-3000 adaptive optics system at the 5 m Hale telescope. The goal was to complement the knowledge of hierarchical multiplicity in the solar neighborhood by confirming recent discoveries by the visible Robo-AO system with new near-infrared observations with PALM-3000. The physical status of most, but not all, of the new pairs is confirmed by photometry in the Ks band and new positional measurements. In addition, we resolved for the first time five close sub-systems: the known astrometric binary in HIP 17129AB, companions to the primaries of HIP 33555, and HIP 118213, and the companions to the secondaries in HIP 25300 and HIP 101430. We place the components on a color–magnitude diagram and discuss each multiple system individually.

  3. SIMULATION OF THE FORMATION OF A SOLAR ACTIVE REGION

    SciTech Connect

    Cheung, M. C. M.; Title, A. M.; Rempel, M.; Schuessler, M.

    2010-09-01

    We present a radiative magnetohydrodynamics simulation of the formation of an active region (AR) on the solar surface. The simulation models the rise of a buoyant magnetic flux bundle from a depth of 7.5 Mm in the convection zone up into the solar photosphere. The rise of the magnetic plasma in the convection zone is accompanied by predominantly horizontal expansion. Such an expansion leads to a scaling relation between the plasma density and the magnetic field strength such that B {proportional_to} rhov{sup 1/2}. The emergence of magnetic flux into the photosphere appears as a complex magnetic pattern, which results from the interaction of the rising magnetic field with the turbulent convective flows. Small-scale magnetic elements at the surface first appear, followed by their gradual coalescence into larger magnetic concentrations, which eventually results in the formation of a pair of opposite polarity spots. Although the mean flow pattern in the vicinity of the developing spots is directed radially outward, correlations between the magnetic field and velocity field fluctuations allow the spots to accumulate flux. Such correlations result from the Lorentz-force-driven, counterstreaming motion of opposite polarity fragments. The formation of the simulated AR is accompanied by transient light bridges between umbrae and umbral dots. Together with recent sunspot modeling, this work highlights the common magnetoconvective origin of umbral dots, light bridges, and penumbral filaments.

  4. Solar Energy Education. Home economics: student activities. Field...

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

    Citation Details In-Document Search Title: Solar Energy Education. Home economics: student ... A view of solar energy from the standpoint of home economics is taken in this book of ...

  5. Solar Energy Education. Renewable energy activities for junior...

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

    Citation Details In-Document Search Title: Solar Energy Education. Renewable energy ... basic topics on the subject of solar energy are outlined in the form of a teaching manual. ...

  6. Solar

    Energy.gov [DOE]

    Learn about the Energy Department's efforts to advance innovative technologies that drive down the cost of solar energy in America.

  7. A performance data network for solar process heat systems

    SciTech Connect

    Barker, G.; Hale, M.J.

    1996-03-01

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

  8. System requirements specification for a Solar Central Receiver System integrated with a cogeneration facility

    SciTech Connect

    Not Available

    1981-02-24

    The characteristics, design and environmental requirements, and economic data are defined for a Solar Central Receiver System Integrated with a Cogeneration Facility for Copper Smelting. The added solar capacity will supply process heat to an existing copper smelting flash furnace of Finnish design as well as providing for the cogeneration of electricity by an added gas turbine system. Heat storage to accommodate periods of low solar insolation is accomplished by the innovative utilization of copper slag in a thermal energy storage system. The proposed modifications and existing site conditions and facilities are described. Applicable standards and codes, publications, reference documentation, and regulatory information are listed. Design and performance requirements to be met by this solar cogeneration facility are outlined, and the environmental criteria applicable to the plant are addressed. The solar cogeneration facility's characteristics and performance data are specified, along with the plant cost and economic data. Simulation models are also described.

  9. Module Embedded Microninverter Smart Grid Ready Residential Solar Electric System

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

    Impact $3/W total installed price vs. GE base residential system @ $4/W; $0.13/kWh LCOE (< average EIA 2015 retail electricity price) $0.10/W (30%) reduction of microinverter cost, and >$0.25/W reduction of installed price; Safety, MPPT and grid support functions including Volt/VAR support Module Embedded Microninverter Smart Grid Ready Residential Solar Electric System RUI ZHOU/ GE GLOBAL RESEARCH Develop and demonstrate power electronics technologies that address the following

  10. Property Tax Abatement for Solar Electric Systems

    Energy.gov [DOE]

    A Memorandum sent to County Commissioners in February 2011 clarified that residential PV systems that are not used to generate income or in connection with a business may be entirely exempt from ...

  11. SunShot Installs Solar Energy System on Local Habitat for Humanity...

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

    Installs Solar Energy System on Local Habitat for Humanity Home SunShot Installs Solar Energy System on Local Habitat for Humanity Home September 22, 2014 - 5:10pm Addthis 1 of 10 ...

  12. Asola Advanced and Automotive Solar Systems GmbH | Open Energy...

    OpenEI (Open Energy Information) [EERE & EIA]

    Asola Advanced and Automotive Solar Systems GmbH Jump to: navigation, search Name: Asola Advanced and Automotive Solar Systems GmbH Place: Erfurt, Germany Zip: D-99428 Sector:...

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

    SciTech Connect

    Not Available

    1980-05-01

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

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

    SciTech Connect

    Burch, J.; Salasovich, J.

    2005-12-01

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

  15. Analysis of a solar space cooling system using liquid desiccants

    SciTech Connect

    Gandhidasan, P. )

    1990-12-01

    For tropical countries, solar space cooling is an attractive proposition. Dehumidification of air in hot, humid climates is almost as important as cooling. Removal of moisture from the air is much easier to achieve than cooling the air. The proposed cooling system operates on the ventilation mode. The ambient air is dehumidified using liquid desiccants followed by adiabatic evaporative cooling. The desiccant soon becomes saturated with the water extracted from the air and can be regenerated by using solar energy. For this system, a simple expression is derived in this paper to predict the amount of heat removed from the space to be conditioned in terms of known initial parameters through a simplified vapor pressure correlation and effectiveness of the dehumidifier and the heat exchanger. The effect of ambient air conditions, solution concentration, the cooling water temperature and the effectiveness of the dehumidifier and the heat exchanger on the performance of the cooling system are also discussed in this paper.

  16. Assessment of solar options for small power systems applications. Volume V. SOLSTEP: a computer model for solar plant system simulations

    SciTech Connect

    Bird, S.P.

    1980-09-01

    The simulation code, SOLSTEP, was developed at the Pacific Northwest Laboratory to facilitate the evaluation of proposed designs for solar thermal power plants. It allows the user to analyze the thermodynamic and economic performance of a conceptual design for several field size-storage capacity configurations. This feature makes it possible to study the levelized energy cost of a proposed concept over a range of plant capacity factors. The thermodynamic performance is analyzed on a time step basis using actual recorded meteorological and insolation data for specific geographic locations. The flexibility of the model enables the user to analyze both central and distributed generation concepts using either thermal or electric storage systems. The thermodynamic and economic analyses view the plant in a macroscopic manner as a combination of component subsystems. In the thermodynamic simulation, concentrator optical performance is modeled as a function of solar position; other aspects of collector performance can optionally be treated as functions of ambient air temperature, wind speed, and component power level. The power conversion model accounts for the effects of ambient air temperature, partial load operation, auxiliary power demands, and plant standby and startup energy requirements. The code was designed in a modular fashion to provide efficient evaluations of the collector system, total plant, and system economics. SOLSTEP has been used to analyze a variety of solar thermal generic concepts involving several collector types and energy conversion and storage subsystems. The code's straightforward models and modular nature facilitated simple and inexpensive parametric studies of solar thermal power plant performance.

  17. Solar PV Manufacturing Cost Model Group: Installed Solar PV System Prices (Presentation)

    SciTech Connect

    Goodrich, A. C.; Woodhouse, M.; James, T.

    2011-02-01

    EERE's Solar Energy Technologies Program is charged with leading the Secretary's SunShot Initiative to reduce the cost of electricity from solar by 75% to be cost competitive with conventional energy sources without subsidy by the end of the decade. As part of this Initiative, the program has funded the National Renewable Energy Laboratory (NREL) to develop module manufacturing and solar PV system installation cost models to ensure that the program's cost reduction targets are carefully aligned with current and near term industry costs. The NREL cost analysis team has leveraged the laboratories' extensive experience in the areas of project finance and deployment, as well as industry partnerships, to develop cost models that mirror the project cost analysis tools used by project managers at leading U.S. installers. The cost models are constructed through a "bottoms-up" assessment of each major cost element, beginning with the system's bill of materials, labor requirements (type and hours) by component, site-specific charges, and soft costs. In addition to the relevant engineering, procurement, and construction costs, the models also consider all relevant costs to an installer, including labor burdens and overhead rates, supply chain costs, and overhead and materials inventory costs, and assume market-specific profits.

  18. Regulations for the California solar energy tax credit. These regulations apply to solar systems installed during 1981

    SciTech Connect

    Not Available

    1981-01-01

    The text of California Administrative Code Title 20, Chapter 2, Subchapter 8, Article 1 (adopted December 17, 1980 and effective January 1, 1981) is given in which it is stated that the article establishes guidelines and criteria which specify solar energy systems and energy conservation measures applied in conjunction with solar energy systems which are eligible for state tax credits pursuant to the Revenue and Taxation Code. Application and scope; eligibility; building permits; and warranty requirements of the General Provision are given. Definitions are given. Water heating, space conditioning; production of electricity; wind systems; and process heat and solar mechanical energy systems are specified in detail. (MCW)

  19. SPECTROSCOPIC OBSERVATIONS OF Fe XVIII IN SOLAR ACTIVE REGIONS

    SciTech Connect

    Teriaca, Luca; Curdt, Werner; Warren, Harry P.

    2012-08-01

    The large uncertainties associated with measuring the amount of high temperature emission in solar active regions (ARs) represents a significant impediment to making progress on the coronal heating problem. Most current observations at temperatures of 3 MK and above are taken with broadband soft X-ray instruments. Such measurements have proven difficult to interpret unambiguously. Here, we present the first spectroscopic observations of the Fe XVIII 974.86 A emission line in an on-disk AR taken with the SUMER instrument on SOHO. Fe XVIII has a peak formation temperature of 7.1 MK and provides important constraints on the amount of impulsive heating in the corona. Detailed evaluation of the spectra and comparison of the SUMER data with soft X-ray images from the X-Ray Telescope on Hinode confirm that this line is unblended. We also compare the spectroscopic data with observations from the Atmospheric Imaging Assembly (AIA) 94 A channel on the Solar Dynamics Observatory. The AIA 94 A channel also contains Fe XVIII, but is blended with emission formed at lower temperatures. We find that it is possible to remove the contaminating blends and form relatively pure Fe XVIII images that are consistent with the spectroscopic observations from SUMER. The observed spectra also contain the Ca XIV 943.63 A line that, although a factor 2-6 weaker than the Fe XVIII 974.86 A line, allows us to probe the plasma around 3.5 MK. The observed ratio between the two lines indicates (isothermal approximation) that most of the plasma in the brighter Fe XVIII AR loops is at temperatures between 3.5 and 4 MK.

  20. Solar-powered turbocompressor heat pump system

    DOEpatents

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

    1982-08-12

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

  1. Solar energy grid integration systems : final report of the Florida Solar Energy Center Team.

    SciTech Connect

    Ropp, Michael; Gonzalez, Sigifredo; Schaffer, Alan; Katz, Stanley; Perkinson, Jim; Bower, Ward Isaac; Prestero, Mark; Casey, Leo; Moaveni, Houtan; Click, David; Davis, Kristopher; Reedy, Robert; Kuszmaul, Scott S.; Sena-Henderson, Lisa; David, Carolyn; Akhil, Abbas Ali

    2012-03-01

    Initiated in 2008, the Solar Energy Grid Integration Systems (SEGIS) program is a partnership involving the U.S. DOE, Sandia National Laboratories, private sector companies, electric utilities, and universities. Projects supported under the program have focused on the complete-system development of solar technologies, with the dual goal of expanding utility-scale penetration and addressing new challenges of connecting large-scale solar installations in higher penetrations to the electric grid. The Florida Solar Energy Center (FSEC), its partners, and Sandia National Laboratories have successfully collaborated to complete the work under the third and final stage of the SEGIS initiative. The SEGIS program was a three-year, three-stage project that include conceptual design and market analysis in Stage 1, prototype development and testing in Stage 2, and moving toward commercialization in Stage 3. Under this program, the FSEC SEGIS team developed a comprehensive vision that has guided technology development that sets one methodology for merging photovoltaic (PV) and smart-grid technologies. The FSEC team's objective in the SEGIS project is to remove barriers to large-scale general integration of PV and to enhance the value proposition of photovoltaic energy by enabling PV to act as much as possible as if it were at the very least equivalent to a conventional utility power plant. It was immediately apparent that the advanced power electronics of these advanced inverters will go far beyond conventional power plants, making high penetrations of PV not just acceptable, but desirable. This report summarizes a three-year effort to develop, validate and commercialize Grid-Smart Inverters for wider photovoltaic utilization, particularly in the utility sector.

  2. Solar Electric Generating System II finite element analysis

    SciTech Connect

    Dohner, J.L.; Anderson, J.R.

    1994-04-01

    On June 2, 1992, Landers` earthquake struck the Solar Electric Generating System II, located in Daggett, California. The 30 megawatt power station, operated by the Daggett Leasing Corporation (DLC), suffered substantial damage due to structural failures in the solar farm. These failures consisted of the separation of sliding joints supporting a distribution of parabolic glass mirrors. At separation, the mirrors fell to the ground and broke. It was the desire of the DLC and the Solar Thermal Design Assistance Center (STDAC) of Sandia National Laboratories (SNL) and to redesign these joints so that, in the event of future quakes, costly breakage will be avoided. To accomplish this task, drawings of collector components were developed by the STDAC, from which a detailed finite element computer model of a solar collector was produced. This nonlinear dynamic model, which consisted of over 8,560 degrees of freedom, underwent model reduction to form a low order nonlinear dynamic model containing only 40 degrees of freedom. This model was then used as a design tool to estimate joint dynamics. Using this design tool, joint configurations were modified, and an acceptable joint redesign determined. The results of this analysis showed that the implementation of metal stops welded to support shafts for the purpose of preventing joint separation is a suitable joint redesign. Moreover, it was found that, for quakes of Landers` magnitude, mirror breakage due to enhanced vibration in the trough assembly is unlikely.

  3. Forest County Potawatomi Community: Installation of Solar Photovoltaic Systems

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

    Forest County Potawatomi Community Installation of Solar Photovoltaic Systems Presented by: Nathan Karman Legal Department Forest County Potawatomi Community March 27, 2014 "Let us share our natural resources for the good of our People. Let us work for clean air and water and pray for the courage to stand up to those who would abuse our Mother Earth. So be it." - Bemwetek (Elder James Thunder) Excerpt from 2007 Class I Air Redesignation Public Hearing Prayer Community's Commitment to

  4. Solar Survey of PV System Owners: San Diego

    Energy.gov [DOE]

    The purpose of the survey was to understand the motivation, challenges and benefits perceived by individuals who decided to install solar systems in the City of San Diego. Approximately 2000 surveys were sent, and 641 surveys were completed. The primary response was from the residential sector. Individuals had the option to reply electronically, using Survey Monkey, or to complete a paper survey. All responses were combined and checked to ensure that there were no duplicates.

  5. Towards a Design of a Complete Solar Water Splitting System

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

    Towards a Design of a Complete Solar Water Splitting System 1 Feb 2013 BISfuel© : A team of Bisfuel researchers led by Devens Gust, Ana Moore and Tom Moore has designed and characterized an artificial photosynthetic reaction center inspired by natural Photosystem II and comprising a highly oxidizing porphyrin linked to a biomimetic electron transfer relay and a porphyrin electron acceptor. Two articles with the results of the study have appeared in September special issue of PNAS "Chemical

  6. Exploring the Outer Solar System with the ESSENCE Supernova Survey

    SciTech Connect

    Becker, A.C.; Arraki, K.; Kaib, N.A.; Wood-Vasey, W.M.; Aguilera, C.; Blackman, J.W.; Blondin, S.; Challis, P.; Clocchiatti, A.; Covarrubias, R.; Damke, G.; Davis, T.M.; Filippenko, A.V.; Foley, R.J.; Garg, A.; Garnavich, P.M.; Hicken, M.; Jha, S.; Kirshner, R.P.; Krisciunas, K.; Leibundgut, B.; /Munich, Tech. U. /UC, Berkeley /NOAO, Tucson /Washington U., Seattle, Astron. Dept. /Fermilab /Harvard-Smithsonian Ctr. Astrophys. /Harvard U. /Chile U., Santiago /Ohio State U. /Cerro-Tololo InterAmerican Obs. /Harvard U. /Baltimore, Space Telescope Sci. /Johns Hopkins U. /Australian Natl. U., Canberra /Australian Natl. U., Canberra /Cerro-Tololo InterAmerican Obs. /Munich, Tech. U. /Harvard-Smithsonian Ctr. Astrophys. /Harvard U. /Cerro-Tololo InterAmerican Obs. /Texas A-M /Cerro-Tololo InterAmerican Obs.

    2011-11-10

    We report the discovery and orbital determination of 14 trans-Neptunian objects (TNOs) from the ESSENCE Supernova Survey difference imaging data set. Two additional objects discovered in a similar search of the SDSS-II Supernova Survey database were recovered in this effort. ESSENCE repeatedly observed fields far from the solar system ecliptic (-21{sup o} < {beta} < -5{sup o}), reaching limiting magnitudes per observation of I {approx} 23.1 and R {approx} 23.7. We examine several of the newly detected objects in detail, including 2003 UC{sub 414}, which orbits entirely between Uranus and Neptune and lies very close to a dynamical region that would make it stable for the lifetime of the solar system. 2003 SS{sub 422} and 2007 TA{sub 418} have high eccentricities and large perihelia, making them candidate members of an outer class of TNOs. We also report a new member of the 'extended' or 'detached' scattered disk, 2004 VN{sub 112}, and verify the stability of its orbit using numerical simulations. This object would have been visible to ESSENCE for only {approx}2% of its orbit, suggesting a vast number of similar objects across the sky. We emphasize that off-ecliptic surveys are optimal for uncovering the diversity of such objects, which in turn will constrain the history of gravitational influences that shaped our early solar system.

  7. Solar

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

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

  8. Solar

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

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

  9. System Performance Measurement Supports Design Recommendations for Solar Ventilation Preheat System (Brochure)

    SciTech Connect

    Not Available

    2011-08-01

    Technical briefing to report the outcomes of a data monitoring effort to determine the nature of solar vent preheat system performance problems at a U.S. military installation. The analysis reports up-to-date research and findings regarding system design, helping to clarify the issue as a factor of system design, rather than a shortcoming of SVP systems.

  10. Solar energy grid integration systems - Energy storage (SEGIS-ES)

    SciTech Connect

    Ton, Dan; Peek, Georgianne H.; Hanley, Charles; Boyes, John

    2008-05-01

    In late 2007, the U.S. Department of Energy (DOE) initiated a series of studies to address issues related to potential high penetration of distributed photovoltaic (PV) generation systems on our nation’s electric grid. This Renewable Systems Interconnection (RSI) initiative resulted in the publication of 14 reports and an Executive Summary that defined needs in areas related to utility planning tools and business models, new grid architectures and PV systems configurations, and models to assess market penetration and the effects of high-penetration PV systems. As a result of this effort, the Solar Energy Grid Integration Systems (SEGIS) program was initiated in early 2008. SEGIS is an industry-led effort to develop new PV inverters, controllers, and energy management systems that will greatly enhance the utility of distributed PV systems.

  11. Active stewardship: sustainable future

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

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

  12. Solar Deployment System (SolarDS) Model: Documentation and Sample Results

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

    Solar Decathlon Solar Decathlon 1 of 69 Stevens Institute of Technology won top honors at the U.S. Department of Energy Solar Decathlon on October 17, 2015 overall by designing, building, and operating the most cost-effective, energy-efficient and attractive solar powered house. University at Buffalo, The State University of New York took second place followed by California Polytechnic State University, San Luis Obispo in third place. Image: Thomas Kelsey, U.S. Department of Energy Solar

  13. U.S. Solar Photovoltaic System Cost Benchmark: Q1 2016, NREL...

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

    U.S. Solar Photovoltaic System Cost Benchmark: Q1 2016 Ran Fu, CFA Donald Chung Travis ... year, our report benchmarks costs of U.S. solar PV for residential, commercial, and ...

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

    Energy.gov [DOE] (indexed site)

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

  15. Generic solar photovoltaic system dynamic simulation model specification.

    SciTech Connect

    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.

  16. Solar hydrogen energy system. Annual report, 1995--1996

    SciTech Connect

    Veziroglu, T.N.

    1996-12-31

    The paper reports progress on three tasks. Task A, System comparison of hydrogen with other alternative fuels in terms of EPACT requirements, investigates the feasibility of several alternative fuels, namely, natural gas, methanol, ethanol, hydrogen and electricity, to replace 10% of gasoline by the year 2000. The analysis was divided into two parts: analysis of vehicle technologies and analysis of fuel production, storage and distribution. Task B, Photovoltaic hydrogen production, involves this fuel production method for the future. The process uses hybrid solar collectors to generate dc electricity, as well as high temperature steam for input to the electrolyzer. During the first year, solar to hydrogen conversion efficiencies have been considered. The third task, Hydrogen safety studies, covers two topics: a review of codes, standards, regulations, recommendations, certifications, and pamphlets which address safety of gaseous fuels; and an experimental investigation of hydrogen flame impingement.

  17. Optical system for determining physical characteristics of a solar cell

    DOEpatents

    Sopori, Bhushan L.

    2001-01-01

    The invention provides an improved optical system for determining the physical characteristics of a solar cell. The system comprises a lamp means for projecting light in a wide solid-angle onto the surface of the cell; a chamber for receiving the light through an entrance port, the chamber having an interior light absorbing spherical surface, an exit port for receiving a beam of light reflected substantially normal to the cell, a cell support, and an lower aperture for releasing light into a light absorbing baffle; a means for dispersing the reflection into monochromatic components; a means for detecting an intensity of the components; and a means for reporting the determination.

  18. SolarCity and the Hawaiian Electric Companies | Energy Systems Integration

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

    | NREL SolarCity and the Hawaiian Electric Companies NREL is collaborating with SolarCity at the Energy Systems Integration Facility (ESIF) to address the safety, reliability, and stability challenges of interconnecting high penetrations of distributed photovoltaics (PV) with the electric power system. "We know how important the option of solar is for our customers. Solving these issues requires that everyone-utilities, the solar industry, and other leading technical experts like

  19. EERE Success Story-Solar Thermochemical Advanced Reactor System...

    Office of Environmental Management (EM)

    to make solar energy cost-competitive with other ... 100 Awards Concentrated solar panels are getting a power boost. ... By installing the pictured device in front of a ...

  20. SolarBridge Technologies formerly SmartSpark Energy Systems ...

    OpenEI (Open Energy Information) [EERE & EIA]

    Texas Zip: 78731 Sector: Solar Product: Developing a micro-inverter for residential solar panels, and charge equalisers to improve life for battery-powered equipment....

  1. Material and Chemical Processing (Concentrated Solar) (4 Activities...

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

    Grades 5-8 Subject Solar Summary Concentrated sunlight is a versatile and high-quality form of energy with several ... reactions, and to treat materials for increased hardness ...

  2. SunShot Initiative Installs Solar Energy System | Department of Energy

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

    SunShot Initiative Installs Solar Energy System SunShot Initiative Installs Solar Energy System Addthis 1 of 10 SunShot Initiative team members install a solar energy system on a Habitat for Humanity home in Washington, D.C. on Friday, September 19. The project was organized by GRID Alternatives, the nation's largest solar non-profit organization, as part of a two-day event to bring solar power to underserved communities. Image: Jamie Nolan 2 of 10 A volunteer from the SunShot Initiative helps

  3. MAGNETIC HELICITY AND ENERGY SPECTRA OF A SOLAR ACTIVE REGION

    SciTech Connect

    Zhang, Hongqi; Brandenburg, Axel; Sokoloff, D. D.

    2014-04-01

    We compute for the first time the magnetic helicity and energy spectra of the solar active region NOAA 11158 during 2011 February 11-15 at 20° southern heliographic latitude using observational photospheric vector magnetograms. We adopt the isotropic representation of the Fourier-transformed two-point correlation tensor of the magnetic field. The sign of the magnetic helicity turns out to be predominantly positive at all wavenumbers. This sign is consistent with what is theoretically expected for the southern hemisphere. The magnetic helicity normalized to its theoretical maximum value, here referred to as relative helicity, is around 4% and strongest at intermediate wavenumbers of k ≈ 0.4 Mm{sup –1}, corresponding to a scale of 2π/k ≈ 16 Mm. The same sign and a similar value are also found for the relative current helicity evaluated in real space based on the vertical components of magnetic field and current density. The modulus of the magnetic helicity spectrum shows a k {sup –11/3} power law at large wavenumbers, which implies a k {sup –5/3} spectrum for the modulus of the current helicity. A k {sup –5/3} spectrum is also obtained for the magnetic energy. The energy spectra evaluated separately from the horizontal and vertical fields agree for wavenumbers below 3 Mm{sup –1}, corresponding to scales above 2 Mm. This gives some justification to our assumption of isotropy and places limits resulting from possible instrumental artifacts at small scales.

  4. Adobe Solar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Adobe Solar Jump to: navigation, search Logo: Adobe Solar Name: Adobe Solar Place: Denver, Colorado Region: Rockies Area Sector: Solar Product: solar electric systems Phone Number:...

  5. solar

    National Nuclear Security Administration (NNSA)

    2%2A en Solar power purchase for DOE laboratories http:nnsa.energy.govmediaroompressreleasessolarpower

  6. The Borrower's Guide to Financing Solar Energy Systems: A Federal Overview: Second Edition

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

    FINANCING SOLAR ENERGY SYSTEMS S E C O N D E D I T I O N PREPARED BY THE U.S. DEPARTMENT OF ENERGY T H E B O R R O W E R ' S G U I D E T O a federal overview C O N T E N T S Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Quick Guide to Financing Programs . . . . . . . . . . 4 About Today's Solar Systems . . . . . . . . . . . . . . . . 7 Photovoltaic Power Systems . . . . . . . . . . . . . . . . . . 7 Solar Thermal Systems . . . . . . . . . . . . . . . . . . . . .

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

    SciTech Connect

    1980-09-01

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

  8. Forest County Potawatomi Community Installation of Solar Photovoltaic Systems

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

    Installation of Solar Photovoltaic Systems Presented by: Tansey Smith Sustainability Coordinator Land and Natural Resources May 7, 2015 The People The Potawatomi were once a part of a historical confederacy made up of the Ojibwa, Odawa and Potawatomi Nations known as the Council of the Three Fires. The Ojibwa were addressed as the "Older Brother" as such were also the "Keeper of the Faith". The Odawa were referred to as the "Middle Brother" and were the

  9. Generalized Einstein-Aether theories and the Solar System

    SciTech Connect

    Bonvin, Camille; Durrer, Ruth; Ferreira, Pedro G.; Zlosnik, Tom G.; Starkman, Glenn

    2008-01-15

    It has been shown that generalized Einstein-Aether theories may lead to significant modifications to the nonrelativistic limit of the Einstein equations. In this paper we study the effect of a general class of such theories on the Solar System. We consider corrections to the gravitational potential in negative and positive powers of distance from the source. Using measurements of the perihelion shift of Mercury and time delay of radar signals to Cassini, we place constraints on these corrections. We find that a subclass of generalized Einstein-Aether theories is compatible with these constraints.

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

    DOEpatents

    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.

  11. Solar Water Heating with Low-Cost Plastic Systems

    SciTech Connect

    2012-01-01

    Federal buildings consumed over 392,000 billion Btu of site delivered energy for buildings during FY 2007 at a total cost of $6.5 billion. Earlier data indicate that about 10% of this is used to heat water.[2] Targeting energy consumption in Federal buildings, the Energy Independence and Security Act of 2007 (EISA) requires new Federal buildings and major renovations to meet 30% of their hot water demand with solar energy, provided it is cost-effective over the life of the system. In October 2009, President Obama expanded the energy reduction and performance requirements of EISA and its subsequent regulations with his Executive Order 13514.

  12. System specification for Fort Hood Solar Cogeneration Facility

    SciTech Connect

    Not Available

    1981-05-01

    The characteristics and design and environmental requirements are specified for a solar cogeneration facility at the Fort Hood Army Base in Killeen, Texas. Characteristics of the system and major elements are described, and applicable standards, codes, laws and regulations are listed. Performance requirements for the total system and for each individual subsystem are presented. Survival requirements are given for various environmental extremes, with consideration given to lightning protection and effects of direct or adjacent lightning strikes. Air quality control standards are briefly mentioned. The facility operates in two principal modes: energy collection and energy utilization. The plant is capable of operating in either mode independently or in both modes simultaneously. The system is also operational in transitional and standby/inactive modes. (LEW)

  13. Matter effects in active-sterile solar neutrino oscillations

    SciTech Connect

    Giunti, C.; Li, Y. F.

    2009-12-01

    The matter effects for solar neutrino oscillations are studied in a general scheme with an arbitrary number of sterile neutrinos, without any constraint on the mixing, assuming only a realistic hierarchy of neutrino squared-mass differences in which the smallest squared-mass difference is effective in solar neutrino oscillations. The validity of the analytic results are illustrated with a numerical solution of the evolution equation in three examples of the possible mixing matrix in the simplest case of four-neutrino mixing.

  14. Performance evaluation of a low-temperature solar Rankine cycle system utilizing R245fa

    SciTech Connect

    Wang, X.D.; Zhao, L.; Wang, J.L.; Zhang, W.Z.; Zhao, X.Z.; Wu, W.

    2010-03-15

    A low-temperature solar Rankine system utilizing R245fa as the working fluid is proposed and an experimental system is designed, constructed and tested. Both the evacuated solar collectors and the flat plate solar collectors are used in the experimental system; meanwhile, a rolling-piston R245fa expander is also mounted in the system. The new designed R245fa expander works stably in the experiment, with an average expansion power output of 1.73 kW and an average isentropic efficiency of 45.2%. The overall power generation efficiency estimated is 4.2%, when the evacuated solar collector is utilized in the system, and with the condition of flat plate solar collector, it is about 3.2%. The experimental results show that using R245fa as working fluid in the low-temperature solar power Rankine cycle system is feasible and the performance is acceptable. (author)

  15. Aspen Solar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    Sector: Solar Product: Design, installation & maintenance of active, passive, and photovoltaic energy systems Website: www.aspensolar.com Coordinates: 39.649755, -106.617574...

  16. Disformal theories of gravity: from the solar system to cosmology

    SciTech Connect

    Sakstein, Jeremy

    2014-12-01

    This paper is concerned with theories of gravity that contain a scalar coupled both conformally and disformally to matter through the metric. By systematically deriving the non-relativistic limit, it is shown that no new non-linear screening mechanisms are present beyond the Vainshtein mechanism and chameleon-like screening. If one includes the cosmological expansion of the universe, disformal effects that are usually taken to be absent can be present in the solar system. When the conformal factor is absent, fifth-forces can be screened on all scales when the cosmological field is slowly-rolling. We investigate the cosmology of these models and use local tests of gravity to place new constraints on the disformal coupling and find M?>O(eV), which is not competitive with laboratory tests. Finally, we discuss the future prospects for testing these theories and the implications for other theories of modified gravity. In particular, the Vainshtein radius of solar system objects can be altered from the static prediction when cosmological time-derivatives are non-negligible.

  17. Incentive Pass-through for Residential Solar Systems in California

    Office of Energy Efficiency and Renewable Energy (EERE)

    The deployment of solar photovoltaic (PV) systems has grown rapidly over the last decade, partly because of various government incentives. In the United States, those established in California are among the largest and longest-running incentives. Building on past research, this report addresses the still-unanswered question: to what degree have the direct PV incentives in California been passed along from installers to consumers? This report addresses this question by carefully examining the residential PV market in California and applying both a structural-modeling approach and a reduced-form regression analysis to estimate the incentive pass-through rate. The results suggest an average pass-through rate of direct incentives of nearly 100%, but with regional differences among California counties. While these results could have multiple explanations, they suggest a relatively competitive market and well-functioning subsidy program. Further analysis is required to determine whether similar results broadly apply to other states, to other customer segments, to all third-party-owned PV systems, or to all forms of financial incentives for solar.

  18. Impact of Improved Solar Forecasts on Bulk Power System Operations in ISO-NE: Preprint

    SciTech Connect

    Brancucci Martinez-Anido, C.; Florita, A.; Hodge, B. M.

    2014-09-01

    The diurnal nature of solar power is made uncertain by variable cloud cover and the influence of atmospheric conditions on irradiance scattering processes. Its forecasting has become increasingly important to the unit commitment and dispatch process for efficient scheduling of generators in power system operations. This study examines the value of improved solar power forecasting for the Independent System Operator-New England system. The results show how 25% solar power penetration reduces net electricity generation costs by 22.9%.

  19. EERE Success Story-Solar Thermochemical Advanced Reactor System, Wins R&D

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

    100 Award | Department of Energy Thermochemical Advanced Reactor System, Wins R&D 100 Award EERE Success Story-Solar Thermochemical Advanced Reactor System, Wins R&D 100 Award October 16, 2014 - 5:24pm Addthis Developed jointed by BARR Engineering, Diver Solar LLC, Oregon State University, and the Pacific Northwest National Laboratory, the Solar Thermochemical Advanced Reactor System, or STARS, converts natural gas and sunlight into a more energy-rich fuel called syngas, which power

  20. THE ACOUSTIC CUTOFF FREQUENCY OF THE SUN AND THE SOLAR MAGNETIC ACTIVITY CYCLE

    SciTech Connect

    Jimenez, A.; Palle, P. L.; Garcia, R. A.

    2011-12-20

    The acoustic cutoff frequency-the highest frequency for acoustic solar eigenmodes-is an important parameter of the solar atmosphere as it determines the upper boundary of the p-mode resonant cavities. At frequencies beyond this value, acoustic disturbances are no longer trapped but are traveling waves. Interference among them gives rise to higher-frequency peaks-the pseudomodes-in the solar acoustic spectrum. The pseudomodes are shifted slightly in frequency with respect to p-modes, making possible the use of pseudomodes to determine the acoustic cutoff frequency. Using data from the GOLF and VIRGO instruments on board the Solar and Heliospheric Observatory spacecraft, we calculate the acoustic cutoff frequency using the coherence function between both the velocity and intensity sets of data. By using data gathered by these instruments during the entire lifetime of the mission (1996 until the present), a variation in the acoustic cutoff frequency with the solar magnetic activity cycle is found.

  1. Homeowners Guide to Financing a Grid-Connected Solar Electric System (Brochure)

    SciTech Connect

    Not Available

    2010-10-01

    This guide provides an overview of the financing options that may be available to homeowners who are considering installing a solar electric system on their house.

  2. Homeowners Guide to Financing a Grid-Connected Solar Electric System

    SciTech Connect

    Solar Energy Technologies Program

    2010-10-11

    This guide provides an overview of the financing options that may be available to homeowners who are considering installing a solar electric system on their house.

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

    Office of Energy Efficiency and Renewable Energy (EERE)

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

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

    SciTech Connect

    James, Ted; Feldman, David; Margolis, Robert

    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.

  5. Indonesia solar home systems project for rural electrification

    SciTech Connect

    Sanghvi, A.P.

    1997-12-01

    This paper presents, from a financing aspect the broad issues involved in a plan to provide solar home systems (SHS) to provide rural electrification in several areas of rural Indonesia. The paper discusses the approaches being used to provide funding, develop awareness of the technology, and assure the success of the project. The plan involves the use of grant money to help with some of the initial costs of such systems, and thereby to encourage local financing on a terms rather than cash basis. There are needs for market development, and development of a business structure in the country to support this type of technology. Provided this plan can succeed, it may serve as a model for further efforts.

  6. Puerto Rico- Tax Deduction for Solar Energy Systems

    Energy.gov [DOE]

    Puerto Rico offers a 30% tax deduction (up to $1,500) for expenses incurred in the purchase and installation of solar equipment to heat water for residential use. "Solar equipment" is defined as ...

  7. Paying For Solar - Tips For Financing a Residential System |...

    Energy.gov [DOE] (indexed site)

    you to jump onto the solar bandwagon as soon as possible and start increasing the value of your home. The simplest way of obtaining capital to go solar is through a loan, which ...

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

    SciTech Connect

    Not Available

    2012-01-01

    Newly developed solar water heating technology can help Federal agencies cost effectively meet the EISA requirements for solar water heating in new construction and major renovations. This document provides design considerations, application, economics, and maintenance information and resources.

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

    Energy.gov [DOE] (indexed site)

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

  10. Solar Radiation Research Laboratory | Energy Systems Integration | NREL

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

    Solar Radiation Research Laboratory Since 1981, NREL's Solar Radiation Research Laboratory (SRRL) has been collecting continuous measurements of basic solar radiation components, and has expanded its expertise to include integrated metrology, optics, electronics, data acquisition capabilities, and outdoor performance testing. Photo of a man outdoors working with metrology equipment The SRRL is located on NREL's main campus in Golden, Colorado, where it has excellent solar access because of its

  11. SOLERAS - Solar Controlled Environment Agriculture Project. Final report, Volume 4. Saudi Engineering Solar Energy Applications System Design Study

    SciTech Connect

    Not Available

    1985-01-01

    Literature summarizing a study on the Saudi Arabian solar controlled environment agriculture system is presented. Specifications and performance requirements for the system components are revealed. Detailed performance and cost analyses are used to determine the optimum design. A preliminary design of an engineering field test is included. Some weather data are provided for Riyadh, Saudi Arabia. (BCS)

  12. Combustion system for hybrid solar fossil fuel receiver

    DOEpatents

    Mehos, Mark S.; Anselmo, Kenneth M.; Moreno, James B.; Andraka, Charles E.; Rawlinson, K. Scott; Corey, John; Bohn, Mark S.

    2004-05-25

    A combustion system for a hybrid solar receiver comprises a pre-mixer which combines air and fuel to form an air-fuel mixture. The mixture is introduced tangentially into a cooling jacket. A burner plenum is fluidically connected to the cooling jacket such that the burner plenum and the cooling jacket are arranged in thermal contact with one another. The air-fuel mixture flows through the cooling jacket cooling the burner plenum to reduce pre-ignition of the air-fuel mixture in the burner plenum. A combustion chamber is operatively associated with and open to the burner plenum to receive the air-fuel mixture from the burner plenum. An igniter is operatively positioned in the combustion chamber to combust the air-fuel mixture, releasing heat. A recuperator is operatively associated with the burner plenum and the combustion chamber and pre-heats the air-fuel mixture in the burner plenum with heat from the combustion chamber. A heat-exchanger is operatively associated and in thermal contact with the combustion chamber. The heat-exchanger provides heat for the hybrid solar receiver.

  13. Solar-Powered Charging Systems to Help Hurricane Recovery Efforts - News

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

    Releases | NREL Solar-Powered Charging Systems to Help Hurricane Recovery Efforts September 23, 2005 Golden, Colo. - The U.S. Department of Energy's National Renewable Energy Laboratory (NREL), working in partnership with the Florida Solar Energy Center (FSEC), is providing solar electric charging stations to help residents of Kiln, Miss., recover from the devastation of Hurricane Katrina. The systems will provide much needed power to this town of about 2,000 people, located 13 miles north

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

    SciTech Connect

    1981-03-01

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

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

    SciTech Connect

    Givoni, B. )

    1991-01-01

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

  16. Decision process for the retrofit of municipal buildings with solar energy systems: a technical guide

    SciTech Connect

    Licciardello, Michael R.; Wood, Brian; Dozier, Warner; Braly, Mark; Yates, Alan

    1980-11-01

    As a background for solar applications, the following topics are covered: solar systems and components for retrofit installations; cost, performance, and quality considerations; and financing alternatives for local government. The retrofit decision process is discussed as follows: pre-screening of buildings, building data requirements, the energy conservation audit, solar system sizing and economics, comparison of alternatives, and implementation. Sample studies are presented for the West Valley Animal Shelter and the Hollywood Police Station. (MHR)

  17. Self-consistent simulation of CdTe solar cells with active defects

    SciTech Connect

    Brinkman, Daniel; Guo, Da; Akis, Richard; Ringhofer, Christian; Sankin, Igor; Fang, Tian; Vasileska, Dragica

    2015-07-21

    We demonstrate a self-consistent numerical scheme for simulating an electronic device which contains active defects. As a specific case, we consider copper defects in cadmium telluride solar cells. The presence of copper has been shown experimentally to play a crucial role in predicting device performance. The primary source of this copper is migration away from the back contact during annealing, which likely occurs predominantly along grain boundaries. We introduce a mathematical scheme for simulating this effect in 2D and explain the numerical implementation of the system. Lastly, we will give numerical results comparing our results to known 1D simulations to demonstrate the accuracy of the solver and then show results unique to the 2D case.

  18. Self-consistent simulation of CdTe solar cells with active defects

    SciTech Connect

    Brinkman, Daniel; Ringhofer, Christian; Guo, Da; Akis, Richard; Vasileska, Dragica; Sankin, Igor; Fang, Tian

    2015-07-21

    We demonstrate a self-consistent numerical scheme for simulating an electronic device which contains active defects. As a specific case, we consider copper defects in cadmium telluride solar cells. The presence of copper has been shown experimentally to play a crucial role in predicting device performance. The primary source of this copper is migration away from the back contact during annealing, which likely occurs predominantly along grain boundaries. We introduce a mathematical scheme for simulating this effect in 2D and explain the numerical implementation of the system. Finally, we will give numerical results comparing our results to known 1D simulations to demonstrate the accuracy of the solver and then show results unique to the 2D case.

  19. Self-consistent simulation of CdTe solar cells with active defects

    DOE PAGES [OSTI]

    Brinkman, Daniel; Guo, Da; Akis, Richard; Ringhofer, Christian; Sankin, Igor; Fang, Tian; Vasileska, Dragica

    2015-07-21

    We demonstrate a self-consistent numerical scheme for simulating an electronic device which contains active defects. As a specific case, we consider copper defects in cadmium telluride solar cells. The presence of copper has been shown experimentally to play a crucial role in predicting device performance. The primary source of this copper is migration away from the back contact during annealing, which likely occurs predominantly along grain boundaries. We introduce a mathematical scheme for simulating this effect in 2D and explain the numerical implementation of the system. Lastly, we will give numerical results comparing our results to known 1D simulations tomore » demonstrate the accuracy of the solver and then show results unique to the 2D case.« less

  20. Solar Resource & Meteorological Assessment Project (SOLRMAP): Observed Atmospheric and Solar Information System (OASIS); Tucson, Arizona (Data)

    DOE Data Explorer

    Wilcox, S.; Andreas, A.

    The U.S. Department of Energy's National Renewable Energy Laboratory collaborates with the solar industry to establish high quality solar and meteorological measurements. This Solar Resource and Meteorological Assessment Project (SOLRMAP) provides high quality measurements to support deployment of power projects in the United States. The no-funds-exchanged collaboration brings NREL solar resource assessment expertise together with industry needs for measurements. The end result is high quality data sets to support the financing, design, and monitoring of large scale solar power projects for industry in addition to research-quality data for NREL model development. NREL provides consultation for instrumentation and station deployment, along with instrument calibrations, data acquisition, quality assessment, data distribution, and summary reports. Industry participants provide equipment, infrastructure, and station maintenance.

  1. Solar Resource & Meteorological Assessment Project (SOLRMAP): Observed Atmospheric and Solar Information System (OASIS); Tucson, Arizona (Data)

    DOE Data Explorer

    Wilcox, S.; Andreas, A.

    2010-11-03

    The U.S. Department of Energy's National Renewable Energy Laboratory collaborates with the solar industry to establish high quality solar and meteorological measurements. This Solar Resource and Meteorological Assessment Project (SOLRMAP) provides high quality measurements to support deployment of power projects in the United States. The no-funds-exchanged collaboration brings NREL solar resource assessment expertise together with industry needs for measurements. The end result is high quality data sets to support the financing, design, and monitoring of large scale solar power projects for industry in addition to research-quality data for NREL model development. NREL provides consultation for instrumentation and station deployment, along with instrument calibrations, data acquisition, quality assessment, data distribution, and summary reports. Industry participants provide equipment, infrastructure, and station maintenance.

  2. Performance of a solar heating system on the LSU field house determined from test data

    SciTech Connect

    Maples, D.; Whitehouse, G.D.

    1981-01-01

    Performance data was collected and analyzed for a solar heating system installed on the Field House at Louisiana State University. The solar system performed as expected for periods that it operated. Problems encountered are discussed. Efficiency of flat-plate collectors used was determined. 2 refs.

  3. edition Not Available 14 SOLAR ENERGY; SOLAR ENERGY; EDUCATIONAL...

    Office of Scientific and Technical Information (OSTI)

    Home economics: student activities. Field test edition Not Available 14 SOLAR ENERGY; SOLAR ENERGY; EDUCATIONAL TOOLS; CURRICULUM GUIDES; GLAZING; HOUSES; SOLAR COOKERS; SOLAR...

  4. Thermal and economic analysis of a solar multi-effect desalination system

    SciTech Connect

    Hamed, O.A.

    1996-10-01

    The performance of a solar multieffect desalination pilot plant has been studied over an extended period of one year. The impact of solar flux, ambient and sea water temperatures on the monthly average water production and plant performance ratios are investigated. The specific thermal and electric energy requirements of the system have been examined and compared with the requirements of conventional fossil fuel powered desalination plants. The economic viability of the solar desalination system has been assessed. It reveals that the capital and operating costs represent around 93 and 7 percent of the overall water production cost respectively. The capital cost critically depends on solar radiation and distiller performance ratio.

  5. Maintenance of solar systems--Housing and urban development demonstration program

    SciTech Connect

    Freeborne, W.E.

    1983-06-01

    The Department of Housing and Urban Development (HUD) residential solar heating and cooling demonstration program provided funding support for over 600 solar projects. These projects provide the largest single data base of solar heating and cooling experience now available. These data suggest that maintenance and system operation have been mixed even though system configurations are similar throughout the program. HUD has been involved in the upgrading of one-third of the 600 solar projects and now can report that projects can be maintained with a more uniform level of effort.

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

    SciTech Connect

    Not Available

    1980-01-01

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

  7. SPI Solar and Trimark | Energy Systems Integration | NREL

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

    SPI Solar and Trimark SPI Solar, Trimark, and NREL are partnering to optimize the thermal and optical performance of parabolic trough receivers-critical components of concentrating solar power (CSP) plants. Photo of parabolic trough receiver equipment in a laboratory Photo by Dennis Schroeder Receivers in CSP plants take a lot of abuse, from dramatic temperature changes to numerous mechanical stresses. Finding ways to make the receivers more resilient and optimize their performance under these

  8. Low temperature solar-to-electric power conversion system

    SciTech Connect

    Vitale, N.G.

    1993-07-20

    An electric power generating apparatus is described, including: a solar collector; a primary thermal loop including primary thermal fluid; a cavity receiver to receive reflected solar energy from the solar reflector, convert the solar energy into thermal energy, and transmit the thermal energy to the primary thermal fluid by heating the primary thermal fluid not to exceed a given temperature, the given temperature being substantially equal to 700 F; a Stirling engine receiving the primary thermal fluid heated by the cavity receiver, including means to generate mechanical power and means to generate electrical power from the means to generate mechanical power.

  9. Project Profile: High-Efficiency Thermal Storage System for Solar...

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

    Publications, Patents, and Awards At this time, this project does not have published articles, patents, or awards. Learn about other DOE competitive awards for concentrating solar ...

  10. Optimizing Geothermal with Geo-Solar Hybrid Systems | Department...

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

    geothermal plant and solar photovoltaic field, for a total installed capacity of 60 MW. Source: Enel Green Power North America DOE is exploring the potential of using hybrid ...

  11. Advancing State-of-the-Art Concentrating Solar Power Systems...

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

    turbines for higher efficiency, and reduced cost compared with baseline receivers and steam Rankine turbines. The Solar Energy Technologies Office (SETO) focuses on achieving...

  12. Space Nuclear Power and Propulsion - a basic Tool for the manned Exploration of the Solar System

    SciTech Connect

    Frischauf, Norbert; Hamilton, Booz Allen

    2004-07-01

    Humanity has started to explore space more than 40 years ago. Numerous spacecraft have left the Earth in this endeavour, but while unmanned spacecraft were already sent out on missions, where they would eventually reach the outer limits of the Solar System, manned exploration has always been confined to the tiny bubble of the Earth's gravitational well, stretching out at maximum to our closest celestial companion - the Moon - during the era of the Apollo programme in the late 60's and early 70's. When mankind made its giant leap, the exploration of our cosmic neighbour was seen as the initial step for the manned exploration of the whole Solar System. Consequently ambitious research and development programmes were undertaken at that time to enable what seemed to be the next logical steps: the establishment of a permanent settled base on the Moon and the first manned mission to Mars in the 80's. Nuclear space power and propulsion played an important role in these entire future scenarios, hence ambitious development programmes were undertaken to make these technologies available. Unfortunately the 70's-paradigm shift in space policies did not only bring an end to the Apollo programme, but it also brought a complete halt to all of these technology programmes and confined the human presence in space to a tiny bubble including nothing more than the Earth's sphere and a mere shell of a few hundred kilometres of altitude, too small to even include the Moon. Today, after more than three decades, manned exploration of the Solar System has become an issue again and so are missions to Moon and Mars. However, studies and analyses show that all of these future plans are hampered by today's available propulsion systems and by the problematic of solar power generation at distances at and beyond of Mars, a problem, however, that can readily be solved by the utilisation of space nuclear reactors and propulsion systems. This paper intends to provide an overview on the various fission

  13. Active microrheology in active matter systems: Mobility, intermittency...

    Office of Scientific and Technical Information (OSTI)

    Citation Details In-Document Search This content will become publicly available on March 24, 2016 Title: Active microrheology in active matter systems: Mobility, intermittency, and...

  14. Characterization of selected application of biomass energy technologies and a solar district heating and cooling system

    SciTech Connect

    D'Alessio, Dr., Gregory J.; Blaunstein, Robert P.

    1980-09-01

    The following systems are discussed: energy self-sufficient farms, wood gasification, energy from high-yield silviculture farms, and solar district heating and cooling. System descriptions and environmental data are included for each one. (MHR)

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

    SciTech Connect

    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)

  16. Evaluation of glare at the Ivanpah Solar Electric Generating System

    DOE PAGES [OSTI]

    Ho, C. K.; Sims, C. A.; Christian, J. M.

    2015-06-05

    The Ivanpah Solar Electric Generating System (ISEGS), located on I-15 about 40 miles (60 km) south of Las Vegas, NV, consists of three power towers 459 ft (140 m) tall and over 170,000 reflective heliostats with a rated capacity of 390 MW. In addition, reports of glare from the plant have been submitted by pilots and air traffic controllers and recorded by the Aviation Safety Reporting System and the California Energy Commission since 2013. Aerial and ground-based surveys of the glare were conducted in April, 2014, to identify the cause and to quantify the irradiance and potential ocular impacts ofmore » the glare. Results showed that the intense glare viewed from the airspace above ISEGS was caused by heliostats in standby mode that were aimed to the side of the receiver. Evaluation of the glare showed that the retinal irradiance and subtended source angle of the glare from the heliostats in standby were sufficient to cause significant ocular impact (potential for after-image) up to a distance of ~6 miles (10 km), but the values were below the threshold for permanent eye damage. Glare from the receivers had a low potential for after-image at all ground-based monitoring locations outside of the site boundaries. A Letter to Airmen has been issued by the Federal Aviation Administration to notify pilots of the potential glare hazards. Additional measures to mitigate the potential impacts of glare from ISGES are also presented and discussed.« less

  17. Evaluation of glare at the Ivanpah Solar Electric Generating System

    SciTech Connect

    Ho, C. K.; Sims, C. A.; Christian, J. M.

    2015-06-05

    The Ivanpah Solar Electric Generating System (ISEGS), located on I-15 about 40 miles (60 km) south of Las Vegas, NV, consists of three power towers 459 ft (140 m) tall and over 170,000 reflective heliostats with a rated capacity of 390 MW. In addition, reports of glare from the plant have been submitted by pilots and air traffic controllers and recorded by the Aviation Safety Reporting System and the California Energy Commission since 2013. Aerial and ground-based surveys of the glare were conducted in April, 2014, to identify the cause and to quantify the irradiance and potential ocular impacts of the glare. Results showed that the intense glare viewed from the airspace above ISEGS was caused by heliostats in standby mode that were aimed to the side of the receiver. Evaluation of the glare showed that the retinal irradiance and subtended source angle of the glare from the heliostats in standby were sufficient to cause significant ocular impact (potential for after-image) up to a distance of ~6 miles (10 km), but the values were below the threshold for permanent eye damage. Glare from the receivers had a low potential for after-image at all ground-based monitoring locations outside of the site boundaries. A Letter to Airmen has been issued by the Federal Aviation Administration to notify pilots of the potential glare hazards. Additional measures to mitigate the potential impacts of glare from ISGES are also presented and discussed.

  18. The Development of a Roof Integrated Solar Hot Water System

    SciTech Connect

    Menicucci, David F.; Moss, Timothy A.; Palomino, G. Ernest

    2006-09-01

    The Salt River Project (SRP), in conjunction with Sandia National Laboratories (SNL) and Energy Laboratories, Inc. (ELI), collaborated to develop, test, and evaluate an advanced solar water-heating product for new homes. SRP and SNL collaborated under a Department of Energy Cooperative Research and Development Agreement (CRADA), with ELI as SRP's industry partner. The project has resulted in the design and development of the Roof Integrated Thermal Siphon (RITH) system, an innovative product that features complete roof integration, a storage tank in the back of the collector and below the roofline, easy installation by homebuilders, and a low installed cost. SRP's market research guided the design, and the laboratory tests conducted at SNL provided information used to refine the design of field test units and indicated that the RITH concept is viable. ELI provided design and construction expertise and is currently configured to manufacture the units. This final report for the project provides all of the pertinent and available materials connected to the project including market research studies, the design features and development of the system, and the testing and evaluation conducted at SNL and at a model home test site in Phoenix, Arizona.

  19. Concentrating Solar Power Projects | Concentrating Solar Power | NREL

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

    Projects SolarPACES Snapshot SolarPACES, an international program of the International Energy Agency, furthers collaborative development, testing, and marketing of concentrating solar power plants. Activities include testing large-scale systems and developing advanced technologies, components, instrumentation, and analysis techniques. Founded in 1977, SolarPACES now has 13 members: Algeria, Australia, Egypt, the European Commission, France, Germany, Israel, Mexico, South Africa, South Korea,

  20. Concentrating Solar Deployment System (CSDS) -- A New Model for Estimating U.S. Concentrating Solar Power (CSP) Market Potential: Preprint

    SciTech Connect

    Blair, N.; Mehos, M.; Short, W.; Heimiller, D.

    2006-04-01

    This paper presents the Concentrating Solar Deployment System Model (CSDS). CSDS is a multiregional, multitime-period, Geographic Information System (GIS), and linear programming model of capacity expansion in the electric sector of the United States. CSDS is designed to address the principal market and policy issues related to the penetration of concentrating solar power (CSP) electric-sector technologies. This paper discusses the current structure, capabilities, and assumptions of the model. Additionally, results are presented for the impact of continued research and development (R&D) spending, an extension to the investment tax credit (ITC), and use of a production tax credit (PTC). CSDS is an extension of the Wind Deployment System (WinDS) model created at the National Renewable Energy Laboratory (NREL). While WinDS examines issues related to wind, CSDS is an extension to analyze similar issues for CSP applications. Specifically, a detailed representation of parabolic trough systems with thermal storage has been developed within the existing structure.

  1. Periodic analysis of solar activity and its link with the Arctic oscillation phenomenon

    SciTech Connect

    Qu, Weizheng; Li, Chun; Du, Ling; Huang, Fei [Ocean University of China, 14-1'-601, 2117 Jinshui Road, Qingdao 266100 (China); Li, Yanfang, E-mail: quweizhe@ouc.edu.cn [Yantai Institute of Coastal Zone Research Chinese Academy of Sciences (China)

    2014-12-01

    Based on spectrum analysis, we provide the arithmetic expressions of the quasi 11 yr cycle, 110 yr century cycle of relative sunspot numbers, and quasi 22 yr cycle of solar magnetic field polarity. Based on a comparative analysis of the monthly average geopotential height, geopotential height anomaly, and temperature anomaly of the northern hemisphere at locations with an air pressure of 500 HPa during the positive and negative phases of AO (Arctic Oscillation), one can see that the abnormal warming period in the Arctic region corresponds to the negative phase of AO, while the anomalous cold period corresponds to its positive phase. This shows that the abnormal change in the Arctic region is an important factor in determining the anomalies of AO. In accordance with the analysis performed using the successive filtering method, one can see that the AO phenomenon occurring in January shows a clear quasi 88 yr century cycle and quasi 22 yr decadal cycle, which are closely related to solar activities. The results of our comparative analysis show that there is a close inverse relationship between the solar activities (especially the solar magnetic field index changes) and the changes in the 22 yr cycle of the AO occurring in January, and that the two trends are basically opposite of each other. That is to say, in most cases after the solar magnetic index MI rises from the lowest value, the solar magnetic field turns from north to south, and the high-energy particle flow entering the Earth's magnetosphere increases to heat the polar atmosphere, thus causing the AO to drop from the highest value; after the solar magnetic index MI drops from the highest value, the solar magnetic field turns from south to north, and the solar high-energy particle flow passes through the top of the Earth's magnetosphere rather than entering it to heat the polar atmosphere. Thus the polar temperature drops, causing the AO to rise from the lowest value. In summary, the variance contribution

  2. EE Solar Energy Efficiency Solar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    EE Solar Energy Efficiency Solar Jump to: navigation, search Name: EE Solar (Energy Efficiency Solar) Place: Ponoma, California Zip: 91768 Product: PV systems installer based in...

  3. Critical issues in the development of hybrid solar/gas receivers for dish/Stirling systems

    SciTech Connect

    Adkins, D.R.; Rawlinson, K.S.

    1991-12-31

    A hybrid solar/gas receiver system will allow Stirling engines to operate with combined solar and gas power sources. One of the most attractive options for building a hybrid system is to integrate a gas-fired heat pipe directly into a heat-pipe solar receiver. Before this union can take place, however, a number of technical issues must be resolved. A design must be found that properly distributes the heat-pipe`s working fluid over the heated surfaces and prevents fluid from accumulating at undesirable locations in the heat pipe. Experience that has been gained in developing solar receivers and gas-fired heat pipes under recent Department of Energy solar-thermal dish-electric programs is used in this paper to address many of the technical obstacles to building receiver systems. 16 refs.

  4. Critical issues in the development of hybrid solar/gas receivers for dish/Stirling systems

    SciTech Connect

    Adkins, D.R.; Rawlinson, K.S.

    1991-01-01

    A hybrid solar/gas receiver system will allow Stirling engines to operate with combined solar and gas power sources. One of the most attractive options for building a hybrid system is to integrate a gas-fired heat pipe directly into a heat-pipe solar receiver. Before this union can take place, however, a number of technical issues must be resolved. A design must be found that properly distributes the heat-pipe's working fluid over the heated surfaces and prevents fluid from accumulating at undesirable locations in the heat pipe. Experience that has been gained in developing solar receivers and gas-fired heat pipes under recent Department of Energy solar-thermal dish-electric programs is used in this paper to address many of the technical obstacles to building receiver systems. 16 refs.

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

    SciTech Connect

    Not Available

    1980-04-01

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

  6. NONLINEAR DYNAMICS OF MAGNETOHYDRODYNAMIC ROSSBY WAVES AND THE CYCLIC NATURE OF SOLAR MAGNETIC ACTIVITY

    SciTech Connect

    Raphaldini, Breno; Raupp, Carlos F. M. E-mail: carlos.raupp@iag.usp.br

    2015-01-20

    The solar dynamo is known to be associated with several periodicities, with the nearly 11/22 yr cycle being the most pronounced one. Even though these quasiperiodic variations of solar activity have been attributed to the underlying dynamo action in the Sun's interior, a fundamental theoretical description of these cycles is still elusive. Here, we present a new possible direction in understanding the Sun's cycles based on resonant nonlinear interactions among magnetohydrodynamic (MHD) Rossby waves. The WKB theory for dispersive waves is applied to magnetohydrodynamic shallow-water equations describing the dynamics of the solar tachocline, and the reduced dynamics of a resonant triad composed of MHD Rossby waves embedded in constant toroidal magnetic field is analyzed. In the conservative case, the wave amplitudes evolve periodically in time, with periods on the order of the dominant solar activity timescale (∼11 yr). In addition, the presence of linear forcings representative of either convection or instabilities of meridionally varying background states appears to be crucial in balancing dissipation and thus sustaining the periodic oscillations of wave amplitudes associated with resonant triad interactions. Examination of the linear theory of MHD Rossby waves embedded in a latitudinally varying mean flow demonstrates that MHD Rossby waves propagate toward the equator in a waveguide from –35° to 35° in latitude, showing a remarkable resemblance to the structure of the butterfly diagram of the solar activity. Therefore, we argue that resonant nonlinear magnetohydrodynamic Rossby wave interactions might significantly contribute to the observed cycles of magnetic solar activity.

  7. Concentrating Solar Power

    SciTech Connect

    Not Available

    2008-09-01

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

  8. SOLERAS - Solar Energy Water Desalination Project: Catalytic. System design final report. Volume 1. System requirement definition and system analysis

    SciTech Connect

    Not Available

    1986-01-01

    Catalytic Inc. was awarded a contract to conduct a preliminary system design and cost analysis for a brackish water desalination project to be located in Brownsville, Texas. System analyses and economic analyses were performed to define the baseline solar energy desalination system. The baseline system provides an average daily product water capacity of 6000 mT. The baseline system is optimal relative to technological risk, performance, and product water cost. Subsystems and their interfaces have been defined and product water cost projections made for commercial plants in a range of capacities. Science Applications, Inc. (SAI), subcontractor to Catalytic, had responsibility for the solar power system. This, the final report, summarizes the work performed under the Phase I effort.

  9. Innovative Ballasted Flat Roof Solar PV Racking System

    SciTech Connect

    Peek, Richard T.

    2015-01-23

    The objective of this project was to reduce the cost of racking for PV solar on flat commercial rooftops. Cost reductions would come from both labor savings and material savings related to the installation process. The rack would need to accommodate the majority of modules available on the market. Cascade Engineering has a long history of converting traditional metal type applications over to plastic. Injection molding of plastics have numerous advantages including selection of resin for the application, placing the material exactly where it is needed, designing in features that will speed up the installation process, and weight reduction of the array. A plastic rack would need to meet the requirements of UL2703, Mounting systems, mounting devices, clamping/retention devices, and ground lugs for use with flat-plate photovoltaic modules and panels. Comparing original data to the end of project racking design, racking material costs were reduced 50% and labor costs reduced 64%. The racking product accommodates all 60 and 72 cell panels on the market, meets UL2703 requirements, contributes only 1.3 pounds per square foot of weight to the array, requires little ballast to secure the array, automatically grounds the module when the module is secured, stacks/nests well for shipping/fewer lifts to the roof, provides integrated wire routing, allows water to drain on the roof, and accommodates various seismic roof connections. Project goals were achieved as noted in the original funding application.

  10. Massless scalar field and solar-system experiments

    SciTech Connect

    Formiga, J. B.

    2011-04-15

    The solution of Einstein's field equations with the energy-momentum tensor of a massless scalar field is known as the Fisher solution. It is well known that this solution has a naked singularity due to the ''charge''{Sigma} of the massless scalar field. Here I obtain the radial null geodesic of the Fisher solution and use it to confirm that there is no black hole. In addition, I use the parametrized post-Newtonian formalism to show that the Fisher spacetime predicts the same effects on solar-system experiments as the Schwarzschild one does, as long as we impose a limit on {Sigma}. I show that this limit is not a strong constraint and we can even take values of {Sigma} bigger than M. By using the exact formula of the redshift and some assumptions, I evaluate this limit for the experiment of Pound and Snider [Phys. Rev. 140, B788 (1965)]. It turns out that this limit is {Sigma}<5.8x10{sup 3} m.

  11. Progress in solar engineering

    SciTech Connect

    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.

  12. Scaled Solar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

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

  13. First Solar | Open Energy Information

    OpenEI (Open Energy Information) [EERE & EIA]

    First Solar Name: First Solar Address: 350 West Washington Street, Suite 600 Place: Tempe, Arizona Zip: 85281 Sector: Solar Product: Solar energy systems Year Founded: 1999 Phone...

  14. NREL: Energy Analysis - Solar Technology Analysis

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

    Solar Technology Analysis NREL conducts analysis to support research and development done by the Solar Energy Technologies Program in three major technology areas: concentrating solar power; solar electricity, also known as photovoltaics or PV; and solar heating and lighting. For example, in the area of photovoltaics, EERE's systems modeling and analysis activity rigorously assesses the performance, reliability, installed costs, and levelized energy costs (LECs) of a wide variety of flat-plate

  15. Solar Energy - It's Growth, Development, and Use

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

    Solar Energy Resources with Additional Information Solar Energy Courtesy of National Renewable Energy Laboratory Credit-Robb Williamson The Department of Energy has played a major role in solar energy development through previous research and ongoing activities. As a result of research and development, the "cost of solar energy has been reduced 100-fold over the past two decades." 1 Concentrating Solar Power (CSP) systems use reflective materials that concentrate the sun's heat energy

  16. Do-it-yourself guideline for constructing a solar alcohol distillation system

    SciTech Connect

    Kennedy, B.W.

    1982-07-27

    The development and testing of a solar powered distillation system are described. The system consists of a parabolic dish collector, a two axis sun tracking stand, sun tracking solar cell system, condenser, fermentation tanks, and continuous distillation still. The assembly instructions for the parabolic dish are included as well as the basic steps to follow in mashing and fermenting of corn meal. 15 figures. (DMC)

  17. Crop drying by indirect active hybrid solar - Electrical dryer in the eastern Algerian Septentrional Sahara

    SciTech Connect

    Boughali, S.; Bouchekima, B.; Mennouche, D.; Bouguettaia, H.; Bechki, D.; Benmoussa, H.

    2009-12-15

    In the present work, a new specific prototype of an indirect active hybrid solar-electrical dryer for agricultural products was constructed and investigated at LENREZA Laboratory, University of Ouargla (Algerian Sahara). In the new configuration of air drying passage; the study was done in a somewhat high range of mass flow rate between 0.04 and 0.08 kg/m{sup 2} s a range not properly investigated by most researchers. Experimental tests with and without load were performed in winter season in order to study the thermal behavior of the dryer and the effect of high air masse flow on the collector and system drying efficiency. The fraction of electrical and solar energy contribution versus air mass flow rate was investigated. Slice tomato was studied with different temperatures and velocities of drying air in order to study the influence of these parameters on the removal moisture content from the product and on the kinetics drying and also to determine their suitable values. Many different thin layer mathematical drying models were compared according to their coefficient of determination (R{sup 2}) and reduced chi square ({chi}{sup 2}) to estimate experimental drying curves. The Middli model in this condition proved to be the best for predicting drying behavior of tomato slice with (R{sup 2} = 0.9995, {chi}{sup 2} = 0.0001). Finally an economic evaluation was calculated using the criterion of payback period which is found very small 1.27 years compared to the life of the dryer 15 years. (author)

  18. Beyond Pluto: The Search for the Edge of the Solar System

    SciTech Connect

    Funsten, Herb

    2015-08-12

    In July, we finally visited the last major body of our solar system, Pluto. But what lies beyond? The stellar wind from our Sun forms an enormous bubble in interstellar space. This “sphere of our Sun,” or heliosphere, extends far beyond Pluto and forms a protective cocoon that shields us from cosmic radiation. In this talk, we will travel to the edge of the solar system, peer into the structure and dynamics of the outer heliosphere as it interacts with the interstellar medium and anticipate the future of the solar system as it moves through our galactic neighborhood.

  19. COLLOQUIUM: Comets and the Origin and Evolution of the Solar System |

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

    Princeton Plasma Physics Lab June 17, 2015, 4:15pm to 6:30pm Colloquia MBG Auditorium COLLOQUIUM: Comets and the Origin and Evolution of the Solar System Professor David Jewitt University of California - Los Angeles I will give a broad introduction to modern comet science, with a focus on new results and the big picture, relating to the origin and evolution of the solar system. Wednesday Colloquium, June 17, 2015, "Comets & the Origin & Evolution of the Solar System",

  20. Assembly and comparison of available solar hot water system reliability databases and information.

    SciTech Connect

    Menicucci, David F.

    2009-05-01

    Solar hot water (SHW) systems have been installed commercially for over 30 years, yet few quantitative details are known about their reliability. This report describes a comprehensive analysis of all of the known major previous research and data regarding the reliability of SHW systems and components. Some important conclusions emerged. First, based on a detailed inspection of ten-year-old systems in Florida, about half of active systems can be expected to fail within a ten-year period. Second, valves were identified as the probable cause of a majority of active SHW failures. Third, passive integral and thermosiphon SHW systems have much lower failure rates than active ones, probably due to their simple design that employs few mechanical parts. Fourth, it is probable that the existing data about reliability do not reveal the full extent of fielded system failures because most of the data were based on trouble calls. Often an SHW system owner is not aware of a failure because the backup system silently continues to produce hot water. Thus, a repair event may not be generated in a timely manner, if at all. This final report for the project provides all of the pertinent details about this study, including the source of the data, the techniques to assure their quality before analysis, the organization of the data into perhaps the most comprehensive reliability database in existence, a detailed statistical analysis, and a list of recommendations for additional critical work. Important recommendations include the inclusion of an alarm on SHW systems to identify a failed system, the need for a scientifically designed study to collect high-quality reliability data that will lead to design improvements and lower costs, and accelerated testing of components that are identified as highly problematic.

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

    Office of Scientific and Technical Information (OSTI)

    DOE Contract Number: SC0001299; FG02-09ER46577 Resource Type: Journal Article Resource Relation: Journal Name: Solar Energy; Journal Volume: 85; Related Information: S3TEC partners ...

  2. Excise Tax Deduction for Solar or Wind Powered Systems

    Energy.gov [DOE]

    In Massachusetts, businesses may deduct from net income, for state excise tax purposes, expenditures paid or incurred from the installation of any "solar or wind powered climatic control unit and...

  3. Integrated Solar Thermochemical Reaction System for High Efficiency...

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

    This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 23-25, 2013 near Phoenix, Arizona. cspreviewmeeting042313wegeng.p...

  4. Solar energy system performance evaluation - final report for Honeywell OTS 45, Salt River Project, Phoenix, Arizona

    SciTech Connect

    Mathur, A K

    1983-09-01

    This report describes the operation and technical performance of the Solar Operational Test Site (OTS 45) at Salt River Project in Phoenix, Arizona, based on the analysis of data collected between April 1981 and March 31, 1982. The following topics are discussed: system description, performance assessment, operating energy, energy savings, system maintenance, and conclusions. The solar energy system at OTS 45 is a hydronic heating and cooling system consisting of 8208 square feet of liquid-cooled flat-plate collectors; a 2500-gallon thermal storage tank; two 25-ton capacity organic Rankine-cycle-engine-assisted water chillers; a forced-draft cooling tower; and associated piping, pumps, valves, controls and heat rejection equipment. The solar system has eight basic modes of operation and several combination modes. The system operation is controlled automatically by a Honeywell-designed microprocessor-based control system, which also provides diagnostics. Based on the instrumented test data monitored and collected during the 8 months of the Operational Test Period, the solar system collected 1143 MMBtu of thermal energy of the total incident solar energy of 3440 MMBtu and provided 241 MMBtu for cooling and 64 MMBtu for heating. The projected net annual electrical energy savings due to the solar system was approximately 40,000 kWh(e).

  5. Solar System Gamma Ray observations using Fermi-LAT detector

    SciTech Connect

    Giglietto, N.

    2009-04-08

    The Fermi Gamma-ray Space Telescope, launched in June 2008, is an international space mission dedicated to the study of the high-energy gamma rays from the Universe. The main instrument aboard Fermi is the Large Area Telescope (LAT), a pair conversion telescope equipped with the state-of-the art in gamma-ray detectors technology, and operating at energies >30 MeV. During first two months of data taking, Fermi has detected high-energy gamma rays from the quiet Sun and the Moon. This emission is produced by interactions of cosmic rays; by nucleons with the solar and lunar surface, and electrons with solar photons in the heliosphere. While the Moon was detected by EGRET on CGRO with low statistics, Fermi provides high-sensitivity measurements on a daily basis allowing both short- and long-term variability to be studied. Since Galactic cosmic rays are at their maximum flux at solar minimum we expect that the quiescent solar and lunar emission to be a maximum during the period covered by this report. Fermi is the only mission capable of monitoring the Sun at energies above several hundred MeV over the full 24th solar cycle. We present first analysis showing images of Moon and the quiet emission of the solar disk, giving a description of the analysis tools used.

  6. Employment impacts of selected solar and conventional energy systems: a framework for comparisons and preliminary findings

    SciTech Connect

    Smeltzer, K.K.

    1980-01-01

    Preliminary comprehensive analyses of quantitative and qualitative employment effects of selected solar and conventional energy systems are presented. It proposes a framework for analyzing the direct, indirect, induced, displacement, disposable income, and qualitative employment effects of alternative energy systems. The analyses examine current research findings on these effects for a variety of solar and conventional energy sources and compare expected employment impacts. In general, solar energy systems have higher direct and indirect employment requirements than do conventional energy systems. In addition, employment displaced from conventional sources and employment effects due to changes in consumers' disposable income are highly significant variables in net employment comparisons. Analyses of the size and location of projected energy developments suggest that dispersed solar energy systems have a more beneficial impact on host communities than do large conventional facilities, regardless of the relative magnitude of employment per unit of energy output.

  7. Emission measure distribution for diffuse regions in solar active regions

    SciTech Connect

    Subramanian, Srividya; Tripathi, Durgesh; Klimchuk, James A.; Mason, Helen E.

    2014-11-01

    Our knowledge of the diffuse emission that encompasses active regions is very limited. In this paper we investigate two off-limb active regions, namely, AR 10939 and AR 10961, to probe the underlying heating mechanisms. For this purpose, we have used spectral observations from Hinode/EIS and employed the emission measure (EM) technique to obtain the thermal structure of these diffuse regions. Our results show that the characteristic EM distributions of the diffuse emission regions peak at log T = 6.25 and the coolward slopes are in the range 1.4-3.3. This suggests that both low- as well as high-frequency nanoflare heating events are at work. Our results provide additional constraints on the properties of these diffuse emission regions and their contribution to the background/foreground when active region cores are observed on-disk.

  8. Solar Resource Assessment

    Office of Energy Efficiency and Renewable Energy (EERE)

    DOE solar resource research focuses on understanding historical solar resource patterns and making future predictions, both of which are needed to support reliable power system operation. As solar...

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

    SciTech Connect

    Thomas, W.C.

    1985-02-01

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

  10. Solar interior and atmosphere

    SciTech Connect

    Cox, A.N.; Livingston, W.C.; Matthews, M.S. National Solar Observatory, Tucson, AZ )

    1991-01-01

    The present work discusses nuclear energy generation in the solar interior, solar neutrino experiments, solar premain-sequence evolution, the computation of standard solar models, radiative-zone mixing, solar element separation by atomic diffusion, the observation and theory of solar oscillations, the solar internal rotation and magnetism implications of oscillations, solar gravity modes, and solar oscillation-mode excitation. Also discussed are the solar spectrum, the role of the solar photosphere and a radiative boundary, high spatial-resolution techniques for solar study, high-resolution observations of the solar granulation, large-scale velocity fields, the solar activity cycle, the magnetic fields of active regions and sunspots, the physics of flux tubes and filigrees, the heating of the solar chromosphere, the fine structure of the solar transition region, coronal activity, the coronal origins of the solar winds, and postmain sequence solar evolution.

  11. Enhanced photocurrent density in graphene/Si based solar cell (GSSC) by optimizing active layer thickness

    SciTech Connect

    Rosikhin, Ahmad Hidayat, Aulia Fikri; Syuhada, Ibnu; Winata, Toto

    2015-12-29

    Thickness dependent photocurrent density in active layer of graphene/Si based solar cell has been investigated via analytical – simulation study. This report is a preliminary comparison of experimental and analytical investigation of graphene/Si based solar cell. Graphene sheet was interfaced with Si thin film forming heterojunction solar cell that was treated as a device model for photocurrent generator. Such current can be enhanced by optimizing active layer thickness and involving metal oxide as supporting layer to shift photons absorption. In this case there are two type of devices model with and without TiO{sub 2} in which the silicon thickness varied at 20 – 100 nm. All of them have examined and also compared with each other to obtain an optimum value. From this calculation it found that generated currents almost linear with thickness but there are saturated conditions that no more enhancements will be achieved. Furthermore TiO{sub 2} layer is effectively increases photon absorption but reducing device stability, maximum current is fluctuates enough. This may caused by the disturbance of excitons diffusion and resistivity inside each layer. Finally by controlling active layer thickness, it is quite useful to estimate optimization in order to develop the next solar cell devices.

  12. Solar Equipment Certification | Department of Energy

    Energy.gov [DOE] (indexed site)

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

  13. Solar Thermochemical Advanced Reactor System, Wins R&D 100 Award

    Energy.gov [DOE]

    Solar Thermochemical Advanced Reactor System, or STARS, converts natural gas and sunlight into a more energy-rich fuel called syngas, which power plants can burn to make electricity.

  14. Solar energy system performance evaluation seasonal report for Elcam San Diego, San Diego, California

    SciTech Connect

    Not Available

    1980-05-01

    The solar energy system, Elcam San Diego, was designed to supply domestic hot water heating for a single family residence located in Encinitas, California. The contents of this document have been divided into System Description, Performance Assessment, Operating Energy, Energy Savings, Maintenance and Summary and Conclusions. The system is a Sunspot two tank cascade type, where solar energy is supplied to either a 66 gallon preheat tank (solar storage) or a 40 gallon domestic hot water tank. Water is pumped directly from one of the two tanks, through the 65 square feet collector array and back into the same tank. Freeze protection is provided by automatically circulating hot water from the hot water tank through the collectors and exposed plumbing when freezing conditions exist. Auxiliary energy is supplied by natural gas. The Elcam San Diego solar energy system has three modes of operation.

  15. At Solar System's Edge, There be...Bubbles? - NERSC Science News...

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

    are affected by material expelled from other stars in our corner of the Milky Way galaxy. Data sent from the Voyager spacecraft as they exit our solar system is informing new...

  16. 3S Industries AG Formerly 3S Swiss Solar Systems AG | Open Energy...

    OpenEI (Open Energy Information) [EERE & EIA]

    search Name: 3S Industries AG (Formerly 3S Swiss Solar Systems AG) Place: Bern, Switzerland Zip: CH-3006 Product: Swiss-based manufacturer of manual and semi-automatic PV...

  17. Control system analysis for off-peak auxiliary heating of passive solar systems

    SciTech Connect

    Murray, H.S.; Melsa, J.L.; Balcomb, J.D.

    1980-01-01

    A computer simulation method is presented for the design of an electrical auxiliary energy system for passive solar heated structures. The system consists of electrical mats buried in the ground underneath the structure. Energy is stored in the ground during utility off-peak hours and released passively to the heated enclosure. An optimal control strategy is used to determine the system design parameters of depth of mat placement and minimum instaled electrical heating capacity. The optimal control applies combinations of fixed duration energy pulses to the heater, which minimize the room temperature error-squared for each day, assuming advance knowledge of the day's weather. Various realizable control schemes are investigated in an attempt to find a system that approaches the performance of the optimal control system.

  18. Extraterrestrial Materials: The Role of Synchrotron Radiation Analyses in the Study of Our Solar System

    ScienceCinema

    Sutton, Stephen R. [University of Chicago, Chicago, Illinois, United States

    2016-07-12

    Sample-return missions and natural collection processes have provided us with a surprisingly extensive collection of matter from Solar System bodies other than the Earth. These collections include samples from the Moon, Mars, asteroids, interplanetary dust, and, recently, from the Sun (solar wind) and a comet. This presentation will describe some of these materials, how they were collected, and what we have learned from them. Synchrotron radiation analyses of these materials are playing an increasingly valuable role in unraveling the histories and properities of the parent Solar System bodies.

  19. Multi-criteria analysis on how to select solar radiation hydrogen production system

    SciTech Connect

    Badea, G.; Naghiu, G. S. Felseghi, R.-A.; Giurca, I.; Răboacă, S.; Aşchilean, I.

    2015-12-23

    The purpose of this article is to present a method of selecting hydrogen-production systems using the electric power obtained in photovoltaic systems, and as a selecting method, we suggest the use of the Advanced Multi-Criteria Analysis based on the FRISCO formula. According to the case study on how to select the solar radiation hydrogen production system, the most convenient alternative is the alternative A4, namely the technical solution involving a hydrogen production system based on the electrolysis of water vapor obtained with concentrated solar thermal systems and electrical power obtained using concentrating photovoltaic systems.

  20. Beyond Pluto: The Search for the Edge of the Solar System focus of upcoming

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

    Frontiers in Science lectures Frontiers in Science lectures Beyond Pluto: The Search for the Edge of the Solar System focus of upcoming Frontiers in Science lectures Herb Funsten will explore the edge of the solar system and anticipate its future as it moves through our galactic neighborhood. July 30, 2015 IBEX spacecraft. Photo courtesy of NASA IBEX spacecraft. Photo courtesy of NASA Contact Los Alamos National Laboratory Steve Sandoval Communications Office (505) 665-9206 Email "In

  1. Impact of Improved Solar Forecasts on Bulk Power System Operations in ISO-NE (Presentation)

    SciTech Connect

    Brancucci Martinez-Anido, C.; Florita, A.; Hodge, B.M.

    2014-11-01

    The diurnal nature of solar power is made uncertain by variable cloud cover and the influence of atmospheric conditions on irradiance scattering processes. Its forecasting has become increasingly important to the unit commitment and dispatch process for efficient scheduling of generators in power system operations. This presentation is an overview of a study that examines the value of improved solar forecasts on Bulk Power System Operations.

  2. Solar Rights

    Energy.gov [DOE]

    A solar energy system is defined as "a system affixed to a building or buildings that uses solar devices, which are thermally isolated from living space or any other area where the energy is used...

  3. Site selection for concentrated solar thermal systems in Hawaii

    SciTech Connect

    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.

  4. System and method for aligning heliostats of a solar power tower

    DOEpatents

    Convery, Mark R.

    2013-01-01

    Disclosed is a solar power tower heliostat alignment system and method that includes a solar power tower with a focal area, a plurality of heliostats that each reflect sunlight towards the focal area of the solar power tower, an off-focal area location substantially close to the focal area of the solar power tower, a communication link between the off-focal area location and a misaligned heliostat, and a processor that interprets the communication between the off-focal area location and the misaligned heliostat to identify the misaligned heliostat from the plurality of heliostats and that determines a correction for the identified misaligned heliostat to realign the misaligned heliostat to reflect sunlight towards the focal area of the solar power tower.

  5. Solar receiver heliostat reflector having a linear drive and position information system

    DOEpatents

    Horton, Richard H.

    1980-01-01

    A heliostat for a solar receiver system comprises an improved drive and control system for the heliostat reflector assembly. The heliostat reflector assembly is controllably driven in a predetermined way by a light-weight drive system so as to be angularly adjustable in both elevation and azimuth to track the sun and efficiently continuously reflect the sun's rays to a focal zone, i.e., heat receiver, which forms part of a solar energy utilization system, such as a solar energy fueled electrical power generation system. The improved drive system includes linear stepping motors which comprise low weight, low cost, electronic pulse driven components. One embodiment comprises linear stepping motors controlled by a programmed, electronic microprocessor. Another embodiment comprises a tape driven system controlled by a position control magnetic tape.

  6. Fact Sheet: Best Practices Handbook for the Collection and Use of Solar Energy Applications; Best Practices Handbook for the Collection and Use of Solar Energy Applications (Fact Sheet), Energy Systems Integration (ESI), NREL (National Renewable Energy Laboratory)

    SciTech Connect

    2015-06-01

    This fact sheet presents highlights from the Best Practices Handbook for the Collection and Use of Solar Resource Data for Solar Energy Applications, which provides detailed information about solar resource data and the resulting data products needed for planning each stage of large concentrating solar power systems, from initial site selection to system operations.

  7. Cycle Evaluations of Reversible Chemical Reactions for Solar Thermochemical Energy Storage in Support of Concentrating Solar Power Generation Systems

    SciTech Connect

    Krishnan, Shankar; Palo, Daniel R.; Wegeng, Robert S.

    2010-07-25

    The production and storage of thermochemical energy is a possible route to increase capacity factors and reduce the Levelized Cost of Electricity from concentrated solar power generation systems. In this paper, we present the results of cycle evaluations for various thermochemical cycles, including a well-documented ammonia closed-cycle along with open- and closed-cycle versions of hydrocarbon chemical reactions. Among the available reversible hydrocarbon chemical reactions, catalytic reforming-methanation cycles are considered; specifically, various methane-steam reforming cycles are compared to the ammonia cycle. In some cases, the production of an intermediate chemical, methanol, is also included with some benefit being realized. The best case, based on overall power generation efficiency and overall plant capacity factor, was found to be an open cycle including methane-steam reforming, using concentrated solar energy to increase the chemical energy content of the reacting stream, followed by combustion to generate heat for the heat engine.

  8. Solar particle induced upsets in the TDRS-1 attitude control system RAM during the October 1989 solar particle events

    SciTech Connect

    Croley, D.R.; Garrett, H.B.; Murphy, G.B.; Garrard, T.L.

    1995-10-01

    The three large solar particle events, beginning on October 19, 1989 and lasting approximately six days, were characterized by high fluences of solar protons and heavy ions at 1 AU. During these events, an abnormally large number of upsets (243) were observed in the random access memory of the attitude control system (ACS) control processing electronics (CPE) on-board the geosynchronous TDRS-1 (Telemetry and Data Relay Satellite). The RAM unit affected was composed of eight Fairchild 93L422 memory chips. The Galileo spacecraft, launched on October 18, 1989 (one day prior to the solar particle events) observed the fluxes of heavy ions experienced by TDRS-1. Two solid-state detector telescopes on-board Galileo, designed to measure heavy ion species and energy, were turned on during time periods within each of the three separate events. The heavy ion data have been modeled and the time history of the events reconstructed to estimate heavy ion fluences. These fluences were converted to effective LET spectra after transport through the estimated shielding distribution around the TDRS-1 ACS system. The number of single event upsets (SEU) expected was calculated by integrating the measured cross section for the Fairchild 93L422 memory chip with average effective LET spectrum. The expected number of heavy ion induced SEU`s calculated was 176. GOES-7 proton data, observed during the solar particle events, were used to estimate the number of proton-induced SEU`s by integrating the proton fluence spectrum incident on the memory chips, with the two-parameter Bendel cross section for proton SEU`s. The proton fluence spectrum at the device level was gotten by transporting the protons through the estimated shielding distribution. The number of calculated proton-induced SEU`s was 72, yielding a total of 248 predicted SEU`s, very close to the 243 observed SEU`s.

  9. Linear Concentrator System Basics for Concentrating Solar Power

    Office of Energy Efficiency and Renewable Energy (EERE)

    Linear concentrating solar power (CSP) collectors capture the sun's energy with large mirrors that reflect and focus the sunlight onto a linear receiver tube. The receiver contains a fluid that is heated by the sunlight and then used to heat a traditional power cycle that spins a turbine that drives a generator to produce electricity.

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

    SciTech Connect

    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.

  11. Increasing Community Access to Solar: Designing and Developing a Shared Solar Photovoltaic System (Fact Sheet), U.S. Department of Energy (DOE)

    Office of Energy Efficiency and Renewable Energy (EERE)

    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.

  12. THE CLOSEST KNOWN FLYBY OF A STAR TO THE SOLAR SYSTEM

    SciTech Connect

    Mamajek, Eric E.; Barenfeld, Scott A.; Ivanov, Valentin D.; Boffin, Henri M. J.; Kniazev, Alexei Y.; Visnen, Petri; Beletsky, Yuri

    2015-02-10

    Passing stars can perturb the Oort Cloud, triggering comet showers and potentially extinction events on Earth. We combine velocity measurements for the recently discovered, nearby, low-mass binary system WISE J072003.20-084651.2 (Scholzs star) to calculate its past trajectory. Integrating the Galactic orbits of this ?0.15 M{sub ?} binary system and the Sun, we find that the binary passed within only 52{sup +23}{sub ?14} kAU (0.25{sup +0.11}{sub ?0.07} pc) of the Sun 70{sup +15}{sub ?10} kya (1? uncertainties), i.e., within the outer Oort Cloud. This is the closest known encounter of a star to our solar system with a well-constrained distance and velocity. Previous work suggests that flybys within 0.25 pc occur infrequently (?0.1 Myr{sup ?1}). We show that given the low mass and high velocity of the binary system, the encounter was dynamically weak. Using the best available astrometry, our simulations suggest that the probability that the star penetrated the outer Oort Cloud is ?98%, but the probability of penetrating the dynamically active inner Oort Cloud (<20 kAU) is ?10{sup ?4}. While the flyby of this system likely caused negligible impact on the flux of long-period comets, the recent discovery of this binary highlights that dynamically important Oort Cloud perturbers may be lurking among nearby stars.

  13. Solar concentrator with integrated tracking and light delivery system with summation

    DOEpatents

    Maxey, Lonnie Curt

    2015-05-05

    A solar light distribution system includes a solar light concentrator that is affixed externally to a light transfer tube. Solar light waves are processed by the concentrator into a collimated beam of light, which is then transferred through a light receiving port and into the light transfer tube. A reflector redirects the collimated beam of light through the tube to a light distribution port. The interior surface of the light transfer tube is highly reflective so that the light transfers through the tube with minimal losses. An interchangeable luminaire is attached to the light distribution port and provides light inside of a structure. A sun tracking device rotates the concentrator and the light transfer tube to optimize the receiving of solar light by the concentrator throughout the day. The system provides interior lighting that uses only renewable energy sources, and releases no carbon dioxide emissions into the atmosphere.

  14. Solar concentrator with integrated tracking and light delivery system with collimation

    DOEpatents

    Maxey, Lonnie Curt

    2015-06-09

    A solar light distribution system includes a solar light concentrator that is affixed externally to a light transfer tube. Solar light waves are processed by the concentrator into a collimated beam of light, which is then transferred through a light receiving port and into the light transfer tube. A reflector directs the collimated beam of light through the tube to a light distribution port. The interior surface of the light transfer tube is highly reflective so that the light transfers through the tube with minimal losses. An interchangeable luminaire is attached to the light distribution port and distributes light inside of a structure. A sun tracking device rotates the concentrator and the light transfer tube to optimize the receiving of solar light by the concentrator throughout the day. The system provides interior lighting, uses only renewable energy sources, and releases no carbon dioxide emissions into the atmosphere.

  15. Research and Development for Novel Thermal Energy Storage Systems (TES) for Concentrating Solar Power (CSP)

    SciTech Connect

    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.

  16. Real time intelligent process control system for thin film solar cell manufacturing

    SciTech Connect

    George Atanasoff

    2010-10-29

    This project addresses the problem of lower solar conversion efficiency and waste in the typical solar cell manufacturing process. The work from the proposed development will lead toward developing a system which should be able to increase solar panel conversion efficiency by an additional 12-15% resulting in lower cost panels, increased solar technology adoption, reduced carbon emissions and reduced dependency on foreign oil. All solar cell manufacturing processes today suffer from manufacturing inefficiencies that currently lead to lower product quality and lower conversion efficiency, increased product cost and greater material and energy consumption. This results in slower solar energy adoption and extends the time solar cells will reach grid parity with traditional energy sources. The thin film solar panel manufacturers struggle on a daily basis with the problem of thin film thickness non-uniformity and other parameters variances over the deposited substrates, which significantly degrade their manufacturing yield and quality. Optical monitoring of the thin films during the process of the film deposition is widely perceived as a necessary step towards resolving the non-uniformity and non-homogeneity problem. In order to enable the development of an optical control system for solar cell manufacturing, a new type of low cost optical sensor is needed, able to acquire local information about the panel under deposition and measure its local characteristics, including the light scattering in very close proximity to the surface of the film. This information cannot be obtained by monitoring from outside the deposition chamber (as traditional monitoring systems do) due to the significant signal attenuation and loss of its scattering component before the reflected beam reaches the detector. In addition, it would be too costly to install traditional external in-situ monitoring systems to perform any real-time monitoring over large solar panels, since it would require

  17. MAGNETIC NONPOTENTIALITY IN PHOTOSPHERIC ACTIVE REGIONS AS A PREDICTOR OF SOLAR FLARES

    SciTech Connect

    Yang Xiao; Lin Ganghua; Zhang Hongqi; Mao Xinjie

    2013-09-10

    Based on several magnetic nonpotentiality parameters obtained from the vector photospheric active region magnetograms obtained with the Solar Magnetic Field Telescope at the Huairou Solar Observing Station over two solar cycles, a machine learning model has been constructed to predict the occurrence of flares in the corresponding active region within a certain time window. The Support Vector Classifier, a widely used general classifier, is applied to build and test the prediction models. Several classical verification measures are adopted to assess the quality of the predictions. We investigate different flare levels within various time windows, and thus it is possible to estimate the rough classes and erupting times of flares for particular active regions. Several combinations of predictors have been tested in the experiments. The True Skill Statistics are higher than 0.36 in 97% of cases and the Heidke Skill Scores range from 0.23 to 0.48. The predictors derived from longitudinal magnetic fields do perform well, however, they are less sensitive in predicting large flares. Employing the nonpotentiality predictors from vector fields improves the performance of predicting large flares of magnitude {>=}M5.0 and {>=}X1.0.

  18. NEW VACUUM SOLAR TELESCOPE OBSERVATIONS OF A FLUX ROPE TRACKED BY A FILAMENT ACTIVATION

    SciTech Connect

    Yang, Shuhong; Zhang, Jun; Liu, Zhong; Xiang, Yongyuan E-mail: zjun@nao.cas.cn

    2014-04-01

    One main goal of the New Vacuum Solar Telescope (NVST) which is located at the Fuxian Solar Observatory is to image the Sun at high resolution. Based on the high spatial and temporal resolution NVST H? data and combined with the simultaneous observations from the Solar Dynamics Observatory for the first time, we investigate a flux rope tracked by filament activation. The filament material is initially located at one end of the flux rope and fills in a section of the rope; the filament is then activated by magnetic field cancellation. The activated filament rises and flows along helical threads, tracking the twisted flux rope structure. The length of the flux rope is about 75Mm, the average width of its individual threads is 1.11Mm, and the estimated twist is 1?. The flux rope appears as a dark structure in H? images, a partial dark and partial bright structure in 304 , and as a bright structure in 171 and 131 images. During this process, the overlying coronal loops are quite steady since the filament is confined within the flux rope and does not erupt successfully. It seems that, for the event in this study, the filament is located and confined within the flux rope threads, instead of being suspended in the dips of twisted magnetic flux.

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

    SciTech Connect

    Not Available

    1986-01-01

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

  20. Monitoring solar magnetic disturbances in power systems; A summary

    SciTech Connect

    Fagnan, D.R. ); Gattens, P.R.; Johnson, F.D. )

    1990-11-01

    This paper discusses how concerted efforts to monitor the effects of solar magnetic disturbances (SMD) in the United States began anew after the March 13, 1989, disturbance. Previous efforts to monitor SMD were undertaken in the early 1970s. This earlier program monitored 64 different locations throughout the continental United States during the period from March 1969 to September 1972. This work was done during sunspot cycle 21 involving monitoring, effects, and mitigation of geomagnetically induced currents (GIC).

  1. Solar resources

    SciTech Connect

    Hulstrom, R.L.

    1989-01-01

    Following the 1973 oil embargo, the US government initiated a program to develop and use solar energy. This led to individual programs devoted to developing various solar radiation energy conversion technologies: photovoltaic and solar-thermal conversion devices. Nearly concurrently, it was recognized that understanding the available insolation resources was required to develop and deploy solar energy devices and systems. It was also recognized that the insolation information available at that time (1973) was not adequate to meet the specific needs of the solar energy community. Federal efforts were initiated and conducted to produce new and more extensive information and data. The primary federal agencies that undertook such efforts were the Department of Energy (DOE) and the National Oceanic and Atmospheric Administration (NOAA). NOAA's efforts included activities performed by the National Weather Service (NWS) and the National Climatic Data Center (NCDC). This book has two man objectives: to report some of the insolation energy data, information, and products produced by the federal efforts and to describe how they were produced. Products include data bases, models and algorithms, monitoring networks, instrumentation, and scientific techniques. The scope of products and results does not include all those produced by past federal efforts. The book's scope and subject matter are oriented to support the intent and purpose of the other volumes in this series. In some cases, other pertinent material is presented to provide a more complete coverage of a given subject. 385 refs., 149 figs., 50 tabs.

  2. Proposed guidelines for reporting performance of a solar dish/Stirling electric generation system

    SciTech Connect

    Stine, W.B.; Powell, M.A.

    1992-12-31

    Experimental performance data from dish/Stirling system testing can be analyzed to generate a system performance model. An approach to developing an experimentally based performance model of a dish/Stirling system is given. Two methods for analyzing the experimental data are described. To provide information that will permit comparison of dish/Stirling systems, it is necessary to define many of the details involved in calculating system performance data such as the net system output and system solar-to-electric efficiency. This paper describes a set of guidelines for these calculations, based on past experience, especially with the Vanguard dish/Stirling system. Also presented are a set of rating conditions at which a maximum value for system efficiency can be calculated. Comparison between systems of their rated peak solar-to-electric efficiency is made possible when these rating conditions are in common use by manufacturers and testing agencies.

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

    SciTech Connect

    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.

  4. System requirements specification for a solar central receiver system integrated with a cogeneration facility for copper smelting. Final report

    SciTech Connect

    Not Available

    1981-08-01

    This specification defines the characteristics, design and environmental requirements, and economic data for a solar central receiver system integrated with a cogeneration facility for copper smelting. The added solar capacity will supply process heat to an existing copper smelting flash furnace of Finnish design as well as providing for the cogeneration of electricity by an added gas turbine system. Heat storage to accommodate periods of low solar insolation is accomplished by the innovative utilization of copper slag in a thermal energy storage system. This specification is limited (1) to those portions of the plant to be added or modified in order to accomplish the proposed solar retrofit, and (2) by the conceptual design nature of the contracted study. Section 1 of this specification describes the proposed modifications to existing site conditions and facilities, and the nomenclature used. Section 2 provides a listing of applicable standards and codes, publications, reference documentation, and regulatory information. Design and performance requirements to be met by this solar cogeneration facility are outlined in Section 3, and the environmental criteria applicable to the plant are addressed in Section 4. The solar cogeneration facility's characteristics and performance data are specified in Section 5, along with the plant cost and economic data. Simulation models are also described. Appendix B presents site facility information; Appendix C covers the determination of the physical and chemical properties of copper smelter slag; Appendix D presents estimating backup sheets.

  5. Concentration solar power optimization system and method of using the same

    DOEpatents

    Andraka, Charles E

    2014-03-18

    A system and method for optimizing at least one mirror of at least one CSP system is provided. The system has a screen for displaying light patterns for reflection by the mirror, a camera for receiving a reflection of the light patterns from the mirror, and a solar characterization tool. The solar characterization tool has a characterizing unit for determining at least one mirror parameter of the mirror based on an initial position of the camera and the screen, and a refinement unit for refining the determined parameter(s) based on an adjusted position of the camera and screen whereby the mirror is characterized. The system may also be provided with a solar alignment tool for comparing at least one mirror parameter of the mirror to a design geometry whereby an alignment error is defined, and at least one alignment unit for adjusting the mirror to reduce the alignment error.

  6. Solar energy system performance evaluation: seasonal report for Solaron-Akron, Akron, Ohio

    SciTech Connect

    Not Available

    1980-05-01

    The long-term field performance of the installed system and technical contributions to the definition of techniques and requirements for solar energy system design are reported. The Solar Energy System was designed by Solaron Corporation, Denver, Colorado, to provide an 1840 square foot floor area with space heating and domestic hot water (DHW) for a dual-level single family residence in Akron, Ohio. The Solar Energy System uses air as the heat transport medium, has a 546 square foot flat plate collector array subsystem, a 270 cubic foot rock thermal storage bin subsystem, a domestic hot water preheat tank, pumps, controls and transport lines. The auxiliary space heating subsystem is an air to liquid heat pump coupled with a 1000 gallon water storage tank. Electricity provides auxiliary energy for both space heating and DHW subsystems.

  7. A new method for predicting the solar heat gain of complex fenestration systems

    SciTech Connect

    Klems, J.H.; Warner, J.L.

    1992-10-01

    A new method of predicting the solar heat gain through complex fenestration systems involving nonspecular layers such as shades or blinds has been examined in a project jointly sponsored by ASHRAE and DOE. In this method, a scanning radiometer is used to measure the bidirectional radiative transmittance and reflectance of each layer of a fenestration system. The properties of systems containing these layers are then built up computationally from the measured layer properties using a transmission/multiple-reflection calculation. The calculation produces the total directional-hemispherical transmittance of the fenestration system and the layer-by-layer absorptances. These properties are in turn combined with layer-specific measurements of the inward-flowing fractions of absorbed solar energy to produce the overall solar heat gain coefficient. This method has been used to determine the solar heat gain coefficient of a double-glazed window with an interior white shade. The resulting solar heat gain coefficient was compared to a direct measurement of the same system using the Mobile Window Thermal Test (MoWiTT) Facility for measuring window energy performance, and the two results agreed. This represents the first in a series of planned validations and applications of the new method.

  8. Solar Rights

    Energy.gov [DOE]

    In the context of this law, a solar energy device is a system "manufactured and sold for the sole purpose of facilitating the collection and beneficial use of solar energy, including passive...

  9. Solar Heat Gain Through Fenestration Systems Containing Shading: Procedures for Estimating Performance from Minimal Data

    SciTech Connect

    Klems, J.H.

    2000-08-01

    The computational methods for calculating the properties of glazing systems containing shading from the properties of their components have been developed, but the measurement standards and property data bases necessary to apply them have not. It is shown that with a drastic simplifying assumption these methods can be used to calculate system solar-optical properties and solar heat gain coefficients for arbitrary glazing systems, while requiring limited data about the shading. Detailed formulas are presented, and performance multipliers are defined for the approximate treatment of simple glazings with shading. As higher accuracy is demanded, the formulas become very complicated.

  10. Solar Energy Education. Renewable energy activities for junior high/middle school science

    SciTech Connect

    Not Available

    1985-01-01

    Some basic topics on the subject of solar energy are outlined in the form of a teaching manual. The manual is geared toward junior high or middle school science students. Topics include solar collectors, solar water heating, solar radiation, insulation, heat storage, and desalination. Instructions for the construction of apparatus to demonstrate the solar energy topics are provided. (BCS)

  11. Solar engineering 1991

    SciTech Connect

    Mancini, T.R. ); Watanabe, K. ); Klett, D.E. )

    1991-01-01

    This book contains paper presented at the second ASME-JSES-JSME international solar energy conference. It is organized under the following headings: Solar ponds, Energy fundamentals in solar systems, General solar energy, Solar powered cars, Distributed receiver components and systems, Central receiver components and systems, Chemical processes and waste destruction, High flux and innovative applications, Solar thermal space propulsion, Solar dynamic power systems, Analysis methods for monitored building use. Photovoltaics, Testing and measurement.

  12. Solar Energy Technologies Program: Concentrating Solar Power

    SciTech Connect

    2009-10-26

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

  13. Statistical study of free magnetic energy and flare productivity of solar active regions

    SciTech Connect

    Su, J. T.; Jing, J.; Wang, S.; Wang, H. M.; Wiegelmann, T.

    2014-06-20

    Photospheric vector magnetograms from the Helioseismic and Magnetic Imager on board the Solar Dynamic Observatory are utilized as the boundary conditions to extrapolate both nonlinear force-free and potential magnetic fields in solar corona. Based on the extrapolations, we are able to determine the free magnetic energy (FME) stored in active regions (ARs). Over 3000 vector magnetograms in 61 ARs were analyzed. We compare FME with the ARs' flare index (FI) and find that there is a weak correlation (<60%) between FME and FI. FME shows slightly improved flare predictability relative to the total unsigned magnetic flux of ARs in the following two aspects: (1) the flare productivity predicted by FME is higher than that predicted by magnetic flux and (2) the correlation between FI and FME is higher than that between FI and magnetic flux. However, this improvement is not significant enough to make a substantial difference in time-accumulated FI, rather than individual flare, predictions.

  14. Examining System-Wide Impacts of Solar PV Control Systems with a Power Hardware-in-the-Loop Platform

    SciTech Connect

    Williams, Tess L.; Fuller, Jason C.; Schneider, Kevin P.; Palmintier, Bryan; Lundstrom, Blake; Chakraborty, Sudipta

    2014-10-11

    High penetration levels of distributed solar PV power generation can lead to adverse power quality impacts such as excessive voltage rise, voltage flicker, and reactive power values that result in unacceptable voltage levels. Advanced inverter control schemes have been proposed that have the potential to mitigate many power quality concerns. However, closed-loop control may lead to unintended behavior in deployed systems as complex interactions can occur between numerous operating devices. In order to enable the study of the performance of advanced control schemes in a detailed distribution system environment, a Hardware-in-the-Loop (HIL) platform has been developed. In the HIL system, GridLAB-D, a distribution system simulation tool, runs in real-time mode at the Pacific Northwest National Laboratory (PNNL) and supplies power system parameters at a point of common coupling to hardware located at the National Renewable Energy Laboratory (NREL). Hardware inverters interact with grid and PV simulators emulating an operational distribution system and power output from the inverters is measured and sent to PNNL to update the real-time distribution system simulation. The platform is described and initial test cases are presented. The platform is used to study the system-wide impacts and the interactions of controls applied to inverters that are integrated into a simulation of the IEEE 8500-node test feeder, with inverters in either constant power factor control or active volt/VAR control. We demonstrate that this HIL platform is well-suited to the study of advanced inverter controls and their impacts on the power quality of a distribution feeder. Additionally, the results from HIL are used to validate GridLAB-D simulations of advanced inverter controls.

  15. Examining System-Wide Impacts of Solar PV Control Systems with a Power Hardware-in-the-Loop Platform

    SciTech Connect

    Williams, Tess L.; Fuller, Jason C.; Schneider, Kevin P.; Palmintier, Bryan; Lundstrom, Blake; Chakraborty, Sudipta

    2014-06-08

    High penetration levels of distributed solar PV power generation can lead to adverse power quality impacts, such as excessive voltage rise, voltage flicker, and reactive power values that result in unacceptable voltage levels. Advanced inverter control schemes have been developed that have the potential to mitigate many power quality concerns. However, local closed-loop control may lead to unintended behavior in deployed systems as complex interactions can occur between numerous operating devices. To enable the study of the performance of advanced control schemes in a detailed distribution system environment, a test platform has been developed that integrates Power Hardware-in-the-Loop (PHIL) with concurrent time-series electric distribution system simulation. In the test platform, GridLAB-D, a distribution system simulation tool, runs a detailed simulation of a distribution feeder in real-time mode at the Pacific Northwest National Laboratory (PNNL) and supplies power system parameters at a point of common coupling. At the National Renewable Energy Laboratory (NREL), a hardware inverter interacts with grid and PV simulators emulating an operational distribution system. Power output from the inverters is measured and sent to PNNL to update the real-time distribution system simulation. The platform is described and initial test cases are presented. The platform is used to study the system-wide impacts and the interactions of inverter control modes—constant power factor and active Volt/VAr control—when integrated into a simulated IEEE 8500-node test feeder. We demonstrate that this platform is well-suited to the study of advanced inverter controls and their impacts on the power quality of a distribution feeder. Additionally, results are used to validate GridLAB-D simulations of advanced inverter controls.

  16. Distributed Solar PV for Electricity System Resiliency: Policy and Regulatory Considerations (Brochure)

    SciTech Connect

    Not Available

    2014-11-01

    Distributed Solar PV systems have the potential of increasing the grid's resiliency to unforeseen events, such as extreme weather events and attacks. This paper presents the role that distributed PV can play in electric grid resiliency, introduces basic system design requirements and options, and discusses the regulatory and policy options for supporting the use of distributed PV for the purpose of increased electricity resiliency.

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

    SciTech Connect

    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.

  18. Energy Systems Integration: NREL + SolarCity and the Hawaiian Electric Companies (Fact Sheet)

    SciTech Connect

    Not Available

    2015-02-01

    This fact sheet describes the collaboration between NREL, SolarCity, and the Hawaiian Electric Companies at the Energy Systems Integration Facility (ESIF) to address the safety, reliability, and stability challenges of interconnecting high penetrations of distributed photovoltaics with the electric power system.

  19. Energy Department Announces New University-Led Projects to Create More Efficient, Lower Cost Concentrating Solar Power Systems

    Energy.gov [DOE]

    As part of the Energy Department’s SunShot Initiative, Secretary Steven Chu announced today new investments to advance innovative concentrating solar power (CSP) system technologies.

  20. Solar Trough Organic Rankine Electricity System (STORES) Stage 1: Power Plant Optimization and Economics; November 2000 -- May 2005

    SciTech Connect

    Prabhu, E.

    2006-03-01

    Report regarding a Stage 1 Study to further develop the concept of the Solar Trough Organic Rankine Cycle Electricity Systems (STORES).