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Tapping into the sun: Today`s applications of photovoltaic technology

Description: Today solar-generated electricity serves people living in the most isolated spots on earth and in the center of our biggest cities. First used in the space program, PV systems are now generating electricity to pump water, light up the night, activate switches, charge batteries, supply the electric utility grid, and more. Whether you are a homeowner, planner, architect, or just someone who pays electric utility bills, photovoltaics may already tough your life in some way.
Date: July 1, 1994
Partner: UNT Libraries Government Documents Department

Outlook for renewable energy technologies: Assessment of international programs and policies

Description: The report presents an evaluation of worldwide research efforts in three specific renewable energy technologies, with a view towards future United States (US) energy security, environmental factors, and industrial competitiveness. The overall energy technology priorities of foreign governments and industry leaders, as well as the motivating factors for these priorities, are identified and evaluated from both technological and policy perspectives. The specific technologies of interest are wind, solar thermal, and solar photovoltaics (PV). These program areas, as well as the overall energy policies of Denmark, France, Germany, Italy, the United Kingdom (UK), Japan, Russia, and the European Community as a whole are described. The present and likely future picture for worldwide technological leadership in these technologies-is portrayed. The report is meant to help in forecasting challenges to US preeminence in the various technology areas, particularly over the next ten years, and to help guide US policy-makers as they try to identify specific actions which would help to retain and/or expand the US leadership position.
Date: February 1, 1995
Creator: Branstetter, L.J.; Vidal, R.C.; Bruch, V.L. & Zurn, R.
Partner: UNT Libraries Government Documents Department

Field experience with a new performance characterization procedure for photovoltaic arrays

Description: As photovoltaic systems become larger and more numerous, improved methods are needed for testing and modeling their performance. Test methods that successfully separate the interacting, time-of-day dependent influences of solar irradiance, operating temperature, solar spectrum, and solar angle-of-incidence have now been developed. These test methods have resulted in a new array performance model that is reasonably simple, yet accurately predicts performance for all operating conditions. This paper describes the new model, outdoor tests required to implement it, results of field tests for five arrays of different technologies, and the evolution of the model into a numerical tool for designing and sizing photovoltaic arrays based on annual energy production.
Date: December 31, 1997
Creator: King, D.L.; Kratochvil, J.A. & Boyson, W.E.
Partner: UNT Libraries Government Documents Department

Basic Research Opportunities in Photovoltaics Workshop: Preprint

Description: Photovoltaic (PV) technology for conversion of sunlight to electricity is the most cost-effective method for meeting the electric power needs of many consumers around the world today. This document is the preface and executive summary from the workshop to be held in May 1999 in Seattle, Washington.
Date: April 1, 1999
Creator: Benner, J.; Deb, S. & McConnell, R. D.
Partner: UNT Libraries Government Documents Department

Manufacturing improvements in the Photovoltaic Manufacturing Technology (PVMaT) Project

Description: The Photovoltaic Manufacturing Technology Project (PVMaT) is a government/industry research and development (R and D) partnership between the US federal government (through the US Department of Energy [DOE]) and members of the US PV industry. The goals of PVMaT are to help the US PV industry improve module manufacturing processes and equipment; accelerate manufacturing cost reductions for PV modules, balance-of-systems components, and integrated systems; increase commercial product performance and reliability; and enhance the investment opportunities for substantial scale-ups of US-based PV manufacturing plant capacities. The approach for PVMaT has been to cost-share risk taking by industry as it explores new manufacturing options and ideas for improved PV modules and other components, advances system and product integration, and develops new system designs, all of which will lead to overall reduced system life-cycle costs for reliable PV end products. The PVMaT Phase 4A module manufac turing R and D projects are just being completed, and initial results for the work directed primarily to module manufacture are reported in this paper. Fourteen new Phase 5A subcontracts have also just been awarded, and planned R and D areas for the ten focused on module manufacture are described. Finally, government funding, subcontractor cost-sharing, and a comparison of the relative efforts by PV technology throughout the PVMaT project are presented.
Date: August 1, 1998
Creator: Witt, C.E.; Mitchell, R.L.; Thomas, H.P.; Symko, M.I.; King, R. & Ruby, D.S.
Partner: UNT Libraries Government Documents Department

CARBON DIOXIDE FIXATION.

Description: Solar carbon dioxide fixation offers the possibility of a renewable source of chemicals and fuels in the future. Its realization rests on future advances in the efficiency of solar energy collection and development of suitable catalysts for CO{sub 2} conversion. Recent achievements in the efficiency of solar energy conversion and in catalysis suggest that this approach holds a great deal of promise for contributing to future needs for fuels and chemicals.
Date: January 12, 2000
Creator: Fujita, E.
Partner: UNT Libraries Government Documents Department

Heat exchanger: ingot casting/slicing process. Silicon sheet growth development for the large area silicon sheet task of the low cost silicon solar array project. First quarterly report, November 20, 1975--December 31, 1975

Description: Designs for changes to the existing crystal casting furnace and multi-wafer slicer were completed prior to the contract. Equipment supplies necessary for the modifications and silicon material were ordered during the first one and one-quarter month period covered. Assembly preparation and check-out of all systems are on schedule. (auth)
Date: December 31, 1975
Creator: Schmid, F.
Partner: UNT Libraries Government Documents Department

Silicon ribbon growth by a capillary action shaping technique. Quarterly technical progress report No. 6

Description: The effects of capillary die design on dopant distribution are described. A new technique for thermal geometry control utilizing inert-gas purging was implemented. Routine 38-mm-wide ribbon growth was demonstrated. 50-mm-wide ribbon growth in a length over one meter was achieved. A technology projection and guide to future silicon sheet growth was completed. (WDM)
Date: December 15, 1976
Creator: Schwuttke, G. H.; Ciszek, T. F. & Kran, A.
Partner: UNT Libraries Government Documents Department

Solar Technology Validation Project - USS Data, LLC: Cooperative Research and Development Final Report, CRADA Number CRD-09-367-04

Description: Under this Agreement, NREL will work with Participant to improve concentrating solar power system performance characterizations. This work includes, but is not limited to, research and development of methods for acquiring renewable resource characterization information using site-specific measurements of solar radiation and meteorological conditions; collecting system performance data; and developing tools for improving the design, installation, operation, and maintenance of solar energy conversion systems. This work will be conducted at NREL and Participant facilities.
Date: August 1, 2013
Creator: Wilcox, S.
Partner: UNT Libraries Government Documents Department

Solar Technology Validation Project - Utah State Energy Program (Met Station): Cooperative Research and Development Final Report, CRADA Number CRD-09-367-09

Description: Under this Agreement, NREL will work with Participant to improve concentrating solar power system performance characterizations. This work includes, but is not limited to, research and development of methods for acquiring renewable resource characterization information using site-specific measurements of solar radiation and meteorological conditions; collecting system performance data; and developing tools for improving the design, installation, operation, and maintenance of solar energy conversion systems. This work will be conducted at NREL and Participant facilities.
Date: August 1, 2013
Creator: Wilcox, S.
Partner: UNT Libraries Government Documents Department

Solar Technology Validation Project - Amonix, Inc.: Cooperative Research and Development Final Report, CRADA Number CRD-09-367-13

Description: Under this Agreement, NREL will work with Participant to improve concentrating solar power system performance characterizations. This work includes, but is not limited to, research and development of methods for acquiring renewable resource characterization information using site-specific measurements of solar radiation and meteorological conditions; collecting system performance data; and developing tools for improving the design, installation, operation, and maintenance of solar energy conversion systems. This work will be conducted at NREL and Participant facilities.
Date: August 1, 2013
Creator: Wilcox, S.
Partner: UNT Libraries Government Documents Department

Solar Technology Validation Project - Iberdrola Renewables, Inc.: Cooperative Research and Development Final Report, CRADA Number CRD-08-298-3

Description: Under this Agreement, NREL will work with Participant to improve concentrating solar power system performance characterizations. This work includes, but is not limited to, research and development of methods for acquiring renewable resource characterization information using site-specific measurements of solar radiation and meteorological conditions; collecting system performance data; and developing tools for improving the design, installation, operation, and maintenance of solar energy conversion systems. This work will be conducted at NREL and Participant facilities.
Date: August 1, 2013
Creator: Wilcox, S.
Partner: UNT Libraries Government Documents Department

Solar Technology Validation Project - Loyola Marymount University: Cooperative Research and Development Final Report, CRADA Number CRD-09-367-03

Description: Under this Agreement, NREL will work with Participant to improve concentrating solar power system performance characterizations. This work includes, but is not limited to, research and development of methods for acquiring renewable resource characterization information using site-specific measurements of solar radiation and meteorological conditions; collecting system performance data; and developing tools for improving the design, installation, operation, and maintenance of solar energy conversion systems. This work will be conducted at NREL and Participant facilities.
Date: August 1, 2013
Creator: Wilcox, S.
Partner: UNT Libraries Government Documents Department

Solar Technology Validation Project - RES Americas: Cooperative Research and Development Final Report, CRADA Number CRD-09-367-11

Description: Under this Agreement, NREL will work with Participant to improve concentrating solar power system performance characterizations. This work includes, but is not limited to, research and development of methods for acquiring renewable resource characterization information using site-specific measurements of solar radiation and meteorological conditions; collecting system performance data; and developing tools for improving the design, installation, operation, and maintenance of solar energy conversion systems. This work will be conducted at NREL and Participant facilities.
Date: August 1, 2013
Creator: Wilcox, S.
Partner: UNT Libraries Government Documents Department

Solar Technology Validation Project - Solargen (Met Station): Cooperative Research and Development Final Report, CRADA Number CRD-09-367-06

Description: Under this Agreement, NREL will work with Participant to improve concentrating solar power system performance characterizations. This work includes, but is not limited to, research and development of methods for acquiring renewable resource characterization information using site-specific measurements of solar radiation and meteorological conditions; collecting system performance data; and developing tools for improving the design, installation, operation, and maintenance of solar energy conversion systems. This work will be conducted at NREL and Participant facilities.
Date: August 1, 2013
Creator: Wilcox, S.
Partner: UNT Libraries Government Documents Department

Solar Technology Validation Project - Southwest Solar (Met Station): Cooperative Research and Development Final Report, CRADA Number CRD-09-367-08

Description: Under this Agreement, NREL will work with Participant to improve concentrating solar power system performance characterizations. This work includes, but is not limited to, research and development of methods for acquiring renewable resource characterization information using site-specific measurements of solar radiation and meteorological conditions; collecting system performance data; and developing tools for improving the design, installation, operation, and maintenance of solar energy conversion systems. This work will be conducted at NREL and Participant facilities.
Date: August 1, 2013
Creator: Wilcox, S.
Partner: UNT Libraries Government Documents Department

Solar Technology Validation Project - Tri-State G&T: Cooperative Research and Development Final Report, CRADA Number CRD-09-367-12

Description: Under this Agreement, NREL will work with Participant to improve concentrating solar power system performance characterizations. This work includes, but is not limited to, research and development of methods for acquiring renewable resource characterization information using site-specific measurements of solar radiation and meteorological conditions; collecting system performance data; and developing tools for improving the design, installation, operation, and maintenance of solar energy conversion systems. This work will be conducted at NREL and Participant facilities.
Date: August 1, 2013
Creator: Wilcox, S.
Partner: UNT Libraries Government Documents Department

Panel results of the solar thermal program research requirement assessment review. Final report

Description: The objectives of the assessment were to identify: research needs by topic and activity, relative priority of research needs, options for performing needed research, potential performers, costs and duration of R and D activities, gaps and duplications within the R and D program, and activities underway that appear to be of low priority. To achieve these objectives, research programs of the Division of Solar Thermal Technologies within the Office of Renewable Energy and Conservation and the Materials and Advanced Energy Programs of the Office of Basic Energy Sciences were reviewed. Several recent assessments of solar thermal research needs made within the past two years by various groups were also reviewed, and the key research issues and needs were extracted. The primary results from the assessment are a set of prioritized activities to meet the most important research needs for solar thermal technologies. These activities belong to four disciplines: materials science, thermal science, thermochemistry, and engineering. Further, priorities associated with the needs for research result from the various activities allow the recommended activities to be grouped into two categories; a core group which should be at the heart of any future program developed by the department, and a set of important needs that should, at least, find their way into a program at some time during its existence. The recommended research program is outlined, and the complete set of ranked research needs is listed.
Date: November 1983
Partner: UNT Libraries Government Documents Department

Renewable energy in Indian country

Description: On June 25--27, 1995, at Mesa Verde National Park in southwestern Colorado, the Center for Resource Management (CRM), organized and sponsored a conference in conjunction with the Navajo Nation, EPA, and Bechtel Group, Inc., to deal with issues associated with developing renewable energy resources on Indian lands. Due to the remoteness of many reservation homes and the cost of traditional power line extensions, a large percentage of the Indian population is today without electricity or other energy services. In addition, while they continue to develop energy resources for export, seeing only minimal gain in their own economies, Indian people are also subject to the health and environmental consequences associated with proximity to traditional energy resource development. Renewable energy technologies, on the other hand, are often ideally suited to decentralized, low-density demand. These technologies--especially solar and wind power--have no adverse health impacts associated with generation, are relatively low cost, and can be used in applications as small as a single home, meeting power needs right at a site. Their minimal impact on the environment make them particularly compatible with American Indian philosophies and lifestyles. Unfortunately, the match between renewable energy and Indian tribes has been hampered by the lack of a comprehensive, coordinated effort to identify renewable energy resources located on Indian lands, to develop practical links between Indian people`s needs and energy producers, and to provide the necessary training for tribal leaders and members to plan, implement, and maintain renewable energy systems. Summaries of the presentations are presented.
Date: December 31, 1995
Partner: UNT Libraries Government Documents Department

Pulse radiolytic studies of electron transfer processes and applications to solar photochemistry. Progress report

Description: The pulse radiolysis technique is applied to the study of electron transfer processes in a variety of chemical systems. Reactive intermediates are produced in solution by electron pulse irradiation and the kinetics of their reactions are followed by time resolved absorption spectrophotometry. Complementary experiments are carried out with excimer laser flash photolysis. These studies are concerned with mechanisms, kinetics, and thermodynamics of reactions of organic and inorganic radicals and unstable oxidation states of metal ions. Reactions are studied in both aqueous and non-aqueous solutions. The studies focus on the unique ability of pulse radiolysis to provide absolute rate constants for reactions of many inorganic radicals and organic peroxyl radicals, species that are key intermediates in many chemical processes. A special concern of this work is the study of electron transfer reactions of metalloporphyrins, which permits evaluation of these molecules as intermediates in solar energy conversion. Metalloporphyrins react with free radicals via electron transfer, involving the ligand or the metal center, or via bonding to the metal, leading to a variety of chemical species whose behavior is also investigated. The highlights of the results during the past three years are summarized below under the following sections: (a) electron transfer reactions of peroxyl radicals, concentrating on the characterization of new peroxyl radicals derived from vinyl, phenyl, other aryl, and pyridyl; (b) solvent effects on electron transfer reactions of inorganic and organic peroxyl radicals, including reactions with porphyrins, and (c) electron transfer and alkylation reactions of metalloporphyrins and other complexes.
Date: February 1, 1995
Creator: Neta, P.
Partner: UNT Libraries Government Documents Department

Photophysics and photoredox processes at polymer-water interfaces. Final technical report

Description: The transduction of light into chemical potential has been actively studies via a variety of mechanisms. Perhaps the most actively pursued approach is via photoredox chemistry. In this project, the authors have used hydrophobic polymer-water interfaces to investigate mechanisms. The paper discusses results on the effect of adsorbing polymers onto latex particles and the use of diblock amphiphilic polymers with interfacial chromophores. It then evaluates the project from the point of view of solar energy conversion.
Date: November 1, 1998
Creator: Webber, S.E.
Partner: UNT Libraries Government Documents Department

Web-dendritic ribbon growth. USC solar report No. Q-3

Description: The web growth investigation portion of this program was spent in growing a backlog of primitive dendrites and developing a number of dendritic seed crystals having a variety of twin plane spacings. These seeds are to be used in the determination of the optimum twin spacing for dendritic-web growth. Having determined the optimum twin spacing for the seed dendrites, the optimized seeds will be used in the experimental part of the investigation to determine the limitation on the growth width and pull rate of the dendritic-web section. Primitive dendrities containing 2,3,4, and 5 twin planes with twin plane spacings of 0.6 to 19.2 mm. have been grown. A supply of dendrite seed crystals have been grown from these primitive dendrites. Computer programs have been developed that appear adequate for the thermal analysis of the dendritic-web growth. A preliminary two dimensional thermal model of the melt, crucible, susceptor and lid has been completed and numerical results obtained. In this model only radiation heat transfer was assumed for the lid. The temperature profiles obtained were thus lower than is found experimentally in the furnace. The characterization experiments have all been tested and found adequate for characterization of the material grown in the dendritic-web furnace.
Date: June 22, 1976
Creator: Hilborn, R. B. Jr. & Faust, J. W. Jr.
Partner: UNT Libraries Government Documents Department