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PV Technology for Today and Tomorrow

Description: The presentation was given as a webinar to the Solar Instructor Training Network on August 13, 2010. It summarizes the three primary types of photovoltaic technologies, why the three approaches are useful and some advantages and disadvantages of each approach. At the end is an answer to a question that was asked.
Date: August 13, 2010
Creator: Kurtz, S.
Item Type: Refine your search to only Presentation
Partner: UNT Libraries Government Documents Department

Field Test of a DHW Distribution System: Temperature and Flow Analyses

Description: This presentation discusses a field test of a DHW distribution system in an occupied townhome. It includes measured fixture flows and temperatures, a tested recirculation system, evaluated disaggregation of flow by measured temperatures, Aquacraft Trace Wizard analysis, and comparison.
Date: May 13, 2010
Creator: Barley, C. D.; Hendron, B. & Magnusson, L.
Item Type: Refine your search to only Presentation
Partner: UNT Libraries Government Documents Department
open access

Communities of the Future: Energy Programs for Livable Communities

Description: This document relates how several of the US Department of Energy's Office of Energy Efficiency and Renewable Energy (DOE/EERE) programs help communities across the nation deal with the issues of livability and sustainable growth. Highlights include background information on renewable energy technologies, some outstanding program anecdotes, and regional and Internet contact information.
Date: April 13, 1999
Creator: Jones, J. G. & Strawn, N.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

Accelerated Life Testing and Service Lifetime Prediction for PV Technologies in the Twenty-First Century

Description: The purposes of this paper are to (1) discuss the necessity for conducting accelerated life testing (ALT) in the early stages of developing new photovoltaic (PV) technologies, (2) elucidate the crucial importance for combining ALT with real-time testing (RTT) in terrestrial environments for promising PV technologies for the 21st century, and (3) outline the essential steps for making a service lifetime prediction (SLP) for any PV technology. The specific objectives are to (a) illustrate the ess… more
Date: July 13, 1999
Creator: Czanderna, A. W. & Jorgensen, G. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Photocatalytic and Chemical Oxidation of Organic Compounds in Supercritical Carbon Dioxide

Description: Determine if photocatalytic or other clean oxidation chemistry can be applied to the removal of organic or inorganic contaminants that are introduced into supercritical carbon dioxide during its use as an extraction and cleaning medium in DOE environmental and waste minimization applications. The targets are those contaminants left in solution after the bulk of the solutes have been separated from the fluid phase by changing pressure and/or temperature (but not evaporating the CO2). This is app… more
Date: July 13, 1999
Creator: Blake, D. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermophotovoltaic Cell Temperature Measurement Issues

Description: The power produced by photovoltaic devices changes with temperature, ranging from 0.1% to nearly 1% per degrees Celsius depending on the structure. The temperature across the surface of TPV cells will vary depending on the amount of absorbed power. Thus the temperature over a region of a wafer where there is no cell will be different from a region of the wafer containing a cell with an antireflection coating and back surface reflector. Vacuum hold-downs or back surface probes may result in loca… more
Date: November 13, 1998
Creator: Emery, K. & Moriarty, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Phase Separation and Facet Formation during the Growth of (GaAs)1-x(Ge2)x Alloy Layers by Metal Organic Vapour Phase Epitaxy

Description: Metal organic vapour phase epitaxy (GaAs)1-x(Ge2)x alloy layers, 0<x<0.22, were grown at temperatures between 640 and 690 C, on vicinal (001) GaAs substrates. Phase separation occurred in all the layers. The phase-separated microstructure changed with alloy composition, growth temperature, and substrate orientation. In x {approx} 0.1 layers grown at 640 C, Ge segregation occurred on {l_brace}115{r_brace}B planes associated with a {l_brace}115{r_brace}B surface faceting. Increase in growth… more
Date: September 13, 1999
Creator: Norman, A. G.; Olson, J. M.; Geisz, J. F.; Moutinho, H. R.; Mason, A.; Al-Jassim, M. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Market-Driven EFG Modules Final Report: 14 December 1995--30 June 1999

Description: This report describes the progress made in the 3-year program at ASE Americas Inc. in the PVMaT 4A2 Initiative on the development of Edge-Defined Film-Fed Growth (EFG) silicon wafer technology. This program was performed over the period from December 14, 1995 to June 30, 1999. The work focused on advancing EFG manufacturing technology and lowering production costs in three areas: I. EFG Wafers--through better silicon feedstock utilization, improvements in growth, a wafer thickness reduction fro… more
Date: September 13, 1999
Creator: Kardauskas, M. & Kalejs, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Renewable Energy Opportunity Assessment

Description: Presently, the US EPA is constructing a new complex at Research Triangle Park, North Carolina to consolidate its research operations in the Raleigh-Durham area. The National Computer Center (NCC) is currently in the design process and is planned for construction as partof this complex. Implementation of the new technologies can be planned as part of the normal construction process, and full credit for elimination of the conventional technologies can be taken. Several renewable technologies are … more
Date: November 13, 1998
Creator: Hancock, E. & Mas, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Controlled Hydrogen Fleet and Infrastructure Demonstration and Validation Project: Progress Update

Description: Presentation outlining the progress of DOE's Controlled Hydrogen Fleet and Infrastructure Demonstration and Validation Project, prepared for the 2006 National Hydrogen Association Meeting.
Date: March 13, 2006
Creator: Wipke, K.; Welch, C.; Thomas, H.; Sprik, S.; Gronich, S.; J., Garbak. et al.
Item Type: Refine your search to only Presentation
Partner: UNT Libraries Government Documents Department
open access

Determining equivalent damage loading for full-scale wind turbine blade fatigue tests

Description: This paper describes a simplified method for converting wind turbine rotor design loads into equivalent-damage, constant-amplitude loads and load ratios for both flap and lead-lag directions. It is an iterative method that was developed at the National Renewable Energy Laboratory (NREL) using Palmgren-Miner's linear damage principles. The general method is unique because it does not presume that any information about the materials or blade structural properties is precisely known. According to … more
Date: March 13, 2000
Creator: Freebury, G. & Musial, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Light-Duty Alternative Fuel Vehicles: Federal Test Procedure Emissions Results

Description: In support of the U.S. Department of Energy's development and deployment of alternative fuels for environmental and national security reasons, NREL has managed a series of light-duty vehicle emissions tests on alternative fuel vehicles (AFVs). The purpose of this report is to give a detailed evaluation of the final emissions test results on vehicles tested on methanol, ethanol, and compressed natural gas.
Date: December 13, 1999
Creator: Kelly, K.; Eudy, L. & Coburn, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

PV working with industry, Second Quarter, 1999: Shedding light on the matter

Description: NREL PV Working With Industry is a quarterly newsletter devoted to the research, development, and deployment performed by NREL staff in concert with their industry and university partners. The Second Quarter, 1999 issue, titled ''Shedding Light on the Matter,'' focuses on the PV-related research activities of NREL's Basic Sciences Center. The editorialist is Satyen Deb, in his role as Director of the Basic Sciences Center.
Date: September 13, 1999
Creator: Moon, S. & Poole, L.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

Comprehensive testing of Nedwind 12-Meter wind turbine blades at NREL

Description: This paper describes the structural testing of two NedWind 25 12-m blades at the National Renewable Energy Laboratory (NREL). The tests were conducted under the Standards, Measurement and Testing (SMT) Program in conjunction with tests conducted by four European laboratories to develop a common database of blade testing methods. All of the laboratories tested duplicate copies of blades taken from series production. Blade properties, including weight, center of gravity, natural frequencies, stif… more
Date: March 13, 2000
Creator: Larwood, S. & Musial, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Passivation of Interfaces in High-Efficiency Photovoltaic Devices

Description: Solar cells made from III-V materials have achieved efficiencies greater than 30%. Effectively ideal passivation plays an important role in achieving these high efficiencies. Standard modeling techniques are applied to Ga0.5In0.5P solar cells to show the effects of passivation. Accurate knowledge of the absorption coefficient is essential (see appendix). Although ultralow (<2 cm/s) interface recombination velocities have been reported, in practice, it is difficult to achieve such low recombi… more
Date: May 13, 1999
Creator: Kurtz, S. R.; Olson, J. M.; Friedman, D. J.; Geisz, J. F.; Kibbler, A. E. (National Renewable Energy Laboratory) & Bertness, K. A. (NIST, Boulder, Colorado)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Growth of homo-epitaxial silicon at low temperatures using hot wire chemical vapor deposition

Description: The authors report on the first known growth of high-quality epitaxial Si via the hot wire chemical vapor deposition (HWCVD) method. This method yields device-quality epitaxial Si at the comparatively low temperatures of 195 to 450 C, and relatively high growth rates of 3 to 20 {angstrom}/sec. Layers up to 4,500-{angstrom} thick have been grown. These epitaxial layers have been characterized by transmission electron microscopy (TEM), indicating large regions of nearly perfect atomic registratio… more
Date: December 13, 1999
Creator: Thiesen, J.; Jones, K. M.; Matson, R.; Reedy, R.; Crandall, R.; Iwaniczko, E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Energy Efficiency Upgrades for Little Rock Air Force Base

Description: Little Rock Air Force Base (LRAFB), in partnership with the local utility, Entergy Services, Inc., has reduced energy costs and used savings from investments in high-efficiency equipment to maintain and improve the condition of base housing and other facilities. Three projects were completed, with over $10 million invested. Major accomplishments include replacing air-to-air heat pumps with high-efficiency ground-source heat pumps (GSHPs) in more than 1,500 base housing units, lighting modificat… more
Date: November 13, 2000
Creator: Goldman, C. & Dunlap, M.A.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

Energy Savers---Tips on Saving Energy and Money at Home (Fifth Printing)

Description: Provides consumers with home energy and money savings tips such as insulation, weatherization, heating, cooling, water heating, energy efficient windows, landscaping, lighting, and energy efficient appliances.
Date: August 13, 2001
Creator: DOE Office of Building Technology, State and Community Programs
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

A Market Assessment of Residential Grid-Tied PV Systems in Colorado: Executive Summary

Description: This is the Executive Summary of a report that presents research done in response to a decision by the Colorado Governor's Office of Energy Conservation and Management (OEC) and Colorado utility companies to consider making residential grid-tied photovoltaic (PV) systems available in Colorado. The idea was to locate homeowners willing to pay the costs of grid-tied PV (GPV) systems without batteries--$8,000 or $12,000 for a 2- or 3-kilowatt (kW) system, respectively, in 1996. These costs represe… more
Date: September 13, 2000
Creator: Farhar, B. & Coburn, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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