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in subjects: "Applications"

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Validation of a Photovoltaic Module Energy Ratings Procedure at NREL

A procedure was developed to assign energy ratings to a photovoltaic (PV) module for five reference days that represent different climates.

Date: January 1, 2000

Creator: Marion, B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Structure and Effects of Extended Defects in Polycrystalline Si Thin Films

The structure and effects of extended defects in rapid deposited polycrystalline Si thin films were studied using a combination of high-resolution transmission electron microscopy and first-principles total energy calculations.

Date: January 1, 2000

Creator: Yan, Y.; Al-Jassim, M. M.; Wang, T. H. & Ciszek, T. F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A model of the Capital Cost of a natural gas-fired fuel cell based Central Utilities Plant

This model defines the methods used to estimate the cost associated with acquisition and installation of capital equipment of the fuel cell systems defined by the central utility plant model. The capital cost model estimates the cost of acquiring and installing the fuel cell unit, and all auxiliary equipment such as a boiler, air conditioning, hot water storage, and pumps. The model provides a means to adjust initial cost estimates to consider learning associated with the projected level of pro… more

Date: June 30, 1993

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Economic feasibility analysis of distributed electric power generation based upon the natural gas-fired fuel cell. Final report

The final report provides a summary of results of the Cost of Ownership Model and the circumstances under which a distributed fuel cell is economically viable. The analysis is based on a series of micro computer models estimate the capital and operations cost of a fuel cell central utility plant configuration. Using a survey of thermal and electrical demand profiles, the study defines a series of energy user classes. The energy user class demand requirements are entered into the central utility… more

Date: March 1994

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Configuration and performance of the indirect-fired fuel cell bottomed turbine cycle

The natural gas, indirect-fired fuel cell bottomed turbine cycle (NG-IFFC) is introduced as a novel power plant system for the distributed power and on-site markets in the 20--200 megawatt (MW) size range. The novel indirect-fired carbonate fuel cell bottomed turbine cycle (NG-IFCFC) power plant system configures the ambient pressure carbonate fuel cell with a gas turbine, air compressor, combustor, and ceramic heat exchanger. Performance calculations from ASPEN simulations present material and… more

Date: December 31, 1993

Creator: Micheli, P. L.; Williams, M. C. & Parsons, E. L. Jr.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fundamental stack and system issues in molten carbonate fuel cell development

Stack research and system issues in molten carbonate fuel cell (MCFC) technology development and commercialization are discussed within context of status of MCFC development and commercialization in US. Status of MCFC development is addressed. Major known fundamental stack research issues remaining for the MCFC technology are identified and discussed. The cathode remains a focal point of performance improvement and cost reduction. The various aspects of MCFC power plant network and systems issu… more

Date: December 31, 1993

Creator: Williams, M. C.; Parsons, E. L. Jr. & Mayfield, M. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A solid oxide fuel cell power system: 1992--1993 field operation

Westinghouse has deployed fully integrated, automatically controlled, packaged solid oxide fuel cell (SOFC) power generation systems in order to obtain useful customer feedback. Recently, Westinghouse has deployed 20 kW class natural gas fueled SOFC generator modules integrated into two 25 kW SOFC systems, the first with The UTILITIES, a Japanese consortium. The UTILITIES 25 kW SOFC system is the focus of this paper. The unit was shipped to the Rokko Island Test Center for Advanced Energy Syste… more

Date: May 1, 1994

Creator: Veyo, S. E.; Kusunoki, A.; Takeuchi, S.; Kaneko, S. & Yokoyama, H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Solid oxide fuel cells for transportation: A clean, efficient alternative for propulsion

Fuel cells show great promise for providing clean and efficient transportation power. Of the fuel cell propulsion systems under investigation, the solid oxide fuel cell (SOFC) is particularly attractive for heavy duty transportation applications that have a relatively long duty cycle, such as locomotives, trucks, and barges. Advantages of the SOFC include a simple, compact system configuration; inherent fuel flexibility for hydrocarbon and alternative fuels; and minimal water management. The sp… more

Date: April 1, 1993

Creator: Kumar, R.; Krumpelt, M. & Myles, K. M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Test plan/procedure for the DPHV system integration

No Description Available.

Date: October 21, 1994

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Molten carbonate fuel cell product development test

M-C Power Corp. will design, fabricate, install, test, and evaluate a 250 kW Proof-of-Concept MCFC Power Plant. The plant will be located at Kaiser Permanente`s San Diego Medical Center; it will be designed and built by Bechtel Corp. Two 250 keV MCFC stacks will be assembled and tested at M-C Power; one stack will be used to support the San Diego field demonstration. This report outlines 6 tasks: project management/permitting, demonstration design, stack manufacturing, BOP fabrication, site wor… more

Date: November 1, 1993

Creator: Scroppo, J. A.; Camara, E. H. & Figueroa, R. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

Solar Energy Technologies Contributing to a Robust Energy Infrastructure (viewgraphs only)

This paper provides a brief summary of the role that energy efficiency and renewable energy technologies can serve in strengthening our energy infrastructure. These technologies are commercially available today and are already deployed in many thousands of applications.

Date: May 1, 2003

Creator: Thornton, J. P.

Item Type: Presentation

Partner: UNT Libraries Government Documents Department

open access

Superlattices in thermoelectric applications

The electrical conductivity, thermopower and the electronic contribution to the thermal conductivity of a superlattice, are calculated with the electric field and the thermal gradient applied parallel to the interfaces. Tunneling between quantum wells is included. The broadening of the lowest subband when the period of the superlattice is decreased produces a reduction of the thermoelectric figure of merit. However, we found that a moderate increase of the figure of merit may be expected for in… more

Date: August 1, 1994

Creator: Sofo, J. O. & Mahan, G. D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Unique Features and Spacecraft Applications of Dynamic Isotope Power Systems

The dynamic isotope power system represents the most recent attempt to develop a heat-engine generator for space electric power. A major objective in this most recent effort was to increase the power and to reduce the cost of nuclear space power systems to the point where the unique features of this power source could be brought to bear for Earth-orbit missions which could benefit therefrom. This objective was largely achieved; both weight and cost of the dynamic isotope systems are comparable … more

Date: January 1, 1982

Creator: Raab, B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

Renewable Energy 101 (Presentation)

Presentation given at the 2012 Department of Homeland Security Renewable Energy Roundtable as an introduction to renewable technologies and applications.

Date: March 1, 2012

Creator: Walker, A.

Item Type: Presentation

Partner: UNT Libraries Government Documents Department

open access

Polymer electrolyte fuel cells: Potential transportation and stationary applications

The application of the polymer electrolyte fuel cell (PEFC) as a primary power source in electric vehicles has received increasing attention during the last few years. This increased attention is the result of a combination of significant technical advances in this fuel cell technology and the initiation of some projects for the demonstration of a complete, PEFC-based power system a bus or in a passenger car. Such demonstration projects reflect an increase in industry`s faith in the potential o… more

Date: April 1, 1993

Creator: Gottesfeld, S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Polymer electrolyte fuel cells for transportation applications

The application of the polymer electrolyte fuel cell (PEFC) as a primary power source in electric vehicles has received incrming attention during the last few years. This increased attention has been fueled by a combination of significant technical advances in this field and by the initiation of some projects for the demonstration of a complete, PEFC-based power system in a bus or in a passenger car. Such demonstration pretieds reflect an increased faith of industry in the potential of this tec… more

Date: March 1, 1993

Creator: Springer, T. E.; Wilson, M. S.; Garzon, F. H.; Zawodzinski, T. A. & Gottesfeld, S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Building construction regulations and the fuel cell: Roadblocks and/or opportunities to technology transfer

A significant amount of effort is underway to develop new technologies for the buildings sector. To be implemented in buildings, however, new technologies must meet a host of codes and standards, many of which vary from state to state. Technology development efforts frequently neglect an analysis of codes and standards until late in the development phase (typically just prior to commercialization) or even worse, not until after commercialization. Because of the time lag in either making necessa… more

Date: August 1, 1994

Creator: Conovere, D. R. & Kinzey, B. R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

BAs-GaAs Semiconductor Alloys as a Photovoltaic Alternative to Nitride Alloys

Nitrogen alloyed III-V semiconductor compounds have been intensely studied in recent years due to unusual effects caused by nitrogen alloying. These effects are exploited in band gap engineering for specific applications such as solar cells and blue lasers.

Date: January 1, 2000

Creator: Hart, G. L. W. & Zunger, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Small-Angle Neutron Scattering Studies of a-Si:H and a-Si:D

The heterogeneity of hydrogen and deuterium on the nanometer scale has been probed by samll-angle neutron scattering (SANS) from a-Si:H and a-Si:D films. Films were depsoited by two techniques, plasma-enhanced chemical vapor deposition (PECVD) and hot-wire chemical vapor deposition (HWCVD) using conditions that yield high quality films and devices.

Date: January 1, 2000

Creator: Williamson, D. L.; Marr, D. W. M.; Nelson, B. P.; Iwaniczko, E.; Yang, J.; Yan, B. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Structural Ordering and its Correlation to the Optoelectronic Properties of a-Si:H Films

Magnetic susceptibility was suggested theoretically to be sensitive to the overall structural order of a-Si:H and is measured precisely for various a-Si:H thin films using a new technique.

Date: January 1, 2000

Creator: Baugh, J.; Han, D.; Kleinhammes, A.; Wang, Q. & Wu, Y.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Procedures at NREL for Evaluating Multijunction Concentrator Cells

The procedures for evaluating the performance of multijunctiion-concentrator cells at the National Renewable Energy Laboratory are described. The accurate measurement of the performance of multijunction cells requires accurate relative-quantum-efficiency-measurements, "matched" reference cells, and a spectrally adjustable solar simulator.

Date: January 1, 2000

Creator: Moriarty, T. & Emery, K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Research Needs of c-Si Technology Required to Meet Roadmap Milestones

In this paper, we examine the areas in c-Si growth, materials, and processing that require improvement through research to overcome barriers to the implementation of the PV Roadmap's Si goals.

Date: January 1, 2000

Creator: Ruby, D. S.; Ciszek, T. & Sopori, B.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Effects of Surface Composition on CdTe/CdS Device Performance

The atomic composition of the back surface of the CdTe layer in a CdTe/CdS photovoltiac (PV) device has a significant influence on the quality of the electrical contact to this layer. This paper reports the results of a systematic study that correlates the composition of the back surface with pre-contact processing and device performance.

Date: January 1, 2000

Creator: Levi, D.; Albin, D. & King, D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Micro-PL Studies of Polycrustalline CdS/CdTe Interfaces

We describe a technique of photoluminescence measurements with a resolutiion of microns. This technique is applied to examine the CdS/CdTe interface of CdTe solar cells.

Date: January 1, 2000

Creator: Dhere, R.; Cheong, M.; Smith, S.; Albin, D.; Mascarenhas, A. & Gessert, T. A.

Item Type: Article

Partner: UNT Libraries Government Documents Department