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Title: Optimization study of selective emitter thermophotovoltaic systems

Abstract

At the NASA Lewis Research Center the authors have developed a systems model for a general thermophotovoltaic (TPV) system. The components included in the model are a solar concentrator, receiver, emitter, window, filter and photovoltaic (PV) array. The system model requires the concentrator and receiver efficiencies, the wavelength dependence of the optical properties of the components, together with the emitter temperature, and the PV cell spectral response and current-voltage characteristic. With these inputs, the system efficiency and power output are calculated. For a selective emitter TPV system it is the emitter spectral emittance that is the major determinant of system performance. The selective emitter model is characterized by four distinct emittances: the spectral emittance within a single relatively narrow emission band, much lower emittances on either side of this band, and a long-wavelength-limit emittance. The PV cell model is ideal in that it assumes a quantum efficiency of one. The authors also assume that the selective emitter is perfectly coupled to the PV cell--the photon energy of the radiation leaving the selective emitter is just greater than the bandgap energy of the PV cell, so that the cells will operate with maximum efficiency. In this paper, the authors present resultsmore » of an optimization study of a selective emitter TPV system. They vary the emitter temperature, the spectral emittances and emission bandwidth of the emitter, the PV cell bandgap energy, the cell back-surface reflectivity, and the long-wavelength emission band limit of the emitter, and discuss the effects that the variation of each of these parameters has on system performance.« less

Authors:
;  [1];  [2]
  1. National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
  2. Essential Research, Inc., Cleveland, OH (United States)
Publication Date:
OSTI Identifier:
435554
Report Number(s):
CONF-960805-
TRN: IM9710%%212
Resource Type:
Conference
Resource Relation:
Conference: 31. intersociety energy conversion engineering conference, Washington, DC (United States), 9-14 Aug 1996; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the 31. intersociety energy conversion engineering conference. Volume 2: Conversion technologies, electro-chemical technologies, Stirling engines, thermal management; Chetty, P.R.K.; Jackson, W.D.; Dicks, E.B. [eds.]; PB: 867 p.
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; THERMOPHOTOVOLTAIC CONVERTERS; PHOTON EMISSION; DESIGN; PHOTOVOLTAIC CELLS; SOLAR CONCENTRATORS; ENERGY EFFICIENCY; PERFORMANCE; ENERGY GAP; PARAMETRIC ANALYSIS; SOLAR RECEIVERS

Citation Formats

Good, B S, Chubb, D L, and Lowe, R A. Optimization study of selective emitter thermophotovoltaic systems. United States: N. p., 1996. Web.
Good, B S, Chubb, D L, & Lowe, R A. Optimization study of selective emitter thermophotovoltaic systems. United States.
Good, B S, Chubb, D L, and Lowe, R A. Tue . "Optimization study of selective emitter thermophotovoltaic systems". United States.
@article{osti_435554,
title = {Optimization study of selective emitter thermophotovoltaic systems},
author = {Good, B S and Chubb, D L and Lowe, R A},
abstractNote = {At the NASA Lewis Research Center the authors have developed a systems model for a general thermophotovoltaic (TPV) system. The components included in the model are a solar concentrator, receiver, emitter, window, filter and photovoltaic (PV) array. The system model requires the concentrator and receiver efficiencies, the wavelength dependence of the optical properties of the components, together with the emitter temperature, and the PV cell spectral response and current-voltage characteristic. With these inputs, the system efficiency and power output are calculated. For a selective emitter TPV system it is the emitter spectral emittance that is the major determinant of system performance. The selective emitter model is characterized by four distinct emittances: the spectral emittance within a single relatively narrow emission band, much lower emittances on either side of this band, and a long-wavelength-limit emittance. The PV cell model is ideal in that it assumes a quantum efficiency of one. The authors also assume that the selective emitter is perfectly coupled to the PV cell--the photon energy of the radiation leaving the selective emitter is just greater than the bandgap energy of the PV cell, so that the cells will operate with maximum efficiency. In this paper, the authors present results of an optimization study of a selective emitter TPV system. They vary the emitter temperature, the spectral emittances and emission bandwidth of the emitter, the PV cell bandgap energy, the cell back-surface reflectivity, and the long-wavelength emission band limit of the emitter, and discuss the effects that the variation of each of these parameters has on system performance.},
doi = {},
url = {https://www.osti.gov/biblio/435554}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {12}
}

Conference:
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