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Nonimaging concentrators for photovoltaic arrays in spaceTwo stage concentrators are studied in order to design an optimum concentrator for photovoltaic arrays in space. The study is directed at designs with two-dimensional geometries because they are better suited to moderate concentrations of about 10 X to 50 X, and because the instantaneous flux distribution is more uniform. It is found that with an f/0.5 primary, where f is the focal length of the primary, the flux distribution is very smooth regardless of the angle of incidence of the radiation. As the focal ratio is increased, peaks in the distribution begin to appear. The nonuniformities can be reduced by introducing small, closely spaced distortions into the reflecting surfaces, and practical arrays can achieve a concentration of 10 when the acceptance half angle is 4.25 deg or 50 when the acceptance half angle is + or - 1 deg.
Document ID
19820028226
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Winston, R.
(Chicago Univ. Chicago, IL, United States)
Greenman, P.
(Chicago, University Chicago, IL, United States)
Rockey, D.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1981
Subject Category
Spacecraft Propulsion And Power
Meeting Information
Meeting: In: Intersociety Energy Conversion Engineering Conference
Location: Atlanta, GA
Start Date: August 9, 1981
End Date: August 14, 1981
Accession Number
82A11761
Distribution Limits
Public
Copyright
Other

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