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RESEARCH PAPERS

Improved Optical Design of Nontracking Concentrators

[+] Author and Article Information
B. M. Kwan, R. B. Bannerot

Department of Mechanical Engineering, University of Houston-University Park, Houston, Texas 77004

J. Sol. Energy Eng 106(3), 271-278 (Aug 01, 1984) (8 pages) doi:10.1115/1.3267595 History: Received April 01, 1983; Online November 11, 2009

Abstract

Optical designs based on a two reflections or less criterion have been developed for one and two-facet trapezoidal concentrators. Collector designs resulting from this criterion have been evaluated with the aid of a ray-trace computer simulation which includes the effects of nonideal reflectors. Results indicate a marked increase in performance, particularly for the one-facet designs, as compared to the collectors previously designed with the one reflection or less criterion. A significant result is that when a proper accounting is made for the actual acceptance angle for the concentrators, the performances of the optimal one and two-facet designs become nearly identical, indicating that the previously held contention that improved performance could be achieved with multifaceted reflectors (geometrically approaching the compound parabolic shape) may be incorrect.

Copyright © 1984 by ASME
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