Analysis of a Two-Stage Linear Fresnel Reflector Solar Concentrator

[+] Author and Article Information
D. Feuermann, J. M. Gordon

Center for Energy and Environmental Physics, Jacob Blaustein Institute for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus 84993, Israel; Pearlstone Center for Aeronautical Engineering Studies, Department of Mechanical Engineering, Ben-Gurion University of the Negev, Beersheva, Israel

J. Sol. Energy Eng 113(4), 272-279 (Nov 01, 1991) (8 pages) doi:10.1115/1.2929973 History: Received October 01, 1990; Revised May 01, 1991; Online June 06, 2008


The two-stage linear Fresnel reflector solar concentrator is analyzed via an in-depth study of an installed, nominally 220 KWt system. The concentrator includes: (1) a primary linear Fresnel reflector comprised of curved mirrors and (2) a secondary nonimaging CPC-type trough with a tubular receiver. The principal practical design options for the secondary concentrator are evaluated. Via a computer simulation which includes ray-tracing of the primary reflector, we evaluate the sensitivity of energy output to: concentrator optical errors, system geometry, tracking mode, and the option of using flat versus curved primary mirrors. The two-stage Fresnel concentrator can be considerably less expensive than the corresponding parabolic trough collector, but is found to deliver about one-fourth less yearly energy. However, much of this difference could be eliminated through the use of higher-quality CPC reflectors.

Copyright © 1991 by The American Society of Mechanical Engineers
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