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A New Approach to Design Method of the Solar Compound Parabolic Concentrator with Tubular Absorber  

Kim, Seok-Jong (모인에너지(주))
Lim, Sang-Hoon (한국에너지기술연구원)
Publication Information
KIEAE Journal / v.2, no.3, 2002 , pp. 33-38 More about this Journal
Abstract
The intermediate range of temperatures($100{\sim}300^{\circ}C$) which can be achieved with CPCs(Compound Parabolic Concentrators) without tracking device provides both economic and thermal advantages for solar collector design. The present paper summarizes critical design considerations for CPC with cylindrical absorber and its optical performance using ray tracing program. Concentration ratios vary as acceptance half angle, ratio of reflector height to aperture width and ratio of reflector area to aperture area. This effects showed that the concentration ratio was increased as acceptance angle but optimum ratio of reflector height to aperture width existed at critical value. As a result of ray tracing, solar ray losses was maximized at acceptance half angle and this problem was solved by increasing absorber tube diameter. The concentrating flux distribution on the absorber surface was uniform but peak flux existed.
Keywords
Solar Compound Parabolic Concentrator; Acceptance half angle; Reflector;
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  • Reference
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