Optical Cascade Heat-Collection for Effective Solar Energy Gain

[+] Author and Article Information
Isao Oshida, Akio Suzuki

Department of Physics, Sophia University, Chiyoda-ku, Tokyo 102, Japan

J. Sol. Energy Eng 109(4), 298-302 (Nov 01, 1987) (5 pages) doi:10.1115/1.3268221 History: Received August 01, 1986; Online November 11, 2009


Optical cascade heat collection of solar energy has proved effective for gaining thermal energy in the medium temperature region (80∼150° C). The cascade system consists of two separate absorbers (one hot and the other warm) and an optical system including CPC’s and Fresnel lenses which concentrate the direct solar radiation on one of the two absorbers. The temperature of the heat transfer fluid can be increased effectively if the fluid flows into the warm absorber first and then flows into the hot absorber. This type of solar collector, having no mechanical tracking device, can theoretically collect heat at a higher temperature than usual flat-plate collectors.

Copyright © 1987 by ASME
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