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Solar energy absorption efficiency of an ellipsoidal receiver-reactor with specularly reflecting walls

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  • Steinfeld, A.
  • Fletcher, E.A.

Abstract

An ellipsoidal cavity-receiver with specularly reflecting inner walls, in which the reactor component is positioned at one focal point and the aperture at the other, may be useful in solar applications. Most of the incident radiation from a solar concentrator should reach the reactor directly or after one reflection from the cavity walls. Because the source (aperture) and sink (reactor) have finite areas, the ellipsoidal reflector no longer conveys all of the entering radiation into the reactor; some radiation entering the cavity does not reach the target after one reflection and is eventually absorbed by the cavity walls after multiple reflections or escapes through the aperture. We have examined the conditions for which this radiation loss becomes significant and have estimated the effects on the energy-collection efficiency of the system.

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  • Steinfeld, A. & Fletcher, E.A., 1988. "Solar energy absorption efficiency of an ellipsoidal receiver-reactor with specularly reflecting walls," Energy, Elsevier, vol. 13(8), pages 609-614.
    • Handle: RePEc:eee:energy:v:13:y:1988:i:8:p:609-614
    DOI: 10.1016/0360-5442(88)90090-4
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    Cited by:

    1. Jin, Jian & Hao, Yong & Jin, Hongguang, 2019. "A universal solar simulator for focused and quasi-collimated beams," Applied Energy, Elsevier, vol. 235(C), pages 1266-1276.

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