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Proceedings Paper

Linear Echelon Refractor/Reflector Solar Concentrators
Author(s): Dennis F. Vanderwerf; Raymond H. Anderson; Roger H. Appeldorn
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Paper Abstract

This paper describes some new configurations for linear incremental or Fresnel refractors and reflectors for solar energy concentration. The first system, a reflex type lens, uses crossed linear echelon elements and has convergence power in two dimensions. This refractor/reflector concentrates solar radiation to a spot focus. Large area solar concentrators can be sectionally constructed to provide high power solar flux concentration. The second type of echelon reflector forms a linear focus of incident solar radiation. The reflector is selectively tilted with respect to incoming solar radiation, such that the design eliminates all riser step blockage of radiation at the reflecting echelons. This results in a higher efficiency concentrator than is achievable with a normally oriented linear focus concentrator. Design parameters and a ray trace analysis are presented for both concentrator systems.

Paper Details

Date Published: 17 November 1978
PDF: 6 pages
Proc. SPIE 0161, Optics Applied to Solar Energy IV, (17 November 1978); doi: 10.1117/12.956868
Show Author Affiliations
Dennis F. Vanderwerf, 3M Company (United States)
Raymond H. Anderson, 3M Company (United States)
Roger H. Appeldorn, 3M Company (United States)

Published in SPIE Proceedings Vol. 0161:
Optics Applied to Solar Energy IV
Keith D. Masterson, Editor(s)

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