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An analytical and experimental evaluation of the plano-cylindrical Fresnel lens solar concentratorPlastic Fresnel lenses for solar concentration are attractive because of potential for low-cost mass production. An analytical and experimental evaluation of line-focusing Fresnel lenses with application potential in the 200 to 370 C range is reported. Analytical techniques were formulated to assess the solar transmission and imaging properties of a grooves-down lens. Experimentation was based primarily on a 56 cm-wide lens with f-number 1.0. A sun-tracking heliostat provided a non-moving solar source. Measured data indicated more spreading at the profile base than analytically predicted. The measured and computed transmittances were 85 and 87% respectively. Preliminary testing with a second lens (1.85 m) indicated that modified manufacturing techniques corrected the profile spreading problem.
Document ID
19770066100
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hastings, L. J.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Allums, S. L.
(NASA Marshall Space Flight Center Huntsville, Ala., United States)
Cosby, R. M.
(Ball State University Muncie, Ind., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1976
Subject Category
Energy Production And Conversion
Meeting Information
Meeting: Joint Conference on Sharing the sun: Solar technology in the seventies
Location: Winnipeg
Country: Canada
Start Date: August 15, 1976
End Date: August 20, 1976
Accession Number
77A48952
Distribution Limits
Public
Copyright
Other

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