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Optical Evaluation of a Refractive Secondary ConcentratorRefractive secondary concentrators are being considered for solar thermal applications because of their ability to archive maximum efficiency through the use of total internal reflection for the concentration and distribution of solar energy. A prototype refractive secondary concentrator was built based on ray tracing analysis to demonstrate this collection and distribution concept. The design included a conical secondary concentrator and a faceted extractor. The objective of this effort was to functionally evaluate the performance of the refractive secondary concentrator/extractor prototype and to compare the results with modeling. Most of the light was found to exit the refractive secondary concentrator through the extractor. In addition, the degree of attenuation encountered by the light as it passed through the refractive secondary concentrator was of interest. Quantifying optical output and validating the modeling will provide further understanding of the efficiency of the prototype and will provide insight for additional design and materials selection activities.
Document ID
Document Type
Reprint (Version printed in journal)
Jaworske, Donald A.
(NASA Glenn Research Center Cleveland, OH United States)
Wong, Wayne A.
(NASA Glenn Research Center Cleveland, OH United States)
Skowronski, Timothy J.
(Cleveland State Univ. Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1999
Subject Category
Chemistry And Materials (General)
Report/Patent Number
NAS 1.15:209375
Meeting Information
Meeting: Intersociety Energy Conversion Engineering
Location: Vancouver, British Columbia
Country: Canada
Start Date: August 1, 1999
End Date: August 5, 1999
Sponsors: Society of Automotive Engineers
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.
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