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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
19990063975
Document Type
Reprint (Version printed in journal)
Authors
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
IECEC-99-01-2679
NASA/TM-1999-209375
E-11670-1
NAS 1.15:209375
Meeting Information
Intersociety Energy Conversion Engineering(Vancouver, British Columbia)
Funding Number(s)
PROJECT: RTOP 632-1A-1E
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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