A SOLAR TEST COLLECTOR FOR EVALUATION OF BOTH SELECTIVE AND NON-SELECTIVE ABSORBERS

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A solar test collector was designed for the testing of thermally absorbing coatings under controlled conditions. The design consisted of a collector fed by a controlled temperature fluid within the range of 25-90 C (77-194 F). This temperature was maintained by a custom electronic controller. A small variable flow pump circulated water through three collector pipes at selected flow rates. Strip heaters coupled with a differential temperature controller compensated for edge losses associated with small collectors. Detailed design and operation data were presented and three black chrome and one nonselective absorber were analyzed in detail by test collector measurements. Results ... continued below

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45

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Lampert, Carl M. & Washburn, Jack June 1, 1978.

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A solar test collector was designed for the testing of thermally absorbing coatings under controlled conditions. The design consisted of a collector fed by a controlled temperature fluid within the range of 25-90 C (77-194 F). This temperature was maintained by a custom electronic controller. A small variable flow pump circulated water through three collector pipes at selected flow rates. Strip heaters coupled with a differential temperature controller compensated for edge losses associated with small collectors. Detailed design and operation data were presented and three black chrome and one nonselective absorber were analyzed in detail by test collector measurements. Results showed efficiencies as high as 77% and 75% ({Delta}T = 0) were obtained respectively for 1.0 {micro}m black chrome on copper and nickel plated steel. The lowest loss coefficients were about 3.8 w/m{sup 2} C for all black chrome/metal surfaces with the highest being 8.4 w/m{sup 2} C for the black paint/metal sample. Also, a collector model was presented for comparison.

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45

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  • Journal Name: International Journal of Solar Energy

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  • Report No.: LBL-6974
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 1004781
  • Archival Resource Key: ark:/67531/metadc830587

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • June 1, 1978

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • July 26, 2016, 5:48 p.m.

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Lampert, Carl M. & Washburn, Jack. A SOLAR TEST COLLECTOR FOR EVALUATION OF BOTH SELECTIVE AND NON-SELECTIVE ABSORBERS, article, June 1, 1978; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc830587/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.