Accession Number : ADA305310

Title :   Optimization of Thin-Film Transparent Plastic Honeycomb Covered Flat-Plate Solar Collectors. Phase 2.

Descriptive Note : Final rept.,

Corporate Author : LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CA PALO ALTO RESEARCH LAB

Personal Author(s) : McCargo, M. ; Marshall, K. N. ; Greenberg, S. A. ; Wedel, R. ; Dammann, R.

PDF Url : ADA305310

Report Date : 25 MAY 1978

Pagination or Media Count : 124

Abstract : An analytical and experimental program was conducted to develop an optimized transparent plastic honeycomb for use in a flat-plate solar collector system. Analysis was performed on both low- and high-temperature candidate plastics from the point of view of ease of manufacture, performance, and total cost. Detailed testing was performed on two candidate honeycomb materials - Mylar and Lexan - using Glass, Tedlar, and Teflon as the cover materials. Although a Teflon system gave a high collector performance, difficulty in manufacture and high material costs ruled out the possible economical use of the system at present. The Lexan/Glass and Lexan/Tedlar system of honeycomb/cover gave similar results which were higher than those for the Mylar systems. A thermal protection technique was developed for the 'coolant stagnation' situation, in which the honeycomb was raised above the absorber plate surface.

Descriptors :   *OPTIMIZATION, *THIN FILMS, *TRANSPARENCE, *PLASTICS, *HONEYCOMB STRUCTURES, *SOLAR COLLECTORS, LOW TEMPERATURE, COST EFFECTIVENESS, PERFORMANCE TESTS, HIGH TEMPERATURE, PLATES, PROTECTION, COOLANTS, THERMAL DEGRADATION, STAGNATION, TETRAFLUOROETHYLENE RESINS.

Subject Categories : Electric Power Production and Distribution
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE