Accession Number : ADA303280

Title :   Real Time Outdoor Exposure Testing of Solar Cell Modules and Component Materials.

Descriptive Note : Technical memo.,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Anagnostou, Evelyn ; Forestieri, Americo F.

PDF Url : ADA303280

Report Date : APR 1977

Pagination or Media Count : 13

Abstract : Plastic samples, solar cell modules and sub-modules have been exposed at test sites in Florida, Arizona, Puerto Rico and Cleveland, Ohio, in order to determine materials suitable for use in solar cell modules with a proposed 20-year lifetime. Various environments have been encountered including sub-tropical, sub-tropical with a sea air atmosphere, desert, rain forest, normal urban, and urban polluted. The samples have been exposed for periods up to six months. Materials found not suitable were polyurethane, polyester, Kapton, Mylar and Uv-stabilized Lexan. Suitable materials were acrylic, FE P-A and glass. The results of exposure of polyvinylidene fluoride were dependent on the specific formulation but several types appear suitable. RTV silicone rubber (clear) appears to pick up and hold dirt both as a free film and as a potting medium for modules. The results indicate that dirt accumulation and cleanability are important factors in the selection of solar cell module covers and encapsulants.

Descriptors :   *SOLAR CELLS, *PROTECTIVE COATINGS, *ENVIRONMENTAL TESTS, EXPOSURE(GENERAL), FORMULATIONS, FILMS, MODULAR CONSTRUCTION, RAIN, POLYMERIC FILMS, DIRT, POLYURETHANE RESINS, LIFE TESTS, PLASTICS, ALL WEATHER, POLYESTER PLASTICS, SILICONES, SYNTHETIC RUBBER, POLYVINYLIDENES, POLYIMIDE RESINS, POLYETHYLENE TEREPHTHALATE, POTTING.

Subject Categories : Electric Power Production and Distribution
      Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE