Accession Number : AD0261701

Title :   MEASUREMENTS AND CALCULATIONS OF THE EFFECTS OF DISTORTIONS IN THE COLLECTOR SURFACE ON EFFICIENCIES OF UMBRELLA-TYPE SOLAR COLLECTORS

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s) : BOND,VICTOR R.

Report Date : AUG 1961

Pagination or Media Count : 1

Abstract : The meridional tensions along the ribs in a Mylar-covered umbrella-type solar collector produce a distortion in the reflecting surface that is detrimental to the image in the focal plane. Investigation was made to obtain measured and calculated geometric efficiencies of umbrella-type collectors as affected by these surface distortions. These studies show that if the tension transverse to the ribs is increased relative to the meridional tensions, the distortion is reduced and higher efficiencies can be attained, and if the transverse tension is small, the number of ribs in the collector must be increased for higher efficiencies. (Author)

Descriptors :   *MIRRORS, *SOLAR FURNACES, *STRESSES, *SHELLS(STRUCTURAL FORMS), ALUMINUM, BODIES OF REVOLUTION, DEFORMATION, REFLECTORS

Distribution Statement : APPROVED FOR PUBLIC RELEASE