Accession Number : AD0274481

Title :   SOLAR REGENERATIVE CHEMICAL SYSTEM

Corporate Author : LOCKHEED MISSILES AND SPACE CO INC SUNNYVALE CA

Personal Author(s) : GANDEL, M.G.

Report Date : 31 DEC 1961

Pagination or Media Count : 1

Abstract : A regenerative-type fuel cell, with regeneration based on the thermal dissociation of CdI2 or SnI2, was shown to be unfeasible. The theoretical evaluation of the thermodynamics and high-temper-ATURE KINETICS OF BOTH SYSTEMS SUPPORTS THE NEGATIVE EXPERIMENTAL FINDINGS. The metal-molten salt thermocell was based on a large thermal gradient across the electrolyte which generates a potential between hot and cold metal to electrolyte junctions. The values of dE/dT (in micro v/deg), the change of potential with temperature differential, were experimentally determined and ranged from -30 to -100. A system is sought where dE/dT is on the order of several hundred micro v/deg. The double thermogalvanic cell utilizes an electrolytic cell operating at elevated temperature, to regenerate the reaction products of a fuel cell. Electrolysis of CdI2 was performed with approximately 40-% current efficiency; the low current efficiency was attributed to the solubility of molten Cd in the fused salt. Photochemically regenerative systems based on the reversible photochemical bleaching of water-soluble dyes were studied. The proflavine-ascorbic acid system was found to be the most successful. (Author)

Descriptors :   *CADMIUM COMPOUNDS, *FUEL CELLS, *IODIDES, *POWER SUPPLIES, *SOLAR CELLS, *TIN COMPOUNDS, BROMIDES, COPPER COMPOUNDS, DISSOCIATION, DYES, ELECTROCHEMISTRY, ENERGY CONVERSION, LEAD COMPOUNDS, PHOTOCHEMICAL REACTIONS, PHOTOSENSITIVITY, SOLAR RADIATION, TEMPERATURE, THERMOCHEMISTRY, THERMODYNAMICS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE