Satellite Thermal Storage Systems Using Metallic Phase-Change Materials.

摘要

Solar (thermal) dynamic power systems for satellites require a heat storage system capable of operating the engine during eclipse. This paper describes a system in which the phase-change material (PCM) is a metal rather than the more conventional fluoride salts. Thermal storage modules consisting of germanium contained in graphite have good thermal conductivity, low parasitic mass, and are physically and chemically stable. We describe the result of thermal cycle testing of graphite capsules containing germanium and several germanium- and silicon-based alloys, as well as some initial tests of the compatibility of graphite with Nb-1%Zr structural materials. 7 refs., 7 figs., 3 tabs.