Thermal storage to the temperature control system of powerful blocks of electronic equipment with a short action time

Latent heat storage is one of the most efficient ways of thermal control. Unlike the sensible heat storage method, the latent heat storage method provides much higher storage density, with a smaller temperature difference between storing and releasing heat. This paper considers a spacecraft thermal control system based of solid-liquid phase change material for the high heat dissipating component which works intermittently with short duty. Different groups of thermal storage materials, such as metals, inorganic and organic materials are considered. Organic materials are defined as the optimal substances for the thermal control of spacecraft electronic equipment are determined. Most organic thermal storage materials are non-corrosive and chemically stable, exhibit little or no subcooling, are compatible with most materials and have a high latent heat per unit weight. Their main disadvantage is low value of the coefficient of thermal conductivity. The drawback of organic thermal storage materials application due to low thermal conductivity can be successfully resolved by means of parallel arrangement of the hyperheat-conducting plates in the volume of the heat accumulator. Analysis of the use of thermal accumulators with hyperheat-conducting plates as edges for optimal thermal modes of blocks of electronic equipment is presented. The calculation of the basic parameters of the thermal accumulator is performed. Mass of heat storage material, number of edges, spacing between edges depending on the temperature fluctuation amplitude, of the electronic equipment heat and properties of material was determined. On the basis of the solution of the heat equation the calculation of the heat exchange efficiency of edges in the volume of the heat accumulator is made. Higher heat exchange efficiency of the hyperheat-conducting plates compared to copper edges is showed.