METHODOLOGY FOR DETERMINING THE EXPECTED PRESSURE IN NON-EXPANDING ACCUMULATING STRUCTURES

Abstract

Shrinkage has a great influence on the operation of the heat accumulator design, therefore, when developing structures with heat storage materials, it becomes necessary to determine the pressure in a non-expanding (closed) storage structure from the compressibility coefficient of the material, which can be considered an operational characteristic of the material. The article presents data on shrinkage (and expansion) of the investigated heat-storage materials and a method for estimating the pressure that can develop in sealed battery structures completely filled with heat-storage materials in a crystalline state. It has been determined that, for the normal operation of structures with heat storage material, it is necessary either to create conditions in it that allow avoiding an increase in pressure, or when filling the structures of the accumulator of heat storage material, take into account the shrinkage of the material, or use heat storage material with melting temperatures lower than is required when working at atmospheric pressure. pressure.