SIMULATION OF HEAT EXCHANGE PROCESSES IN THE “THERMAL CORE” FILLED WITH HEAT ACCUMULATION MATERIAL

Abstract

The presented article proposes an analytical method for modeling heat exchange processes inside the “thermal core”, which is a coaxial cylinder filled with heat storage material with a phase change material. The equation for heating the cooled phase change material inside the “thermal core” is derived, taking into account the radial transfer of heat in any i-th zone and in the first and last ring zones, separately. The dependence of the heat capacity of the phase change material on the temperature was studied, taking into account the change in the heat capacity according to the cosine law. Also, a comparison of the analytical data of the mathematical modeling with the results obtained experimentally in previous studies is presented and obtained a high degree of similarity, which indicates the reliability of the proposed analytical methodology. Recommendations are provided for the practical implementation of the research results, namely the use of a coaxial pipe “thermal core” filled with a pre-selected material with a phase change material in the construction of storage batteries used in the thermal power industry. As a result, capacitive batteries with a “thermal core” filled with ceresin are used in mobile thermal batteries MTA-0,5MW. Bibl. 14, Fig. 4, Tab. 2.