Abstract

This paper presents results of the studies on the impact of different variants of the internal design of a thermal energy storage unit on the heat exchange process in a model, representative segment of the thermal energy storage unit filled with phase-change material (PCM). The influence of different configuration of fins on the heat exchange process was analysed. The results obtained from calculations were compared with the results for the design of the thermal energy storage unit with a smooth pipe. There were analysed parameters such as the temperature distribution in the phase-change material, the temperature of the charging medium at the outlet of the thermal energy storage unit, as well as the position and shape of the liquid-solid interface during the phase transition process.

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