Thermal Change for Heat Exchanger Cooling System of PCM

Abstract

A current study is presented in which a real-size room at daytime is cooled by a heat charge and discharge in a latent-heat-storage unit of phase changed materials. The unit is designed as a shell-and-tube heat exchanger. The tubes are vertical and filled with a phase-change material. The PCM melts and the room air is cooled down to a comfortable level, which lasts as long as the PCM is melting. While the ambient temperature changes from 35◦C to 45◦C, the comfortable time and variations are analytically calculated. Some cases are considered: an insulated room, a room heated by the ambient. By using the averaged values defined for the phase changed materials, the obtained analytical calculations and solutions are carried out with the available data in the literature. It is shown that the present theoretical study results related to the cooling using ambient conditions and the different dimensions will have an effect on the time of cooling.In addition, it can be seen from the results that dimension has a dominant effect on the temperature of stored energy than conditions.

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