Investigation on Thermal Properties of Phase Change Materials for Cool Storage Air-Conditioning System

摘要

The thermal properties of phase change cool storage materials including freezing and melting point, freezing and melting latent heat during the phase change process are investigated. The cool storage material is composed of two kinds of phase change materials. In the thermal analysis, the Differential Scanning Calorimeter (DSC) was used to determine the latent heat of the phase change material (PCM), and the infrared spectra instrument was used to determine the structure change of the PCM. The melting latent heat of the investigated PCM is 118.996 kJ/kg, and melting onset point of the PCM is 6.399℃. The heat capacity of the PCM investigated is larger than that of ordinary salt hydrates, and melting point of the PCM is higher than that of ice. The results show that the new PCM can be considered as an efficient cool storage material for cool storage air conditioning system.