Abstract
In this paper, a cold storage air conditioning system based on a phase change micro-capsule material was constructed. The appropriate micro-encapsulated phase change materials were selected according to the temperature of the generator and evaporator. In addition, phase change materials were encapsulated and mixed with water with good thermal conductivity to form phase change micro-capsule suspensions, which takes into account the latent heat, fluidity and thermal conductivity of the phase change. Three kinds of micro-capsule phase change material suspensions with good stability and mass fractions of 5%, 10% and 15% were prepared. The main thermophysical parameters of the suspensions were obtained by analysis. In addition, the cold storage characteristics of the phase change micro-capsule suspensions in the cold storage tank of the composite system were experimentally studied. The results showed that the best composition ratio of base liquid was 99.1% deionized water, 0.2% SDS, 0.2% xanthan gum, and 0.5% NaCl. At the same cold storage time, compared with the evaporation temperature of −5 °C, when the evaporation temperature was −10 °C, the cooling capacity of the system decreased significantly. The cold storage capacity of phase change cold storage was approximately 1.5 times higher than that of ice cold storage, and the overall performance of phase change cold storage was better than that of ice cold storage. The developed phase change micro-capsule suspension has been considered to have some effect on phase change cold storage.
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