Theoretical analysis of air condition system for intensifying defrosting with latent energy storage material
The household air condition lacks a low-temperature heat source in defrost-ing mode and cannot realize the continuous heat supply indoors.The paper proposes a multifunctional heat-storing air condition system by combining a phase-change heat-storing exchanger to the original heat pump system.Based on the principle of energy con-servation,the article conducts preliminary theoretical analysis of the main process of the system using the refrigerant pressure-enthalpy diagram and the moist-air enthalpy-humidity diagram.Furthermore,several phase-change heat-storing materials are selected,and the phase change temperature of them is represented by different evaporation tempera-ture within the range of 10℃to 25℃.Then the changes in defrosting time and system COP at different phase change temperatures of the heat-storing materials are investigated through theoretical calculation,providing a theoretical basis for the selection of phase-change heat-storing materials.The analysis demonstrates that as the phase-change temper-ature increases,the power consumption of the compressor decreases significantly,the de-frosting power linearly increases,the COP increases from 5.7 to 8.9,and the defrosting time is reduced by about 80%compared to the traditional mode.
air conditionthermal storagedefrostingphase transition temperatureco-efficient of performance
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