相变蓄热材料用于热泵空调强化除霜理论研究  

Theoretical analysis of air condition system for intensifying defrosting with latent energy storage material

作　　者：付梦婷 包睿祺 赵汀 沈九兵 Fu Mengting;Bao Ruiqi;Zhao Ting;Shen Jiubing(School of Energy and Power,Jiangsu University of Science and Technology)

机构地区：[1]江苏科技大学能源与动力学院

出　　处：《制冷与空调》2024年第9期15-21,共7页Refrigeration and Air-Conditioning

摘　　要：家用热泵型空调器在除霜模式下缺少低位热源,且无法实现室内的持续供暖,文章针对以上的问题,在原有热泵系统基础上增设相变蓄热换热器,提出了一种多功能相变蓄热空调系统,并基于能量守恒原理,利用制冷剂压焓图、湿空气焓湿图对该系统的过冷蓄热模式、供暖除霜模式进行了初步理论分析。进一步选取了多种相变蓄热材料,并通过在10~25℃范围内改变系统的蒸发温度来表征不同蓄热材料应用时的相变温度,进而通过理论计算研究不同蓄热材料相变温度下除霜时间、系统能效比的变化,为相变蓄热材料的选取提供理论依据。分析表明,随着材料的相变温度升高,压缩机功率下降幅度明显,除霜功率线性增加,COP值从5.7上升至8.9,除霜时间较传统模式缩短约80%。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 conservation,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 temperature 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 temperature increases,the power consumption of the compressor decreases significantly,the defrosting 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.

关 键 词：空气调节器 蓄热 除霜 相变温度 能效比 

分 类 号：TB6[一般工业技术—制冷工程]