Temperature Control Performance and Cooling Release Characteristics of PCM in Large Space:Case Study of Cold Storage  

作　　者：Zhengrong Shi Hai Hong Yanming Shen Jingyong Cai 

机构地区：[1]College of Energy and Mechanical Engineering,Shanghai University of Electric Power,Shanghai,201306,China [2]Research and Development Center,Heatmate New Energy Technology Co.,Ltd.,Shanghai,200090,China [3]Shanghai Non-Carbon Energy Conversion and Utilization Institute,Shanghai Jiao Tong University,Shanghai,200240,China

出　　处：《Energy Engineering》2025年第3期885-903,共19页能源工程(英文)

基　　金：supported by National Natural Science Foundation of China(Nos.51806092,52201410);Non-Carbon Energy Conversion and Utilization Institute under the Shanghai Class IV Peak Disciplinary Development Program,High-End Foreign Experts Recruitment Plan of China(G2022013028L).

摘　　要：Phase Change Material(PCM)-based cold energy storage system(CESS)can effectively utilize the peak and valley power resources to reduce the excessive dependence on the power grid.In this study,a PCM-based CESS was designed for cold storage applications.The optimal number of PCM plates was determined through numerical simulations to meet the required cold storage temperature and control time.Additionally,the air temperature field,flow field,and melting characteristics of the PCMplates during the cooling release process were analyzed.The effects of plate positioning and thickness on the cooling release performance were further investigated.The results indicated that when 64PCMplateswere used,the duration formaintaining temperatures below−18℃increased from0.6 h to approximately 16.94 h.During the cooling release process,the temperature field in the cold storage exhibited stratification,and the melting of the PCM plates was non-uniform.Placing the PCM plates at the top or within the interlayers without cargo above proved more effective,with their cooling release power being approximately twice that of the PCM plates placed in the interlayers with cargo above.Furthermore,reducing the thickness of the PCMplates from15 to 7.5mmresulted in a 3.6-h increase in the time below−18℃and a 4.5-h reduction in the time required to reach 80%liquid phase fraction.

关 键 词：Cold storage cold energy storage system PCM plates cooling release characteristics 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]