Experimental study on spray heat transfer characteristics of microencapsulated phase change material suspension

被引：0
|
作者：
Dong B. [1 ]
Xue Y. [1 ]
Liang K. [1 ]
Yuan Z. [2 ]
Wang L. [1 ]
Zhou X. [1 ]
机构：
[1] Advanced Refrigeration Cycle and Thermal Process Control Institute, Henan University of Science and Technology, Henan, Luoyang
[2] Graduate School of Natural Science and Technology, Okayama University, Okayama
来源：
Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 07期
关键词：
convection; heat transfer; microencapsulated phase change material suspension; particle; spray; supercooling;
D O I：
10.11949/0438-1157.20220192
中图分类号：
学科分类号：
摘要：
According to the special properties of microencapsulated phase change material to store and release latent heat, microencapsulated phase change material suspension (MPCMS) and pure water were used as spray media respectively to build a small spray tower device, in which the core material of microencapsulated phase change material is n-dodecane (C22H46). Five spray temperatures (35, 40, 44, 47, 51℃), three air flows (0.011, 0.018, 0.025 m3/s) and two diameters (SMD=80, 240 μm) were set as experimental variables. The heat transfer characteristics between the two media that described and air were investigated. The experimental results show that the supercooling of the phase change microcapsules will affect the heat transfer process. Under normal temperature and humidity, for small droplets, when the air flow rate is 0.018 and 0.025 m3/s, MPCMS at 44 and 47°C can promote heat transfer better than pure water at the same temperature. When air flow rate is 0.011 m3/s, MPCMS at 44°C can promote heat transfer better than pure water at the same temperature. For large droplets, MPCMS with spraying temperature of 44°C has better heat transfer effect than pure water with spraying medium at the same temperature under three kinds of air flow. © 2022 Chemical Industry Press. All rights reserved.
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页码：2971 / 2981
页数：10
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