结霜工况下微通道蒸发器数值模拟  

Numerical simulation of microchannel evaporator under frost condition

作　　者：尚泽栋 王洪利 梁精龙 张振迎 Shang Zedong;Wang Hongli;Liang Jinglong;Zhang Zhenying(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,China;College of Civil and Arehitetural Engineering,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学冶金与能源学院,唐山063210 [2]华北理工大学建筑工程学院,唐山063210

出　　处：《低温与超导》2022年第7期34-38,共5页Cryogenics and Superconductivity

基　　金：国家自然科学基金(51774143);河北省自然科学基金(E2020209121);唐山市科技创新团队培养计划项目(21130207D)资助。

摘　　要：基于相变原理,以微通道平行流蒸发器为研究对象,建立了管内制冷剂换热模型,对结霜工况下微通道蒸发器进行了研究。结果表明,制冷剂入口温度、湿空气含湿量及翅片迎面风速三种工况下,制冷剂液相体积分数随时间的延长均呈现先减小后增加的趋势。其中,制冷剂入口温度工况下变化尤为显著。蒸发器壁面温度变化则与液相体积分数变化趋势相反。研究结果为微通道蒸发器结霜研究提供参考。Based on the phase transition principle,a refrigerant heat exchange model in tube was established for the micro-channel evaporator,and the micro-channel evaporator under frosting conditions was studied.The results show that the liquid phase volume fraction of refrigerant decreases first and then increases with time under three conditions,i.e.inlet temperature of refrigerant,humidity ratio and wind speed of fins.The change of refrigerant inlet temperature is particularly significant and the change of evaporator wall temperature is opposite to that of liquid volume fraction.The research results provide reference for the frosting research of micro-channel evaporator.

关 键 词：微通道蒸发器 结霜 数值模拟 两相流 

分 类 号：TB657[一般工业技术—制冷工程]