微通道换热器的数值模拟和结构优化  

Numerical simulation and structural optimization on microchannel heat exchangers

作　　者：郭春海[1] 陈希良[1] 杨旸[1] 张文武[1] 

机构地区：[1]中国科学院宁波材料技术与工程研究所,浙江宁波315201

出　　处：《计算机辅助工程》2015年第4期61-67,共7页Computer Aided Engineering

摘　　要：为提高微通道换热器的换热效率,利用COMSOL耦合求解流动和传热方程,对微通道换热器换热特征进行数值模拟.通过分析微通道换热器的温度、微通道的入口与出口的压差以及微通道换热器的总热阻等参数,对其换热性能进行评估.优化微换热器的几何结构可以有效提高换热性能.数值模拟结果表明:当微通道的高宽比为0.8、微通道与间隔的宽度比为0.6、微通道数为71时热阻最小,换热性能最佳.To improve the heat exchange efficiency of microchannel transfer equations are solved using COMSOL and the heat exchange heat exchanger, characteristics of the flow and heat microchannel heat exchanger is numerically simulated. The parameters such as the temperature, differential pressure between inlet and outlet and total thermal resistance of the microchannel exchanger are analyzed, and its heat exchange performance is evaluated. The heat exchange performance can＇be effectively improved by optimizing the geometry structure of microchannel heat exchanger. The numerical simulation results indicate that the thermal resistance can be minimized and the heat exchange can reach the best performance when the height to width ratio of microchannel is 0.8, the width ratio of microchannel to interval is 0.6, and the channel number is 71.

关 键 词：微通道 传热 热阻 压差 最高温度 

分 类 号：TK172[动力工程及工程热物理—热能工程]