摘要
对微通道平行流蒸发器建立了分布参数模型,将蒸发器的控制单元分成干湿工况,采用效率传热单元数(ε-NTU)法对单元体的换热量进行计算.比较了不同的两相流传热关联式,并对蒸发器模型进行了实验验证.结果表明,使用Kandlikar的两相流换热关联式时换热量误差最小,平均误差为3.64%.模型计算的空气侧压降及制冷机侧压降计算误差分别在±10%和±15%以内,为平行流蒸发器的设计及优化提供了有效的分析方法.
A distributed parameter model for the micro-channel parallel flow evaporator was developed. Elements are divided into dry condition and wet condition, and the e-NTU （efficiency-number of transfer units） method is used to calculate the heat transfer rate. Different two-phase heat transfer correlations were compared and the model was verified by experiment. The results show that the model using Kandlikar＇s correlation obtains the highest precision, the calculated mean deviation is 3.64%. The model can predict airside and refrigerant side pressure drop within ±10% and ± 15% respectively. The model is an effective analytical method for the parallel flow evaporator development.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2013年第3期413-416,427,共5页
Journal of Shanghai Jiaotong University
关键词
蒸发器
微通道
两相流换热
仿真
evaporator
micro-channel
two phase heat exchange
simulation
