摘要
分析了微通道蒸发器内制冷剂流动沸腾换热的经验关联式,建立了稳态分布参数和控制单元法的微通道蒸发器数学仿真模型。同时建立不同扁管宽度的微通道蒸发器样机并验证其在不同工况下的传热和压降性能。试验结果表明:微通道蒸发器工作时两相流制冷剂分配不均和冷凝水排除速度慢是造成微通道蒸发器在校核计算时计算值与试验值相差较大的主因。传热试验和修正的仿真模型为今后微通道蒸发器开发计算以及性能优化方面提供了参考。
The empirical correlation of refrigerant flow boiling heat transfer in micro-channel evaporator is analyzed.The mathematical simulation model of micro-channel evaporator based on steady-state distributed parameters and control unit method is established.At the same time,the micro-channel evaporator prototype with different width of flat tube is established and its heat transfer and pressure drop performance under different working conditions are verified.The results show that the difference between the calculated value and the test value of the micro flow in the evaporator is larger than that in the test.The heat transfer test and the modified simulation model provide a reference for the development and calculation of micro-channel evaporator and performance optimization in the future.
作者
王冠军
梁新宇
兰兆忠
魏文建
Wang Guanjun;Liang Xinyu;Lan Zhaozhong;Wei Wenjian(Zhejiang Dunan Thermal Technology Co.,Ltd.)
出处
《制冷与空调》
2021年第6期25-29,共5页
Refrigeration and Air-Conditioning
关键词
微通道
试验研究
传热传质
蒸发器
仿真模型
micro-channel
experimental research
heat and mass transfer
evaporator
simulation model
