摘要
微通道蒸发器由于低充灌量、高换热性能、低成本等优点在制冷系统得以广泛应用。微通道蒸发器性能的进一步提升有助于降低制冷剂充灌量、增加微通道换热器的紧凑性。微通道蒸发器主要由集管和微通道扁管组成,优化集管内两相制冷剂分配和强化微通道扁管内流动沸腾,可有效实现微通道蒸发器整体性能提升。本文首先阐明了影响集管内两相分配的因素和微通道扁管内流动沸腾特性,然后概括了提升两相制冷剂的分配方案和强化流动沸腾的措施,最后对提升微通道蒸发器性能的方法做出进一步展望。
Microchannel evaporators are widely used in refrigeration systems due to low charge capacity,high heat transfer performance,and low cost.Further improvement in the performance of microchannel evaporators helps to reduce refrigerant charge and increase the compactness of microchannel heat exchangers.The microchannel evaporator is mainly composed of a header and microchannel flat tubes.Optimizing the distribution of two-phase refrigerant in the header and enhancing the flow boiling inside the microchannel flat tubes can effectively improve the overall performance of the microchannel evaporator.First,the factors affecting the two-phase distribution in the header and the flow boiling characteristics in the microchannel flat tube were clarified.Then,measures to improve the two-phase refrigerant distribution scheme and enhance flow boiling are summarized.Finally,further prospects are given for methods to improve the performance of microchannel evaporators.
作者
汤志轩
郭文华
吴思远
赵日晶
黄东
TANG Zhixuan;GUO Wenhua;WU Siyuan;ZHAO Rijing;HUANG Dong(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China)
出处
《化工学报》
EI
CSCD
北大核心
2023年第10期4020-4036,共17页
CIESC Journal
关键词
微通道蒸发器
两相分配
传热
蒸发
气液两相流
microchannel evaporator
two-phase distribution
heat transfer
evaporation
gas-liquid flow
作者简介
通信作者:黄东(1975-),男,博士,教授,d_huang@mail.xjtu.edu.cn;第一作者:汤志轩(1999-),男,硕士研究生,tangzhixuan@stu.xjtu.edu.cn。
