摘要
换热管制冷剂分配不均是制约干式蒸发器性能的主要因素。为改善这一问题,本文提出了增设分液管和孔板两种优化方案,并利用CFD模拟和传热计算分析优化后各换热管分液均匀性、压降水平以及蒸发器换热性能的变化规律。结果表明:最优分液管方案及最优孔板方案混合相的均匀性相比样本分别提高了56.60%和60.80%,虽然带来了更大的压力损失,蒸发器换热量仍然可以提高19.69%和23.83%。
A main factor restricting the performance of dry-expansion evaporators is the imbalance of refrigerant distribution between each tube.In this study,two improvement schemes for setting a distribution pipe and an orifice plate have been proposed to address this problem.The computational fluid dynamics simulation and heat transfer calculation were used to analyze the changes in the uniformity of the refrigerant distribution,pressure drop,and heat transfer performance of the evaporator.The results showed that although they lead to greater pressure loss,the optimal distribution pipe and orifice plate improved the distribution uniformity by 56.60%and 60.80%,and the evaporator heat transfer of the two schemes improved by 19.69%and 23.83%,respectively,compared to the baseline.
作者
叶安琪
王吉进
钟衡
陈传宝
江辉民
倪龙
姚杨
Ye Anqi;Wang Jijin;Zhong Heng;Chen Chuanbao;Jiang Huimin;Ni Long;Yao Yang(School of Architecture,Harbin Institute of Technology,Harbin,150006,China;Key Laboratory of Cold Region Urban and Rural Human Settlement EnvironmentScience and Technology,Ministry of Industry and Information Technology,Harbin,150006,China;Northwest Branch of China Airport Construction Group Co.,Ltd.,Xi′an,710075,China;Nanjing Wuzhou Refrigeration Group Co.,Ltd.,Nanjing,211000,China)
出处
《制冷学报》
CAS
CSCD
北大核心
2022年第5期73-80,共8页
Journal of Refrigeration
关键词
流量分配
制冷剂
分液装置
传热系数
干式蒸发器
discharge distribution
refrigerant
distributor
coefficient of heat transfer
dry-expansion evaporator
