壳管式换热器分配器内两相流动分配特性分析  

Analysis of Two-phase Flow Distribution Performance of Distributor in Shell-tube Heat Exchanger

作　　者：刘斌 傅羽欣 黄天骢 胡海涛[2] LIU Bin;FU Yuxin;HUANG Tiancong;HU Haitao(Zhejiang Extek Technology Co.,Ltd.,Anji 313300,Zhejiang,China;Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]浙江英特科技股份有限公司,浙江安吉313300 [2]上海交通大学制冷与低温研究所,上海200240

出　　处：《制冷技术》2023年第3期26-29,57,共5页Chinese Journal of Refrigeration Technology

基　　金：国家自然科学基金(No.51976115)。

摘　　要：本文建立了纯逆流干式壳管蒸发器分配器两相流分配模型,分析了分配器结构和节流孔径对分流均匀性的影响,并对分配器进行了结构优化设计。实验验证表明,模型能够准确预测分流器的性能。前端不开孔的分配器分配特性较好;缩小节流孔有助于两相制冷剂的均匀分配,对于前端不开孔的分配器,节流孔缩小使得换热量最大可提高39.6%;对于前端开孔的分配器,节流孔缩小使得换热量最大可提高36.5%。In this paper,the model of the distribution performance of the distributor in counter flow dry-expansion shell-tube evaporator is developed,and the influence of the structure and throttle hole diameter of the distributor on the two-phase flow distribution performance is analysed,and the structure of the distributor is optimized.The experimental results show that the model can accurately predict the performance of the distribution.The distribution characteristic of the distributor without opening hole at the front is better than that of distributor with opening hole.The decrement of the throttle hole diameter is conducive to the uniform distribution of the two-phase refrigerant.For the distributor without opening hole at the front,the decrement of the throttle hole diameter makes the heat transfer increase by 39.6%;for the distributor with the front opening hole,the decrement of the throttle hole diameter makes the heat transfer increase by 36.5%.

关 键 词：管分配器 壳管蒸发器 结构优化 分配性能 

分 类 号：TB611[一般工业技术—制冷工程] TQ051.5[化学工程]