一种自复叠制冷用冷凝器的优化设计  

The optimal design of condenser in auto-cascade refrigerator

作　　者：张丽 翟星然 舒卫华 ZHANG Li;ZHAI Xing-ran;SHU Wei-hua

机构地区：[1]大连海洋大学机械与动力工程学院,辽宁大连116023 [2]松下冷机系统(大连)有限公司,辽宁大连116600

出　　处：《节能》2019年第7期40-42,共3页Energy Conservation

基　　金：辽宁省教育厅科学研究项目(项目编号：L201626)

摘　　要：小型自复叠制冷装置在低温领域应用和研究日益广泛,其中,新型天然非共沸混合制冷剂R744/R290在冷凝器中的换热直接影响循环性能.对制冷剂在螺旋套管式水冷冷凝器中的凝结换热特性进行分析,基于冷热介质热量交换的合理假设,建立了冷凝器的稳态分布参数模型.进行了冷凝器结构和承压的优化设计,确定了各部分尺寸,最终完成了冷凝器设计计算,为后续整个自复叠制冷装置的设计和应用奠定基础.The application and research on small-sized auto-cascade refrigerators are used widely in cryogenic refrigeration. The condensation characteristics of R744/R290 in the condenser have an effect on the cycle performance. In this paper the condensation characteristics of R744/R290 were analyzed on the helically coiled concentric dual tube heat exchanger. Then based on the reasonable assumptions of the heat exchange of two fluid media in the condenser, the steadystate distributed parameter model was built. And optimizing the structure and pressure-bearing were performed to obtain the condenser measurements. The calculation of the condenser provides basis and ideas for the further research of autocascade refrigerators.

关 键 词：自复叠制冷 冷凝器 优化设计 非共沸混合制冷剂 R744/R290 凝结换热 

分 类 号：TB657[一般工业技术—制冷工程]