喷射增效自复叠制冷循环工质选择  

Selection of working fluids for the ejector enhanced auto-cascade refrigeration cycle

作　　者：黄鲤生 谈莹莹[1] 王林[1] 李金秋 Huang Lisheng;Tan Yingying;Wang Lin;Li Jinqiu(Institute of Building Energy and Thermal Science,Henan University of Science and Technology,Luoyang 471023,China)

机构地区：[1]河南科技大学建筑能源与热科学技术研究所,洛阳471023

出　　处：《低温与超导》2021年第6期49-56,68,共9页Cryogenics and Superconductivity

基　　金：国家自然科学基金(51706061,51876055,51806060)资助。

摘　　要：为选择适合喷射增效自复叠制冷循环的工质,选取R32/R1234ze、R23/R134a、R170/R290和R23/R227ea四组混合工质,计算分析在给定工况下不同工质对喷射增效自复叠制冷循环性能的影响,并与传统自复叠制冷循环进行对比。结果表明,在喷射增效自复叠制冷循环中,R170/R290制冷量最大,R23/R227e压缩机压比最小,R23/R227e具有最佳性能,其性能系数较传统自复叠制冷循环提高了13.8%—28.4%;各组混合工质均存在最优组分配比使循环COP最大。In order to select the suitable working fluids for the ejector enhanced auto-cascade refrigeration cycle,R32/R1234ze,R23/R134a,R170/R290,R23/R227ea mixtures were chosen to explore the effects of different factors on cycle performance,were also compared with that of the traditional auto cascade refrigeration cycle.The results show that the refrigerating capacity using R170/R290 is the largest,the compressor pressure ratio using R23/R227ea is minimum,and the best performance can be obtained using R23/R227ea in the ejector enhanced auto cascade refrigeration cycle.The COP of the ejector enhanced auto-cascade refrigeration cycle is 13.8%to 28.4%higher than that of the traditional auto-cascade refrigeration cycle.There is an optimal mass fraction for different refrigerants to maximize the COP.

关 键 词：非共沸工质 喷射器 热力学 自复叠 

分 类 号：TB657[一般工业技术—制冷工程]