摘要
本文提出了一种组份可变的非共沸工质喷气增焓(EFVI)热泵循环,采用分液冷凝器和闪蒸罐,实现工质组份多次变化,可提高蒸发压力、减小压缩机压比和压缩机出口温度。选取R290/R1336mzz(Z)、R1234yf/R1233zd(E)和R1243zf/R1234ze(Z)三种具有不同温度滑移的非共沸工质,对EFVI热泵循环进行了热力学分析,并与常规喷气增焓(FVI)热泵循环进行了对比。结果表明:在冷凝出口温度60℃,蒸发出口温度5℃,工质为R290/R1336mzz(Z)时,相比于FVI热泵循环,EFVI热泵循环的性能系数(COP)和?效率分别提高了11.21%和27.48%;工质为R1243zf/R1234ze(Z)时,EFVI热泵循环具有最大的COP。在低蒸发器出口温度和高冷凝器出口温度下,EFVI热泵循环更有优势。
In this paper,an enhanced flash vapor injection(EFVI)heat pump cycle working with variable constituents of zeotropic mixtures is proposed,in which a liquid separation condenser and a flash tank are adopted to achieve multiple changes of constituents for zeotropic mixture.It has the benefits of higher evaporating pressure,lower pressure ratio and discharge temperature in the compressor.R290/R1336mzz(z),R1234yf/R1233zd(E)and R1243zf/R1234ze(z)having different temperature glides are used as working fluid.Thermodynamic comparisons between EFVI heat pump cycle and comparisons with conventional flash vapor injection(FVI)heat pump cycle are also conducted.The results show that when the condensation outlet temperature is 60℃,the evaporation outlet temperature is 5℃,and R290/R1336mzz(Z)is employed,the coefficient of performance(COP)and exergy efficiency of EFVI heat pump cycle are increased by 11.21%and 27.48%,respectively,relatively to FVI heat pump cycle.When R1243zf/R1234ze(z)is used,EFVI heat pump cycle has the highest COP.At low evaporator outlet temperature and higher condenser outlet temperature,the advantageous EFVI heat pump cycle is more obvious.
作者
唐运通
陈健勇
陈颖
罗向龙
梁颖宗
何嘉诚
杨智
TANG Yuntong;CHEN Jianyong;CHEN Ying;LUO Xianglong;LIANG Yingzong;HE Jiacheng;YANG Zhi(School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,Guangdong,China)
出处
《制冷技术》
2023年第3期16-25,共10页
Chinese Journal of Refrigeration Technology
基金
国家自然科学基金(No.51706047)。
关键词
非共沸
喷气增焓热泵
变组份
性能系数
[火用]
Zeotropic mixture
Vapor injection heat pump
Adjustable constituents
Coefficient of performance
Exergy
