摘要
从实验和热力学循环分析两方面研究了采用低全球变暖潜能值(GWP)工质R1234yf、R152a和R1234ze的闭式两相热声发动机起振特性和系统性能。实验结果显示,采用R1234yf、R152a和R1234ze等三种工质时,系统的起振温差依次升高。R1234yf系统的起振温差最低,仅约为13.1 K。而热力学循环计算结果表明,R152a系统的单位质量做功、热效率和相对卡诺效率均为最高。当热端温度为330 K,冷端温度为300 K时,R152a系统的相对卡诺效率最高可达86.50%。可见,R1234yf、R152a和R1234ze作为低GWP工质应用在两相热声发动机中是可行的。
The onset characteristics and system performance of a closed two-phase thermoacoustic engine with the working fluids of low global warming potential(GWP),e.g., R1234 yf,R152 a and R1234 ze,are investigated in terms of experiment and thermodynamic cycle analysis.The experimental results show that the onset temperature difference of the engine is in the increasing order of R1234 yf,R152 a,and R1234 ze.A lowest onset temperature difference of 13.1 K can be obtained when using R1234 yf as working fluid.Besides,the calculation results show that the R152 a system obtains the highest specific work per unit mass,thermal efficiency and relative Carnot efficiency.When the hot and cold temperatures are 330 K and 300 K,a highest relative Carnot efficiency achieved is 86.50%with R152 a as working fluid.This work verifies the applicability of low GWP working fluids for a two-phase thermoacoustic engine.
作者
谭靖麒
罗嘉奇
魏健健
金滔
TAN Jing-Qi;LUO Jia-Qi;WEI Jian-Jian;JIN Tao(Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province,Institute of Refrigeration and Cryogenics,Zhejiang University,Hangzhou 310027,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2020年第11期2641-2645,共5页
Journal of Engineering Thermophysics
基金
浙江省自然科学基金重点项目(No.LZ20E060004)
国家自然科学基金资助项目(No.51576170)。
关键词
低GWP工质
两相热声发动机
起振温差
热力学循环
低品位热能
low global warming potential working fluid
two-phase thermoacoustic engine
onset temperature difference
thermodynamic cycle
low-grade thermal energy
