摘要
建立了带有闪蒸器的单螺杆压缩机制冷系统的补气增焓数学模型,对制冷系统进行热力学性能模拟研究,结果表明,当中间补气压力不断增加时,系统的排气温度表现为先降低到达某个最小值然后又逐渐升高,制冷系数COP先增大后逐渐减小,存在最佳中间补气压力为0.83 MPa。最佳中间补气压力与蒸发压力和冷凝压力的变化呈现正相关性,三者之间存在一定的函数关系。当制冷系统处于最佳补气压力状态时,相较于无补气的制冷系统,补气的制冷系统COP提高了2.8%,压缩机排气温度下降了4.1%。
A mathematical model of air-replenishment enthalpy-increase for a single screw compressor refrigeration system with a flasher was established. The thermodynamic performance of the refrigeration system was simulated. The results show that when the intermediate air replenishment pressure increases continuously, the exhaust temperature of the system first decreases to a certain minimum value and then gradually increases. The coefficient of performance(COP) increases first and then gradually decreases. It can be seen that there is an optimal intermediate air replenishment pressure of 0.83 MPa. There is a positive correlation between the optimal intermediate air supply pressure and the changes of evaporation pressure and condensation pressure, and there is a certain functional relationship among them. When the refrigeration system is in the optimal makeup pressure state, compared with the refrigeration system without makeup, the COP of the refrigeration system with makeup increases by 2.8%, and the exhaust temperature of the compressor decreases by 4.1%.
作者
陈飞
吴玉庭
沈纪东
张大鹏
温强宇
Chen Fei;Wu Yuting;Shen Jidong;Zhang Dapeng;Wen Qiangyu(Faculty of Environment and Life,Beijing University of Technology,Key Laboratory of Heat Transfer Enhancement and Energy Conservation of Education Ministry,Beijing Key Laboratory of Heat Transfer and Energy Utilization,Beijing 100124,China)
出处
《低温与超导》
CAS
北大核心
2022年第12期67-72,85,共7页
Cryogenics and Superconductivity
基金
内蒙古自治区科技重大专项(2019ZD014)资助。
关键词
闪蒸器
COP
补气增焓
排气温度
制冷
Flash
COP
Enhanced vapor injection
Exhaust temperature
Refrigeration
