商超用不同过冷形式CO_(2)增压制冷系统性能分析  

Performance Analysis of Several Different Supercooled Transcritical CO_(2) Booster Refrigeration Systems for Commercial Supermarket

作　　者：杨俊兰 陈丹丹 殷明 詹宇航 YANG Junlan;CHEN Dandan;YIN Ming;ZHAN Yuhang(School of Energy and Security Engineering,TCU,Tianjin 300384,China)

机构地区：[1]天津城建大学能源与安全工程学院,天津300384

出　　处：《天津城建大学学报》2025年第1期32-37,共6页Journal of Tianjin Chengjian University

基　　金：天津市科技特派员项目(22YDTPJC00020);天津市教委项目(2019KJ113);天津市研究生科研创新项目(2022SKYZ213)。

摘　　要：提出了跨临界CO_(2)内部过冷增压制冷(ISBC)系统来提升商超用跨临界CO_(2)增压制冷系统的性能,为了探究提出的ISBC系统的性能,与几种不同过冷形式的CO_(2)增压制冷系统进行比较,分别建立了系统的热力学模型,分析系统的制冷量、压缩机耗功、COP、分流比随着高压压力和环境温度等参数的变化规律.结果表明:在高压压力大于10.5 MPa时,ISBC系统分别比常规跨临界CO_(2)增压制冷(BC)系统、跨临界CO_(2)回热器增压制冷(IHBC)、跨临界CO_(2)机械过冷增压制冷(MSBC)系统的COP高出了16.0%,13.7%,2.5%;在环境温度5~30℃范围内,ISBC系统的平均COP值分别比BC系统和MSBC系统提升了17.5%和11.2%,而平均压缩耗功分别比两个系统降低了15.1%,25.0%;ISBC系统存在一个最小分流比为0.72,过冷范围在0~26.7℃以保证系统正常运行.This paper presents a transcritical CO_(2)internal supercooled booster refrigeration(ISBC)system to improve the performance of the commercial transcritical CO_(2)booster refrigeration system,and compares it with several different supercooled CO_(2)booster refrigeration systems,which are conventional transcritical CO_(2)booster refrigeration(BC)cycle,transcritical CO_(2)mechanical supercooling booster refrigeration(MSBC)cycle,transcritical CO_(2)booster refrigeration with internal heat exchanger(IHBC)cycle.The thermodynamic models were established respectively,and the effects of high pressure and ambient temperature on refrigerating capacity,compressor power consumption,COP,and split ratio were analyzed.The results show that when the high pressure is more than 10.5 MPa,the COP of ISBC is 16%,13.7%,and 2.5%higher than that of BC,IHBC,and MSBC,respectively.In the range of ambient temperature 5℃~30℃,the mean COP of the ISBC system is 17.5%and 11.2%higher than that of BC and MSBC,respectively,and the mean compression power is 15.1%and 25%lower than that of BC and MSBC respectively.There is a minimum split ratio of 0.72 in the ISBC and a supercooling range of 0℃~26.7℃to ensure the normal operation of the system.

关 键 词：跨临界CO_(2) 内部过冷 增压制冷系统 分流比 

分 类 号：TB657[一般工业技术—制冷工程]