跨临界CO_(2)空气源热泵热水器的实验与仿真研究  

EXPERIMENTAL AND SIMULATION STUDY ON TRANSCRITICAL CO_(2) AIR SOURCE HEAT PUMP WATER HEATER

作　　者：杨俊兰 陈丹丹 张鑫 Yang Junlan;Chen Dandan;Zhang Xin(School of Energy and Security Engineering,Tianjin Chengjian University,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：《太阳能学报》2024年第12期581-587,共7页Acta Energiae Solaris Sinica

基　　金：天津市科技特派员项目(22YDTPJC00020);天津市教委项目(2019KJ113)。

摘　　要：为提高CO_(2)空气源热泵热水器的性能,搭建该系统实验装置,测试冷却水流量、高压压力和压缩机频率等参数的影响。进而建立带喷射器的跨临界CO_(2)准二级压缩热泵系统(TCIEJ)的仿真模型,对系统性能进行模拟计算。结果表明:当冷却水流量从70 kg/h增大到122.5 kg/h时,COP提升30%,而冷却水出口温度降低15.4%。随着高压压力的增大,COP存在最大值,气体冷却器出口温度和冷却水出口温度均升高。当压缩机频率从110 Hz增大到180 Hz时,排气压力升高22.3%,但系统COP下降44.6%。TCIEJ系统高压压力从8.0 MPa增大到10.4 MPa时,冷却水出口温度平均升高17.66℃。环境温度为0℃、高压压力达10.4 MPa时,压缩机排气温度仅为85.77℃,说明此系统有利于改善压缩过程。当冷却水流量从60 L/h增大到100 L/h时,冷却水出口温度平均降低6.8℃。In order to improve the performance of CO_(2) air source heat pump water heater,an experimental device was built,and the effects of cooling water flow,high pressure and compressor frequency were tested.Furthermore,the simulation model of trans-critical CO_(2) quasi-two-stage compression heat pump with ejector(TCIEJ)was established,and the system performance was simulated.The results show that when the flow rate of cooling water increases from 70 kg/h to 122.5 kg/h,COP increases by 30%,while the outlet temperature of cooling water decreases by 15.4%.With the increase of high pressure,the COP has a maximum value,the outlet temperature of gas cooler and cooling water both increase.When the compressor frequency increases from 110 Hz to 180 Hz,the exhaust pressure increases by 22.3%,but COP decreases by 44.6%.When the high pressure of TCIEJ system increases from 8.0 MPa to 10.4 MPa,the outlet temperature of cooling water increases by 17.66℃,even when the ambient temperature is 0℃and the high pressure reaches 10.4 MPa,the exhaust temperature of the compressor is only 85.77℃,this system is conducive to improving the compression process.When the flow rate of cooling water increases from 60 L/h to 100 L/h,the outlet temperature of cooling water decreases by 6.8℃.

关 键 词：CO_(2) 空气源热泵 准二级 喷射器 系统性能 

分 类 号：TB65[一般工业技术—制冷工程]