R23超临界热泵开水机的结构与性能研究  

Study on the Structure and Performance of R23 Supercritical Heat Pump Water Boiler

作　　者：宋鑫宇 谢继红[1] 郭子瑞 刘明权 文鑫 Song Xinyu;Xie Jihong;Guo Zirui;Liu Mingquan;Wen Xin(College of Mechanical Engineering,Tianjin University of Science&Technology,Tianjin,300222)

机构地区：[1]天津科技大学机械工程学院,天津300222

出　　处：《制冷与空调（四川）》2024年第2期237-241,共5页Refrigeration and Air Conditioning

摘　　要：针对电热开水机耗电多、R744(二氧化碳)超临界热泵开水机工作压力高等问题,对R23超临界热泵开水机的结构和性能进行了研究;以环境空气温度0℃、冷水温度15℃、开水温度100℃、开水产率130L/h(0.036kg/s)为背景,R23超临界热泵开水机采用单级压缩循环即可满足要求,工作压力仅需10.0MPa,加热器内热泵工质与水的最小传热温差可在5℃以上,制热系数可达2.68,耗电功率约为电热开水机的37%;上述条件下采用R744作为超临界热泵开水机工质时,制热系数与R23超临界热泵开水机相近,但需要采用带级间冷却的两级压缩循环,且工作压力需14.0MPa;综上,R23超临界热泵开水机比电热开水机可大幅度降低耗电量,且工作压力和系统复杂性显著低于R744超临界热泵开水机,具有较好的应用优势。A study was conducted on the structure and performance of R23 supercritical heat pump water boiler to address the issues of high power consumption of electric water boiler and high working pressure of R744(carbon dioxide)supercritical heat pump water boiler.Taking the ambient air temperature of 0℃,the cold water temperature of 15℃,the boiling water temperature of 100℃,and boiling water rate of 130L/h(0.036kg/s)as the background,the R23 supercritical heat pump water boiler can meet the requirements by using a single stage compression cycle,with a working pressure of only 10.0MPa.The minimum heat transfer temperature difference between the heat pump working medium and water in the heater can be above 5℃,the coefficient of performance can reach 2.68,and the power consumption is about 37%of that of the electric water boiler.Under the above conditions,when R744 is used as the working medium for the supercritical heat pump water boiler,the coefficient of performance is similar to that of R23 supercritical heat pump water boiler,but a two-stage compression cycle with interstage cooling is required,and the working pressure needs to be 14.0MPa.In summary,compared with the electric water boiler,R23 supercritical heat pump water boiler can significantly reduce power consumption,and the working pressure and system complexity are significantly lower than that of R744 supercritical heat pump water boiler,which has significant application advantages.

关 键 词：开水机 热泵 超临界 R23 节能 

分 类 号：TM925[电气工程—电力电子与电力传动]