Study on the Structure and Performance of R23 Supercritical Heat Pump Water Boiler
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.
water boilerheat pumpsupercriticalR23energy conservation
NETL
NSTL
万方数据
