CO2热泵热水系统试验研究

为了提高CO2热泵热水系统效率,针对CO2热泵系统跨临界循环特性,采用试验方法研究系统高压压力及回热循环对系统效率的影响。试验结果表明：系统排气压力对循环效率有显著影响,不同工况存在不同的最优压力;采用回热循环能够明显提高系统的制热能力和能效,系统能效最高可提高11%。同时,给出关于CO2热泵热水系统设计的一些参考建议。

Experimental research on CO2 heat pump water heater

In order to increase efficiency of CO2 heat pump water heater,aiming at transcritical cycle charcteristics of CO2 heat pump system, the experimental research on the influences of high discharge pressure and regenerative cycle on system efficiency is carried out. The experimental results show that system＇s discharge pressure can affect the system efficiency significantly,the optimal pressure and the operation condition is a one-to-one relationship. The heating capacity and COP can be increased obviously by using regenerative cycle, and the system＇s COP can be increased by a maximum of 11%. In addition, some references are put forward for the design of CO, heat pump water heater.