摘要
为提高跨临界CO2热泵热水机的效率,通过搭建跨临界CO2热泵系统试验台,研究其性能,并找出其运行规律。试验结果表明:当终止水温度恒定,在某一蒸发温度下,热泵系统的制热量随着高压侧压力的升高先升高后降低,系统的COP存在一个最大值,即存在一个最优高压侧压力Popt;蒸发温度越高,系统的COP越高;同轴套管式换热器的内管用螺旋管代替圆管后,系统运行更加稳定,COP也有提高。
In order to promote the efficiency of trans-critical CO2 heat pump water heater,by building a trans-critical CO2 heat pump system experimental units,to study its performance and find its operating regular pattern.The results show that：when the termination temperature of water is constant,the heat of cooling water absorbs from the gas cooler increases first and then reduce as the high-pressure in an evaporation temperature;the COP of system exsists a maximum value,that is,there is an optimal high-pressure Popt;and the COP of system rises with evaporation temperature going up;after replacing the tube with spiral in inner tube of coaxial heat exchanger,the system works more stable and COP has been improved.
出处
《流体机械》
CSCD
北大核心
2011年第9期66-69,共4页
Fluid Machinery
基金
国家十一五科技支撑计划项目<建筑节能关键技术研究与示范>(低品位能源高效应用关键技术研究的子课题<CO2空气源热泵热水机组开发>(2006BAJ01A10-07)
