分析了回热器对跨临界CO2压缩循环效率等的影响,推导出回热器对系统的制热效率影响的判别式。在带回热器和不带回热器两种情况下完成了跨临界CO2水源热泵系统的实验。实验结果表明:带回热器的跨临界CO2水源热泵系统的制热效率和制冷效率略高于不带回热器时系统的效率;带回热器时热泵系统的制热效率比不带回热器系统的制热效率高约4%-8%。
The influence on the C OPh of transcritical CO2 compression cycle was analyzed when internal heat exchanger was used.A criterion was presented.A comparison was made between two compression cycles,namely,the compression cycle with intenal heat exchanger(IHX) and the compression cycle without IHX.Experiment was made at different working conditions.Experimental results show IHX can improve C OP of transcritical CO2 heat pump system.Employment of IHX slightly increases the C OPh of the system by 4%-8%.