【摘要】 为了提高空气源热泵供热的实时系统能效，本文从热泵系统制冷剂循环和水循环两方面考虑，提出了气液耦合喷射的准二级压缩技术和大温差热泵技术，前者通过调节制冷剂循环流量提高机组能效，而后者则是增大机组进出水温差，减小水流量，降低输配系统能耗占比，从而提高系统整体能效，并对上述两种技术进行了实验研究，结果表明：气液耦合喷射热泵系统比补气增焓热泵系统具有更好的低温适应性，由于制冷剂循环流量增加而制热能力和能效均有所提高，分别提高约5%和6.95%。相比于小温差（5℃），大温差（15℃）热泵技术可以使水泵在供热系统中的能耗占比降低70%以上，系统全年制热季能效提升了16.1%～24.4%。更多还原

【Abstract】 In order to solve the above problems, the quasi-two-stage compression technology based on gas-liquid coupling injection(GLCI) and the heat pump with large temperature difference technology are proposed in this paper from the aspects of refrigerant cycle and water cycle of air source heat pump heating system. The former improves the energy efficiency of heat pump unit by regulating the mass flow rate of refrigerant, while the latter improves the overall energy efficiency of heating system by increasing the water temperature difference between the inlet and outlet of heat pump units, which could reduce the energy consumption of conveying system by decreasing water mass flowrate. The experimental study on the above two technologies shows that the GLCI system has better adaptability in low ambient temperature than the enhanced vapor injection system, and the heating capacity and coefficient of performance(COP) are improved by 5% and 6.95% respectively due to the increase of refrigerant circulation flow rate. Compared with small temperature difference(5 ℃), the large temperature difference heat pump technology(15 ℃) can reduce the proportion of water pump energy consumption in heating systems by more than 70%, and increase the heating season performance factor(HSPF) by 16.1%～24.4%.更多还原