本文讨论了在寒冷气候条件下，通过使用制冷剂混合物来改善热泵（HPs）性能的挑战。研究了在寒冷气候条件下，在三种不同的住宅空气源HPs中使用R-32/CO2共沸制冷剂混合物的潜在好处。所考虑的情况包括常规家用高压、带有可变混合气控制系统的高压和带有可变压缩机转速的高压。在加拿大寒冷气候城市蒙特利尔，研究了带有这些空气源HPs的供暖系统的季节性性能，以及辅助电加热器。为此，对之前开发的详细筛选HP模型进行了修改和使用。获得的结果突出了应用制冷剂混合物的HP性能的潜在改善。 引用:2016年年度会议，密苏里州圣路易斯，2016年交易，第122卷。2.

This paper addresses the challenge of improving the performance of heat pumps (HPs) in cold-climate conditions by applying refrigerant mixtures. The potential benefits of implementing R-32/CO2zeotropic refrigerant mixtures in three different residential air-source HPs for cold climates are studied. The cases considered are conventional residential HP, HP with a variable mixture control system, and HP with a variable compressor speed. The seasonal performance of a heating system with these air-source HPs, supplemented with an auxiliary electric heater, is studied in the cold-climate city of Montreal, Canada. To this aim, a detailed screening HP model previously developed is modified and used. The obtained results highlight the potential HP performance improvement of applying refrigerant mixtures.