Cold Climate Air-Source Heat Pumps Performance Improvement by Refrigerant Mixtures

This paper aims to address the challenge of improving the performance of Heat Pumps (HPs) in cold climate condition by applying refrigerant mixtures . Thepotential benefits of implementing R32/CO2 zeotropic refrigerant mixtures in three different residential airsource HPs for cold climates is studied. The casesstudied are: conventional residential HP, HP with variable mixture control system and HP with variable compressor speed. The seasonal performance of aheating system with these air-source HPs, supplemented with an auxiliary electric heater is studied in the cold climate city of Montreal. To thisaim, a detailed screening HP model previously developed is modified and used. The obtained results highlight the potential HP performance improvement of applying refrigerant mixtures .

کلیدواژه ها:

Heat pump ، zeotropic mixture ، air-source ، cold climate ، variable mixture composition ، variable speed compressor