
Effects of vapor injection techniques on the heating performance of a CO2 heat pump at low ambient temperatures
Keywords: دو مرحله ای; CO2 heat pump; Compressor frequency; Heating performance; Injection ratio; Two-stage; Vapor injectionPompe à chaleur au CO2; Fréquence du compresseur; Performance de chauffage; Taux d' injection; Biétagé; Injection de vapeur