TY - JOUR TT - The Effect of Refrigerant Outlet Temperature for Exergy Efficiency of Heat Pumps Using CO2 AU - Özgür, Arif Emre AU - Bayrakçı, Hilmi Cenk PY - 2010 DA - March JF - Isı Bilimi ve Tekniği Dergisi PB - Türk Isı Bilimi ve Tekniği Derneği WT - DergiPark SN - 1300-3615 SP - 73 EP - 78 VL - 30 IS - 1 KW - CO2 KW - Kritik nokta KW - Isı pompası KW - Ekserji KW - Verim N2 - Because of the global warming, usage of natural refrigerants is being common in large scale. CO2 cooling systems especially preferred at vehicle air conditioners and hot water heat pump applications. In this study, a single stage heat pump using CO2 refrigerant and having transcritical cycle is theoretically modeled. The effect of gas cooler outlet temperature for exergetic efficiency of heat pump is presented. Range of evaporating temperature is selected between -10 and +10 oC values. Calculations are made by software (EES-Engineering Equation Solver), and results are presented graphically UR - https://dergipark.org.tr/tr/pub/isibted/issue//375573 L1 - https://dergipark.org.tr/tr/download/article-file/399907 ER -