This   paper   gave   a   schematic   of   the   CO2 transcritical cycle for ground source heat pump system and compared it with the cycles of R22 and R134a.The volumetric  efficiency  and  isentropic  efficiency  is  also taken   into   consideration   in   this   comparison.   The results  indicated  that  CO2  ground  source  heat  pump system  is  equivalent  to  the  conventional  refrigerants cycles    in    coefficient    of    performance    in    high temperature   heat   sink.   The   paper   analyzed   the operating  characteristics  of  CO2  ground  source  heat pump  system  when  both  the  temperature  and  the  flow of water are changed and also discussed the capacity control methods of the CO2 ground source heat pump system.
['Jinggang Wang', 'Ligai Kang', 'Jie Liu']
CO2 Transcritical Cycle for Ground Source Heat Pump