| Title |
Effects of Refrigerant Charge Amount on the Cooling Performance of a Transcritical CO2 Cycle |
| Keywords |
Carbon dioxide ; 이산화탄소 ; Refrigerant charge amount ; 냉매충전량 ; Entropy ; 엔트로피 ; COP ; 성능계수 ; Loss ; 손실 |
| Abstract |
The cooling performance of a transcritical CO2 cycle varies significantly with a variation of refrigerant charge amount. In this study, the performance of the CO2 system was measured and analyzed by varying refrigerant charge amount at a standard test condition. Besides, the losses of the major components in the CO2 system were estimated by evaluating entropy generation with refrigerant charge amount. The losses in the expansion device and the gascooler show the major portion of the total loss. For undercharging conditions, the expansion loss dominates the overall system performance, while the gascooler loss increases significantly with an increase of refrigerant charge amount. |