This study analyzes the energy and exergy of a small vapor compression system by retrofitting R410A working fluid with R290. The study was conducted on a split air conditioner by maintaining the air temperature through the condenser at 308 K and the air temperature through the evaporator at 300 K. The full charge amount of R410A was 340 g and the produced refrigerating capacity, power compressor, and coefficient of performance (COP) were 1899 W, 333 W, and 4.6, respectively. Subsequently, by varying the retrofit charging amount of R290, the optimum charging amount was obtained in the range of 45–55% from the full charge amount of R410A according to the COP and exergy efficiency; it exhibited the highest COP of 4.9. However, the refrigerating capacity and power consumption of the compressor decreased by 31.3 and 35.7%, respectively, compared with the system's condition of full charge amount R410A. Finally, the total exergy destruction and highest exergy efficiency were sequentially determined, where R410A exhibited 549.2 W and 0.26, and R290 exhibited 338 W and 0.21, respectively.

本研究通过使用R290改装R410A工作流体来分析小型蒸汽压缩系统的能量和火用。该研究是在分体式空调器上进行的，将通过冷凝器的空气温度保持在308 K，将通过蒸发器的空气温度保持在300K。R410A的满电量为340 g，产生的制冷量，功率压缩机和性能系数（COP）分别为1899 W，333 W和4.6。随后，通过改变R290的改型充电量，根据COP和火用效率，从R410A的满充电量获得的最佳充电量为45-55％。它展示了4.9的最高COP。但是，压缩机的制冷量和能耗分别下降了31.3和35.7％，与系统的完全充电量R410A的条件相比。最后，依次确定了总的火用破坏力和最高的火用效率，其中R410A分别显示549.2 W和0.26，R290分别显示338 W和0.21。