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综合考虑工质热力学性质及环境友好性等多方面因素,提出将非共沸混和制冷剂HFC32+HFC227ea替代HCFC22用于吸收式制冷系统。用UNIEAC模型确定组分活度系数,在质量守恒、能量守恒及相平衡原理基础上,对HFC32+HFC227ea/DMF新型吸收式制冷循环性能随工况的变化进行了理论分析,并与HCFC22/DMF循环进行比对。结果表明,当HFC32和HFC227ea以适当比例混合用于吸收式制冷循环时,完全能达到HCFC22所能达到的性能。
Considering the thermodynamic properties and environmental friendliness of the working fluid and other factors, it is proposed to use the non-azeotropic refrigerant HFC32 + HFC227ea instead of HCFC22 for the absorption refrigeration system. Based on the principle of conservation of mass, conservation of energy and phase equilibrium, the performance of new absorption refrigeration cycle of HFC32 + HFC227ea / DMF with the change of operating conditions was theoretically analyzed and compared with that of HCFC22 / DMF Loop to align. The results show that when HFC32 and HFC227ea mixed in an appropriate ratio for the absorption refrigeration cycle, can fully achieve the performance of HCFC22 achieved.