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UNIFAC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.
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