根据前人对有机Rankine循环和吸收式制冷循环的研究,本文选出了一组有潜力的吸收式动力循环工质R245fa+DMF.利用外循环可视汽液相平衡(VLE)测定装置,本文测定了温度293.15～353.15K,压力15～700 kPa条件下R245fa+DMF体系的VLE数据.利用逸度系数法中的PR、SRK状态方程,活度系数法中的NRTL、Wilson模型,本文对体系的VLE数据进行了关联.偏差评价表明,NRTL模型能够较好描述该体系在实验温度压力下的VLE数据.从p-x图上可以看出,该体系呈现对Raoult定律较强的负偏差,显示R245fa和DMF具有很好的亲和性.因此,R245fa+DMF的组合具有成为吸收式动力循环工质对的潜力.
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