液体混合物过热极限的理论探讨及其预测

Theoretical study and prediction of the superheat limits of liquid mixtures

根据稳定性原理 ,用热力学方法探讨了液体混合物的稳定性 ,发现液体混合物过热极限对比温度与对比压力间存在着普适规律 ,据此提出一种计算液体混合物过热极限的理论方法和用于化工计算的简便方法 .对二元液体混合物和三元液体混合物的 2 93个数据点的计算结果表明 ,液体混合物过热极限预测值与实验值的一致性令人满意 .

Based on the thermodynamics, the stability of liquid mixtures was studied, and a new method was proposed to calculate the superheat limits of liquid mixtures. The results showed that there was a universal relation between reduced temperature and reduced pressure of superheat limits of liquid mixtures. A method was proposed to predict the superheat limits of liquid mixtures. The predicted superheat limits of liquid mixtures for 28 kinds of binary mixtures and ternary mixtures with 293 data points were in good agreement with the experimental data, the mean relative deviation was 1.48%.