In this study, experimental investigations of solid-liquid phase diagram of binary and ternary mixtures formed by the C₁₁H₂₄, C₁₂H₂₆ and C₁₄H₃₀ were carried out to employ the potential phase change materials (PCMs) for cryogenic applications using the differential scanning calorimetry (DSC). In addition, the thermodynamic equilibrium was modeled employing the ideal model, and the Wilson and NRTL model were applied to correlate the liquidus line. The results show that the C₁₁-C₁₂ system exhibits a peritectic transition and the composition of possibly peritectic point is 60wt% C₁₂ with the temperature of 251.65 K. The compositions of the eutectic points appear at 10wt% C₁₄ for C₁₁-C₁₄ system and 18wt% C₁₄ for C₁₂-C₁₄ system with eutectic temperatures of 246.85 K and 260.45 K, respectively. The C₁₁-C₁₂-C₁₄ ternary system presents two possibly eutectic points at compositions of 67wt% C₁₁/5wt% C₁₂ and 86wt% C₁₁/10wt% C₁₂ with eutectic temperatures of 246.45 K and 248.05 K, and has the slight supercooling (1.7 ˚C and 0.5 ˚C), indicating miscibility in liquid phase and immiscibility in solid phase. Moreover, the liquidus lines calculated by the theoretical models are in good agreement with the experimental results. The best predicted results of the ternary mixture and C₁₁-C₁₂ binary subsystem are obtained by the ideal model, with deviations of 0.75% and 0.58% respectively.

在这项研究中，对由C ₁₁ H ₂₄，C ₁₂ H ₂₆和C ₁₄ H ₃₀形成的二元和三元混合物的固液相图进行了实验研究，以将潜在的相变材料（PCM）用于低温应用使用差示扫描量热法（DSC）。此外，使用理想模型对热力学平衡进行建模，并使用Wilson和NRTL模型来关联液相线。结果表明，C ₁₁ -C ₁₂体系表现出包晶转变，可能包晶点的组成为60 wt％C ₁₂温度为251.65K。共晶点的组成分别出现在C ₁₁ -C ₁₄体系的10 wt％C ₁₄和C ₁₂ -C ₁₄体系的18 wt ％C _14上，共晶温度为246.85 K和260.45K。C ₁₁ -C ₁₂ -C ₁₄三元体系在67wt％C ₁₁ / 5wt％C ₁₂和86wt％C ₁₁ / 10wt％C _12的组成中表现出两个可能的共晶点。其共晶温度为246.45 K和248.05 K，并且略有过冷（1.7˚C和0.5˚C），表明在液相中可混溶，在固相中不可混溶。此外，理论模型计算出的液相线与实验结果吻合良好。通过理想模型可以获得三元混合物和C ₁₁ -C ₁₂二元子系统的最佳预测结果，其偏差分别为0.75％和0.58％。