Technical-grade and mixed solid/liquid phase change materials (PCM) typically melt and solidify over a temperature range, sometimes exhibiting thermal hysteresis. Three phenomenological phase transition models are presented which are directly parametrized using data from complete melting and solidification experiments. They predict hysteresis phenomena and are used to calculate effective PCM properties. Two models have already been implemented in commercial building simulation and/or multiphysics software, but not the third novel model. Applications are presented for two commercial PCM: a paraffin, and a salt water mixture with additives. Numerical implementation aspects are discussed, and significant differences in the predicted absorbed and released heat are highlighted when simulating consecutive incomplete phase transitions. The models are linked with energy balance equations to predict recorded PCM temperatures of a thermal energy storage. The cross-validation with data from 26 partial load conditions clearly indicate a superior predictive performance of the novel hysteresis model.

工业级和混合的固/液相变材料（PCM）通常在一定温度范围内熔化并固化，有时会出现热滞现象。提出了三种现象学的相变模型，这些模型使用来自完全熔融和凝固实验的数据直接进行参数化。它们预测磁滞现象，并用于计算有效的PCM特性。在商业建筑模拟和/或多物理场软件中已经实现了两种模型，但是没有第三种新颖的模型。提出了两种商用PCM的应用：石蜡和带有添加剂的盐水混合物。讨论了数值实现方面，并在模拟连续的不完全相变时突出了预测的吸收热量和释放热量的显着差异。这些模型与能量平衡方程式关联，以预测所记录的热能存储器的PCM温度。与来自26个部分负荷条件的数据的交叉验证清楚地表明了新型磁滞模型的优异预测性能。