This paper is presenting the numerical investigation of the frosting behaviour of a heat pump evaporator in its full complexity, imitating the real-life operation of the experimental setup described in Part A of this publication. The backbone of this work represents the simulation framework for the selected algebraic frost growth model, with the novelty focused on its implementation into a 3D unstructured finite volume general purpose CFD code. The obtained frosting predictions, encompassing the frost growth and the related frost mass increase (responding through the model to the imposed evaporator wall temperature and ambient conditions) interlaced with the resulting change of the flow pattern, are achieving an average agreement within 10% in comparison to the experimental results. The presented modelling framework is applied to the geometrical entirety of the fin and tube evaporator of an air-source heat pump operating under experimentally monitored frosting conditions, and compared with the corresponding frosting results of the evaporator symmetric section, in order to provide the scaling correlation between the frosting characteristics of the full model and the extracted part.

本文展示了对热泵蒸发器结霜行为的完全复杂性的数值研究，模拟了本出版物 A 部分中描述的实验装置的实际操作。这项工作的主干代表了所选代数霜增长模型的模拟框架，其新颖之处在于其在 3D 非结构化有限体积通用 CFD 代码中的实现。获得的结霜预测，包括霜增长和相关的霜质量增加（通过模型响应施加的蒸发器壁温和环境条件）与由此产生的流动模式的变化交织在一起，相比之下，平均一致性在 10% 以内到实验结果。