Establishes a mathematic model, taking into account the variation of frost density and the decrease of airflow rate caused by frost layer.
针对平肋肋片管式换热器的结霜过程，建立了数学模型，考虑了霜层密度变化和霜层阻力引起空气流量减小等因素。
Under the conditions of the high air temperature and humidity, the average frost density is raised significantly due to the appearance of the water droplet on the frost layer surface.
而对高温、高湿度工况，霜层表面出现了首先形成凝结水滴的现象，使得霜层密度大大增加。
The equations feature variable frost density. Meanwhile mass transfer coefficients used in prediction are derived from the published experiment data, which used to be based on Lewis analogy.
在支配方程推导及求解过程中，采用了霜层变密度分析并引入了据试验数据拟合的传质系数。
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