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。

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.

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本文实地调研了冻结物冷藏间冷却排管的结霜速度和相应的霜层密度及影响结霜速度的主要因素。

The speed that frost forms on the surface of coil pipe in cold storage and the factors that mainly affect the frost forming speed is investigated here.

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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。

Establishes a mathematic model, taking into account the variation of frost density and the decrease of airflow rate caused by frost layer.

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