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。
Establishes a dynamic lumped parameter model for air cooled heat pump under frosting condition. Divides frosting course into accumulation of density and frost thickness.
建立了结霜工况下空气源热泵集中动态参数模型，将结霜过程分解成密度项的累计和霜层厚度项的累计。
Early and late frost, Dedrolimus superans, sawfly and needle cast of larch could reduce the quality and quantity of foods of larch casebearer and had indirect effects on its population density.
早霜、晚霜、松毛虫、叶蜂及落叶松早期落叶病等都能直接影响鞘蛾食物的质量和数量，进而间接地使鞘蛾种群密度降低。
The effects of the outdoor air temperature and humidity on the frost morphology and density of the frost layer were analyzed.
对一台空气源热泵翅片管蒸发器表面结霜特性进行了实验研究，分析了室外环境温度和相对湿度对霜层形态和密度的影响。
The effects of the outdoor air temperature and humidity on the frost morphology and density of the frost layer were analyzed.
对一台空气源热泵翅片管蒸发器表面结霜特性进行了实验研究，分析了室外环境温度和相对湿度对霜层形态和密度的影响。
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