对高湿地区风冷热泵蒸发器结霜过程进行了理论分析及实验测试。
The theoretical analysis and experimental measurements of frosting process of air-cooled heat pump evaporator in high humidity district are conducted.
在本文中，作者建立了翅片式蒸发器的分布参数模型，用以模拟结霜过程。
In this paper, the distributed parameter model of a finned evaporator is established to simulate the frosting process.
进一步研究了在结霜过程中空气冷却器的传热面积、传热系数以及空气侧压降与霜层生长的变化关系。
Through expounding the calculation process of the external wall, roofing, floor and door and window heat transmission coefficient, the article investigates the energy-savingc alculation.
进一步研究了在结霜过程中空气冷却器的传热面积、传热系数以及空气侧压降与霜层生长的变化关系。
Theoretical analysis using the method of energy equilibrium in covering layer and validation of the overall heat transfer coefficient of greenhouse covering materials;
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。
Establishes a dynamic lumped parameter model for air cooled heat pump under frosting condition. Divides frosting course into accumulation of density and frost thickness.
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.
目前在风冷热泵机组的仿真研究中，对蒸发器结霜过程的模拟主要是采用一些由实验拟合而成的集总参数模型，而这些模型往往是在特定的运行条件下得到的。
At present, the lumped parameter model of frost, which is based on experience and depend heavenly on the running condition, is widely used in simulation of air-cooled heat pump.
但是，在冬季供暖过程中，蒸发器结霜的问题一直没有得到很好的解决。
But during the heating in winter, the problem of frosting in evaporator is not well settled at all times.
低温工况下翅片管换热器的结霜是一个复杂的热质传递过程。
Frosting of finned tube heat exchangers is a complex process of heat and mass transfer under low temperature conditions.
以蒸汽分子扩散模型为基础，建立了预测霜层生长过程的数学模型，并建立了以液氮为冷媒的管内强制流动结霜实验台。
Based on molecular diffusion model of water vapor a theoretical model of frost growth is established and an experimental set with a liquid nitrogen cooled tube is built up.
油气嘴节流现象广泛存在于油气田开发生产过程中，严重者可以导致冰冻结霜或者生成水和物导致作业失败。
Throttling phenomena often happens at development and production operation period of oil and gas field which results in frost or produced hydrate in some serious cases to cause failure of work.
油气嘴节流现象广泛存在于油气田开发生产过程中，严重者可以导致冰冻结霜或者生成水和物导致作业失败。
Throttling phenomena often happens at development and production operation period of oil and gas field which results in frost or produced hydrate in some serious cases to cause failure of work.
应用推荐