The frost growth on copper plate surface under electric field was observed in this thesis . we found that the applied electric field may change the shape of frost crystals , control the frost layer 通过研究电场作用下亲水表面上霜层的生长,发现亲水表面比紫铜表面能够更好地抑制霜层厚度,但使结霜质量增加。
Frost accumulation has a severe negative effect on refrigeration , cryogenic and many other engineering systems due to the increased flow and heat transfer resistance and the reduced energy transfer rate 由于霜层会增加传热热阻、降低能量的传递速率,因此结霜现象对于制冷、低温和航天技术的影响十分严重。
Because of the larger contact angle 9 of low - energy surface , the phase transformation energy barrier of vapor is higher than those of high - energy surface , and the frosting of air cooler is effectively restrained ; 3 低能表面因水接触角大，水蒸气相变时的核化能障较大，从而有效地抑制了蒸发器的结霜。
Abstract : the paper presents a experimental study on thermal conductivity of frost formation through sublimation of water vapor . the experinmentals shows the results in reference 4 is curect 文摘:实验研究水蒸汽凝华结霜过程中在冷壁面上形成的霜层的导热系数，并以此验证作者曾提出的霜层导热系数的理论结果
In this paper , according to relevant literatures , the author reviewed theories of recent years about frosting , anti - frosting and defrosting of air cooler and came to the following conclusions : 1 本文根据众多的文献资料，回顾了多年来在空气冷却器结霜、抑霜、除霜等方面的理论和实验研究，得出如下结论： 1
In order to seek the effective defrosting and frost - controlling methods , frost growth on hydrophilic surface under natural conditions with and without the existence of external electric field were investigated in this thesis 本文主要研究亲水表面结霜和外加电场对霜的生长的影响,力求寻找一种既经济又节约能源的抑霜方法。
The simulation results indicated that the air flow , airside pressure drop , water flow and flux of heat exchange in water side decreased with the increase of frosting time , and the airside pressure increased 模拟结果表明，随着结霜量的增加，空气侧换热器的换热量减小，风量也将逐渐减小，而阻力却迅速增加；水侧换热器的换热量减小，水流量也减小。
The performances such as air flow , airside pressure drop , waterside heat exchange and power consumed by compressor vs . frosting time under different condition , were simulated and analyzed by using the ashpwch model developed 采用该模型对机组在不同工况下的性能进行了模拟分析，得到了风量、空气侧压降以及水侧换热器换热量、压缩机的轴功率等随结霜时间的变化。
The good comparisons between simulations and experiments show that the system simulation model is valid in the research on the dynamic characteristics of ashp and the mentioned method of calculation is available in the simulation 仿真结果和实验结果的比较表明本研究所提出仿真模型能反映空气源热泵机组结霜和除霜过程中系统的本质特性，仿真计算的实践表明所提出的仿真计算方法是行之有效的。
