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首页> 外文会议>10th international conference on phase change materials and slurries for refrigeration and air conditioning >A NEW DEFROSTING METHOD FOR UTILIZATION OF FROST
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A NEW DEFROSTING METHOD FOR UTILIZATION OF FROST

机译：一种利用冰霜除霜的新方法

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摘要

When a solid surface is cooled below the solidification temperature of water, vapor condenses onrnthe solid surface forming frost. The frost formation is a transient phenomenon where heat and massrntransfer take place simultaneously. Frost formation can often lead to a deterioration of the performancernof consumer products such as refrigerators and heat pumps. Generally, defrosting is carriedrnout by melting the frost on the heat exchangers of the devices periodically. Here, we propose a newrnmechanical method in which the heat exchangers can still maintain their low temperatures whilerndefrosting. Therefore, not only that the overall efficiency of the heat exchangers can be improved,rnbut also the frost crystals removed can be utilized as a regenerative material. Frost formation processrnconsists of two stages: the crystallization of frost and growth of the frost layer, which dependrnon environmental and surface-related factors. In this study, we investigated the effect of the coolingrnsurface characteristics on the amount of frost formed and frost layer thickness. To evaluate thernfrosting process, we used in this experimental investigation a new parameter, which is the forcernrequired scrap off the frost from the cooling surface. In addition, we investigated the recyclability ofrnthe frost crystals removed, as ice.
机译：当将固体表面冷却至低于水的凝固温度时，蒸汽在固体表面上凝结形成霜。霜的形成是一个瞬态现象，热量和传质同时发生。霜的形成通常会导致诸如冰箱和热泵之类的消费产品的性能下降。通常，通过周期性地融化装置的热交换器上的霜来进行除霜。在这里，我们提出了一种新的机械方法，其中换热器在除霜时仍可以保持其低温。因此，不仅可以提高热交换器的整体效率，而且可以将去除的霜晶体用作再生材料。霜的形成过程包括两个阶段：霜的结晶和霜层的生长，这取决于环境和表面相关因素。在这项研究中，我们研究了冷却表面特性对霜形成量和霜层厚度的影响。为了评估结霜过程，我们在本实验研究中使用了一个新参数，即从冷却表面上除霜所需的力。此外，我们还研究了去除的霜晶体（如冰）的可回收性。

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