自然对流下亲水表面上抑霜的研究

EXPERIMENTAL STUDY OF RESTRAINING FROST FORMATION ON HYDROPHILIC SURFACE UNDER NATURAL CONVECTION CONDITIONS

本文用自行研制的强吸水性涂料制作了亲水表面,并在其上进行了结霜研究。在不同实验条件下进行了吸水表面与普通金属表面上的霜厚及霜表面温度的测量、对比,并研究了影响亲水表面结霜的因素。结果表明,这种涂层具有明显的抑霜效果,在较易结霜的实验条件下可使初始霜晶出现时间延迟15分钟以上,在低于冰点的一定范围内,可以使初始霜晶出现的时间延迟3小时以上,霜厚减少40%以上,霜表面温度低且霜层疏松,在外力的作用下很容易除去。

A new paint which can absorb a large amount of water was developed for restraining frost formation, hydrophilic surface was made using this paint. A series of experiments were carried out, frost thickness and frost surface temperature were measured and compared on the hydrophilic surface and metallic surface, and the main factors that affect frost formation on hydrophilic surface were studied. Experimental results showed this kind of hydrophilic surface can release frost growth very effectively, the onset of the frost formation can be retarded more than 15 minutes under the conditions that frost formed easily, within some certain conditions below the freezing point, there were no frost crystals formed for at least 3 hours, frost thickness greatly reduced by 40were looser and stronger on the hydrophilic surface than on the metallic surface, and thus they can be removed by external force more easily.