| 房正达， 夏鹏， 李帅才， 陈俊宇.温湿度对铝表面水珠冻结影响的实验研究[J].轻工机械,2019,37(3):46-49 |
| 温湿度对铝表面水珠冻结影响的实验研究 |
| Experimental Study of Frozen Water Droplets on Aluminum Surface with Effects of Temperature and Humidity |
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| DOI：10.3969/j.issn.1005 2895.2019.03.009 |
| 中文关键词: 冷链运输 预冷却法 水珠冻结 显微成像 |
| 英文关键词:cold chain transport pre cooling method frozen of water droplets microscopic imaging |
| 基金项目:上海市重点课程建设项目（s201701001）；上海工程技术大学研究生课程建设项目（17XKC011）。 |
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| 中文摘要: |
| 水珠冻结导致换热器表面结霜会恶化传热效果，为了研究冷链运输过程中不同温湿度条件下铝表面水珠的微观生长和冻结
过程，课题组搭建了恒温恒湿结霜显微成像实验台，采用预冷却的方法，实验研究了以半导体制冷片为冷源的水平铝表面的水珠冻结情况。结果表明：在温度为
10~15 ℃时，冷表面结霜过程中冻结水珠的数量及冻结总时间随温度增加而减小；当相对湿度为50%~70%时，相对湿度为70%时的冻结水珠数量小于相对湿度为
50%时冻结水珠的数量，冷表面水珠冻结时间随湿度增加而减小。最后得出结论：温度升高时冻结时间减少是由表面张力减小带来的势垒减小导致，湿度增加时
冻结时间减少是由相变驱动力增加导致。 |
| 英文摘要: |
| The frost on the surface of the heat exchanger deteriorates the effect of heat transfer. In order to study the microscopic growth and freezing process
of water droplets on aluminum surface under different temperature and humidity conditions during cold chain transport，this article introduced the construction of constant temperature and
humidity frost microscopic imaging experimental table first，and then used the pre cooling method，experimentally studied the frozen of water droplets on the horizontal surface of
aluminum cooled by a semiconductor cooling device. The result shows that the amount of frozen water droplets and the total frozen time decrease with the increase of temperature in the
range of 10~15 ℃. When relative humidity is between 50% and 70%，the amount of frozen water droplets at 70% relative humidity is less than the amount of frozen water droplets at 50%
relative humidity，and the frozen time of cold water droplets decreases with the increase of humidity. It is concluded that the decrease of freezing time when the temperature increases is
caused by the decrease of the barrier caused by the decrease of surface tension. The decrease of the freezing time when the humidity increases is caused by the increase of the phase
transformation driving force. |
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