Experimental study on frost release on fin-and-tube heat exchangers by use of a novel anti-frosting paint |
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Authors: | Lingyan Huang Zhongliang Liu Yaomin Liu Yujun Gou Jieteng Wang |
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Institution: | aKey Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education and Key Laboratory of Heat Transfer and Energy Conversion, Beijing Education Commission, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, PR China |
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Abstract: | Frost formation on heat exchangers is an undesirable phenomenon that almost inevitably exists in refrigeration and cryogenic equipment; it can significantly affect the thermal efficiency of heat exchangers and reduce the performance of the refrigeration system. In this paper, a newly developed anti-frosting paint was used to spray on the heat exchanger fins with coating thickness of 30 μm, and a series of comparative experiments were conducted to test its effectiveness in restraining frost deposition under different repeated frosting–defrosting cycles. The experimental results demonstrated that the anti-frosting time of the coated heat exchanger was substantially longer when compared with the uncoated heat exchanger. In addition, there was no appreciable frost deposition on the coated fins surface during the whole test. |
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Keywords: | Frost formation Hydrophilic paint Frost release Experimental |
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