Experimental Study on Frost Crystal Morphologies and Frosting Characteristics under Different Working Pressures
Frost usually grows on the cooling surface of heat transfer equipment, which often operates under different working pressures. In such conditions, one of the fundamental influencing factors of frosting, the diffusion coefficient of water vapor around the cooling surface, is different from that in th...
| 出版年: | Applied Sciences |
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| 主要な著者: | , , , , , |
| フォーマット: | 論文 |
| 言語: | 英語 |
| 出版事項: |
MDPI AG
2022-04-01
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| 主題: | |
| オンライン･アクセス: | https://www.mdpi.com/2076-3417/12/8/4025 |
| _version_ | 1851924972835962880 |
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| author | Tianwei Lai Xue Liu Xiaojun Dong Mingchen Qiang Shaohang Yan Yu Hou |
| author_facet | Tianwei Lai Xue Liu Xiaojun Dong Mingchen Qiang Shaohang Yan Yu Hou |
| author_sort | Tianwei Lai |
| collection | DOAJ |
| container_title | Applied Sciences |
| description | Frost usually grows on the cooling surface of heat transfer equipment, which often operates under different working pressures. In such conditions, one of the fundamental influencing factors of frosting, the diffusion coefficient of water vapor around the cooling surface, is different from that in the normal atmosphere pressure. In order to investigate the pressure effect on frosting, a test rig for frosting visualization is designed. The role of working pressure around the cooling surface on the frost crystal morphologies and frost layer characteristics is evaluated under different air parameters and temperatures of cooling surface. The vertical growth and lateral distribution of frost crystals are strongly related to working pressure around the cooling surface. More frost crystal morphologies and faster growth rate of frost layer are presented at a lower pressure. The frost thickness, frost accumulation and density reduce with higher pressure. The dimensionless correlation of frost thickness is proposed considering working pressure around the cooling surface, humid air parameters, and temperature of cooling surface. |
| format | Article |
| id | doaj-art-3b5a7b2bd8f24924b37b571c41e6083f |
| institution | Directory of Open Access Journals |
| issn | 2076-3417 |
| language | English |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| spelling | doaj-art-3b5a7b2bd8f24924b37b571c41e6083f2025-08-19T21:56:52ZengMDPI AGApplied Sciences2076-34172022-04-01128402510.3390/app12084025Experimental Study on Frost Crystal Morphologies and Frosting Characteristics under Different Working PressuresTianwei Lai0Xue Liu1Xiaojun Dong2Mingchen Qiang3Shaohang Yan4Yu Hou5State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaFrost usually grows on the cooling surface of heat transfer equipment, which often operates under different working pressures. In such conditions, one of the fundamental influencing factors of frosting, the diffusion coefficient of water vapor around the cooling surface, is different from that in the normal atmosphere pressure. In order to investigate the pressure effect on frosting, a test rig for frosting visualization is designed. The role of working pressure around the cooling surface on the frost crystal morphologies and frost layer characteristics is evaluated under different air parameters and temperatures of cooling surface. The vertical growth and lateral distribution of frost crystals are strongly related to working pressure around the cooling surface. More frost crystal morphologies and faster growth rate of frost layer are presented at a lower pressure. The frost thickness, frost accumulation and density reduce with higher pressure. The dimensionless correlation of frost thickness is proposed considering working pressure around the cooling surface, humid air parameters, and temperature of cooling surface.https://www.mdpi.com/2076-3417/12/8/4025frostingpressurefrost crystal morphologyfrost layer characteristiccorrelation |
| spellingShingle | Tianwei Lai Xue Liu Xiaojun Dong Mingchen Qiang Shaohang Yan Yu Hou Experimental Study on Frost Crystal Morphologies and Frosting Characteristics under Different Working Pressures frosting pressure frost crystal morphology frost layer characteristic correlation |
| title | Experimental Study on Frost Crystal Morphologies and Frosting Characteristics under Different Working Pressures |
| title_full | Experimental Study on Frost Crystal Morphologies and Frosting Characteristics under Different Working Pressures |
| title_fullStr | Experimental Study on Frost Crystal Morphologies and Frosting Characteristics under Different Working Pressures |
| title_full_unstemmed | Experimental Study on Frost Crystal Morphologies and Frosting Characteristics under Different Working Pressures |
| title_short | Experimental Study on Frost Crystal Morphologies and Frosting Characteristics under Different Working Pressures |
| title_sort | experimental study on frost crystal morphologies and frosting characteristics under different working pressures |
| topic | frosting pressure frost crystal morphology frost layer characteristic correlation |
| url | https://www.mdpi.com/2076-3417/12/8/4025 |
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