Efficient defrosting on hybrid surfaces with heterogeneous wettability
Frosting behavior and dynamic defrosting characteristics of horizontally oriented hybrid surfaces with heterogeneous wettability were experimentally investigated. The developed hybrid surfaces with superhydrophobic patterns built on superhydrophilic background integrated the properties of frost reta...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23003052 |
| _version_ | 1797832698953203712 |
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| author | Hai Wang Fan Zhang Junfeng Wang Zhentao Wang Haojie Xu Wei Zhang |
| author_facet | Hai Wang Fan Zhang Junfeng Wang Zhentao Wang Haojie Xu Wei Zhang |
| author_sort | Hai Wang |
| collection | DOAJ |
| description | Frosting behavior and dynamic defrosting characteristics of horizontally oriented hybrid surfaces with heterogeneous wettability were experimentally investigated. The developed hybrid surfaces with superhydrophobic patterns built on superhydrophilic background integrated the properties of frost retardation under frosting conditions and fast surface cleaning of residual water upon defrosting. Four types of hybrid surfaces with different pattern spacings were tested in this work. Hybrid surfaces exhibited superior anti-frosting performance compared with that of a bare copper surface but lower than a complete superhydrophobic surface. During defrosting process, surface energy gradient and Laplace pressure gradient enabled by heterogeneous wettability on hybrid surfaces could drive the mobile slush composites on superhydrophobic regions move to superhydrophilic areas to achieve quick cleaning even in the absence of gravity force. The proportion of surface clean time of one full cycle duration on hybrid surfaces was as low as 32.2%–41.5%. Compared to complete superhydrophobic and bare copper surfaces, hybrid surfaces exhibited a significant enhancement on defrost efficiency due to larger three phase contact line length on evaporation-mediated surface cleaning performance, especially the SSH-3 surface, achieving the largest defrost efficiency within the present frost mass range. |
| first_indexed | 2024-04-09T14:13:07Z |
| format | Article |
| id | doaj.art-6edf72bc058a47f5a45ccc591de66e53 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-04-09T14:13:07Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-6edf72bc058a47f5a45ccc591de66e532023-05-06T04:38:12ZengElsevierCase Studies in Thermal Engineering2214-157X2023-05-0145102999Efficient defrosting on hybrid surfaces with heterogeneous wettabilityHai Wang0Fan Zhang1Junfeng Wang2Zhentao Wang3Haojie Xu4Wei Zhang5Corresponding author.; School of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, PR ChinaSchool of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, PR ChinaCorresponding author.; School of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, PR ChinaSchool of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, PR ChinaSchool of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, PR ChinaSchool of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, PR ChinaFrosting behavior and dynamic defrosting characteristics of horizontally oriented hybrid surfaces with heterogeneous wettability were experimentally investigated. The developed hybrid surfaces with superhydrophobic patterns built on superhydrophilic background integrated the properties of frost retardation under frosting conditions and fast surface cleaning of residual water upon defrosting. Four types of hybrid surfaces with different pattern spacings were tested in this work. Hybrid surfaces exhibited superior anti-frosting performance compared with that of a bare copper surface but lower than a complete superhydrophobic surface. During defrosting process, surface energy gradient and Laplace pressure gradient enabled by heterogeneous wettability on hybrid surfaces could drive the mobile slush composites on superhydrophobic regions move to superhydrophilic areas to achieve quick cleaning even in the absence of gravity force. The proportion of surface clean time of one full cycle duration on hybrid surfaces was as low as 32.2%–41.5%. Compared to complete superhydrophobic and bare copper surfaces, hybrid surfaces exhibited a significant enhancement on defrost efficiency due to larger three phase contact line length on evaporation-mediated surface cleaning performance, especially the SSH-3 surface, achieving the largest defrost efficiency within the present frost mass range.http://www.sciencedirect.com/science/article/pii/S2214157X23003052DefrostingWater retentionHeterogeneous wettabilityHybrid patterned surfacesEvaporation |
| spellingShingle | Hai Wang Fan Zhang Junfeng Wang Zhentao Wang Haojie Xu Wei Zhang Efficient defrosting on hybrid surfaces with heterogeneous wettability Case Studies in Thermal Engineering Defrosting Water retention Heterogeneous wettability Hybrid patterned surfaces Evaporation |
| title | Efficient defrosting on hybrid surfaces with heterogeneous wettability |
| title_full | Efficient defrosting on hybrid surfaces with heterogeneous wettability |
| title_fullStr | Efficient defrosting on hybrid surfaces with heterogeneous wettability |
| title_full_unstemmed | Efficient defrosting on hybrid surfaces with heterogeneous wettability |
| title_short | Efficient defrosting on hybrid surfaces with heterogeneous wettability |
| title_sort | efficient defrosting on hybrid surfaces with heterogeneous wettability |
| topic | Defrosting Water retention Heterogeneous wettability Hybrid patterned surfaces Evaporation |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23003052 |
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