Nanoarray-Embedded Hierarchical Surfaces for Highly Durable Dropwise Condensation
Durable dropwise condensation of saturated vapor is of significance for heat transfer and energy saving in extensive industrial applications. While numerous superhydrophobic surfaces can promote steam condensation, maintaining discrete microdroplets on surfaces without the formation of a flooded fil...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Association for the Advancement of Science (AAAS)
2022-01-01
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| Series: | Research |
| Online Access: | http://dx.doi.org/10.34133/2022/9789657 |
| _version_ | 1797281011279593472 |
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| author | Yue Hu Kaili Jiang Kim Meow Liew Lu-Wen Zhang |
| author_facet | Yue Hu Kaili Jiang Kim Meow Liew Lu-Wen Zhang |
| author_sort | Yue Hu |
| collection | DOAJ |
| description | Durable dropwise condensation of saturated vapor is of significance for heat transfer and energy saving in extensive industrial applications. While numerous superhydrophobic surfaces can promote steam condensation, maintaining discrete microdroplets on surfaces without the formation of a flooded filmwise condensation at high subcooling remains challenging. Here, we report the development of carbon nanotube array-embedded hierarchical composite surfaces that enable ultra-durable dropwise condensation under a wide range of subcooling (ΔTsub=8 K–38 K), which outperforms existing nanowire surfaces. This performance stems from the combined strategies of the hydrophobic nanostructures that allow efficient surface renewal and the patterned hydrophilic micro frames that protect the nanostructures and also accelerate droplet nucleation. The synergistic effects of the composite design ensure sustained Cassie wetting mode and capillarity-governed droplet mobility (Bond number<0.055) as well as the large specific volume of condensed droplets, which contributes to the enhanced condensation heat transfer. Our design provides a feasible alternative for efficiently transferring heat in a vapor environment with relatively high temperatures through the tunable multiscale morphology. |
| first_indexed | 2024-03-07T16:49:24Z |
| format | Article |
| id | doaj.art-b248e0334c294a59b881a38e2bf59a51 |
| institution | Directory Open Access Journal |
| issn | 2639-5274 |
| language | English |
| last_indexed | 2024-03-07T16:49:24Z |
| publishDate | 2022-01-01 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | Article |
| series | Research |
| spelling | doaj.art-b248e0334c294a59b881a38e2bf59a512024-03-03T05:38:56ZengAmerican Association for the Advancement of Science (AAAS)Research2639-52742022-01-01202210.34133/2022/9789657Nanoarray-Embedded Hierarchical Surfaces for Highly Durable Dropwise CondensationYue Hu0Kaili Jiang1Kim Meow Liew2Lu-Wen Zhang3Department of Engineering Mechanics, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaState Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics & Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, ChinaDepartment of Architecture and Civil Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, China; Centre for Nature-Inspired Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, ChinaDepartment of Engineering Mechanics, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaDurable dropwise condensation of saturated vapor is of significance for heat transfer and energy saving in extensive industrial applications. While numerous superhydrophobic surfaces can promote steam condensation, maintaining discrete microdroplets on surfaces without the formation of a flooded filmwise condensation at high subcooling remains challenging. Here, we report the development of carbon nanotube array-embedded hierarchical composite surfaces that enable ultra-durable dropwise condensation under a wide range of subcooling (ΔTsub=8 K–38 K), which outperforms existing nanowire surfaces. This performance stems from the combined strategies of the hydrophobic nanostructures that allow efficient surface renewal and the patterned hydrophilic micro frames that protect the nanostructures and also accelerate droplet nucleation. The synergistic effects of the composite design ensure sustained Cassie wetting mode and capillarity-governed droplet mobility (Bond number<0.055) as well as the large specific volume of condensed droplets, which contributes to the enhanced condensation heat transfer. Our design provides a feasible alternative for efficiently transferring heat in a vapor environment with relatively high temperatures through the tunable multiscale morphology.http://dx.doi.org/10.34133/2022/9789657 |
| spellingShingle | Yue Hu Kaili Jiang Kim Meow Liew Lu-Wen Zhang Nanoarray-Embedded Hierarchical Surfaces for Highly Durable Dropwise Condensation Research |
| title | Nanoarray-Embedded Hierarchical Surfaces for Highly Durable Dropwise Condensation |
| title_full | Nanoarray-Embedded Hierarchical Surfaces for Highly Durable Dropwise Condensation |
| title_fullStr | Nanoarray-Embedded Hierarchical Surfaces for Highly Durable Dropwise Condensation |
| title_full_unstemmed | Nanoarray-Embedded Hierarchical Surfaces for Highly Durable Dropwise Condensation |
| title_short | Nanoarray-Embedded Hierarchical Surfaces for Highly Durable Dropwise Condensation |
| title_sort | nanoarray embedded hierarchical surfaces for highly durable dropwise condensation |
| url | http://dx.doi.org/10.34133/2022/9789657 |
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