Frosting and defrosting characteristics of multi-layer coated aluminum surfaces
- Authors
- Yang, Jung Bin; Jeon, Jaehyeon; Lee, Hyeonho; Heu, Chang Sung; Kim, Dong Rip
- Issue Date
- Dec-2022
- Publisher
- Elsevier Ltd
- Keywords
- Frosting; Defrosting; Frost retardation; Superhydrophobic; Superhydrophilic
- Citation
- International Communications in Heat and Mass Transfer, v.139, pp.1 - 8
- Indexed
- SCIE
SCOPUS
- Journal Title
- International Communications in Heat and Mass Transfer
- Volume
- 139
- Start Page
- 1
- End Page
- 8
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/185330
- DOI
- 10.1016/j.icheatmasstransfer.2022.106460
- ISSN
- 0735-1933
- Abstract
- Delaying frost formation and shortening defrosting time were both of importance to enhance anti-frosting characteristics. To achieve those, functional multi-layers with a total thickness of <20 μm were successfully integrated over aluminum substrates by sequentially depositing a bottom electrical insulating layer, a middle heating layer, and a top superhydrophilic-superhydrophobic patterned layer. Frosting and defrosting characteristics of functional multi-layers were experimentally investigated. Coating functional multi-layers over aluminum substrates considerably enhanced anti-frosting characteristics. Specifically, the functional multi-layers effectively retarded frost formation on the surfaces, compared to superhydrophilic surfaces, while showing slightly higher frost formation than superhydrophobic surfaces. During defrosting, melting was completed in a fast manner due to the combined effects of the ultrafast temperature increase by the functional multi-layers and the excellent water drainage characteristics by the top superhydrophilic-superhydrophobic patterned layer.
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