Scalable Graphene Coatings for Enhanced Condensation Heat Transfer
Name
PDF Scalable Graphene Coatings for Enhanced Condensation Heat Transfer.pdf
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Format
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Checksum (MD5)
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Author(s)
Preston, Daniel John
Mafra, Daniela Lopes
Miljkovic, Nenad
Wang, Evelyn
Kong, Jing
Date Issued
March 2015
Journal
Nano Letters
Publisher
American Chemical Society (ACS)
Citation
Preston, Daniel J. et al. “Scalable Graphene Coatings for Enhanced Condensation Heat Transfer.” Nano Letters 15.5 (2015): 2902–2909.
Version
Author's final manuscript
Abstract
Water vapor condensation is commonly observed in nature and routinely used as an effective means of transferring heat with dropwise condensation on nonwetting surfaces exhibiting heat transfer improvement compared to filmwise condensation on wetting surfaces. However, state-of-the-art techniques to promote dropwise condensation rely on functional hydrophobic coatings that either have challenges with chemical stability or are so thick that any potential heat transfer improvement is negated due to the added thermal resistance of the coating. In this work, we show the effectiveness of ultrathin scalable chemical vapor deposited (CVD) graphene coatings to promote dropwise condensation while offering robust chemical stability and maintaining low thermal resistance. Heat transfer enhancements of 4× were demonstrated compared to filmwise condensation, and the robustness of these CVD coatings was superior to typical hydrophobic monolayer coatings. Our results indicate that graphene is a promising surface coating to promote dropwise condensation of water in industrial conditions with the potential for scalable application via CVD.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1021/nl504628s
