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Effect of polymer coating on vapor condensation heat transfer

Access

info:eu-repo/semantics/closedAccess

Date

2020

Author

Budaklı, Mete
Salem, Thamer Khalif
Arık, Mehmet
Dönmez, Barca
Menceloğlu, Yusuf

Metadata

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Abstract

Condensation heat transfer coefficients (HTCs) are rather low compared to thin film evaporation. Therefore, it can be a limiting factor for designing heat transfer equipment. In this work, heat transfer characteristics of water vapor condensation phenomena were experimentally studied on a vertically aligned smooth copper substrate for a range of pressures and temperatures for two different liquid wettability conditions. The heat transfer performance is dominated by the phase change process at the solid-vapor interface along with the liquid formation mechanism. Compared to heat transfer results measured at an untreated copper surface, heat transport is augmented with a thin layer of perfluoro-silane coating over the same substrate. In this work, the effect of saturation pressure on the condensation process at both surfaces has been investigated by analyzing heat transfer coefficients. The results obtained experimentally show an increase in contact angle (CA) with the surface coating. A heat transfer augmentation of about 26% over uncoated surfaces was obtained and surfaces did not show any degradation after 40h of operation. Finally, current results are compared with heat transfer values reported in open literature.

Source

Journal Of Heat Transfer-Transactions Of The Asme

Volume

142

Issue

4

URI

http://doi.org/10.1115/1.4046300
https://hdl.handle.net/20.500.12846/152

Collections

  • Makine Mühendisliği Bölümü Koleksiyonu [32]
  • Scopus İndeksli Yayınlar Koleksiyonu [278]
  • WoS İndeksli Yayınlar Koleksiyonu [315]



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