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Effect of surface wettability on boiling and evaporation

Author

Listed:
  • Takata, Y.
  • Hidaka, S.
  • Cao, J.M.
  • Nakamura, T.
  • Yamamoto, H.
  • Masuda, M.
  • Ito, T.

Abstract

Titanium dioxide, TiO2, is one of the photocatalysts that has a very unique characteristic. The surface coated with TiO2 exhibits extremely high affinity for water by exposing the surface to UV light and the contact angle decreases nearly to zero. On the contrary, the contact angle increases when the surface is shielded from UV light. We applied this superhydrophilic nature to enhancement of boiling and evaporation heat transfer. Experiments of pool boiling and evaporation of single water droplet have been performed to manifest the effect of high wettability on heat transfer characteristics. Both of TiO2-coated and non-coated surfaces were used for comparison in each experiment. It is found that (1) the critical heat flux (CHF) of TiO2-coated surface is about two times larger than that of non-coated one, and (2) Leidenfrost temperature increases as the contact angle decreases. The superhydrophilic surface can be an ideal heat transfer surface.

Suggested Citation

  • Takata, Y. & Hidaka, S. & Cao, J.M. & Nakamura, T. & Yamamoto, H. & Masuda, M. & Ito, T., 2005. "Effect of surface wettability on boiling and evaporation," Energy, Elsevier, vol. 30(2), pages 209-220.
    • Handle: RePEc:eee:energy:v:30:y:2005:i:2:p:209-220
    DOI: 10.1016/j.energy.2004.05.004
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    References listed on IDEAS

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    1. Rong Wang & Kazuhito Hashimoto & Akira Fujishima & Makota Chikuni & Eiichi Kojima & Atsushi Kitamura & Mitsuhide Shimohigoshi & Toshiya Watanabe, 1997. "Light-induced amphiphilic surfaces," Nature, Nature, vol. 388(6641), pages 431-432, July.
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    Cited by:

    1. Shoukat A. Khan & Muataz A. Atieh & Muammer Koç, 2018. "Micro-Nano Scale Surface Coating for Nucleate Boiling Heat Transfer: A Critical Review," Energies, MDPI, vol. 11(11), pages 1-30, November.
    2. Hesam Moghadasi & Navid Malekian & Hamid Saffari & Amir Mirza Gheitaghy & Guo Qi Zhang, 2020. "Recent Advances in the Critical Heat Flux Amelioration of Pool Boiling Surfaces Using Metal Oxide Nanoparticle Deposition," Energies, MDPI, vol. 13(15), pages 1-49, August.
    3. Yuan, Xiao & Du, Yanping & Su, Jing, 2022. "Approaches and potentials for pool boiling enhancement with superhigh heat flux on responsive smart surfaces: A critical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 156(C).
    4. Li, Wei & Dai, Renkun & Zeng, Min & Wang, Qiuwang, 2020. "Review of two types of surface modification on pool boiling enhancement: Passive and active," Renewable and Sustainable Energy Reviews, Elsevier, vol. 130(C).

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