Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Dropwise condensation induced on chromium ion implanted aluminum surface

  • Kim, Kiwook (School of Mechanical Engineering, Pusan National University) ;
  • Lee, Youngjin (School of Mechanical Engineering, Pusan National University) ;
  • Jeong, Ji Hwan (School of Mechanical Engineering, Pusan National University)
  • Received : 2018.01.27
  • Accepted : 2018.09.26
  • Published : 2019.02.25
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Abstract

Aluminum substrates are irradiated with chromium ions and the steam condensation heat transfer performance on these surfaces is examined. Filmwise condensation is induced on the surface of aluminum specimens irradiated with chromium ion dose of less than $10^{16}ions/cm^2$ while dropwise condensation occurs on the specimens irradiated with chromium ion dose of $5{\times}10^{16}ions/cm^2$ in the range of ion energy from 70 to 100 keV. The heat transfer coefficient of the surfaces on which dropwise condensation occurs appeared to be approximately twice as much as the prediction by Nusselt's film theory. In a durability test, dropwise condensation lasts over six months and the heat transfer coefficient is also maintained.

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References

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