화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.24, 276-283, April, 2015
DOI10.1016/j.jiec.2014.09.041  Export Citation
Effects of spray-deposited oxidized multi-wall carbon nanotubes and graphene on pool-boiling critical heat flux enhancement
Sung-Seek Park, Yong Hwan Kim1, Yong Han Jeon2, Myung Taek Hyun1, and Nam-Jin Kim†
  • Department of Nuclear & Energy Engineering, Jeju National University, Jeju 690-756, Republic of Korea
  • 1Department of Mechanical Engineering, Jeju National University, Jeju 690-756, Republic of Korea
  • 2Department of Protection and Safety, Sang Ji Young seo College, Wonju, 220-713, Republic of Korea
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This paper examines the differences in critical heat flux (CHF) based on multi-wall carbon nanotubes and graphene have been found as new heat-transfer materials which are carbon allotropes with different shapes. The analysis of experimental data and results of calculations in pool-boiling critical heat flux experiments by spray-depositing oxidized multi-wall carbon nanotubes and graphene onto heat-transfer samples have been done to improve the economic efficiency and safety of the heat-transfer apparatus. The results show that the contact angle of the heat-transfer surface linearly decreased with spray deposition time, which resulted in an increased critical heat flux. The oxidized multi-wall carbon nanotubes and graphene showed maximum pool-boiling heat-transfer coefficients at 19.8° and 21.7°, respectively, while the pool-boiling heat-transfer coefficients decreased at angles of 9.9° or less and 12.5° or less, respectively. Also, the following new correction formula has been derived and compared with a current model by introducing a correction factor to Kandlikar's prediction model.
Keywords:Multi-wall carbon nanotubes;Graphene;CHF;Heat flux;Spray deposition
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