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Critical heat flux enhancement in pool‐boiling heat transfer using oxidized multi‐wall carbon nanotubes
Author(s) -
Park SungSeek,
Kim NamJin
Publication year - 2015
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.3341
Subject(s) - nanofluid , materials science , volume fraction , carbon nanotube , critical heat flux , heat transfer coefficient , boiling , heat flux , heat transfer , heat transfer enhancement , volume (thermodynamics) , chemical engineering , composite material , thermodynamics , nanoparticle , nanotechnology , physics , engineering
Summary In this study, the critical heat flux (CHF) and heat‐transfer coefficient under the pool‐boiling state were tested using multi‐wall carbon nanotubes (MWCNT) CM‐95, CM‐100, and oxidized MWCNT CM‐100. The results showed that the highest CHF increase for both MWCNT CM‐95 and CM‐100 was at the volume fraction of 0.001%, and that the CHF increase ratio for MWCNT CM‐100 nanofluid with long particles was higher than that for MWCNT CM‐95 nanofluid with short particles. In addition, at the volume fraction of 0.001%, the oxidized MWCNT CM‐100 nanofluid indicated a 47.27% higher CHF‐increase ratio as well as an approximately 21.04% higher heat‐transfer coefficient increase ratio compared with the MWCNT CM‐100 nanofluid without oxidation treatment. Copyright © 2015 John Wiley & Sons, Ltd.