Critical heat flux enhancement in pool-boiling heat transfer using oxidized multi-wall carbon nanotubes

Abstract

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.

Heat transfer enhancement in pool boiling and condensation using h-BN/DCM and SiO2/DCM nanofluids: experimental and numerical comparison

“…They reported that so long as nanoparticle concentration increases, the boiling heat transfer coefficient increases. As a consequence of their experimental study, Park and Kim (2015) obtained a 21.04% increment in the boiling heat transfer coefficient when they used CM-100 nanoparticles-containing nanofluid. For after-saturation pool boiling conditions, nanofluid usage slightly improved the heat transfer coefficients compared to results attained under saturation conditions.…”

“…Accordingly, nanofluids have been successfully used for improving the thermal performance of boiling–condensation processes. Park and Kim (2015) conducted an experimental study for specifying the critical heat flux (CHF) and heat transfer coefficient for multi-wall carbon nanotubes (CM-95 and CM-100) and oxidized-type multi-wall carbon nanotube under pool boiling conditions. They attained the highest CHF increment in their test performed by using the nanofluid that has 0.001% nanoparticle concentration.…”

Comparison between Nucleate Pool Boiling Heat Transfer of Graphene Nanoplatelet- and Carbon Nanotube- Based Aqueous Nanofluids

“…For comparison, Liu et al also studied boiling with pure water on a CNTs-coated surface and observed that the CNTs nanofluids provided better increase for both CHF and nucleate BHTCs. Park and Kim 23 stated that at a concentration of 0.001 vol % multi-walled CNTs the nanofluids optimally increased the CHF and HTC of nucleate boiling. Park and Jung 24 concluded up to 30% rise in HTC of the nucleate boiling using hydrochlorofluorocarbon better known as R22-and water-based 1.0 vol % CNT nanofluids.…”

Synergistic effect of mixed wettability of micro-nano porous surface on boiling heat transfer enhancement

“…nanowires [18][19][20], nanotubes [21][22][23] and nanopores [24,25] have been widely used to strengthen the pool boiling heat transfer. Copper foam as a promising porous media has been employed extensively in heat dissipation due to its high porosity and high specific surface area.…”