In situ generated hydrophobic micro ripples via π-π stacked pop-up reduced graphene oxide nanoflakes for extended critical heat flux and thermal conductivities.

ABSTRACT: We report the synthesis of thermally heated pop-up reduced graphene oxide (Pop-rGO) and its nanofluid (Pop-rGO-Nf) in DI water for extended critical heat flux (CHF) in a nucleate pool boiling experiment. When Pop-rGO-Nf is boiled over a nichrome (NiCr) wire heater the CHF values were increased up to 132%, 156%, and 175% with increasing concentrations of 0.0005 vol%, 0.001 vol%, and 0.005 vol% at heat fluxes of q'' = 264 333 kW m^-2, 339 202 kW m^-2, and 327 895 kW m^-2, respectively, because of the higher surface area of 430 m² g^-1. We also found a decrease in the CHF value from 0.05 vol% (175%) to 0.01 vol% (153%) for Pop-rGO-Nf due to the nanofluid concentration reaching the saturation point. After nucleate pool boiling, the deve

SUBMITTER: Cheedarala RK 

PROVIDER: S-EPMC9072717 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature