Investigations on the pool boiling heat transfer and critical heat flux of ZnO-ethylene glycol nanofluids
作者： Madhusree Kole , T.K. Dey
DOI: 10.1016/J.APPLTHERMALENG.2011.10.066
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摘要: Abstract Surfactant free and fairly stable ZnO-ethylene glycol (EG) nanofluids are prepared using prolonged sonication (>60 h). Extended period of results in superior fragmentation dispersion ZnO nanoparticles, as is evident from the DLS data. Thermal conductivity nanofluid displays a maximum enhancement 40% for 3.75% volume fractions loading EG at 30 °C. The nucleate pool boiling heat transfer characteristics ZnO-EG with various nanoparticles measured atmospheric pressure employing cylindrical polished copper heater surface. coefficient enhances concentration attains 22% compared to that base fluid fraction 1.6%. However, further decreases coefficient. Critical flux measurements performed thin Constantan wire. CHF value appreciably increases increasing ∼117% containing 2.6% ZnO.
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