EXPRIMENTAL INVESTIGATION OF POOL BOILING & OPTIMIZATION OF CRITICAL HEAT FLUX BY USING Al2O3 NANOFLUID

This work performed the experimentation to study the pool boiling and optimization analysis of critical heat flux using nanofluid. Phenomenon of boiling heat transfer plays a crucial role in the design of high heat flux system like boilers, heat exchanger, microscopic heat transfer devices. This works uses the Al2O3 nanoparticles for experimentation. The experiments covered the following range: Nanofluid concentration (NFC) 6 gm/lit, 9 gm/lit and 12 gm/lit, surface area of heater (AS) 94.79 mm2 , 129.90 mm2 and 193.17 mm2 and mass flow rate of condenser water (Mf) 6 kg/min, 12 kg/min and 18 kg/min. Critical heat flux (CHF) and surface roughness (Ra) considered as performance parameters. The factorial method of design of experiment (DOE) with 3 factors and 2 levels is used for the sequence of experimental trails. The correlations are used for determining theoretical critical heat flux for distilled water. The experimental results for distilled water are compared with theoretical results obtained from correlation equations. There is a good agreement between theoretical and experimental results which gives validation of experimental test rig. The analysis is done with regression method and D'optimal method is used for response optimization