Enhancement of pool boiling performance using SWCNT based nanofluids: A sustainable method for the wastewater heat recovery

Abstract

Heat extraction from the wastewater is important and challenging task in the industry. Performance of the heat extraction decreases mainly due to the boiling crisis. Researchers are using nanofluids as a better alternative for the conventional base fluids. Nanofluids exhibit the better performance due to higher thermo-physical properties. Thus, in this study, we used single walled carbon nanotubes (SWCNT) for the boiling operation. in the experimentations, we used two types of the heater surfaces, first is bare heater surface and other is the SWCNT deposited heater surface. Then we compared the performance of the both heater surfaces.

The critical heat flux value observed in the case of nanoparticle deposited surface is 2.14 MW/m² and the bare heater is 2.26 MW/m². Because the nanoparticle deposited surface promotes the smaller size of the bubbles at a rapid rate. Due to the increased surface roughness. The heat transfer coefficient is also a 5 % more in the nanoparticle deposited surfaces than the bare heater surface.