Effect of surface characterization on the application of pool boiling heat transfer augmentation

Abstract

This research article gives an idea about how the pool boiling heat transfer is affected due to the different surface characterization. In the present, study the pool boiling heat transfer coefficient was measured of different working fluid like Isopropyl Alcohol, Acetone and Ethyl Alcohol with three different surface roughness of the copper surface. Three Copper surfaces were taken and these were polished in different emery paper like 800, 1200 and 2000 grade and surface roughness was tested on the surface tester machine and these were kept on the pool-boiling chamber and worked as the boiling surfaces. By changing different working fluid the heat transfer coefficient (HTC) was measured. It is shown that heat transfer is affected due to the change in surface roughness. Surface roughness plays an important role to produce the nucleation cavity on the heating surface as a result of which heat transfer increases in case of the treated surfaces. Heat transfer coefficient is found to be highest on 800 surface roughness and lowest on 2000 surface roughness for all the working fluid. As the density of nucleation site is more on the 800 surface roughness so HTC is more for this surface as compared to other two surfaces.