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In this paper, the heat transfer coefficient and the heat transfer rate of a heat exchanger is evaluated by using nanofluids. The silicon carbide nanoparticles, milled and sonificated as nanofluids with volume fractions of 0.01499(%) and 0.01399(%) are used. The heat transfer characteristics of SiC(P)/water, SiC(M)/water, SiC(P)/EG, and SiC(M)/EG are measured in a concentric tube heat exchanger under laminar flow condition. The consequence of nanoparticle physiognomies and Reynolds number, on the heat transfer characteristics are evaluated. It has been found that the addition of milled nanoparticle in the base fluids enhances the heat transfer characteristics rather than the normal nanoparticle. The experimental results shows that the heat transfer coefficient rate of SiC(M) is higher than that of SiC(P) in both the case of water and EG. Further the Reynolds number and Nusselt number for SiC (M) was found higher than SiC (P), which is essential for heat transfer flow.

Consequence of nanoparticle physiognomies on heat transfer characteristics of heat exchanger