Experimental Study of Convective Heat Transfer in a Horizontal Tube Using Nanofluids

Anurag Hatwar, V.M.Kriplani

Enhancement, Heat transfer, heat exchanger, nanofluid, thermal conductivity.

Experimental analysis of heat transfer characteristics of Al2O3/water and CuO/water nanofluids flowing inside a horizontal circular tube heated with uniform heat flux is conducted at Reynolds number range of 2800 to 5000. Al2O3 and CuO nanoparticles of 45 nm average size dispersed in distilled water to form stable nanofluids. The volume concentration range of both nanofluids was 0.1% to 0.7%. The result indicates that heat transfer coefficient of both nanofluids increase as compared to base fluid, water. The heat transfer coefficient of CuO/water nanofluid is higher than that of Al2O3 nanofluid for the same concentration and same Reynolds number. In case of CuO/water nanofluid the percentage increase in heat transfer coefficient at Reynolds number 4800 was 40% as compared to water (at 0.1 vol. %) while in case of Al2O3/water nanofluid it was 22.2%. Further, the pressure drop by using nanofluids was not noticeable.

10.22161/ijaers/3.11.7