• Atif Aziz
• Sujata Pouranik

A nanofluid is the suspension of nanoparticles in a base fluid. Nanofluids are promising fluids for heat transfer enhancement due to their anomalously high thermal conductivity. Experimental studies are discussed in terms of the effects of some parameters such as particle volume fraction, particle size, and temperature on the thermal conductivity of nanofluids. Research about the forced convection of nanofluids is important for the practical application of nanofluids in heat transfer devices. This paper is an experimental study on the forced convective heat transfer and flow characteristics of a nanofluid consisting of water and different volume concentrations of Al2O3 nanofluid (1.6–2.4) % flowing in a horizontal shell and tube heat exchanger counterflow laminar flow conditions. The results show that the convective heat transfer coefficient of nanofluid is slightly higher than that of the base liquid at same mass flow rate and at same inlet temperature. It is found that heat transfer characteristics improves for 1.6% to 2.0% volume fraction and then decreases at 2.4%.

Nanofluid, shell and tube heat exchanger, heat transfer

"Enhancement of Heat Transfer Rate by Nanofluid in a Heat Exchanger", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 12, page no.431-436, December-2018, Available :http://www.jetir.org/papers/JETIR1812260.pdf

"Enhancement of Heat Transfer Rate by Nanofluid in a Heat Exchanger", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 12, page no. pp431-436, December-2018, Available at : http://www.jetir.org/papers/JETIR1812260.pdf