Saeid Majdnia - Master's student in Mechanical Engineering, Islamic Azad University, Bushehr Branch, Iran
Mehdi Nakisa - Assistant Professor of Mechanical Engineering, Islamic Azad University, Bushehr Branch, Iran

In this research, a numerical study of the effect of the use of water-aluminum oxide nanofluid on the heat transfer rate and pressure drop of the shell and tube heat exchanger has been done. For this purpose, computational fluid dynamics method and AnsysFluent commercial software have been used. The effect of Reynolds number and the volume fraction of nanoparticles in the base fluid on the increase in heat transfer, increase in pressure drop and the efficiency of the heat exchanger have been studied. The results show that the addition of nanofluid to the base fluid can significantly improve the heat transfer rate and heat exchanger efficiency. Also, the results show that as the Reynolds number increases and the flow becomes more turbulent, the amount of heat transfer also increases. The results show that if the goal is to use a flow with a Reynolds number of ۶۰۰۰, the use of nanofluid with a volume fraction of ۱% and ۲% is more optimal. For flow with Reynolds number of ۷۵۰۰, the use of nanofluid with a volume fraction of ۳% is optimal. There is no justification for using nano fluid with a volume fraction of ۴%. The results show that the best calculated efficiency factor is equal to ۱.۸۹, which is obtained for a Reynolds number of ۷۵۰۰ and a volume fraction of ۳%. The lowest PEC coefficients are generally related to pure water fluid.

nano fluid, heat transfer, shell and tube heat exchanger, aluminum oxide nanoparticle