Session: Research Posters

Paper Number: 119021

119021 - Convective Heat Transfer Enhancement of Tio2/water Nanofluid in Internal Tube Flows 

Convection heat transfer plays an important role in various heat exchangers used in process and other industries. One of the main objectives for such heat exchangers is to maximize heat transfer with minimum occupied space and capital cost. Therefore, this subject is important and under research investigation. One of the possible way to increase rate of heat transfer is to modify the heat transfer properties of cooling fluids inside the tubes. Measurements are performed for the internal convective heat transfer of TiO₂ based water nanofluid in fully developed turbulent flow regime under uniform heat flux condition in horizontal copper tube with 16.5 mm internal diameter. Spherical shaped TiO₂ nanoparticles with 15nm diameter, functionalized by chemical treatment are dispersed into deionized water. Very low concentrations of TiO₂ nanoparticles such as 0.01vol.% is used to prepare suspension. Results indicate that heat transfer rate increased as volume fraction of nanoparticles increased. Enhancement of 3.5% is observed for 0.01vol.%. Decrease in Local heat transfer coefficient and local Nusselt number is observed by changing axial distance from start of test section to the end. This work shows the potential of nanofluids heat transfer in tube flows and convection heat transfer enhancement. Therefore, more focus needs to be given in future investigations to understand the fundamnetals of nanofluids. 

Convection heat transfer plays an important role in various heat exchangers used in process and other industries. One of the main objectives for such heat exchangers is to maximize heat transfer with minimum occupied space and capital cost. Therefore, this subject is important and under research investigation. One of the possible way to increase rate of heat transfer is to modify the heat transfer properties of cooling fluids inside the tubes. Measurements are performed for the internal convective heat transfer of TiO₂ based water nanofluid in fully developed turbulent flow regime under uniform heat flux condition in horizontal copper tube with 16.5 mm internal diameter. Spherical shaped TiO₂ nanoparticles with 15nm diameter, functionalized by chemical treatment are dispersed into deionized water. Very low concentrations of TiO₂ nanoparticles such as 0.01vol.% is used to prepare suspension. Results indicate that heat transfer rate increased as volume fraction of nanoparticles increased. Enhancement of 3.5% is observed for 0.01vol.%. Decrease in Local heat transfer coefficient and local Nusselt number is observed by changing axial distance from start of test section to the end. This work shows the potential of nanofluids heat transfer in tube flows and convection heat transfer enhancement. Therefore, more focus needs to be given in future investigations to understand the fundamnetals of nanofluids. 

Convection heat transfer plays an important role in various heat exchangers used in process and other industries. One of the main objectives for such heat exchangers is to maximize heat transfer with minimum occupied space and capital cost. Therefore, this subject is important and under research investigation. One of the possible way to increase rate of heat transfer is to modify the heat transfer properties of cooling fluids inside the tubes. 

Presenting Author: Hafiz Muhammad Ali KFUPM

Presenting Author Biography: Dr. Hafiz Ali is a professor of Mechanical Engineering at King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.

Authors:

Hafiz Muhammad Ali KFUPM
Muhammad Asif KFUPM