Effects of temperature and volume concentration on thermal conductivity of TiO2-MWCNTs (70-30)/EG-water hybrid nano-fluid

In current investigation, an empirical study on the effects of temperature and volume concentration of nanopartides on the thermal conductivity of TiO2-MWCNTs/EG-water hybrid nano-fluid is examined. Thermal conductivity measurement were carried out in various temperatures range between 20 to 60 degrees C and volume concentrations of 0.0625, 0.125, 0.25, 0.5, 0.75 and 1%. Experimental findings indicated that the thermal conductivity increased with enhancing in the volume concentration and temperature. Furthermore, present results indicate that the maximum increment of thermal conductivity was 34.31%. This took place at the temperature of 60 degrees C and volume concentration of 1%. Also results displayed that, the nano-fluid thermal conductivity at high temperature is more sensitive to the changes rather than at low temperatures. A new experimental correlation is also suggested with the maximum deviation of 2.72%. R-squared of the proposed model is 0.9932 which indicates an excellent agreement of the present correlation and empirical results. (C) 2019 Elsevier B.V. All rights reserved.