This study investigates the effect changing the PH of a copper nanofluid and sodium dodecylbenzenesulfonate (SDBS) surfactant concentration has on the thermal conductivity of the nanofluid. The thermal conductivity was determined through the Hot Disk Transient Plane (TPS) method. As the PH is increased the thermal conductivity also increases because higher PH means more surface charges which increase conductivity. As the SDBS concentration is increased the thermal conductivity slightly increases ...
A series of Al2O3-water nanofluids were synthesized and their thermal conductivities were evaluated under different pH values and concentrations of surfactant (SDBS) using the Thermal Constants Analyzer. All the properties studied were found to have a strong effect on the measured thermal conductivity. By using the procedure listed in the report, the thermal conductivity of Al2O3-water nanofluids can be increased by 10% with the use of only 0.0015 ...
The addition of Cu nanoparticles to water was studied at different pH values and different dispersant concentrations by the measurement of zeta potential and absorbency. Thermal conductivity was measured. It was found that the ideal properties of the nanofluid were obtained at pH 9.5....
Thermal conductivity of heating and cooling fluids with added nanoparticles dubbed 'nanofluids' are used as potential to improve the efficiency of heat transfer fluids using a thermal constants analyser. The Thermal conductivity enhancements of Cu-H2O nanofluids are dependent on the weight fraction of nanoparticles, pH values and sodium dodecylbenzenesulfonate (SDBS) surfactant concentration of nano-suspensions. Combining both the pH and chemical surfactant is recommended to improve the thermal conductivity for ...
