Performance evaluation of the cylindrical shaped heat pipe utilizing water-based CuO and ZnO hybrid nanofluids

The influence of the heat pipe orientation and the working fluid type of the screen mesh wick heat pipe was investigated experimentally. A hybrid nanofluid using three proposals for composite nanoparticles scattered in DI Water was used as the working fluid. In each case, seven directions (0 degrees-90 degrees, deviation 15 degrees) were investigated. Thermal properties were evaluated by the average temperature gap between the evaporator and condenser surfaces, thermal resistance, thermal conductivity (effective), and overall HTC. Experimental results imply that the tilt angle and the hybrid nanofluid used have a significant impact on heat transfer of heat pipe. By the time the tested heat pipes come into contact with 75% CuO-25% ZnO/DI water at an angle of 60 degrees, they have the best heat transfer properties of any other type of fluid. Furthermore, it was found that the thermal characteristic of the heat pipes tested were hampered by the expansion of heat loads in the range 60-160 W.