Enhancement of Thermal Performance of Nanofluids in Heat Pipe

The using of nanofluid as a perfect choice to replace convectional fluids is the most promising technique that used for enhancement thermal performance for heat transfer process. The effect of nanofluids Alumina- deionized water (DI) (Al2O3-H2O) with wick in the heat pipe for enhancement the heat pipe thermal performance has been investigated experimentally in this work. The heat pipe contain two phases vapor phase in lower part from the heat pipe and liquid phase in upper part from the heat pipe, using three concentration of nanofluid ( =0%,0.05%,0.1% ) ,three value of heat flux (7.4W,11W,16.8W) and two value of angle of heat pipe (90ᵒ,45ᵒ). Result showed decrease the time to reach the steady state when increases the concentration of nanofluid ,heat flux and incline the heat pipe from 90ᵒ angle to 45ᵒ angle . The properties such as viscosity, density and thermal conductivity for nanofluid increase when the concentration of nanofluid increase, the heat pipe thermal performance is enhancement by increasing of nanofluid concentration, heat flux and incline the heat pipe from 90ᵒ angle to 45ᵒ angle.