Effect of Inclination Angle in Heat Pipe Performance Using Copper Nanofluid

An experiment was carried out to study the thermal efficiency enhancement of the heat pipe using copper nanofluid as the working fluid. The copper nanoparticles are uniformly suspended with the de-ionized water using ultrasonic homogenizer to prepare the copper nanofluid. The average particle size of the copper is 40 nm and the concentration of copper nanoparticle in the nanofluid is 100 mg/lit. The study discusses about the effect of heat pipe inclination, type of working fluid and heat input on the thermal efficiency and thermal resistance. The experimental results are evaluated in terms of its performance metrics and are compared with that of DI water.