The heat pipe is a thermal device which affords efficient transport of thermal energy by using an intermediate heat transfer fluid. Heat pipes consist of a sealed container with a small amount of a working fluid. The heat is transferred as latent heat energy by evaporating the working fluid in the evaporator zone and condensing the vapour in a cooling zone, the circulation is completed by the return flow of the condensate to the evaporator zone through the wrapped screen capillary structure which lines the inner wall of the container. By suitable design, heat pipes are being constructed to serve diverse functions such as precise temperature control, one-way transmission of heat (thermal diode) and heat flux amplification and diminution.

The heat pipes are more advantageous in heat recovery systems, solar energy , Electronics cooling, Ocean thermal energy conversion, air craft cooling, Geothermal conversion and light water nuclear reactors. The common sections of the vapour space are circular, rectangular and annular and are chosen based on the application of heat pipe.

In this paper, the heat pipe working parameters are analyzed using Taguchi methodology. The Taguchi method is used to formulate the experimental work, analyze the effect of working parameters of the heat pipe and predict the optimal parameter of heat pipe such as heat input, inclination angle and flow rate. It is found that these

Parameters have a significant influence on heat pipe performance. The analysis of the Taguchi method reveals that, all the parameters mentioned above have equal contributions in the performance of heat pipe efficiency, thermal resistance and overall heat transfer coefficient. Experimental results are provided to validate the suitability of the proposed approach.