Heat pipe is an effective heat transfer device which transports huge amount of heat between the two temperature limits with minimum temperature gradient. The main problem with heat pipe working fluids is poor heat transfer characteristics of working fluids. This paper presents study of thermal properties (thermal efficiency η, thermal resistance R) of the wicked heat pipe with wings when changing inclination angle and heat supplied at evaporator region. The experiments are conducted for various heat inputs 100W, 150W, 200W, 250W, and 300W; various inclination angles 00 , 150 , 300 , 450 , 600 , 750 , and 900 .

Keywords: Heat pipe, thermal efficiency, thermal resistance, inclination angle, heat supplied.