International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 04 | Apr 2019 www.irjet.net p-ISSN: 2395-0072 © 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 936 Performance Improvement of PCM Assisted Heat Pipe Rajat Bedekar 1 , Pankaj Mhatre 2 , Ashish Ingle 3 , Snehal Gharat 4 , Surekha Khetree 5 1,2,3,4 Students, Department of Mechanical Engineering, Bharati Vidyapeeth College of Engineering, Navi Mumbai, India 5 Guide, Professor, Department of Mechanical Engineering, Bharati Vidyapeeth College of Engineering, Navi Mumbai, India ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - Heat pipe is a heat transfer device that combines the principles of thermal conductivity and phase transition to efficiently manage transfer of heat. Phase Change Material (PCM) storage can contribute 86.7% to the cooling application and 11.7% avoidance of heat dissipation by providing additional heat absorption [1]. PCM are substances can absorb and release heat when material changes from solid to liquid and vice versa. PCM are used in adiabatic section to improve the performance of heat pipe. Phase change material offers greater heat storage per unit volume compared with sensible heat but disadvantage is low charging and discharging rates due to low thermal conductivity. So the rate at which heat is removed from heat pipe to PCM Material is low. So to increase the heat transfer we have introduced metal rings of higher thermal conductivity which increases the surface area in contact with PCM and ultimately heat transfer rate. Results of the experimentation concluded that the performance of the heat pipe is improved by 9.38% due to the introduction of metal rings in PCM compared with without metal ring heat pipe. Key Words: Heat pipe, PCM, Heat exchanger, Heat transfer 1. INTRODUCTION Now a day, we use devices with higher power rating, having higher performance characteristics due to which they got heat up. The heat generated must be removed as due to prolonged use of this device will generate more and more heat which can damage its internal circuits. This problem can be solved by using the heat pipe. Heat pipe is a heat transfer device which transfers heat from hot surface to cold surface at higher rate without use of any external power source. One end of heat pipe is kept near the heat generating source and other end is kept near the heat sink where heat is to be rejected. In 1963, George Grover invented the capillary based heat pipe. He was first to name it as Heat pipe. NASA took this invention of George Grover seriously and developed the Heat pipes which has application and reliability in space flight. In space Heat pipe has their first use in the Satellite. After this NASA tested various heat pipes [7]. 2. PCM Assisted Heat pipe PCM assisted heat pipe is same as that of normal heat pipe but it having some additional portion to increase the rate of heat transfer. By using the PCM in heat pipe performance of heat pipe is improved. 2.1 Construction It consist of three sections condenser, evaporator and adiabatic section. Evaporator section is connected to the heat source and condenser section to heat sink. In adiabatic section PCM material is used. On the outer surface of heat pipe up to certain diameter PCM material is filled in the closed container so that PCM material is in contact with heat pipe [6]. Fig. 2.1 PCM-Assisted Heat Pipe