Impact of adding Phase Change Material in the heat sink for cooling Light Emitting Diode

The purpose of this paper is to optimize the volume and the emplacement of PCM in the heat sink for improving the cooling performance of LED with economizing of PCM amount. A numerical model is developed to simulate the PCM melting process with considering natural convection. The Model is then validated with previously published works. It found a good agreement. The incorporation of PCM in the heat sink permit to reduce the junction temperature during melting time and to store an amount of energy which will be evacuated to the ambient accommodation.Different configuration of heat sink with PCM were proposed and their temperature reduced and their energy stored were compared. The importance of the emplacement of PCM with the same volume was investigated. The impact of power input on the PCM efficacy and its use under different heat convection coefficient was studied.