Optimization of parameters and fabrication of micro channel heat sinks using micro scanning EDM and grey relational analysis

Abstract

Micro-Channel Heat Sinkisan effective and efficient device that can circumvent excess heat from the batteries of an electrical car. Coolants with less resistances are used as carriers of heat from the batteries through the channels. In this research, a novel approach of fabricating micro channels on copper using Micro-Scanning Electrical Discharge Machining (MSEDM) through a multi-functional transistor and capacitance based micromachine is done. The total thickness of the heat sinkis1.2 mm with0.5 mm of channel depth and channel width. A full factorial design of experiments with the input parameters of Voltage(V), Capacitance(pf)and(μs) are considered to get 32 experiments in total. Grey Relational Analysis (GRA) is used to optimize the response parameters MRR, TWR and Channel dilation. The multiple responses are converted into one single Grey Relational Grade and the optimum parameters are selected. Results show that the capacitance is the most influential parameter followed by voltage and then Ton. Also, a parameter combination of Ton = 90 µs, Voltage = 130 V and Capacitance = 100000pf reduces the Channel dilation, MRR andTWR.