Optimization of heat sink configuration for thermoelectric cooling system based on entropy generation analysis

This paper develops a generalized theoretical model for studying the optimum configuration of a thermoelectric cooling (TEC) system by applying entropy generation analysis method. A dimensionless entropy generation number based on thermal conductance is also proposed to evaluate the external irreversibilities in the TEC system. Based on the model, the optimum configuration analyses of a TEC system are performed. Obtained analysis results indicate that the minimum entropy generation and the maximum coefficient of performance (COP) can be obtained by properly dividing the finite total thermal conductance into the hot side and the cold side heat exchanger. Furthermore, the effects of the total thermal conductance and the heat capacity rate of the cooling fluid on the irreversibilities under the conditions of the maximum COP and cooling capacity are also investigated in detail. The present study aims to provide a further insight of the TEC system optimization.