Optimal design of a multi-couple thermoelectric generator

The performance of a multi-couple thermoelectric device as a generator is i nvestigated. The general expressions of two important performance parameter s, the efficiency and power output, are given. The eta-K characteristic cur ves of a thermoelectric generator are presented for some differently constr ained conditions, where eta is the efficiency of the thermoelectric system and K is the total thermal conductance of the multi-couple thermoelectric d evice. The maximum efficiency of the system is calculated. The structure pa rameters of the device are optimized. The effect of the thermal conductance s between the thermoelectric device and the external heat reservoirs on the performance of the system is expounded by using some representative numeri cal examples. The results obtained here will be useful for a more detailed investigation and for the optimal design of real thermoelectric generators.