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B7: Device and system performance

Characterization of a Mg2SiSn/Zn4Sb3 thermoelectric module using an improved thermoelectric module test device

Kaspar K. Nielsen1, Dennis Christensen1, Nini Pryds1, Hao Yin2, Peter Riis2, Paul N. Egginton2, Rasmus Bjørk1
1DTU Energy Conversion, Technical University of Denmark2TEGnology ApS, Vejle, Denmark

The performance of an optimized thermoelectric module with legs consisting of n-type Mg2SiSn and p-type Zn4Sb3 are evaluated in an improved thermoelectric module test device.

Firstly, we describe the improved module test device with particular emphasis on determining the heat flux through the thermoelectric module. The thermoelectric module is evaluated at a range of hot side temperatures in terms of I-V curves and the measured heat flux through the device.

Secondly, we discuss the optimization of the module using a three dimensional numerical model, which simulates a thermoelectric module including all thermoelectric effects, heat losses and temperature dependent thermoelectric material properties.

Thirdly, we compare the measured power output and efficiency of the module with the performance predicted by the model.