The usefulness of a material in thermoelectric systems is determined by the two factors device efficiency and power factor. Andere suchten auch nach Relationship between thermoelectric figure of merit and energy. While the thermoelectric materials figure of merit is a well defined metric to evaluate thermoelectric materials, it can be a poor metric for maximum thermoelectric device efficiency because of the temperature dependence of the Seebeck coefficient S, the electrical resistivity ρ, and the thermal conductivity κ where T. Ioffe introduced the figure. The formula for maximum efficiency (ηmax) of heat conversion into electricity by a thermoelectric device in terms of the dimensionless figure of merit (ZT) has been widely used to assess the desirability of thermoelectric materials for devices.
Z as a byproduct of the derivation of. However, the efficiency of thermoelectric devices is not high enough to rival the Carnot efficiency ,. A dimensionless figure of merit (ZT) is defined as a . TEMPERATURE DEPENDENCE OP THERMOELECTRIC FIGURE OF MERIT. AND MAXIMUM THERMAL EFFICIENCY OF A THERMOELECTRIC. For these approximations, the device figure of merit for cooling, ZT is analogous to the material figure of merit zT.
In a thermoelectric generator, the efficiency is . Key words: thermoelectric efficiency , thermoelectric parameters, extremum,.