UNSTEADY OPERATINGMODE OF THERMOPILES

摘要

Methods of mathematical simulation for unsteady operating modes of stage thermopiles areproposed. Thermopile model is presented as a system of solids with lumped parameters (solidshaving heat capacity, wherein thermoelectric processes of thermal absorption or heat release takeplace), communicating with each other and the environment through thermal conductivities. Suchmodel of stage thermopile is described by the system of ordinary inhomogeneous nonlineardifferential equations, which allowed using for its analysis an effective method of finite elements,well elaborated in computational physics and adapted by the authors for mathematical simulationof unsteady modes of thermopiles. Owing to the fact that calculation of thermal conductivities isperformed with regard to real geometry and thermophysical properties of thermopile parts (sides)and nonlinear dependences of these conductivities on temperature, the accuracy of calculation isachieved that enables to apply proposed methods in all stages of thermoelectric devicedevelopment. In the initial stages the methods are used for design statement formatting, in thesubsequent stages - for confirmatory calculation.