Method of reliability control of thermoelectric systems to ensure thermal regimes

Abstract

The paper presents the results of research of controllability of the thermoelectric system for ensuring thermal modes of
electronic equipment, including a regulator, a cooler, and a component of excess heat removal to the environment. It is shown that for
the use of methods of optimization of automatic control systems it is necessary to study the transfer and dynamic characteristics of
the object - thermoelectric cooling device with one input and one output. The mathematical model of the thermoelectric cooler of the
system of providing thermal modes of a given design is presented, which takes into account the influence of the conditions of
interaction of the heat sink with the medium on the main significant parameters, reliability indicators, dynamic and energy
characteristics of the single stage cooler. The model is created for the operating range of cooling, level of thermal load, geometry of
thermocouple branches, different temperature of the medium, for the characteristic thermal regime of maximum cooling capacity.
The results of calculations of the main significant parameters, reliability indicators, dynamic and energy characteristics of the cooler
for different medium temperature in the operating temperature range and variation of conditions of heat exchange of the heat sink
with the medium are given. It is shown that as the intensity of heat exchange of the heat sink with the medium increases, the
temperature difference between the heat sink and the medium decreases. This makes it possible to significantly reduce the relative
failure rate, increase the probability of failure-free operation of the thermoelectric cooler and control the reliability indicators of the
device of a given design during operation.