Thermal control of a complex of thermoelectric cooling devices

Abstract

The paper presents the results of research into the possibility of controlling a complex of thermoelectric cooling devices with parallel electrical connection in a non-uniform temperature field. Such formulation of the problem of creating systems for ensuring thermal conditions of radio-electronic equipment is relevant for on-board information systems, which are subject to stringent requirements for reliability and mass-size characteristics. Research are carried out for the most used temperature range from 295K to 250K in the range of power dissipation from 0.5 W to 15 W for different values of supply voltage. The model of the executive body of the system of thermal modes provision based on the complex of thermoelectric coolers with parallel electrical connection is developed. The model takes into account different dissipation power, non-uniform temperature field, different supply voltages and geometry of thermoelectric cell branches. The comparative analysis of basic parameters, reliability indices and dynamic functioning of the complex of thermoelectric coolers for different supply voltages, different temperature levels of cooling with the corresponding thermal load is carried out. The possibility of selecting the optimal supply voltage taking into account the limitations on the operating current, mass, energy, dynamic and reliability characteristics of the thermoelectric cooler complex is shown. The analysis of the research results has shown the possibility of choosing the nominal of supply voltages taking into account the limitations on mass-size, energy, dynamic and reliability characteristics for different geometry of thermoelements branches.