Abstract
This paper reports a comparative analysis of the thermal regime control means while minimizing a set of basic parameters in various combinations with the indicators of reliability and dynamics of the functioning of a single-stage thermoelectric cooler. The connection has been established between the optimal relative operating current corresponding to the minimum of the set on the relative temperature difference and heat sink capacity of the radiator. The results of calculating the main parameters, reliability indicators, time of entering the stationary mode of operation for various current modes of operation at a fixed temperature difference, thermal load at different geometry of the branches of thermoelements are given. A comparative analysis of the main parameters, indicators of the reliability and operational dynamics of a single-stage cooler under various characteristic current modes of operation has been carried out. Minimizing the set of basic parameters in conjunction with the reliability indicators and operational dynamics of the cooling thermoelement provides a decrease in the refrigeration coefficient up to 40 % compared to the maximum cooling capacity mode, as well as the optimal heat sink capacity of the radiator, the amount of energy expended, the time of entering the stationary mode, the relative intensity of failures. The analysis of the influence of the temperature difference at a predefined thermal load on the relative operating current, the time it takes for the cooler to enter the stationary thermal regime, the heat sink capacity of the radiator, the relative intensity of failures has been performed. The devised method of optimal control over the thermal regime of a single-stage thermoelectric cooler based on minimizing the set of basic parameters makes it possible to search for and select compromise solutions, taking into consideration the weight of each of the limiting factors
Highlights
Strict requirements for the weight and size characte ristics and failure rates of heat-loaded onboard equipment for ensuring the thermal regimes of heat-loaded electronic equipment make the use of thermoelectric coolers alternative-free
The relevance of scientific problems is due to the need to find such a current mode of the thermoelectric cooler, which contributes to finding a compromise between interrelated dynamic characteristics and reliability indicators
Active systems for ensuring thermal regimes involve the inclusion of a thermoelectric cooler in the feedback circuit, which significantly increa ses the importance of the dynamic characteristics of the cooler [8]
Summary
Strict requirements for the weight and size characte ristics and failure rates of heat-loaded onboard equipment for ensuring the thermal regimes of heat-loaded electronic equipment make the use of thermoelectric coolers alternative-free. The issues of improving the reliability of thermoelectric systems for ensuring thermal regimes have not been highlighted, this parameter is decisive under the pulse-periodic mode for heat-loaded elements [2]. Active systems for ensuring thermal regimes involve the inclusion of a thermoelectric cooler in the feedback circuit, which significantly increa ses the importance of the dynamic characteristics of the cooler [8]. Control issues related to the complex influence of the current modes of operation of the thermoelectric cooler, structural parameters in the operating temperature range remained unsolved. The choice of a set of interrelated parameters for controlling the thermo electric cooler is an important task, resolving which could solve the problem of controlling the thermoelectric system for ensuring the thermal regimes of heat-loaded elements. The set of parameters should provide a compromise between the required dynamic characteristics, permissible reliability indicators of the thermoelectric cooler
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