Designing a singlecascade thermoelectric cooler with the predefined time to enter a stationary mode of operation
DOI:
https://doi.org/10.15587/1729-4061.2019.184400Keywords:
thermoelectric cooler, the time it takes to enter a mode, reliability indicators, mode of operationAbstract
The paper reports an established analytical relation of the time it takes for a thermoelectric cooler to enter a stationary mode depending on the thermal-physical parameters of structural and technological elements, a temperature differential, relative working currents, electric resistances, and geometric parameters of thermoelements.
A mathematical model has been analyzed in terms of temporal and reliability indicators for different current modes of operation and temperature differentials taking into consideration energy indicators and structural parameters of the thermoelectric cooler.
It has been shown that an increase in the time it takes to enter a stationary mode for various drops in temperature decreases a relative working current, and the functional dependence of the refrigeration factor on the time it takes to enter a stationary mode has a maximum, depending on a temperature difference. At the predefined time of entering a stationary mode, the dependence of the number of thermoelements on temperature differential has a minimum. An increase in the time it takes to enter a constant mode decreases the relative failure rate and increases the likelihood of a failure-free operation of the thermoelectric cooler. An increase in temperature difference for different current regimes increases the time it takes to enter a stationary mode, increases the working current magnitude, reduces the refrigeration factor, increases the number of thermoelements and the intensity of failures.
We have given the calculation of the cooler with a predefined time of entering a stationary mode at the assigned temperature changes, external conditions, thermal load, the geometry of thermoelements' branches. The obtained results of the research make it possible to design single-cascade thermoelectric coolers with the predetermined dynamics of functioning and to predict basic parameters and reliability indicators over any time periodReferences
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Copyright (c) 2019 Vladimir Zaykov, Vladimir Mescheryakov, Yurii Zhuravlov
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