Reliably-oriented analysis of a single stage cooler thermoelement construction
DOI:
https://doi.org/10.15587/2312-8372.2017.100058Keywords:
thermoelectric coolers, operating mode, reliability indicators, geometry of thermoelement branchesAbstract
The object of research is a model of the relationship between the reliability indicators of a single stage thermoelectric cooler and the geometry of the thermoelement, i.e., the ratio of its length to the cross-sectional area. Existing studies are limited to analyzing the influence of the geometry of thermoelements on the performance of cooling capacity, so the aim of the analysis is to determine the possibility of improving reliability in various modes of cooler operation. As a method of research, mathematical modeling is chosen, which allows to predict the reliability of coolers at the design stage. The influence of the geometry of thermoelements in the range from 4.5 to 20 on the power and structural parameters of the thermoelectric cooler is analyzed to select the best option for the criterion of the minimum failure rate. The analysis is performed for temperature differences in the range of the device's operability from 0 K to 60 K and operating modes from the maximum of the cooling capacity to the minimum of the failure rate taking into account energy and design constraints. An example of the use of the proposed analysis using unified thermoelectric modules is presented, which shows the possibility of reducing the relative failure rate of a thermoelectric cooler by more than 3 times due to the choice of the geometry of thermoelements. The main advantage of the proposed approach is that it is possible to increase the reliability of thermoelectric coolers without changing the production technology and used materials.
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Copyright (c) 2017 Vladimir Zaykov, Vladimir Mescheryakov, Yurii Zhuravlov
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