IMPROVING THE RELIABILITY OF SINGLE-STAGE THERMOELECTRIC COOLING DEVICES BY THE USE OF VARIOUS COMBINATIONS OF ORIGINAL MATERIALS OF EQUAL EFFICIENCY

The article represents possibilities of improving the reliability of single-stage thermoelectric cooling device by using different combinations of the original materials averaged parameters of the same efficiency, namely, thermoelectric power factor, electrical conductivity and the thermal conductivity for various changes in temperature and operating modes for a given height to the cross-sectional area branches of the thermocouple. There were obtained simple analytical expressions that provide the interconnection of reliability, namely, failure rate, the number of thermocouples of thermoelectric cooling capacity single-stage thermoelectric cooling device for different combinations of parameters of the source material. The calculations of single-stage thermoelectric devices basic parameters for different operating modes on the mode of maximum cooling capacity to minimum failure rates for different ranges of temperature changes from 0 to 60 K, and various combinations of options thermoelectric materials with differing efficiency parameters, electrical conductivity, thermoelectric power factors, the geometric parameters of thermocouples are presented. It is shown the possibility of failure rate reducing and increasing of cooler failure-free operation probability through the use of original materials with the same efficiency for greater conductivity.