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8 papers
XVI International conference ''Thermoelectrics and their applications" - 2018 (ISCTA 2018), St. Petersburg, October, 2018
Cryogenic thermoelectric cooler at operating temperature below 90 K
N. A. Sidorenko,
Z. M. Dashevskii Ferrotec Nord Corporation, Moscow
Abstract:
It is considered the possibility of creating thermoelectric coolers for operating temperatures below 90 K. For these temperatures it is not possible to use a standard circuit of a thermoelement, consisting of two
$n$- and
$p$-semiconductor legs, connected in a series electrical circuit. In the area of cryogenic temperatures there is only an effective thermoelectric material of
$n$-type conductivity, based on solid solutions Bi–Sb. In this case thermoelements composed of thermoelectric
$n$-type leg and a passive leg, based on high temperature superconductor (HTSC) were studied. A thermoelectric cooler (module), consisting of six
$n$-type legs (extruded crystals Bi
$_{0.91}$Sb
$_{0.09}$) and passive legs based on HTSC (YBa
$_{2}$Cu
$_{3}$O
$_{7-x}$) films was designed. A magnetic field was used to increase thermoelectric figure of merit
$ZT$ of the cryogenic module. For created cryogenic module at hot side temperature
$T_h$ = 80 K, a current
$I$ = 6.4 A and a voltage
$U$ = 0.10 V the maximum value of temperature drop
$>$ 13.5 K and a maximum cooling capacity
$Q_c>$ 0.36 W were achieved.
Received: 07.02.2019
Revised: 10.02.2019
Accepted: 14.02.2019
DOI:
10.21883/FTP.2019.06.47723.32
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