Metrological systems for monitoring two-phase cryogenic flows

The designed, manufactured and certified devices and metrological systems to control the thermodynamic state of two- and single-phase cryogens are presented. These systems and the developed methodology provide an accuracy of calibration not more than ±5 mK for resistive temperature sensors in the ra...

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Bibliographic Details
Published in:Cryogenics (Guildford) 2000-04, Vol.40 (4), p.279-285
Main Authors: Filippov, Yu.P., Kovrizhnykh, A.M., Miklayev, V.M., Sukhanova, A.K.
Format: Article
Language:English
Subjects:
He I
He II
Hydrogen
Instrumentation
Permittivity
Sensors
Superfluid helium
Temperature control
Thermodynamics
Two-phase flow
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Summary:The designed, manufactured and certified devices and metrological systems to control the thermodynamic state of two- and single-phase cryogens are presented. These systems and the developed methodology provide an accuracy of calibration not more than ±5 mK for resistive temperature sensors in the range from 1.5 to 300 K and ±1.5% or less for radio frequency void fraction sensors intended for helium, hydrogen, nitrogen and others. The thermodynamic diagram temperature–dielectric permittivity for helium is presented as well.
ISSN:0011-2275
1879-2235
DOI:10.1016/S0011-2275(00)00040-0