Helium Gas based Cryogenic Refrigerator (1kW at 20 K).
Cryogenic Technology Division has developed a cryogenic refrigerator for 1 kW of refrigeration at 20 К with helium gas as the refrigerant and installed at Engineering Hall no. 8, BARC, Trombay. This refrigerator can be used for cryo-distillation of hydrogen isotopes and has undergone operational tests The plant is based on reversed Brayton cycle with two stage turbine based expansion. The system, in effect, consists of a cold box housing components such as turboexpanders, brazed plate and fin heat exchangers, gas purifiers and piping with cryogenic extended stem valves together with temperature sensors, pressure transducers and vibration monitoring instrumentation for the turboexpanders.Сдается мне, что cold box housing (теплоизолированный кожух) и есть тот самый пресловутый "Turbine casing"....
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