An Experience in the Maintenance of a Liquefier from the T-15 Cryogenic System, Results of Its Reliability and Capacity Enhancement
Simplification pneumatic-hydraulic circuit-diagram of the liquefiers for increasing reliability.
Start-up of the third turbine stages of the liquefiers. Piston expander and two variant of turbines were tested, only the last variant has demonstrated reliable and effective operation.
Work out and realization of technological and circuit-diagram solution (usage of preliminary helium purification from neon, development and assembly of a neon adsorber) against freezing neon and hydrogen impurities — changing the mass flow ratio — in the valves and heat exchangers.
Test of various prototype main turbines. Many prototype main turbines with various work pressure and various mass flow were tested. Turbines with optimal parameters have been selected.
At present, the Liquefier has the flow rate equal 0.222 L/s (800 L/h), at the compressed helium flow rate — 0.222 kg/s (800 kg/h), and the inlet Liquefier pressure — 2.2 MPa.
KeywordsGraphite Helium Neon Turboexpander
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