| 摘要 |
The plant includes a precooling stage, a Joule/Thomson stage and a cryogenic load. The Joule/Thomson stage includes a pair of heat exchangers in which the helium emerging from the precooling stage is cooled by the return flow of helium. This stage also includes an expansion turbine between the heat exchangers to expand the high pressure helium to an intermediate pressure and an expansion element in which the helium is expanded to the liquefaction pressure. This expansion element is located upstream or downstream of the cryogenic load or between two parts of the cryogenic load.
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