What an operator dealing with a helium liquefaction plant should know. Persons who operate helium liquefaction plants. This educational session takes place within a four-day period (total time is around 28 hours).

• General reminders
  
• Theory of heat exchangers
  
• Basic thermodynamical cycles
  
• Liquid nitrogen pre-cooling

• The oil lubricated screw compressor
  
• The final oil removal system
  
• The heat exchangers
  
• The bearings for cryogenic rotating machines
  
• The cryogenic expansion turbine

• Process control in helium liquefaction
  
• Transient situations

• Pollution of helium
  
• Purification by adsorption
  
• Purification by cryo-trapping
  
• Helium analysis

Operational checks and maintenance of helium liquefaction plants

Visit of a liquefaction plant.