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7. Process control
It enables control actions to be carried out precisely and in good time. The operator can monitor machine parameter values, plot trend curves, etc. Modern small and medium-sized liquefiers and refrigerators are now always automatically controlled by a process controller, usually integrated into the cold box module for smaller machines.
A large refrigerator the size of those installed at CERN is controlled by around 40 control loops! Let's take a look at a few aspects of liquefier/fridge control.
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Process control
Bibliography
Also in our database
Software tools
CRYODATA http://www.cryodata.com/
Cryodata develops software for calculating the thermodynamic properties of fluids and solids, with a focus on cryogenic temperatures.
GASPAK calculates 28 thermophysical properties of 36 fluids with boiling points between 4 K and room temperature.
...
Events
International Cryogenic Engineering Conference (ICEC) http://mgt-icec.web.cern.ch/mgt-icec/
International conference held every even-numbered year, in Europe or other continents except North America.
Patents
US patent 5 499 505 dated 03/19/1996, Helium refrigerator with compressor control
US patent 5 941 095 dated 08/24/1999, Process for compressing a gas at low temperature and low pressure, corresponding compression line and refrigeration plant.
Directory
Manufacturers
Air Liquide Advanced Technology (AL.AT)
Helium liquefiers and refrigerators, helium scrubbers, etc. http://www.airliquideadvancedtechnologies.com/
Linde Kryotechnik AG
Helium liquefiers and refrigerators, helium scrubbers, etc.
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The Ultimate Scientific and Technical Reference