Operational history of Fermilab's 1500 W refrigerator used for energy saver magnet production testing
The 1500 W helium refrigerator system utilizes two oil-injected screw compressors staged to feed a liquid nitrogen pre-cooled cold box. Refrigeration is provided by two Sulzer TGL-22 magnetic/gas bearing turbines. The refrigerator feeds six magnet test stands via a 10,000 L dewar and subcooler equipped distribution box. The design of the controls has permitted the system to be routinely operated 24 hours/day, seven days/week with only five operators. It has operated approximately 90% of the 4-1/2 years prior to shutting down in 1984 for a period of one year to move the compressor skid. Scheduled maintenance, failures, repairs and holidays are about equal to the 10% off time. The equipment described was used to test approximately 1200 superconducting magnets for the Fermilab accelerator ring. The seven year operating experience is presented as an equipment and technique review. Compressor hours currently exceed 42,000 and turbine hours exceed 39,000 each. Failure rates, causes, preventive maintenance, monitoring practices and equipment, and modifications are examined along with notes on some of the more successful applications of technique and equipment. 4 refs.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 5184269
- Report Number(s):
- FNAL-TM-1353; CONF-850814-17; ON: DE86000641; TRN: 85-023432
- Resource Relation:
- Conference: Cryogenic engineering conference and international cryogenic materials conference, Boston, MA, USA, 12 Aug 1985; Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
FERMILAB ACCELERATOR
REFRIGERATORS
SUPERCONDUCTING MAGNETS
CRYOGENICS
PERFORMANCE
POWER RANGE 1-10 KW
ULTRALOW TEMPERATURE
ACCELERATORS
CYCLIC ACCELERATORS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
MAGNETS
SUPERCONDUCTING DEVICES
SYNCHROTRONS
430303* - Particle Accelerators- Experimental Facilities & Equipment
420201 - Engineering- Cryogenic Equipment & Devices