Magnetic refrigeration apparatus with heat pipes

Patent · Tue Feb 17 04:00:00 EST 1987

OSTI ID:6719987

Barclay, J A; Coyne, F

This patent describes an about 4 to about 20 K. refrigeration apparatus comprising: a magnetic field generating means; a fluid contactable magnetic material interacting with the magnetic field produced by the magnetic field generating means so as to be subjected to a cyclically time varying magnetic field; a fluid effective to transfer heat at temperatures between about 4 and about 20K.; an external heat sink; and at least two directional heat pipes, one such pipe disposed between the fluid and the object of cooling whereby heat from the object of cooling is transmitted through the fluid to the magnetic material when the magnetic material absorbs heat. Another such pipe is disposed between the fluid and the external heat sink whereby heat from the magnetic material when the magnetic material is rejecting heat is transmitted through the fluid to the external heat sink, and also whereby the heat from the hot ends of the directional heat pipes is minimally transmitted to the cold ends of the directional heat pipes.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4642994
• OSTI ID: 6719987
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COOLING
DESIGN
ENERGY TRANSFER
FLUIDS
HEAT PIPES
HEAT SINKS
HEAT TRANSFER
HEAT TRANSFER FLUIDS
MAGNETIC FIELDS
MAGNETIC MATERIALS
MAGNETIC REFRIGERATORS
MATERIALS
REFRIGERATORS
SINKS
TIME DEPENDENCE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE