FIELD: heat exchange.
SUBSTANCE: heat exchanger (5) comprises a heat-conducting cylindrical container (40), at least one heat-conducting pipe (30), cooling column (90) and cryogenic cooling head (100). Cooling tower and cooling head condensed gaseous helium into liquid helium to maintain the margin of liquid helium in heat-conducting cylindrical container (40). At least one heat-conducting pipe (30) is wound in a circumferential direction around the container (40) and at least one heat exchanger (20) of the coil of superconducting magnet and back. Tube forms a closed circuit, which contains gaseous helium at pressure approximately 104 bar (1,500 psi) at room temperature to 0.75 bar at cryogenic temperatures.
EFFECT: disclosed is a highly efficient heat exchanger for cryogen-free magnet for magnetic resonance imaging (MRI).
15 cl, 4 dwg
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