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POOL BOILING HEAT TRANSFER TO SATURATED LIQUID HELIUM ON COATED SURFACES.

[In Japanese. / En japonais.]

Author(s) : CHANDRATILLEKE G. R., NISHIO S.

Type of article: Article

Summary

IN THE CASE OF POOL BOILING HEAT TRANSFER, THE THICKNESS OF THE INSULATING COATING ON A SUPERCONDUCTOR IS A CRITICAL FACTOR IF THE FILAMENTS OF A SUPERCONDUCTING MAGNET HAVE TO BE OPERATED AT THEIR MAXIMUM OPERATING CURRENT. IN THE STUDY, BOILING EXPERIMENTS ON A CIRCULAR FLAT PLATE WERE CARRIED OUT TO ASSESS THE INFLUENCE OF SURFACE COATING THICKNESSES ON HEAT TRANSFERTO SATURATED LIQUID HELIUM AT ATMOSPHERIC PRESSR. THE COATING MATERIALS USED WERE STAINLESS STEEL AND POLYTETRAFLUOROETHYLENE BECAUSE THEIR PROPERTIES ARE WELL KNOWN. FILM BOILING, HOWEVER, IS NOT AFFECTED BY THE SURFACE COATING. EXPERIMENTAL DATA WAS USED TO DERIVE A NON-DIMENSIONAL RELATION DESCRIBING THE INFLUENCE OF THE COATING THICKNESS ON THE MINIMAL HEAT FLUX AND THE DEGREES OF SUPERHEAT AT THE CRITICAL AND MINIMAL HEAT FLUX POINTS.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1989-0866
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 23 - n. 3
  • Publication date: 1988
  • Document available for consultation in the library of the IIR headquarters only.

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