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Measurements of multilayer insulation (MLI) at high boundary temperature, using a simple non-calorimetric method.

Author(s) : MAZZONE L., RATCLIFFE G., RIEUBLAND J. M., et al.

Summary

The authors establish the thermal performance of MLI between 300 and 77 or 4 K, without bringing calorimetric methods into play, through the accurate measurement of a temperature profile. A cylinder in thin copper, wrapped with MLI, is cooled at one extremity while suspended under vacuum inside a sheath at room temperature. For known thermal conductivity and thickness of the tube, the heat flux can be inferred from the temperature profile. In-situ measurement of the thermal conductivity is obtained by applying a known heat flow at the warm extremity of the cylinder. Results, cross-checked with a calibrated heat meter, compare well with what previously obtained on a large-scale measuring facility.

Details

  • Original title: Measurements of multilayer insulation (MLI) at high boundary temperature, using a simple non-calorimetric method.
  • Record ID : 2006-0161
  • Languages: English
  • Source: Proceedings of the nineteenth International Cryogenic Engineering Conference. ICEC 19.
  • Publication date: 2002/07/22

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