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THE INFLUENCE OF MICROSPHERE DIAMETER ON THE COEFFICIENT OF THERMAL CONDUCTIVITY OF MICROSPHERE INSULATION.

Author(s) : WAWRYK R., RAFALOWICZ J., BALCEREK K.

Type of article: Article

Summary

MEASUREMENTS OF THERMAL CONDUCTIVITY BETWEEN 80 AND 300 K VERSUS TEMPERATURE FOR 3 MICROSPHERE SAMPLES OF DIFFERENT DIAMETER ARE PRESENTED. AN ANALYTICAL EQUATION FOR THE APPARENT COEFFICIENT OF THERMAL CONDUCTIVITY WAS ESTIMATED. THE COEFFICIENT WAS DIVIDED INTO THE CONDUCTION AND RADIATION COMPONENTS AND THE SOLID FRACTION FOR ALL MICROSPHERE SAMPLES WAS ESTIMATED. FOR ONE SAMPLE THE MEASUREMENT WAS REPEATED AFTER SOME SPECIAL TREATMENT AND A DROP IN THE THERMAL CONDUCTIVITY WAS OBSERVED, WHICH CONFIRMS THE EFFECT OF MICROSPHERE DIAMETER ON THE RADIATION CONTRIBUTION.

Details

  • Original title: THE INFLUENCE OF MICROSPHERE DIAMETER ON THE COEFFICIENT OF THERMAL CONDUCTIVITY OF MICROSPHERE INSULATION.
  • Record ID : 1984-2256
  • Languages: English
  • Source: Cryogenics - vol. 23 - n. 8
  • Publication date: 1983

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