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A GUARDED PARALLEL-PLATE INSTRUMENT FOR MEASURING THE THERMAL CONDUCTIVITY OF FLUIDS IN THE CRITICAL REGION.

Author(s) : MOSTERT R., BERG H. R. van den, GULIK P. S. van der

Type of article: Article

Summary

A DESCRIPTION IS GIVEN OF THE CONSTRUCTION AND OPERATING PROCEDURE OF A PARALLEL-PLATE APPARATUS FOR THE MEASUREMENT OF THE THERMAL CONDUCTIVITY COEFFICIENT OF FLUIDS. THIS INSTRUMENT CAN BE OPERATED AT PRESSURES UP TO 150 MEGAPASCALS AND AT TEMPERATURES DOWN TO 77 K. THE USE OF PLATINUM RESISTANCE TEMPERATURE SENSORS ALLOWS MEASUREMENTS WITH TEMPERATURE DIFFERENCES BETWEEN UPPER AND LOWER PLATE AS SMALL AS 1 MILLIK, WHICH TOGETHER WITH THE SMALL PLATE SEPARATION OF 155 MICROMETER, MAKES THE INSTRUMENT SUITABLE FOR BOTH THE NORMAL FLUID REGION AS WELL AS FOR THE REGION VERY CLOSE TO THE CRITICAL POINT. THE COMPLETE WORKING EQUATIONS FOR THE INSTRUMENT ARE PRESENTED AND EVALUATED.

Details

  • Original title: A GUARDED PARALLEL-PLATE INSTRUMENT FOR MEASURING THE THERMAL CONDUCTIVITY OF FLUIDS IN THE CRITICAL REGION.
  • Record ID : 1990-1859
  • Languages: English
  • Source: Rev. sci. Instrum. - vol. 60 - n. 11
  • Publication date: 1989
  • Document available for consultation in the library of the IIR headquarters only.

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