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Wall temperature measurement in a herringbone microfin evaporation tube.

Author(s) : WELLSANDT S., VAMLING L.

Summary

This paper deals with the wall temperature measurement in a herringbone tube. The herringbone tube tested was made of copper with an outer diameter of 9.52 mm and a wall thickness of 0.3 mm. An experimental facility was constructed to enable thorough local heat transfer and pressure drop measurements at ten subsections along a four-meter tube. The circumferential temperature distribution of the outer wall of the tube was measured by means of thermocouples, which were laser-welded onto the top, bottom, right and left side of the tube. The task of measuring temperatures in temperature gradients as well as very small temperature differences is a very difficult one. Therefore this paper focused on the applied measurement techniques as well as error analyses and discussed resulting accuracies. Initial measurement results are shown and the possibility of using local temperature measurements to detect changes in flow patterns is discussed.

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Details

  • Original title: Wall temperature measurement in a herringbone microfin evaporation tube.
  • Record ID : 2004-2138
  • Languages: English
  • Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Publication date: 2003/08/17

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