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Characteristics of self-evaporation behaviour of sprinkled water near the triple point.

Author(s) : AIZAWA K., HAYASHI K., OGOSHI H., et al.

Type of article: Article

Summary

For the sake of capturing the basic data with a view to designing vacuum evaporation apparatus characteristics, the self-evaporation behaviour of sprinkled water near the triple point has been investigated experimentally. The relationship between the amounts of the vapourized water and the pressure in the vessel was elucidated quantitatively on the condition that over-heated water was sprinkled from water supplying nozzles with a diameter of 4 mm into the centre of the steam area in the heat insulation glass evaporation vessel having a diameter of 200 mm and a height of 1100 mm. Even under the mild water sprinkling conditions such as no small particle formation, small Reynolds number, and small Weber number, the temperature effectiveness of the self-evaporation in the centre of the steam was as high as 80%, which clearly shows the effectiveness of this water-sprinkling method. In addition, the basic data for system designing such as water evaporation coefficient from water layer surface and temperature effectiveness of self-evaporation during the flight in the steam space were obtained.

Details

  • Original title: Characteristics of self-evaporation behaviour of sprinkled water near the triple point.
  • Record ID : 2005-1703
  • Languages: English
  • Source: Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers - vol. 21 - n. 2
  • Publication date: 2004

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