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Experimental investigation of two-phase flow characteristics of LiBr/H2O solution through orifice plates in vacuum environment.

Author(s) : WANG S., XIE X., JIANG Y.

Type of article: Article, IJR article

Summary

A new type of multi-stage elementary unit for generating and condensing processes in absorption heat pumps was introduced. One stage of the elementary unit was built, in which the LiBr/H2O solution was concentrated by flash evaporation when flowing through an orifice plate to the generating space. Experiments were carried out to study the flow characteristics of LiBr/H2O solution through an orifice plate in generating processes. The experimental results showed that the reduction of the mass flow rate of the two-phase flow reached a maximum of 24.5%. The mass fraction of gas of the two-phase flow was proportional to its superheat. When the mass transfer pressure difference was higher than 7 kPa or the mass fraction of gas was larger than 0.70%, the flow was choked, and the flow coefficient was reduced as the mass fraction of gas increased, reaching a minimum value of 0.64. A regression model for the flow coefficient of the two-phase LiBr/H2O solution was obtained.

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Pages: 267-274

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Details

  • Original title: Experimental investigation of two-phase flow characteristics of LiBr/H2O solution through orifice plates in vacuum environment.
  • Record ID : 30010367
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 38
  • Publication date: 2014/02

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