Critical quality prediction for saturated flow boiling of CO2 in horizontal small diameter tubes

Rin Yun, Yong Chan Kim

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The dryout for flow boiling carbon dioxide (CO2) in horizontal small diameter tubes is investigated through experiment and theoretical modeling. Tests are conducted in conditions where the saturation temperature is 0, 5, and 10 °C, heat flux is 7.2-48.1 kW/m2 and mass flux is 500-3000 kg/m2 s. The dryout phenomena of CO2 are similar with those of water in many respects, while the effects of mass flux on dryout show differences among them. The dryout of CO2 is predicted by a theoretical dryout model, which is developed and verified with steam-water data. Two entrainment mechanisms of interface deformation and bubble bursting are considered in the model and dryout is determined when the liquid film thickness is less than the critical liquid film thickness, the criteria film thickness of dryout. The present model well predicts the experimental critical qualities except when mass flux is relatively high, at which the deposition of liquid droplet on the liquid film and the occurrence of dryout patches become very significant.

Original languageEnglish
Pages (from-to)2527-2535
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume46
Issue number14
DOIs
Publication statusPublished - 2003 Jul 1

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Keywords

  • CHF model
  • CO
  • Dryout
  • Evaporation

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy(all)
  • Mechanical Engineering

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