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Document IIF

Mesures de la chute de pression du CO2 diphasique dans des lignes de transfert coaxiales verticale et horizontale pour le refroidissement de détecteurs de physique des hautes énergies.

Two-phase CO2 pressure drop measurements in vertical and horizontal coaxial transfer lines for cooling high-energy physics detectors.

Numéro : 1242

Auteurs : PAKULSKI T., BHANOT V., HERPIN Y., VERLAAT B.

Résumé

Several particle detectors at CERN need new evaporative CO2 cooling systems for the High-Luminosity upgrade of the Large Hadron Collider. The design of these systems requires robust predictions of two-phase CO2 pressure drops through counterflowing coaxial transfer lines at saturation temperatures below -35 °C and mass fluxes up to 500 kg/m2s, but empirical data and analytical models in this saturation temperature range and flow configuration are scant. A transfer line consisting of a DN50 two-phase return pipe containing a 25.4 mm outer diameter liquid supply pipe was therefore instrumented and connected between an evaporative CO2 cooling system at CERN and a 100 kW heat load. We report the resulting pressure drop measurements for mass fluxes up to 700 kg/m2s, vapor qualities up to 70%, and saturation temperatures as low as -45 °C in three flow orientations: vertical up, horizontal, and vertical down.

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Pages : 10 p.

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Détails

  • Titre original : Two-phase CO2 pressure drop measurements in vertical and horizontal coaxial transfer lines for cooling high-energy physics detectors.
  • Identifiant de la fiche : 30032742
  • Langues : Anglais
  • Source : 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2024). Proceedings. University of Maryland, College Park, Maryland, USA, August 11-14 2024
  • Date d'édition : 08/2024
  • DOI : http://dx.doi.org/10.18462/iir.gl2024.1242

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