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

Number: 1242

Author(s) : PAKULSKI T., BHANOT V., HERPIN Y., VERLAAT B.

Summary

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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Details

  • Original title: Two-phase CO2 pressure drop measurements in vertical and horizontal coaxial transfer lines for cooling high-energy physics detectors.
  • Record ID : 30032742
  • Languages: English
  • Source: 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2024). Proceedings. University of Maryland, College Park, Maryland, USA, August 11-14 2024
  • Publication date: 2024/08
  • DOI: http://dx.doi.org/10.18462/iir.gl2024.1242

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