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The R744 vapour compression test rig designed for visualisation of two-phase flow inside ejectors.

Number: pap. n. 1347

Author(s) : HAIDA M., FINGAS R., SZWAJNOCH W., et al.

Summary

Use of advanced experimental technique for the R744 two-phase flow observation inside the ejector is required to find a possibility of the ejector efficiency improvement. Hence, the CO2 refrigeration test facility dedicated to visualise the flow behaviour inside the ejector is presented. The test rig is designed and installed for operation analysis of freezers through air conditioning applications. The R744 vapour compression rack is equipped with the transparent ejector designed for the flow visualisation investigation. The ejector section was prepared in order to perform flow velocity and mixing process analyses using the Particle Image Velocimetry system and high-speed camera. The designed system let to investigate various shapes of the ejector cross-sections due to modular construction as well as another expansion devices, e.g., a capillary tube. The performance and main characteristics of the test rig was analysed on the basis of the coefficient of performance and the first-law analysis with and without the ejector.

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Pages: 9

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Details

  • Original title: The R744 vapour compression test rig designed for visualisation of two-phase flow inside ejectors.
  • Record ID : 30026105
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1347

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