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Numerical investigation of carbon dioxide and POE oil mixture behavior in an accumulator in trans-critical heat pump mode.

Number: 2216

Author(s) : ZHANG W., HRNJAK P.

Summary

Carbon dioxide is one of the most promising next-generation refrigerants for air-conditioning applications in electric vehicles because it has the advantages of good heating performance in cold climates and environmental-friendly properties. Nonetheless, there are limited data about reversible CO2 heat pump systems for component-level performance and design. This paper focuses on the impact of different sizes of oil bleed hole on the liquid level and local pressure drop in the accumulator through CFD simulation. Also, we applied the experimental data obtained with a full CO2 HP system for the boundary conditions and the measured properties of liquid POE-CO2 for the materials in the simulation. The cases with different sizes of the oil bleed hole are investigated using the commercial computational fluid dynamics software Fluent. The results of this paper can be used to design the accumulator and improve 1-D models for reversible systems so that it can operate well in both air-conditioning and heat pump modes.

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Pages: 10

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Details

  • Original title: Numerical investigation of carbon dioxide and POE oil mixture behavior in an accumulator in trans-critical heat pump mode.
  • Record ID : 30028441
  • Languages: English
  • Subject: Technology
  • Source: 2021 Purdue Conferences. 18th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2021/05
  • Document available for consultation in the library of the IIR headquarters only.

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