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CO2 transcritical compressors.

Author(s) : PISANO G., DALLAI M.

Summary

Carbon dioxide (R744 - CO2) is nowadays considered one of the most attractive long term solutions for commercial and industrial refrigeration applications, as well as for hot water heat pumps. This refrigerant thermodynamic characteristics lead to somewhat high discharge temperatures (up to 200°C), this having a significa nt impact on both oil temperature, thus affecting its lubricity, and refrigerant suction temperature and density, thus affecting compressor volumetric and isentropic efficiency. Therefore, improving discharge gas heat rejection it is possible to increase both compressor reliability and efficiency. This work is aiming to offer a qualitative analysis of how different design concepts impact on compressor heat transfer and dissipation, leading to diverse performances both in terms of reliability and efficiency.

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Pages: 4 p.

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Details

  • Original title: CO2 transcritical compressors.
  • Record ID : 30005688
  • Languages: English
  • Source: Green new deal - green economy. The latest technology in refrigeration and air conditioning: energy issues and climate change, new refrigerants, new European regulations, new plants. XIV European Conference: June 10-11, 2011, Milan.
  • Publication date: 2011/06/10

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