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Challenges on the development of a CO2 compressor focusing on structural strength and reliability.

Author(s) : BOSCO R., WEBER G.

Summary

When designing a compressor to withstand such high pressure inherited from the CO2 transcritical cycle, the structural strength and reliability of the compressor and its components is a challenge. As a consequence the external housing design must be much more focused on the structural strength than on the acoustic performance, as mostly observed in low pressure refrigeration cycles. Concerning the mechanism reliability some mandatory requirements must be evaluated like minimal oil thickness on the bearings, keeping the friction and hydrodynamic power losses as minimal as possible. Thus, is mandatory a simultaneous design approach including advanced structural analysis, fluid structural interaction, experimentation, safety codes revision, and computer aided engineering tools application. The aim of this work is summary the challenges dealt in the development of the CO2 compressor housing focusing in advanced structural analysis and bearings designs. Numerical and experimental results are present depicting fatigue, collapse load, bearing design, and also experimental stress result and extended laboratory tests.

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Pages: 2008-2

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Details

  • Original title: Challenges on the development of a CO2 compressor focusing on structural strength and reliability.
  • Record ID : 2009-0105
  • Languages: English
  • Source: 8th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2008)
  • Publication date: 2008/09/07

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