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A proposed centrifugal refrigeration compressor rating method.

Number: pap. n. C10, 1351

Author(s) : BRASZ J. J.

Summary

There are currently no test codes and performance standards available for rating of centrifugal refrigeration compressors, like the ANSI/ARI standard 540 for positive displacement refrigerant compressors. The reason for this lack of a standard is the fact that until recently centrifugal compressors were not sold separately but always as part of a centrifugal chiller package. The need of the end customer could be met with ARI standard 550-590 that specifies how to measure chiller performance and ASHRA standard 90.1 that dictates minimum chiller efficiency requirements. With centrifugal refrigeration compressor manufacturers offering stand-alone compressors to OEM’s for new chiller development duty as well as retrofit applications, a need for standards on how to test and rate centrifugal refrigeration compressors as individual components has surfaced. This paper discusses the issues involved in representing the performance of centrifugal refrigeration compressors for water- and air-cooled chiller duty. The polynomial performance representation of positive displacement compressors as prescribed by the positive displacement refrigeration compressor standard ANSI/ARI 540 fails to accurately describe centrifugal compressor behavior. The ASME-PTC10 power test code for centrifugal and axial compressor, used extensively by manufacturers serving the air compression and the petrochemical industry, is a more appropriate testing code for centrifugal compresors but is limited in scope to the aerodynamic performance of the compressor, neglecting mechanical, electrical and motor/inverter cooling losses important for the overall efficiency of a refrigeration compressor. An extension of the ASME PTC-10 code to include these effect is required for rating centrifugal refrigeration compressors installed on closed loop chillers.

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Pages: 7 p.

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Details

  • Original title: A proposed centrifugal refrigeration compressor rating method.
  • Record ID : 30001343
  • Languages: English
  • Subject: Regulation
  • Source: 2010 Purdue Conferences. 20th International Compressor Engineering Conference at Purdue.
  • Publication date: 2010/07/12

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