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Centrifugal Compressor Polytropic Performance: Consistently Accurate Results From Improved Real Gas Calculations

[+] Author Affiliations
B. Fred Evans, Spencer R. Huble

Chiyoda International Corporation, Houston, TX

Paper No. GT2017-65235, pp. V009T27A028; 19 pages
doi:10.1115/GT2017-65235
From:
  • ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
  • Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy
  • Charlotte, North Carolina, USA, June 26–30, 2017
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5096-1
  • Copyright © 2017 by ASME

abstract

This paper compares various methods employed to determine centrifugal compressor performance. Results show that classic Schultz style end point analyses prescribed by ASME PTC 10 [1], [2] can be augmented by numerical stepwise techniques that provide consistently accurate results without limiting assumptions. A small stage method very closely approaching the classical definition of polytropic analysis is implemented in which the accuracy of the results only depends upon the quality of the applied fluid equation of state. It is no longer necessary to distinguish between ideal and real gas methods since real gas methods are easy to implement using today’s computational tools.

Copyright © 2017 by ASME
Topics: Compressors

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