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Enthalpy Determination Methods for Compressor Performance Calculations

[+] Author Affiliations
David Ransom, Klaus Brun

Southwest Research Institute® , San Antonio, TX

Rainer Kurz

Solar Turbines Inc., San Diego, CA

Paper No. GT2007-27038, pp. 1407-1413; 7 pages
doi:10.1115/GT2007-27038
From:
  • ASME Turbo Expo 2007: Power for Land, Sea, and Air
  • Volume 4: Turbo Expo 2007, Parts A and B
  • Montreal, Canada, May 14–17, 2007
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4793-4 | eISBN: 0-7918-3796-3
  • Copyright © 2007 by ASME

abstract

In the field of compressor performance simulation and measurement, the most commonly used method to evaluate compressor performance is based on the analysis of inlet and discharge pressures and temperatures. Combined with gas mixture properties and known mass flow rate, it is a simple process to determine overall compressor power and efficiency. However, the critical step in this process is the conversion of pressure, temperature, and gas property information into both actual and ideal enthalpy differences. In addition to the abundance of equation of state (EOS) formulations, there are also multiple methods commonly applied for the calculation of the enthalpy differences. This paper reviews several of the methods used for this critical calculation and provides a comparison using multiple gas compositions.

Copyright © 2007 by ASME
Topics: Compressors , Enthalpy

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