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Connection of Thermal and Emissions- Performance of GT-Plants

[+] Author Affiliations
Axel W. von Rappard

Gas Turbine Consulting, Surprise, AZ

Helmer Andersen

ALSTOM Power, Inc.

Paper No. GT2006-91069, pp. 555-564; 10 pages
  • ASME Turbo Expo 2006: Power for Land, Sea, and Air
  • Volume 4: Cycle Innovations; Electric Power; Industrial and Cogeneration; Manufacturing Materials and Metallurgy
  • Barcelona, Spain, May 8–11, 2006
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4239-8
  • Copyright © 2006 by ASME


The new issue of the PTC22 performance test code explains the evaluation of power and heat rate, as well the determination of the exhaust gas mass flow and its composition. The verification of emission requirements is normally tested independently from the thermal performance test and the actual EPA methods refer normally to an extensive determination of the exhaust gas flow, by measuring the velocity profile in the stack or the exhaust gas system of the gas turbine. This paper explains an easier way of determining the exhaust gas volume- or mass flow that is used as reference for all emission data. Additionally it shows that the emission measurement can easily be used as a verification of the exhaust gas mass flow determined in the thermal performance test. The basis for both tests is, however, an accurate fuel flow measurement. Since this measurement is also used for the heat rate or thermal efficiency determination it can certainly be used for the verification of the emissions performance. An uncertainty analysis has been added as well. The authors try to explain the procedure in a way the performance engineers on site can understand.

Copyright © 2006 by ASME



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