Coal-Fueled Gas Turbine Hot End Simulation Rig Design and Development PUBLIC ACCESS

[+] Author Affiliations
M. A. Galica, M. D. Stephenson, J. Aurrecoechea

Solar Turbines Incorporated, San Diego, CA

Paper No. 91-GT-289, pp. V003T05A011; 6 pages
  • ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Orlando, Florida, USA, June 3–6, 1991
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7900-9
  • Copyright © 1991 by ASME


Effects of the exhaust of a coal fueled gas turbine combustion system on turbine hot section materials and coatings are being determined. A system has been developed to evaluate currently used turbine materials and coatings exposed to coal combustion exhaust. Using an engine to test these materials is not feasible due to the inordinately expensive fuel costs associated with running the engine. Therefore, a scaled-down Hot End Simulation Rig (HESR) was designed and built to economically evaluate turbine components operating with a coal-water mixture (CWM) flow rate of 3.8–7.6 liters/hour (1–2 gallons/hour). The rig incorporates primary and secondary combustion zones, a ceramic barrier filter, and a housing for the material samples. Cooling air is metered to the samples to simulate the material temperatures of subsequent turbine stages. Because of the small scale of the rig, much development focused on the design of an adequate fuel injector that would operate reliably for long periods without plugging. Long-term testing is planned to subject the test specimens to coal exhaust using the alkali level in the fuel as the principle variable. An initial level of 300 ppm is used for a 1000 hour preliminary test. The design, development, and test procedure of the HESR are discussed.

Copyright © 1991 by ASME
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