When low calorific value gases are fired, the performance and stability of gas turbines may deteriorate due to a large amount of inertballast and changes in working fluid properties. Since it is rather rare to have custom-built gas turbines for low lower heating value (LHV) operation, the engine will be forced to operate outside its design envelope. This, in turn, poses limitations to usable fuel choices. Typical restraints are decrease in Wobbe index and surge and flutter margins for turbomachinery. In this study, an advanced performance deck has been used to quantify the impact of firing low-LHV gases in a generic-type recuperated as well as unrecuperated gas turbine. A single-shaft gas turbine characterized by a compressor and an expander map is considered. Emphasis has been put on predicting the off-design behavior. The combustor is discussed and related to previous experiments that include investigation of flammability limits, Wobbe index, flame position, etc. The computations show that at constant turbine inlet temperature, the shaft power and the pressure ratio will increase; however, the surge margin will decrease. Possible design changes in the component level are also discussed. Aerodynamic issues (and necessary modifications) that can pose severe limitations on the gas turbine compressor and turbine sections are discussed. Typical methods for axial turbine capacity adjustment are presented and discussed.
Skip Nav Destination
Article navigation
Research Papers
Off-Design Performance Investigation of a Low Calorific Value Gas Fired Generic-Type Single-Shaft Gas Turbine
Magnus Genrup,
Magnus Genrup
Siemens Industrial Turbomachinery AB
, Finspong, Sweden
Search for other works by this author on:
Pontus Eriksson,
Pontus Eriksson
Department of Energy Sciences,
Lund University
, Lund 22100, Sweden
Search for other works by this author on:
Jens Klingmann
Jens Klingmann
Department of Energy Sciences,
Lund University
, Lund 22100, Sweden
Search for other works by this author on:
Raik C. Orbay
Magnus Genrup
Siemens Industrial Turbomachinery AB
, Finspong, Sweden
Pontus Eriksson
Department of Energy Sciences,
Lund University
, Lund 22100, Sweden
Jens Klingmann
Department of Energy Sciences,
Lund University
, Lund 22100, SwedenJ. Eng. Gas Turbines Power. May 2008, 130(3): 031504 (7 pages)
Published Online: April 2, 2008
Article history
Received:
May 10, 2007
Revised:
September 24, 2007
Published:
April 2, 2008
Citation
Orbay, R. C., Genrup, M., Eriksson, P., and Klingmann, J. (April 2, 2008). "Off-Design Performance Investigation of a Low Calorific Value Gas Fired Generic-Type Single-Shaft Gas Turbine." ASME. J. Eng. Gas Turbines Power. May 2008; 130(3): 031504. https://doi.org/10.1115/1.2836482
Download citation file:
Get Email Alerts
Cited By
Numerical Investigation of CO and NO Production From Premixed Hydrogen/Methane Fuel Blends
J. Eng. Gas Turbines Power (April 2025)
An Efficient Uncertainty Quantification Method Based on Inter-Blade Decoupling for Compressors
J. Eng. Gas Turbines Power (April 2025)
Experimental Design Validation of a Swirl-Stabilized Burner With Fluidically Variable Swirl Number
J. Eng. Gas Turbines Power (April 2025)
Experimental Characterization of a Bladeless Air Compressor
J. Eng. Gas Turbines Power (April 2025)
Related Articles
Dynamic Simulation of Full Startup Procedure of Heavy-Duty Gas Turbines
J. Eng. Gas Turbines Power (July,2002)
Component Map Generation of a Gas Turbine Using Genetic Algorithms
J. Eng. Gas Turbines Power (January,2006)
Aspects of Cooled Gas Turbine Modeling for the Semi-Closed O 2 / CO 2 Cycle With CO 2 Capture
J. Eng. Gas Turbines Power (July,2004)
An Adaptation Approach for Gas Turbine Design-Point Performance Simulation
J. Eng. Gas Turbines Power (October,2006)
Related Chapters
Outlook
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Combined Cycle Power Plant
Energy and Power Generation Handbook: Established and Emerging Technologies
Performance Testing of Combined Cycle Power Plant
Handbook for Cogeneration and Combined Cycle Power Plants, Second Edition