Modeling and Simulation of MGT-70 Gas Turbine start-up procedure

Document Type : Research Article

Authors

1 Department of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran 2

2 Department of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran

3 Process Control Eng., TUGA Co., Malard, Karaj, Iran

Abstract

In this paper, the transient behavior of heavy duty gas turbines in the starting regime is analyzed and its characteristics are evaluated. Starting a gas turbine is quasi-transient process. So, the integral form of unsteady conservation equations and the ideal gas state equation are used in order to model the system. A new method is proposed to analyze the compressor performance of gas turbine during start-up condition. Compressor stages are grouped into three categories (front, middle, rear), which each of them have a different performance curve in low-speed. Also, the effects of the inter-stage bleed valves modulation are investigated. Finally, the dynamic behavior of a 160 MW MAPNA gas turbine is simulated during start-up condition. The simulation results are compared with the field data and a good agreement is between them. This research has shown the important rule of an exact estimation of start-up procedure (fuel, blow off valves, power of starter motor) for stable operation of compressor and, eventually, of the gas turbine.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 49, Issue 2
August 2017
Pages 363-370

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