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Advanced Cycles Large-Scale Aero-Derivative Gas Turbines: Performance Comparison

Journal of Power and Energy Engineering 2016年第5期4卷 7-19页

作者： Barinyima Nkoi Thank God Ebi Isaiah Department of Mechanical Engineering Rivers State University of Science and Technology Port Harcourt Nigeria Department of Mechanical Engineering Niger Delta University Wilberforce Island Nigeria

This paper aims at carrying out comparative performance analysis of simple and advanced cycles large-scale aero-derivative industrial gas turbines derived from aircraft turbofan engines. The investigation involves technical performances of three large-scale aero-derivative engine cycles based on existing and projected cycles for applications in land based power generation and Combined-Heat-and-Power (CHP). Preliminary design and performance simulation were implemented of a simple cycle (baseline) three-spool 100 MW aero-derivative engine model, intercooled and intercooled/recuperated engine cycles of the same 100 MW nominal power rating. In the analysis, design point and off-design performances of the engine models were established. The results indicate that to a large extent, the advanced engine cycles showed superior performance in terms of thermal efficiency, and fuel flow. In numerical terms, thermal efficiencies of intercooled engine cycle, and intercooled/recuperated engine cycles, over the simple cycle at design point increased by 2.42% and 0.94% respectively, whereas heat rates of these cycles over simple cycle at design point decreased by 2.37% and 0.93% respectively. It is worthy of note that for large-scale aero-derivative gas turbines having power rating of 100 MW and above, intercooled cycle would consume less fuel than intercooled-recuperated and simple cycles. This finding would actually aid good choice of cycle option for large-scale aero-derivative gas turbine designers, manufacturers and users.

关键词： Aero-Derivative-Gas-Turbines Thermal-Efficiency intercooled-recuperated Fuel-Flow Heat-Rate

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