Effect of Steam Injection in Gas Turbine Combustion Chamber on the Performance of a Natural Gas Fired Combined Cycle Power Generation Unit

Abstract:

Combined cycle power generation plants are becoming popular to generate power at higher efficiencies with reduced greenhouse gas emissions. In the present work the effect of steam injection in the gas turbine combustion chamber on the performance of a natural gas fired combined cycle power plant is investigated. For a particular combined cycle power generation configuration, the effect of steam injection on the performance is conducted based on first law of thermodynamics. The steam injection influences the work output and efficiencies of gas turbine, steam turbine and combined cycle power generation unit.

• Periodical: Applied Mechanics and Materials (Volumes 110-116)
• Pages: 4574-4577
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.110-116.4574
• Online since: October 2011
• Authors: Ibrahim Alaefour, Bale V. Reddy
• Keywords: Combined Cycle, Combustor, Energy Analysis, Gas Turbine, Power Generation, Steam Injection

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[4] B. Law, B.V. Reddy"., Performance simulation of a combined cycle power generation system with steam injection in the gas turbine combustion chamber, Paper: ES 2007-36258, in the proceedings of ASME Energy Sustainability Conference, Long Beach, California, USA, June 27-30, 2007. Figure 1: Schematic of combined cycle power plant with steam injection Figure 2: Effect of fraction injected steam on combined cycle, gas cycle and steam cycle net work output (TIT=1500K and Gas Turbine Pressure ratio =22) Figure 3: Effect of fraction of steam injection on topping cycle, bottoming cycle, and combined cycle efficiencies (TIT=1600K and Gas Turbine Pressure ratio =22).

DOI: 10.1115/es2007-36258