Combined cycle power generation system

Whereas near-term appHcation of coal gasification is expected to be in the production of electricity through combined cycle power generation systems, longer term appHcations show considerable potential for producing chemicals from coal using syngas chemistry (45). Products could include ammonia, methanol, synthetic natural gas, and conventional transportation fuels. 

In contrast, gasification systems are far more efficient, reaching 60 percent, versus only 20-40 percent for some direct-fired plants.31 These types of systems heat the biomass in an environment where the solid biomass breaks down into a flammable gas, such as methane.This gas can then be used in more efficient combined-cycle power-generation systems... 

Spath, P.L. and Mann, M.K. Life cycle assessment of a natural gas combined-cycle power generation system. September 2000, NREL/TP-570-27715. http //www.nrel.gov/docs/fy00osti/27715.pdf. 

JCN Newswires MHI achieves 3,000 hour operation, unprecedented in Japan Iot SOFC/MGT combined-cycle power generation systems, 2 Oct 2009... 

Component Failure and Repair Data tor Gasification-Combined-Cycle Power Generation Units Power Failure rates and averages restore times from published, analytical, and judgment data Data for 121 system/component groups from Coal Gasification Combined-Cycle Units 108. 

Figure 1. A schematic of an integrated coal gasification system for fuel cell or combined-cycle-power-generation applications.

Today, Low-Btu Gas (LBG) is expected to be preferred in small demand applications for single users located outside of downtown metropolitan areas. Specific industries in which LBG is expected to be most competitive include primary metals, iron ore beneficia-tion, metal finishing, lime brick refractory, and food industries. Another potential market for Low-Btu Gas is in combined cycle power generation. Cleaned Low-Btu Gas may be particularly advantageous when a plant has many separate combustors which, because of the anticipated new environmental standards, would require either multiple scrubbers or a flue gas collection system. Cleaned Low-Btu Gas is also one of the few options available to a user planning a plant expansion in a non-attainment area. 

Figure 9-14. Combined Brayton-Rankine Cycle Fuel Cell Power Generation System... 

Pressurized FBC may make possible the use of coal in turbocharged combustors and combined cycle power systems. Success is dependent on reducing the erosive and corrosive character of hot, pressurized flue gas generated from coal combustion before expanding it through the system s gas turbine. The problems to be overcome are manifold. The usual requirement for reducing particulate emissions to environmentally acceptable levels is supplemented with stringent... 

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