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Research Papers: Power Engineering

Thermodynamic Analysis and Comparison on Oxy-Fuel Power Generation Process

[+] Author and Article Information
Shimin Deng, Rory Hynes

 Hatch Energy, 1235 North Service Road West, Oakville, ON, L6M 2W2, Canada

J. Eng. Gas Turbines Power 131(5), 053001 (May 28, 2009) (7 pages) doi:10.1115/1.3078204 History: Received July 30, 2008; Revised November 11, 2008; Published May 28, 2009

In this paper, pressurized oxy-fuel combustion power generation processes are modeled and analyzed based on a 350 MW subcritical reheat boiler associated with a condensing steam turbine. The performance results are obtained. Furthermore, the influences of slurry concentration and coal properties on power plant performance are investigated. An oxy-fuel configuration operating at ambient pressure is studied to compare the performance with pressurized oxy-fuel configuration. Thermodynamic analysis reveals the true potentials of the pressurized oxy-fuel process. Based on the system integration, an improved configuration is proposed in which plant efficiency of pressurized oxy-fuel process is increased by 1.36%.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

Pressurized oxy-fuel combustion power plant schematic

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Figure 2

Power plant net efficiency versus slurry concentration

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Figure 3

T-Q diagram of CHE for two different slurry concentration cases

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Figure 4

Ambient oxy-fuel combustion power plant schematic

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Figure 5

Improved pressurized oxy-fuel combustion power plant schematic

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