Analysis of oxy-fuel combustion power cycle utilizing a pressurized coal combustor
Name
J.Hong et al. Energy 34(9) 2009 1332-1340.pdf
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Author(s)
Gazzino, Marco
Hong, Jongsup
Chaudhry, Gunaranjan
Brisson II, John G
Field, Randall
Ghoniem, Ahmed F
Date Issued
June 2009
Journal
Energy
Publisher
Elsevier
Citation
Hong, Jongsup, Gunaranjan Chaudhry, J. G. Brisson, Randall Field, Marco Gazzino, and Ahmed F. Ghoniem. “Analysis of Oxy-Fuel Combustion Power Cycle Utilizing a Pressurized Coal Combustor.” Energy 34, no. 9 (September 2009): 1332-1340.
Version
Author's final manuscript
Abstract
Growing concerns over greenhouse gas emissions have driven extensive research into new power generation cycles that enable carbon dioxide capture and sequestration. In this regard, oxy-fuel combustion is a promising new technology in which fuels are burned in an environment of oxygen and recycled combustion gases. In this paper, an oxy-fuel combustion power cycle that utilizes a pressurized coal combustor is analyzed. We show that this approach recovers more thermal energy from the flue gases because the elevated flue gas pressure raises the dew point and the available latent enthalpy in the flue gases. The high-pressure water-condensing flue gas thermal energy recovery system reduces steam bleeding which is typically used in conventional steam cycles and enables the cycle to achieve higher efficiency. The pressurized combustion process provides the purification and compression unit with a concentrated carbon dioxide stream. For the purpose of our analysis, a flue gas purification and compression process including de-SO[subscript x], de-NO[subscript x], and low temperature flash unit is examined. We compare a case in which the combustor operates at 1.1 bars with a base case in which the combustor operates at 10 bars. Results show nearly 3% point increase in the net efficiency for the latter case.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
MIT Energy Initiative
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Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/j.energy.2009.05.015
