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Numerical simulation of radiation intensity of oxy-coal combustion with flue gas recirculation
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Energy Processes.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Energy Processes.
2013 (English)In: International Journal of Greenhouse Gas Control, ISSN 1750-5836, E-ISSN 1878-0148, Vol. 17, 473-480 p.Article in journal (Refereed) Published
Abstract [en]

Oxy-fuel combustion is one of potential technologies for carbon dioxide (CO2) capture in fossil fuel fired power plants. Characterization of flue gas composition in the oxy-fuel combustion differs from that of conventional air-coal combustion, which results in the change of radiative heat transfer in combustion processes. This paper presents a numerical study of radiation intensity on lateral walls based on the experimental results of a 0.5MW combustion test facility (CTF). Differences in the oxy-coal combustion are analyzed, such as flue gas recycle, absorption coefficient and radiation intensity. The simulation results show that an effective O2 concentration ([O2]effective) between 29 and 33vol% (equivalent to the flue gas recycle ratio of 72-69%) constitutes a reasonable range, within this range the behavior of oxy-coal combustion is similar to air-coal combustion. Compared with the air-coal combustion, the lower limit (29vol%) of this range results in a similar radiative heat flux at the region closed to the burner, but a lower radiative heat flux in the downstream region of the CTF; the upper limit (33vol%) of this range results in a higher radiative heat flux at the region closed to the burner, while a similar radiative heat flux in the downstream region of the CTF.

Place, publisher, year, edition, pages
2013. Vol. 17, 473-480 p.
Keyword [en]
Absorption coefficient, Carbon capture, Flue gas recycle ratio, Oxy-coal combustion, Radiation intensity
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-126063DOI: 10.1016/j.ijggc.2013.05.002ISI: 000324153700043Scopus ID: 2-s2.0-84880693104OAI: oai:DiVA.org:kth-126063DiVA: diva2:641658
Note

QC 20130819

Available from: 2013-08-19 Created: 2013-08-19 Last updated: 2017-12-06Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • vancouver
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  • de-DE
  • en-GB
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  • Other locale
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