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Numerical simulation of radiation intensity of oxy-coal combustion with flue gas recirculation
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- Hu, YuKun (author)
- KTH,Energiprocesser,Royal Institute of Technology
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- Yan, Jinyue (author)
- Mälardalens högskola,KTH,Energiprocesser,Akademin för ekonomi, samhälle och teknik
- (creator_code:org_t)
- Elsevier BV, 2013
- 2013
- English.
- In: International Journal of Greenhouse Gas Control. - : Elsevier BV. - 1750-5836 .- 1878-0148. ; 17, s. 473-480
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Keyword
- Absorption coefficient
- Carbon capture
- Flue gas recycle ratio
- Oxy-coal combustion
- Radiation intensity
Publication and Content Type
- ref (subject category)
- art (subject category)
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