Numerical simulation of radiation intensity of oxy-coal combustion with flue gas recirculation
2013 (English)In: International Journal of Greenhouse Gas Control, ISSN 1750-5836, Vol. 17, 473-480 p.Article in journal (Refereed) Published
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.
Absorption coefficient, Carbon capture, Flue gas recycle ratio, Oxy-coal combustion, Radiation intensity
IdentifiersURN: urn:nbn:se:kth:diva-126063DOI: 10.1016/j.ijggc.2013.05.002ISI: 000324153700043ScopusID: 2-s2.0-84880693104OAI: oai:DiVA.org:kth-126063DiVA: diva2:641658
QC 201308192013-08-192013-08-192013-10-11Bibliographically approved