LES (large eddy simulation) is applied to combustion simulations of two large scale pulverized coal-fired furnaces. One application is a boiler furnace with the coal feed rate of 3,000 kg/h. The results of LES show good agreement in not only distributions of temperature, NO concentration, and CO concentration on the vertical center line but also NO and CO emissions and UBC (unburned carbon in ash). The calculation error of NO emission is 10%. The other application is a horizontal furnace with a low NOx burner with the coal feed rate of 560 kg/h. LES predicts temperatures and oxygen concentrations accurately; but the standard k-ε model does not. The flame width calculated by the standard k-ε model is narrower than that by LES. These calculated results indicate that the drawback of the standard k-ε model is its low calculation accuracy for the coal jet flame decay and lift-off height.
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ASME 2011 Power Conference collocated with JSME ICOPE 2011
July 12–14, 2011
Denver, Colorado, USA
Conference Sponsors:
- Power Division
ISBN:
978-0-7918-4459-5
PROCEEDINGS PAPER
LES of Pulverized Coal Combustion Furnaces Available to Purchase
Kenji Yamamoto,
Kenji Yamamoto
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
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Daisuke Kina,
Daisuke Kina
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
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Teruyuki Okazaki,
Teruyuki Okazaki
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
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Masayuki Taniguchi,
Masayuki Taniguchi
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
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Hirofumi Okazaki,
Hirofumi Okazaki
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
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Kenichi Ochi
Kenichi Ochi
Babcock-Hitachi K. K., Hiroshima, Japan
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Kenji Yamamoto
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
Daisuke Kina
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
Teruyuki Okazaki
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
Masayuki Taniguchi
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
Hirofumi Okazaki
Hitachi, Ltd., Hitachinaka, Ibaraki, Japan
Kenichi Ochi
Babcock-Hitachi K. K., Hiroshima, Japan
Paper No:
POWER2011-55367, pp. 131-139; 9 pages
Published Online:
February 28, 2012
Citation
Yamamoto, K, Kina, D, Okazaki, T, Taniguchi, M, Okazaki, H, & Ochi, K. "LES of Pulverized Coal Combustion Furnaces." Proceedings of the ASME 2011 Power Conference collocated with JSME ICOPE 2011. ASME 2011 Power Conference, Volume 1. Denver, Colorado, USA. July 12–14, 2011. pp. 131-139. ASME. https://doi.org/10.1115/POWER2011-55367
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