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Estimates of turbulence effects in CFB boilers

Gennadij Palchonok ; Filip Johnsson (Institutionen för energiomvandling) ; Bo Leckner (Institutionen för energiomvandling)
Proc of the 5th International Conference on Circulating Fluidized Bed Vol. 5 (1996), p. 440-445.
[Konferensbidrag, refereegranskat]

A simplified physical model of turbulence in a circulating fluidized bed (CFB) combustor is presented. The existence of a dense bubbling bottom bed, a splash zone with pronounced clustering effects and a transport zone with predominantly disperse solids flow in the core is accounted for. The energy dissipation rate evaluated from the total energy supply and the macro-scale of the bubble-induced turbulence are used as defining parameters for order of magnitude estimates of turbulence effects in a 0.7 m wide cold rig and a 12 MW CFB boiler. The results obtained show a reasonable agreement with available experimental data.

Nyckelord: Fluidized bed boiler; Turbulence; Fluid dynamics


The ISBN is given as 7-03-006111-X/TQ Science Press, Beijing, China



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Denna post skapades 2016-06-29. Senast ändrad 2016-08-15.
CPL Pubid: 238582

 

Institutioner (Chalmers)

Institutionen för energiomvandling (1900-2003)

Ämnesområden

Energi
Termisk energiteknik

Chalmers infrastruktur

Chalmers Kraftcentral (CK)