Estimates of turbulence effects in CFB boilers
Paper i proceeding, 1996

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.

Turbulence

Fluid dynamics

Fluidized bed boiler

Författare

Gennadij Palchonok

Filip Johnsson

Institutionen för energiomvandling

Bo G Leckner

Institutionen för energiomvandling

Proc of the 5th International Conference on Circulating Fluidized Bed

Vol. 5 440-445

Ämneskategorier

Energiteknik

Styrkeområden

Energi

Infrastruktur

Chalmers kraftcentral