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Characteristic features of heat transfer in circulating fluidized bed boilers

Bo Leckner (Institutionen för energiomvandling) ; Bengt-Åke Andersson (Institutionen för energiomvandling)
Powder Technology (0032-5910). Vol. 70 (1992), 3, p. 303-314.
[Artikel, refereegranskad vetenskaplig]

The characteristic features of heat transfer in circulating fluidized bed boilers are described. First, the conditions for heat transfer are listed. Then, examples of measurements from the research boiler at Chalmers University of Technology are presented, including thermal and fluid-dynamic boundary layers as well as heat transfer coefficients measured with a heat flow meter and with thermocouples mounted on the tube walls of the boiler. Differences in heat transfer efficiency of the fins and of the tubes of a membrane tube wall are shown. Finally, heat transfer mechanisms are briefly discussed, and the influence of the macroscopic flow pattern caused by exit, secondary air, etc. is indicated.

Nyckelord: Circulating fluidized beds; Heal transfer; Boiler



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Denna post skapades 2016-06-23. Senast ändrad 2016-08-15.
CPL Pubid: 238153

 

Institutioner (Chalmers)

Institutionen för energiomvandling (1900-2003)

Ämnesområden

Energi
Termisk energiteknik

Chalmers infrastruktur

Chalmers Kraftcentral (CK)