Characteristic features of heat transfer in circulating fluidized bed boilers
Artikel i vetenskaplig tidskrift, 1992

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.

Circulating fluidized beds

Boiler

Heal transfer

Författare

Bo G Leckner

Institutionen för energiomvandling

Bengt-Åke Andersson

Institutionen för energiomvandling

Powder Technology

0032-5910 (ISSN)

Vol. 70 3 303-314

Ämneskategorier

Energiteknik

Styrkeområden

Energi

Infrastruktur

Chalmers kraftcentral