Thermal Aspects a Circulating Fluidized Bed with Air Staging
2005 (English)In: International journal of energy research, ISSN 0363-907X, Vol. 29, no 10, 923-935 p.Article in journal (Refereed) Published
In this study, effects of air staging on wall-to-bed heat transfer were investigated in a laboratory scale circulating fluidized bed (0.23m ID, 7.6m high). The bed was operated under ambient conditions with silica sand particles (dp=89 mm, rp=2650 kgm_3). Two different designs of secondary air (SA) injectors were used for air staging: radial and tangential. Bed-to-wall heat transfer measurements were carried out at three elevations above the SA injection port. The results indicate that similar to non-SA operation, the heat transfer with air staging depends strongly on the cross-sectional average suspension density. Tangential secondary injection was found to increase the bed-to-wall heat transfer above the SA injection port significantly due to increased suspension density compared with non-SA operation.
Place, publisher, year, edition, pages
John Wiley & Sons, Ltd. , 2005. Vol. 29, no 10, 923-935 p.
circulating fluidized bed; heat transfer; secondary air; air staging
IdentifiersURN: urn:nbn:se:umu:diva-20027DOI: 10.1002/er.1121OAI: oai:DiVA.org:umu-20027DiVA: diva2:207988