An investigation of the heat transfer behavior of longitudinal finned membrane water wall tubes in circulating fluidized bed boilers

2009 ◽  
Vol 193 (2) ◽  
pp. 187-194 ◽  
Author(s):  
Anusorn Chinsuwan ◽  
Animesh Dutta
Keyword(s):  
Heat Transfer ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Water Wall ◽  
Heat Transfer Behavior ◽  
Transfer Behavior ◽  
Fluidized Bed Boilers

scholarly journals Effect of flue gas recirculation on heat transfer in a supercritical circulating fluidized bed combustor

2015 ◽  
Vol 36 (3) ◽  
pp. 61-83 ◽  
Author(s):  
Artur Błaszczuk
Keyword(s):  
Heat Transfer ◽  
Fluidized Bed ◽  
Flue Gas ◽  
Circulating Fluidized Bed ◽  
Furnace Chamber ◽  
Flue Gas Recirculation ◽  
Heat Transfer Behavior ◽  
Transfer Behavior ◽  
Bed Material ◽  
Gas Recirculation

Abstract This paper focuses on assessment of the effect of flue gas recirculation (FGR) on heat transfer behavior in 1296t/h supercritical coal-fired circulating fluidized bed (CFB) combustor. The performance test in supercritical CFB combustor with capacity 966 MWth was performed with the low level of flue gas recirculation rate 6.9% into furnace chamber, for 80% unit load at the bed pressure of 7.7 kPa and the ratio of secondary air to the primary air SA/PA = 0.33. Heat transfer behavior in a supercritical CFB furnace between the active heat transfer surfaces (membrane wall and superheater) and bed material has been analyzed for Geldart B particle with Sauter mean diameters of 0.219 and 0.246 mm. Bed material used in the heat transfer experiments had particle density of 2700 kg/m3. A mechanistic heat transfer model based on cluster renewal approach was used in this work. A heat transfer analysis of CFB combustion system with detailed consideration of bed-to-wall heat transfer coefficient distributions along furnace height is investigated. Heat transfer data for FGR test were compared with the data obtained for representative conditions without recycled flue gases back to the furnace through star-up burners.

Heat-Transfer Model of the Rotary Ash Cooler Used in Circulating Fluidized-Bed Boilers

2010 ◽  
Vol 24 (4) ◽  
pp. 2570-2575 ◽  
Author(s):  
Wei Wang ◽  
Xiaodong Si ◽  
Hairui Yang ◽  
Hai Zhang ◽  
Junfu Lu
Keyword(s):  
Heat Transfer ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Fluidized Bed Boilers
Sign in / Sign up

Export Citation Format

Share Document