Effects of particle size on bed-to-surface heat transfer in bubbling fluidized bed heat exchangers of 550 MWe ultra-supercritical CFB boiler

Energy ◽  
2021 ◽  
Vol 222 ◽  
pp. 119889
Author(s):  
Dongfang Li ◽  
Kyeongho Kim ◽  
Minwoo Kim ◽  
Yijie Zeng ◽  
Zhongzhi Yang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Particle Size ◽  
Fluidized Bed ◽  
Heat Exchangers ◽  
Surface Heat ◽  
Cfb Boiler ◽  
Surface Heat Transfer ◽  
Bubbling Fluidized Bed

On fluidized bed-to-surface heat transfer

1976 ◽  
Vol 54 (1-2) ◽  
pp. 52-58 ◽  
Author(s):  
S. S. Zabrodsky ◽  
N. V. Antonishin ◽  
A. L. Parnas
Keyword(s):  
Heat Transfer ◽  
Fluidized Bed ◽  
Surface Heat ◽  
Surface Heat Transfer

scholarly journals EXPERIMENTAL STUDY ON BED-TO-TUBE HEAT TRANSFER COEFFICIENTS IN BUBBLING FLUIDIZED BED

2021 ◽  
Vol 15 (2) ◽  
pp. 139-149
Author(s):  
Bamiji Zacheous Adewole
Keyword(s):  
Heat Transfer ◽  
Particle Size ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Fluidized Bed ◽  
Particle Sizes ◽  
Transfer Coefficients ◽  
Heat Transfer Coefficients ◽  
Bubbling Fluidized Bed ◽  
Coconut Shells

The overall bed-to-tube heat transfer coefficients of the blends of Lafia-obi coal and coconut shells have been investigated in a bubbling fluidized bed combustor. Experiments were performed at five different particle sizes of coal (5, 10, 15, 20 and 25 mm) and five different particle sizes of coconut shells (2, 6, 10,14 and 18 mm) for different blend proportions of 10%, 20%, 30%, 40% and 50%. Results obtained showed that the overall bed-to-tube heat transfer coefficient decreased with increasing coconut shell particle size in the blends. Combined effects of high radiation from large particle size of coal (25 mm) and high convection heat from small particle size of coconut shell (2 mm) at blend proportion of 10 and 50% produced the maximum bed-to-tube heat transfer coefficient. Due to the importance of heat exchange in the fluidized bed, it is observed that the contribution of biomass co-firing with coal is significant, hence, co-firing at optimal particle size and biomass blend ratio is imperative for achieving higher bed-to-tube heat transfer in the fluidized bed boiler.

Correlating local tube surface heat transfer with bubble presence in a fluidized bed

1994 ◽  
Vol 79 (1) ◽  
pp. 69-79 ◽  
Author(s):  
David McKain ◽  
Nigel Clark ◽  
Christopher Atkinson ◽  
Richard Turton
Keyword(s):  
Heat Transfer ◽  
Fluidized Bed ◽  
Surface Heat ◽  
Tube Surface ◽  
Surface Heat Transfer

Suspension-to-Surface heat transfer in a circulating-fluidized-bed combustor

AIChE Journal ◽  
1989 ◽  
Vol 35 (10) ◽  
pp. 1685-1691 ◽  
Author(s):  
Richard L. Wu ◽  
John R. Grace ◽  
C. Jim Lim ◽  
Clive M. H. Brereton
Keyword(s):  
Heat Transfer ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Surface Heat ◽  
Surface Heat Transfer ◽  
Fluidized Bed Combustor
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