Empirical model for predicting cross-sectional averaged suspension density in commercial circulating fluidised bed boilers

Chinsuwan, Anusorn; Dutta, Animesh

doi:10.1179/174602208x305192

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…Recently, Chinsuwan and Dutta (2008) proposed an empirical correlation for predicting the cross‐sectional average suspension density in commercial CFB boilers as: where ρ and ρ s are cross‐sectional average suspension density and solid density, respectively. Fr t is the Froude number, Fr t = ( U − U t ) 2 / gH , which is a dimensionless parameter representing the ratio of kinetic energy to potential energy of solid particles at the riser exit.…”

Section: Theoretical Approachmentioning

confidence: 99%

Investigation of the temperature distribution and material limits of membrane water wall tubes of circulating fluidized bed boilers

Chinsuwan

Dutta

2010

Can J Chem Eng

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Assuming steady state, constant bed temperature and constant tube thermal conductivity, the three-dimensional heat conduction equations were numerically solved. It was found that the temperature distribution can be expressed as dimensionless temperature in terms of Froude number, particle to furnace diameter ratio, and local to total furnace height ratio. The models for predicting the dimensionless wall temperature distribution and dimensionless mean wall temperature were also developed in this work. Finally, the limits of common tube materials used as water wall tubes based on maximum allowable stress and oxidation criteria were also investigated.En supposant l'état d'équilibre, une température constante de lit et une conductivité thermique constante de tube, les troiséquations de conduction de la chaleur ontété numériquement résolues pour des chaudièresà lit fluidisé circulant. On a trouvé que la distribution de température peut etre exprimée sous forme de température adimensionnelle en termes de nombre de Froude, du rapport diamètre des particules-diamètre de la chaudière et du rapport hauteur locale-hauteur totale de la chaudière. Les modèles de prédiction de la distribution de la température de paroi adimensionnelle et de la température de paroi moyenne adimensionnelle ontétéégalement développés dans ce travail. Finalement, on a aussí etudié les limites des matériaux courants des tubes utilisés comme tubes de paroi, en se basant sur les contraintes maximales permises et les critères d'oxydation.

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