The influence of multiple tubes on the tube-to-bed heat transfer in a fluidised bed


Armstrong, L.M., Gu, S. and Luo, K.H. (2010) The influence of multiple tubes on the tube-to-bed heat transfer in a fluidised bed. International Journal of Multiphase Flow, 36, (11-12), 916-929. (doi:10.1016/j.ijmultiphaseflow.2010.07.004 ).

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Description/Abstract

There have been few studies modelling both flow and heat transfer in fluidised beds. The kinetic theory of granular flow (KTGF) has been used for flow prediction in the past without heat transfer modelling. In the present study, a two-fluid Eulerian-Eulerian formulation incorporating the KTGF was applied first to a tube-to-bed reactor with one immersed tube and compared with the results in the literature. The bed was then modified to introduce two and three heated tubes. The effects on the flow and temperature distribution, local heat transfer coefficients and averaged heat transfer coefficients over a 3.0s time period were carried out. Results showed that increasing the number of tubes promotes heat transfer from tubes to the particles and flow. The heat transfer coefficients extracted from the single-tube to three-tube cases were analyzed in detail, confirming the importance of linking flow/particle and heat transfer calculations

Item Type: Article
ISSNs: 0301-9322 (print)
1879-3533 (electronic)
Subjects: Q Science > Q Science (General)
T Technology > T Technology (General)
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
ePrint ID: 165821
Date Deposited: 20 Oct 2010 10:14
Last Modified: 28 Mar 2014 15:24
Projects:
Collaborative Research in Energy with South Africa:Scale-up modelling to answer Pyrolysis Challenge
Funded by: EPSRC (EP/G034281/1)
Led by: Sai GU
1 November 2009 to 30 April 2013
URI: http://eprints.soton.ac.uk/id/eprint/165821

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