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Effects of Drag Models on the Hydrodynamics and Heat Transfer in a Conical Fluidized Bed Combustor
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 Title & Authors
Effects of Drag Models on the Hydrodynamics and Heat Transfer in a Conical Fluidized Bed Combustor
Kang, Seung Mo; Abdelmotalib, Hamada; Ko, Dong Guk; Park, Woe-Chul; Im, Ik-Tae;
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In this study, wall to bed heat transfer and hydrodynamic characteristics in a conical fluidized bed combustor was investigated using computational fluid dynamics method. A two-fluid Eulerian-Eulerian model was used with applying the kinetic theory for granular flow(KTGF). The effects of the two drag models, Gidaspow and the Syamlal-O'Brien model, different inlet velocities() and different particle sizes on the hydrodynamics and heat transfer were studied. The results showed that the hydrodynamic characteristics such as bed expansion ratio and pressure drop were not affected significantly by the drag models. But the heat transfer coefficient was different for the two drag models, especially at lower gas inlet velocities and small particle sizes.
Computational Fluid Dynamics;Fluidized Bed Combustor;Heat Transfer Coefficient;Drag Model;
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Kendry, M. P., 2008, "Energy Production from Biomass (part 2), Conversion Technologies," Bioresource Technology Vol. 83, pp. 47-54.

Wang, L., Weller, L. C., Jones, D. D. and Hanna, A. M., 2008, "Contemporary Issues in Thermal Gasification of Biomass and Its Application to Electricity and Fuel Production," Biomass and Bioenergy, Vol. 32, pp. 573-581. crossref(new window)

Kaewklum, R., Kuprianov, V. I. and Douglas L. P., 2009, "Hydrodynamics of Air-Sand Flow in a Conical Swirling Fluidized Bed: A Comparative Study Between Tangential and Axial Air Entries," Energy Conversion and Management, Vol. 50, pp. 2999-3006. crossref(new window)

Patil, R. S. and Pandey, P. M., 2011, "Parametric Studies and Effect of Scale-Up on Wall to Bed Heat Transfer Characteristics of Circulating Fluidized Bed Risers," Experimental Thermal and Fluid Science, Vol. 35, pp. 485-494. crossref(new window)

Gupta, A. V. and Nag, P. K., 2002, "Bed to Wall Heat Transfer Behavior in a Pressurized Circulating Fluidized Bed," International Journal of Heat and Mass Transfer, Vol. 45, pp. 3429-3436. crossref(new window)

Kalita, P., Mahant, P. and Saha, K. U., 2013, "Some Studies on Wall to Bed Heat Transfer in a Pressurized Circulating Fluidized Bed Unit," Procedia Engineering, Vol. 56, pp. 16-172.

Armstrong, L. M., Gu, S. and Luo, K. H., 2010, "Study of Wall to Bed Heat Transfer in a Bubbling Fluidized Bed Using the Kinetic Theory of Granular Flow," International Journal of Heat and Mass Transfer, Vol. 53, pp. 4949-4959. crossref(new window)

Kuipers, J. A. M., Prins, W. and Swaaij, W. P., 1997, "Numerical, Calculation of Wall to Bed Heat-Transfer Coefficients in Gas Fluidized Beds," AIChE Journal, Vol. 38, pp. 1079-1091.

Yusuf, R., Melaaen, M. C. and Mathiesen, V., 2005, "Convective Heat and Mass Transfer Modeling in Gas Fluidized Beds," Chemical Engineering Technology, Vol. 28, pp. 13-24. crossref(new window)

Yusuf, R., Halvorsen, B. and Melaaen, C. M., 2012, "An Experimental and Computational Study of Wall to Bed Heat Transfer in a Bubbling Gas-Solid Fluidized Bed," International Journal of Multiphase Flow, Vol. 42, pp. 9-23. crossref(new window)

Hou, Q. F., Zhou, Z. Y. and Yu, A. B., 2009, "Computational Study of Heat Transfer in Bubbling Fluidized Beds with Geldert a Powder," Seventh International Conference on CFD in the Minerals and Process Industries, Australia 9-11.

Almuttahar, A. and Taghipour, F., 2008, "Computational Fluid Dynamics of a Circulating Fluidized Bed Under Various Fluidization Conditions," Chemical Engineering Science, Vol. 63, pp. 1696-1709. crossref(new window)

Kaewklum, R. and Kuprianov, V. I., 2008, "Theoretical and Experimental Study on Hydrodynamic Characteristics of Fluidization in Air-Sand Conical Beds," Chemical Engineering Science, Vol. 63, pp.1471-1479. crossref(new window)

Sirisomboon, K., Kuprianov, V. I. and Arromdee, P., 2010, "Effects of Design Features on Combustion Efficiency and Emission Performance of a Biomass-Fuelled Fluidized-Bed Combustor," Chemical Engineering and Processing, Vol. 49, pp. 270-277. crossref(new window)

Wiens, J. and Pugsley, T., 2006, "Tomographic Imaging of a Conical Fluidized Bed of Dry Pharmaceutical Granule," Powder Technology, Vol. 169, pp. 49-59. crossref(new window)

Patankar, S., 1980, "Numerical Heat Transfer and Fluid Flow," Hemisphere, Washington, D.C.

Fluent is a product name by Ansys, Ansys Inc., Southpointe 275 Technology Drive, Canonsburg, PA 15317, USA.

2003, Fluent 6.1 User's Guide Volume 3, Chap. 22, Fluent Inc., Centerra Resource Park, 10 Cavendish Court, Lebanon, NH 03766.

Patil, D. J., Smit, J., Annaland, M. and Kuipers, J. A. M., 2006, "Wall to Bed Heat Transfer in Gas-Solid Bubbling Fluidized Beds," AIChE Journal, Vol. 52, pp. 58-74. crossref(new window)

Lun, C., Savage, S., Jeffrey, D. and Chepurniy, N., 1984, "Kinetic Theories for Granular Flow: Inelastic Particles in Couette Flow and Slightly Inelastic Particles in a General Flow Field," Journal of Fluid Mechanics, Vol.140, pp. 223-256. crossref(new window)

Syamlal, M. and Gidaspow, D., 1985, "Hydrodynamics of Fluidization: Prediction of Wall-To-Bed Heat Transfer Coefficients," AIChE Journal, Vol. 31, pp. 127-135. crossref(new window)

Gunn, D. J., 1978, "Transfer of Heat or Mass to Particles in Fixed and Fluidized Beds," International Journal of Heat and Mass Transfer, Vol. 21, pp. 467-476. crossref(new window)

Singh, R. K., Suryanarayana, A. and Roy, G. K., 1999, "Prediction of Bed Expansion Ratio for Gas-Solid Fluidization in Cylindrical and Non-Cylindrical Beds," Chemical Engineering Journal, Vol. 79, pp. 51-55.

Im, I.-T., Abdelmotalib, H. M., Kim, M. S., Park, C. W., "A Study on Wall to Bed Heat Transfer in a Conical Fluidized Bed Combustor," ICHMT International Symposium on Advances in Computational Heat Transfer, May 25-29, 2015, Rutgers University, New Brunswick, NJ, USA, Book of Abstracts, Edited by Jaluria, Y. and Guo, Z., p. 295.