Study of Heat Transfer in the Poly Ethylene Fluidized Bed Reactor Numerically and Experimentally
In this research, heat transfer of a poly Ethylene
fluidized bed reactor without reaction were studied experimentally
and computationally at different superficial gas velocities. A multifluid
Eulerian computational model incorporating the kinetic theory
for solid particles was developed and used to simulate the heat
conducting gas–solid flows in a fluidized bed configuration.
Momentum exchange coefficients were evaluated using the Syamlal–
O-Brien drag functions. Temperature distributions of different phases
in the reactor were also computed. Good agreement was found
between the model predictions and the experimentally obtained data
for the bed expansion ratio as well as the qualitative gas–solid flow
patterns. The simulation and experimental results showed that the gas
temperature decreases as it moves upward in the reactor, while the
solid particle temperature increases. Pressure drop and temperature
distribution predicted by the simulations were in good agreement
with the experimental measurements at superficial gas velocities
higher than the minimum fluidization velocity. Also, the predicted
time-average local voidage profiles were in reasonable agreement
with the experimental results. The study showed that the
computational model was capable of predicting the heat transfer and
the hydrodynamic behavior of gas-solid fluidized bed flows with
reasonable accuracy.
[1] Gidaspow, D., Multiphase Flow and Fluidization, First ed. Academic
press, London, 1994.
[2] Kunii, D., Levenspiel ,O., Fluidization Engineering, Second ed.
Butterworth-Heinemann, Boston, 1991.
[3] Ranade, V.V., Computational Flow Modeling for Chemical Reactor
Engineering, First ed, New York, 2002.
[4] Grace, J.R., Taghipour, F., Verification and validation of CFD models
and dynamic similarity for fluidized beds. Powder Technology , 139,
99-110, 2004.
[5] Bird, R.B., Stewart, W.E., Lightfoot, E.N., Transport Phenomena.
seconded . Wiley, New York, 2002.
[6] Taghipour, F., Ellis, N., Wong, C., Experimental and computational
study of gas-solid fluidized bed hydrodynamics, Chemical Engineering
Science, 60, 6857-6867, 2005.
[7] Kaneko Y., Shiojima, T., Horio, M., DEM simulation of fluidized beds
for gas-phase olefin polymerization, Chemical Engineering Science, 54,
5809-5821, 1999.
[8] Rong. F., Marchisio. D.L., Fox. R.O., CFD Simulation of Polydisperse
Fluidized-Bed Polymerization Reactors, Department of Chemical
Engineering, Iowa State University, 2114 Sweeney Hall, Ames, IA
50010-2230, USA, Preprint submitted to Elsevier Science, August 2003.
[9] Gobin, H. Neau, O. Simonin, J. Llinas, V. Reiling, J.L. Selo, Fluid
dynamic numerical simulation of a gas phase polymerization reactor,
International Journal for Numerical Methods in Fluids, 43,1199-1220,
2003.
[10] Van Wachem, B.G.M., Schouten, J.C., Van den Bleek, C.M., Krishna,
R., Sinclair, J.L., Comparative analysis of CFD models of dense gas-
solid systems, AIChE Journal, 47, 1035-1051, 2001.
[11] Van Wachem, B.G.M., Schouten, J.C., Van den Bleek, C.M., Krishna,
R., Sinclair, J.L., CFD modeling of gas-fluidized beds with a bimodal
particle mixture, AIChE Journal, 47, 1292-1302, 2001.
[12] Chiesa, M., Mathiesen, V., Melheim, J.A.., Halvorsen, B., Numerical
simulation of particulate flow by the Eulerian-Lagrangian and the
Eulerian-Eulerian approach with application to a fluidized bed,
Computers & Chemical Engineering, 29, 291-304, 2005.
[13] Syamlal, M., O-Brien, T.J., Computer simulation of bubbles in a
fluidized bed. A.I.Ch.E., 85, 22-31,1989.
[14] Syamlal, M., O-Brien, T.J., Fluid dynamic simulation of O3
decomposition in a bubbling fluidized bed. A.I.Ch.E. Journal 49, 2793-
2801, 2003
[15] Huilin, L., Yurong, H., Gidaspow, D., Hydrodynamic modeling of
binary mixture in a gas bubbling fluidized bed using the kinetic theory
of granular flow, Chemical Engineering Science, 58, 1197-1205, 2003.
[16] Lun, C.K.K., and Savage, S.B., A Simple Kinetic Theory for Granular
Flow of Rough, Inelastic, Spherical Particles, J. Appl. Mech., 54, 47-53,
1987.
[17] Zhong.W, Zhang.M, Jin.B, Zhang.Y, Xiao.R, Huang.Y, Experimental
investigation of particle mixing behavior in a large spout-fluid bed,
Chemical Engineering and Processing, 2007.
[18] Patankar, S.V., Numerical heat transfer and fluid flow, First ed.
Hemisphere Publishing, Washington, DC, 1980.
[19] Gidaspow, D., Hydrodynamics of Fluidization and Heat Transfer:
Supercomputer Modeling, Appl. Mech. Rev., 39, 1986.
[20] Hamzehei, M., Rahimzadeh, H., Experimental and Numerical Study of
Hydrodynamics with Heat Transfer in a Gas-Solid Fluidized bed Reactor
at Different Particle Sizes, Ind. Eng. Chem. Res., 48, 3177-3186, 2009.
[21] Hamzehei, M., Rahimzadeh, H., Ahmadi, G., Computational and
Experimental Study of Heat Transfer and Hydrodynamics in a 2D Gas-
Solid Fluidized Bed Reactor, Ind. Eng. Chem. Res., (Special Issue) 49,
pp. 5110-5121, 2010.
[22] Hamzehei, M., Rahimzadeh, H., Ahmadi, G., Studies of gas velocity and
particles size effects on fluidized bed hydrodynamics with CFD
modeling and experimental investigation, Journal of Mechanics, 26, pp.
113-124, 2010.
[23] Hamzehei, M. and Rahimzadeh, H., "Investigation of a Fluidized Bed
Chamber Hydrodynamics with Heat Transfer Numerically and
Experimentally," Korean Journal of Chemical Engineering, 27, pp.
355.363, 2010.
[1] Gidaspow, D., Multiphase Flow and Fluidization, First ed. Academic
press, London, 1994.
[2] Kunii, D., Levenspiel ,O., Fluidization Engineering, Second ed.
Butterworth-Heinemann, Boston, 1991.
[3] Ranade, V.V., Computational Flow Modeling for Chemical Reactor
Engineering, First ed, New York, 2002.
[4] Grace, J.R., Taghipour, F., Verification and validation of CFD models
and dynamic similarity for fluidized beds. Powder Technology , 139,
99-110, 2004.
[5] Bird, R.B., Stewart, W.E., Lightfoot, E.N., Transport Phenomena.
seconded . Wiley, New York, 2002.
[6] Taghipour, F., Ellis, N., Wong, C., Experimental and computational
study of gas-solid fluidized bed hydrodynamics, Chemical Engineering
Science, 60, 6857-6867, 2005.
[7] Kaneko Y., Shiojima, T., Horio, M., DEM simulation of fluidized beds
for gas-phase olefin polymerization, Chemical Engineering Science, 54,
5809-5821, 1999.
[8] Rong. F., Marchisio. D.L., Fox. R.O., CFD Simulation of Polydisperse
Fluidized-Bed Polymerization Reactors, Department of Chemical
Engineering, Iowa State University, 2114 Sweeney Hall, Ames, IA
50010-2230, USA, Preprint submitted to Elsevier Science, August 2003.
[9] Gobin, H. Neau, O. Simonin, J. Llinas, V. Reiling, J.L. Selo, Fluid
dynamic numerical simulation of a gas phase polymerization reactor,
International Journal for Numerical Methods in Fluids, 43,1199-1220,
2003.
[10] Van Wachem, B.G.M., Schouten, J.C., Van den Bleek, C.M., Krishna,
R., Sinclair, J.L., Comparative analysis of CFD models of dense gas-
solid systems, AIChE Journal, 47, 1035-1051, 2001.
[11] Van Wachem, B.G.M., Schouten, J.C., Van den Bleek, C.M., Krishna,
R., Sinclair, J.L., CFD modeling of gas-fluidized beds with a bimodal
particle mixture, AIChE Journal, 47, 1292-1302, 2001.
[12] Chiesa, M., Mathiesen, V., Melheim, J.A.., Halvorsen, B., Numerical
simulation of particulate flow by the Eulerian-Lagrangian and the
Eulerian-Eulerian approach with application to a fluidized bed,
Computers & Chemical Engineering, 29, 291-304, 2005.
[13] Syamlal, M., O-Brien, T.J., Computer simulation of bubbles in a
fluidized bed. A.I.Ch.E., 85, 22-31,1989.
[14] Syamlal, M., O-Brien, T.J., Fluid dynamic simulation of O3
decomposition in a bubbling fluidized bed. A.I.Ch.E. Journal 49, 2793-
2801, 2003
[15] Huilin, L., Yurong, H., Gidaspow, D., Hydrodynamic modeling of
binary mixture in a gas bubbling fluidized bed using the kinetic theory
of granular flow, Chemical Engineering Science, 58, 1197-1205, 2003.
[16] Lun, C.K.K., and Savage, S.B., A Simple Kinetic Theory for Granular
Flow of Rough, Inelastic, Spherical Particles, J. Appl. Mech., 54, 47-53,
1987.
[17] Zhong.W, Zhang.M, Jin.B, Zhang.Y, Xiao.R, Huang.Y, Experimental
investigation of particle mixing behavior in a large spout-fluid bed,
Chemical Engineering and Processing, 2007.
[18] Patankar, S.V., Numerical heat transfer and fluid flow, First ed.
Hemisphere Publishing, Washington, DC, 1980.
[19] Gidaspow, D., Hydrodynamics of Fluidization and Heat Transfer:
Supercomputer Modeling, Appl. Mech. Rev., 39, 1986.
[20] Hamzehei, M., Rahimzadeh, H., Experimental and Numerical Study of
Hydrodynamics with Heat Transfer in a Gas-Solid Fluidized bed Reactor
at Different Particle Sizes, Ind. Eng. Chem. Res., 48, 3177-3186, 2009.
[21] Hamzehei, M., Rahimzadeh, H., Ahmadi, G., Computational and
Experimental Study of Heat Transfer and Hydrodynamics in a 2D Gas-
Solid Fluidized Bed Reactor, Ind. Eng. Chem. Res., (Special Issue) 49,
pp. 5110-5121, 2010.
[22] Hamzehei, M., Rahimzadeh, H., Ahmadi, G., Studies of gas velocity and
particles size effects on fluidized bed hydrodynamics with CFD
modeling and experimental investigation, Journal of Mechanics, 26, pp.
113-124, 2010.
[23] Hamzehei, M. and Rahimzadeh, H., "Investigation of a Fluidized Bed
Chamber Hydrodynamics with Heat Transfer Numerically and
Experimentally," Korean Journal of Chemical Engineering, 27, pp.
355.363, 2010.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:55742", author = "Mahdi Hamzehei", title = "Study of Heat Transfer in the Poly Ethylene Fluidized Bed Reactor Numerically and Experimentally", abstract = "In this research, heat transfer of a poly Ethylene
fluidized bed reactor without reaction were studied experimentally
and computationally at different superficial gas velocities. A multifluid
Eulerian computational model incorporating the kinetic theory
for solid particles was developed and used to simulate the heat
conducting gas–solid flows in a fluidized bed configuration.
Momentum exchange coefficients were evaluated using the Syamlal–
O-Brien drag functions. Temperature distributions of different phases
in the reactor were also computed. Good agreement was found
between the model predictions and the experimentally obtained data
for the bed expansion ratio as well as the qualitative gas–solid flow
patterns. The simulation and experimental results showed that the gas
temperature decreases as it moves upward in the reactor, while the
solid particle temperature increases. Pressure drop and temperature
distribution predicted by the simulations were in good agreement
with the experimental measurements at superficial gas velocities
higher than the minimum fluidization velocity. Also, the predicted
time-average local voidage profiles were in reasonable agreement
with the experimental results. The study showed that the
computational model was capable of predicting the heat transfer and
the hydrodynamic behavior of gas-solid fluidized bed flows with
reasonable accuracy.", keywords = "Gas-solid flows, fluidized bed, Hydrodynamics,Heat transfer, Turbulence model, CFD", volume = "5", number = "6", pages = "1031-9", }