Modares Mechanical Engineering

Modares Mechanical Engineering

CFD modeling of Asphaltene deposition in turbulent flow inside heat exchanger pipe

Authors
Ashkan Torabi Farsani
Reza Maddahian
Amirhossein Nazari
Mohammad Mahdi Heyhat
Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
Abstract
In this research, the Asphaltene particles deposition is modeled using species transport equations. It is assumed that the deposition phenomenon consists of two steps: transport of Asphaltene particles toward the wall and attachment of them to the wall. Due to the small size of Asphaltene particles, their motion is simulated using species transport equation. Transport of Asphaltene particles is modeled by turbulent and Brownian diffusion and attachment mechanism is modeled employing first order chemical reaction. Effects of surface temperature and velocity is considered in the model. Finally the effects of velocity, surface temperature and Asphaltene concentration is investigated and compared with experimental data. The simulation results are agreed well with experimental data and the maximum error of is about 20 percentage. Also in addition of deposition rate, transport and attachment rate are investigated. The results indicate that Asphaltene attachment is more important than transport of Asphaltene, so accurate modelling of attachment has significant effect on prediction of Asphaltene deposition rate.
Keywords
Numerical simulation
Asphaltene deposition
attachment of particles
Species approach
[1] T. R. Bott, CHAPTER 1 - Introduction, in: Fouling of Heat Exchangers, Eds., pp. 1-6, Amsterdam: Elsevier Science B.V., 1995.
[2] F. Coletti, H. M. Joshi, S. Macchietto, G. F. Hewitt, Chapter One - Introduction, in: F. C. F. Hewitt, Crude Oil Fouling, Eds., pp. 1-22, Boston: Gulf Professional Publishing, 2015.
[3] G. Dickakian, S. Seay, Asphaltene precipitation primary crude exchanger fouling mechanism, Oil Gas J.;(United States), Vol. 86, No. 10, pp. 47-50, 1988.
[4] J. G. Speight, Chapter 6 - Asphaltene Deposition and Fouling, in: Fouling in Refineries, Eds., pp. 129-154, Boston: Gulf Professional Publishing, 2015.
[5] B. Yeap, D. Wilson, G. Polley, S. Pugh, Mitigation of crude oil refinery heat exchanger fouling through retrofits based on thermo-hydraulic fouling models, Chemical Engineering Research and Design, Vol. 82, No. 1, pp. 53- 71, 2004.
[6] I. A. Wiehe, Asphaltene solubility and fluid compatibility, Energy & Fuels, Vol. 26, No. 7, pp. 4004-4016, 2012.
[7] N. Epstein, Elements of particle deposition onto nonporous solid surfaces parallel to suspension flows, Experimental Thermal and Fluid Science, Vol. 14, No. 4, pp. 323-334, 1997.
[8] M. Soltani, G. Ahmadi, On particle adhesion and removal mechanisms in turbulent flows, Journal of Adhesion Science and Technology, Vol. 8, No. 7, pp. 763-785, 1994.
[9] N. Epstein, Thinking about Heat Transfer Fouling: A 5 × 5 Matrix, Heat Transfer Engineering, Vol. 4, No. 1, pp. 43-56, 1983.
[10] U. Ojaniemi, Modelling particulate fouling in heat exchanger with high solid content liquid suspension, PhD Thesis, University of Aalto, Espoo, 2015.
[11] W. Ebert, C. B. Panchal, Analysis of Exxon crude-oil-slip stream coking data, Proceedings of Fouling mitigation of industrial heat exchangers, San Luis Ebispo: Argonne National Lab, pp. 18-23, 1995.
[12] M. R. J. Nasr, M. M. Givi, Modeling of crude oil fouling in preheat exchangers of refinery distillation units, Applied thermal engineering, Vol. 26, No. 14, pp. 1572-1577, 2006.
[13] C. Panchal, W. Kuru, C. Liao, W. Ebert, J. Palen, Threshold conditions for crude oil fouling, Proceedings of Understanding heat exchanger fouling and its mitigation, Newyork: Begell House, pp. 273-281, 1999.
[14] G. T. Polley, D. Wilson, B. Yeap, S. Pugh, Evaluation of laboratory crude oil threshold fouling data for application to refinery pre-heat trains, Applied Thermal Engineering, Vol. 22, No. 7, pp. 777-788, 2002.
[15] Y. Wang, Z. Yuan, Y. Liang, Y. Xie, X. Chen, X. Li, A review of experimental measurement and prediction models of crude oil fouling rate in crude refinery preheat trains, Asia Pacific Journal of Chemical Engineering, Vol. 10, No. 4, pp. 607-625, 2015.
[16] M. Jamialahmadi, B. Soltani, H. Müller-Steinhagen, D. Rashtchian, Measurement and prediction of the rate of deposition of flocculated asphaltene particles from oil, International Journal of Heat and Mass Transfer, Vol. 52, No. 19, pp. 4624-4634, 2009.
[17] F. Coletti, B. D. Crittenden, A. J. Haslam, G. F. Hewitt, G. Jackson, G. Jimenez-Serratos, S. Macchietto, O. K. Matar, E. A. Müller, D. Sileri, J. Yang, Chapter Five - Modeling of Fouling from Molecular to Plant Scale, in: F. C. F. Hewitt, Crude Oil Fouling, Eds., pp. 179-320, Boston: Gulf Professional Publishing, 2015.
[18] F. Salimi, S. Ayatollahi, M. Vafaie Seftie, An Experimental Investigation and Prediction of Asphaltene Deposition during Laminar Flow in the Pipes Using a Heat Transfer Approach, Iranian Journal of Oil & Gas Science and Technology, Vol. 6, No. 2, pp. 17-32, 2017.
[19] F. M. Vargas, J. L. Creek, W. G. Chapman, On the development of an asphaltene deposition simulator, Energy & Fuels, Vol. 24, No. 4, pp. 2294- 2299, 2010.
[20] A. S. Kurup, F. M. Vargas, J. Wang, J. Buckley, J. L. Creek, H. Subramani, J, W. G. Chapman, Development and application of an asphaltene deposition tool (ADEPT) for well bores, Energy & Fuels, Vol. 25, No. 10, pp. 4506- 4516, 2011.
[21] A. S. Kurup, J. Wang, H. J. Subramani, J. Buckley, J. L. Creek, W. G. Chapman, Revisiting asphaltene deposition tool (ADEPT): field application, Energy & Fuels, Vol. 26, No. 9, pp. 5702-5710, 2012.
[22] M. Bayat, J. Aminian, M. Bazmi, S. Shahhosseini, K. Sharifi, CFD modeling of fouling in crude oil pre-heaters, Energy Conversion and Management, Vol. 64, pp. 344-350, 2012.
[23] M. Haghshenasfard, K. Hooman, CFD modeling of asphaltene deposition rate from crude oil, Journal of Petroleum Science and Engineering, Vol. 128, pp. 24-32, 2015.
[24] A. Bejan, Turbulent Boundary Layer Flow, in: Convection Heat Transfer, Eds., pp. 320-368: John Wiley & Sons, Inc., 2013.
[25] F. R. Menter, Two-equation eddy-viscosity turbulence models for engineering applications, AIAA journal, Vol. 32, No. 8, pp. 1598-1605, 1994.
[26] W. M. Kays, Turbulent Prandtl number—where are we?, Journal of Heat Transfer, Vol. 116, No. 2, pp. 284-295, 1994.
[27] C. A. Bennett, R. S. Kistler, K. Nangia, W. Al-Ghawas, N. Al-Hajji, A. AlJemaz, Observation of an isokinetic temperature and compensation effect for high-temperature crude oil fouling, Heat Transfer Engineering, Vol. 30, No. 10-11, pp. 794-804, 2009.
[28] A. Guha, Transport and deposition of particles in turbulent and laminar flow, Annual Review of Fluid Mechanics, Vol. 40, pp. 311-341, 2008.
[29] A. Bejan, Mass Transfer, in: Convection Heat Transfer, Eds., pp. 489-536: John Wiley & Sons, Inc., 2013.
[30] F. Coletti, B. D. Crittenden, S. Macchietto, Chapter Two - Basic Science of the Fouling Process, in: F. C. F. Hewitt, Crude Oil Fouling, Eds., pp. 23-50, Boston: Gulf Professional Publishing, 2015.
[31] E. Ruckenstein, D. C. Prieve, Rate of deposition of Brownian particles under the action of London and double-layer forces, Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics, Vol. 69, pp. 1522-1536, 1973.
[32] N. Epstein, A model of the initial chemical reaction fouling rate for flow within a heated tube and its verification, in Proceeding of 10th International Heat Transfer Conference, Brighton: Hemsphere Publishing Corporation, pp. 225-229, 1994.
[33] A. P. Watkinson, Deposition from crude oils in heat exchangers, Heat transfer engineering, Vol. 28, No. 3, pp. 177-184, 2007.
[34] N. Epstein, Particulate fouling of heat transfer surfaces: mechanisms and models, in: Fouling science and technology, Eds., pp. 143-164, Dordrecht: Springer, 1988.
[35] A. Bejan, Turbulent Duct Flow, in: Convection Heat Transfer, Eds., pp. 369-397: John Wiley & Sons, Inc., 2013.
[36] T. Maqbool, S. Raha, M. P. Hoepfner, H. S. Fogler, Modeling the aggregation of asphaltene nanoaggregates in crude oil− precipitant systems, Energy & Fuels, Vol. 25, No. 4, pp. 1585-1596, 2011.
Modares Mechanical Engineering
Volume 18, Issue 3
May 2018
Pages 197-207