Impact of Deposit Aging and Surface Roughness on Thermal Fouling: Distributed Model

被引：38
作者：
Coletti, F. [1 ]
Ishiyama, E. M. [2 ]
Paterson, W. R. [2 ]
Wilson, D. I. [2 ]
Macchietto, S. [1 ]
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn & Chem Technol, London SW7 2AZ, England
[2] Univ Cambridge, Dept Chem Engn & Biotechnol, Cambridge CB2 3RA, England
来源：
AICHE JOURNAL | 2010年 / 56卷 / 12期
基金：
英国工程与自然科学研究理事会;
关键词：
aging; crude oil; fouling; mathematical model; roughness; MASS-TRANSFER; HEAT; FLOW;
D O I：
10.1002/aic.12221
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A kinetic model was recently proposed to describe the effect of aging on deposit thermal conductivity and the thermal performance of a shell-and-tube heat exchanger undergoing crude oil fouling. The model is adapted for implementation within a dynamic, distributed system with spatial and temporal distributions, relaxing several of the previous assumptions. The evolution of surface roughness is also considered, using conjectural linear and asymptotic functions. Simulations are performed for a single tube representative of a refinery exchanger. The results demonstrate the substantial effects over time of aging and roughness on heat transfer and pressure drop. Roughness effects yield apparently negative initial fouling resistances, as reported in some experimental tests. The importance of accounting for roughness dynamics in short time scale pilot plant scale tests and aging over longer time scales in industrial applications is highlighted. (C) 2010 American Institute of Chemical Engineers AIChE J, 56: 3257-3273, 2010
引用
收藏
页码：3257 / 3273
页数：17
相关论文
共 37 条
  • [1] ALBERT F, 2009, EUROTHERM HEAT EXCH
  • [2] Asomaning S, 2000, HEAT TRANSFER ENG, V21, P17
  • [3] Bott T.R., 1996, FUEL EN ABSTR, V37, P211, DOI [10.1016/0140-6701(96)88959-4, DOI 10.1016/0140-6701(96)88959-4]
  • [4] Bott TR., 1990, FOULING NOTEBOOK
  • [5] Brown G.G., 1950, Unit Operations
  • [6] Coletti F., 2008, SUST EN UK M SCI ENG
  • [7] COLETTI F, 2009, DYNAMIC DISTRI UNPUB
  • [8] NEGATIVE FOULING RESISTANCES - THE EFFECT OF SURFACE-ROUGHNESS
    CRITTENDEN, BD
    ALDERMAN, NJ
    [J]. CHEMICAL ENGINEERING SCIENCE, 1988, 43 (04) : 829 - 838
  • [9] CRITTENDEN BD, 1979, ENERGY IND, V257
  • [10] Ebert W., 1995, Fouling Mitig. Ind. Heat. Exch., P451
1234