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Heat Exchanger Fouling and Cleaning VII
July 1-6, 2007 - Tomar, Portugal
| Editors: |
Hans Müller-Steinhagen, Institute of Technical Thermodynamics, German Aerospace Centre (DLR)
and Institute for Thermodynamics and Thermal Engineering, University of Stuttgart, Germany
M. Reza Malayeri, University of Stuttgart, Germany
A. Paul Watkinson, The University of British Columbia, Canada |
The articles for these proceedings are peer-reviewed.
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THE EFFECT OF FOULING ON HEAT TRANSFER, PRESSURE DROP AND THROUGHPUT IN REFINERY PREHEAT TRAINS: OPTIMISATION OF CLEANING SCHEDULES
E. M. Ishiyama, Department of Chemical Engineering, Pembroke Street, Cambridge CB2 3RA, UK
W. R. Paterson, Department of Chemical Engineering, Pembroke Street, Cambridge CB2 3RA, UK
D. I. Wilson, Department of Chemical Engineering, Pembroke Street, Cambridge CB2 3RA, UK
ABSTRACT:
Optimising cleaning schedules for refinery preheat
trains requires a robust and reliable simulator, reliable
fouling models and the ability to handle the thermal and
hydraulic impacts of fouling. The interaction between
thermal and hydraulic effects is explored using
engineering analyses and fouling rate laws based on the
‘threshold fouling’ concept; the potential occurrence of a
new phenomenon, ‘thermo-hydraulic channeling’ in
parallel heat exchangers, is identified. The importance of
the foulant thermal conductivity is highlighted. We also
report the development of a highly flexible preheat train
simulator constructed in MATLAB/Excel. It is able
to accommodate variable throughput, control valve
operation and different cost scenarios. The simulator is
demonstrated on a network of 14 heat exchangers, where
the importance of optimising the flow split between
parallel streams is illustrated.
E. M. Ishiyama, W. R. Paterson, and D. I. Wilson, "THE EFFECT OF FOULING ON HEAT TRANSFER, PRESSURE DROP AND THROUGHPUT IN REFINERY PREHEAT TRAINS: OPTIMISATION OF CLEANING SCHEDULES" in "Heat Exchanger Fouling and Cleaning VII", Hans Müller-Steinhagen, Institute of Technical Thermodynamics, German Aerospace Centre (DLR)
and Institute for Thermodynamics and Thermal Engineering, University of Stuttgart, Germany
M. Reza Malayeri, University of Stuttgart, Germany
A. Paul Watkinson, The University of British Columbia, Canada
Eds, ECI
Symposium Series, Volume RP5 (2007). http://services.bepress.com/eci/heatexchanger2007/9
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