Applied Thermal Engineering, Volume 39, June 2012, Pages
157–162
Modeling the thermo-hydraulic performance of
direct fired heaters for crude processing
A. Morales-Fuentesa,
arturo.moralesfn@uanl.edu.mx
G.T. Polleyb,
M. Picón-Núñezb,
S. Martínez-Martíneza
a School of Mechanical and Electrical Engineering, Autonomous
University of Nuevo León, México
b Department of Chemical Engineering, University of Guanajuato,
México
Abstract
Fouling in heat exchangers
for crude processing is a problem which remains unsolved. Fouling models due to
coke deposition on the heat transfer surface have been devloped with a high
degree of accuracy for single phase situations. Fouling rates in systems where
two phase flow takes place, as in fired heaters, need much more study.
Authors adapt a fouling
rate model to the case of two phase flow conditions. The model is used to predict the
thermo-hydraulic behavior of fired heaters. It predicts how fuel consumption is increased
as the thermal resistance builds up on the heat transfer surface.
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