Modelling of the tubular furnace for the heating crude oil
Abstract
This work shows the results obtained in the study carried out in one of the
Heating Furnaces of the "Hermanos Díaz" Oil Refinery in Santiago de Cuba.
An evaluation of the main variables and disturbances involved in the crude
oil heating process is carried out, and a multivariable mathematical model of
the F-101 furnace is elaborated. Furthermore, the relevance and economic
and environmental impact of obtaining a better dynamic behaviour of the
furnace, which implies a considerable reduction in energy consumption, is
analysed. The objective of obtaining the multivariable mathematical model is
to design future control strategies to increase the energy efficiency of this
technological process, which is considered to be the largest fuel consumer in
the refining process. The results obtained through numerical simulation
allowed us to obtain, for the first time, a multivariable model with a fit (FIT) of
over 90 %. The model obtained approximated one with a first-order structure
with transport delay, taking into account the recommendations of the
specialised literature for this type of process. The validation of the model
with high precision measurements allowed obtaining a modelling error of up
to 4, 44%. Finally, based on the model obtained, the limitations of the
existing control system are evaluated and future research on the
performance of these systems is proposed.
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Universidad de Oriente 