A Modeling Framework to Investigate the Influence of Fouling on the Dynamic Characteristics of PID-Controlled Heat Exchangers and Their Networks

Autor: Piotr Kisielewski, Marian Trafczynski, Jacek Wernik, Krzysztof Urbaniec, Mariusz Markowski
Rok vydání: 2019
Předmět:
Work (thermodynamics)
Materials science
020209 energy
Thermal resistance
shell-and-tube heat exchanger network
PID controller
02 engineering and technology
lcsh:Technology
Compensation (engineering)
law.invention
lcsh:Chemistry
020401 chemical engineering
law
PID control
Heat exchanger
0202 electrical engineering
electronic engineering
information engineering
fouling impact
General Materials Science
0204 chemical engineering
Process engineering
lcsh:QH301-705.5
Instrumentation
Distillation
Fluid Flow and Transfer Processes
Fouling
lcsh:T
business.industry
Process Chemistry and Technology
General Engineering
crude oil fouling
lcsh:QC1-999
Computer Science Applications
lcsh:Biology (General)
lcsh:QD1-999
lcsh:TA1-2040
dynamic heat exchanger model
Transient (oscillation)
lcsh:Engineering (General). Civil engineering (General)
business
lcsh:Physics
Zdroj: Applied Sciences, Vol 9, Iss 5, p 824 (2019)
Applied Sciences
Volume 9
Issue 5
ISSN: 2076-3417
DOI: 10.3390/app9050824
Popis: The present work is an extension of the authors&rsquo
previous research, where changes in the dynamic behavior of heat exchangers induced by fouling build-up were studied. In the present work, the authors used the previously elaborated and validated mathematical model of transient heat exchange with the influence of thermal resistance of fouling taken into account. The behavior of specific Heat Exchanger Networks (HENs) coupled with a Crude Distillation Unit together with their control loops is simulated using Simulink/MATLAB and the influence of fouling build-up on specific indices of quality of operation is investigated. According to the presented results, the higher the number of heat exchangers in the PID control loop and the greater the number of heat exchangers interacting in the network, the smaller the influence of fouling on the control quality indices, and in the extreme case, this influence may be negligible. This might be caused by the compensation of the negative effects of fouling build-up when the heat exchangers are interacting in the HEN. Nevertheless, potential adverse effects of fouling on HEN operation can be prevented by periodic adjustments of the optimal values of PID gains.
Databáze: OpenAIRE
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