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Trafczyński, Marian; Markowski, Mariusz; Pavlovičová, Erika; Oravec, Juraj, 2024, "Development of a dynamics model and the study on the influence of industrial constraints on the dynamic behavior of a PID-controlled and robust MPC-controlled hybrid heat-integrated distillation system with heat and mass exchanger.", https://doi.org/10.18150/IOVWN5, RepOD, V1
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The dynamic model of the apparatus used for thermal rectification of mixtures was developed, where in a channel-type exchanger the thermal separation of substances is accompanied by diaphragm heat exchange. The behavior of a PID-Controlled and Tube MPC-controlled Hybrid Heat-Integrated Distillation System (HHIDiS) with a Heat and Mass Exchanger (HME) unit is simulated using Simulink/MATLAB and the influence of industrial constraints (grow up of deposits on the heat transfer surface or hold up of liquid inside the channel of exchanger) on specific indices of quality of operation is investigated. According to the obtained results, the authors observed that when the thermal resistance of fouling and/or hold up of liquid is increased, the thermal inertia of HME, condenser and reboiler is changed, leading to changes in the dynamic behaviour of PID-control and robust MPC-control loops. Such changes were detected by studying the closed-loop HHIDiS system responses simulated at the different stages of fouling build-up and hold up of liquid.
The results were generated within:
Opracowano dynamiczny model aparatury stosowanej do termicznej rektyfikacji mieszanin, gdzie w wymienniku kanałowym termicznemu rozdzieleniu substancji towarzyszy wymiana ciepła za pomocą przepony. Symulowano zachowanie hybrydowego układu destylacji zintegrowanego cieplnie (HHIDiS), sterowanego regulatorami PID i robust MPC, z jednostką wymiennika ciepła i masy (HME) przy użyciu Simulink/MATLAB, a także badano wpływ ograniczeń przemysłowych (narastanie osadów na powierzchni wymiany ciepła lub zatrzymywanie cieczy wewnątrz kanału wymiennika) na określone wskaźniki jakości sterowania. Zgodnie z uzyskanymi wynikami autorzy zaobserwowali, że gdy wzrasta opór cieplny zanieczyszczeń i/lub zatrzymywanie cieczy, bezwładność cieplna HME, skraplacza i reboilera ulega zmianie, co prowadzi do zmian w dynamicznym zachowaniu pętli sterowania PID i robust MPC. Takie zmiany zaobserwowano, badając odpowiedzi układu HHIDiS w pętli zamkniętej symulowane na różnych etapach gromadzenia się zanieczyszczeń i zatrzymywania cieczy.
Wyniki zostały wygenerowane w ramach:
heat-integrated distillation, heat and mass exchanger, hybrid system, thermal separation, dynamic model, lumped-parameter approach, on-line control
Markowski M., Trafczynski M., Kisielewski P., The dynamic model of a rectification heat exchanger using the concept of heat-integrated distillation column. Energy, Vol. 256, Article 124622, 2022. DOI: 10.1016/j.energy.2022.124622 https://doi.org/10.1016/j.energy.2022.124622 doi: 10.1016/j.energy.2022.124622
CC BY - Creative Commons Attribution 4.0
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