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Novel Control-Oriented Models for Liquid Transport in Falling Film Evaporator Tubes

Ponomarev, Anton; Hofmann, Julian 1; Gröll, Lutz 1
1 Karlsruher Institut für Technologie (KIT)

Abstract (englisch):
The paper presents novel control-oriented transport models for evaporating liquid films in the tubes of a falling film evaporator. In this context, our goal consists in qualitatively mapping the experimentally observed input-output behavior. Two transport models are proposed, where the difference between them is that one allows overtaking of liquid particles and the other does not. The transport models are equipped with two new models of evaporation which are different from the commonly assumed uniform evaporation. The models are initially developed from the conservation laws in the form of partial differential equations. Using the method of characteristics we then obtain the input-output relations for the proposed models in the form of time-delay equations. The time-delay representation is advantageous for simulation and for the future control design. In a simulation study, we observe the principal properties of the models and find that they correspond well with the experimentally observed input-output behavior.

Postprint §
DOI: 10.5445/IR/1000133230
Veröffentlicht am 20.05.2022
DOI: 10.1016/j.compchemeng.2021.107376
Zitationen: 1
Web of Science
Zitationen: 1
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Automation und angewandte Informatik (IAI)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 09.2021
Sprache Englisch
Identifikator ISSN: 0098-1354
KITopen-ID: 1000133230
HGF-Programm 37.12.01 (POF IV, LK 01) Digitalization & System Technology for Flexibility Solutions
Erschienen in Computers & chemical engineering
Verlag Elsevier
Band 152
Seiten Article no: 107376
Vorab online veröffentlicht am 19.05.2021
Schlagwörter transport model; liquid film; input-output behavior; partial differential equation; time-delay equation; falling film evaporator
Nachgewiesen in Web of Science
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