Implementing robust thermodynamic model for reliable bubble/dew problem solution in cryogenic distillation of air separation units
High accuracy in Equations of State (EoSs) is becoming a more and more critical aspect for design and operational purposes in different areas of chemical and process engineering. It is well-known that improper predictions of mixture properties provide large deviations in process simulations, process...
Main Authors: | , , , , , , |
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Format: | Article |
Language: | English |
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Elsevier
2021-05-01
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Series: | International Journal of Thermofluids |
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Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202721000215 |
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author | Filippo Bisotti Andrea Galeazzi Luca Galatioto Fabio Masserdotti Alessandro Bigi Pierluigi Gritti Flavio Manenti |
author_facet | Filippo Bisotti Andrea Galeazzi Luca Galatioto Fabio Masserdotti Alessandro Bigi Pierluigi Gritti Flavio Manenti |
author_sort | Filippo Bisotti |
collection | DOAJ |
description | High accuracy in Equations of State (EoSs) is becoming a more and more critical aspect for design and operational purposes in different areas of chemical and process engineering. It is well-known that improper predictions of mixture properties provide large deviations in process simulations, process control actions, estimation of operative conditions, assessment of performance indexes and optimal unit/process design. These deviations are strongly emphasized when typical operating conditions appear rather severe. One of the most challenging application sectors is represented by cryogenic separations and especially in case their nominal operating conditions approach the critical point. Air Separation Units (ASUs) are the ideal application field to demonstrate these criticisms. In addition, dedicated EoSs sometimes lacks in implementation details and thermodynamic parameters, making the reliability target impossible to be achieved. The present paper is aimed at bridging the current gaps in the implementation of Bender EoS for the reliable prediction of air mixture properties as well as the reliable simulation of ASU plants. The implementation requires the description of robust and efficient algorithms. At last, a quantitative comparison between the proposed approach and the existing solutions is provided. |
first_indexed | 2024-12-22T00:02:59Z |
format | Article |
id | doaj.art-fa3a20fe09164c1584d4f075f7ad57ce |
institution | Directory Open Access Journal |
issn | 2666-2027 |
language | English |
last_indexed | 2024-12-22T00:02:59Z |
publishDate | 2021-05-01 |
publisher | Elsevier |
record_format | Article |
series | International Journal of Thermofluids |
spelling | doaj.art-fa3a20fe09164c1584d4f075f7ad57ce2022-12-21T18:45:38ZengElsevierInternational Journal of Thermofluids2666-20272021-05-0110100083Implementing robust thermodynamic model for reliable bubble/dew problem solution in cryogenic distillation of air separation unitsFilippo Bisotti0Andrea Galeazzi1Luca Galatioto2Fabio Masserdotti3Alessandro Bigi4Pierluigi Gritti5Flavio Manenti6Politecnico di Milano, CMIC Dept. “Giulio Natta”, Piazza Leonardo da Vinci 32, 20133 Milan, ItalyPolitecnico di Milano, CMIC Dept. “Giulio Natta”, Piazza Leonardo da Vinci 32, 20133 Milan, ItalySIAD Macchine e Impianti, Via San Bernardino 92, 24100 Bergamo, ItalySIAD Macchine e Impianti, Via San Bernardino 92, 24100 Bergamo, ItalySIAD Macchine e Impianti, Via San Bernardino 92, 24100 Bergamo, ItalySIAD Macchine e Impianti, Via San Bernardino 92, 24100 Bergamo, ItalyPolitecnico di Milano, CMIC Dept. “Giulio Natta”, Piazza Leonardo da Vinci 32, 20133 Milan, Italy; Corresponding author.High accuracy in Equations of State (EoSs) is becoming a more and more critical aspect for design and operational purposes in different areas of chemical and process engineering. It is well-known that improper predictions of mixture properties provide large deviations in process simulations, process control actions, estimation of operative conditions, assessment of performance indexes and optimal unit/process design. These deviations are strongly emphasized when typical operating conditions appear rather severe. One of the most challenging application sectors is represented by cryogenic separations and especially in case their nominal operating conditions approach the critical point. Air Separation Units (ASUs) are the ideal application field to demonstrate these criticisms. In addition, dedicated EoSs sometimes lacks in implementation details and thermodynamic parameters, making the reliability target impossible to be achieved. The present paper is aimed at bridging the current gaps in the implementation of Bender EoS for the reliable prediction of air mixture properties as well as the reliable simulation of ASU plants. The implementation requires the description of robust and efficient algorithms. At last, a quantitative comparison between the proposed approach and the existing solutions is provided.http://www.sciencedirect.com/science/article/pii/S2666202721000215Air mixtureAir separation unitsBender equation of stateBubble and dew point problemsNon-cubic equation of state (NCEoS)Robust and efficient algorithm |
spellingShingle | Filippo Bisotti Andrea Galeazzi Luca Galatioto Fabio Masserdotti Alessandro Bigi Pierluigi Gritti Flavio Manenti Implementing robust thermodynamic model for reliable bubble/dew problem solution in cryogenic distillation of air separation units International Journal of Thermofluids Air mixture Air separation units Bender equation of state Bubble and dew point problems Non-cubic equation of state (NCEoS) Robust and efficient algorithm |
title | Implementing robust thermodynamic model for reliable bubble/dew problem solution in cryogenic distillation of air separation units |
title_full | Implementing robust thermodynamic model for reliable bubble/dew problem solution in cryogenic distillation of air separation units |
title_fullStr | Implementing robust thermodynamic model for reliable bubble/dew problem solution in cryogenic distillation of air separation units |
title_full_unstemmed | Implementing robust thermodynamic model for reliable bubble/dew problem solution in cryogenic distillation of air separation units |
title_short | Implementing robust thermodynamic model for reliable bubble/dew problem solution in cryogenic distillation of air separation units |
title_sort | implementing robust thermodynamic model for reliable bubble dew problem solution in cryogenic distillation of air separation units |
topic | Air mixture Air separation units Bender equation of state Bubble and dew point problems Non-cubic equation of state (NCEoS) Robust and efficient algorithm |
url | http://www.sciencedirect.com/science/article/pii/S2666202721000215 |
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