An efficient and rigorous thermodynamic library and optimal-control of a cryogenic air separation unit

Jozsef Gaspar; Tobias Kasper Skovborg Ritschel; John Bagterp Jørgensen

doi:10.1016/B978-0-444-63965-3.50259-2

An efficient and rigorous thermodynamic library and optimal-control of a cryogenic air separation unit

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

Cryogenic air separation (CAS) is the leading technology for large scale production of pure N2, O2 and Ar. This process is very electric-energy intensive; thus it is a likely candidate for load balancing of power stations in a smart grid. This type of intermittent operation of CAS, requires a non-linear model based control to achieve optimal techno-economic performance. Accordingly, this work presents a computationally efficient and novel approach for solving a tray-by-tray equilibrium model and its implementation for open-loop optimal-control of a cryogenic distillation column. Here, the optimisation objective is to reduce the cost of compression in a volatile electricity market while meeting the production requirements, i.e. product flow rate and purity. This model is implemented in Matlab and uses the ThermoLib rigorous thermodynamic library. The present work represents a first step towards plant-wide dynamic modelling and smart control of a cryogenic distillation plant.

Original language	English
Title of host publication	Proceedings of the 27th European Symposium on Computer Aided Process Engineering – ESCAPE 27
Volume	40
Publisher	Elsevier
Publication date	2017
Pages	1543-1548
DOIs	https://doi.org/10.1016/B978-0-444-63965-3.50259-2
Publication status	Published - 2017
Event	27th European Symposium on Computer Aided Process Engineering - Barcelona, Spain Duration: 1 Oct 2017 → 5 Oct 2017 Conference number: 27 https://www.elsevier.com/books/27th-european-symposium-on-computer-aided-process-engineering/espuna/978-0-444-63965-3

Conference

Conference	27th European Symposium on Computer Aided Process Engineering
Number	27
Country/Territory	Spain
City	Barcelona
Period	01/10/2017 → 05/10/2017
Internet address	https://www.elsevier.com/books/27th-european-symposium-on-computer-aided-process-engineering/espuna/978-0-444-63965-3

Series	Computer Aided Chemical Engineering
Volume	40
ISSN	1570-7946

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Cryogenic air separation
Load balancing
Distillation column
Dynamic modeling
Optimal-control

Access to Document

10.1016/B978-0-444-63965-3.50259-2

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Cite this

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title = "An efficient and rigorous thermodynamic library and optimal-control of a cryogenic air separation unit",

abstract = "Cryogenic air separation (CAS) is the leading technology for large scale production of pure N2, O2 and Ar. This process is very electric-energy intensive; thus it is a likely candidate for load balancing of power stations in a smart grid. This type of intermittent operation of CAS, requires a non-linear model based control to achieve optimal techno-economic performance. Accordingly, this work presents a computationally efficient and novel approach for solving a tray-by-tray equilibrium model and its implementation for open-loop optimal-control of a cryogenic distillation column. Here, the optimisation objective is to reduce the cost of compression in a volatile electricity market while meeting the production requirements, i.e. product flow rate and purity. This model is implemented in Matlab and uses the ThermoLib rigorous thermodynamic library. The present work represents a first step towards plant-wide dynamic modelling and smart control of a cryogenic distillation plant.",

keywords = "Cryogenic air separation, Load balancing, Distillation column, Dynamic modeling, Optimal-control",

author = "Jozsef Gaspar and Ritschel, \{Tobias Kasper Skovborg\} and J{\o}rgensen, \{John Bagterp\}",

year = "2017",

doi = "10.1016/B978-0-444-63965-3.50259-2",

language = "English",

volume = "40",

series = "Computer Aided Chemical Engineering",

publisher = "Elsevier",

pages = "1543--1548",

booktitle = "Proceedings of the 27th European Symposium on Computer Aided Process Engineering – ESCAPE 27",

address = "United Kingdom",

note = "27th European Symposium on Computer Aided Process Engineering, ESCAPE 27 ; Conference date: 01-10-2017 Through 05-10-2017",

url = "https://www.elsevier.com/books/27th-european-symposium-on-computer-aided-process-engineering/espuna/978-0-444-63965-3",

}

Gaspar, J, Ritschel, TKS & Jørgensen, JB 2017, An efficient and rigorous thermodynamic library and optimal-control of a cryogenic air separation unit. in Proceedings of the 27th European Symposium on Computer Aided Process Engineering – ESCAPE 27. vol. 40, Elsevier, Computer Aided Chemical Engineering, vol. 40, pp. 1543-1548, 27th European Symposium on Computer Aided Process Engineering, Barcelona, Spain, 01/10/2017. https://doi.org/10.1016/B978-0-444-63965-3.50259-2

An efficient and rigorous thermodynamic library and optimal-control of a cryogenic air separation unit. / Gaspar, Jozsef; Ritschel, Tobias Kasper Skovborg ; Jørgensen, John Bagterp.
Proceedings of the 27th European Symposium on Computer Aided Process Engineering – ESCAPE 27. Vol. 40 Elsevier, 2017. p. 1543-1548 (Computer Aided Chemical Engineering, Vol. 40).

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - An efficient and rigorous thermodynamic library and optimal-control of a cryogenic air separation unit

AU - Gaspar, Jozsef

AU - Ritschel, Tobias Kasper Skovborg

AU - Jørgensen, John Bagterp

N1 - Conference code: 27

PY - 2017

Y1 - 2017

N2 - Cryogenic air separation (CAS) is the leading technology for large scale production of pure N2, O2 and Ar. This process is very electric-energy intensive; thus it is a likely candidate for load balancing of power stations in a smart grid. This type of intermittent operation of CAS, requires a non-linear model based control to achieve optimal techno-economic performance. Accordingly, this work presents a computationally efficient and novel approach for solving a tray-by-tray equilibrium model and its implementation for open-loop optimal-control of a cryogenic distillation column. Here, the optimisation objective is to reduce the cost of compression in a volatile electricity market while meeting the production requirements, i.e. product flow rate and purity. This model is implemented in Matlab and uses the ThermoLib rigorous thermodynamic library. The present work represents a first step towards plant-wide dynamic modelling and smart control of a cryogenic distillation plant.

AB - Cryogenic air separation (CAS) is the leading technology for large scale production of pure N2, O2 and Ar. This process is very electric-energy intensive; thus it is a likely candidate for load balancing of power stations in a smart grid. This type of intermittent operation of CAS, requires a non-linear model based control to achieve optimal techno-economic performance. Accordingly, this work presents a computationally efficient and novel approach for solving a tray-by-tray equilibrium model and its implementation for open-loop optimal-control of a cryogenic distillation column. Here, the optimisation objective is to reduce the cost of compression in a volatile electricity market while meeting the production requirements, i.e. product flow rate and purity. This model is implemented in Matlab and uses the ThermoLib rigorous thermodynamic library. The present work represents a first step towards plant-wide dynamic modelling and smart control of a cryogenic distillation plant.

KW - Cryogenic air separation

KW - Load balancing

KW - Distillation column

KW - Dynamic modeling

KW - Optimal-control

U2 - 10.1016/B978-0-444-63965-3.50259-2

DO - 10.1016/B978-0-444-63965-3.50259-2

M3 - Article in proceedings

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T3 - Computer Aided Chemical Engineering

SP - 1543

EP - 1548

BT - Proceedings of the 27th European Symposium on Computer Aided Process Engineering – ESCAPE 27

PB - Elsevier

T2 - 27th European Symposium on Computer Aided Process Engineering

Y2 - 1 October 2017 through 5 October 2017

ER -

An efficient and rigorous thermodynamic library and optimal-control of a cryogenic air separation unit

Abstract

Conference

UN SDGs

Keywords

Access to Document

OpenUrl availability

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Cite this