Control pairings of a deoiling membrane crossflow filtration process based on theoretical and experimental results

Kasper Lund Jepsen, Simon Pedersen, Zhenyu Yang

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Despite membrane filtration being extensively used in many industries, it is not widely used for offshore produced water treatment because of the large installation footprint required. Commonly, PID-controllers are deployed to maintain the operating conditions that minimize fouling, but the design of the controllers is rarely highlighted. The interaction between the deployed controllers can cause undesired performance and even instability. In this study, the relative gain array method was used to find the set of control pairings that minimized the interaction between the control loops. Experimental results showed that by accounting for cross couplings in the design phase of the control system, the controllers performance in terms of reference tracking can be improved significantly. By improving the reference tracking and disturbance rejection capabilities of the filtration system, the selected operating point which minimizes fouling growth, can be maintained consistently subject to disturbances in terms of varying feed flow rate. Better tracking of the operating point can reduce membrane resistance, and consequently reducing the operating cost.
OriginalsprogEngelsk
TidsskriftJournal of Process Control
Vol/bind81
Sider (fra-til)98-111
Antal sider14
ISSN0959-1524
DOI
StatusUdgivet - sep. 2019

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Cross-flow
Pairing
Filtration
Membrane
Membranes
Controller
Controllers
Experimental Results
Fouling
Minimise
Disturbance Rejection
PID Controller
Interaction
Flow Rate
Disturbance rejection
Disturbance
Water treatment
Control System
Operating costs
Industry

Citer dette

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title = "Control pairings of a deoiling membrane crossflow filtration process based on theoretical and experimental results",
abstract = "Despite membrane filtration being extensively used in many industries, it is not widely used for offshore produced water treatment because of the large installation footprint required. Commonly, PID-controllers are deployed to maintain the operating conditions that minimize fouling, but the design of the controllers is rarely highlighted. The interaction between the deployed controllers can cause undesired performance and even instability. In this study, the relative gain array method was used to find the set of control pairings that minimized the interaction between the control loops. Experimental results showed that by accounting for cross couplings in the design phase of the control system, the controllers performance in terms of reference tracking can be improved significantly. By improving the reference tracking and disturbance rejection capabilities of the filtration system, the selected operating point which minimizes fouling growth, can be maintained consistently subject to disturbances in terms of varying feed flow rate. Better tracking of the operating point can reduce membrane resistance, and consequently reducing the operating cost.",
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Control pairings of a deoiling membrane crossflow filtration process based on theoretical and experimental results. / Jepsen, Kasper Lund; Pedersen, Simon; Yang, Zhenyu.

I: Journal of Process Control, Bind 81, 09.2019, s. 98-111.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Control pairings of a deoiling membrane crossflow filtration process based on theoretical and experimental results

AU - Jepsen, Kasper Lund

AU - Pedersen, Simon

AU - Yang, Zhenyu

PY - 2019/9

Y1 - 2019/9

N2 - Despite membrane filtration being extensively used in many industries, it is not widely used for offshore produced water treatment because of the large installation footprint required. Commonly, PID-controllers are deployed to maintain the operating conditions that minimize fouling, but the design of the controllers is rarely highlighted. The interaction between the deployed controllers can cause undesired performance and even instability. In this study, the relative gain array method was used to find the set of control pairings that minimized the interaction between the control loops. Experimental results showed that by accounting for cross couplings in the design phase of the control system, the controllers performance in terms of reference tracking can be improved significantly. By improving the reference tracking and disturbance rejection capabilities of the filtration system, the selected operating point which minimizes fouling growth, can be maintained consistently subject to disturbances in terms of varying feed flow rate. Better tracking of the operating point can reduce membrane resistance, and consequently reducing the operating cost.

AB - Despite membrane filtration being extensively used in many industries, it is not widely used for offshore produced water treatment because of the large installation footprint required. Commonly, PID-controllers are deployed to maintain the operating conditions that minimize fouling, but the design of the controllers is rarely highlighted. The interaction between the deployed controllers can cause undesired performance and even instability. In this study, the relative gain array method was used to find the set of control pairings that minimized the interaction between the control loops. Experimental results showed that by accounting for cross couplings in the design phase of the control system, the controllers performance in terms of reference tracking can be improved significantly. By improving the reference tracking and disturbance rejection capabilities of the filtration system, the selected operating point which minimizes fouling growth, can be maintained consistently subject to disturbances in terms of varying feed flow rate. Better tracking of the operating point can reduce membrane resistance, and consequently reducing the operating cost.

KW - Relative gain array

KW - Membrane

KW - Control parings

KW - Separation

KW - Multi-phase

KW - Oil and gas

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DO - https://doi.org/10.1016/j.jprocont.2019.05.009

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