Browsing Institutt for kjemisk prosessteknologi by Author "Das, Tamal"
Now showing items 1-8 of 8
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Changing between Active Constraint Regions for Optimal Operation: Classical Advanced Control versus Model Predictive Control
Reyes-Lúa, Adriana; Zotica, Cristina Florina; Das, Tamal; Krishnamoorthy, Dinesh; Skogestad, Sigurd (Journal article; Peer reviewed, 2018)Control structures must be properly designed and implemented to maintain optimality. The two options for the supervisory control layer are Advanced Control Structures (ACS) and Model Predictive Control (MPC). To systematically ... -
Modeling and control of an inline deoiling hydrocyclone *
Das, Tamal; Jäschke, Johannes (Journal article; Peer reviewed, 2018)In subsea oil and gas production and processing, automatic control of operation is of significant importance. Typically, processing in subsea fields involves separation of hydrocarbons from water and rejection of water in ... -
Modeling, estimation and control for optimal operation of separation processes in oil and gas industry
Das, Tamal (Doctoral theses at NTNU;2018:234, Doctoral thesis, 2018)The primary focus of this thesis is to develop models for oil and gas separation processes. These models form the basis for estimation of unmeasured variables and the control of important process variables. The secondary ... -
Modelling a Multiphase Subsea Separation System
Bishop, Torstein Alexander (Master thesis, 2016)With the oil and gas industry changing rapidly and new oil-fields becoming less accessible, the demand for new technology and innovative thinking is increasing. With these challenges in mind a possible solution could be ... -
Modelling and Control of Coalescence Based Gravity Separators in a Subsea Separation System - with Models of Produced Water Treatment
Heggheim, Sindre Johan (Master thesis, 2018)Subsea separation of well fluids is a way to reduce the cost of topside processing, and to simplify and reduce the export of products. Subsea separation consist of bulk separators and purifiers, to separate the multi-phase ... -
Optimal operation of a subsea separation system including a coalescence based gravity separator model and a produced water treatment section
Das, Tamal; Heggheim, Sindre Johan; Dudek, Marcin; Verheyleweghen, Adriaen; Jäschke, Johannes (Journal article; Peer reviewed, 2019)In this work, we develop a model for a gravity separator, and we use it together with models from the literature to study the control of a subsea separation system that separates oil, gas, and water from well fluids in ... -
Real Time Optimization and Nonlinear Model Predictive Control of a Gas Lifted Oil Network
Yahia, Sarry Haj (Master thesis, 2018)As oil reserves become scarcer, oil production and recovery must be enhanced. The gas lift is one of the techniques used to enhance oil production and recovery. It is usually used in reservoirs that suffer from insufficient ... -
Simplified First-Principles Model of a Compact Flotation Unit for Use in Optimization and Control
Das, Tamal; Jäschke, Johannes (Journal article; Peer reviewed, 2019)In this paper, we develop a simplified control-oriented model of a compact flotation unit (CFU), which removes residual oil from produced water in oil and gas production systems. CFU is a class of separators that exploits ...