Blar i SINTEF Open på forfatter "Halvorsen, Ivar Johan"

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    • A Shortcut Design for Kaibel Columns Based on Minimum Energy Diagrams 

      Ghadrdan, Maryam; Halvorsen, Ivar Johan; Skogestad, Sigurd (Journal article; Peer reviewed, 2011)
      In this paper, a shortcut procedure is proposed to design a 4-product dividing-wall column. It is based on the information derived from Vmin diagram. This has the advantage of having more meaningful guesses for energy ...

    • A simple approach for on-line PI controller tuning using closed-loop setpoint responses 

      Shamsuzzoha, Mohammad; Skogestad, Sigurd; Halvorsen, Ivar Johan (Journal article; Peer reviewed, 2010)

    • Dividing wall columns for natural gas liquefaction plants 

      Halvorsen, Ivar Johan; Dejanovic, Igor; Olujic, Zarko; Skogestad, Sigurd (Journal article; Peer reviewed, 2018)
      In order to meet current carbon dioxide emissions reduction challenges, natural gas processing and refining industries have to find the ways to minimize energy requirements of distillation operations. Building on foundations ...

    • Energy efficient distillation 

      Skogestad, Sigurd; Halvorsen, Ivar Johan (Journal article; Peer reviewed, 2011)
      Distillation is responsible for a significant amount of the energy consumption of the world’s process industry and also in the natural gas processing. There is a significant energy saving potential that can be obtained by ...

    • Hydraulic Design of Thermally Coupled Columns and a DWC for NGL Fractionation Plants 

      Dejanovic, Igor; Halvorsen, Ivar Johan; Jansen, Helmut; Olujic, Zarko (Journal article; Peer reviewed, 2018)
      Combining a conventional demethanizer with thermally coupled deethanizer and propane-butane recovery columns or a three-product dividing wall column (DWC) provides a realistic opportunity for natural gas liquids (NGL) ...

    • Multi-Product Dividing Wall Columns: A Simple and Effective Assessment and Conceptual Design Procedure 

      Halvorsen, Ivar Johan; Skogestad, Sigurd; Dejanovic, Igor; Matijasevic, Ljubica; Olujic, Zarko (Journal article; Peer reviewed, 2011)
      The objective of this paper is to further exploit and demonstrate the potential benefits of a V-min diagram based analysis, using a fifteen component feed mixture as base case. Detailed explanations are given on how to ...

    • A novel hybrid analysis and modeling approach applied to aluminum electrolysis process 

      Lundby, Erlend Torje Berg; Rasheed, Adil; Gravdahl, Jan Tommy; Halvorsen, Ivar Johan (Peer reviewed; Journal article, 2021)
      Aluminum electrolysis cells are characterized by harsh environments where several measurements have to be done manually. Due to the operational costs related to manual sampling, the sampling rates of these measurements are ...

    • On controllability of four-product dividing wall columns 

      Lukac, Goran; Halvorsen, Ivar Johan; Olujic, Zarko; Dejanovic, Igor (Journal article; Peer reviewed, 2018)
      Although potential for reduction of energy requirement and related carbon dioxide emissions is highly attractive – around 50% compared to conventional three column sequences – process industries are still reluctant to ...

    • The impact of process design decisions on operability and control of an LNG process 

      Michelsen, Finn Are; Halvorsen, Ivar Johan; Lund, Berit Floor (Journal article; Peer reviewed, 2010)
      This paper describes a framework for integrated process and control structure design, and applies this framework to a Liquefied Natural Gas (LNG) process design. The overall aim of the work is to contribute to the ...