Search for dissertations about: "Paper machine"

Showing result 1 - 5 of 218 swedish dissertations containing the words Paper machine.

  1. 1. Modeling and simulation of paper structure development

    University dissertation from Sweden : Mid Sweden University

    Author : Stefan B Lindström; Tetsu Uesaka; Myat Htun; Cyrus Aidun; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Forming; Fibre; Paper; Fibre suspension; Paper structure; Simulation; Rheology;

    Abstract : A numerical tool has been developed for particle-level simulations of fibre suspension flows, particularly forming of the fibre network structure of paper sheets in the paper machine. The model considers inert fibres of various equilibrium shapes, and finite stiffness, interacting with each other through normal, frictional, and lubrication forces, and with the surrounding fluid medium through hydrodynamic forces. READ MORE

  2. 2. Baggy paper webs Effect of uneven moisture and grammage profiles in different process steps

    University dissertation from Karlstad : Karlstads universitet

    Author : Cecilia Land; Lennart Stolpe; Kaarlo Niskanen; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bagginess; drying; calendering; grammage; moisture content; paper; profile; reels; softwood kraft pulp; storage; strain; tension; web; Chemical Engineering; Kemiteknik;

    Abstract : One of the problems encountered in paper converting is caused by the occurrence of "baggy webs", which essentially is when the tension profile of the paper web is uneven. In an area with low tension the paper is longer, which results in bagginess. READ MORE

  3. 3. Modelling and simulation of paper structure development

    University dissertation from Sundsvall : Department of Natural Sciences, Engineering and Mathematics, Mid Sweden University

    Author : Stefan Lindström; Tetsu Uesaka; Myat Htun; Cyrus Aidun; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Forming; Fibre; Paper; Fibre suspension; Paper structure; Simulation; Rheology; TECHNOLOGY Chemical engineering; TEKNIKVETENSKAP Kemiteknik; TECHNOLOGY Engineering physics; TEKNIKVETENSKAP Teknisk fysik;

    Abstract :      A numerical tool has been developed for particle-level simulations of fibre suspension flows, particularly forming of the fibre network structure of paper sheets in the paper machine. The model considers inert fibres of various equilibrium shapes, and finite stiffness, interacting with each other through normal, frictional, and lubrication forces, and with the surrounding fluid medium through hydrodynamic forces. READ MORE

  4. 4. Static and Dynamic Modelling of the Drying Section of a Paper Machine

    University dissertation from Department of Chemical Engineering, Lund University

    Author : Magnus Karlsson; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Pappers- och massateknik; Modelling; Wood; Paper; Multi-Cylinder; Simulation; Control; Steam; Air; Dew Point; Moisture Gradients; pulp and paper technology; Pressure Gradients;

    Abstract : The paper making process involves chopping of wood, cooking and forming, followed by dewatering in a vacuum section, press section and drying section. Several models for the most important parts of the paper machine drying section are presented in this thesis to describe phenomena at steady state and during state transitions. READ MORE

  5. 5. On paper machine headbox control

    University dissertation from Luleå : Luleå tekniska universitet

    Author : John Erik Larsson; [1997]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reglerteknik; Control Engineering;

    Abstract : .... READ MORE