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A New Innovative Environmental Friendly and Energy Efficient Fibre Treatment – CFD Investigation

Published: 6 November 2017

Master Thesis

Summary

In Sweden almost 40% of the industrys total electrical energy use linked to the the paper and pulp industry. The aim of the industry is to reduce 50% of energy consumption in a period of 10 years. This project deals with a new innovative energy efficient and sustainable method for the treatment of fibres in the paper and pulp industry with the help of numerical investigation.

Computational Fluid Dynamics (CFD) techniques will be implemented to generate hydrodynamic cavitation for treating the fibres and this in combination of the ultrasonic controlled cavitation will in turn lead develop an environmental friendly reactor concept for the production of pulp and paper. Optimization methods will be used to design, a called ‘Venturi’, as shown in Figure 1 below, in order to achieve the ideal cavitation process.

1

Application of transient method, turbulence modeling will lead to controlled cavitation intensity for ideal fiber development in venturi nozzle as shown in Figure 2.

2

Further development and optimization of parameters will alleviate in the design process to develop a scalable flow reactor concept for a new innovative, energy efficient, environmental friendly and sustainable fiber treatment that can be used in the paper and pulp industry. The thesis work strives towards the following measurable objectives.

  • Publication: Literature summary
  • Product design
  • Development of CFD technology for product design application incl. experimental validation
  • Development of risk analysis and design criteria
  • Publication: Design Manual
  • 2 publications in journals/conferences.

The project will be conducted in cooperation between LTU, Swedish Energy Agency (Energimyndigheten), SCA, Holmen, Stora Enso and Inventia.

Keywords: CFD, Optimization, Turbulence Modelling, Innovation, Sustainable Development

Shankar, Vijay -

Organisation: Engineering Acoustics, Operation, Maintenance and Acoustics, Department of Civil, Environmental and Natural Resources Engineering
Örjan Johansson

Johansson, Örjan - Professor and Head of Subject

Organisation: Engineering Acoustics, Operation, Maintenance and Acoustics, Department of Civil, Environmental and Natural Resources Engineering
Phone: +46 (0)920 491386