Search for dissertations about: "Jan Niemi"

Found 2 swedish dissertations containing the words Jan Niemi.

2. 1. Online characterization of wood pulp : foundations for a photoacoustic sensing technique

   Author : Jan Niemi; Mike Somekh; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

   Abstract : Today, there is an increasing demand in the paper industry for better utilisation of the raw material and improved energy efficiency. Also, the increasing use of recycled paper in the manufacturing process leads to a situation where the knowledge of pulp properties needs to be improved and controlled. READ MORE

4. 2. Towards a new sensing strategy for measuring paper pulp properties : a combination of ultrasonic and optical measurement techniques

   Author : Jan Niemi; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industrial Electronics; Industriell elektronik;

   Abstract : In the manufacturing process of paper the mass fraction and material properties of the fibres in the pulp suspension are important for the strength and quality of the finished product. The properties of the fibres in the pulp suspension that enters the paper machine is not well understood and therefore an adequate prediction of the strength and quality of the finished paper is not possible. READ MORE