Search for dissertations about: "energy-production"

Showing result 1 - 5 of 208 swedish dissertations containing the word energy-production.

  2. 1. Land Use Conflicts between Agriculture and Energy Production : Systems Approaches to Allocate Potentials for Bioenergy and Agrophotovoltaics

    Author : Daniel Ketzer; Peter Schlyter; Henrik Ny; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Renewable energies; Geographic Information Systems; Agrophotovoltaics; Participatory technology development; Responsible Research and Innovation; Physical Geography; naturgeografi;

    Abstract : The developments towards a bio-based economy and a renewable energy-based power supply require thorough assessments of feedstocks and frameworks. In the past, political targets for increasing shares of renewable energies for combatting climate change have triggered direct land use changes (LUCs) and even indirect land use changes (iLUCs). READ MORE

  4. 2. Forecasting of Icing Related Wind Energy Production Losses : Probabilistic and Machine Learning Approaches

    Author : Jennie Molinder; Anna Sjöblom; Heiner Körnich; Hans Bergström; Erik Nilsson; Sue Ellen Haupt; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Wind energy; Icing on wind turbines; Machine learning; Probabilistic forecasting; Meteorologi; Meteorology;

    Abstract : Icing on wind turbine blades causes significant production losses for wind energy in cold climate. Next-day forecasts of these production losses are crucial for the power balance in the electrical grid and for the trading process, but they are uncertain due to lack of understanding of, and simplifications, in the modelling chain. READ MORE

  5. 3. Activity concentrations of radionuclides in energy production from peat, wood chips and straw

    Author : Robert Hedvall; Kärnfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Radionuclides; peat; wood; chips; straw; bioenergy; biomass; district heating; emission; Cs; Physics; Chernobyl; Radioactivity; Fysik; Technological sciences; Teknik; Fysicumarkivet A:1997:Hedvall;

    Abstract : In this thesis quantitative analyses of radionuclide concentrations in bioenergy fuels such as peat, wood chips and straw are presented. For comparison a brief description is included of radionuclide concentrations and radiation doses from other sources of power and also from some industrial applications. READ MORE

  6. 4. Fluid Dynamics and Erosion in a Fluidized Bed for Energy Production. A Numerical and Experimental Study

    Author : Klas Johansson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; experimental validation; multiphase flow; energy; two-fluid model; environment;

    Abstract : This thesis presents an experimental and a numerical investigation of fluid dynamics and erosion of heat transfer tubes in fluidized beds for energy conversion. The objective is to obtain recommendations for suitable models that can be used to predict the fluid dynamics and material wastage of heat exchanger tubes in fluidized beds. READ MORE

  7. 5. Configuration study of large wind parks

    Author : Stefan Lundberg; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; production cost; PCC; power quality; offshore; HVDC; wind parks; DC DC converters; control; losses; configurations; flicker; energy capture;

    Abstract : In this thesis, layouts of various large-scale wind parks, using both AC as well as DC, are investigated. Loss modelling of the wind park components as well as calculations of the energy capture of the turbines using various electrical systems are performed, and the energy production cost of the various park configurations is determined. READ MORE