Search for dissertations about: "fluidized-bed boilers"

Showing result 1 - 5 of 43 swedish dissertations containing the words fluidized-bed boilers.

  2. 1. Nitrous Oxide Emission from Circulating Fluidized Bed Combustion

    Author : Lars-Erik Åmand; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; air supply dependence; fluidized beds; homogeneous heterogeneous reactions; fluidized-bed boilers; bed temperature dependence; N2O emissions; circulating fluidized-bed boilers; gas-concentration profiles;

    Abstract : In the present thesis N2O results are presented from several measurement projects on two commercial circulating fluidized bed (CFB) boilers. Traditional parameter studies have been carried out, as well as test programs where various nitrogen-containing species were injected into the furnace or gas-concentration profiles in the combustion chamber were measured. READ MORE

  4. 2. Heat Transfer in Circulating Fluidized Bed Boilers

    Author : Claes Breitholtz; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; similarity; char; heat transfer; tube wall; circulating fluidized bed; particle; radiation; scaling; particle convection; gas convection;

    Abstract : Heat transfer to single particles in the transport zone of circulating fluidized beds and heat transfer to membrane tube walls have been investigated. The heat transfer coefficient to spheres in the transport zone of a circulating fluidized bed boiler has been measured with dark and light calorimeters. READ MORE

  5. 3. Fluid dynamics of circulating fluidized-bed boilers

    Author : Andreas Johansson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bottom bed; CFB boilers; wall-layer; fluid dynamics; large-scale circulating fluidized bed; loop seal;

    Abstract : .... READ MORE

  6. 4. Fluidized bed combustion - modeling and mixing

    Author : David Pallarès; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fluidized bed combustion; Mixing; Modeling;

    Abstract : First demonstrated on industrial scale in 1976, fluidized bed combustion (FBC) rapidly became an established technology for solid fuel combustion with a currentinstalled capacity of about 30 GWe and power plants ranging from 10 to 460 MWe.The widespread use of the FBC technology both under so-called circulating and bubbling conditions (i.e. READ MORE

  7. 5. Solids Flow Pattern in Circulating Fluidized-bed Boilers

    Author : Andreas Johansson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; scale-up; hydrodynamics; combustion; loop seal; wall-layers; Circulating Fluidized Bed;

    Abstract : The background of this dissertation is the knowledge of circulating fluidized bed (CFB)technology, which has reached a level enabling units of several hundred megawatts ofelectricity to be constructed and employed. Yet an improved understanding of the technologyis needed in order to further develop and optimize large-scale combustion in CFB boilers,especially since the operating conditions and the geometries of large boilers differ from thosetypical for laboratory units, in which most of the research hitherto has been performed. READ MORE