Sökning: "bed expansion"

Visar resultat 1 - 5 av 15 avhandlingar innehållade orden bed expansion.

  1. 1. Fluid Dynamics of the Bottom Bed of Circulating Fluidized Bed Boilers

    Författare :Anders Svensson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fluidized beds; circulating fluidized bed boilers; fluctuations; fluidization regimes; bottom bed; bed porosity; fluid dynamics; bubbling beds; circulating fluidized beds; non-slugging; bed expansion; particle concentration;

    Sammanfattning : The fluid dynamic conditions in the furnace of a fluidized bed boiler influence the combustion and the production of harmful emissions. A substantial amount of the bed material in a circulating fluidized bed (CFB) boiler is present as a dense bubbling bottom bed. LÄS MER

  3. 2. Bed expansion and slumping of fluidized beds

    Författare :Sven B Andersson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bed expansion; sintering; slumping; internals; modelling; puffing technique; thermal behaviour; fluidization regimes; Fluidized bed boilers;

    Sammanfattning : .... LÄS MER

  4. 3. Fluid dynamics and heat transfer in fluidized beds - with applications to boilers

    Författare :Filip Johnsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; particle concentration; bed expansion; fluidized beds; non-slugging; fluidized bed boilers; tubes; fluid dynamics; fluidization regimes; bottom bed; internals; heat transfer; modelling;

    Sammanfattning : .... LÄS MER

  5. 4. A Numerical Study of the Fluid Dynamics of Bubbling Fluidized Beds

    Författare :Hans Enwald; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; validation; two-phase solver; multiblock; statistical bubble parameters; parallelization; bed expansion ratio; bubbling fluidized bed; two-fluid model;

    Sammanfattning : The two-fluid model was evaluated as a tool for predicting local flow behaviour in bubbling fluidized beds. A review is given of the two-fluid model approach for simulation of the flow in bubbling fluidized beds. LÄS MER

  7. 5. Hydrodynamics, Erosion and Heat Transfer in Pressurized Fluidized Beds

    Författare :Jan Wiman; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; hydrodynamics erosion; heat transfer; tubes; fluidized bed; gas flow; pressurized fluidized bed; bubble;

    Sammanfattning : Measurements of hydrodynamics, local tube erosion and local instantaneous bed-to-tube heat transfer were carried out in a cold, pressurized, fluidized bed with different horizontal tube banks. The influence of pressure, fluidization velocity, particle size and tube-bank geometry was studied. LÄS MER