Sökning: "Bubbling fluidized beds"

Hittade 4 uppsatser innehållade orden Bubbling fluidized beds.

1. 1. Värmeöverföring mellan två zoner i en bubblande fluidiserad bädd

   Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

   Författare :Christian Stigsson; [2018]
   Nyckelord :Heat transfer; fluidized beds; multi-staging; Eulerian-Eulerian two-fluid; Technology and Engineering;

   Sammanfattning : In this Master's thesis, the heat transfer between two zones in a bubbling fluidized bed and the resultant temperature field were examined using a laminar Eulerian-Eulerian two-fluid model in computational fluid dynamics. The purpose was to estimate the thermal potential to multi-stage a combined heat and power boiler by integration therein of a communicating gasification reactor, which utilizes heat from the combustion, and to analyze how different construction parameters influence the homogeneity of the gas temperature field. LÄS MER

3. 2. Investigation of the Effects of Introducing Hydrodynamic Parameters into a Kinetic Biomass Gasification Model for a Bubbling Fluidized Bed

   Master-uppsats, Mälardalens högskola/Akademin för ekonomi, samhälle och teknik

   Författare :Daniel Andersson; Martin Karlsson; [2014]
   Nyckelord :Gasification; Gasifier; Biomass; Bubbling fluidized beds; Reaction kinetics;

   Sammanfattning : Biomass is an alternative to fossil fuels that has a lower impact on the environment and is thus of great interest to replace fossil fuels for energy production. There are several technologies to convert the stored energy in biomass into useful energy and this thesis focuses on the process of gasification. LÄS MER

4. 3. Propensity of bed materials used in dual fluidized beds to retain ash-forming elements from biomass fuels

   Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Energy and Technology

   Författare :Björn Folkeson; [2014]
   Nyckelord :fluidized bed; ash retention; gasification; combustion; bed material;

   Sammanfattning : The main aim of this work was to investigate the propensity of bed materials to retain ash-forming elements from biomass under conditions relevant to dual fluidized bed gasification (DFBG). The investigation was carried out in a laboratory-scale bubbling fluidized bed reactor in which biomass was gasified with steam and the unconverted char was combusted in the temperature range 800–900 ° C. LÄS MER

5. 4. Propensity of bed materials used in dual fluidized beds to retain ash-forming elements from biomass fuels

   Uppsats för yrkesexamina på avancerad nivå,

   Författare :Björn Folkeson; [2014]
   Nyckelord :Fluidized bed; ash retention; gasification; combustion; bed material; Fluidiserad bädd; askämnen; förgasning; förbränning; bäddmaterial;

   Sammanfattning : The main aim of this work was to investigate the propensity of bed materials to retain ash-forming elements from biomass under conditions relevant to dual fluidized bed gasification (DFBG). The investigation was carried out in a laboratory-scale bubbling fluidized bed reactor in which biomass was gasified with steam and the unconverted char was combusted in the temperature range 800–900 ° C. LÄS MER