SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Pallares A) srt2:(2010-2014)"

Sökning: WFRF:(Pallares A) > (2010-2014)

  • Resultat 1-2 av 2
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Almendros-Ibáñez, J. A., et al. (författare)
  • Voidage distribution around bubbles in a fluidized bed
  • 2010
  • Ingår i: Powder Technology. - : Elsevier BV. - 1873-328X .- 0032-5910. ; 197:1, s. 73-82
  • Tidskriftsartikel (refereegranskat)abstract
    • n this work, a new method for measuring void fraction distribution around endogenous bubbles in a 2D fluidized bed is presented. The technique is based on illuminating a transparent-wall 2-dimensional bed with diffuse light from the rear and recording the distribution of light that penetrates the bed. The recording is made with a high speed video-camera, which gives frames with grey level corresponding to the light penetration and from which the voidage distribution around the bubbles can be determined. In this way, voidage distribution in the region very close to the bubble contour (r/Rb less, approximate 1.2) is obtained, which was not possible in previous studies due to limitations in spatial resolution. A correlation is proposed for the voidage at the contour of the bubble, with the voidage depending on the radial position and the polar angle.In addition, the effect of the voidage distribution on the throughflow crossing the bubbles was studied and an increase of 20% was determined for the average bubble geometry of the more than 100 bubbles analysed.
  •  
2.
  • Bu, C. S., et al. (författare)
  • Ignition behavior of single coal particle in a fluidized bed under O-2/CO2 and O-2/N-2 atmospheres: A combination of visual image and particle temperature
  • 2014
  • Ingår i: Applied Energy. - : Elsevier BV. - 1872-9118 .- 0306-2619. ; 115, s. 301-308
  • Tidskriftsartikel (refereegranskat)abstract
    • Single coal particle ignition behavior was studied in a two-dimensional (200 mm x 20 mm x 400 mm) fluidized bed under O-2/N-2 and O-2/CO2 atmosphere with O-2 volume concentration in the range of 0-40%, by a combination of visual observation of the volatile flame and measurement of the particle center temperature. A piece of transparent quartz glass was used as the front wall of the fluidized bed to allow visual observation. The investigated fuel particles were spherical sub-bituminous coal particles with diameter in a range of 6-13 mm, which were artificially carved from selected original coal particles. The volatile combustion flame was recorded by a color video camera to analyze its ignition time delay and extinction behavior. The temperature in the particle center was measured by a very thin thermocouple to follow the particle heating process. Results indicate that under O-2/CO2 atmosphere the ignition delay time is much longer than in O-2/N-2 atmosphere. The devolatilization process is controlled by internal and external heat transfer but it is almost unaffected by atmosphere at the same O-2 concentration. The effect of volatile combustion on heating and extinction delay time can be neglected for larger coal particles.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-2 av 2

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy