| 1. |
|
|
| 2. |
|
|
| 3. |
- Johnsson, Filip, 1960, et al.
(författare)
-
Air-plemum pressure fluctuations in a circulating fluidized bed boiler
- 1997
-
Ingår i: Proc of the 2nd European Conference on Fluidization. - 8475859259 ; , s. 223-230
-
Konferensbidrag (refereegranskat)abstract
- Interactions between in-bed (furnace) and air-plenum pressure fluctuations were studied in a 12 MWth CFB boiler under various operation conditions. The influence of a change in the characteristics of the air-feed system was studied by changing the pressure drop of the air-distributor dpdist, by means of equal throttling of all nozzles of the air-distributor. The measured pressure fluctuations were characterized by amplitude and power spectra.
|
|
| 4. |
|
|
| 5. |
- Johnsson, Filip, 1960, et al.
(författare)
-
Characteristics of the formation of particle wall-layers in CFB boilers
- 1995
-
Ingår i: Proc of the 2nd International Conference on Multiphase Flow. ; 3, s. FB1-25-FB1-32-
-
Konferensbidrag (refereegranskat)abstract
- The character of the vertical two-phase flow in circulating fluidized bed (CFB)boiler furnaces is compared with results from small CFB risers presented in literature. The particle flow in furnaces as well as in the smaller risers shows a core/wall-layer structure. In the CFB boilers the particle flow pattern develops up through the furnace with the major back-flow caused by separation to the furnace walls. Both the particle wall-layer thickness and the downward flux within this layer increase downwards along the furnace walls. In the smaller units this downward increase is either absent or much smaller, a consequence of a more developed particle flow profile, which, typically, is parabolic in shape.
|
|
| 6. |
- Johnsson, Filip, 1960, et al.
(författare)
-
Expansion of a freely bubbling fluidized bed
- 1991
-
Ingår i: Powder Technology. - 1873-328X .- 0032-5910. ; 68:2, s. 117-123
-
Tidskriftsartikel (refereegranskat)abstract
- The expansion of a freely bubbling fluidized bed is studied over a range of particle properties and gas velocitiesthat applies to fluidized bed boilers. A bed expansion model is derived from a modified two-phase flow model.The results from the model are compared with measurements in both a cold two-dimensional bed and a 16MW,, fluidized bed boiler, as well as with data found in the literature. The model represents experimentalresults for sand particles of a diameter ranging from 0.15 mm to 4.0 mm and with gas velocities up to 3 m s-‘.
|
|
| 7. |
|
|
| 8. |
|
|
| 9. |
- Johnsson, Filip, 1960, et al.
(författare)
-
Fluidization regimes in boilers
- 1995
-
Ingår i: Preprints of Fluidization VIII. ; , s. 129-136
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The fluid dynamics were studied in a fluidized bed boiler and in two laboratory fluidized beds under ambient conditions. The beds had different geometries but were all of a non-slugging type operated with Geldart Group B and D particles. The bed geometry was found to strongly influence the fluid dynamics of the bed.
|
|
| 10. |
- Johnsson, Filip, 1960, et al.
(författare)
-
Fluidization regimes in fluidized bed boilers
- 1992
-
Ingår i: Proc of the 7th Engineering Foundation Conference on Fluidization. - 0939204479 ; 7, s. 471-478
-
Konferensbidrag (refereegranskat)abstract
- The fluidization regime of the bottom bed has been investigated in a circulating fluidized bed at ambient temperature. A few measurements have also been made in a 12 MWth CFB boiler at normal operation temperature. It was found that the bottom bed was of a bubbling type for all conditions studied.
|
|
