Daikeler, Alexander ; Ströhle, Jochen ; Epple, Bernd (2018)
Investigation of the Hydrodynamics of a 1 MWth Circulating Fluidized Bed Pilot Plant.
23rd International Conference on Fluidized Bed Conversion. Seoul, Südkorea (13.05.2018-17.05.2018)
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
A water-cooled capacitance probe measurement system has been developed in order to conduct inbed flow pattern measurements within two circulating fluidized bed (CFB) reactors of a 1 MWth pilot plant. Several processes like carbonate looping, chemical looping, gasification and fluidized bed combustion are investigated at this test rig. In this paper, profile measurements conducted during a long term carbonate looping test campaign are presented. Furthermore, extensive measurements are shown, which were conducted within a scaled cold flow model of the pilot plant. Here, four different particles had been used as bed material. These included limestone, corn grit and two different size distributed glass beads. The particles are analysed in detail, especially focusing on their suitability to scale the 1 MWth experiments. Therefore, they are compared to each other regarding their dimensionless numbers according to the Glicksman scaling laws. Finally, the flow structures for the different particle systems are compared to each other, thus enabling to determine systematic differences, which are caused due to differing characteristics of the particles. A smaller size of the small glass bead fraction lead to higher measured particle velocities with this particle system. Furthermore, the very different corn grit particles lead to very similar flow structures than the limestone and large glass bead fraction. A comparison of the hydrodynamics in the hot and cold CFB units showed the highest similarity for the small glass bead fraction, which well matches the Glicksman scaling laws. Eventually, the capacitance probe system proved to be a highly suitable instrument to investigate the flow conditions within industrial scale CFB units under real operating conditions.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Daikeler, Alexander ; Ströhle, Jochen ; Epple, Bernd |
| Art des Eintrags: | Bibliographie |
| Titel: | Investigation of the Hydrodynamics of a 1 MWth Circulating Fluidized Bed Pilot Plant |
| Sprache: | Englisch |
| Publikationsjahr: | Mai 2018 |
| Veranstaltungstitel: | 23rd International Conference on Fluidized Bed Conversion |
| Veranstaltungsort: | Seoul, Südkorea |
| Veranstaltungsdatum: | 13.05.2018-17.05.2018 |
| Kurzbeschreibung (Abstract): | A water-cooled capacitance probe measurement system has been developed in order to conduct inbed flow pattern measurements within two circulating fluidized bed (CFB) reactors of a 1 MWth pilot plant. Several processes like carbonate looping, chemical looping, gasification and fluidized bed combustion are investigated at this test rig. In this paper, profile measurements conducted during a long term carbonate looping test campaign are presented. Furthermore, extensive measurements are shown, which were conducted within a scaled cold flow model of the pilot plant. Here, four different particles had been used as bed material. These included limestone, corn grit and two different size distributed glass beads. The particles are analysed in detail, especially focusing on their suitability to scale the 1 MWth experiments. Therefore, they are compared to each other regarding their dimensionless numbers according to the Glicksman scaling laws. Finally, the flow structures for the different particle systems are compared to each other, thus enabling to determine systematic differences, which are caused due to differing characteristics of the particles. A smaller size of the small glass bead fraction lead to higher measured particle velocities with this particle system. Furthermore, the very different corn grit particles lead to very similar flow structures than the limestone and large glass bead fraction. A comparison of the hydrodynamics in the hot and cold CFB units showed the highest similarity for the small glass bead fraction, which well matches the Glicksman scaling laws. Eventually, the capacitance probe system proved to be a highly suitable instrument to investigate the flow conditions within industrial scale CFB units under real operating conditions. |
| Freie Schlagworte: | hydrodynamics of circulating fluidized bed, in-furnace measurements in 1 MWth pilot plant, scaling of fluidized beds, cold flow experiments |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Institut für Energiesysteme und Energietechnik (EST) |
| Hinterlegungsdatum: | 01 Okt 2018 13:40 |
| Letzte Änderung: | 01 Okt 2018 13:40 |
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