| Title | Dry fuel jet half-angle measurements and correlation for an entrained flow gasifier |
| |
| Author | Kus, F; Hughes, R ; Macchi, A; Mehrani, P; Duchesne, M |
| Source | Energies vol. 11, issue 8, 2018 p. 1-13, https://doi.org/10.3390/en11081967  Open Access |
| Image |  |
| Year | 2018 |
| Alt Series | Natural Resources Canada, Contribution Series 20220123 |
| Publisher | MDPI |
| Document | serial |
| Lang. | English |
| Media | paper; digital; on-line |
| File format | pdf |
| Subjects | fossil fuels; coal gasification; modelling |
| Illustrations | models; schematic diagrams; tables; figures; plots; profiles |
| Program | Clean Fossil Fuels |
| Released | 2018 07 28 |
| Abstract | Reduced order models (ROMs) are increasingly applied to entrained flow gasification development due to reduced computational requirements relative to computational fluid dynamics (CFD) models. However,
they require greater a posteriori knowledge of the reactor physics. A significant parameter influencing ROM outputs is the jet half-angle of the solid fuel and oxidant mixture in the gasifier. Thus, it is important to understand the geometry of the
jet in the gasifier, and how it is dependent on operating parameters, such as solid and carrier gas flow rates. In this work, an existing model for jet half-angles, which considers the ratio of surrounding gas density to jet core density, is extended
to a dry solids jet with impinging gas. The model is fitted to experimental jet half-angles. The jet half-angle of a non-reactive flow was measured using laser-sheet imaging for solid fluxes in the range of 460-880 kg/m2s and carrier gas fluxes in
the range of 43-90 kg/m2s at the transport line outlet. Jet half-angles ranged from 5.6° to 11.3°, increasing with lower solid/gas loading ratios. CFD simulations of two reactive conditions, with solid and gas fluxes similar to experiments, were used
to test the applicability of the proposed jet half-angle model. |
| Summary | (Plain Language Summary, not published)
Gasification is used to generate electricity and produce chemicals. State-of-the-art gasifiers work at high pressures for higher efficiency and to allow
reduction of the gasifier's volume and the associated capital costs. Although many gasifiers use fuel mixed with water to allow pressurization of the feed by pumping, the added water comes with an efficiency penalty. Pressurized pneumatic conveying
of solid fuels is desirable, but has many reliability issues. CanmetENERGY of Natural Resources Canada, in collaboration with the University of Ottawa, developed and tested a pilot-scale fuel feeding system. A significant parameter influencing
gasifier models is the jet half-angle of the solid fuel and oxidant mixture in the gasifier. Thus, it is important to understand the geometry of the jet in the gasifier, and how it is dependent on operating parameters, such as solid and carrier fluid
flow rates. In this work, the jet half-angle of a non-reactive flow was measured using laser-sheet imaging. |
| GEOSCAN ID | 330243 |
|
|