Modeling the performance of the whole tree energy combustor
- Univ. of Wisconsin, Madison, WI (United States)
A computational model has been developed for the deep, fixed bed whole-tree combustor gasifier which includes drying, pyrolysis, heat and mass transfer, char and volatile reactions. The lowest portion of the fuel bed is an oxidizing region and remainder of the fuel bed acts as a gasification and drying region. Heat release rates, temperature profiles, CO, CO{sub 2}, H{sub 2}O, hydrocarbon, and O{sub 2} profiles, and solid and gas velocity profiles are calculated as a function of the fuel properties and air inputs. Model results are compared to pilot scale tests of the whole-tree combustion/gasifier. The affect of operating parameters such as underfire air flow (3-12 ft/s), fuel moisture content (15-45%), and fuel bed height (8-16 ft) on the fuel feed rate, heat rate, heat release rate, temperature and velocity profiles, and. overfire air requirements is presented and discussed. Heat release rates range from 1 x 10{sup 6} to 4.5 x 10{sup 6} Btu/hr-ft{sup 2} depending on the conditions.
- OSTI ID:
- 214714
- Report Number(s):
- CONF-950801-; TRN: 96:000922-0185
- Resource Relation:
- Conference: 210. national meeting of the American Chemical Society (ACS), Chicago, IL (United States), 20-25 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of 210th ACS national meeting. Part 1 and 2; PB: 1866 p.
- Country of Publication:
- United States
- Language:
- English
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