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- In relation to this article, we declare that there is no conflict of interest.
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Received July 29, 2023
Accepted October 19, 2023
- This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Effects of Excess Air and Energy Fraction on Heat Transfer for Co-fi ring of Eucalyptus Bark and Peanut Shell Blended Fuel in a Twin-Cyclonic Swirling Fluidized-Bed Combustor
Abstract
Biomass plays an important role in mitigating greenhouse gas (GHG) emissions. However, the major problem in using biomass
is that inconsistent amounts are available throughout the year. The use of mixed fuels is one way to solve this problem.
Based on the lumped system analysis method, this experimental study investigated the eff ects of excess air ( EA ) and energy
fraction on the heat transfer coeffi cients of co-fi ring eucalyptus bark and peanut shell in a twin-cyclonic swirling fl uidizedbed
combustor. The blended fuel was fi red at a fi xed heat rate for various energy fractions of secondary fuel ( EF 2 ) and EA .
The radial and axial heat transfer coeffi cients were observed: the average heat transfer coeffi cient of each operating condition
showed signifi cant eff ects for EA , while the eff ect for EF 2 was not obvious. The heat transfer coeffi cient could be improved
by up to 11% in the bed region and by as much as 22% in the freeboard area when EA was increased from 40–80%.
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