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Sirisomboon Kasama,Sopamart Nattawat,Srisamran Tananon 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.5
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%.