TY - JOUR
TI - Experimental and numerical study on combustion of baled biomass in cigar burners and effects of flue gas re-circulation
AU - Erić Aleksandar M
AU - Nemoda Stevan Đ
AU - Dakić Dragoljub V
AU - Repić Branislav
AU - Đurović Dejan M
JN - Thermal Science
PY - 2016
VL - 20
IS - 11
SP - 151
EP - 165
PT - Article
AB - The paper presents results of experimental and numerical investigation  addressing combustion of baled agricultural biomass in a 50 kW experimental  furnace equipped with cigar burners. Experiments performed included  measurements of all parameters deemed important for mass and energy balance,  as well as parameters defining quality of the combustion process.  Experimental results were compared with results of numerical simulations  performed with previously developed CFD model. The model takes into account  complex thermo mechanical combustion processes occurring in a porous layer of  biomass bales and the surrounding fluid. The combustion process and the  corresponding model were deemed stationary. Comparison of experimental and  numerical results obtained through research presented in this paper showed  satisfactory correspondence, leading to the conclusion that the model  developed could be used for analysis of different effects associated with  variations in process parameters and/or structural modifications in  industrial biomass facilities. Mathematical model developed was also utilized  to examine the impact of flue gas recirculation on maximum temperatures in  the combustion chamber. Gas recirculation was found to have positive effect  on the reduction of maximum temperature in the combustion chamber, as well as  on the reduction of maximum temperature zone in the chamber. The conclusions  made provided valuable inputs towards prevention of biomass ash sintering,  which occurs at higher temperatures and negatively affects biomass combustion  process. [Projekat Ministarstva nauke Republike Srbije, br. III 42011:  Development and improvement of technologies for energy efficient and  environmentally sound use of several types of agricultural and forest biomass  and possible utilization for cogeneration i br. TR33042: Fluidized bed  combustion facility improvements as a step forward in developing energy  efficient and environmentally sound waste combustion technology in fluidized  bed combustors]