TY - JOUR
T1 - Transient CFD simulation of wood log combustion in stoves
AU - Scharler, Robert
AU - Gruber, Thomas
AU - Ehrenhöfer, Armin
AU - Kelz, Joachim
AU - Bardar, Ramin Mehrabian
AU - Bauer, Thomas
AU - Hochenauer, Christoph
AU - Anca-Couce, Andrés
PY - 2020/1/1
Y1 - 2020/1/1
N2 - Wood log stoves are a common residential heating technology that produce comparably high pollutant emissions. Within this work, a detailed CFD model for transient wood log combustion in stoves was developed, as a basis for its optimization. A single particle conversion model previously developed by the authors for the combustion of thermally thick biomass particles, i.e. wood logs, was linked with CFD models for flow and turbulence, heat transfer and gas combustion. The sub-models were selected based on a sensitivity analysis and combined into an overall stove model, which was then validated by simulations of experiments with a typical wood log stove, including emission measurements. The comparison with experimental results shows a good accuracy regarding flue gas temperature as well as CO2 and O2 flue gas concentrations. Moreover, the characteristic behavior of CO emissions could be described, with higher emissions during the ignition and burnout phases. A reasonable accuracy is obtained for CO emissions except for the ignition phase, which can be attributed to model simplifications and the stochastic nature of stove operation. Concluding, the CFD model allows a transient simulation of a stove batch for the first time and hence, is a valuable tool for process optimization.
AB - Wood log stoves are a common residential heating technology that produce comparably high pollutant emissions. Within this work, a detailed CFD model for transient wood log combustion in stoves was developed, as a basis for its optimization. A single particle conversion model previously developed by the authors for the combustion of thermally thick biomass particles, i.e. wood logs, was linked with CFD models for flow and turbulence, heat transfer and gas combustion. The sub-models were selected based on a sensitivity analysis and combined into an overall stove model, which was then validated by simulations of experiments with a typical wood log stove, including emission measurements. The comparison with experimental results shows a good accuracy regarding flue gas temperature as well as CO2 and O2 flue gas concentrations. Moreover, the characteristic behavior of CO emissions could be described, with higher emissions during the ignition and burnout phases. A reasonable accuracy is obtained for CO emissions except for the ignition phase, which can be attributed to model simplifications and the stochastic nature of stove operation. Concluding, the CFD model allows a transient simulation of a stove batch for the first time and hence, is a valuable tool for process optimization.
KW - CFD simulation
KW - Combustion
KW - Experimental validation
KW - Stove
KW - Transient model
KW - Wood log
UR - http://www.scopus.com/inward/record.url?scp=85067631018&partnerID=8YFLogxK
U2 - 10.1016/j.renene.2019.06.053
DO - 10.1016/j.renene.2019.06.053
M3 - Article
AN - SCOPUS:85067631018
SN - 0960-1481
VL - 145
SP - 651
EP - 662
JO - Renewable Energy
JF - Renewable Energy
ER -