The impact of secondary air boundary conditions on CFD results in small-scale wood pellet combustion
This work is aimed at determining the impact of Secondary Air (SA) boundary conditions on CFD combustion simulation results in a small-scale wood pellet boiler.
Zadravec, T., Rajh, B., Kokalj, F., Samec, N.,
The impact of secondary air boundary conditions on CFD results in small-scale wood pellet combustion, 2022. [Link]
Influence of air staging strategies on flue gas sensible heat losses and gaseous emissions of a wood pellet boiler: An experimental study
In this work, the aim is to (1) Discover a combination of the most suitable process parameters based on a multi-criteria decision-making method and (2) To unveil relevant correlations between the two process parameters under study (PA/SA ratio and excess air), emissions and combustion temperatures.
Zadravec T., Rajh B., Kokalj F., Samec N.
Influence of air staging strategies on flue gas sensible heat losses and gaseous emissions of a wood pellet boiler: An experimental study
Renew Energy, 178 (2021), pp. 532-548 [Link]
CFD modelling of air staged combustion in a wood pellet boiler using the coupled modelling approach
A previously developed and validated Computational Fluid Dynamics combustion simulation methodology for large-scale waste to energy grate-fired boilers is modified and implemented for the case of a commercial 32 kW wood pellet hot water boiler. An experimental investigation is performed in order to determine process parameters used in the fuel conversion modelling, case setup and, finally, to enable the validation of the numerical modelling approach.
Zadravec T., Rajh B., Kokalj F., Samec N.
CFD modelling of air staged combustion in a wood pellet boiler using the coupled modelling approach
Thermal Science and Engineering Progress (Volume 20), 1 December 2020, 100715 [Link]
The impacts of different profiles of the grate inlet conditions on freeboard CFD in a waste wood-fired grate boiler
This paper investigates how different fuel bed models or grate inlet profiles will affect the Computational Fluid Dynamics simulation of combustion in the freeboard in industrial grate boilers.
Zadravec T., Chungen Y., Kokalj F., Samec N., Rajh B.
The impacts of different profiles of the grate inlet conditions on freeboard CFD in a waste wood-fired grate boiler
Applied Energy (Volume 268), 15 June 2020, 115055 [Link]
Small wood pellet boiler 3-D CFD study for improved flue gas emissions employing flue gas recirculation and air staging
This study explores the application of these measures in a 32 kW wood pellet boiler, combining numerical modeling and experimental testing to optimize combustion parameters. By adding 30% recirculated flue gas to the secondary air, CO emissions were reduced by 63% and NO emissions by 22%. These findings offer valuable insights for innovative small-scale boiler design and emission optimization.
Kokalj F., Zadravec T., Jovovic A.M., Samec N.
Small wood pellet boiler 3-D CFD study for improved flue gas emissions employing flue gas recirculation and air staging
THERMAL SCIENCE: Year 2023, Vol. 27, No. 1A, pp. 89-101 [Link]