Project meeting of STEP at the site of the company ATS - Agro Trading & Solutions in Hardegsen (Photo: DBFZ)

Biomass technologies Biomass furnace

Project ID 03KB069

FuelBand - Broadening the range of fuels in modern biomass combustion chambers

CFD simulation of the slagging in the biomass furnace (Source: EVT)


  • 01.10.2012 – 31.12.2015


Friedrich Alexander-University Erlangen-Nürnberg (FAU)
Chair of Energy Process Engineering
Fürther Straße 244f
90429 Nürnberg

Prof. Dr.-Ing. Jürgen Karl – project manager
Telephone: +49 (0)911 5302-9021

juergen.karl@fau.deThomas Plankenbühler – further contact person
Telephone: +49 (0)911 5302-9031


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Results are only available in German. 


The project "FuelBand" focuses on the prediction of slagging formation in biomass fueled boilers – main objective is to allow a broader variety of fuels in both existing and newly planned combustion chambers. Results of the project allow a better judgment of possibilities and risks when fuels with high ash content or rich in fine particles are applied.


  • Description and localization of the slagging behavior in biomass fueled boilers in a simple, yet powerful and general mode
  • Describtion of the slagging formation based on readily available fuel parameters like the proximate analysis, fine particle content and ash melting temperature as well as the combustion chamber geometry and residence time by means of CFD simulation
  • Model development and validation using a lab scale fluidized bed boiler and performing slagging experiments with a variety of fuels and fuel mixes
  • Application of CFD in collaboration with plant operators and manufacturers to further validate achieved results in four existing biomass power plants in range up to 30 MW thermal power
  • Transfer of obtained characteristic diagrams based on CFD simulations, operators’ experience and lab experiments, to a broad variety of boilers using different kinds of biomass fuels


  • CFD modeling of biomass particle combustion and cooling behavior in connection to slagging formation
  • Experimental examination of the slagging behavior of different biomass fuels
  • CFD modeling of four existing grate fired biomass power plants, tweaking and validating the slagging model


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