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

Heat Validation market potential Biomass gasification Biomass furnace

Project ID 03KB148

GVAGR-System - Staged Combustion with Exhaust Gas Recirculation and Integrated Exhaust Gas Purification for Pollutant Emissions Reduction and Efficiency In-crease in Automatically Fed Biomass Combustion Plants for the Thermal Utilization of Biogenic and Residual Fuels

GVAGR-System - Icon (source: DBFZ)


  • 01.08.2018 – 31.05.2022


Fraunhofer Institute for Building Physics (IBP)
Nobelstraße 12
70569 Stuttgart

Dr. Mohammad Aleysa – project manager
Telephone: +49 (0)711-970-3455
E-mail: mohammadshayesh.aleysa‍@‍


03KB148B - HDG Bavaria GmbH

Associated partners

Cooperation partners



Within the framework of this research project, a new boiler technology (GVAGR system) is to be developed and permanently tested under practical operating conditions. The GVAGR system is a technology for automatically charged biomass boilers based on multi-stage combustion with integrated exhaust gas recirculation. In the GVAGR system, the solid biogenic fuels will first be gasified in a gasification chamber, whereby the gasification will not take place with oxygen-rich ambient air as in conventional biomass boilers, but with an innovative exhaust gas recirculation system with oxygen-poor exhaust gas. Gasification with low-oxygen exhaust gas has the advantage that the temperatures in the glowing bed area are significantly lower than in conventional boilers and the formation of many pollutants (e.g. NOx, dioxins and furans), which can be formed at high temperatures and concentrations of oxygen in the gasification zone, is avoided.



  • Development and testing of the GVAGR system according to DIN EN 304 and DIN EN 303-5
  • Planning, conception and design work
  • Carrying out the necessary combustion tests as well as
  • the associated analyses and the evaluation of the measurement results

HDG Bavaria GmbH

  • Provision of the experimental incineration plant
  • Support of the practical tests with the prototype



  • Development and commissioning
  • Testing and optimisation of operations
  • Ecological and economic evaluation

HDG Bavaria GmbH

  • Manufacture
  • System transfer
  • Endurance testing


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