Institute of Chemical Engineering page 1Achema 2012
Thermal Process Engineering
Martin Miltner,Christian Kuttner,
Ass.Prof. Michael Harasek
Energiezentrale 400+
Energiezentrale 400+Marktreife Energiezentrale ab 400 kW mit neuartiger, einfacher
Verstromung für Wohnbau, gemeinnützige und gewerbliche Objekte
Institute of Chemical Engineering page 2Achema 2012
Thermal Process Engineering
Energiezentrale 400+
The project• Funded by Austrian national grant („Haus der Zukunft“)• Duration: 24 months• Started in July 2010• Partners:
• WTI wärmetechnische Industrieanlagen GmbH• Federspiel Ökotechnology Consulting GmbH
• Based on former research projects
Institute of Chemical Engineering page 3Achema 2012
Thermal Process Engineering
Energiezentrale 400+
Key facts Development of a marketable, decentralised energy
central in the range of 400kW thermal power Capable for the combined production of electricity,
heating and cooling for residential buildings, public utility and commercial objects
Capable of utilising a broad variety of renewable fuels based on regionally available biogenous residual materials
All sorts of baled biomass without pre-processing Erecting, commissioning and operation of a 450kW
combustion pilot plant in Leiben, Austria
Institute of Chemical Engineering page 4Achema 2012
Thermal Process Engineering
Energiezentrale 400+
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hot gas1402kg/h1081m³/h(STP)4768m³/h932°C67,26v% N22,33v% O215,26v% CO214,96v% H2O
cold gas1402kg/h1081m³/h(STP)1714m³/h160°C67,26v% N22,33v% O215,26v% CO214,96v% H2O
flue gas703kg/h541m³/h(STP)859m³/h160°C67,26v% N22,33v% O215,26v% CO214,96v% H2O
fresh prim.220kg/h171m³/h(STP)183m³/h20°C
recirculation gas700kg/h539m³/h(STP)855m³/h160°C67,26v% N22,33v% O215,26v% CO214,96v% H2O
rec. prim.162kg/h125m³/h(STP)198m³/h160°C
rec. aft.78kg/h60m³/h(STP)95m³/h160°C
rec. sec.460kg/h355m³/h(STP)563m³/h160°C
fresh air593kg/h461m³/h(STP)495m³/h20°C79v% N221v% O20v% CO20v% H2O
fresh aft.59kg/h46m³/h(STP)49m³/h20°C
fresh sec.314kg/h244m³/h(STP)262m³/h20°C
ash6,7kg/h932°C
heat exchanger
369kW
primary zone
secondary zone
afterburning grate
biomass fuel117,5kg/h20°C6,2g% H2O
biomass fuel: wheat strawstoichiometric ratio = 1,15fuel input: 447kW thermal
Institute of Chemical Engineering page 5Achema 2012
Thermal Process Engineering
Energiezentrale 400+
Combustion pilot plant in Leiben, Lower Austria. 450kW thermal
power
Combustor geometry
Secondary combustion zone (air staging)
Primary combustion zone (drying, devolatilisation, gasification)
Solid combustion zone (afterburning grate)Fuel feeding
channel (biomass bales)
Institute of Chemical Engineering page 6Achema 2012
Thermal Process Engineering
Energiezentrale 400+
Detailed analysis of combustion apparatus by application of CFD (Computational Fluid Dynamics)
Gas velocity plots in secondary combustion zone Primary combustion zone
Detailed analysis of gas valves for combined volume flow measurement and control by means of CFD
Institute of Chemical Engineering page 7Achema 2012
Thermal Process Engineering
Energiezentrale 400+
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