Institute of Chemical Engineering page 1Achema 2012

Thermal Process Engineering

Martin Miltner,Christian Kuttner,

Ass.Prof. Michael Harasek

mharasek@mail.zserv.tuwien.ac.at

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+

M

M

M

M

M

M

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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