Full steam ahead for biomass project

Nuthall, Keith
December 2004
Engineer (00137758);12/10/2004, Vol. 293 Issue 7665, p14
This article reports that an European Union funded research project has created technology allowing small-scale combined heat and power plants to run on biomass fuels. The technology is based on a screw-type steam engine displacement rotary engines with a closed working chamber, similar to piston engines and is applicable to the 200-1,000 kW power range. Steam generated by a biomass-fired boiler is fed into a screw chamber containing rotors. As the steam heats and expands in size it is forced out through an exhaust outlet, the motion turning the screw-chamber rotors and driving electricity generators. The project's German and Austrian engineering companies integrated the engine into a heating plant in Hartberg, Austria and tested it for 5,000 hours.


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