Robert Boschgmbh

Pierburg Gmbh

Viessmann Werke Gmbh & Co

Umicore Ag & Co Kg

Viessmann Werke Gmbh Co. Kg

Viesmann Werke Gmbh & Co.

Klaus Heikrodt

Peter Hofbauer

Hans Baumgartner

Bernd Thomas

Stefan Wieland

Frank Baumann

Ulrich Henke

Manfred Brandstadter

Herbert Schneider

Werner Seifert

Peter Britz

Rolf-Peter Strauss

The invention provides a combined heat and power plant with an integrated gas production system. The combined heat and power plant contains a steam reformer heated with a gas burner which converts a mixture of hydrocarbons and water vapour into a reformate gas stream containing hydrogen and carbon monoxide. The plant further contains a reactor system with several stages for removing carbon monoxide from the reformate gas stream. The plant also contains a heat exchanger for removing heat energy from the reformate gas stream and a fuel cell unit for producing electrical energy by catalytic reaction of the hydrogen contained in the reformate gas with oxygen in the fuel cell, wherein the reformate gas stream is supplied to the anode in the fuel cell unit and the anode waste gas is taken to the gas burner of the steam reformer as fuel, via a gas pipe. The reactor system for removing carbon monoxide from the reformate gas stream contains, according to one embodiment of the invention, a low temperature shift reactor and a downstream methanisation reactor and the heat exchanger for cooling the reformate gas stream leaving the steam reformer to the inlet temperature of the low temperature shift reactor is located in the reformate gas stream between the steam reformer and the low temperature shift reactor. This combined heat and power plant is operated according to the invention in such a way that the reformate gas contains 5 to 10 vol. % of unreformed hydrocarbon which enables the flame in the gas burner to be monitored using an ionisation detector when burning the anode waste gas in the gas burner of the steam reformer.

Combined heat and power plant and a process for the operation thereof

Heat and cold-generating machine

Method for utilizing waste-gas heat from heat-generating and

Heating and cooling machine

Heat exchanger

A device for controlling a rotating-piston machine in which inner and outer rotors rotate at unequal speeds and profiled teeth thereon form gaps to define working chambers which move, with change of volume, from an inlet region to an outlet region of the machine. The device comprises a body having a feed channel for a working fluid, a plurality of supply channels which open into the inlet region and two rotary slide valves for controlling communication between the feed channel and the supply channels to fill the working chambers during development of suction therein upon rotation of the rotors. The body has two round cutouts each containing a respective rotary slide valve. One slide valve controls supply of fluid at the beginning of development of suction in each working chamber whereas the other slide valve controls supply fluid at the end of development of suction in each working chamber. Each cut-out is connected to the feed channel and to respective associated pluralities of supply channels.

Device for controlling fluid supply to a rotary piston machine

A rotary piston machine has inner and outer rotors rotating at unequal speeds around eccentric axes, and the rotors are provided with angularly spaced profiled teeth and gaps which cooperate during rotation to define working chambers of varying volume which move between an inlet and an outlet for a fluid medium to be pumped. The outer rotor has openings therein to provide communication between the working chambers and the inlet and outlet during rotation of the rotors, and these openings are spaced axially of the outer rotor to define a solid band of material between the openings. The solid band of material is provided with a circumferential groove in which a reinforcing belt is mounted having greater strength than the material of the outer rotor. The belt can be glass, carbon or aramide fiber would as threads and impregnated with a hardened plastic such as an epoxy resin.

Rotary piston machine having inner and outer rotors and a reinforcing

Growing community of inventors

Krefeld, Germany

Klaus Heikrodt