Rational Grosskuechentechnik Service Gmbh

Rational Ag

Rational Gmbh

Franz Koch

Jaroslav Klouda

Gerd Gumienny

Peter Wiedemann

Roland Hegmann

Manfred Lichtenstern

Rainer Otminghaus

Rudolf Koegl

Simon Pattermann

A combustion system and a method for adapting the combustion system to utilize a first fuel when the system has been designed for a second fuel. The method and system provide inlets for adding air to lower the quality of the first fuel to the quality of the second fuel or inlets for adding a third fuel of a higher quality than the second fuel to raise the quality of the first fuel to the level of the quality of the second fuel.

Combustion system, a method of adapting the performance of the combustion system and a cooking device utilizing the combustion system

A heat exchanger for a cooking chamber extends around a ventilator fan of the cooking chamber and has a burner tube connected to one end of a first portion of the heat exchanger and has a reverse bend so a second portion extends parallel to the first portion in the opposite direction. The tube is mounted by the burner and the opposite end so that the reverse bends allows for compensation of thermal expansion in the tube during a heating process.

Heat exchanger

A heat exchanger for use with a heat source for heating a vaporized liquid includes a housing composed of at least two essentially cuboid chambers that lie opposite one another and are connected to one another by at least one inclined pipe and has an arrangement for filling the housing with a vaporized liquid to an adjustable level. Preferably, a plurality of pipes are provided, which are arranged in vertically-extending planes, with the pipes of adjacent planes sloping in opposite directions.

A hot air heat exchanger comprises a heat exchanger housing having a floor, which is essentially formed by a ceiling of an outer chamber and has at least one heat exchanger pipe extending from the floor to a ceiling element having exhaust openings, each pipe is secured to an exhaust opening in the upper wall of the outer chamber and a burner is disposed in an inner chamber which is positioned inside of the outer chamber with a spacing between the wall of the inner chamber and the outer chamber to allow air to flow therethrough. The upper wall of the inner chamber is provided with an exhaust gas opening, which is aligned with the exhaust opening of the outer chamber, and both openings have peripheral walls that are tapered to form a Venturi-like nozzle for drawing air in the space between the inner and outer chambers into each pipe as the exhaust gas from the burner in the inner chamber flows into the pipe to pass up through an exhaust element in the ceiling of the heat exchanger housing.

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Untermeitingen, Germany

Franz Koch