Patents by Inventor Raimund Witte
Raimund Witte has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8191256Abstract: Method for producing a heat exchanger with the following steps: a) hot dip refining a steel sheet to form a corrosion-protection layer (3), wherein the corrosion-protection layer (3) contains zinc and between 0.5% and 60% aluminum; b) removal of the corrosion-protection layer (3) from one side of the steel sheet; c) production of a heat exchanger tube (2) from this steel sheet, wherein the corrosion-protection layer (3) is arranged on the outside; d) provision of ribs (6) of aluminum or an aluminum alloy; e) provision of a flux; f) provision of a filler material (8) containing aluminum and silicon in the connecting region between the ribs (6) and the outside of the heat exchanger tube (2); g) connection of the heat exchanger tube (2) to the ribs (6) in a brazing operation.Type: GrantFiled: June 26, 2007Date of Patent: June 5, 2012Assignee: GEA Energietechnik GmbHInventors: Martin Carl, Michael Herbermann, Eckhard Volkmer, Raimund Witte
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Publication number: 20110308764Abstract: An air-cooled condenser system (1) comprises a platform (2) carrying heat exchanger elements (4), steam distribution lines (6), and fans (5). The platform (2) is arranged on pillars (3), which previously are introduced into the soil beneath the platform. The platform (2) is mounted close to the ground, wherein the intake chamber (21) required beneath the platform (2) is formed by removing soil beneath the platform (2). In this way, the platform (2) can be mounted at low height and with little effort.Type: ApplicationFiled: February 12, 2010Publication date: December 22, 2011Applicant: GEA Energietechnik GmbHInventor: Raimund Witte
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Publication number: 20100132362Abstract: A condensation method is described according to which exhaust steam from a turbine (1) of a condensation power plant is supplied to an air-cooled condenser (3) for condensation. The condensate (K) obtained in the condenser (3) is preheated in a condensate heating stage (6) prior to its supply to an evaporator upstream of the turbine (1) by means of a feed pump. The condensate (K) is heated by a partial steam flow (T) of the turbine (1). A degasifier (8) is mounted in parallel to the condensate heating stage (6) for degasifying the makeup feed water (W).Type: ApplicationFiled: June 27, 2006Publication date: June 3, 2010Applicant: GEA Energietechnik GmbHInventors: Michael Herbermann, Raimund Witte, Heinz Wienen, Andras Mikovics
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Publication number: 20090307907Abstract: Method for producing a heat exchanger with the following steps: a) hot dip refining a steel sheet to form a corrosion-protection layer (3), wherein the corrosion-protection layer (3) contains zinc and between 0.5% and 60% aluminum; b) removal of the corrosion-protection layer (3) from one side of the steel sheet; c) production of a heat exchanger tube (2) from this steel sheet, wherein the corrosion-protection layer (3) is arranged on the outside; d) provision of ribs (6) of aluminum or an aluminum alloy; e) provision of a flux; f) provision of a filler material (8) containing aluminum and silicon in the connecting region between the ribs (6) and the outside of the heat exchanger tube (2); g) connection of the heat exchanger tube (2) to the ribs (6) in a brazing operation.Type: ApplicationFiled: June 26, 2007Publication date: December 17, 2009Applicant: GEA Energietechnik GmbHInventors: Martin Carl, Michael Herbermann, Eckhard Volkmer, Raimund Witte
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Patent number: 6848609Abstract: In a method of making finned tubes as components of air-cooled systems or condensers, a sheet metal strip of aluminum is first shaped into a waved finned structure with plural fins in parallel relationship and arched ends for connecting the fins, thereby defining crests on opposite ends of the finned structure. A fluxing agent of cesium-aluminum tetrafluoride is applied in lines onto the crests on at least one of the ends of the finned structure. The finned structure is then placed upon a broad side of a flat steel tube coated with a zinc/aluminum alloy. The finned structure and the flat tube are subsequently joined in a brazing furnace in the presence of an inert gas at a temperature between 370° C. and 470° C. to produce a unitary structure which is then allowed to cool down at room temperature.Type: GrantFiled: December 16, 2003Date of Patent: February 1, 2005Assignee: GEA Energietechnik GmbHInventors: Benedict Korischem, Horia Dinulescu, Raimund Witte, Eckard Volkmer
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Publication number: 20040149811Abstract: In a method of making finned tubes as components of air-cooled systems or condensers, a sheet metal strip of aluminum is first shaped into a waved finned structure with plural fins in parallel relationship and arched ends for connecting the fins, thereby defining crests on opposite ends of the finned structure. A fluxing agent of cesium-aluminum tetrafluoride is applied in lines onto the crests on at least one of the ends of the finned structure. The finned structure is then placed upon a broad side of a flat steel tube coated with a zinc/aluminum alloy. The finned structure and the flat tube are subsequently joined in a brazing furnace in the presence of an inert gas at a temperature between 370° C. and 470° C. to produce a unitary structure which is then allowed to cool down at room temperature.Type: ApplicationFiled: December 16, 2003Publication date: August 5, 2004Applicant: GEA ENERGIETECHNIK GMBHInventors: Benedict Korischem, Horia Dinulescu, Raimund Witte, Eckard Volkmer
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Patent number: 6715667Abstract: In a method for joining a steel tube with an aluminum rib, a zinc-aluminum alloy layer, having an aluminum content of 0.5% by wt. to 20% by wt., is applied to the surface of the steel tube or the aluminum rib, and then a fluxing agent in the form of cesium-aluminum tetrafluoride is applied between the steel tube and the aluminum rib at room temperature before or during the mechanical contact of the aluminum rib with the steel tube. The steel tube provided with the aluminum rib is then heated to a soldering temperature of between 370° C. and 470° C. and subjected to room temperature to cool down.Type: GrantFiled: July 22, 2002Date of Patent: April 6, 2004Assignee: GEA Energietechnik GmbHInventors: Benedict Korischem, Horia Dinulescu, Raimund Witte, Eckard Volkmer
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Publication number: 20030019915Abstract: In a method for joining a steel tube with an aluminum rib, a zinc-aluminum alloy layer, having an aluminum content of 0.5% by wt. to 20% by wt., is applied to the surface of the steel tube or the aluminum rib, and then a fluxing agent in the form of cesium-aluminum tetrafluoride is applied between the steel tube and the aluminum rib at room temperature before or during the mechanical contact of the aluminum rib with the steel tube. The steel tube provided with the aluminum rib is then heated to a soldering temperature of between 370° C. and 470° C. and subjected to room temperature to cool down.Type: ApplicationFiled: July 22, 2002Publication date: January 30, 2003Applicant: GEA ENERGIETECHNIK GMBHInventors: Benedict Korischem, Horia Dinulescu, Raimund Witte, Eckard Volkmer
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Patent number: 5896918Abstract: A heat exchanger tube for condensing steam with the use of cooling air includes an upper steam supply and a lower condensate discharge. The heat exchanger tube has an elongated cross-section in the flow direction of the transversely flowing cooling air. The interior of the tube is divided by a separating wall extending transversely of the flow direction of the cooling air into a condenser stretch whose cross-section becomes smaller in the flow direction of the steam and a dephlegmator stretch whose cross-section becomes smaller in the flow direction of the steam, wherein the condenser stretch is at the lower end thereof connected to the dephlegmator stretch for conducting steam from the condenser stretch to the dephlegmator stretch, and wherein a gas/steam mixture exhauster is mounted at the upper end of the dephlagmator stretch.Type: GrantFiled: January 16, 1998Date of Patent: April 27, 1999Assignee: GEA Energietechnik GmbHInventor: Raimund Witte