Patents by Inventor Stefan Riemann
Stefan Riemann 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: 11346245Abstract: A steam-turbine unit has a steam turbine and an option for cooling the steam turbine by forced cooling, wherein cooling air is drawn through the steam turbine via a suction device and a drainage line of the live-steam valve is used as the access option.Type: GrantFiled: January 28, 2015Date of Patent: May 31, 2022Assignee: SIEMENS ENERGY GLOBAL GMBH & CO. KGInventors: Edwin Gobrecht, Stefan Riemann, Gerta Zimmer
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Publication number: 20210285333Abstract: A method for checking a steam turbine, wherein a first operating variable and a second operating variable are determined, wherein a correlation between the first and second operating variable prevails, and a confidence band having an upper maximum value and a lower minimum value is created, wherein a notification is generated as long as the second operating variable is outside the confidence band during operation.Type: ApplicationFiled: April 20, 2018Publication date: September 16, 2021Applicant: Siemens AktiengesellschaftInventors: Henning Almstedt, Ralf Bell, Ulrich Beul, Kai Brune, Robin Burzan, Matthias Heue, Benedikt Hofmeister, Mario Koebe, Michael Löhr, Stefan Riemann, Andreas Schaarschmidt, Andreas Ulma, Sebastian Zahn, Gerta Zimmer
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Method for carrying out a sound test of atleast one component and endoscope device used for the same
Patent number: 10302527Abstract: A method is provided for carrying out a sound test for detecting and/or analyzing material faults and/or mounting faults of at least one component, in which the component is excited, by striking, to experience vibrations which generate soundwaves, after which the generated soundwaves are detected and conclusions are drawn about material faults and/or mounting faults on the basis of the detected soundwaves, wherein the striking of the component and the detection of the vibrations are carried out using an endoscope device. In addition, embodiments of the present invention relates to an endoscope device which is configured to carry out the method.Type: GrantFiled: March 3, 2017Date of Patent: May 28, 2019Assignee: Siemens AktiengesellschaftInventors: Henning Almstedt, Ralf Bell, Ulrich Beul, Kai Brune, Robin Burzan, Matthias Heue, Benedikt Hofmeister, Mario Koebe, Michael Löhr, Stefan Riemann, Andreas Schaarschmidt, Andreas Ulma, Sebastian Zahn, Gerta Zimmer -
Patent number: 9951657Abstract: A module for a thermal power plant for condensing expelled vapors and cooling turbine effluent from the drained turbine includes a first unit designed to condense expelled vapors as well as a second unit designed to cool the turbine effluent, condensate from the first unit being transferable to the second unit.Type: GrantFiled: September 18, 2014Date of Patent: April 24, 2018Assignee: Siemens AktiengesellschaftInventors: Peter Bergmann, Rachid Dhima, Svea Guntermann, Bernd Leu, Kakhi Naskidashvili, Stefan Riemann
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Publication number: 20170276432Abstract: A method for operating a condenser, wherein the condenser is designed for condensing water vapor to form water and during operation a condensate having water accumulates in the condenser, wherein on the condensate surface a plurality of floating bodies are arranged on the condensate, wherein the floating bodies float on the condensate, wherein a large number of floating bodies are used in such a way that the condensate surface is covered, wherein the floating bodies are of spherical and/or sphere-like design, and wherein floating bodies with different sizes are used.Type: ApplicationFiled: August 19, 2015Publication date: September 28, 2017Applicant: Siemens AktiengesellschaftInventors: Kai Brune, Stefan Brussk, Nigel-Philip Cox, Daniel Dreier, Tobias Gabl-Zimmek, Andrei Ghicov, Marie Hu, Mario Koebe, Marc Lange, Teresa Pott, Stefan Riemann, Andreas Ulma, David Veltmann, Gerta Zimmer
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Publication number: 20170261399Abstract: A method is provided for carrying out a sound test for detecting and/or analyzing material faults and/or mounting faults of at least one component, in which the component is excited, by striking, to experience vibrations which generate soundwaves, after which the generated soundwaves are detected and conclusions are drawn about material faults and/or mounting faults on the basis of the detected soundwaves, wherein the striking of the component and the detection of the vibrations are carried out using an endoscope device. In addition, embodiments of the present invention relates to an endoscope device which is configured to carry out the method.Type: ApplicationFiled: March 3, 2017Publication date: September 14, 2017Inventors: HENNING ALMSTEDT, RALF BELL, ULRICH BEUL, KAI BRUNE, ROBIN BURZAN, MATTHIAS HEUE, BENEDIKT HOFMEISTER, MARIO KOEBE, MICHAEL LÖHR, STEFAN RIEMANN, ANDREAS SCHAARSCHMIDT, ANDREAS ULMA, SEBASTIAN ZAHN, GERTA ZIMMER
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Publication number: 20170183977Abstract: A steam turbine system including a steam turbine which has a turbine housing and at least one turbine shaft accommodated in the turbine housing and sealed by seals, a condenser connected fluidically to the steam turbine, an evacuation unit connected fluidically to the condenser, and a dry air source which is connected fluidically to the steam turbine, wherein the steam turbine system is designed in such a way that the evacuation unit is optionally fluidically connectable to the dry air source. A method for preserving components of a steam turbine system to prevent idle-state corrosion is also provided, which the steps: shutting down a steam turbine of the steam turbine system and sucking dry air into the steam turbine using an evacuation unit which additionally functions during intended operation of the steam turbine to exhaust a resulting amount of gas into a condenser.Type: ApplicationFiled: March 31, 2015Publication date: June 29, 2017Inventors: Kai Brune, Stefan Brußk, Nigel-Philip Cox, Daniel Dreier, Tobias Gabl-Zimmek, Andrei Ghicov, Marie Hu, Mario Koebe, Marc Lange, Teresa Pott, Stefan Riemann, Andreas Ulma, David Veltmann, Gerta Zimmer
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Publication number: 20170067364Abstract: A steam-turbine unit has a steam turbine and an option for cooling the steam turbine by forced cooling, wherein cooling air is drawn through the steam turbine via a suction device and a drainage line of the live-steam valve is used as the access option.Type: ApplicationFiled: January 28, 2015Publication date: March 9, 2017Applicant: Siemens AktiengesellschaftInventors: Edwin Gobrecht, Stefan Riemann, Gerta Zimmer
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Publication number: 20160245124Abstract: A module for a thermal power plant for condensing expelled vapors and cooling turbine effluent from the drained turbine includes a first unit designed to condense expelled vapors as well as a second unit designed to cool the turbine effluent, condensate from the first unit being transferable to the second unit.Type: ApplicationFiled: September 18, 2014Publication date: August 25, 2016Applicant: Siemens AktiengesellschaftInventors: Peter Bergmann, Rachid Dhima, Svea Guntermann, Bernd Leu, Kakhi Naskidashvili, Stefan Riemann
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Patent number: 9422832Abstract: A method for controlling a cooling process of turbine components of a steam turbine shaft, wherein an air flow mixed with a water mist is used to cool the turbine components during a mist cooling phase (P4) is provided. The mist cooling phase (P4) is preceded by an air cooling phase (P3), during which an air flow is used to cool the turbine components. A constant temporal temperature gradient is specified for the cooling process, wherein the air flow density is adjusted by the valve position of a controllable regulating valve and a switch is made from the air cooling phase (P3) to the mist cooling phase (P4) if the maximum air flow density is reached and in particular if the regulating valve is fully open.Type: GrantFiled: November 7, 2012Date of Patent: August 23, 2016Assignee: SIEMENS AKTIENGESELLSCHAFTInventor: Stefan Riemann
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Publication number: 20150121871Abstract: A turbine plant (3), in particular a steam turbine plant, and a method (100) for cooling the turbine plant (3). The turbine plant (3) has a turbine (29) through which a process gas (15) flows in a flow direction (27) during operation. A cooling medium (7) is drawn or blown (120) through the turbine (29) either in or counter to the process gas flow direction (27) respectively, cooling the turbine (29). A fan (6) may be coupled to either a turbine inlet (4) or to a turbine outlet (5). The fan acts on the cooling medium (7, 110) which is drawn into the turbine (29) through the turbine inlet (4) or through the turbine outlet (5) to be blown (120) through the turbine (29) in or counter to the process gas flow direction (27).Type: ApplicationFiled: April 17, 2013Publication date: May 7, 2015Inventors: Stefan Riemann, Klaus Rothe
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Publication number: 20150047353Abstract: A method for controlling a cooling process of turbine components of a steam turbine shaft, wherein an air flow mixed with a water mist is used to cool the turbine components during a mist cooling phase (P4) is provided. The mist cooling phase (P4) is preceded by an air cooling phase (P3), during which an air flow is used to cool the turbine components. A constant temporal temperature gradient is specified for the cooling process, wherein the air flow density is adjusted by the valve position of a controllable regulating valve and a switch is made from the air cooling phase (P3) to the mist cooling phase (P4) if the maximum air flow density is reached and in particular if the regulating valve is fully open.Type: ApplicationFiled: November 7, 2012Publication date: February 19, 2015Applicant: SIEMENS AKTIENGESELLSCHAFTInventor: Stefan Riemann
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Patent number: 8857455Abstract: A method for regulating a steam bypass valve is provided. The bypass valve is arranged in a steam line and the steam line includes a device for spraying water. The equation, t Rest , 0 = FB max m . W , SOLL - m . W , IST is used to determine when to close the steam bypass valve. The steam bypass value is closed when tRest,0 is smaller than a value ?t. An actual volume of water {dot over (m)}W,IST, a desired volume of water {dot over (m)}W,SOLL and a maximum water-volume deficiency FBmax are used in the equation.Type: GrantFiled: February 15, 2011Date of Patent: October 14, 2014Assignee: Siemens AktiengesellschaftInventors: Stephan Minuth, Stefan Riemann, Klaus Rothe
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Publication number: 20120312383Abstract: A method for regulating a steam bypass valve is provided. The bypass valve is arranged in a steam line and the steam line includes a device for spraying water. The equation, t Rest , 0 = FB max m . W , SOLL - m . W , IST is used to determine when to close the steam bypass valve. The steam bypass value is closed when tRest,0 is smaller than a value ?t. An actual volume of water {dot over (m)}W,IST, a desired volume of water {dot over (m)}W,SOLL and a maximum water-volume deficiency FBmax are used in the equation.Type: ApplicationFiled: February 15, 2011Publication date: December 13, 2012Inventors: Stephan Minuth, Stefan Riemann, Klaus Rothe