Having Apparatus Cleaning, Sealing, Lubricating, Purging, Standby, Or Protecting Feature Patents (Class 60/657)
  • Patent number: 9726049
    Abstract: Disclosed is a waste heat recovery apparatus which comprises: a gas-liquid separator; an expander into which a gaseous working medium separated by the gas-liquid separator flows; a driven machine; a condenser; a first pump; a first heater; a circulation flow passage for serially connecting the gas-liquid separator, the expander, the condenser, the first pump and the first heater in this order; a heat recovery flow passage for allowing a liquid working medium discharged from the gas-liquid separator to merge with the working medium flowing in a portion between the first heater and the gas-liquid separator in the circulation flow passage; and a second pump.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: August 8, 2017
    Assignee: Kobe Steel, Ltd.
    Inventors: Akira Kishimoto, Ryo Fujisawa, Makoto Nishimura
  • Patent number: 9399925
    Abstract: A seal structure partitions a high-pressure portion and a low-pressure portion including spring-back seal rings on the high-pressure side, including ACC seal rings and fins on the low-pressure side. The ACC seal rings have an adjustable movable seal ring which is a movable seal ring that is movable in a substantially radial direction at a portion thereof and which partitions a high-pressure side steam chamber and a medium-pressure side steam chamber with the fins and a circumferential surface, and including a pressure equalizing pipe that connects the low-pressure side of the adjustable movable seal ring to a high-pressure outlet portion, is provided with an adjusting pipe that connects, on the high-pressure side steam chamber side of the ACC seal rings, a high-pressure dummy to the same high-pressure outlet portion as the medium-pressure side steam chamber, and an open/close valve in the adjusting pipe.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: July 26, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takashi Nakano, Shin Nishimoto, Hidekazu Uehara
  • Patent number: 9206707
    Abstract: The various embodiments herein provide a safety system for multiple turbine stages for saturated steam applications. The system comprises an isolating system having the inter-stage pipes for isolating the turbine stages and for transferring steam from one stage to another stage. A draining system is connected to each seal housing, inlet casing, exit casing and inter stage pipe to drain out a condensed steam vapor during a passage of steam between two successive stages. The draining system comprises drain pipes and a condensate pot for collecting and storing condensed steam. A thermodynamic trap is attached to the drain pipes and condensate pot for removing the condensed steam vapors collected in the condensate pot and drain pipes without significant steam leakage. A control system is provided for detecting and stopping high speed rotation of rotor disk in turbine assembly.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: December 8, 2015
    Inventor: Krishna Kumar Bindingnavale Ranga
  • Patent number: 9088188
    Abstract: A waste-heat recovery system for a waste-heat source, made up of an ORC (Organic-Rankine Cycle) postconnected thereto. The waste-heat source is connected with the heating device of the ORC as well as an expansion machine, coupled to a generator, for steam expansion in the ORC, which has magnetic bearings with an associated control device and a power supply via a direct current intermediate circuit of a generator frequency converter. The design and safe operating behavior of a waste-heat recovery system made up of an ORC post-connected to a waste-heat source are optimized. In a power supply failure, the electric energy that a down-running generator continues to generate is used to supply the magnetic bearings with the associated control device in order to ensure a safe operation in the event of a power supply failure.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: July 21, 2015
    Assignee: ROBERT BOSCH GMBH
    Inventors: Anayet Temelci-Andon, Konrad Herrmann, Stefan Müller, Harald Köhler
  • Patent number: 9083212
    Abstract: A turbine-generator device for use in electricity generation using heat from industrial processes, renewable energy sources and other sources. The generator may be cooled by introducing into the gap between the rotor and stator liquid that is vaporized or atomized prior to introduction, which liquid is condensed from gases exhausted from the turbine. The turbine has a universal design and so may be relatively easily modified for use in connection with generators having a rated power output in the range of 50 KW to 5 MW. Such modifications are achieved, in part, through use of a modular turbine cartridge built up of discrete rotor and stator plates sized for the desired application with turbine brush seals chosen to accommodate radial rotor movements from the supported generator. The cartridge may be installed and removed from the turbine relatively easily for maintenance or rebuilding. The rotor housing is designed to be relatively easily machined to dimensions that meet desired operating parameters.
    Type: Grant
    Filed: July 9, 2013
    Date of Patent: July 14, 2015
    Assignee: Concepts ETI, Inc.
    Inventors: Kevin Fairman, Francis A. Di Bella, David Japikse, Frederick E. Becker, Alexander Gofer
  • Patent number: 9046054
    Abstract: A heat engine with external hot source in which the engine has at least one variable volume working chamber for a working gas, and a distribution mechanism that connects this chamber to a cold input from an energy receiving path during an outgoing transfer phase and to a hot output of the energy receiving path during an incoming transfer phase, the energy receiving path being intended to heat the working gas outside the chamber on contact with the external hot source, wherein the distribution mechanism is timed in such a way as to: maintain pressure in the energy receiving path; during stable operation, connect the working chamber with the cold input from the energy receiving path whilst the pressure in the chamber is lower than the pressure in the energy receiving path.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: June 2, 2015
    Inventor: Frédéric Thevenod
  • Patent number: 9032733
    Abstract: Various embodiments of the invention include a system including: at least one computing device operably connected with a steam turbomachine and an extraction conduit fluidly connected with the steam turbomachine and a steam seal header fluidly coupled with the steam turbomachine, the at least one computing device configured to modify an output of the steam turbomachine by performing actions including: determining a pressure within the steam turbomachine; comparing the pressure within the steam turbomachine with a pressure threshold range; and instructing the extraction conduit to extract steam seal header steam from the steam seal header and provide the extracted steam seal header steam to the steam turbomachine in response to determining the pressure within the steam turbomachine deviates from the pressure threshold range.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: May 19, 2015
    Assignee: General Electric Company
    Inventors: Prakash Bavanjibhai Dalsania, Nestor Hernandez Sanchez
  • Patent number: 9027348
    Abstract: A method for retrofitting a fossil-fueled power station is provided. The power station includes a multi-housing stream turbine with a carbon dioxide separation device. As per the method, a suction capability of the steam turbine is adapted for an operation of the carbon dioxide separation device to a process steam to be removed. The carbon dioxide separation device is connected via a process steam line to an intermediate superheating line. Further, an auxiliary condenser is connected to the carbon dioxide separation device. On failure or deliberate switching off of the carbon dioxide separation device surplus process steam is condensed in the auxiliary condenser.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: May 12, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ulrich Grumann, Ulrich Much, Andreas Pickard, Mike Rost
  • Publication number: 20150121874
    Abstract: Provided is a steam turbine plant activation control device that can flexibly handle an initial state amount of a steam turbine plant and activate a steam turbine at a high speed. The activation control device 21 for the steam turbine plant includes a heat source device 1 configured to heat a low-temperature fluid using a heat source medium and generate a high-temperature fluid, a steam generator 2 for generating steam by thermal exchange with the high-temperature fluid, a steam turbine 3 to be driven by the steam, and adjusters 11, 12, 13, 14, 15 configured to adjust operation amounts of the plant.
    Type: Application
    Filed: November 3, 2014
    Publication date: May 7, 2015
    Inventors: Yasuhiro YOSHIDA, Takuya YOSHIDA, Tatsuro YASHIKI, Yukinori KATAGIRI, Eunkyeong KIM, Kenichiro NOMURA, Kazunori YAMANAKA, Fumiyuki SUZUKI, Norihiro IYANAGA
  • Publication number: 20150121871
    Abstract: 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: Application
    Filed: April 17, 2013
    Publication date: May 7, 2015
    Inventors: Stefan Riemann, Klaus Rothe
  • Publication number: 20150068207
    Abstract: In one embodiment, a steam turbine facility includes drain piping in which a shut-off valve is provided, the drain piping being either a valve drain pipe that leads a drain from the main steam regulating valve to an outside thereof, or a casing drain pipe that leads a drain from the turbine casing to an outside thereof. A heat absorber disposed in a range, upstream of the shut-off valve, of the drain piping to absorb heat of the drain piping.
    Type: Application
    Filed: September 3, 2014
    Publication date: March 12, 2015
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Daisuke ASAKURA, Koji KANBE, Tsutomu SHIOYAMA, Tomoo OOFUJI
  • Publication number: 20150033741
    Abstract: Provided are a turbine facility, in which iron oxide particle scale that adheres to inner surfaces of boiler tubes and impedes heat transfer can be efficiently removed from heater drainage water; and a water treatment method for heater drainage water in the turbine facility. The turbine facility includes a boiler 9, steam turbines 12 and 16, a condenser 1, feedwater heaters 5 and 8 which are interposed in water supply lines 4 and 6 that supply condensate condensed by the condenser 1 to the boiler 9, and in which part of steam supplied from the steam turbine 12 to a repeater is extracted as extraction steam, and the feedwater is heated using the extraction steam, and a filtration device 19 in which heater drainage water discharged from the low-pressure feedwater heater 5 is filtered and supplied to the water supply system for recovery. The filtration device 19 includes a filter having a pore size of 1 to 5 ?m.
    Type: Application
    Filed: February 19, 2013
    Publication date: February 5, 2015
    Inventors: Mamoru Iwasaki, Nobuaki Nagao, Senichi Tsubakizaki, Masaharu Takada
  • Publication number: 20140366538
    Abstract: A structure and method are provided for preventing or at least minimizing thermally-induced structural distortions, such as may occur when a steam turbine is cooling down. The steam turbine may include an inner housing and an outer housing. An intermediate space is formed between the inner housing and the outer housing, and sealing steam may be injected into the intermediate space to avoid the formation of temperature strata in the interspace and thus prevent the outer housing from bowing.
    Type: Application
    Filed: August 3, 2012
    Publication date: December 18, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Frank Deister, Ingo Forster, Daniel Gloss, Christian Musch, Heinrich Stuer, Frank Truckenmuller
  • Publication number: 20140360190
    Abstract: A drain system (10) for connection to a steam turbine (14). The drain system comprises a main drain line (20) providing a main flow path and a bypass drain line (28) providing a bypass flow path parallel to the main flow path. The main drain line and the bypass drain line are external to the steam turbine. The drain system further comprises a drain orifice assembly (22) within the main drain line, with the drain orifice assembly accessible during operation of the steam turbine. The main drain line and the bypass drain line are connected to a drain path (24) for carrying condensate and contaminants from the steam turbine.
    Type: Application
    Filed: May 22, 2014
    Publication date: December 11, 2014
    Applicant: Siemens Energy, Inc.
    Inventors: David J. Archambeault, Donald R. Leger
  • Patent number: 8893499
    Abstract: An expander-generator is disclosed having an expansion device and a generator disposed within a hermetically-sealed housing. The expansion device may be overhung and supported on or otherwise rotate a hollow expansion rotor having a thrust balance seal being arranged at least partially within a chamber defined in the expansion rotor. Partially-expanded working fluid is extracted from an intermediate expansion stage and a first portion of the extracted working fluid is used cool the generator and accompanying radial bearings. A second portion of the extracted working fluid may be introduced into the chamber defined within the expander rotor via a conduit defined in the thrust balance seal chamber. The second portion of extracted working fluid minimizes unequal axial thrust loads on the expander rotor due to the overhung arrangement.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: November 25, 2014
    Assignee: Dresser-Rand Company
    Inventor: William C. Maier
  • Patent number: 8850817
    Abstract: The invention relates to a method for operating a steam turbine power plant comprising at least one steam generator that is fueled by lignite, wherein the lignite is indirectly dried in a fluidized bed dryer that is heated at least partially with steam from the water-steam circuit of the steam generator. Said method is characterized in that the flue gas from the steam generator undergoes gas scrubbing to remove CO2 and that the energy required for the gas scrubbing is at least partially extracted from the drying process in the fluidized bed. The invention additionally relates to a device for creating steam from lignite comprising a drying system for the lignite and a device to scrub CO2 from the flue gas, wherein the drying process and the CO2 gas scrubbing are thermally coupled to each other.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: October 7, 2014
    Assignee: RWE Power Aktiengesellschaft
    Inventors: Georg Berger, Peter Moser, Toni Rupprecht, Sandra Schmidt
  • Publication number: 20140290249
    Abstract: Disclosed is a steam turbine power plant adapted to start operating safely even if prediction accuracy of its startup constraints cannot be obtained. The system calculates predictive values and current values of startup constraints of a steam turbine from process variables of plant physical quantities, next calculates in parallel both a first control input variable for a heat medium flow controller based on predictive values, and a second control input variable for a main steam control valve based on the current values, and while preferentially selecting the first control input variable, if the first control input variable is not calculated, selects the second control input variable instead. After the selection of at least one of the first and second control input variables, the system outputs an appropriate command value to the heat medium flow controller and the main steam control valve according to the kind of selected control input variable.
    Type: Application
    Filed: November 12, 2013
    Publication date: October 2, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Tatsuro YASHIKI, Yasuhiro YOSHIDA, Takuya YOSHIDA, Naohiro KUSUMI, Kazunori YAMANAKA, Kenichiro NOMURA, Masaaki TOMIZAWA, Fumiyuki SUZUKI, Yuichi TAKAHASHI
  • Publication number: 20140290250
    Abstract: Disclosed is a steam turbine power plant adapted to start operating very efficiently by highly accurate look-ahead control of a plurality of its startup constraints.
    Type: Application
    Filed: November 14, 2013
    Publication date: October 2, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Yasuhiro YOSHIDA, Takuya YOSHIDA, Tatsuro YASHIKI, Kenichiro NOMURA, Kazunori YAMANAKA, Masaaki TOMIZAWA, Yuichi TAKAHASHI, Fumiyuki SUZUKI
  • Patent number: 8844289
    Abstract: A method of cooling a turbine having internal moving components to a predetermined temperature is disclosed. The method comprises taking the turbine offline. While the turbine is offline, nitrogen is flowed through the turbine until the turbine reaches the predetermined temperature while controlling the flow of nitrogen from at least one injection point to prevent damage to the moving components of the turbine by achieving uniform cooling of the internal moving components. Then the flow of nitrogen is stopped. A method and assembly for cleaning a turbine having a deposit formed on an internal surface of the turbine is also disclosed.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: September 30, 2014
    Assignee: Baker Hughes Incorporated
    Inventor: Steven J. Barber
  • Patent number: 8844288
    Abstract: A steam turbine facility is provided which is capable of appropriately sealing a gap between members made of cast material of Ni-based alloy even under the steam-temperature condition of 650° C. or higher, and which includes a first member and a second member whose base material is formed of cast material composed of at least one of Ni-based alloy, austenite steel, or high-chrome steel, form a space where the steam of 650° C. or higher flows. Between the first member and the second member, a metal gasket is provided which has a plurality of portions in line contact with the first member and the second member. On the first member and the second member, a first high-hardness layer which is harder than the base material, is provided at least in a portion where each of the first member and the second member is in line contact with the metal gasket.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: September 30, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Shin Nishimoto, Katsuhisa Hamada, Yoshinori Tanaka, Tanehiro Shinohara, Tetsuro Akamatsu
  • Patent number: 8820078
    Abstract: A once-through high pressure steam generator and reheater configured to eliminate the majority of components limiting cyclical life of fast start conventional HRSGs. Two remaining problematic components in conventional designs the final superheater and reheater tubes overheat while their headers remain colder in fast starts. In this inventive HRSG the critical components are arranged and started by a method that limits these damaging temperature differentials. At ignition when exhaust gas surges into a wet superheater steam flow starts minutes before conventional systems. This early steam flow cools the tubes while heating the headers, thereby reducing life damaging stresses. Steam temperature is controlled through the start and warms the rest of the plant earlier without attemperators with their problematic thermal stress history. Faster starts than conventional result without damaging fatigue life depletion with this low cost innovation.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: September 2, 2014
    Inventor: Thomas Edward Duffy
  • Patent number: 8813506
    Abstract: A method is provided for connecting at least one further steam generator to a first steam generator in a power plant. The power plant includes at least two steam generators and a steam turbine, in which a fluid used to drive the steam turbine is conveyed in a fluid circuit having a plurality of steam systems. The steam systems are assigned individual steam generators and are able to be separated from one another by shut-off valves. The fluid of at least the first steam generator is connected to the steam turbine. The method involves opening the shut-off valve of at least one first steam system of the at least one further steam generator before the steam of the at least one further steam generator has reached approximately the same steam parameters as the steam of the first steam generator, so that steam can flow into the further steam generator.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: August 26, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Christian Hermsdorf, Matthias Migl, Georg Peters, Erich Schmid, Michael Schöttler
  • Patent number: 8806870
    Abstract: According to one embodiment, a carbon-dioxide-recovery-type thermal power generation system includes an absorption column allows carbon dioxide contained in exhaust gas from a boiler to be absorbed in an absorption liquid, a regeneration column that discharges a carbon dioxide gas from the absorption liquid supplied from the absorption column, a reboiler that heats the absorption liquid discharged from the regeneration column and supplies steam generated, to the regeneration column, a condenser that generates condensate by cooling the steam exhausted from a turbine, a heater that heats the condensate, a water supply pump that supplies the condensate to the boiler, a line through the steam extracted from the turbine is supplied to the reboiler and the heater, and a steam flow rate adjusting unit. The steam flow rate adjusting unit maintains an amount of steam, which is extracted from the turbine through the line, to be constant.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: August 19, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Haruhiko Hirata, Hideo Kitamura, Takashi Ogawa, Yukio Ohashi
  • Patent number: 8794001
    Abstract: A power generation apparatus that suppress cavitation includes a first on/off valve provided between a steam generator and an expander in a circulating channel; a bypass channel connected between an area between the steam generator and the first on/off valve and an area between the expander and a condenser; a second on/off valve provided in the bypass channel; a third on/off valve provided between a pump and the steam generator; and a controller. When stopping the pump, the controller outputs a control signal that stops the pump, a control signal that closes the first on/off valve, a control signal that opens the second on/off valve, and a control signal that closes the third on/off valve. In the case where a predetermined condition has been met, the controller outputs a control signal that closes the second on/off valve.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: August 5, 2014
    Assignee: Kobe Steel, Ltd.
    Inventors: Noboru Tsuboi, Masayoshi Matsumura
  • Publication number: 20140190165
    Abstract: A binary power generation device is equipped with the flow path of a medium circulating through a heat exchanger, a turbine, a condenser, and a pump. A method for removing air that has intruded into the flow path of the medium includes: an air intrusion detection step of calculating, based on the pressure and temperature of a gas retaining portion communicatively connected to the flow path of the medium, a pressure threshold value obtained by adding the saturated vapor pressure of the medium and a margin value and of detecting, by comparing the pressure of a gas phase portion with the pressure threshold value, that air has intruded into the medium; a medium liquefaction step of producing a gas by pressurizing a mixed gas of the medium and air to reduce the amount of the medium in the mixed gas; and an exhaust step of exhausting the gas.
    Type: Application
    Filed: August 16, 2012
    Publication date: July 10, 2014
    Inventors: Ichiro Myogan, Hiroaki Shibata, Yoshitaka Kawahara, Isamu Osawa, Kokan Kubota
  • Patent number: 8763397
    Abstract: A solar-thermal receiver with a superheater isolation valve is disclosed. The superheater isolation valve is positioned so as to impede the transfer of steam from a steam drum or vertical separator into a superheater. The decays in temperature and pressure, within components of a solar-thermal receiver system that may occur throughout the shutdown period of a solar-thermal receiver, may be reduced or minimized.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: July 1, 2014
    Inventors: Phani K. Meduri, James E. Pacheco, Andrew Heap
  • Patent number: 8726625
    Abstract: A combined cycle power plant is provided and includes a gas turbine engine to generate power from combustion of a fuel and air mixture, a heat recovery steam generator (HRSG) disposed downstream from the gas turbine engine to receive heat energy from the gas turbine engine from which steam is produced, the HRSG including a superheating element and a drum element, and a steam turbine engine to be receptive of the steam produced in the HRSG and to generate power from the received steam, the HRSG further including a valve operably disposed to isolate the superheating element from the drum element when a risk of condensate formation in the HRSG exists.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: May 20, 2014
    Assignee: General Electric Company
    Inventors: Joel Donnell Holt, Gordon Raymond Smith
  • Publication number: 20140123647
    Abstract: A stack ring is formed by an outer ring and an inner ring and is inserted in an annular gap formed between an inlet sleeve and an inner casing. The outer periphery of the outer ring and the inner periphery of the inner ring each have a land part having a flat face and taper faces formed on upper and lower sides of the land part. A ratio of L1 to L0 is 0.3 to 0.7 where L1 is a length of the land part and L0 is a total length in the up-down direction. A ratio of S to S0 is not less than 0.95 where S is an area of the cross sectional shape of the outer ring or the inner ring and S0 is an area of a virtual rectangle BCDE and the taper faces have an inclined angle of 1° to 10°.
    Type: Application
    Filed: April 8, 2013
    Publication date: May 8, 2014
    Inventors: Tamiaki NAKAZAWA, Masaru NISHIKATSU
  • Publication number: 20140102100
    Abstract: The various embodiments herein provide a safety system for multiple turbine stages for saturated steam applications. The system comprises an isolating system having the inter-stage pipes for isolating the turbine stages and for transferring steam from one stage to another stage. A draining system is connected to each seal housing, inlet casing, exit casing and inter stage pipe to drain out a condensed steam vapor during a passage of steam between two successive stages. The draining system comprises drain pipes and a condensate pot for collecting and storing condensed steam. A thermodynamic trap is attached to the drain pipes and condensate pot for removing the condensed steam vapors collected in the condensate pot and drain pipes without significant steam leakage. A control system is provided for detecting and stopping high speed rotation of rotor disk in turbine assembly.
    Type: Application
    Filed: October 9, 2013
    Publication date: April 17, 2014
    Inventor: KRISHNA KUMAR BINDINGNAVALE RANGA
  • Publication number: 20140102103
    Abstract: A gas compressor includes a compressor unit having a compressor body for compressing gas and an electricity-generation device generating electricity by obtaining a driving force by vaporizing a working fluid utilizing exhaust heat generated by a compressing action in the compressor body and expanding the working fluid so as to utilize the power generated by the electricity-generation device as a power source, and includes a switch device switching between power from the electricity generation device and power from a commercial power supply to supply power to the power consumption equipment, and a control device detecting an electricity-generation amount or a value correlative to the electricity generation amount and switching between the powers by the switch device, thereby generating the power using exhaust heat as a heat source to surely drive an auxiliary machine by a simple configuration regardless of a shortage of the electricity generation amount.
    Type: Application
    Filed: August 8, 2013
    Publication date: April 17, 2014
    Applicant: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kentaro YAMAMOTO, Yuji KAMIYA, Masahiko TAKANO
  • Patent number: 8695345
    Abstract: In one embodiment, a calculation method of moisture loss in a steam turbine calculates first a wetness fraction at the inlet and outlet of each of stationary blade cascades and rotor blade cascades. Subsequently, the moisture loss is classified into (1) supersaturation loss, (2) condensation loss, (3) acceleration loss, (4) braking loss, (5) capture loss and (6) pumping loss, and a loss for calculation of the moisture loss is selected from the above losses (1) to (6) according to the wetness fraction of steam at the inlet and outlet of each blade cascade. An amount of each selected loss is calculated, and an amount of moisture loss at each blade cascade is calculated.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: April 15, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroyuki Kawagishi, Akihiro Onoda, Tomohiro Tejima, Tomohiko Tsukuda, Asako Inomata, Naoki Shibukawa
  • Patent number: 8695342
    Abstract: A turbine for converting thermal energy into mechanical work. The turbine includes a heating system, wherein the heating system is adapted for heating the turbine in a power off state and/or a start-up phase of the turbine. The heating system may include an electrical heating device and/or a steam heating device.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: April 15, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Mikael Fredriksson, Torbjörn Johansson, Tommy Larsson, Oskar Mazur
  • Publication number: 20140075941
    Abstract: Provided is a power generating apparatus capable of using power generated by a heat engine in combination with power of a driving source provided separately from the heat engine. In order to prevent a problem caused when activating and stopping the apparatus, the apparatus of the present invention includes a rotary machine driving source which generates a rotational driving force for a rotary machine and a heat engine which drives the rotary machine in cooperation with the rotary machine driving source, wherein the heat engine includes an expander which expands an evaporated working medium so as to generate a rotational driving force, the expander is provided with a bypass pipe which causes a working medium inlet of the expander to communicate with a working medium outlet thereof, and the bypass pipe is provided with an on-off valve which opens and closes the bypass pipe.
    Type: Application
    Filed: July 29, 2013
    Publication date: March 20, 2014
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Shigeto Adachi, Masayoshi Matsumura, Yutaka Narukawa
  • Patent number: 8671686
    Abstract: Backup energy systems utilizing compressed air storage (CAS) systems and bridging energy systems to supply backup power to a load are provided. During a power failure, the bridging energy system provides backup power to the load at least until the CAS system begins supplying adequate power. In various embodiments, backup power capability is enhanced through the use of one or more exhaustless heaters, which are used to heat compressed air. The compressed air, in turn, drives a turbine which is used to power an electrical generator. In various embodiments, ambient air heat exchangers or other types of heat exchangers are used to heat compressed air prior to the compressed air being routed to the turbine, thereby increasing system efficiency. Backup power and backup HVAC are also provided by utilizing turbine exhaust, heat exchangers and various resistive heating elements.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: March 18, 2014
    Assignee: Active Power, Inc.
    Inventors: Joseph F. Pinkerton, David Beatty, David E. Perkins
  • Patent number: 8656718
    Abstract: In a steam system having a turbine driven by steam supplied from a high-pressure header to a low-pressure header, when the pressure in the low-pressure header drops, a turbine bypass valve is opened and the high-pressure side steam is supplied to the low-pressure side header in a normal control. When the turbine is tripped, steam is rapidly flow into the low-pressure side header and its pressure temporally increases. the steam in the low-pressure header is discharged through a discharge valve. After that, if a steam supply from the low-pressure header to another process increases, the discharge valve is closed. After the discharge valve is fully closed, an after-trip control is performed in which the opening of the turbine bypass valve is increased at an earlier timing than the normal control for preventing the steam amount in the low-pressure header to be too small. The control stability of the steam system when the turbine is tripped can be enhanced.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: February 25, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kazuko Takeshita, Susumu Kouno, Haruaki Hirayama, Naohiko Ishibashi, Yosuke Nakagawa
  • Patent number: 8650873
    Abstract: A water recirculation system for a steam power plant includes a tapoff line which receives water from a downcomer, and an economizer link which receives water from the tapoff line and transports the water to an economizer.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: February 18, 2014
    Assignee: ALSTOM Technology Ltd
    Inventor: Danny E. Gelbar
  • Patent number: 8650878
    Abstract: A turbine system includes a valve coupled to a leak off line from a leak packing of a first turbine, the valve controlling a first steam flow used to maintain a constant self-sustaining sealing pressure to a second turbine across numerous loading conditions. A related method is also provided.
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: February 18, 2014
    Assignee: General Electric Company
    Inventors: Mahendra Singh Mehra, Nestor Hernandez Sanchez, Jegadeesan Maruthamuthu, Rajasekar Natarajan, Manikandan Srinivasan
  • Publication number: 20140001762
    Abstract: A waste-heat recovery system for a waste-heat source, made up of an ORC (Organic-Rankine Cycle) postconnected thereto. The waste-heat source is connected with the heating device of the ORC as well as an expansion machine, coupled to a generator, for steam expansion in the ORC, which has magnetic bearings with an associated control device and a power supply via a direct current intermediate circuit of a generator frequency converter. The design and safe operating behavior of a waste-heat recovery system made up of an ORC post-connected to a waste-heat source are optimized. In a power supply failure, the electric energy that a down-running generator continues to generate is used to supply the magnetic bearings with the associated control device in order to ensure a safe operation in the event of a power supply failure.
    Type: Application
    Filed: December 21, 2011
    Publication date: January 2, 2014
    Inventors: Anayet Temelci-Andon, Konrad Herrmann, Stefan Müller, Harald Köhiller
  • Patent number: 8616001
    Abstract: Various thermodynamic power-generating cycles are disclosed. A turbopump arranged in the cycles is started and ramped-up using a starter pump arranged in parallel with the main pump of the turbopump. Once the turbopump is able to self-sustain, a series of valves may be manipulated to deactivate the starter pump and direct additional working fluid to a power turbine for generating electrical power.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: December 31, 2013
    Assignee: Echogen Power Systems, LLC
    Inventors: Timothy James Held, Michael Louis Vermeersch, Tao Xie
  • Patent number: 8620483
    Abstract: A steam system control method applied to a steam system including: a low-pressure header storing low-pressure steam; a high-pressure header storing high-pressure header; a steam turbine connected between them; and a turbine bypass line introducing controlled amount of steam from the high-pressure header to the low-pressure header by bypassing the steam turbine. The low-pressure header has a blow-off valve for discharging excessive steam to the outside. The steam system control method includes: a normal time blow-off valve control step of PI controlling the opening of the blow-off valve; and a trip time blow-off control step of controlling the opening of the blow-off valve by changing the MV value to a predetermined trip time opening set value when the turbine is tripped.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: December 31, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kazuko Takeshita, Susumu Kouno, Haruaki Hirayama, Naohiko Ishibashi, Yosuke Nakagawa
  • Patent number: 8567175
    Abstract: A system configured to decrease the emissions of a power plant system during transient state operation is disclosed. In one embodiment, a system includes: at least one computing device adapted to adjust a temperature of an operational steam in a power generation system by performing actions comprising: obtaining operational data about components of a steam turbine in the power generation system, the operational data including at least one of: a temperature of the components and a set of current ambient conditions at the power generation system; determining an allowable operational steam temperature range for the steam turbine based upon the operational data; generating emissions predictions for a set of temperatures within the allowable steam temperature range; and adjusting the temperature of the operational steam based upon the emissions predictions.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: October 29, 2013
    Assignee: General Electric Company
    Inventors: Gordon Raymond Smith, Kelvin Rafael Estrada
  • Patent number: 8506676
    Abstract: A waste heat recovery system is provided. The waste heat recovery system includes a gas separation apparatus that includes a chamber and at least one membrane positioned within the chamber. The gas separation apparatus is configured to produce a retentate that includes at least a combustible gas and a permeate that includes at least a waste gas, wherein the waste gas includes at least a noncombustible gas. Moreover, the waste heat recovery system includes a burner that is coupled to the gas separation apparatus, wherein the burner is configured to receive the permeate and to combust the permeate such that heat is generated from the permeate. Further, a heat recovery steam generator is coupled to the burner and configured to recover heat generated by the burner.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: August 13, 2013
    Assignee: General Electric Company
    Inventor: Robert Warren Taylor
  • Publication number: 20130182814
    Abstract: In a plant including a system which is provided with a steam generator 2, a turbine 3, 5, a condenser 6 and a heater 7 and in which non-deaerated water circulates, and a pipe, the steam generator 2, the heater 7 and 8 of the system which comes into contact with the non-deaerated water is deposited with a protective substance.
    Type: Application
    Filed: July 26, 2011
    Publication date: July 18, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masato Okamura, Osamu Shibasaki, Seiji Yamamoto, Hajime Hirasawa
  • Publication number: 20130160450
    Abstract: An Organic Rankine Cycle (ORC) system includes a rotor volume at sub-atmospheric pressure, a working fluid sprayed into the rotor volume.
    Type: Application
    Filed: December 22, 2011
    Publication date: June 27, 2013
    Inventors: Frederick J. Cogswell, Bruce P. Biederman
  • Patent number: 8468828
    Abstract: The invention relates to a working fluid for a steam circuit process carried out in a device comprising a steam generator, an expander, a condenser, and a reservoir for the working fluid, comprising a working medium that evaporates by the addition of heat in a steam generator, performs mechanical work by expanding in the expander during the steam phase, and condenses in the condenser; an ionic fluid serving as an antifreeze component and having a melting point in the reservoir below the freezing point of the working medium, wherein the decomposition temperature of the ionic fluid is above the evaporating temperature of the working medium in the steam generator.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: June 25, 2013
    Assignee: Voith Patent GmbH
    Inventors: Christian Bausch, Jens Grieser, Jurgen Berger
  • Patent number: 8464534
    Abstract: A nitrogen pressure-based engine device featuring a main engine chamber with a turbine blade system; a liquid nitrogen storage tank; a heater/vaporizer chamber for converting liquid nitrogen to gas nitrogen fluidly connected to the storage tank and to the nozzle block of the main engine chamber; a pressure condenser for condensing gas nitrogen to liquid nitrogen fluidly connected to the main engine chamber and to the storage tank; wherein liquid nitrogen flows from the storage tank to heater/vaporizer chamber then gas nitrogen flows to the main engine chamber via the nozzle block, the gas nitrogen drives rotation of the turbine blade system, the gas nitrogen then flows to the pressure condenser to be condensed to liquid nitrogen, the liquid nitrogen then flows from the pressure condenser to the storage tank.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: June 18, 2013
    Inventor: Gary D. Riemer
  • Patent number: 8453452
    Abstract: A method for improvement of a fossil fuel energy conversion into electrical energy for the simple sub- and supercritical steam cycle is proposed through introduction of additional regenerative cycle duties to improve the evaporation rate per unit of fuel burned, thus minimizing condenser heat loss of the working media. The additional duties provide a supplemental energy credit in the form of heat input to a steam generator where a modified combustion process is realized to convert fossil fuel into carbon monoxide and hydrogen at atmospheric pressure and thus achieving an essential reduction of nitrogen oxides (NOx) formation. The additional duties also involve a direct contact heat transfer to recover latent and thermal energy, contained in the discharged combustion products to provide yet another energy credit that satisfies both conventional and/or added regenerative cycle duties.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: June 4, 2013
    Assignee: Veritask Energy Systems, Inc.
    Inventor: Aleksandr Kravets
  • Patent number: 8448437
    Abstract: A method of cooling a turbine having internal moving components to a predetermined temperature is disclosed. The method comprises taking the turbine offline. While the turbine is offline, nitrogen is flowed through the turbine until the turbine reaches the predetermined temperature while controlling the flow of nitrogen from at least one injection point to prevent damage to the moving components of the turbine by achieving uniform cooling of the internal moving components. Then the flow of nitrogen is stopped. A method and assembly for cleaning a turbine having a deposit formed on an internal surface of the turbine is also disclosed.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: May 28, 2013
    Assignee: Baker Hughes Incorporated
    Inventor: Steven J. Barber
  • Patent number: 8387388
    Abstract: The invention relates to a method for increasing the steam mass flow of a high-pressure steam turbine of a steam power plant, particularly a steam power plant including reheating, during a start-up phase of the steam power plant, particularly also during an idle period of the steam power plant, wherein at least one electric consumer is connected upstream of a generator of the steam power plant before synchronization with a power supply grid. The invention further relates to a steam power plant, comprising a generator, a high-pressure steam turbine, and at least one electric consumer, which can also be connected during a start-up phase of the steam power plant, particularly also during an idle period of the steam power plant, in order to increase a steam mass flow of the high-pressure steam turbine before a synchronization process of the generator with a power supply grid.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: March 5, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Glos, Matthias Heue, Ernst-Wilhelm Pfitzinger, Norbert Pieper
  • Patent number: RE46316
    Abstract: A waste heat recovery system includes a high pressure turbine and a low pressure turbine, in which the high pressure turbine receives high pressure working fluid vapor, the low pressure turbine receives low pressure working fluid vapor and the high pressure turbine also supplies low pressure working fluid vapor to the low pressure turbine. A recuperator receives working fluid vapor from the low pressure turbine. The recuperator produces heated condensate, at least a portion of which is provided to a high pressure vaporizer. The high pressure vaporizer is configured to receive from a high temperature heat source and produces high pressure working vapor used to power the high pressure turbine. The remaining condensed fluid is provided to a low pressure vaporizer which is configured to receive heat from a low-temperature heat source, thereby producing low pressure working fluid vapor used to power the low pressure turbine.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: February 21, 2017
    Assignee: ORMAT TECHNOLOGIES, INC.
    Inventors: Uri Kaplan, Josef Sinai, Lucien Bronicki