Abstract: A refurbishing method, refurbishing apparatus and refurbished article are provided. The refurbishing method includes accessing a plurality of rotatable components attached to a turbine assembly, the turbine assembly being a portion of a turbomachine, providing a predetermined volume of a buffered electrolytic solution in an electro-polishing tank, coupling the plurality of rotatable components to a power supply, immersing an immersion portion of at least one of the plurality of rotatable components in the buffered electrolytic solution, passing an electrical energy through the immersion portion of at least one of the plurality of rotatable components while the immersion portion is immersed in the buffered electrolytic solution, wherein an electrical flux to the immersion portion electro-polishes the immersion portion, separating the immersion portion from the buffered electrolytic solution, and applying a corrosion inhibitor to the plurality of rotatable components.

Abstract: A system for de-icing a gas turbine engine is provided. A manifold is coupled to an inlet screen. A first conduit is coupled to a stage of the compressor and a first input of a mixing component. A second conduit is coupled to the exhaust and a second input of the mixing component. The second conduit being adapted to extract exhaust gases without increasing the pressure at the exhaust. A third conduit is coupled to the output of the mixing component and the manifold. A method for de-icing a gas turbine engine inlet screen includes determining a current temperature at the inlet screen, and determining a desired temperature at the inlet screen. If the current temperature at the inlet screen is less than the desired temperature at the inlet screen first flow rate of an air-exhaust mixture necessary to achieve the desired inlet screen temperature is calculated.

Abstract: Disclosed are methods, apparatuses, and systems for generating an alert message based on a determined crossing of a weight threshold of a filter.

Abstract: A method and system for measuring a flow profile in a portion of a flow path in a turbine engine is provided. The system includes a mass flow sensor assembly having a plurality of hot wire mass flow sensors, the mass flow sensor assembly disposed in the portion of the flow path at a location where the flow profile is to be measured. The system also includes a controller that converts signals from the temperature sensor, the pressure sensor and the plurality of hot wire mass flow sensors to flow profile measurements.

Abstract: A method and system for measuring a mass flow rate in a portion of a flow path in an inlet duct of a gas turbine engine is provided. The system includes a sensor assembly attached to the inlet duct. The sensor assembly includes a tube with a longitudinal axis disposed in a substantially laminar flow region of the inlet duct, and a flow conditioner disposed in the tube. A hot wire sensor disposed in the tube is also provided.

Abstract: A system and method for supercharging a combined cycle system includes a forced draft fan providing a variable air flow. At least a first portion of the air flow is directed to a compressor and a second portion of the airflow is diverted to a heat recovery steam generator. A control system controls the airflows provided to the compressor and the heat recovery steam generator. The system allows a combined cycle system to be operated at a desired operating state, balancing cycle efficiency and component life, by controlling the flow of air from the forced draft fan to the compressor and the heat recovery steam generator.

Abstract: A lubrication system for a heavy duty gas turbine includes a bearing lubrication assembly coupled to the bearing and an oil and vapor extraction assembly disposed in a cavity defined by a bell mouth hood in an air inlet duct. A high volume vacuum blower is coupled to the oil and vapor extraction assembly to provide a relative negative pressure. An oil and vapor separator is disposed downstream from the high volume vacuum blower. The lubrication system also includes a control subsystem that maintains a cavity pressure lower than an air inlet pressure.

Abstract: Disclosed are systems, apparatuses, and methods for monitoring fluid passage. In an embodiment, a device may receive a thermographic image of a region comprising a fluid passage. Subsequently the device may determine that the thermographic image comprises an image pattern indicative of a degraded portion of the fluid passage.

Abstract: A system and method is provided that improves the under frequency response of gas turbines by providing a fast-response power augmentation system. The system includes a tank storing a blended mixture of motive fuel such as ethanol or methanol and demineralized water in a predetermined ratio that is provided as a diluent to be injected into the compressor bellmouth, the Compressor Discharge Chamber (CDC), and/or the combustion system via one to three dedicated circuits. To achieve the instantaneous injection of the diluent at the correct pressure and for the appropriate duration to meet the needs of the gas turbine Grid compliance mandate, an accumulator is used as the motive force to drive the augmentation fluid in the dedicated circuits. The injected diluent is microprocessor controlled to either be simultaneous into all three circuits or is sequenced based on a determination of the best turbine control and performance.

Abstract: A filter system and method utilizing a plurality of filters each with an electrically conductive material portion for conducting an electric current while the filter maintains a tight seal and for not conducting the electric current when the filter does not maintain the tight seal.

Abstract: Systems and methods for measuring fouling in a gas turbine compressor include a conductivity resistance sensor disposed in a compressor inlet mouth. The degree of compressor fouling is correlated to changes in resistance measured by the conductivity resistance sensor. Measurements of resistance changes are converted to an indicia of fouling and used to trigger cleaning of the compressor.

Abstract: A method is provided for washing a compressor in a gas turbine. The method includes establishing a compressor fouling set point and sensing a fouling level in the compressor with a sensor. The fouling level is communicated to a control subsystem that determines a wash initiation instruction based on the fouling level and the compressor fouling set point. The wash initiation instruction is executed by initiating a wash with a fluid. A system is also disclosed including a compressor, an on-line wash system coupled to the compressor, and a compressor fouling sensor that senses a compressor fouling level. A source of washing fluid is provided, and a control subsystem that initiates a wash with washing fluid from the source of washing fluid based on a compressor fouling level.

Abstract: The present application thus provides an active cooling system for a compressor and a turbine of a gas turbine engine. The active cooling system may include an air extraction pipe extending from the compressor to the turbine, a heat exchanger positioned about the air extraction pipe, and an external air cooling system in communication with the air extraction pipe.

Abstract: The present application thus provides a wash system for use with a compressor having a bellmouth and one or more extraction pipes. The wash system may include a water source, a first fluid source, a mixing chamber in communication with the water source and the first fluid source, a bellmouth line in communication with the mixing chamber and the bellmouth, and a stage line in communication with one of the extraction pipes.

Abstract: A filter house and cleaning system arrangement for a turbine system and an associated method. The arrangement includes a filter house and filter elements within the filter house. The arrangement includes nozzles that spray a fluid on the filter elements to provide cleaning of the filter elements. The nozzles have structure that permits the nozzles to move within the filter house to adjust where on the filter elements the fluid is sprayed. The arrangement includes a detection device configured to detect a level of cleanliness and provide an output that indicates the level of cleanliness.

Abstract: The present application thus provides a compressor wash system for use about a bellmouth of a compressor of a gas turbine engine. The compressor wash system may include a bellmouth wash nozzle positioned about the bellmouth of the compressor and a wash door assembly positioned about a lower half of the bellmouth such that the wash door assembly may be closed when the bellmouth wash nozzle is activated.

Abstract: A system to improve gas turbine output and extend the life of hot gas path components includes a subsystem for estimating an amount of water or steam to be added to the flow of air to achieve the desired hot gas path temperature. The system includes a water or steam injection component adapted to inject the amount of water or steam to the flow of air to generate a flow of humid air and an injection subsystem adapted to inject the flow of humid air into a nozzle at the turbine stage are also included. The system includes a temperature sensor disposed at a turbine stage, and a subsystem for determining a desired hot gas path temperature at the turbine stage. An extraction conduit is coupled to a compressor stage and is adapted to extract a flow of air.

Abstract: Various embodiments include a leak detection system for a turbine compartment. In some embodiments, the leak detection system includes: a tracer fluid system fluidly connected with the turbine compartment, the tracer fluid system configured to provide an optically detectable fluid to a fluid supply of the turbine compartment; an optical detection system operably connected to the turbine compartment, the optical detection system configured to detect the presence of the optically detectable fluid in at least one location of the turbine compartment; and a control system operably connected to the tracer fluid system and the optical detection system, the control system configured to obtain data about the presence of the optically detectable fluid in the at least one location, and provide an indicator indicating a potential leak location based upon the data about the presence of the optically detectable fluid in the at least one location.

Abstract: The present application provides a multiple fuel delivery system for use with a gas turbine engine. The multiple fuel delivery system may include a first fuel tank with a first fuel therein, a second fuel tank with a second fuel therein, a mixing chamber, and a flow divider downstream of the mixing chamber. The first fuel tank may be in communication with the mixing chamber via a first fuel pump and the second fuel tank may be in communication with the mixing chamber via a second fuel pump.

Abstract: Various embodiments include an exhaust plume mitigation system for a turbine and systems incorporating the exhaust plume mitigation system. In some embodiments, the exhaust plume mitigation system includes: a first conduit fluidly connecting a compressor to an exhaust chamber of the turbine; a first control valve operably connected with the first conduit for regulating flow of compressor air through the first conduit; and a fluid inductor including: a first inlet fluidly connected with the first conduit; a second inlet fluidly connected with ambient; and an outlet fluidly connected with the exhaust chamber.