Abstract: A method for restoring a blade or vane platform of a gas turbine assembly configured for a power plant by: providing a blade or a vane having a platform with an edge deterioration zone; removing the deterioration zone by electro discharging machining technology; and rebuilding a removed zone by additive manufacturing technology. The removing can be performed to create a recessed plane along a platform edge, the recessed plane being connected to a platform plane by an enter inclined plane and an exit inclined plane arranged opposed along the platform edge.

Abstract: A thermoinsulating tile for combustion chambers of gas turbines comprises: a thermoinsulating material body having a first face and a second face; a sealed chamber encapsulated in the thermoinsulating material body between the first face and the second face and containing a marker substance in the liquid state at least at a temperature of use of the thermoinsulating tile.

Abstract: A method for restoring a blade or vane platform of a gas turbine assembly configured for a power plant by: providing a blade or a vane having a platform with an edge deterioration zone; removing the deterioration zone electro discharging machining technology; and rebuilding a removed zone by additive manufacturing technology. The removing can be performed to create a recessed plane along a platform edge, the recessed plane being connected to a platform plane by an enter inclined plane and an exit inclined plane arranged opposed along the platform edge.

Abstract: A medium voltage power supply is disclosed as including plural medium voltage power lines and plural medium voltage switchboards, connected by respective medium voltage power lines. The medium voltage switchboards are each provided with a respective electrical protection equipment under the IEC 61850 standard and with respective medium voltage signal couplers driven by the electrical protection equipment to transmit and receive Generic Object Oriented Substation Event messages through the medium voltage power lines.

Abstract: An integrated design system for an electric plant of an industrial site includes: a central processing unit; terminal stations connected to the central processing unit; and a storage unit. The central processing unit includes: a database management module to receive data from the terminals and organize the incoming data in databases; a first computing module, to determine specifications of lighting bodies to be installed according to the content of the databases; and a second computing module, cooperating with the first computing module to determine the sizing and routing of electric cables at least for the lighting bodies, according to the content of the databases. The databases include a lighting database containing values of a first set of parameters relating to environments of the industrial site.

Abstract: A medium voltage power supply is disclosed as including plural medium voltage power lines and plural medium voltage switchboards, connected by respective medium voltage power lines. The medium voltage switchboards are each provided with a respective electrical protection equipment under the IEC 61850 standard and with respective medium voltage signal couplers driven by the electrical protection equipment to transmit and receive Generic Object Oriented Substation Event messages through the medium voltage power lines.

Abstract: The sealing system for a rotating machine comprises a fixed part and a movable part. The fixed part is connectable to a stator of a rotating machine and the movable part is connected to and movable to and fro the fixed part. The movable part is mechanically disconnected from the fixed part. The sealing system comprises a retainer to prevent separation of the movable part from the fixed part.

Abstract: A thermoinsulating tile for combustion chambers of gas turbines comprises: a thermoinsulating material body having a first face and a second face; a sealed chamber encapsulated in the thermoinsulating material body between the first face and the second face and containing a marker substance in the liquid state at least at a temperature of use of the thermoinsulating tile.

Abstract: Alloy composition for the manufacture of protective coatings, comprising cobalt, nickel, chromium, aluminum, yttrium and iridium in amounts so as to obtain the phases ?, ? and ?, in particular for coating a super-alloy article. Preferably, such super-alloy article is a turbine component.

Abstract: A turbine blade is provided with at least one cooling channel and a plurality of cooling holes; each cooling hole being provided with an outlet section having an elongated shape along a principal axis; the height of the outlet section, intended as the measure of the maximum dimension of the outlet section along a direction parallel to the main axis, being equal to at least twice the width of the outlet section, intended as the maximum dimension of the outlet section along a direction orthogonal to the main axis.

Abstract: An integrated design system for an electric plant of an industrial site includes: a central processing unit; terminal stations connected to the central processing unit; and a storage unit. The central processing unit includes: a database management module to receive data from the terminals and organize the incoming data in databases; a first computing module, to determine specifications of lighting bodies to be installed according to the content of the databases; and a second computing module, cooperating with the first computing module to determine the sizing and routing of electric cables at least for the lighting bodies, according to the content of the databases. The databases include a lighting database containing values of a first set of parameters relating to environments of the industrial site.

Abstract: Alloy composition for the manufacture of protective coatings, comprising cobalt, nickel, chromium, aluminium, yttrium and iridium in amounts so as to obtain the phases ?, ? and ?, in particular for coating a super-alloy article. Preferably, such super-alloy article is a turbine component.

Abstract: Alloy composition for the manufacture of protective coatings, comprising cobalt, nickel, chromium, aluminium, yttrium and iridium in amounts so as to obtain the phases ?, ? and ?, in particular for coating a super-alloy article. Preferably, such super-alloy article is a turbine component.

Abstract: A control method for cooling a turbine stage of a gas turbine, whereby cooling air is bled from combustion air flowing in a compressor of the gas turbine, and is fed to a cooling circuit staring from a stator of the turbine stage; and cooling airflow is adjusted as a function of the pressure at the inlet of the cooling circuit, and as a function of the combustion air pressure at the exhaust of the compressor; more specifically, there is a feedback control setting a setpoint, which is predetermined as a function of the power output of the turbine to reduce contaminating emissions.

Abstract: A control device of a gas turbine electric energy production plant (1), which delivers a power (P) at a frequency (fl); the control device (8) comprising power control means (15), for controlling the power (P) delivered by the plant (1) according to a reference power value (PSETNEW), and frequency control means (16), for determining correction values (PFSETPR; PFSETINT) of the reference power value (PSETNEW) according to a frequency error (eF), given by the difference between the plant frequency (f1) and a nominal frequency (fN); the device (8) being characterized in that the frequency control means (16) comprise integral control means (22) configured to calculate the correction values (PFSETINT) if the frequency error (eF) is beyond a first frequency range (B1), and proportional control means (20), which are deactivated when the frequency error (eF) is beyond a first frequency range (B1).

Abstract: A stage of a steam turbine, having a rotor extending along a longitudinal axis, has a fixed stage and a movable stage arranged successively along a flow channel for feeding steam in a direction substantially parallel to the longitudinal axis; the fixed stage has an inner ring coaxial with the longitudinal axis, and a number of stator blades arranged radially about the inner ring; each stator blade is fixed to an annular top portion of the inner ring, which has a top surface facing the flow channel and crosswise to the longitudinal axis; and the movable stage has a number of rotor blades arranged radially about the rotor and fixed to the rotor.

Abstract: A maintenance method of a gas turbine unit, having a first stator element provided with first connecting holes contemplates replacing a second stator element, provided with second connecting holes and connected to the first stator element by means of coupling pins insertable into the first and the second connecting holes, with a third spare stator element provided with third connecting holes; and coupling the first stator element to the third spare stator element by means of eccentric coupling pins and eccentric bushes, each of which is selectively insertable in the first and the third connecting holes.

Abstract: A control device for an asynchronous electric machine comprises a first computing unit configured for defining a first signal, which is correlated to an operating voltage to be applied to the electric machine. The first signal is defined as a function of a second signal indicating a desired stator frequency of the operating voltage, and as a function of a third signal indicating a desired slip frequency of the electric machine.

Abstract: A combined-cycle system includes a compressor, a gas turbine, a steam turbine, and an electric generator, which are coupled to the same shaft. A method of controlling the system envisages detecting a current compression ratio of the compressor, calculating a normalized compression ratio on the basis of the current compression ratio, and determining a load condition of the gas turbine on the basis of the normalized compression ratio. Moreover, a setpoint is selected, for at least one operating quantity of the gas turbine, and regulating signals are applied to actuators of the gas turbine so that the operating quantity of the gas turbine tends to reach the setpoint.

Abstract: A method for pouring resin in a stator (2) of an electric machine, in particular an axial flux machine, in which a plurality of coils (5) is supported by a magnetic core (4) contained in a container (12), in which resin is poured in order to fill the spaces existing between the various components contained in the container (12). The method comprises the steps of heating a resin (20) until it reaches a pre-set temperature T1, corresponding to which is a target value of fluidity; supplying in a controlled way an electric current Istat to the coils (5) so that the current will flow in the coils (5), which behave as resistors, thus obtaining a heating by the Joule effect of the coils (5) which reach a temperature T2 that is higher than the temperature T1 of the resin; mixing the resin with a catalyst and pouring the mixture of resin and catalyst into the container (12) so that the resin fills said spaces; and obtaining complete hardening of the poured resin.