Ansaldo Energia | Date: 2017-05-17
A method of controlling a steam turbine comprises: defining a simplified model (M) of a rotor (5c) of a steam turbine in the form of a homogeneous and isotropic cylinder; determining a stress distribution in the rotor (5c) from parameters of the simplified model (M) and temperature values (ST) of steam (Q_(HP)) supplied to the steam turbine (5); comparing the stress determined in the rotor (5c) with a stress threshold (_(TH)); and controlling the steam turbine (5) on the basis of a comparison between the stress determined in the rotor (5c) and the stress threshold (_(TH)).
Ansaldo Energia | Date: 2017-03-15
A method for balancing a rotor (1) of a gas turbine having a plurality of discs (2) arranged in succession along a line (A) includes the steps of: acquiring eccentricity measurements (ER1,..., ERP) of the discs (2) of the rotor (1) of a gas turbine in an initial configuration; based on the eccentricity measurements (ER1,..., ERP), identifying at least two critical areas of the rotor (1), in which variations of eccentricity between consecutive discs (2) are not in compliance with an acceptance criterion; identifying at least a first group of consecutive discs (2), arranged between two critical areas; determining at least one corrective action of the rotor (1), the corrective action including a relative rotation about the axis (A) between two consecutive discs (2) of the first group of discs (2); and performing the corrective action.
Ansaldo Energia | Date: 2017-01-25
Subject matter of the disclosure is a locking pin arrangement (10) with a basic element (7) for receiving an insert (8) and a fall-proof locking pin (1) for fixing the insert (8) in the basic element (7). The locking pin (1) is at least partially inserted into a borehole (2) of the basic element (7) and is pushed towards an opening of the borehole (2) by a spring (3). The locking pin (1) has a guiding surface (12) for axial guidance in the borehole (2), an outer thread (4) and a constriction (11) positioned between the outer thread (4) and the guiding surface (12), wherein the diameter of the outer thread (4) is smaller than the diameter of the guiding surface (12) and the diameter of the locking pin (1) at the constriction is smaller than the diameter of the outer thread (4). Further, the arrangement comprises an inner thread (5) going from the wall of the borehole (2) into the space formed by the constriction.
Ansaldo Energia | Date: 2017-01-11
A method of manufacturing a structured cooling panel comprises cutting of desized 2D ceramic into tissues; slurry infiltration in the tissues by at least one knife blade coating method; laminating the tissues in a multi-layer panel, with slurry impregnation after each layer, wherein the tissue has combined fibres and/or pre-build cooling holes; drying; de-moulding; sintering the multi-layer panel, wherein part of the combined fibres burns out during the sintering process leaving a negative architecture forming the cooling structure and/or the pre-build cooling holes define the cooling structure; finishing, using of i) post-machine, and/or ii) surface smoothening/rework, and/or iii) coating application, and/or other procedures.
Ansaldo Energia | Date: 2017-02-15
A gas turbine unit includes: a compressor (4) and a turbine (5) along an axis (A); a cooling air circuit (12) to convey cooling air towards the turbine (5); and a pre-swirler (15) that imparts a rotation about the axis (A) to the cooling airflow. The pre-swirler (15) is equipped with flow channels (17) each having an inlet portion (17a), an outlet portion (17b) and a joining section (17c). The joining section (17c) forms a curve shaped so that a wall (17d) of the joining section (17c) on the inside of the curve deviates the cooling airflow about the axis (A), by Coanda effect at an angle correlated to an absolute value of an inlet speed (V_(I)) of the cooling airflow. A passage section (S2) of the outlet portion (17b) allows a plurality of outlet angles of the cooling airflow, in accordance with the rotation caused by the joining section (17c).
Ansaldo Energia | Date: 2017-01-04
A seal for a rotating machine; the seal (6; 106; 206; 306) comprising at least one row of teeth (15a, 15b), the row extending from a first side (6a) to a second side (6b) along an axial direction (B); at least one cavity (16) arranged between respective two adjacent teeth (15a, 15b) of the row of teeth (15a, 15b); wherein at least one of the teeth (15a, 15b) has a first and a second surface (20a, 21a; 20a, 20b) which extend transversely to the axial direction (B), and a third surface (22a, 22b) which extends between the first and the second surface (20a, 21a; 20a, 20b) and transversely thereto; wherein the third surface (22a, 22b) is shaped so as to divert the incoming flow (F) towards the cavity (16a, 16b) adjacent to the second surface (21a, 21b).
Ansaldo Energia | Date: 2017-01-18
A combustion chamber of a gas turbine assembly comprises: a casing (8), defining a combustion volume (8a) therein; a heat shield (10), which lines the inside of the casing (8) and comprises a plurality of tiles (12, 12a, 12b) of a refractory material; structural elements (15) shaped so as to define housing seats (26) of the tiles (12, 12a, 12b) and withhold the tiles (12, 12a, 12b) in the respective housing seats (26); and thermal protection elements (22), arranged so as to cover portions of the structural elements (15) facing the inside of the casing (8).
Ansaldo Energia | Date: 2017-01-25
An alternator is provided with a stator (5), a rotor (6), which is housed inside the stator (5) and is provided with a plurality of electromagnets, and a collector assembly (7), which is configured to supply current to the electromagnets of the rotor (6) and is provided with a chamber (18) and at least a first sliding contact (27) housed inside the chamber (18); the alternator (3) also comprises a monitoring device (8) configured to monitor the conditions at least of the first sliding contact (27) and comprising at least a first photodetector (47) and a second photodetector (48) having a common node (50); the first photodetector (47) and the second photodetector (48) being configured to respectively generate a first current (II) entering the common node (50) and a second current (12) exiting from the common node (50) in response to a respective photon excitation; one between the first photodetector (47) and the second photodetector (48) being arranged so as to frame a region of the chamber (18) comprising at least a part of the first sliding contact (27), the other between the first photodetector (47) and the second photodetector (48) being arranged so as to frame a region of the chamber (18) not comprising the first sliding contact (27).
Agency: European Commission | Branch: H2020 | Program: RIA | Phase: LCE-17-2015 | Award Amount: 9.63M | Year: 2016
The share of renewable energy is growing rapidly driven by the objective to reduce greenhouse gas emissions. The amount of electric power which can be supplied to the grid depends on the time of the day and weather conditions. A conventional fleet of thermal power plants is required to compensate for these fluctuations before large scale energy storage technologies will be mature and economically viable. All power market projections expect this to be the case for the next 50 years at least. For a strong expansion of renewables, this fleet has to operate flexibly at competitive cost. Current power plants cannot fill this role immediately without impeding their efficiency and engine lifetime through increased wear and damage induced by the higher number of (shorter) operating/loading cycles. New technologies need to be introduced to balance demand peaks with renewable output fluctuations at minimal fuel consumption and emissions without negative effects on cycling operation. The FLEXTURBINE partners have developed a medium to long term technology roadmap addressing future and existing power plants. The FLEXTURBINE project presented hereafter is the first step in such technology roadmap and consists of: (1) new solutions for extended operating ranges to predict and control flutter, (2) improved sealing and bearing designs to increase turbine lifetime and efficiency by reducing degradation/damages, and (3) an improved lifecycle management through better control and prediction of critical parts to improve competitive costs by more flexible service intervals and planned downtime, and by reducing unplanned outages. In all areas, individual technologies will be developed from TRL 3 to TRL 4-6. FLEXTURBINE brings together the main European turbine manufacturers, renowned research institutes and universities. It involves plant and transmission system operators to include user feedback and to prepare the take-up of the FLEXTURBINE technologies in power plants world-wide.
Agency: European Commission | Branch: H2020 | Program: Shift2Rail-RIA | Phase: S2R-CFM-IP2-01-2015 | Award Amount: 19.97M | Year: 2016
X2Rail-1 addresses the S2R-CFM-IP2-01-2015 Start-up activities for Advanced Signalling and Automation System call issued by the Shift2Rail Joint Undertaking as part of the Innovation Programme 2 Advanced Traffic Management & Control Systems. The X2Rail-1 project aims to research and develop six selected key technologies to foster innovations in the field of railway signalling and automation systems towards a flexible, real-time, intelligent traffic management and decision support system. The actions to be undertaken in the scope of X2Rail-1 are related to the following specific objectives: To overcome the limitations of the existing communication systems by adapting radio communication systems which establish the backbone for the next generation advanced rail automation systems. To improve the usable track capacity by introducing more Automatic Train Operation (ATO) systems and Moving Block systems. To innovate the signalling architectures towards more decentralized and less cost intensive systems by incorporating Moving Block systems and Smart Wayside Objects. To minimize energy consumption and to improve train punctuality through more extensive use of Automatic Train Operation (ATO) systems. To increase innovation in the field of lab testing by developing architectures for new lab test systems and simulations for control, command and communication systems in order to reduce costs. To ensure security among all connected signalling and control systems by developing new cyber security systems dedicated to railways. To ensure the backward compatibility of ERMTS/ETCS technologies, notwithstanding of the required functional enrichment of the future signalling and control systems.