Abstract: According to one embodiment, a blade damage evaluation system comprising one or more computers configured to: evaluate inflow and collision of solid particles into a turbine based on design data, maintenance data, and operation data; and calculate a survival rate by applying at least one data included in at least one of the design data, the maintenance data, and the operation data as at least one factor to a formula that models the turbine by survival time analysis, the survival rate indicating that erosion amount of at least one of a plurality of blades does not reach a predetermined threshold at arbitrary time in future.

Abstract: There is provided a pit initiation evaluation system or the like capable of predicting pit initiation effectively and at low cost. In a pit initiation evaluation system of an embodiment, a pit initiation evaluation unit creates and retains, based on a dry-wet alternate time data, a deposit impurity concentration data, and a pit initiation data on pitting corrosion initiated in each of a plurality of turbine stages when an operation is actually performed in the steam turbine, a pit initiation evaluation table presenting a relationship between a dry-wet alternate time, a deposit impurity concentration, and pit initiation. Further, the pit initiation evaluation unit is configured to evaluate, by using the pit initiation evaluation table, pitting corrosion to be initiated in each of the plurality of turbine stages in an operation planned for the steam turbine.

Abstract: In one embodiment, a turbine monitoring system includes a temperature measurer configured to sense a temperature of steam to be introduced to a steam turbine, and output a sensing result of the temperature. The system further includes an electrical output measurer configured to sense an electrical output of a generator driven by the steam turbine, and output a sensing result of the electrical output. The system further includes a computing module configured to compute an erosion quantity of a moving vane of the steam turbine with water drops, based on the sensing result of the temperature that is output from the temperature measurer and the sensing result of the electrical output that is output from the electrical output measurer. The system further includes an outputting module configured to output information that is based on the erosion quantity computed by the computing module.

Abstract: A technique for simulating and precisely evaluating creep deformation behavior of a nozzle diaphragm in a steam turbine to be operated in a power generation plan involving large output change is provided. A damage evaluation apparatus includes: an acquisition unit configured to acquire detection data from each of a plurality of sensors installed in a steam turbine; a calculation unit configured to calculate operating state quantity of a nozzle diaphragm in the steam turbine on the basis of these detection data; a computation unit configured to compute creep deformation velocity of the nozzle diaphragm on the basis of the operating state quantity; and an estimation unit configured to estimate deformation amount of the nozzle diaphragm from the creep deformation velocity on the basis of a future operation plan for the steam turbine.

Abstract: A material deterioration evaluation device for evaluating embrittlement of equipment, includes: an operation data obtaining unit that detects and obtains a state of the equipment as operation data; an operation data storage unit that saves the operation data; a temperature evaluation unit that calculates a predetermined evaluation-target site temperature of the equipment based on the operation data; an evaluation-target component material storage unit that stores material data of a material forming the equipment and embrittlement estimation formulas; an embrittlement evaluation unit that calculates an embrittlement quantity of the material forming the equipment based on the evaluation-target site temperature, the material data, and the embrittlement estimation formulas; a risk evaluation unit that calculates a damage risk of the material that forms the equipment based on the embrittlement quantity; and a recommended maintenance time presentation unit that presents a recommended maintenance time of the equipme

Abstract: A blade damage evaluation apparatus includes: a registration unit for design information of a turbine and maintenance information; an acquisition processor for detection data of sensors; a first discrimination processor for first facility states of the turbine at a plurality of past time points; a classification processor for classes Cn of a plurality of first facility states; a first determination processor for first operating state values of the turbine; another registration unit for first damage rates at past time points; a setting processor of a characteristic function for each of the classes Cn; a second discrimination processor for a second facility state of the turbine at the current time point; a second determination processor for a second operating state value of the turbine at the current time point; and an analyzer for a second damage rate at the current time point.

Abstract: A blade damage evaluation apparatus includes: a registration unit for design information of a turbine and maintenance information; an acquisition processor for detection data of sensors; a first discrimination processor for first facility states of the turbine at a plurality of past time points; a classification processor for classes Cn of a plurality of first facility states; a first determination processor for first operating state values of the turbine; another registration unit for first damage rates at past time points; a setting processor of a characteristic function for each of the classes Cn; a second discrimination processor for a second facility state of the turbine at the current time point; a second determination processor for a second operating state value of the turbine at the current time point; and an analyzer for a second damage rate at the current time point.

Abstract: A steam turbine exhaust chamber cooling device includes a plurality of spray nozzles, and the plurality of spray nozzles inject spray water from an injection port to the turbine exhaust chamber. Here, a center line of the injection port is inclined with respect to a radial direction of a turbine rotor so that the plurality of spray nozzles inject the spray water in a direction counter to a rotation direction of the turbine rotor. An inclination angle ? at which the center line of the injection port is inclined to a forward side of the rotation direction with respect to the radial direction of the turbine rotor is in a relationship represented by the following formula (A), 25°???45°??(A).

Abstract: A steam turbine exhaust chamber cooling device includes a plurality of spray nozzles, and the plurality of spray nozzles inject spray water from an injection port to the turbine exhaust chamber. Here, a center line of the injection port is inclined with respect to a radial direction of a turbine rotor so that the plurality of spray nozzles inject the spray water in a direction counter to a rotation direction of the turbine rotor. An inclination angle ? at which the center line of the injection port is inclined to a forward side of the rotation direction with respect to the radial direction of the turbine rotor is in a relationship represented by the following formula (A), 25°???45°??(A).