Abstract: Compressor components, such as blades and vanes, having an airfoil portion with an uncoated, nominal profile substantially in accordance with Cartesian coordinate values of X, Y, and Z set forth in Table 1. X and Y are distances in inches which, when connected by smooth continuing arcs, define airfoil profile sections at each Z distance in inches. The profile sections at the Z distances are joined smoothly with one another to form a complete airfoil shape.

Abstract: A dust collecting module for reducing vibration by maintaining a distance between electrodes includes an arrangement of discharge electrodes and dust collecting electrodes alternately disposed and spaced apart from each other, the discharge electrodes configured to be charged to a predetermined voltage for generating a corona discharge between the discharge electrodes and the dust collecting electrodes, at least one dust collecting electrode of the dust collecting electrodes having a first hole; a first hole jig received in the first hole and fixed to the at least one dust collecting electrode, the first hole jig having a larger thickness than the at least one dust collecting electrode; a first tie rod coupled to the discharge electrodes and configured to pass through and fix the discharge electrodes by being fitted into the first hole jig; and a second tie rod coupled to the dust collecting electrodes to fix the dust collecting electrodes.

Abstract: A system for generating learning data is provided. The system for generating the learning data includes a data incorporating part configured to generate new data by filtering plant data based on a warning condition to incorporate the plant data for one configuration of a plant into existing learning data and a learning data generating part configured to differentiate a weight applied to the new data and the existing learning data, respectively, by comparing the number of the new data and the number of the existing learning data, and generate new learning data by combining the new data with the existing learning data to which the weight is applied.

Abstract: A system for controlling a boiler apparatus in a power plant to combust under optimized conditions, and a method for optimizing combustion of the boiler apparatus using the same are provided.

Abstract: Disclosed herein is a combustor capable of improving impingement cooling performance by reducing the influence of a cross-flow on a jet flow. The combustor includes a combustion liner, in which fuel sprayed from fuel nozzles of a gas turbine is mixed with compressed air and the mixture is combusted, a sleeve surrounding the outer surface of the combustion liner while being spaced apart therefrom in order to form a flow passage for compressed air, a cooling hole formed in the sleeve to introduce compressed air discharged from a compressor into the flow passage, and a first auxiliary hole formed upstream of the cooling hole in the airflow direction. Compressed air discharged from the compressor is introduced into the flow passage through the first auxiliary hole, impinges with compressed air flowing through the flow passage, and forms an air column.

Abstract: The present invention relates to a multistage fiber filtering apparatus capable of selectively filtering depending on turbidity of raw water, in which a first filtration mode where the raw water passes through a fiber ball medium, a second filtration mode where the raw water passes through a fiber yarn medium, or a third filtration mode where the raw water passes through both of the fiber yarn medium and the fiber ball medium may be selectively operated.

Abstract: Disclosed is a sequencing batch reactor (SBR) for sewage treatment. The SBR is applicable to an energy-producing sewage treatment system. The SBR includes a treatment tank and a hybrid bacterial strain screening tank. The treatment tank removes ammonium contained in supernatant liquid using anaerobic ammonium-oxidizing (anammox) bacteria. The hybrid bacterial strain screening tank screen anammox bacteria granules out by passing the supernatant liquid discharged from the treatment tank through the hybrid bacterial strain screening tank. The SBR generates biogas using the anammox bacteria and reduces the nitrogen content in the supernatant liquid. The SBR can separate the anammox bacteria granules with high separation efficiency, thereby shortening sewage treatment time and recycling activated sludge, resulting in a dramatic decrease in the amount of waste sludge.

Abstract: The present disclosure relates to an exhaust gas cooling device and method, and more particularly, to a device and method for installing an exhaust gas cooling device on the upper end of a duct of a heat recovery steam generator to cheaply cool the exhaust gas without occupying an additional dedicated area. An object of the present disclosure is to reduce the costs using a cheap cooling device in the cooling path for cooling the exhaust gas. In one aspect, the exhaust gas cooling device includes an exhaust gas cooling unit located on the upper end of a duct of a heat recovery steam generator connected with a gas turbine and for cooling the exhaust gas discharged from the gas turbine; and a control unit for controlling the exhaust gas cooling unit to lower the increase rate of the energy of the exhaust gas flowed into the heat recovery steam generator through the duct.

Abstract: A fault signal recovery apparatus and method for collecting signals obtained in a plant and recovering normal signals from fault signals contained in the measured signals through a machine learning method includes receiving an input X including only normal signals for a plurality of tags, an input U including fault signals for a first group of tags among the plurality of tags and normal signals for a second group of tags, and an input S having information on the first group of tags including fault signals, and estimating and recovering normal signals for the first group of tags including fault signals based on feature information F, recovery model information P, and ensemble learning.

Abstract: A fuel cell system using natural gas, which includes a fuel cell including a cathode and an anode and a cryogenic heat-exchanging apparatus configured to heat-exchange natural gas supplied from a natural gas station with introduced air or exhaust gas of the fuel cell. With the configuration, oxygen which is introduced into the fuel cell can be produced using cold energy of the natural gas, and energy consumed for the oxygen production can be reduced. Also, a discharge of seawater of low temperature can be minimized, thereby reducing negative effects caused by the discharge.

Abstract: A combustor can include: a combustion chamber; a cap covering the combustion chamber; a first swirler inlet cup passing through the cap and having a first length and a first bell mouth; a second swirler inlet cup passing through the cap and having a second length and a second bell mouth; and a third swirler inlet cup passing through the cap and having a third length and a third bell mouth, wherein the first length is different from the third length, and wherein the first bell mouth is different from the third bell mouth. The first, second, and third swirler inlet cups can have different diameters, respectively.

Abstract: A system for oxidizing nitrogen monoxide (NO) contained in exhaust gas injects a liquid oxidizing agent into the exhaust gas and simultaneously removes nitrogen oxides and sulfur oxides from exhaust gas using an organic catalyst. The system includes an absorption tank for storing an absorption solution containing an organic catalyst, the absorption tank communicating with an oxygen supply pipe for supplying oxygen-containing gas to the absorption tank; an absorption tower, extending upward from the absorption tank, through which the exhaust gas flows from an exhaust gas inlet duct to an exhaust gas outlet; a first injection unit to inject the absorption solution into the absorption tower; a second injection unit to inject an oxidizing agent solution into at least one of the inlet duct and the absorption tower; and an oxidizing agent supply unit for supplying the oxidizing agent solution to the second injection unit.

Abstract: In a steam turbine seal packing performance monitoring system, steam pressure is measured by installing a pressure sensor inside a seal packing for preventing steam from leaking, so that pressure information can be transmitted using magnetic field communication in order to externally monitor seal packing performance. The system includes a seal packing unit that is installed on a rotor shaft and has a plurality of seal packs disposed along an axial direction of the rotor shaft; a pressure sensor installed inside the seal packing unit to detect a pressure of steam leaked from inside the seal packing unit and to transmit a magnetic field signal by converting a detection signal indicative of the detected pressure into the magnetic field signal; and an adapter for receiving the magnetic field signal, converting the received magnetic field signal into pressure data, and calculating a leakage amount of steam based on the pressure data.

Abstract: The present disclosure provides a plant abnormality detection system and method, which can learn the plant data collected in real time through a plurality of prediction models having different characteristics to generate a prediction value having the highest accuracy to diagnose the abnormality thereof, thus detecting accurately the abnormality of the plant to early provide alarm.

Abstract: A position determination device determines the position of a terminal. A signal of a sensor attached to one or both of a beacon and a terminal is sampled, so that a signal of the beacon may be transmitted and received only when the beacon or the terminal has moved. A plurality of beacons sequentially transmit beacon signals to determine the terminal position by determining a distance between the respective beacons and the terminal based on a time to receive the beacons. The device includes a beacon for transmitting a beacon signal; a terminal for receiving the beacon signal; and a first sensor attached to the terminal to sense movement of the terminal and to output a first sensing signal indicative of the sensed movement. The terminal has a reception mode for receiving the beacon signal and turns on/off the reception mode based on the first sensing signal.

Abstract: A membrane filtration system and a membrane bio reactor including the same are described. In an example, the membrane filtration system includes: a treatment tank; a membrane support frame disposed in the treatment tank and mounted with a filtration membrane; a reciprocating portion connected to the membrane support frame and reciprocating the membrane support frame; a sliding portion disposed in the treatment tank, connected to the reciprocating portion, and guiding a moving direction of the membrane support frame; and a sludge lifting portion flexibly disposed at a lower end of the membrane support frame to lift sludge accumulated at a lower part of the treatment tank.

Abstract: A wet flue gas desulfurization apparatus includes an absorption tank in which an absorption solution containing an alkaline absorbent is stored; an absorption tower extending upward from the absorption tank; a flue gas inlet duct communicating with a first portion of the absorption tower; a flue gas outlet duct communicating with a second portion of the absorption tower; a spray unit to spray the absorption solution inside the absorption tower; a circulation pump to pump the absorption solution from the absorption tank and to supply the absorption solution to the spray unit; a byproduct discharging unit to discharge a byproduct downward from the absorption tank; and an oxygen supply pipe through which an oxygen-containing gas is supplied to a target point in the absorption tank, the target point being adjustable along a vertical direction or a horizontal direction, enabling adjustment of an internal position to which the gas is supplied.

Abstract: Disclosed herein is a gas turbine blade. The gas turbine blade includes a guide portion disposed adjacent to a direction-changing portion to guide the flow direction of cooling air in order to enhance the cooling efficiency of the turbine blade and promote the stable flow of the cooling air in a cooling passage.

Abstract: A turbine vane assembly and a gas turbine including the turbine vane assembly are capable of adjusting a flow rate and a supply pressure of seal air by adjusting the area of a purge hole. The turbine vane assembly includes a turbine vane disposed between an outer platform and an inner platform; a U-ring unit formed of opposite sides that face each other and are each coupled to the inner platform to form a cavity; a first purge hole formed in one side of the U-ring unit to communicate with each of the cavity and a first wheel space, the first purge hole having an area that is adjustable in size; and a second purge hole formed in the other sides of the U-ring unit to communicate with each of the cavity and a second wheel space, the second purge hole having an area that is adjustable in size.

Abstract: Disclosed herein is a machine for cutting nozzles of reactor vessels. The machine for cutting nozzles of reactor vessels comprises a cutting unit positioned at an upper surface edge of a reactor vessel having a nozzle and having a saw blade part having different contact areas to cut the nozzle, a drive unit providing the saw blade part with rotary power, and a foreign substance suction unit provided at one end of the cutting unit in contiguity with the saw blade part to suck foreign substances generated when the nozzle is cut by the saw blade part, wherein the foreign substance suction unit sucks the foreign substances by approaching an outer peripheral surface of the nozzle when the saw blade part moves in a cutting direction of the nozzle.