Provided are a main steam piping connecting a steam generator and a steam turbine, a bypass piping branched from the main steam piping and bypassing the steam turbine, a bypass valve provided in the bypass piping, a warming piping branched from the bypass valve, a warming valve provided in the warming piping, and a control system. The control system controls the warming valve in such a manner that bypass valve temperature t is brought to within a temperature range satisfying the three conditions: (1) being equal to or higher than the saturated temperature of steam flowing into the bypass valve; (2) having a temperature difference from the flowing-in steam of equal to or less than an allowable value; and (3) being equal to or lower than a temperature at which the formation rate of steam oxidation scale rises.

Systems and methods for utilizing steam powered green energy for an electric charging system for charging electric vehicles are disclosed. A control unit may manage the electricity generation and delivery to a high voltage charging station, e.g., 480+V. A steam source may provide pressurized steam to a turbine and generator to generate electricity, or store it for later in a storage unit, for delivery to the charging station. The control unit may assist in regulating the flow of the pressurized steam through one or more valves. The control unit may also be in communication with, at least, the generator and charging station to identify charging requirements, manage electricity distribution and consumption, deliver electricity to the charging station, and determine billing based on delivery. Generated electricity may be stored in the batteries of an electric vehicle when the batteries are charged, and then later, the vehicle's batteries may be utilized in a vehicle-to-grid system whereby the electrical power in the vehicle's batteries is supplied, e.g., through a home Level 2 charging station with vehicle-to-grid technology, to the electrical grid.

A valve assembly for use to regulate a flow of steam in a flowpath of a turbine. The valve assembly can be configured with a body that circumscribes a rotor. The body is disposed upstream of the rotor blades. In one implementation, the body forms an annular ring with a plurality of arcuate segments, each being configured to move independently of the other segments in the ring to change the size of an annular gap between the arcuate segments and the rotor. The size of the annular gap corresponds with flow parameters for working fluid that flows across the rotor and that exits the turbine for use in pre-heaters and like collateral equipment.

Methods and systems for lifting wellbore fluids in a subterranean well towards a surface include providing a closed water system free of fluid communication with the wellbore fluids, the closed water system having a water storage tank located outside of a high temperature zone of the subterranean well. Water from the water storage tank is circulated into the high temperature zone of the subterranean well to form a steam. A downhole steam turbine is rotated by the steam to drive a submersible pump system in fluid communication with the wellbore fluids and the wellbore fluids are lifted towards the surface with the submersible pump system. The steam exiting from the steam turbine is directed towards the water storage tank.

A system includes an HRSG that includes a plurality of heat exchanger sections fluidly coupled to each other. The plurality of heat exchanger sections comprises at least one economizer, at least one evaporator, at least one reheater, and at least one superheater. In addition, the HRSG includes an additional heat exchanger section coupled to two different heat exchanger sections of the plurality of heat exchanger sections. Further, the HRSG includes a controller programmed to selectively fluidly couple the additional heat exchanger section to one of the two different heat exchanger sections to alter a heat duty for the selected heat exchanger section fluidly coupled to the additional heat exchanger.

A steam turbine plant and an operating method thereof, and a combined cycle plant and an operating method thereof, include: a turbine; steam supply lines that supply main steam to the turbine; a steam control valve and an intercept valve provided to the steam supply lines; and a first auxiliary steam supply line that supplies auxiliary steam to the turbine via the steam supply lines which are located farther downstream than the steam control valve and the intercept valve.

Power recovery turbines can be used debottlenecking of an existing plant, as well as recover electric power when revamping a plant. A process for recovering energy in a petroleum, petrochemical, or chemical plant is described. A fluid stream having a first control valve thereon is identified. A first power-recovery turbine is installed at the location of the first control valve, and at least a portion of the first fluid stream is directed through the first power-recovery turbine to generate electric power as direct current therefrom. The electric power is then recovered.

In one embodiment, a plant control apparatus controls a power plant, which includes a gas turbine, a generator driven by the gas turbine, an exhaust heat recovering boiler to generate first steam using heat of exhaust gas from the gas turbine, a steam turbine driven by the first steam, and a clutch to connect a first shaft connected to the gas turbine and generator with a second shaft connected to the steam turbine. The apparatus includes a starting module to start the gas turbine and generator while holding the steam turbine in a stop state, when the clutch is in a released state. The apparatus further includes a warming module to warm the steam turbine by supplying second steam from equipment different from the boiler to the steam turbine in parallel with the starting of the gas turbine and generator, when the clutch is in a released state.

The invention relates to a steam turbine having a plurality of stages comprising a plurality of points of admission connected to a plurality of admission lines, a feed line connected to the plurality of admission lines and at least one extraction line, extending from an intermediate stage of the steam turbine, for extracting steam from the steam turbine. The at least one capacity line fluidly connects an admission lines and at least one extraction line so as to bypass the steam turbine, and is further configured to increase a swallowing capacity of the steam turbine as measured from the feed line upstream of the capacity line compared to the plurality of points of admission.

A hybrid power plant system including a gas turbine system and a coal fired boiler system inputs high oxygen content gas turbine flue gas into the coal fired boiler system, said gas turbine flue gas also including carbon dioxide that is desired to be captured rather than released to the atmosphere. Oxygen in the gas turbine flue gas is consumed in the coal fired boiler, resulting in relatively low oxygen content boiler flue gas stream to be processed. Carbon dioxide, originally included in the gas turbine flue gas, is subsequently captured by the post combustion capture apparatus of the coal fired boiler system, along with carbon diode generated by the burning of coal. The supply of gas turbine flue gas which is input into the boiler system is controlled using dampers and/or fans by a controller based on an oxygen sensor measurement and one or more flow rate measurements.