A vacuum pump and a stator column wherein partition walls from an outer peripheral surface of the stator column toward an inner periphery of a rotor blade are provided at two spots, and a groove-shaped channel in a circumferential direction is provided. A sectional area of the channel changes in the circumferential direction. As a result, the pressure difference between a front and a rear of the partition wall on a downstream side is made uniform regardless of a location, and a flowrate of the gas passing through a gap between the partition wall on the downstream side and the inner peripheral surface of the rotor blade is made uniform regardless of the location. The change in the sectional area is achieved either by changing a depth of the groove-shaped channel or by changing an interval between the partition walls at the two spots.

A process for storing large amounts of energy underground in existing or artificial aquifers at very large scale using deep-water, high-pressure electrolysis. The process is intended for use as large scale storage for electrical power grids. When implemented at depths greater than roughly 500 m, it provides stored energy density equal to or greater than lead-acid batteries while requiring only a pressure vessel. If the geologic structure is appropriate, the vessel may already exist naturally.

Because this process does not require compression of the gas(es), when the gas(es) is expanded it become quite cold and therefore extracts heat from the atmosphere. When combined with a sustainable energy source such as wind, solar, ocean or other similar source—the entire process is endothermic. The cold gas(es) can also be used to precipitate CO.sub.2 and condense CH.sub.4 directly from the atmosphere. This means the combination of these processes removes heat and carbon from the environment at the same time they provide large scale, lower cost grid energy storage.

A hydrocarbon reclamator consists of a closed chamber having an exhaust inlet port, a hydrogen inlet port, and a hydrocarbon outlet port. A magnetic flux is generated at the base of the closed chamber and a rotor is suspended by the magnetic flux within the closed chamber. The rotor is formed as a Tesla turbine having axially spaced discs concentrically mounted on a central shaft, a catalyst is formed on surfaces of the discs, and flow holes are formed through the discs. Venturi forces direct gas to release kinetic energy against the discs, so that hydrogen entering the chamber combines with carbon entering the chamber to form a hydrocarbon that exits the chamber via the hydrocarbon outlet port.

The present invention relates to systems and methods for controlling a power production plant and optionally providing a one or more product streams for an end use thereof. Control of a power production plant specifically can include executing one or more functions effective for adjusting a heat profile of a heat exchange unit (HEU) operating with a plurality of streams passing therethrough. This can include implementing a control function that alters a flow of one or more of the plurality of streams by adding flow to or withdrawing flow one or more of the plurality of streams at an intermediate temperature range within the HEU at a point that is positioned between a first end and a second end of the HEU.

This disclosure is related to a thin type counter-rotating axial air moving device. The ratio of the front hub diameter to the front blade diameter is about 0.3 to about 0.85. The front average pitch angle of the front blades is greater than about 46 degrees. The ratio of the rear hub diameter to the rear blade diameter is about 0.3 to about 0.85. The rear average pitch angle of the rear blades is less than about 38 degrees. The ratio of the total thickness to the greater one between the front blade diameter and the rear blade diameter is less than or equal to about 0.75.

A power generation assembly and related methods to enhance power efficiency and reduce greenhouse gas emissions associated with a power-dependent operation, may include a gas turbine engine. The power generation assembly also may include a heat exchanger positioned to receive exhaust gas from the gas turbine engine during operation. The heat exchanger may include an exhaust gas inlet positioned to receive exhaust gas and a liquid inlet positioned to receive liquid. The heat exchanger may be positioned to convert liquid into steam via heat from the exhaust gas. The power generation assembly further may include a steam turbine positioned to receive steam from the heat exchanger and convert energy from the steam into mechanical power. The power generation assembly still further may include an electric power generation device connected to the steam turbine and positioned to convert the mechanical power from the steam turbine into electrical power.

A mobile source of electricity is converted from a transportation mode to an operational mode. A turbine disposed on the mobile source of electricity is operated to generate electricity in the operational mode. A first control valve is operated to feed a cooling agent from a cooling agent source into a heat transfer apparatus disposed in an air intake flow path of the turbine to cool intake air. A second control valve is operated to vent from the heat transfer apparatus, the cooling agent that is heated by absorbing heat from the intake air flowing through the air intake flow path. A controller controls the first and second control valves to maintain the cooling agent having predetermined properties in the heat transfer apparatus.

The invention provides a CO.sub.2 turbine power generation system that can be easily prevented from reaching an overspeed condition. A CO.sub.2 turbine power generation system of an embodiment includes a CO.sub.2 medium shutoff valve installed in a medium flow path between a regenerative heat exchanger and a combustor. When load rejection is to be performed, the CO.sub.2 medium shutoff valve closes to shut off the supply of the medium from the regenerative heat exchanger to the combustor.

A bypass valve assembly for a turbine generator includes a valve body, bypass seats, valve stem, valve cap, bypass valve disc, bypass valves, and pressure seal head. The valve body defines a central bore and a plurality of passageways. Each passageway has an inlet smaller than its outlet. Each bypass seat is within the inlet of a corresponding passageway. The bypass seats have a higher wear resistance than the valve body. The valve stem is within the central bore. The valve cap is secured to the valve body. The bypass valve disc is secured to the valve stem. Each bypass valve has a base portion and a nose portion. Each nose portion defines a contoured surface area with a wear coating and extends into a corresponding passageway. The pressure seal head is disposed around the valve stem and defines steps having a wear coating.

A vacuum pump includes a housing, a rotor cylindrical portion, and a stator cylindrical portion. The housing has an inlet port for sucking gas and an outlet port for discharging the sucked gas. The rotor cylindrical portion is housed in the housing. The stator cylindrical portion is housed in the housing, and is arranged to face the rotor cylindrical portion. A screw groove is formed on one of opposing surfaces of the stator cylindrical portion and the rotor cylindrical portion. The groove depth D of the screw groove is smaller at an end on an exhaust side than at an end on a suction side. The decrement of the groove depth D is greater on the suction side than on the exhaust side.