476results about "Working fluid for engines" patented technology

The shutdown of a compressor (10) installed in a refrigerant circuit (2) in air conditioning or refrigeration system is controlled so as to prevent unpowered reverse rotation of the compressor. Prior to terminating electric power to the compressor drive motor (24), the pressure within the system is relieved and substantially equalized across the compressor, thereby eliminating the possibility of unpowered reverse rotation of the compressor at shutdown. Pressure relief and equalization may be achieved by reducing the operating speed of the compressor to a low forward speed for a period of time prior to deenergizing the compressor drive motor. Pressure equalization may also be achieved by driving the compressor in reverse rotation prior to deenergizing the drive motor.

A device and related method that provides, but is not limited thereto, a two-phase heat transfer device with unique combination of enhanced evaporation and increased cooling capacity. An advantage associated with the device and method includes, but is not limited thereto, increased cooling capacity per unit area, controlled and optimized evaporation, prevention of boiling, and prevention of drying of the evaporator. An aspect associated with an approach may include, but is not limited thereto, using a non-wetting coating or structure to keep working fluid away from the spaces between elongated members of an evaporator and using a wetting coating or structure to form thin films of working fluid around the distal region of the elongated members. For example it can be used to cool a computer chip, a skin of a hypersonic flying object, parabolic solar collector, turbine or engine blade, or any other heat source that requires high heat flux.

Renewable energy sources such as solar power and wind power are intermittent and variable. It is desirable to store energy produced by these systems so it can be utilized when these sources are not producing. The battery system combines the force of gravity with high density water to generate electricity in a turbine. The water is stored at surface level and returned to the elevated storage site when renewable energy is available to pump it to the storage facility. The density of the water can be increased with the use of soluble and insoluble ground minerals using suspending agents and surfactants. These batteries can operate independently to generate AC current for supporting grid demand or can generate DC current for specific applications like regenerating chemical batteries used in transportation devices such as automobiles and trucks.

The present invention provides a heat engine operating on a novel closed thermodynamic cycle. The primary characteristics of the heat engine comprise a boiler, condenser, liquid pump, and a regenerative expander in which heat is recovered from the expansion / work extraction process to be returned to the sensible heat addition process that occurs between the condenser outlet and the boiler inlet. The regenerative expander may be comprised of a novel turbine design described as part of the present invention. The primary characteristic of the turbine being a rotor consisting of a hub intersected by a plurality of narrow helical channels through which motive fluid is directed by a plurality of nozzles to induce rotation in the same direction as the helical path of the channels. The liquid pump of the heat engine may also be comprised of a novel design based on similar working principles to the above turbine.

Provided is an electric water pump including: a lower casing to which the bottom of a shaft is fixed; an upper casing coupled to the top of the lower casing and including an upper support part extending from the inside; an impeller inserted into an internal space formed by coupling the lower casing with the upper casing and having a thrust plate coupled thereto; and a rotor formed integrally with the impeller, wherein an upper side of the thrust plate is supported by the upper support part and a lower surface of the thrust plate is supported by the top of the shaft. In this way, the impeller and the rotor may be supported on both sides of a central axis, and a frictional force occurring between the parts in contact with each other and rotated relatively may be minimized, thereby improving efficiency and reducing noise.

A vertical-axis turbine extending longitudinally along an axis of rotation is disclosed, wherein the turbine has first and second blades disposed around the axis of rotation, the first and second blades having proximal portions and distal portions located relatively close to and away from the axis of rotation respectively, and body portions located between the proximal portions and the distal portions. The turbine also has a rotor assembly coupled to an end of the first and second blades. The proximal portion of the first blade contacts the body portion of the second blade and the proximal portion of the second blade contacts the body portion of the first blade to form a closed volumetric region around the axis of rotation. The shape of the first and second blades may be defined by twisting a sheet of flexible material according to a frame comprising two or more pairs of battens.

The present application pertains to systems and methods for desalination. In one embodiment the system employs a first storage reservoir configured to be near the surface of a body of water and configured to store a low density fluid. A second storage reservoir is configured to be located below the surface of the body of water. A desalination system is operably connected to the second reservoir. Desalinated water is produced by allowing desalination permeate to displace low density fluid in the second reservoir and transfer the low density fluid from the second reservoir to the first reservoir. Desalinated water is exported by transferring low density fluid from the first reservoir into the second reservoir to displace desalinated water from the second reservoir into a water export pipeline.

To provide a fan capable of reducing the noise associated with an unstable flow.SOLUTION: A fan (axial fan, radial fan or diagonal fan) has an impeller and a guide device that is in a flow path upstream of the impeller, preferably in the flow path upstream of an inlet area of an inlet nozzle. The guide device is designed as an intake grid (1) having flat webs (5). The flat webs (5) form a plurality of flow channels resembling grid apertures (6).SELECTED DRAWING: Figure 1

To provide a heat exchanger system.SOLUTION: In one aspect, the disclosed embodiments relate to a system. The system may include a turbine and a regenerative heat exchanger system. The regenerative heat exchanger system is configured to receive the exhaust gas from the turbine. The regenerative heat exchanger system may include a pre-cooling section for cooling the exhaust gas, a primary heating section for receiving the cooled exhaust gas, and a secondary heating section for receiving the cooled exhaust gas.SELECTED DRAWING: None

A concave hermetic air / brine encapsulating vessel, or cap (10), positioned in the sea at a chosen area according to tidal range. Wherein the open underside of the vessel allows brine / sea water to freely enter or exit the vessel and the tide rises and falls respectively. This rise and fall of the brine within the vessel will result in changes to the air pressure within the vessel, as the air because pressurised as the brine rises, and forms a vacuum with the vessel as the brine falls. These changes in pressure are used to operate a pneumatic actuator (60), via a suitable system of valves (50,52) coupled to the inlets and / or outlets of a pipe couple to a vent (30) on the upper portion of the vessel, or within a plurality of pipes couple to a manifold (40) coupled to the vent (30). Wherein the operation of the pneumatic actuator (60) powers a generator (62) for producing and storing power.

A rotational output assembly is configured to provide power to a drive assembly to cause pumping by a pump. The rotational output assembly includes an electric motor and a pinion drive projecting axially from the motor. The pinion drive interfaces with bearings supported on a pump frame. The pinion drive includes a gear teeth section between portions interfacing with the bearings supported on the pump frame. The gear teeth section interfaces with a drive gear of the drive assembly to cause rotation of the drive gear.

Device and Method: Thrust reverser (20) for a propulsion system (10), comprising a fixed part (29), a movable part (39), and an actuation device (38), adapted to move the movable part (39) between the closed and deployed states, the fixed part comprising a deflection edge (40) adapted to direct an airflow from the inside of the thrust reverser outwards through a counter-thrust opening, characterized in that said deflection edge (40) has a surface (50) configured to generate turbulence in the fluid flow along the deflection edge (40) and minimize fluid separation along said deflection edge (40). Figure for the abstract: Fig. 8.

An aircraft propulsion system (20) includes a bottoming cycle (60) where a working fluid is heated and expanded through a bottom turbine to generate shaft power. A first heat exchanger (44) provides thermal communication between a fuel cell exhaust flow and the working fluid of the bottoming cycle (60). The working fluid is cooled by a cryogenic fuel flow (56) in a fuel / working fluid heat exchanger (54).

To suppress a decrease in the operating rate of a compressor when a test run of a predetermined compressor unit is performed. [Solution] The compressor includes a plurality of compressor units, each having a compressor body that compresses gas and a motor that drives the compressor body, piping that connects the plurality of compressor units, and a control device that controls the plurality of compressor units. The control device stops operation of a compressor unit that satisfies an abnormal stop condition among the plurality of compressor units, and performs a test run of the compressor unit that satisfies the abnormal stop condition while continuing the number-controlled operation of the other compressor units.

An electric compressor comprises a motor configured to generate power; a compression mechanism configured to be driven by the motor and to compress a coolant; an inverter configured to control the motor; and a connector configured to include a terminal pin connecting the motor and the inverter, a plate supporting the terminal pin, and an insulator isolating between the terminal pin and the plate. At least a portion of the insulator is designed to be surrounded by the terminal pin, thus mitigating the increase in cost, weight, and size due to the connector.

An exemplary power system utilizes turbines configured within a water intake conduit to the desalination processor to produce power for the desalination processor. Water intakes are configured to provide a natural flow of water to the desalination processor though hydrostatic pressure. One or more turbines coupled with the water intake conduits are driven and produce power for the system, as well as through solar and battery power. The desalination processor incorporates Graphene filters to and may include a structured water system to increase the H3O2 concentration of the water prior to Graphene filters. Discharge water may be pumped back into the body of water but be separated from the intakes. A secondary power source, such as a renewable power source, may be used to produce supplemental power for the system. Power produced may be provided to a secondary outlet, such as a power grid, all above and / or underground.

The present invention provides a passive pitch system for a tidal turbine having a rated power output, the passive pitch system comprising: (a) a rotor rotatably engaged with a mechanical power transmission system of the tidal turbine, the rotor having a rotor hub rotatable about a rotor axis, the rotor hub having blade receiving portions for engagement with the blades; and (b) blades having (i) a first end and a second end opposite the first end, a blade inner portion extending from the first end toward the second end, and a blade outer portion extending from the second end toward the first end. a blade comprising: (i) an elongated body having a blade outer portion, the elongated body defining a leading edge extending between first and second ends and a trailing edge extending between the first and second ends opposite the leading edge; (ii) a blade root portion located at the first end of the blade, the blade root portion configured to fixedly engage the elongated blade body and to rotatably engage a blade receiving portion of the rotor about a pitch axis; and (c) a lever having: (i) a first engagement portion for fixedly engaging the blade root portion; and (ii) a resilient biasing means. a rotor comprising: (a) a lever having a body having (i) a second engagement portion opposing the first engagement portion for engagement with the rotor hub; and (ii) a third engagement portion for engagement with the stop member; d) a stop member fixedly engaging the rotor hub; and e) elastic biasing means having a first end engaging with the second engagement portion of the lever and a second end opposite the first end, the second end being coupled at a position away from the stop member and having a predetermined preload selected according to the rated power output of a tidal turbine with which the rotor hub is engaged in use; wherein, in use, when a hydrodynamic moment acting on the blade about the pitch axis is less than a moment applied to the blade about the pitch axis by the elastic biasing means, the elastic biasing means biases the lever into engagement with the stop member; and when the hydrodynamic moment acting on the blade about the pitch axis exceeds the moment applied to the blade about the pitch axis by the elastic biasing means, the blade is rotatable about the pitch axis and moves the lever away from the stop member.

A scroll compressor is provided. The scroll compressor comprises: a first compression part comprising a first stationary scroll and a first orbiting scroll; and a second compression part comprising a second stationary scroll and a second orbiting scroll, wherein at least one of the first compression part and the second compression part may have a capacity variable part equipped therein so as to induce refrigerant discharge from a compression chamber or to induce idling by blocking refrigerant suction in the compression chamber. The above configuration facilitates varying the capacity of the compressor while significantly reducing the capacity variation ratio, thereby increasing the energy efficiency of the compressor and the air conditioner equipped therewith.

Conventional hydropower plants require significant hydrostatic head to produce sufficient power. As such, there is a need for efficient hydropower plants that may be utilised in sites having a low hyd

A screw pump having a main shaft housing (2) in which a drive main shaft (3) and at least one driven main shaft (4) engaged therewith are accommodated in main shaft boreholes, and having an outer housing (5) surrounding the main shaft housing (2), on which an axial inlet connection (6) and a radial outlet connection (9) are arranged, the main shaft housing (2) having an axial fluid outlet for fluid conveyed through the main shaft housing (2) via the drive main shaft and the driven main shaft, and having a drive motor (11) comprising a drive shaft (12) which extends through a borehole (23) in a housing wall (15) axially closing off the interior of the outer housing (5) and is coupled to the drive main shaft (3), wherein a portion of the fluid flowing out of the fluid outlet of the main shaft housing (2) flows along the drive shaft (12) through the unsealed borehole (23) into the drive motor (11), is cooled there and flows back into the outer housing (5).

The present invention relates to a motor pump, a pump unit, and a method of balancing an impeller of the motor pump. The motor pump includes an impeller (1), a rotor (2), a stator (3), and a bearing (5). The rotor (2) and the bearing (5) are arranged in a suction side region (Ra) of the impeller (1).

Systems and methods for power recovery in carbon capture and storage applications are provided. Such systems and methods include ESP systems including permanent magnet motors (PMM) or induction motors (IM). Systems and methods for power generation including permanent magnet motor electric submersible pumps are also provided.

The present invention provides a vacuum exhaust device capable of controlling the pressure in an exhaust chamber with high precision and high speed, and a vacuum pump therefor. The device comprises: a vacuum pump (1) having a rotor that exhausts the interior of an exhaust chamber (4) by rotating, and a housing having an air intake port; a valve (2) disposed between the air intake port of the vacuum pump (1) and the exhaust port of the exhaust chamber; and a control device (3) that controls the pressure inside the exhaust chamber (4) to be consistent with a target value. In the control device (3), the opening of the valve (2) is adjusted when the absolute value of the difference between the pressure inside the exhaust chamber (4) and the target value is greater than a predetermined value, and the rotation speed of the rotor of the vacuum pump (1) is adjusted when the absolute value of the difference between the pressure inside the exhaust chamber (4) and the target value is less than a predetermined value.

This invention provides a porous piston body for an air compressor cylinder, specifically a piston head in an air compressor cylinder with at least one fixing pin on its top surface to position at least one intake baffle. The intake baffle has at least one bent section adjacent to its positioning area, and the other side of the intake baffle on the bent section is an operating area. This operating area can cover at least one air hole on the top surface of the piston head. An annular groove is recessed on the piston head surrounding the air hole, in which a spring can be housed. The other end of the spring extends upward along the annular groove and abuts against the back of the aforementioned intake baffle. The operating area forms a slightly open ventilation space with the top surface of the piston head on the back side facing away from the cylinder top, so that the pressure inside the cylinder is balanced with the external atmospheric pressure.

A scroll compressor including a casing forming the exterior; a driving unit installed in the casing and generates a drive power; a rotary shaft installed in the driving unit to be rotatable; a compression portion including an orbiting scroll installed on the rotary shaft to be capable of orbiting, and a fixed scroll which is coupled to be engaged with the orbiting scroll so as to form a compression chamber between the orbiting scroll and the fixed scroll; and a check valve including a valve portion which is arranged so that one side thereof faces the compression chamber and guides suction of a refrigerant when being opened and is closed when the driving of the compressor is stopped so as to prevent the refrigerant from flowing backward, and a valve fixing portion which is installed on the side surface provided in the suction port of the fixed scroll.

Provided is an electric compressor that can suppress increases in cost, weight, and size due to a connector for connecting a motor and an inverter. [Solution] The present invention relates to an electric compressor, comprising: a motor that generates power; a compression mechanism that is driven by the motor to compress a refrigerant; an inverter that controls the motor; terminal pins that electrically connect the motor and the inverter; a plate that supports the terminal pins; and a connector having an insulator that insulates between the terminal pins and the plate, wherein at least a portion of the insulator is formed to surround the terminal pins, thereby suppressing increases in cost, weight, and size due to the connector, and wherein the terminal pins include portions with different cross-sectional areas in a direction perpendicular to the extension direction.

The invention relates to a method and a device for generating heat, in which a mechanical movement from wind, waves or water flow is used to operate a compressor and the waste heat of the compressor is utilized.

Disclosed is a scroll compressor including a casing having an oil storage space, a fixed scroll disposed inside the casing, an orbiting scroll disposed on one side of the fixed scroll and performing an orbiting motion relative to the fixed scroll so as to form a compression chamber, a discharge cover coupled to another side opposite to the one side of the fixed scroll and having a cover bottom surface, and an oil feeder coupled to the cover bottom surface to face a direction opposite to the fixed scroll, to communicate with the oil storage space, wherein the cover bottom surface disposed at an inner side of an inner circumference of the oil feeder is provided with a discharge hole formed to communicate with the inner side of the oil feeder.

An oscillating water column (OWC) includes a top body and a bottom body. The top body includes a hollow shape, an open top end, an open bottom end, a chamber traversing between the open top and bottom ends, a power take-off system proximate to the open top end, and an air channel proximate to the open top end and the power take-off system. The bottom body includes a bottom heave plate and a plurality of flexible tethers coupling the top body and the bottom body.