Abstract:
A power generation apparatus (2) includes an expander (14); a generator (16) that includes a generator rotor (38) driven by the expander (14) and a stator (40) disposed outside the generator rotor (38) in the radial direction; and a casing (12) that includes an expander chamber (12a) accommodating the expander (14)and a generator chamber (12b) accommodating the generator (16). The casing (12) includes a first communication portion (53) that causes an expansion chamber which gradually expands a working medium by the expander (14) in the expander chamber (12a) to communicate with a front generator portion (12c) which is located nearer the expansion chamber than the generator (16) in the generator chamber (12b) and a second communication portion (54) that causes a portion which is a downstream portion from the expansion chamber and is located near the expansion chamber with respect to the generator (16) to communicate with the front generator portion (12c).
Abstract:
A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control.
Abstract:
A screw expansion power generation device is disclosed, applicable to an Organic Rankin Cycle (ORC). The power generation device includes a semi-sealed or fully sealed shell. The shell includes an expander cavity and a generator cavity. The expander cavity is not in communication with the generator cavity. A screw expander is disposed in the expander cavity, and a generator is disposed in the generator cavity. A rotor of the screw expander is fixedly connected to a rotor of the generator. The power generation device drives the generator to generate power through rotation of the rotor of the screw expander. A liquid refrigerant injection inlet and a refrigerant outlet are disposed on the generator cavity, The generator is cooled through evaporation of a liquid refrigerant. The screw expansion power generation device of the present invention is semi-sealed or fully sealed. The screw expander and the generator are disposed in the shell as a whole. The generator may be a synchronous generator or an asynchronous generator, thereby preventing leakage of the refrigerant when the screw expansion generator generates power.
Abstract:
A mobile drilling rig includes a platform mounted on drivable ground supports. Drilling equipment is disposed on the platform and is operated by a power system that includes hydraulic pumps, a screw type air compressor, and a motor for driving the pumps and the compressor. A gearbox is common to the hydraulic pumps and the air compressor and includes an intermeshing gear arrangement for transmitting an inputted power from the motor to the pumps and the compressor. Compressed air from the compressor travels to an air reservoir in which compressor oil is separated from the air. The compressor oil is conducted to an oil inlet of the gearbox and is circulated through the gearbox to an oil outlet of the gearbox which communicates with an air inlet of the compressor.
Abstract:
A power generation apparatus (2) includes an expander (14); a generator (16) that includes a generator rotor (38) driven by the expander (14) and a stator (40) disposed outside the generator rotor (38) in the radial direction; and a casing (12) that includes an expander chamber (12a) accommodating the expander (14)and a generator chamber (12b) accommodating the generator (16). The casing (12) includes a first communication portion (53) that causes an expansion chamber which gradually expands a working medium by the expander (14) in the expander chamber (12a) to communicate with a front generator portion (12c) which is located nearer the expansion chamber than the generator (16) in the generator chamber (12b) and a second communication portion (54) that causes a portion which is a downstream portion from the expansion chamber and is located near the expansion chamber with respect to the generator (16) to communicate with the front generator portion (12c).
Abstract:
There is provided an electricity generating device comprising a housing (10); a first lobed rotor (21) and a second lobed rotor (22) rotatably arranged in a fluid passage enclosed by the housing (10) such that the lobes of the first (21) and the second lobed rotor (22) intermesh to create a barrier between a high-pressure and a low-pressure side of the housing (10) during operation of the device; a first electricity generator (25) to which the first lobed rotor (21) is coupled, the first electricity generator (25) being capable of varying the load of the first lobed rotor(21); and a second electricity generator (26) to which the second lobed rotor (22) is coupled, the second electricity generator (26) being capable of varying the load of the second lobed rotor (22). There is also provided a method of synchronizing rotational positions of a first lobed rotor (21) coupled to a first electricity generator (25) and a second lobed rotor (22) connected to a second electricity generator (26) in a turbine, said first and second lobed rotors (21,22) being intermeshed, comprising controlling the first and/or the second generator (25, 26) to adjust a rotational position of the first lobed rotor relative a rotational position of the second lobed rotor to avoid contact between the intermeshing lobes of the first and the second lobed rotors.
Abstract:
A system for providing back-up electrical power in the event of failure of the utility electrical supply, which comprises a vessel (11) adapted to contain a volume of compressed gas supplied by a compressor (10), a solenoid valve (14) to release gas from the vessel (11) through a pressure regulator (12) to a scroll expander (15) containing a rotary member which, through the passage of gas, drives a generator (16) thus to generate a supply of electrical power. A power conditioning unit (17) and electronic control (13) determine the operation of the system which occurs automatically upon failure of the utility electrical supply thus to provide a truly uninterrupted power supply for installations such as computers and communication systems.
Abstract:
For low mass flow, the solo use of the turbo-rotary engine overcomes the limitations of conventional internal combustion engines and enable significant improvement in power, torque and efficiency. The solo configurations (Figure 1, 2, 3, 4) of the invention comprise compressor (48) and turbine housings (59), each housing receiving an eccentrically placed rotor (135), equipped by a single sliding vane (50, 63). Contact wear of the sliding vane tips (86, 109) with the chamber non-circular cycloidal peripheral (88, 97), is eliminated by a pivot axle vane retention mechanism (139, 150). For high mass flow rate, a compound configuration (Figures 8, 9, 10) of rotary compressors and turbines with conventional gas turbine engine components. Allows an improvement in efficiency and performance. Conventional long and heavy concentric main shafts are eliminated. In this invention, rotary turbines drive compressors (158), fans (153), propellers and rotary wings (186). In return, the conventional turbines (171) drives a plurality or rotary compressors (164, 166, 168). The compound engine of the invention combines the thermal efficiency of the rotary internal engine cycle (151) and the high mass flow, high power, compact size and light weight of the gas turbine engines.
Abstract:
A system includes an accessory tool selected from a group consisting of a casing unit, a cementing unit, and a drilling unit; and a genset mounted to the accessory tool and comprising: a fluid driven motor having an inlet and an outlet for connection to a control swivel of the system; an electric generator connected to the fluid driven motor; a manifold having an inlet for connection to the control swivel and an outlet connected an accessory tool actuator; and a control unit in communication with the electric generator and the manifold and comprising a wireless data link.