An exhaust system for generating electricity is disclosed. The exhaust system for generating electricity uses a specially configured housing, a plurality of static velocity increasing devices, a turbine, and a fan to generate electricity and concurrently exhaust air from a building. In particular, the specially configured housing preferably is designed to be significantly more aerodynamic and reduces any turbulence inside the housing.

An exhaust system for generating electricity is disclosed. The exhaust system for generating electricity uses a specially configured housing, a plurality of static velocity increasing devices, a turbine, and a fan to generate electricity and concurrently exhaust air from a building. In particular, the specially configured housing preferably is designed to be significantly more aerodynamic and reduces any turbulence inside the housing.

The present invention discloses an electric heating thermal management system for an oil and gas transportation pipeline based on renewable energy and CO.sub.2 energy storage. It transmits the feedback data value through a data collection device arranged in the pipeline to the early warning device by the control device. After analysis and processing, the early warning device can feed back the data value to the control device and the remote operation device in two modes. Different degrees of heating amount can be generated for the oil and gas transportation pipelines at different positions in different modes. Hierarchical and distributed management control for the oil and gas transportation pipelines can be targetedly conducted in unblocked, easily blocked and blocked positions of the oil and gas transportation pipeline. The present invention couples the renewable energy electricity supply device and the CO.sub.2 energy storage device.

The present invention discloses an electric heating thermal management system for an oil and gas transportation pipeline based on renewable energy and CO.sub.2 energy storage. It transmits the feedback data value through a data collection device arranged in the pipeline to the early warning device by the control device. After analysis and processing, the early warning device can feed back the data value to the control device and the remote operation device in two modes. Different degrees of heating amount can be generated for the oil and gas transportation pipelines at different positions in different modes. Hierarchical and distributed management control for the oil and gas transportation pipelines can be targetedly conducted in unblocked, easily blocked and blocked positions of the oil and gas transportation pipeline. The present invention couples the renewable energy electricity supply device and the CO.sub.2 energy storage device.

Provided is a wind turbine including: a tower, a nacelle mounted on the tower, an electrical generator housed in the nacelle, a wind rotor rotatably coupled to the nacelle for rotating about a rotational axis and having at least one rotatable blade, two rotating shafts for connecting the wind rotor to the electrical generator, a shaft connector for rigidly connecting the two rotating shafts. The shaft connector includes: a hollow body, at least an inner flange protruding from the hollow body towards an axis of rotation of the shaft connector, the inner flange being connectable to one of the two rotating shafts, at least one hole provided on the hollow body for accessing the inner flange.

Provided is a wind turbine including: a tower, a nacelle mounted on the tower, an electrical generator housed in the nacelle, a wind rotor rotatably coupled to the nacelle for rotating about a rotational axis and having at least one rotatable blade, two rotating shafts for connecting the wind rotor to the electrical generator, a shaft connector for rigidly connecting the two rotating shafts. The shaft connector includes: a hollow body, at least an inner flange protruding from the hollow body towards an axis of rotation of the shaft connector, the inner flange being connectable to one of the two rotating shafts, at least one hole provided on the hollow body for accessing the inner flange.

A wind turbine gearbox, in particular planetary gearbox, has at least one gear which is mounted on an axle, wherein a sliding surface is arranged between the gear and the axle. The sliding surface is arranged on at least one layer of a deposition welded material made from a sliding bearing material. Furthermore, a method produces the wind turbine gearbox.

A wind turbine gearbox, in particular planetary gearbox, has at least one gear which is mounted on an axle, wherein a sliding surface is arranged between the gear and the axle. The sliding surface is arranged on at least one layer of a deposition welded material made from a sliding bearing material. Furthermore, a method produces the wind turbine gearbox.

Implementations of wind energy devices may include a frame coupled to each of a first rotor wheel, a second rotor wheel, a third rotor wheel, and a fourth rotor wheel. Implementations of wind energy devices may also include a first cable configured to rotate about the first rotor wheel and the second rotor wheel and a second cable configured to rotate about the third rotor wheel and the fourth rotor wheel. Implementations of wind energy devices may also include a plurality of airfoils coupled between the first cable and the second cable. Implementations of wind energy devices may include a first generator and a second generator. Implementations of wind energy devices may include a controller coupled to the first generator and the second generator. The controller may be configured to control a speed of rotation of the plurality of airfoils.

Implementations of wind energy devices may include a frame coupled to each of a first rotor wheel, a second rotor wheel, a third rotor wheel, and a fourth rotor wheel. Implementations of wind energy devices may also include a first cable configured to rotate about the first rotor wheel and the second rotor wheel and a second cable configured to rotate about the third rotor wheel and the fourth rotor wheel. Implementations of wind energy devices may also include a plurality of airfoils coupled between the first cable and the second cable. Implementations of wind energy devices may include a first generator and a second generator. Implementations of wind energy devices may include a controller coupled to the first generator and the second generator. The controller may be configured to control a speed of rotation of the plurality of airfoils.