A vacuum pump comprises: a rotor provided with multiple stages of rotor blades; a base including a ball bearing configured to rotatably support the rotor; an outer cylinder covering the rotor and connected to the base; and a control device including an electronic circuit having a heat generation element. The control device is provided in contact with the outer cylinder.

This disclosure is directed to hydrodynamic electric generators, including their structural design, methods of deployment, anchoring systems, drive systems and control systems. The system can be scaled from ones that can be hand carried to large, stationary devices that can generate up to and greater than 20 kw in a current of 3 knots. In a stationary system, the device can be anchored to an underwater floor by an anchoring device supported by four adjustable legs. These legs can eliminate the need for extensive mooring lines, providing the device with a small footprint that is non-hazardous to marine animals or vegetation. Individual components, such as rotors, generators and other mechanical components can be modularly installed for easy removal and servicing without having to disturb the entire system.

Examples of the present disclosure generally relate to wind turbine blades configured to minimize or eliminate buildup of ice on the blades. In order to maintain an ice free surface on a wind turbine blade, one or more ETH panels are embedded in the wind turbine blade to heat the wind turbine blade. One or more busbars are electrically connected to each of the one or more ETH panels for conducting electrical power to the ETH panels. The busbars may be disposed in an overlapping configuration to provide uniform heating of the wind turbine blade.

A vacuum pump comprises: a pump device configured to rotate a rotor about a rotation axis supported by a ball bearing, thereby discharging gas sucked through a pump suction port from a pump exhaust port; and a control device attached to a side surface along a direction of the rotation axis of the pump device, including an electronic circuit having a heat generation element and a housing configured to house the electronic circuit, and configured to control operation of the pump device. The heat generation element directly contacts an outer plate of the housing not contacting the pump device, and does not contact an outer plate of the housing contacting the pump device.

A power generator is provided that in some embodiments includes a tubular generator housing for receiving a fluid flow at an intake end and discharging the fluid flow at an exit end. A generator compartment located within the generator housing contains an electrical generator. The generator compartment includes a plurality of structural members for centrally locating the generator compartment within the generator housing. A thickness of a thermally conductive outer wall of the generator compartment tapers from a thickest portion in front of the electrical generator to a thinnest portion adjacent to the electrical generator.

A water wheel generator assembly that has a shell formed by a housing, which can be a pre-existing water wheel, and a pair of cover plates. The cover plates have weep holes and vents that maintain pressure, buoyancy, and balance, while improving efficiency and reducing wear on a generator. An internal ridge forces water out from a cavity of the shell. Shell bearings are inset in the cover plates that carry the weight of the shell, removing the weight on the generator. A hollow through shaft passes through the cover plates and allows the passage of cabling therethrough to permit stringing assemblies together. Within the shell, multiple generators can be strung together.

A heat dissipation retaining structure for a heat production device, an installation method thereof, and a wind turbine generator set. The heat dissipation retaining structure comprises a retaining structure body for defining a middle space, and a thermal radiation absorption coating (3), a heat insulating material, or an infrared low-emissivity and high-reflectivity material is at least partially applied to an inner wall of the retaining structure body (5). The air temperature of the environment in the retaining structure is actively decreased by the foregoing structure under the conditions that noise is avoided, environmental friendliness is achieved, external power is omitted, and energy consumption is zero, thereby decreasing the temperature of the heat production device, and ensuring that the heat production device works at the allowable normal temperature for a long time.

Systems and methods for cooling one or more electrical components of a current conversion device of a renewable energy power system (e.g. a wind turbine or a solar power system) are disclosed. In one embodiment, the system includes an immersion tank comprising a cooling medium, a heat exchanger, and a pumping device. One or more of the electrical components are at least partially submerged within the cooling medium, which has a predetermined dielectric constant. The heat exchanger is in fluid communication with the cooling medium of the immersion tank. Thus, the pumping device is configured to circulate the cooling medium between the immersion tank and the heat exchanger to remove heat from the one or more electrical components.

This disclosure is directed to hydrodynamic electric generators, including their structural design, methods of deployment, anchoring systems, drive systems and control systems. The system can be scaled from ones that can be hand carried to large, stationary devices that can generate up to and greater than 20 kw in a current of 3 knots. In a stationary system, the device can be anchored to an underwater floor by an anchoring device supported by four adjustable legs. These legs can eliminate the need for extensive mooring lines, providing the device with a small footprint that is non-hazardous to marine animals or vegetation. Individual components, such as rotors, generators and other mechanical components can be modularly installed for easy removal and servicing without having to disturb the entire system.

A design method of a heat dissipation system of a wind generator system for severe environments includes constructing an outer air duct of the heat dissipation system; determining a suction air amount of the outer air duct; setting an air velocity of an air inlet of the outer air duct; determining an area of the air inlet of the outer air duct; providing the air inlet; and designing a settling chamber. With these steps, the original heat dissipation system of the wind generator system is additionally provided with the outer air duct. Further, the area of the air inlet is controlled to allow the air velocity at the air inlet to be 3 m/s to 4 m/s, thus rare or no suspended substances are suctioned into the outer air duct, and the radiators of the original heat dissipation system suction cooling air from the outer air duct.