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.

In order to maximize cooling while minimizing drag in aerial vehicles of airborne wind turbines, it may be preferable to dissipate the cooling energy of the motors via a radiator in a region with advantageous airflow parameters. Aerial vehicle rotors operating in thrust mode may produce relatively more airflow velocity in certain regions further away from the center of the rotor blades, both radially and longitudinally. Placing a radiator in a rotor-supporting pylon and offset from the center of the rotor blades and aft of the rotor blades may allow for greater cooling while the aerial vehicle while in thrust mode.

A wind turbine blade 2 comprises a profiled contour including a leading edge 34 and a trailing edge 33 as well as a pressure side and a suction side. The profiled contour is formed by a first shell part 10 and a second shell part 15 being bonded together in a bonding region between the first and the second shell part by a curable bonding means 40. The first and the second shell part 10; 15 are formed in a fiber-reinforced polymer. The wind turbine blade further comprises resistive heating means 50 being arranged in thermal connection with the bonding means 40 such that the resistive heating means 50 supplies heat for curing of the curable bonding means 40 during assembling of the wind turbine blade.

Provided is a nacelle for a wind turbine extending along a longitudinal axis and including an outer surface and an heat exchanger on the outer surface, the heat exchanger including a plurality of fluid passages for a fluid to be cooled in the heat exchanger and a plurality of air passages for a cooling air flow in thermal contact with the fluid passages, the air passages extending between an inlet surface and an outlet surface of the heat exchanger. The inlet surface is inclined with respect to the longitudinal axis of an installation angle between 0° and 90°.

The present disclosure relates to an armature for a wind turbine generator. The generator may be a permanent magnet generator. The present disclosure further relates to methods for operating such armature, generator and wind turbine. A method may include partially short-circuiting the armature windings by closing a first switch and inducing currents in the armature windings by the wind acting on the wind turbine blades.

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 wind turbine cooling system comprising a cooling circuit arranged to convey a cooling fluid to and from a heat source, a cooling device arranged to cool the cooling fluid, a 5 pump arranged to circulate the cooling fluid in the cooling circuit, and a cooling fluid tank arranged in fluid connection with the cooling circuit and having a first fluid port adjacent a top of the tank and a second fluid port adjacent a bottom of the tank, wherein the second fluid port is arranged to communicate with the cooling circuit, wherein the pump has an outlet arranged in fluid connection with the cooling circuit and in fluid 10 connection with the tank, and wherein a fluid path between the pump outlet and the tank includes a flow restriction device.

A cooler, having individual cooling elements (1) of stacked construction having ducts (25) extending in parallel to one another, each of which delimits a flow chamber (29) for the throughflow of a liquid medium to be cooled, between which at least two layers (3, 5) of individual rows of meandering fins (34) extend, which for the throughflow of air jointly delimit a further flow chamber (26, 28) each, is characterized in that the respective one flow chamber (29), free of obstacles, permits a laminar flow of the liquid medium through the assignable duct (25) in one throughflow direction, in that the height (H1) of each fin (34), viewed transversely to the direction of throughflow of the liquid medium, has at least the same height as the free throughflow cross section of the flow chamber (29) of the adjacently arranged duct (25), viewed in parallel to the extension of the respective fin (34), and in that in every layer (3, 5), a plurality of rows (36) of several fins (34) are arranged in succession, which each viewed in the direction of throughflow of the duct (25) are offset from each other.

A turbo fluid machine includes a housing, a rotating member, and a motor. Part of fluid compressed by a compressor impeller is introduced into a motor accommodation space through an inlet-side flow passage that has an inlet-side fixed throttle, and is discharged from the motor accommodation space through an outlet-side flow passage that has an outlet-side fixed throttle. The outlet-side flow passage includes a connection part connecting to the motor accommodation space. The connection part is formed separately from a clearance between a second partition wall and a shaft, and is located opposite to a connection part of the inlet-side flow passage connecting to the motor accommodation space across the motor in an axial direction of the shaft. The inlet-side fixed throttle and the outlet-side fixed throttle are configured such that pressure in the motor accommodation space is higher than pressure in a turbine-wheel back pressure region.

A multisiphon passive cooling system includes a heat exchanger thermally connected to a heat-generating component located within an enclosure, a distribution manifold located below the heat exchanger, a condensing unit located external to the enclosure and above the heat exchanger, and a first conduit thermally connected to the heat exchanger. The first conduit is fluidly connected to the distribution manifold and the condensing unit. The cooling system also includes a second conduit fluidly connected to the condensing unit and the distribution manifold, a liquid bridge fluidly connected to the first conduit and the second conduit or the distribution manifold, and a two-phase cooling medium that circulates through a loop defined by the first conduit, the liquid bridge, the condensing unit, the second conduit, the heat exchanger, and the distribution manifold. As such, the liquid bridge transfers the cooling medium in a liquid state from the first conduit to the second conduit or the distribution manifold.