A wind turbine rotor blade, with a length, a rotor blade root, a rotor blade tip, a pressure side, a suction side, a leading edge, a trailing edge, and an air guide for heated air to guide heated air inside of the rotor blade and along a longitudinal direction of the rotor blade from the rotor blade root in the direction of the rotor blade tip. The wind turbine rotor blade additionally comprises at least one aerodynamic mixer in the area of the air guide. The invention further relates to a wind turbine with at least one wind turbine rotor blade.

A fluid control device (1) includes a case (21) including a case top plate, a case side plate, and a case bottom plate and having an internal space (59) and a cavity, a pump (11) provided at a position at which the pump (11) divides the internal space (59) into a bottom-plate-side region and a top-plate-side region, the pump (11) being configured to generate a flow of a fluid between the bottom-plate-side region and the top-plate-side region and control the flow direction of the fluid, and a fixing member (31) that fixes the case (21) in place. The case (21) is mounted on the fixing member (31) by using the case top plate or the case bottom plate as a mounting surface (B).

A centrifugal compressor operable in a wide operation range under a condition accompanied with pulsations of a pressure and a flow rate. The centrifugal compressor has a casing including at least one recirculation channel that includes a first inlet slit connected to an air flow passage on a downstream side of a leading edge in an air flow direction of the air flow passage, a second inlet slit connected to the air flow passage on a downstream side of the first inlet slit in the air flow direction of the air flow passage, a first vane disposed on a downstream side of the first inlet slit or in the first inlet slit in the at least one recirculation channel, and a second vane disposed on a downstream side of the second inlet slit or in the second inlet slit in the at least one recirculation channel.

An improved wind turbine device of present invention provides continues rotation of propeller and prevents stopping or critical slowing of the propeller of the turbine that causes damage to the bearing and gear assembly and shortens the life of the turbine. The wind turbine device or system of present invention is comprising of a novel hollow propeller blades having a pair of reservoirs at the top and bottom of the propeller blades and a hydraulic pump configured between the reservoirs within the hollow propeller blades along with the wireless control unit that commands the pump to manipulate the fluid present within the reservoirs to create an imbalance within the hollow propeller causing the hollow propeller to keep from stopping. Also, the wireless control unit commands the pump to manipulate the fluid of the reservoirs in reverse direction in high wind condition to prevent the propeller from rotating excessively that may cause damage and loss of electricity.

A wind turbine arrangement including a first rotatable blade arrangement and a second rotatable blade arrangement. The first blade arrangement forms part of a first wind turbine, and the second blade arrangement forms part of a second wind turbine. The second wind turbine can produce a rotative force to the first wind turbine. At wind speeds below that required to operate the first turbine, the second turbine may be operable and provide power to rotate the first turbine.

The present invention relates to an integrally supported cooling device for mounting to a wind turbine nacelle without a mounting frame, the wind turbine nacelle having a first face with a longitudinal extension in a wind direction, whereby the cooling device comprises at least one heat exchanger core configured to extend across the wind direction and to define a cooling area of the cooling device, the heat exchanger core having a first side and a second side arranged opposite the first side in relation to the heat exchanger core, a first manifold being arranged along the first side and a second manifold being arranged along the second side, each in fluid communication with the at least one heat exchanger core, the pair of manifolds extending parallel along the cooling area, whereby the second manifold comprises suspension means and the cooling device is adapted to be mounted to the wind turbine nacelle by suspension of the second manifold to the first face of the wind turbine nacelle via said suspension means.

A lubrication system for a drive train of a wind turbine including a gearbox is provided. The gearbox has a first stage with a first internal oil level and a second stage with a second internal oil level. The second internal oil level is at a geodetic higher level than the first internal oil level. The gearbox further includes a supply passage for supplying oil from the first stage to the second stage of the gearbox.

A combined gas-liquid two-phase energy storage and power generation system includes a compressed gas storage unit, a first gas pipeline, a liquid piston device, a hydraulic energy conversion unit and a first pumped power generation unit. The combined gas-liquid two-phase energy storage and power generation system connects the liquid piston device and a first port group of the hydraulic energy conversion unit and receives/outputs the hydraulic potential from/to the first port group, and connects the first pumped power generation unit with the second port group of the hydraulic energy conversion unit and receives/outputs the hydraulic potential from/to the second port group.

A jointed wind turbine rotor blade includes a first blade segment and a second blade segment. A chord-wise joint separates the first and second blade segments, wherein internal joint structure joins the first and second blade segments across the chord-wise joint. A first heating system is configured within the first blade segment, and a second heating system is configured within the second blade segment. A disconnectable coupling is configured between the first and second blade segments at the chord-wise joint to supply power or a fluid medium from the first blade segment across the chord-wise joint for use by the second heating system in the second blade segment.

A method of joining first and second blade components of a rotor blade of a wind turbine includes providing corresponding first and second positioning elements at an interface of the first and second blade components. The method also includes aligning and securing the first positioning element of the first blade component with the second positioning element of the second blade component so as to temporarily secure the first and second blade components together. Further, the corresponding first and second positioning elements maintain a desired spacing between the first and second blade components. Moreover, the method includes permanently securing the first and second blade components together such that the desired spacing is maintained between the first and second blade components.