Wind turbine ice protection systems and methods are provided. An ice protection system for heating a wind turbine blade includes: a heater disposed in an interior of the wind turbine blade, the heater for heating air; a blower disposed in the interior of the wind turbine blade and for moving the air across the heater to generate a heated airflow; a duct disposed in the interior of the wind turbine blade, the duct for receiving the heated airflow and releasing the heated airflow into the interior of the wind turbine blade; and an electrical control subsystem disposed in the wind turbine for controlling one or more components of the ice protection system.

The present invention relates to a fluid compressor comprising: a driving module comprising a driving motor embedded in a motor case; and a compression module comprising a rotor, which is rotatably driven by a driving motor and which has a plurality of variable blades radially provided along the outer peripheral surface thereof, a rotor housing for encompassing the rotor, and a cover of the rotor, for closing the rotor housing, wherein the compression modules are stacked and airtight to block contact between fluid passing through the compression module and air outside the compression module, so that the fluid flowing into any one compression module sequentially passes through the remaining compression modules. The rotary shafts provided in each center of the rotors are connected a shaft coupler. The present invention simultaneously achieves a high-efficiency compression ratio and reduces noise caused by the excessive velocity of any compression module.

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.

Provided is a method for operating a wind turbine having a generator and a rotor with rotor blades. The method includes generating electrical power from wind using the generator, using a first part of the generated power as an auxiliary component for supplying auxiliary devices of the turbine used for operating the turbine, where the auxiliary component varies up to a limit. The method includes feeding a second part of the generated electrical power into a grid as a feed-in component, checking the grid for a grid fault that does not allow feeding power into the grid and continuing the operation of the turbine when the fault is detected. The generation of power from wind is reduced to a cut-back power that corresponds to the limit the auxiliary component for operating the auxiliary devices is used from the cut-back power and remaining residual power of the cut-back power is consumed.

A multi-outlet fluid pump includes a housing, a motorized pump, an electrical power supply, and a self-locking thermal cutoff. In one form, the pump includes a first or primary thermal cutoff and a second or secondary thermal cutoff to prevent the pump from operating once a thermal cutoff has deactivated the pump until a user or operator has taken some affirmative action. Related methods are also disclosed herein. In some forms an indicator is provided to indicate if the thermal cutoff has disabled the pump to alert a user as to the need to unplug or reset the pump before operating the pump again.

A wind turbine, in particular an offshore wind turbine includes at least one hollow structural element, at least one cable inlet arranged in a bottom region of the hollow structural element. A first platform is arranged inside the hollow structural element, above the bottom region. At least one flow opening is arranged in the shell surface of the hollow structural element and penetrating the shell surface. At least one active control element is flow-connected to the flow opening to affect a media exchange between the interior of the hollow structural element and the exterior of the hollow structural element.

The present invention relates to improving the efficiency of a helical fan/pump/propeller/turbine such as is described in PCT/NZ2018/050010. Further to the discovery that specific longitudinal limits are critical to define the first opening in relation to the helical fan/pump/propeller/turbine, it was found that certain lateral limits are also critical. Thus the configuration of the first opening and the helical blade cooperate according to both longitudinal and lateral limits to improve results. This was found to be the case in many applications whether the rotor is mechanically rotated or rotated by an external energy such as wind. In fact, common features such as this can enable the invention to switch between applications in some cases. The present invention also relates to a second opening longitudinally offset from the intake opening and an elongate stator extending from the rotor that is shaped according to the desired flow path

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 fan includes a frame, an impeller and a motor. The impeller includes a hub, a plurality of blades, first air-guiding plates and second air-guiding plates. The hub has a tapered shape. A width of the hub gradually increases along a direction from a top portion of the hub to a bottom portion of the hub. The hub has at least an air vent. The blades are disposed around an outer periphery of the hub. The first air-guiding plates and the second air-guiding plates are disposed around an inner periphery of the hub. The first air-guiding plates are arranged between two of the second air-guiding plates in staggered. The second air-guiding plates are arranged between two of the first air-guiding plates in staggered. The first air-guiding plates and the second air-guiding plates have different thicknesses, heights or shapes.

The invention relates to a device for thermoelectric storage or energy conversion, reducing the complexity, the thermodynamic irreversibilities and the costs of previous solutions.

The device consists of main pressurized tanks (1THERMO) (1TRANSIT), containing the hydraulic fluid (3), the propellant fluid (2), liquid communications (7), equipped with hydroelectric conversion assemblies for pumping (6) or turbining (5) and including heat exchange systems (8COND) (8EVAP).

The device may include mobile physical separations (11) between fluids, hot (15), or cold (16) thermal reserves, secondary tanks (13) equipped with pipes (14).

The device is intended for energy storage, in particular intermittent renewable energies, economical production of Cold and Hot, and net electricity generation exploiting weak thermal sources.