A method for heating a wind turbine facility includes: charging a DC link of an electrical converter connected with a wind turbine of the wind turbine facility; heating air inside the wind turbine facility with heat generated by a voltage limiting unit interconnected with the DC link, which includes a resistor adapted for dissipating electrical energy into heat for reducing a voltage in the DC link, when the voltage is above a threshold voltage; wherein the voltage limiting unit is controlled, such that the voltage limiting unit generates heat according to settings defined in a controller of the voltage limiting unit. The heating settings are changed based upon commands from a user interface. Furthermore, the DC link is charged by a grid side converter of the wind turbine facility with power from an electrical grid.

An electric fan-type power generating device with low energy consumption includes a housing receiving an electric motor connected to a first fan. A generator is mounted in the housing and is connected to a second fan. The first and second fans are offset from each other. A power device includes a chargeable battery for supplying electricity to the electric motor that drives the first fan to generate wind power close to the second fan. Air flows around in a housing and generates turbulence to proceed with input and output of air, increasing the heat dissipating effect of the electric motor and the generator. Furthermore, the second fan drives the generator to generate electricity supplied to the chargeable battery. The chargeable battery recycles the electricity and supplies the electricity to the electric motor that operates to generate wind power. Furthermore, the wind energy drives the generator to continue generation of electricity.

A fluid mixing device includes a hollow tubular main body (41) to mix an exhaust gas (G4) and a warming gas (G5) within it, a first inflow port (43) provided in an upstream end portion of the main body (41) and through which the exhaust gas (G4) flows, a mixing promotion body (38) of a tubular shape disposed inside the main body (41) and having a longitudinal axis (C1) extending in a direction conforming to a direction of flow of the exhaust gas (G4), and a second inflow port (45) provided in a peripheral wall of the main body (41) and through which the warming gas (G5) flows towards an outer peripheral wall of the mixing promotion body (38). The exhaust gas (G4) flows outside and inside the mixing promotion body (38).

A flying object 20 is provided with a rotor blade 200 that generates lift and thrust by rotating and a rotating electrical machine unit that rotates the rotor blade 200. The rotor blade 200 receive wind power and rotate when not flying. The rotating electrical machine unit generates electric power based on a power that rotates the rotor blades 200 when not flying. In addition, the flying object 20 may be provided with a power storage device 230 that stores electric power generated by the rotating electrical machine unit. In addition, the flying object 20 may be provided with a detachably connected cartridge 260 that has a desired function.

The invention relates to a toroidal electric generator (100) comprising a stator (20), which includes a tubular body (21) supporting a plurality of windings (24), and a rotor (30) rotatable within the stator (20) and comprising a support element (31) and a plurality of hydraulic blades (32), each provided with a respective magnet (34) and mounted on the support element (31) integral to it. The toroidal electric generator (100) further comprises an external casing (40) and a plurality of separating elements (51, 52), each separating element being arranged between a respective pair of adjacent windings (24) of the plurality of windings (24) of the stator (20).

A waste air flow capture system, comprising: a) a cylindrical shroud configured to receive a waste air flow from a waste air flow channel of an HVAC compressor or a heat pump compressor and configured to vent the waste air flow received from the waste air flow channel of an HVAC compressor or a heat pump compressor; b) a first electrical generator configured to generate electricity when a first fan blade assembly rotates relative to the cylindrical shroud and/or a second electrical generator configured to generate electricity when a first fan blade assembly rotates relative to the cylindrical shroud; and d) a first fan blade assembly enclosed by the cylindrical shroud and coupled to the first electrical generator motor on a first side of the first fan blade assembly and coupled to the second electrical generator motor on a second side of the first fan blade assembly.

The present inventive concept provides for a method of harnessing artesian aquifer power. The method includes obtaining weather data and artesian aquifer data for a geolocation. Weather features and artesian aquifer features are extracted from the obtained weather data and artesian aquifer data, respectively. Compression and decompression events are predicted for water in an artesian well at the geolocation by mapping the weather features and the artesian aquifer features. A plurality of piezoelectric springs connected to the artesian well are modulated to maximize artesian aquifer energy harnessed based on the predicted compression and decompression events.

A system for controlling air flow is provided that includes a damper disposed on a duct, an energy recovery system disposed within the duct a first predetermined distance from the damper and a controller coupled to the damper by a conductor and to the energy recovery system, the controller disposed within the duct a second predetermined distance from the damper.

Various examples are provided for power generation using buoyancy-induced vortices. In one example, among others, a vortex generation system includes an array of hybrid vanes comprising a first vane section in a surface momentum boundary layer and a second vane section above the first vane section. The first vane section is configured to impart a first angular momentum on the preheated air in the surface momentum boundary layer and the second vane section is configured to impart a second angular momentum on preheated air drawn through the second vane section. In another embodiment, a method for power extraction from a buoyancy-induced vortex includes imparting angular momentum to preheated boundary layer air entrained by a thermal plume to form a stationary columnar vortex. The angular momentum can be imparted to the preheated boundary layer air at a plurality of angles by an array of hybrid vanes distributed about the thermal plume.

A method for harvesting energy through pressure retarded osmosis includes identifying and pumping both a low salinity feed stream and a high salinity feed stream from upstream water sources to opposite ends of a semi-permeable membrane housing where the low salinity feed stream permeates through the semi-permeable membrane to the high salinity feed stream to pressurize and dilute it. The diluted stream rotates a turbine to generate electricity and produce a depressurized mid-salinity fluid. A system for harvesting energy through pressure retarded osmosis has a first and second upstream water source pumped through low and high salinity feed lines to opposite ends of a semi-permeable membrane housing including a container, a semi-permeable membrane, a low salinity side of the housing, and a high salinity housing. The system also has a low salinity exit line and a pressurized mid-salinity exit line exiting opposite ends of the semi-permeable membrane housing, a turbine, a generator coupled to the turbine, and a depressurized mid-salinity exit line downstream of the turbine.