An energy conversion device for converting water energy, in some cases water energy from waves and/or a flow such as an ocean current, into electric energy, comprises at least one rotor having a rotor rotational axis, the alignment of which is in some cases fixed by a supporting frame, and a flow housing which comprises a rotor shell which surrounds the rotor radially to the rotor rotational axis.

A linear-motion guiding device is disposed on the wall of the container. The wind turbine includes, at the lower end of the support column, a support-column lower end member capable of being fixed to the linear-motion guiding device. A slider of the linear-motion guiding device is provided with a guide member, and a bolt is inserted through a bolt insertion hole in the support-column lower end member and is screwed into a threaded hole in the guide member. The apparatus includes an attachment guide part including a stepped bolt and a flanged step part, the attachment guide part being configured to guide the support-column lower end member to a position and an attitude in which the bolt insertion hole in the support-column lower end member is aligned with the threaded hole in the guide member when the support-column lower end member is not fixed to the slider.

An adjustable multi-functional bottom-hinged flap-type wave energy utilization device includes at least three wave energy conversion devices arranged in parallel and with adjustable spacing. Each wave energy conversion device includes a wave energy conversion component, a direction adjustment component for adjusting a wave-facing direction of the wave energy conversion component, and a height adjustment component for adjusting a height of the wave energy conversion component. The wave energy conversion component includes a mounting base plate, a transmission shaft arranged on the mounting base plate, a wave energy flap that can drive the transmission shaft to rotate, a generator connected to the transmission shaft, a hydraulic oil cylinder positioned on a back surface of the flap for pushing the flap to reset, and a wave monitor arranged on the mounting base plate for monitoring a draught and a wave direction angle of the flap.

A stowable generator device including a housing defining at least one storage chamber having an opening. A closure element is configured to selectively cover and uncover the opening. Support structure is disposed within the storage chamber in a collapsed position and is selectively extendable through the opening into an expanded position when the closure element is moved away from the opening. At least one energy generating unit is connected to the support structure. The support structure and the generating unit are configured to reversibly stow inside the housing in the collapsed position.

Power can be efficiently generated in accordance with the amount of water in a channel by including: a first headrace channel positioned on an upstream side; a second headrace channel positioned on a downstream side; a water wheel on a most downstream side of the first headrace channel and the second headrace channel, the water wheel having a rotation shaft in a direction orthogonally intersecting with a water flow; a lateral movement apparatus that enables the second headrace channel to be moved in an upstream direction or a downstream direction; and a vertical movement apparatus that enables the water wheel to be moved in a vertical direction.

A continuous fluid flow power generator includes an electrical generator with submersible turbine blades in communication with a flow of fluid in a body of water to generate electricity. The generator may include a water tower and a hydro turbine generator to generate electricity through kinetic actions; a float and piston assembly activated by wave action to deliver water to the water tower; kick turbines to create water flow to the water tower through submersible pumps; and a rechargeable battery in communication with the electrical generator and the hydro turbine generator. The generator may also include solar assemblies and windmills to provide supplemental electricity generation for charging the rechargeable battery. The generator may be connectable to a battery bank aboard a vessel or to an electrical grid.

Proposed are a fluid power generator which can enhance power generation efficiency by efficiently using the drag force of wind without increasing the size of blades, and a power generation system comprising the same. The fluid power generator includes: an ascending air current-forming body provided at a rotary shaft; a plurality of spiral blades which are spirally formed along the outer circumferential surface of the ascending air current-forming body; and a generator which generates electricity by rotation of the ascending air current-forming body.

Provided is an eco-friendly wind power generation apparatus that can perform power generation using wind by providing the blades of a wind power generator on a jib of a tower crane, and can perform wind power generation at the optimum altitude and in the optimum direction by automatically or manually performing the lifting or lowering and swing operation of a jib even when wind speed is insufficient because wind is not blowing, or perform wind power generation using artificial wind power generated by the operation of the jib, thereby generating a lot of electricity in necessary places and supply the electricity to all industrial sectors regardless of location and environment.

Energy is harvesting from fluids with different densities, such as water (34) and air (38) with a rotor (12) that is selectively above and below a water surface (30). The rotor (12) has cavities (31,32) inside tubes (18) with apertures (24) in walls (22) of the tubes (18). In a submerged mode, with the rotor (12) in the water (34), air is trapped in tubes (18) on one side of the rotor (12), which has apertures (24) facing down and air is released from the tubes (18) on the opposite side of the rotor (12), which has apertures (24) facing up. The opposite happens in an elevated mode.

An adjustable multi-functional bottom-hinged flap-type wave energy utilization device includes at least three wave energy conversion devices arranged in parallel and with adjustable spacing. Each wave energy conversion device includes a wave energy conversion component, a direction adjustment component for adjusting a wave-facing direction of the wave energy conversion component, and a height adjustment component for adjusting a height of the wave energy conversion component. The wave energy conversion component includes a mounting base plate, a transmission shaft arranged on the mounting base plate, a wave energy flap that can drive the transmission shaft to rotate, a generator connected to the transmission shaft, a hydraulic oil cylinder positioned on a back surface of the flap for pushing the flap to reset, and a wave monitor arranged on the mounting base plate for monitoring a draught and a wave direction angle of the flap.