A vortex-induced vibration power generation device with a magnetic boundary structure, including upper and lower opposite groups of fixed sleeves. Each fixed sleeve includes two vertical sleeves. The vertical sleeves are hollow cavities, and include sealed ends and open ends. Rotating magnetic poles are arranged in the sealed ends of the vertical sleeves. Coil slots are formed in the inner walls of the vertical sleeves. Coil windings are mounted in the coil slots. The vortex-induced vibration power generation device further includes linear bearings. The end portions of the linear bearings are fixedly connected with the open ends of the vertical sleeves through flanges. A vibration mechanism includes a vibration rod and vibration guide rods fixedly connected with the vibration rod. Magnetic coil mounting slots and anti-falling rings are arranged on the vibration guide rods. Magnetic coils are mounted in the magnetic coil mounting slots.

This invention provides a rolling bearing protection device and a vertical-axis tidal current energy generating device applying the same. The vertical-axis tidal current energy generating device includes a frame, a vertical-axis hydraulic generator, a rolling bearing, and a rolling bearing protection device. The vertical-axis hydraulic generator includes a main shaft disposed vertical to a horizontal surface, one end of the main shaft is rotatably disposed at a bottom of the frame. The rolling bearing is sleeved on one end of the main shaft. The rolling bearing protection device is disposed above the rolling bearing. The rolling bearing protection device includes a first sealing protection device, a first water leak-proof chamber, and a second sealing protection device disposed in sequence along a gravity direction.

Systems and methods for use in capturing energy from natural resources. In one form, the systems and methods capture energy from natural resources, such as movement of fluid in a body of water, and convert it into electrical energy.

Undershot turbines with dynamic blades are disclosed for improving energy capture from a flowing stream. The blades are provided on respective rotatable swing arm assemblies attached to the circumference of a turbine support. In operation, the blades are uniquely adjusted as a function of rotation of the support wheel for improved efficiency and energy capture.

An example system comprises an enclosure submerged in a body of water. The system also comprises an intake port disposed along a periphery of the enclosure to transport water into the enclosure. The system also includes a turbine generator disposed inside the enclosure and coupled to the intake port to receive the water entering the enclosure through the intake port. The system also comprises a water storage tank coupled to the turbine generator to receive the water flowing out of the turbine generator. The system also comprises a pump coupled to the water storage tank to pump the water out of the water storage tank. The system also comprises a controller to control flow of the water into the enclosure by operating the intake port and to control flow of the water out of the enclosure by operating the pump.

A system for providing electric energy is provided, the system including: plural energy providing units, each energy providing unit including measurement equipment for measuring at least one operational parameter of the energy providing unit; at least one environmental sensor installed at or close to selected energy providing units, in particular arranged at a periphery, adapted to measure an environmental condition, in particular wind condition; a central controller communicatively connected with the energy providing units and adapted to at least one of: to supply virtual sensor data to the energy providing units based on the environmental condition; to control operation of the energy providing units based on measurement results received from the measurement equipment of each of the energy providing units and based on the environmental condition.

A system for providing electric energy is provided, the system including: plural energy providing units, each energy providing unit including measurement equipment for measuring at least one operational parameter of the energy providing unit; at least one environmental sensor installed at or close to selected energy providing units, in particular arranged at a periphery, adapted to measure an environmental condition, in particular wind condition; a central controller communicatively connected with the energy providing units and adapted to at least one of: to supply virtual sensor data to the energy providing units based on the environmental condition; to control operation of the energy providing units based on measurement results received from the measurement equipment of each of the energy providing units and based on the environmental condition.

A rotor (10) for a hydro-powered electricity generator. The rotor (10) includes a hub (12) and a plurality of blades (16). The hub (12) has a circular cross sectional shape and a longitudinal rotational axis (14). The plurality of blades (16) each have proximal root (16a) and a distal tip (16b). Each of the blade roots (16a) are mounted to the hub (12) at the widest part thereof (D1). The ratio between the diameter of the tips (16b) of the blades to the diameter of the widest part (D1) of the hub (12) is less than about 2:1.

A water-driven turbine has an elongated endless conveyor with down and up streaming straightaways connected by travel-reversing turns. Paddles mounted on the conveyor present high resistance to waterflow on the downstream straightaway and low resistance to waterflow or the atmosphere on the upstream straightaway, the differential allowing the flow of water to continuously drive the conveyor which is connected to a power take-off shaft facilitating connection to a variety of energy-harnessing systems. The turbine can be towed, self-driven or mooring line manipulated to a flow site and is operable in unidirectional flows such as rivers and reversing flows such as tides at depths from surface to bottom. The paddles can be mounted or changed on shore, at the flow site and anywhere in between. The turbine is efficient in low and high velocity water flow, not easily damaged by floating debris, cavitation free and fish, mammal and environmentally friendly.

An accelerated and/or redirected flow arrangement, optimally serving as a wildlife and/or debris excluder (WDE), is used in combination with a turbine-like device having an inlet end and an outlet end for fluid flowing therethrough, e.g., a hydro-turbine. The arrangement includes at least a forward part designed to be placed in front of a fluid inlet of a turbine-like device and configured to produce at least one of the following effects on the fluid: (a) imparting a re-direction of the fluid; and/or (b) accelerating the flow velocity of the fluid, as it flows through the forward part. Turbine-like devices having both a forward part and a rearward part of flow arrangement are disclosed, as well as a method of enhancing turbine performance.