Disclosed is a wave energy power generation apparatus, comprising a plurality of wave energy collecting units. Each of the wave collecting units comprises: a potential energy collecting assembly used for collecting wave potential energy, a kinetic energy collecting assembly used for collecting wave kinetic energy and a positioning assembly used for vertically limiting and horizontally positioning buoyancy compartments. The apparatus is beneficial for improving the collection efficiency of wave energy, and simultaneously can satisfy the purposes of long-term safe and stable operation, of being adapted for scaled construction.

A water wheel turbine for generating power from a water current in a body of water, comprising multiple water wheels. The wheels have paddles, which have wings that channel the water current to a successive row of paddles on an adjacent wheel. The wings of the waterwheels work as self-barrier and director of the water current, reducing turbulence flow within the device. The gaps between the wings with the adjacent rear paddle do not create a significant resistance in the water current in front of the device compared with other waterwheel turbines. The device may operate in a body of water where it can be fixed or floating over a flume rigid foundation or over barrage foundation.

Various arrangements of a turbine for a rotating coalescer element of a crankcase ventilation system for an internal combustion engine are described. In some arrangements, the turbine is an impulse turbine, which is also known as a pelton turbine or a turgo turbine. The turbine is used to convert hydraulic power from a stream of pressurized fluid to mechanical power that is used to drive the rotating element. The turbine includes a non-wetting surface (e.g., an oleophobic or hydrophobic surface) that repels the pressurized fluid. The non-wetting surface may be achieved through plasma coating, fluoropolymer coating, micro-topography features, and the like. The non-wetting surface increases the power transmission efficiency from the stream of pressurized fluid to the turbine, thereby increasing the rotational speed of the rotating element compared to wettable surfaced turbines, which in turn increases the efficiency of the rotating element.

Embodiments include a hydroelectric system including a module having a protective housing, a turbine housing retained within the protective housing, the turbine housing including an inlet portion at a first end, a substantially tubular portion, and an outlet portion at a second end, a turbine retained at least partially within the turbine housing, the turbine including a plurality of blades coupled with a central shaft, and a hydraulic pump, the hydraulic pump being coupled with the central shaft, where the hydraulic pump is configured to pump a high pressure liquid, and an artificial barrier, the module being coupled to a downstream surface of the artificial barrier, where the artificial barrier defines a cutout having an inlet portion, an outlet portion, and a channel fluidly coupled with the turbine housing of the module.

Disclosed is a wave energy power generation apparatus, comprising a plurality of wave energy collecting units. Each of the wave collecting units comprises: a potential energy collecting assembly used for collecting wave potential energy, a kinetic energy collecting assembly used for collecting wave kinetic energy and a positioning assembly used for vertically limiting and horizontally positioning buoyancy compartments. The apparatus is beneficial for improving the collection efficiency of wave energy, and simultaneously can satisfy the purposes of long-term safe and stable operation, of being adapted for scaled construction.

A water flow turbine arrangement is disclosed which can be used for capturing energy from water flows. The arrangement comprises: a base member (212): a generally open support structure (210) mounted to the base and upstanding therefrom, the support structure including plural legs (216) joined by a cross brace at or adjacent their upper ends; an electrical generator (230) mounted to the base; and shaft mounted turbine blades (220) mounted for rotation generally within the space occupied by the legs about a turbine axis. The turbine shaft (222) is supported at its upper end by the cross brace and is coupled to the generator at its lower end by a magnetic torque transmitting coupling, allowing complete fluid sealing of the generator's housing.

An energy conversion device includes a plurality of cross flow turbines, each one including fixed curved blades arranged in squirrel cage configuration about an axis of rotation. The turbines are mounted on a floating support on the water, placed directly in the fluid flow and arranged successively one after another with their axes parallel to each other and perpendicular to the flow.

A structural duct apparatus includes a cross flow turbine for use in a fluid flow. The turbine has at least one straight vertical aerofoil blade and at least one helical aerofoil blade slanted toward the direction of rotation. Inner and outer walls of the duct apparatus provide an inner diffuser flow passageway that houses turbine power take off modules with the outer surfaces of the duct influencing flow direction so that where there are at least two ducts an open flow barrage is advantageously formed.

Disclosed herein are linear hydraulic turbines in which the linear machine converts the majority of available energy in the flowing water into useful torque directly in the runner, leaving the outflow with very little velocity.