A wave energy production apparatus for producing energy from the heave motion of the surface of a body of water. It has one or more compression module which comprises a piston and a cylinder assembly and a reciprocating assembly positioned around the compression module, which is operatively connected to cylinder, such that, in Generation Mode, reciprocates together with the cylinder relative to the piston of the compression module due to the movement caused by the heave and sinking movement of the surface of the body of water. The reciprocating assembly comprises at least one first weight changing mechanism comprising one or more dynamic compensation tank, which has at least one aperture with a closure configured to open and establish fluid communication between the dynamic compensation tank and the body of water in order to allow water to at least partially flood the dynamic compensation tank when the water surface rises or heaves and the reciprocating assembly moves upward relative to the piston and to close fluid communication between the dynamic compensation tank and the body of water and retain water inside the dynamic compensation tank when the water surface sinks and the reciprocating assembly moves downwards relative to the piston, wherein the cylinder of the compression module are configured to contain a fluid that is energised by the reciprocating movement of the cylinder, in Generation Mode, and said energised fluid is used to produce a fluid pressure that is eventually converted in electric energy.

The invention relates to a wave driven electrical generator having a single panel, or an array of panels that may be triangular in shape or may have another shape. A movable connection is provided between the panels to allow relative movement in two dimension or three dimensions. The movable connection may include at least one panel link has a length that is at least as long as the width of the panels to facilitate stacking of the panels for storage. One or multiple generators may be mounted on each panel and may be housed in a cavity where it is protected from damage and/or exposure to water. The area of coverage of a panel array includes open areas within the array of panels that define less than 20% of the area of coverage thereby facilitating the generation of maximum amount of power with a relatively small footprint.

The invention comprises a hydraulic pump, wherein wave energy is used to pump a fluid. The apparatus utilizes the oscillation of the free surface of a water column within a moon pool on a floating vessel to lift a floating pump unit. After reaching a peak elevation induced by a passing wave, the gravitational forces on the floater pressurizes and moves a fluid using structurally linked pistons within fixed cylinders on the vessel during the downward return motion of the floater. The pressurized fluid can then be used in a variety of applications including the generation of electricity via hydroelectric turbines.

Disclosed is a novel method, process, and system (hereinafter method or process) for deploying, stationing, and translocating buoyant wind- and wave-energy converters and/or other buoyant structures or devices, as well as farms of same. Also disclosed is a novel apparatus and/or machine comprising a farm of buoyant wave energy converters deployed by said method and/or configured to be deployed by said method.

A shutter valve for alternatingly allowing and stopping a high pressure water flow, such as in a device for generating energy from sea waves, comprising a tube section (201) having a rectangular cross section, wherein a multitude of vanes (202) are rotatably mounted in the tube section (201), wherein the vanes have a relatively large rectangular longitudinal cross section in a first direction, a relatively flat rectangular longitudinal cross section in a second direction perpendicular to said first direction, and a generally flat cross section in a third direction perpendicular to said first and second directions, said third direction being the axis of the vane (202), wherein the circumferential wall around the axis of each vane forms a closed water impermeable surface, wherein the axes of said multitude of vanes all extend in a parallel manner, characterized in that the distances between the axes of adjacent vanes are approximately half the distance between the outer tips of the vanes, seen in the cross section in said third direction, such that when the vanes are rotated to the closed position the lower half of the front surfaces and upper half of the back surfaces of all vanes form a single closed front surface and a single closed back surface, each in substantially a single flat plane perpendicular to the flow axis of the valve, said surfaces closing the opening of said tube section, and the other half of said front surfaces and the other half of said back surfaces of said vanes rest against each other.

A wave energy converter includes a buoyant body and an acceleration tube with a working cylinder and working piston movable therein, a mooring system, and at least one energy collecting device including a differential cylinder having an internal pump piston connected to the working piston via a piston rod. The differential cylinder includes a pumping chamber and an annular pumping chamber. When decreasing volume of the annular gap-shaped pumping chamber, the pump piston expels hydraulic fluid from the pumping chamber toward the pressure accumulator and draws hydraulic fluid from the fluid tank into the substantially cylindrical pumping chamber. During a working stroke causing a decrease in volume of the substantially cylindrical pumping chamber, the pump piston causes hydraulic fluid to bypass the pump piston through a fluid connection from the substantially cylindrical pumping chamber into the annular gap-shaped pumping chamber and further in a direction toward the pressure accumulator.

An adaptive hydraulic pressure generator is provided for systems in which the mechanical force producing energy varies significantly, especially for wave energy systems. The pressure generator includes at least two fluid chambers with a piston surface/displacement surface arranged to reciprocate with the fluid chamber, whereby the piston surface/displacement surface acts on the fluid in the chamber by means of the said mutual reciprocating movement. The pressure generator is equipped with a control system which is arranged to connect the chambers to each other and/or to different pressure ducts in such a way that the effective area of the piston/displacement surfaces changes in accordance with the changes in the driving force exerted on the piston/displacement surfaces and/or the body forming the fluid chamber in such a way that the pressure produced by the pressure generator in the fluid supplied to the application exceeds the threshold pressure.

The modular platform for offshore constructions, composed of more than two separate buoyancy elements partially immersed in water, which move along with the water wave movement and which, in the part above the water level, are connected to the structural elements forming a rigid horizontal spatial structure, characterized in that the buoyancy element (1) is given the shape of a cuboid or cylinder having at least one vertical hollow (2) to accommodate the structural element, i.e. piston (3), which forms the axis along which the buoyancy element (1) moves, and which is connected to the horizontal structural element (4) fitted to take external loads.

A system and method for moving water up a water column to achieve a sufficient pressure to overcome a reverse osmosis filter. The system includes a rigid outer column for receiving and holding water, with an inner, deformable hose located inside the rigid outer column. The hose has a one-way valve at a distal end of the hose to allow water to enter the hose and an outlet at the proximal end of the hose to allow water to exit the hose. A water-raising device to raise the water within the inner, deformable can include a system that moves sections of water within an inner lumen using a peristaltic motion to drive water upwardly through the inner lumen.

There is provided a power generation device that generates electricity using a potential energy of a fluid raised to a predetermined height position by a wave force, the device including: a housing (1) that floats, the housing (1) including a front side opening portion (16) for taking a wave into an inside of the housing (1) on a front side of the housing (1); a float accommodated in the housing (1); a feeding device that feeds the circulation fluid toward the predetermined height position based on a wave force received by the float due to the wave taken into the inside of the housing (1) through the front side opening portion (16); a power generation unit that generates the electricity; and a suppressing member that suppresses a swing of the housing (1).