A folding wave-energy-harvesting mechanism for an underwater vehicle includes an underwater-vehicle main body and a wave-energy-harvesting-device main body. The wave-energy-harvesting-device main body includes a hydrofoil assembly and a yaw assembly. The first state of the hydrofoil assembly is a folding state, and the second state is an unfolding state. The first state of the yaw assembly is the folding state, and the second state is the unfolding state. The wave-energy-harvesting-device main body further includes a driving assembly and an energy-storage assembly. The driving assembly is configured to switch the hydrofoil assembly and the yaw assembly in the first state and the second state to each other. The energy-storage assembly is configured to store the wave energy harvested by the hydrofoil assembly. When the hydrofoil assembly and the yaw assembly unfold, the hydrofoil assembly increases the efficient area for wave-energy harvesting.

A fixed permeable breakwater which also serves as a wave power generating device is provided and includes a structure, a structure fixing device and a wave-activated generator set, the structure is connected with seabed through the structure fixing device, holes are arranged on an outer side of upper arc vertical walls of the structure, and spiral vane sets are placed in the holes; a spiral-gear generator is installed on the horizontal bearing plate, and waves push the spiral vane sets to rotate, and then push the spiral-gear generator to generate electricity. The breakwater can be applied to sea areas with deep water, large waves and complex terrain, while reducing the influence of waves and providing a stable water environment for the surrounding sea areas, it has good wave-absorbing performance, convert wave energy into electric energy, and effectively solve the power supply problem of port areas or island residents.

A wave-powered floating water pump apparatus comprises a housing operatively connected to a piston capable of reciprocating therein, and an exterior float. The housing interior defines a compression chamber including a compression chamber back valve. The compression chamber back valve opens when the apparatus descends in the ocean, and closes when the float lifts the apparatus. The piston comprises a piston shaft with a piston back valve therein, constructed and arranged to permit water which enters the piston shaft in response to water pressure from the compression chamber only to exit the top of the piston shaft at a higher elevation. A floating generator system for harnessing energy from ocean waves to produce usable electrical energy may include the pump, a water storage reservoir and a hydro-turbine. A system for purifying and desalinating water may include the pump, a semi-permeable membrane for reverse osmosis and a reservoir for purified water.

A wave-powered floating water pump apparatus comprises a housing operatively connected to a piston capable of reciprocating therein, and an exterior float. The housing interior defines a compression chamber including a compression chamber back valve. The compression chamber back valve opens when the apparatus descends in the ocean, and closes when the float lifts the apparatus. The piston comprises a piston shaft with a piston back valve therein, constructed and arranged to permit water which enters the piston shaft in response to water pressure from the compression chamber only to exit the top of the piston shaft at a higher elevation. A floating generator system for harnessing energy from ocean waves to produce usable electrical energy may include the pump, a water storage reservoir and a hydro-turbine. A system for purifying and desalinating water may include the pump, a semi-permeable membrane for reverse osmosis and a reservoir for purified water.

The present invention is a wave energy converter capable of extracting useful energy from ocean waves by utilizing finite depth of ocean waves, kinetic energy of flowing water and drag force of water that opposes the relative motion of the submerged body through the water, comprising two bodies attached to each other, wherein the buoyant body is moored to the seabed, and the fully submerged body is suspended from the buoyant body by vertical suspender cables, chains, ropes, other flexible lines, or a rigid frame, and placed at a depth of around one-half wavelength of the prevailing waves at the installation site, where the water is not affected by the surface wave action, therefore is still or relatively still.

The present invention is a wave energy converter capable of extracting useful energy from ocean waves by utilizing finite depth of ocean waves, kinetic energy of flowing water and drag force of water that opposes the relative motion of the submerged body through the water, comprising two bodies attached to each other, wherein the buoyant body is moored to the seabed, and the fully submerged body is suspended from the buoyant body by vertical suspender cables, chains, ropes, other flexible lines, or a rigid frame, and placed at a depth of around one-half wavelength of the prevailing waves at the installation site, where the water is not affected by the surface wave action, therefore is still or relatively still.

A direct air capture system for use in a body of water that has waves with wave motion. The system includes at least one module exposed to the waves. The relative motion between the module and the waves to draws air into the module. The system removes carbon dioxide from the air using a moisture swing absorbent to remove the carbon dioxide from the air. The removed carbon dioxide can be used for various purposes.

A direct air capture system for use in a body of water that has waves with wave motion. The system includes at least one module exposed to the waves. The relative motion between the module and the waves to draws air into the module. The system removes carbon dioxide from the air using a moisture swing absorbent to remove the carbon dioxide from the air. The removed carbon dioxide can be used for various purposes.

A point absorber wave energy converter is described. The converter uses a surface piercing float operably coupled to a water column tube extending downwardly from the surface piercing float, the tube being open at its bottom and being configured to accommodate a column of sea water therein. Air is trapped above that column within a plenum, the plenum being configured such that operably relative movement between the point absorber and the internal water column expands and compresses the trapped volume of air. That movement can be used to pump air through an open or a closed circuit power take off system. The open circuit power take-off system as described is suitable for other oscillating water column wave energy converters including both floating offshore and fixed shoreline installations.

Provided is a tank wave-current generation system with a rear-mounted outlet. The rear-mounted outlet and a rectifying device located below a tank are arranged, the rectifying device comprises a rectifying chamber and a built-in rectifying grid, one end of the rectifying chamber is communicated with a water collection tank, and the other end of the rectifying chamber is communicated with a bottom wall of a tank unit, an outlet in the bottom wall is located at a front end of a wave pushing direction of a wave generator, a current subjected to preliminary energy dissipation in the water collection tank is rectified into a smooth fluid through the rectifying grid and then a steady current is input into the tank, so that the current pushed by a wave pushing plate arranged on the wave generator is a steady current meeting a test requirement.