Systems and methods for capturing renewable energy are disclosed herein. An example system can include a concave receptacle configured to float on top of water, a turbine positioned centrally with the concave receptacle, a buoyancy control system having a pump and one or more vessels, a controller having a processor and memory for storing instructions, the processor executing the instructions to cause the buoyancy control system to submerge the concave receptacle under the water by filling the one or more vessels with a fluid using the pump and cause the buoyancy control system to release the fluid from the one or more vessels and allow the concave receptacle to travel upwardly so that water is directed into the turbine to produce electricity.

This invention relates to an arrangement to optimize the production of hydrogen, the arrangement comprising at least a solar energy unit (12) and a wave and/or tidal energy recovery system (2), which are arranged to produce renewable energy, a water purification unit (5) and an electrolysis unit (9), which is arranged to produce hydrogen from pure water produced by the water purification unit (5), and the electrolysis unit (9) and the water purification unit (5) are powered by the renewable energy produced by the solar energy unit (12) and the wave and/or tidal energy recovery system (2). The arrangement comprises a buffer unit (6), into which pure water is supplied from the water purification unit (5) during periods when the production of the renewable energy exceeds the need of energy of the electrolysis unit (9).

A water reservoir system for generating, accumulating, storing, and releasing electrical energy comprises a reservoir wall built in a shallow body of water such as a sea or an ocean with a height exceeding the outside water level by about 10-25 m, thereby defining an interior of the water reservoir. Excess electrical energy from other renewable sources of electricity such as wind, solar power, or supplied by a local power grid is used to operate water pumps to fill the interior of the water reservoir with water during times of peak supply of electricity. Water is drained from the water reservoir to the outside body of water and generates electrical energy by flowing over a plurality of water turbines, thereby generating electricity and supplementing electrical power for the local power grid during times of high demand. Additional interior sources of renewable energy may be used to supplement external sources of electrical power in operating the system of the invention.

Embodiments presented provide for a high efficiency electrical production system that utilizes a pump and windmill system to produce electrical energy through hydro power and wind action.

A wave energy converter is disclosed which includes a V-shaped floating frame having a first section and a second section that is narrower than the first section so as to form a V-shaped structure which is hollow in the middle, an anchor base mounted at the bottom of the sea and connected to the V-shaped floating frame at the first end by a set of chords, a first bucket turbine and a second bucket turbine placed in the hollow section and connected to second section so that they are partially submerged in the sea, and an electricity converting assembly operable to receive and convert energy generated by both first bucket turbine and said second bucket turbine into electricity.

Embodiments presented provide for a high efficiency electrical production system that utilizes a pump and windmill system to produce electrical energy through hydro power and wind action.

This invention relates to an ultimate renewable energy machine, all-depth offshore turbine system and hybrid VTOL jet engines, the turbine system is a volume-based power system (Kw/MA∧3) instead of the current area-based power system (Kw/M∧2) and has a top wind turbine subsystem, a middle wave turbine subsystem and a bottom tidal turbine subsystem with the efficiency beyond Betz limit 59%, the turbine system includes a disrupt turbo-technology with robust shaft-less twin rotors and breakthrough dual-power zone blades to harness ocean energy in a synergic manner or individually, this system has all-season safety features for bird, marine life, human, and itself, is modularized and scalable for low LCOE<$0.10 kWh and provides reliable powers for 24/7, it represents a new era of renewable energy revolution leaded by this quintessentially American technology, as the ultimate fossil energy alternative.

A pumped storage hydroelectric system may include a reservoir system including an upper reservoir system and a lower reservoir system. At least one of the upper reservoir system and the lower reservoir system may include a modular reservoir arrangement. A penstock may be coupled with the upper reservoir system. A pump/turbine may be coupled with the penstock and with the lower reservoir system. The pump/turbine may be configured to receive water flowing from the upper reservoir system to the lower reservoir system for generating electrical power, and to pump water from the lower reservoir system to the upper reservoir system for storing energy.

The present invention relates to a wind turbine tower comprising a tower vibration damper (100) with a tuned mass damper and one or more impact damping units (113, 114, 115, 200, 300, 400). The tuned mass damper comprises a pendulum structure (101, 208), a chamber connecting a friction media (112) to the pendulum structure (101, 208) is at least partly immersed, and a suspension arrangement (103-111) suspending the pendulum structure (101, 208) inside the wind turbine tower such that the pendulum structure (101) is allowed to displace from a neutral position towards the outer boundary (102) of the chamber. The impact damping units (113, 114, 115, 200, 300, 400) are positioned between the pendulum structure (101, 208) and the outer boundary (102), such that the outer boundary (102) of the chamber and the pendulum structure (101, 208) may collide via the impact damping units (113, 114, 115, 200, 300, 400).

Provided is a busbar arrangement for a wind turbine generator, the wind turbine generator including a stator and a rotor arranged to rotate around an axis. The busbar arrangement includes a plurality of busbars for transporting electric power away from the generator, wherein each busbar is arranged at an individual radial distance from the axis and at an individual axial position along the axis. Furthermore, a wind turbine and a method of manufacturing a busbar arrangement is provided.