Apparatus for the generation of pressure waves for seismic surveys in marine environment comprising a cylinder (3), defining an axis, in which a striker piston (1) and a pump piston (2) are situated, each having two respective opposite sides with respect to said axis, of which a side of the striker piston (1) situated in front of the pump piston (2) is defined first impact side, and a side of the pump piston (2) in front of the striker piston (1) is defined second impact side, the pump piston (2) and the striker piston (1) sliding in the cylinder (3) in a direction parallel to the axis, and the pump piston (2) and striker piston (1) being such as to strike against each other, by means of the first and the second impact sides, the striker piston (1) being driven by activation means pressing on the side opposite to its own impact side, wherein the cylinder (3) comprises, at one of its ends, a chamber (15) having a diameter larger, smaller or equal to that of the portion of cylinder (3) in which the striker piston (1) is housed, wherein in said chamber (15) a part of the pump piston (2) can slide, communication passages which connect the chamber (15) with the water of the marine environment (10), so as to transmit an impulse generated by said impact to the marine environment.

The present disclosure relates to energy storage. The teachings thereof may be embodied in a device and/or a method for storing electricity. For example a device for storing energy may include: a first vessel having a first holding space; a separating apparatus dividing the first holding space into a first chamber for holding a first medium and a second chamber for holding a gas phase; the separating apparatus movable to cause a simultaneous change in volume of the first chamber and the second chamber; a second vessel with a second holding space exchanging mass transfer of the gas phase in the second chamber; a temperature-control apparatus supplying or removing heat energy to the second vessel; a conveying apparatus conveying the medium into the first chamber; and an expansion apparatus driven by the medium.

An ocean current electric power generator includes a mechanical brake that restricts a rotation of a rotor shaft of a rotatable wing, and a power transmission mechanism that is disposed between the rotor shaft and an electric power generator. The power transmission mechanism includes a switching section that switches between a power transmission state and a power disconnection state, a load application section that applies a rotation load on the rotor shaft during the power disconnection state, and a speed varying section that varies a revolution speed of the rotor shaft, and transmits the revolution to the electric power generator during the power transmission state.

Aspects of the disclosure provide a power conversion system and a method for conversing power. The power conversion system includes a first fluid holding tank, a second fluid holding tank, a fluid inlet hose, a fluid outlet hose, a fluid container, and one or more tension springs connected to the upper surface of the container and to a lower surface of the first fluid holding tank. The power conversion system further includes a rotational component connected to a lower side of the container via a connecting rod. The power conversion system further includes a generator connected to the rotational component via a horizontal shaft. The power conversion system further includes a feedback hose connected between the second fluid holding tank and the first fluid holding tank. The power conversion system further includes a hydraulic pump connected to the second fluid holding tank.

An electromagnetic turbine system includes a circulation system for recirculating fluid that drives turbine impellers for electromagnetic turbine modules. The circulation system includes a fluid separator module which separates gas from liquid and circulates the liquid back to a pressure chamber. The liquid in the pressure chamber is propel by compressed gas. Multiple pressure chambers may be controlled to release pressurized fluid to drive their respective shafts on a staggered timing sequence. The turbine modules may be levitated from a supporting surface to reduce friction.

A hydro-turbine apparatus (1) comprising a turbine (9), a water collection chamber (11), a water inlet, at least one water injector (10) directed towards the turbine so as to provide a driving force to the turbine, wherein the water inlet in communication with the at least one water injector, and the water collection chamber arranged to receive water which has been directed at the turbine, and the apparatus arranged for operative submersion in a body of water (WL).

The present disclosure belongs to the technical field of new energy utilization, and provides an offshore oscillating water column wave energy conversion device with an external permeable structure. The offshore oscillating water column wave energy conversion device with the external permeable structure comprises an oscillating water column system, an anchoring fixing system and a permeable structure. According to the offshore oscillating water column wave energy conversion device with the external permeable structure provided by the present disclosure, the offshore oscillating water column wave energy conversion device and the permeable structure are effectively combined. Using an offshore floating structure, the offshore oscillating water column wave energy conversion device with the external permeable structure can be applied to deep and far sea areas with higher wave energy density, and the output power of the device can be effectively improved.

The present disclosure belongs to the technical field of new energy utilization, and provides an offshore oscillating water column wave energy conversion device with an external permeable structure. The offshore oscillating water column wave energy conversion device with the external permeable structure comprises an oscillating water column system, an anchoring fixing system and a permeable structure. According to the offshore oscillating water column wave energy conversion device with the external permeable structure provided by the present disclosure, the offshore oscillating water column wave energy conversion device and the permeable structure are effectively combined. Using an offshore floating structure, the offshore oscillating water column wave energy conversion device with the external permeable structure can be applied to deep and far sea areas with higher wave energy density, and the output power of the device can be effectively improved.

A System for Electricity Generation Using Heat Pump and Hydro Turbine, having very high efficiency is disclosed herein. The said system comprises Circular pipes arranged in rectangular pattern to form close circuit of water (10), water pump (1)attached to first end of said closed circuit (10), heat pump, hydraulic turbines (T1(3), T2(4) and T3(5)) placed at other three corners of the closed circuit (10), heater (2). Present invention uses pressure raised after low temperature heating of water in closed circuit (10) for energy generation. The hydraulic turbines are used to capture pressure generated in the closed circuit (10) and to convert it in mechanical work. As system works on low temperature it avoids huge losses of heat energy occurring at currently available mechanisms. The system is simple in construction, compact, low in capital cost, suitable for operation with local water and over a wide range of climatic conditions.

A convective power generation device is described based on thermal convection and thermal input energy. The energy generation device operates by heating wax and oil by heat from a solar concentrator or geothermal energy; as the weight of the wax becomes liquid that is lighter than the oil, the liquid wax moves up through a pathway; when the liquid wax reaches the top of the pathway, the cooler wax falls towards collecting cups mounted to a continuous belt and forces the belt downward to rotate the belt; when a collector cup of wax reaches the bottom of belt rotation, the wax falls to a reservoir; and the rotation of the belt drives a gearbox, which drives a generator to produce electric power. The convective power generation device has been shown to have higher energy conversion efficiency than photovoltaics.