A gravity motor using the potential energy of an initial mass located at a relative height. This potential energy can be converted into kinetic energy. This gravity motor comprises a storage bin (26) able to contain a quantity of fragmented material (39) and having a base (28) with a first chute (30) to take the fragmented material (39) out of the base (28), a second chute (34) with an exit (58) and a guiding cylinder (32) of the exit (58), a wheel (60) with vanes (61) that rotate a rotor (46). While rotating, each vane (61) can collect a volume of the fragmented material (39) and act as a torque around a central axis, thus causing the rotation of the wheel around the central axis, at a velocity corresponding to the kinetic energy of the volume of the fragmented material (39). The rotor (46) comprises means for articulated fastening to a machinery part.

A low-head impulse jet waterwheel for power generation at irrigation canal drop structures and navigation dam spillways achieves renewable electric power generation that has been lost until now due to lack of suitable equipment to convert such energy at competitive cost. Conventional practice has limited use of impulse turbines to heads of more than 50 meters or about 150 feet. However, there is now no need for such a limitation. Kinetic energy of a low-pressure jet is employed in a way that enables numerous locations to generate electricity conveniently near points of use, from a renewable source at minimum cost. The equipment can be pre-assembled for minimum installation cost at sites with no existing impoundment and can be automatically raised clear of flood levels with built-in lifting equipment. Existing multi-span bridges offer convenient access for installation and maintenance. Raising the equipment also provides clear passage for fish migration.

The present invention provides a system generating electricity by gravity. This system includes a plurality of tanks mounted on a circulating device. When the tanks receive the working medium descending from a higher place by gravity, the circulating device is driven to circulate along a guiding device so as to drive a working shaft of a generator for generating electricity. A transmission mechanism is added between the circulating device and the working shaft to increase the rotational speed of the working shaft.

A water power machine comprises a drive means and a drive output means which are interconnected by a lever drive assembly. The drive means comprises a motor operated by downward movement of water, the water being lifted again by a conveyor operated by power taken from the drive means, whereby the water power machine operates with a comparatively small amount of water by virtue of utilising a circulating amount of water.

Normally hydroelectric dam powerhouses use river flow once before discharging it as turbulent tailwater, ineffective to spin turbines. The present invention uses tapered channels to confine and constrict turbulent tailwater into laminar flow that drives turbines both submersible and floatable utilizing the same water three times concurrently to generate new electricity. Channels originate adjacent to draft tube outlets, constrict in the downstream direction to create narrow necks where turbine/generators benefit from debris free, increased velocity and laminar flows to generate electricity. Hydroelectricity uses zero fuel, creates zero waste and has zero carbon dioxide emissions. Structures are uncomplicated, construction is within project boundaries minimizing environmental impacts and speeding projects coming online. New facilities are protected by existing dam security. Hydroelectricity replaces less dependable renewable energy systems.