Methods, systems and apparatuses including systems and methods that can be used for operating a hydrokinetic turbine such as along one or more flow channels of a river for power generation is disclosed. The hydrokinetic turbine can be positioned within the one or more flow channels or can be shaped to form one or more flows and can be turned by the flow of the river.

Disclosed is a device for analysing water and a swimming pool equipped with such a device. The device includes: an analysis chamber provided with at least one water inlet and at least one water outlet; a sealed housing adjacent to the analysis chamber and isolated from the analysis chamber by a partition; a data processor housed in the sealed housing; at least one probe electrically connected to a data input of the data processor; an electrical power supply electrically connected to a power input of the data processor, the electrical power supply having an electrical generator provided with a turbine housed in the analysis chamber, the electrical generator being electrically connected to the data input of the data processor. The device is useful for monitoring the sanitary state of the water of a swimming pool.

A floating drum turbine is used for generating the electrical energy from the kinetic energy of a water stream (sea wave or river flow) that provides the mechanical energy needed to rotate an electrical generator for generating the electricity. The drum turbine is installed on a buoyant skid anchored to the seabed by some chains/ropes to keep it in a fixed position and direction along the water stream. The turbine is coupled to an electrical generator with a power transmission system, and generates the electricity that is transferred to the coast using a cable system floated on the water surface.

An arrangement for generating energy made up of at least two rotating bodies of revolution partially immersed in a dynamic fluid. The at least two rotating bodies of revolution have their longitudinal axis of rotation located perpendicularly to the flow of the fluid, and are further associated to support means and to drive means, being immersed about 30% of their diameter. One of the at least two rotating bodies of revolution is located upstream of said dynamic fluid with its longitudinal axis of rotation located in a longitudinal slider of the support means with the possibility of translation and variable rotation speed. The other of the at least two rotating bodies of revolution is located downstream of the dynamic fluid, with its longitudinal axis of rotation being attached to the support means, and with a rotation synchronized with the flow speed of the dynamic fluid.

Disclosed is an underwater water transfer apparatus deployable within a water body. The apparatus includes a closed receptacle suspended underwater at a first depth, the receptacle adapted to receive ambient water at the first depth therewithin as a result of either the relative movement of the receptacle with respect to the ambient water or vice versa, or both, a tube in fluid communication with the receptacle, and a heat exchanger submerged at a second depth. The heat exchanger extends from an extremity of the tube so as to alter the temperature of the incoming water from the tube, before being released at the second depth, to be closer to that of ambient water at the second depth.

A modular, electricity generating apparatus comprises an elongate, central member comprising a first end and a second end; at least one foil disposed about the central member in fluid interacting relation thereto; the solar foil comprising an outer surface having photovoltaic properties; the first end and the second end dimensioned and configured to be connected to a connecting node; and, the elongate central member at least partially formed of an electrically conductive material and configured to conduct electricity from at least one of the connecting nodes to the other of the connecting nodes.

The invention relates to a floatable hydroelectric generator (10) for harvesting electrical energy from the flow (R) of water in a river. The generator assembly (10) includes a floatable chassis (12) to which are connected two spaced-apart rotational axles (18). An electrical generator (not shown) is mounted on the floatable chassis (12) and coupled to the rotational axles (18). A chain (20) is connected to the rotational axles (18) via pulley wheels (16). A plurality of water receptacles (22) are fixed to the chain (20), and each being orientated, when submerged, to present their major openings towards an oncoming waterflow direction (R). A plurality of minor openings (24) is provided through a wall of each water receptacle (22). A valve member in the form of a flexible flap (26) is located within each water receptacle (22) for controlling passage of water through said minor openings (24). The flexible flap (26) is adapted to selectively permit flow of water through the minor openings (24) into each water receptacle (22); but substantially prevent flow of water through said minor openings (24) out of each water receptacle (22). The generator assembly (10) of the present invention may be deployed at a desired location within a river—optionally as part of a larger array of such assemblies—to generate electricity on a substantially continuous basis.

A power generation system includes a flotation assembly configured to float in water and a first harnessing assembly coupled to the flotation assembly and disposed in an airflow above the water. The first harnessing assembly is configured to harness the airflow to create a first rotational energy. The system also includes a second harnessing assembly coupled to the flotation assembly and disposed in the water. The second rotational assembly is configured to harness movement of the water to create a second rotational energy. The flotation assembly also includes a generating module to convert the first and second rotational energies into electrical energy.

Apparatus (2) for generating electricity from water (4) flowing in a river (6), which apparatus (2) comprises: (i) a stator (B): (ii) a rotor (10) which is rotatable with respect to the stator (8}in order to generate the electricity, and wherein: (iii) the rotor (10} rotates about an axis (12} which extends in a direction transversely across the rotor (10) from a first side (14) to a second side (16) of the r9tor (10); (iv) the rotor (10) comprises a plurality of rotor blades (18) which extend from at least one of the first and second sides (14, 16) of the rotor (10); (v) the rotor blades (18) are such that each rotor blade (18) has an inner end (20) which is adjacent the side of the rotor (10) from which the rotor blade (18) extends, and an outer end (22) remote from the inner end (20); (vi) the inner end (20) of the rotor blade (18) is movably mounted with respect to the rotor (10) such that the rotor blade (18} is movable between a first position (24) and second position (26); (vii) the first position (24) is one in which the rotor blade (18) extends away from the side of the rotor (10) for being engaged by the water (4) such as to cause the rotor (10) to rotate to generate the electricity; (viii) the second position (26) is one in which the rotor blade (18) extends closer to the side of the rotor (10) than when the rotor blade (18) is in the first position (24); (ix) the second position (26) is one in which debris (28) which is in the water (4) flowing in the river (6) and which has become impacted against the rotor blade (18) is able to be freed from the rotor blade (18) by the water (4) flowing in the river (6); and (x) the rotor blade (18) is movable from the first position (24) to the second position (26} to free the rotor blade (18} from the debris (28), and the rotor blade (18) is movable from the second position
(26) to the first position (24} to enable the rotor blade (18) to resume the first position (24) for generating the electricity.

A convex type guide plate waterwheel energy increasing device with gradually dense holes is provided. The convex type guide plate waterwheel energy increasing device comprises fixed devices, a main diversion plate and auxiliary diversion plates, wherein an upwards convex arc structure is arranged on the top surface of the main diversion plate, gradually dense first through holes are formed in the main diversion plate from the middle to the two ends, the diameters of the first through holes are gradually increased, the auxiliary diversion plates are connected to the two sides of the main diversion plate, second through holes are formed in the auxiliary diversion plates, fixed devices are fixed to the two sides of the auxiliary diversion plates, and the fixed devices are used for fixing the main diversion plate and the auxiliary diversion plates to the riverbed. Through the convex type main diversion plate with the gradual dense holes with different heights, the device adapts to the condition that the distance between the waterwheel and the bottom of the riverbed is different along with the change of the phase angle, kinetic energy of low-velocity air at the bottom of the riverbed is conveyed to the impeller area of the waterwheel, the effective acceleration area in the river channel is large, the average velocity of water flow in the impeller area of the waterwheel is increased, and the output power of the unit is improved.