An air driven wheel is magnetically coupled to drive a plurality of electrical generators to generate electrical power responsive to the actuation of the wheel.

An offshore power generator includes an offshore platform. Current, wind, wave and other renewable energy generators are mounted to the offshore platform. Each current generator has a shroud enclosing a set of blades. A hub member is located within the shroud and extends in an upstream direction from the blades. The flow area between the interior of the shroud and the hub member converges from the shroud inlet to the blades.

A compact hydropower generator adopting multiple rotary drums comprises a water reservoir for changing the flow direction of water that flows along a river and for temporarily storing the water. A base body is located at a lower side of the water reservoir and has a drainage way formed at an end of a downwardly inclined portion thereof. An upper closing member and a lower closing member are provided at opposite sides of an upper end of the base body. The upper closing member is configured to com...

A fluid power conversion apparatus (1) serving fluid pumping and/or power-generation functions, including: (a) an impeller (5) having a hub (8) and a periphery; (b) a housing (13) around the impeller; (e) a diffuser (12) having an outer wall attached to the housing, a diffuser hub (7) axially-aligned with the impeller hub, rotatable support of the impeller being provided only by a bearing assembly (6) internal to the hubs, and at least one stator vane (11) securing the diffuser hub to the outer ...

A power generation flume for use with fluid or water flow channels that includes an acceleration zone where a power generation system can be used in an accelerated flow to generate power in a cost efficient manner. The flume can have a variety of dimensions and can be used at one or at multiple locations along or across the flow channel without effecting upstream flow conditions.

A current power generator includes a vertical support member mounted to the seabed and horizontal support members mounted to the vertical support member. Generators are mounted between the horizontal support members. A rotatable shaft is operatively connected to each of the generators such that when the shaft rotates, the generator generates electricity. Blades mounted to the shaft are capable of rotation in response to water current. The generators are pivotal relative to the horizontal support...

A fluid power conversion apparatus serving fluid pumping and/or power-generation functions, comprising: an impeller having an impeller hub and a periphery; a housing around the impeller; a diffusor having (a) an outer wall attached to the housing, (b) a diffusor hub rotatably supporting the impeller, and (c) at least one stator vane securing the diffusor hub to the outer wall; and a rotating electrical machine having (a) an armature attached to the housing and (b) a rotor attached to the impelle...

The water inflow structure for a hydroelectric generator system has a step which cooperates with two adjacent blades of a runner to retain a quantity of water, the weight of which rotates the runner. Each blade of the runner has a forward surface which is inclined when the blade is at its highest position, to prevent water from overlying the runner shaft to produce reverse rotation. An inflow opening is formed in the step to admit water past a blade which is at the step.

This external penstock is designed to direct a portion of water from a waterfall to a water wheel coupled to a generator that produces electrical power for inductrial and other use. Primarily, it consist of a telescoping sleeve assembly securable to a cliff face behind a water fall, and a nozzle on the bottom of the assembly directs the downward flow of water against blades of a water wheel mounted to a platform also secured to the cliff face behind the waterfall.

A grid with graduation-markings of equal width relative to each other and succeeding in nonequidistant spacings, wherein the graduation-markings define center lines which follow each other in distances corresponding with a cycle of n graduation markings. The cycle has a period length of units and wherein each full numbered multiple of a unit occurs as spacing between two graduation markings exactly k times.