Method of generating hydro electric energy in rivers and streams without dams and/or locks

Most large hydro-electric energy generation facilities utilize large expensive dams which flood sometimes useful land forming a lake or hamper river navigation requiring expensive lock systems.

The most suitable natural falls and dam locations on rivers in the world are already being utilized to generate hydro-electric energy. Some existing dams on rivers are being utilized to generate hydro-electric energy where cost vs benefits analysis can justify the project.

There are many rivers and streams in the world which have a flow rate and elevation drop suitable for hydro-electric generation, but are not suitable for dams Because they would hamper river transportation or flood valuable land.

This invention provides a novel method for generating hydro-electric power on rivers and streams without requiring the building of expensive and time consuming dams and locks and without hindering river transportation or the environment.

The method of this invention utilizes a conduit located at least partially beneath the surface of a river or stream to feed water into a hydro-electric turbine. The conduit is positioned in the direction of river water flow with the inlet end of the conduit upstream and at a higher elevation than the downstream end of the conduit which feeds water into a hydro-electric turbine.

The upstream water inlet end of the conduit can be positioned to be near the river water surface and the downstream end of the conduit is attached to the hydro-electric turbine which is below the water surface.

A semi-circular coffer dam can be used at the inlet end of the conduit to utilize river flow rate to increase river water surface elevation at the inlet end of the conduit and thereby increase the head pressure at the hydro-electric turbine.

The conduit of this invention can have any cross-sectional shape including the following shapes: circular, oval, rectangular and square and it can be made of any material including plastic and metal.

The conduit of this invention can be seamless or seamed in any direction including seams parallel and/or perpendicular to the direction of water flow inside the conduit.

The conduit of this invention can be made from two or more flat sheets of material seamed along both sides parallel to the water flow inside the conduit.

The conduit of this invention can have multiple inlets and/or multiple exits feeding multiple hydro-electric turbines.

The conduit of this invention can be attached to the bottom or shore line of a river or stream.

The elevation of the inlet end of the conduit can be mechanically adjusted to maximize turbine head pressure at various river levels. The elevation of the inlet end of the conduit can also be controlled by floatation.

The hydro-electric turbine of this invention can be positioned to be above the downstream river water surface elevation and below the conduit inlet elevation.

FIG. 1 shows an elevation view of the conduit ( 1 ) fully submerged in a river flowing from left to right ( 2 ). The conduit inlet ( 3 ) is below the river surface ( 4 ) to allow gravity to fill the conduit. The water flows ( 5 ) through the conduit from the inlet ( 3 ) to the hydro-turbine ( 6 ) because the conduit inlet is at a higher elevation than the hydro-turbine. The elevation drop ( 3 ED) from the conduit inlet to the hydro-turbine provides the head pressure required to drive the hydro-turbine which produces electric power. FIG. 1 also shows the conduit attached to the river bottom with straps ( 7 ) and to the hydro-turbine connection ( 8 ).

FIG. 2 shows a plan view of two identical conduit/turbine systems with one system on each side ( 11 A and 11 B) of a river. Each conduit/turbine system has one conduit inlet ( 3 ) and one connection ( 8 ) to one hydro-turbine ( 6 ).

A semi-circular coffer dam ( 9 ) is shown around the conduit inlet ( 3 ) in FIG. 1 and each inlet ( 3 ) in FIG. 2 . The coffer dams utilize river flow ( 2 ) to increase river surface elevation ( 10 ) at the conduit inlets and thereby increase head pressure at the hydro-turbine.

FIG. 3 shows a plan view of a conduit/turbine system with two conduit inlets ( 3 ) and four conduit exits each feeding one of four hydro-turbines ( 6 ).

FIG. 4A and FIG. 46 show elevation views of a single conduit/turbine system wherein the elevation of the inlet end ( 3 ) of the conduit ( 1 ) is vertically adjustable using a mechanical mechanization ( 12 ) or a floatation mechanization ( 13 ) to maximize head pressure at various river levels. FIG. 4A shows the river surface at low elevations ( 14 ) and depths (D 1 ) during dry seasons and FIG. 46 shows the river surface at higher elevations ( 15 ) and depths (D 2 ) during wet seasons.

FIG. 5 shows a cross-sectional view of a conduit made from two flat sheets of any suitable material seamed along its length on both sides ( 17 A) parallel to water flow ( 5 ) inside the conduit. The broken parallel lines show the two flat sheets ( 16 A) of the conduit seamed at the edges ( 17 A) but without water inside the conduit. The solid lines show the same seamed conduit ( 166 ) and seams ( 17 B) with water flowing inside the conduit ( 5 ) and causing the cross-sections shape to be oval or circular.