Wave power plant

Patent metadata

Field	Value
Publication number	US-8943821-B2
Application number	US-201013519781-A
Country	US
Kind code	B2
Filing date	Dec 16, 2010
Priority date	Dec 30, 2009
Publication date	Feb 3, 2015
Grant date	Feb 3, 2015

Abstract

A wave power plant includes a platform and at least one coupling member. The at least one coupling member is mounted in such a way as to perform an orbital movement which has a predetermined direction of movement and from which a torque usable for energy conversion can be tapped. A torque compensation device is provided which is designed to essentially compensate or neutralize a reactive torque generated by tapping the usable torque.

First claim

The invention claimed is:

1. Wave power plant for use in a body of water comprising:
a platform;
at least one coupling body mounted relative to the platform to receive wave motion of the body of water;
an energy converter device connected between the coupling body and the platform and configured to generate a usable torque tapped from movement of the coupling body in an operating state;
a torque compensating device which includes at least one rack mounted rotatably on the platform, wherein said at least one coupling body is mounted on said rack and moves in orbital motion relative to said rack; and
a countertorque generating mechanism mounted on said rack, configured to apply a countertorque to said rack in response to one or more of the usable tapped torque and spatial position of said rack to retain said rack substantially stable, such that the platform remains substantially torque-free.

2. The wave power plant as claimed in claim 1 , wherein the countertorque generating mechanism is configured to modify the weight distribution along one or more of the platform and the rack such that the weight distribution counteracts the reaction torque.

3. The wave power plant as claimed in claim 1 , wherein the countertorque generating mechanism provides a non-symmetrical buoyancy along the platform or the rack such that the buoyancy counteracts the currently tapped usable torque.

4. The wave power plant as claimed in claim 1 , wherein the countertorque generating mechanism has at least one sliding weight, movably mounted on the platform or the rack for movement-perpendicularly to the orbital motional axis of the at least one coupling body.

5. The wave power plant as claimed in claim 1 , wherein the platform has a geometric center point, and wherein:
the platform has an asymmetrical, fixed weight distribution/buoyancy force distribution perpendicular to the axis of orbital motion of said at least one coupling body, and/or
the rack has with respect to its rotational axis on the platform a geometrical, fixed weight distribution or buoyancy force distribution in its longitudinal direction.

6. The wave power plant as claimed in claim 1 , further comprising at least one flow guiding element, which is disposed on end faces of the at least one coupling body and which produces an alignment of the platform or the rack in the direction of advance of the wave such that the direction of propagation of the wave is oriented substantially perpendicular to a bearing axle.

7. The wave power plant as claimed in claim 1 , further comprising at least one damper plate, which is connected to the platform or the rack by a rigid coupling device in order to damp motions of the platform.

8. The wave power plant of claim 1 , wherein the countertorque generating mechanism includes a trimming fluid which is accommodated in a fluid guiding system and is configured to be pumped back and forth in the longitudinal direction of the platform or the rack.

9. The wave power plant as claimed in claim 3 , wherein the countertorque generating mechanism has at least one buoyancy body/ballast tank, said at least one buoyancy body/ballast tank disposed or configured on the platform or the rack decentrally to the center of gravity of the platform or the rack.

10. The wave power plant as claimed in claim 3 , wherein the countertorque generating mechanism has a number of buoyancy bodies/ballast tanks, said number of buoyancy bodies/ballast tanks disposed or configured on two end portions of the platform or the rack, said end portions being spaced apart one opposite the other perpendicularly to the orbital motional axis of the coupling body and at least one of said buoyancy bodies/ballast tanks on said end portions having a variable buoyancy.

11. The wave power plant as claimed in claim 9 , wherein the at least one buoyancy body/ballast tank is volume-variable or floodable.

12. Wave power plant for use in a body of water, comprising:
a platform;
at least one coupling body mounted rotatably on the platform to receive wave motion of the body of water;
an energy converter device connected between the coupling body and the platform and configured to generate a usable torque tapped from movement of the coupling body in an operating state; and
a torque compensating device separate from the at least one coupling body configured to counterbalance a reaction torque of the platform generated in reaction to the usable torque, and including a countertorque generating mechanism including at least one buoyancy body disposed on a longitudinal end portion of the platform and a mooring chain disposed on an opposite longitudinal end portion of the platform, and wherein the at least one buoyancy body is set such that the obtained buoyancy, given a horizontal alignment of the platform together with the mooring chain and/or a non-symmetrical weight distribution along the platform generates a total countertorque which is roughly equal to the usable torque tapped from the at least one coupling body.

13. Wave power plant for use in a body of water, comprising:
a platform;
at least one coupling body mounted rotatably on the platform to receive wave motion of the body of water;
an energy converter device connected between the coupling body and the platform and configured to generate a usable torque tapped from movement of the coupling body in an operating state; and
a torque compensating device separate from the at least one coupling body configured to counterbalance a reaction torque of the platform generated in reaction to the usable torque,
wherein the energy converter device includes a lever rotatably mounting the coupling body relative to the platform, the lever coupled to and driving an axle for generating a usable torque, the energy converter device further including an adjustment unit for adjusting the length of the lever to vary the usable torque in order to adapt the usable torque to the sum of the currently obtaining compensating moments.

14. The wave power plant as claimed in claim 13 , wherein the torque compensating device includes a countertorque generating mechanism configured to apply a countertorque to the platform in dependence on one or more of the currently tapped usable torque and a current spatial position of the platform, such that the platform remains essentially stable.

15. The wave power plant as claimed in claim 14 , wherein the countertorque generating mechanism has a mooring chain fixed to the platform decentrally to the center of gravity of the wave power plant.

Assignees

• Hagemann Benjamin
• Scharmann Nik
• Bosch Gmbh Robert

Inventors

• Hagemann Benjamin
• Scharmann Nik

Classifications

• Y02E10/38

  Cross-Sectional Technologies · mapped topic

• F03B13/20 Primary

  wherein both members {, i.e. wom and rem} are movable relative to the sea bed or shore · CPC title

• F05B2240/97

  on a submerged structure · CPC title

• F03B13/1825

  for 360° rotation · CPC title

• Y02E10/30

  Energy from the sea, e.g. using wave energy or salinity gradient · CPC title