System and method for generated power from wave action

Patent metadata

Field	Value
Publication number	US-9528491-B2
Application number	US-201414506016-A
Country	US
Kind code	B2
Filing date	Oct 3, 2014
Priority date	Jun 7, 2011
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

Wave energy conversion systems are provided utilizing a mass of water entrained in a collapsible water mass enclosure that is suspended beneath a float (e.g., a vehicle, buoy, platform, etc.) to provide an inertial force in opposition to the rising heave-induced acceleration of the float. The water mass enclosure is communication with a generator, such as by tethering one end of a tethering means to the generator and the other to the enclosure. The enclosure may be placed in communication with an intermediary hydraulic system, which is also in communication with the generator. In certain embodiments, the system will include a reel system for deploying and retrieving the water masse enclosure.

First claim

We claim:

1. A system for producing electrical energy from kinetic energy contained in ocean gravity waves, the system comprising:
a surface float;
a water mass enclosure including a collapsible, cylindrical housing extending from an opening at a top of the cylindrical housing to a substantially closed bottom of the cylindrical housing to define an inner chamber, the inner chamber adapted to be filled with an amount of water upon submersion of the enclosure in a body of water and the inner chamber having a defined shape when filled with the amount of water, wherein the housing retains the defined shape when accelerated upwards by the vertical motion of the surface float under the influence of a gravity wave when the enclosure is placed into communication with the surface float, and retains the defined shape during a downward restoring motion of the surface float;
the water mass enclosure further including multiple first annular battens disposed within the inner chamber of the housing and having a circumference corresponding to that of the inner chamber and multiple second annular battens connected with the multiple first annular battens, the multiple second annular battens disposed concentrically within the first batten; and
a hydraulic system connected to the water mass enclosure for converting mechanical energy generated from the influence of a gravity wave on the water mass enclosure to electrical energy.

2. The system according to claim 1 , further comprising one or more apertures located on the bottom of the housing, the apertures adapted to allow water contained within the inner chamber to exit the same when the enclosure is removed from the body of water.

3. The system according to claim 1 , wherein the housing further comprises a one-way gill, which allows water to enter the chamber upon submersion of the enclosure in the body of water.

4. The system according to claim 1 , wherein the housing comprises an aramid fiber or Kevlar.

5. The system according to claim 1 , wherein the inner chamber holds from about 500 kg to about 1000 kg of seawater.

6. The system according to claim 1 having a counterweight attached to the bottom of the housing.

7. The system of claim 1 , wherein the hydraulic system comprises:
a lever arm in communication with the water mass enclosure via a tethering means and further in communication with a hydraulic cylinder, the hydraulic cylinder comprising a piston and hydraulic fluid; and
a rotary hydraulic motor in communication with the hydraulic cylinder and further in communication with a generator adapted to convert mechanical energy of the hydraulic motor to electrical energy,
wherein downward movement of the water mass enclosure causes the lever to move, forcing hydraulic fluid through the rotary hydraulic motor via the hydraulic cylinder, thereby causing the generator to produce electrical energy.

Assignees

• Leidos Inc

Inventors

• Hench Steven C
• Fralick Charles R

Classifications

• F15B2211/2053

  Type of pump · CPC title

• Y02E10/38

  Cross-Sectional Technologies · mapped topic

• E02B9/08

  Tide or wave power plants (water-pressure machines, tide or wave motors F03B) · CPC title

• F15B2211/7058

  Rotary output members · CPC title

• F15B11/08

  with only one servomotor · CPC title