Ocean wave power generator (a “modular power-producing network”)

• US 6,647,716 B2
• Filed: 06/04/2001
• Issued: 11/18/2003
• Est. Priority Date: 06/08/2000
• Status: Expired due to Fees

• Current Assignee: Secil Boyd
• Original Assignee: Secil Boyd
• Inventors: Boyd, Secil
• Primary Examiner(s): Look, Edward K.
• Assistant Examiner(s): LESLIE, MICHAEL S
• Application Number:
  US09/874,460
• Publication Number:
  US 20020157398A1
• Time in Patent Office: 897 Days
• Field of Search: 603/98, 604/13, 604/18, 417/332
• US Class Current: 60/398
• CPC Class Codes: F03B 13/1815 with an up-and-down movement
• CPC Class Codes: F03B 13/20 wherein both members , i.e. wom and rem are movable relative to the sea bed or shore
• CPC Class Codes: F05B 2220/62 for desalination
• CPC Class Codes: F05B 2240/40 Use of a multiplicity of similar components
• CPC Class Codes: F05B 2260/406 through hydraulic systems
• CPC Class Codes: Y02E 10/30 Energy from the sea, e.g. using wave energy or salinity gradient

Abstract

Disclosed herein is a compound device (a “modular power-producing network”, or “power net”) for the purpose of transducing the energy in ocean waves into electrical energy. The invention first pressurizes ocean water (or a suitable alternative hydraulic fluid) into at least one storage chamber with a compressible air pocket, employing at least one float (responding to oscillatory wave motion) linked to at least one hydraulic ram (or alternative pressurizing device), the system being designed so that a multiplicity of these inventions may function concurrently in proximity to each other. The fluid in the chamber, when brought to a minimum threshold pressure by the float/ram mechanism, is released in a pressure-regulated stream that engages a hydraulically-operated turbine, which, because of the regulation, may directly produce properly governed alternating current suitable for release on standard power grids. Modified versions or configurations of the invention may also generate hydraulic pressure at a level suitable for purifying a portion of the ocean water in a storage chamber by reverse osmosis or other suitable means.

Claims

1. A composite or modular device or system for the purpose of extracting energy from ocean waves, initially in the form of pressurized fluid capable of transduction into electrical energy or useful work, comprised of:

one or more stable, structurally stiff framework member(s) or structure(s);

means of suspension of the composite device in ocean water;

one or more pressurizeable storage vessel(s) for fluid, containing a captive air pocket at the top of at least one of said vessels, capable of providing pressurized fluid to an energy transducer above water level including a generator or other means of transforming energy or performing work;

one or more lever arm(s) with one or more floats at their distal end(s), and hinged to one or more of the framework structure(s) at their proximal end(s);

one or more valved cylinder-and-piston type fluid displacement mechanism(s) or water ram(s);

means of conduction of the pressurized fluid between the water ram(s), the storage vessel(s), and one or more locations for transduction of be pressurized fluid into electrical energy, or used for other application(s), whether on or near the device or removed therefrom;

means of connecting the components of the device or system to each other;

means of generating electrical energy from the pressurized, stored fluid; and

means of conducting energy generated, or other forms of energy generated, to the areas of use.

2. The device of claim 1 wherein said framework consists of one or more structure(s) built for the purpose of supporting and deploying the other components of the device and wherein the means of suspension of the device include ordinary flotation means like a boat or raft;

or alternatively such means comprise several elements of the device—

including air pockets in pressurizeable storage vessel(s), air or vacuum within the float(s), and/or one or more automatic buoyancy control(s), which are chamber(s) that communicate(s) at the bottom with the open ocean and have one or more means of pumping in or removing air from the top, so the ballast weight is variably controllable.

3. The member or structure of claim 2 wherein this component is a structure built to orient vertically with one or several pressurizeable storage tanks anchored thereto several fathoms in depth to both increase storage capacity and to provide a deep-ballast situation to stabilize the entire structure relative to surficial wave activity, wherein such structure is largely composed of large-gauge plumbing pipes to provide the structural elements and conduct compressed fluid between storage vessels, and cables deployed to stabilize the composite result both vertically and between deep-ballast storage vessels.

4. The device of claim 1 wherein one or more storage underwater vessel(s) are provided for the purpose of storing fluid pressurized by other component(s) of the device, which storage vessel(s) have a compression air pocket at the top of one or more of them—

which air pocket is capable of pushing stored fluid with sufficient force to drive an electrical generator or other means of performing work located above sea level—

and which vessels have plumbed openings for conducting the fluid in and out as desired, and openings for other devices including but not limited to pressure relief valve(s).

6. The device of claim 1 wherein one or more pivoted lever arm(s) are provided that support one or more float(s) distally which capture the wave energy and convert it to vertical motion the lever arm;

and which arm(s) also support one hinged anchor point of the piston-and-cylinder type water ram(s).

7. The lever arm(s) of claim 6 designed to be of variable length in certain embodiments by utilizing one or more slip joint(s), which joint(s) are powered by one or more motor(s) and controlled by one or more servo-mechanism(s) to automatically or semi-automatically shorten or extend the arm(s)′

length depending upon the wave amplitude and/or other characteristics in the surrounding ocean in embodiments employing powered variable lever arms; and

which arm(s) are pivotally attached to the framework element(s) of the device in a manner that is likewise slidably adjustable, with or without servo-control to vary the height of the pivot point(s) above the water and/or to change the angle of attachment of the lever arm(s) to the water ram(s), thereby tuning the action of the lever arm(s) to maximum power transduction under given situations, in embodiments of the invention that are tuneable.

8. The device of claim 1 wherein one or more piston-and-cylinder style fluid-displacement mechanism(s) with valves to control intake and exhaust of fluid, commonly called water ram(s), are attached at one end thereof to the lever arm(s) and at the other end thereof to the framework structure(s) so that movement between the lever arm and the framework, caused by wave action, drives the piston within the cylinder and displaces ocean water or other fluid into the means of conduction of the fluid communicating with the storage vessel(s), thereby increasing fluid volume and pressure in the system, unless volume and pressure are otherwise relieved.

9. The fluid-displacement mechanism(s), or water ram(s), of claim 8 wherein said water rams are pivotally attached between elements of the framework(s) and the lever arm(s) of the device, which attachments are slidably adjustable, with or without power and/or servo-mechanism control in tuneable embodiments, and are designed and positioned to provide their delivery stroke into the fluid collection system of the device when the lever arm(s) are pushed upward by the action of waves upon the float(s);

but other additional water rams in certain embodiments provided in the opposite sense deliver fluid into the collection system as the lever arms are falling.

10. The device of claim 1 wherein means of conduction of pressurized fluid are provided in the form of pressure resistive semi-flexible or flexible lines and rigid pipes, designed to resist the pressure of fluid to be generated by the device, exceeding in strength the level of pressure that would begin to be relieved by safety provision(s) including pressure release valve(s);

and where means of conduction are provided between the elements of the device, or where the pressurized fluid may be conducted away from the site of the device via a combination of flexible, semi-flexible, and/or static plumbing components.

11. The means of conducting of claim 10 in which semi-flexible or flexible hydraulic lines are provided to link the water ram(s)′

output to the storage vessel(s)′

input aperture(s), and dipping tubes into storage vessel(s) and structurally stiff pipes linking storage vessels in those embodiments with multiple storage vessels, are also provided; and

hydraulic and/or plumbing lines are likewise provided to link the storage vessel(s)′

dipping tubes to the means of electrical generation, if generation is to occur on site; and

finally, plumbed means of conducting the stored fluid, using flexible or semi-flexible hydraulic lines in areas of anticipated motion, between modules of the device, and to the final use or transduction end-point(s) are also provided.

12. The device of claim 1 wherein the means of generating electricity is provided either off-site, or on the device or on some of the modules within an array of a multiplicity of modules of the device, and is comprised of one or more constant-speed water turbine(s) connected to electrical generators, wherein the revolution speed of the turbines, and, in turn, the generators, is tightly controlled via pressure regulation or other means so that standardized output for conduction directly onto standard land-based power grids is possible.

13. The device of claim 1 wherein a means of conducting transduced energy to the final site of use, a distribution point on an electrical grid, in the case of electrical energy, is provided;

and is comprised of waterproof electrical conducting cables.

5. The storage vessels of clam 4 which are constructed as large as possible given the expected internal and external pressures, meaning spherical for greatest strength, but other shapes may also be used;

and having openings thereto for conduction of fluids and the intursion of specific devices, to wit;

such storage vessel(s) designed to be located at or near the ocean'"'"'s surface, having at least one intake aperture In the lower ⅓

of the vessel—

i.e., under water;

at least one exhaust aperture near the top for a “

dipping tube”

inserted into the vessel(s) ending in the lower portion of the vessel(s) for the removal of fluid under pressure; and

at least one special-purpose aperture in the upper ⅓

of the vessel(s)—

i.e., above water, for the insertion of a pressure relief valve, and/or an air bleeder and pump mechanism to control the air volume, and/or other sensor(s) or active equipment; and

finally a hole in the bottom of the vessel(s) for communication with other storage vessel(s) designed to be at the bottom of the structure, if these additional vessels are employed in any specific embodiment;

such storage vessel(s) designed to be at the bottom of the structure several fathoms deep having at least one intake aperture near the top of the vessel(s) that can double as an exhaust aperture if fitted with a similar “

dipping tube”

, and other apertures if desired.