US7823380B2 – Free Floating Wave Energy Converter – Google Patents

Gorila Consequently, without any air in it, the Pipe sinks (Pipe material being more than one S.G). In case of inclement wave climate, ingest only water so as to sink the flexible pipe(s), wherein flow ceases. Only the ‘flexible pipes’ and rigid pipes are to be laid on the ocean. 7, two or more inflatable buoyancy tanks 702, connected individually, in groups or jointly through respective hoses 705 and 706 with the “pressure chamber”, which is normally shore-based, the pneumatic pressure and controls and switching devices generally installed at the pressure chamber, the variable buoyancy tanks suitably arranged on the Inlet apparatus whereby the angle of rotation around the lateral axis of the Inlet apparatus and its buoyancy, can be controlled. Several ocean wave energy conversion devices have since been developed, but only a few matured to full-scale trial stage, but none yet implemented fully on a commercial scale.

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IMÁGENES DE HERPES EN EL CUELLO - Herpes en el cuerpo Most of the state of the art WEC’s capture energy from the heaving motion of the waves, which is along the vertical axis. According to the present invention, energy is extracted from the wave propagation in the horizontal plane whereas in the rest of the state of the art WEC systems mostly capture energy from the undulations of waves or surge, almost all in the vertical axis.

Its uniqueness lays mainly in its principle of operation, as against the rest of the state of the art WEC systems, which mostly capture energy from the undulations of waves in the vertical axis or surge, the FFWEC of the present invention extracts energy from the wave propagation in the horizontal plane. Thus, energy is extracted due to propagation of the waves, thereby building up the pressure. Contrary to belief the said non-return valves in the flexible pipe do not prevent the occurrence of surge or stall, hence they have not been provided in the present invention. Non-return Valves. It may be noted that non-return valves in the flexible pipe do not prevent the occurrence of surge or stall, hence have not been provided in the invention. The “Flexible Pipe” not only absorbs energy from the crest of a wave but might also trap it from below it and in its proximity as well.

To properly size an underwater wave energy converter, the wave power at the operating depth must be known. Since water inside the flexible pipe flows at the wave velocity and in phase with the waves, at the time of initial start the Inlet must ingest and accelerate slugs of water from the initial “zero” relative velocity to that of the waves, both at the right moment and within a very short period of time (less than a half wave period). Therefore, it enters near the trough 411 and exists at the crest 412 of the waves as they pass (for explaining the sequence, the wave in the drawing is shown as stationary while the Inlet is shown in three positions, moving from right to the left). 6, the buoyancy tank 602 being inflatable and directly connected with the pneumatic hose 605 as above, but without the air duct and water breathing tube (the rest of the arrangements being similar to the previous embodiment described in the above paragraph).

SUMMARY OF THE INVENTION The FFWEC of the present invention consists basically of flexible pipes which float on ocean waves and convert the horizontal or progressive wave motion directly into kinetic energy, by pumping or pushing air and water through the “Flexible Pipes”, which can be employed to drive conventional hydroelectricity generators or pump ocean water into reservoirs, etc. The Inlet functions to impart some Kinetic Energy to the water slug at the time of “zero” start and subsequently to ingest graduated amount/volume of air and water, synchronous with the waves. Least Cost/KW (only flexible pipes absorb the wave energy). Since the Pipes would essentially be made of specific gravity (SG) higher than that of water “one”, they will sink when filled mostly with water. Most importantly, it is unlikely that of any WEC of today, can be implemented with generic resources. Most importantly, none of the WEC today can perhaps be implemented with the resources readily available.

A special “Inlet”, integrally attached at the mouth of the flexible pipe ingests graduated slugs/segments of air and water into the flexible pipe, synchronous with the waves. The same being very light in weight can be implemented with the help of standard vessels and crew even on a very large scale. An Inlet is a floatable apparatus, flexibly attached at the throat of the “Flexible Pipe” through an “Inflexible Pipe”, kept afloat by means of one plurality of buoyancy tanks, inflexible or flexible, with or without provision for controlling buoyancy thereof, either individually or collectively, so as to provide the desirable buoyancy and even ceasing operation by completely sinking or floating the apparatus. Dolor muscular al levantarse dela cama . FIG. 7 shows inlet with plurality of inflatable buoyancy tanks and control. The slugs of water which enter the Inlet get detached from the main body of water and move through the flexible pipe in phase with the corresponding wave, while retaining the wave velocity.

And whenever required, ingest only air so as to float the pipe wholly, wherein flow ceases. Thus, if pneumatic pressure is applied at one end of the pipe 104, it will ‘push’ all the water segments up the crest slope of the proceeding wave 105. In other words, a pressure head will be created, which will be equal to the sum total of all the height displacements of the water segments. To raise them again, the pneumatic pressure that would generally be available in the “pressure chamber” would be used to purge the water out of the Pipes. Como aliviar el dolor en las articulaciones de las manos . Blocking of Inlet/Outlet. The flow should not be physically stopped either by cutting off the inflow or outflow, as this could damage the Flexible Pipes. Several such Pipes could be grouped together, in series and/or parallel, to make a wave energy farm. As waves pass, wave form and wave energy move rapidly forward, but not the water.

Therefore, the maximum energy which the “flexible pipe” can extract will be all along its length-much more than that by a “point absorber”. Therefore, the Pipe could also be termed as a “non-positive displacement wave pump”. By doing so, first, the effective wave height could be increased from the actual wave to that adopted by the Flexible Pipe and second, it will also help when the wave height increases. They generally work with specialized and propriety technologies. Diameter of orbit increases with increasing wave size and decreases with depth below the water surface. A ‘Flexible Pipe’ floats on the surface of water and adapts to the waveform. The FFWEC of the present invention basically consists a “Flexible Pipe” (or more than one Pipe), which floats on the surface of water, generally facing the oncoming waves, so located with the help of suitable moorings. Suitable controls are provided, generally on-shore, for regulating the buoyancy of the Inlet.

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However, since the waves are not regular, provision for optimally controlling and regulating the air and water ingestion timing and volume are provided. The former is by the virtue of the horizontal progression of waveform and the latter due to heaving motion or the height difference between the wave crest and trough-wave height.

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In the above embodiment, plurality of rigid buoyancy tanks similar in construction to the one explained at FIG. Outlet. The “Outlet” is a rigid Pipe or a coupling, located at the end of the Pipe, which could be further connected to a conventional hydropower generator or a reservoir, generally via a “Pressure Chamber”. At near-shore locations, where reflective waves are expected, additional lengths of ‘rigid pipes’ may be attached to the Outlet for conveying the fluid flow to the generator-turbine or reservoir. In general, the wave power below sea level decays exponentially by −2πd/λ where d is the depth below sea level. Buoyancy is increased or reduced by filling the buoyancy tanks with air or water, respectively. The above apparatus has no controlling devices, but can yet function 5 under fair wave climatic conditions, with average efficiency and reliability. Very easy to install/un-install and maintain. Has very high survivability factor under stormy conditions (it submerges, like a submarine).

Survivability. The FFWEC might be the only WEC to have an inherent survival capability. The FFWEC of the present invention is the only WEC to have an inherent survival capability. In case of inclement wave climate, the inlet functions to ingest only water so as to sink the flexible pipe or plurality thereof, wherein flow ceases. Dolor en la parte trasera de la pierna derecha . Now, instead of above experiment, if we consider a wave train, the opposite will happen; that is, pressure will be generated and the water/air segments will start flowing in the pipe along with the wave train. 1( a) and (b), respectively. Further, and most importantly, the FFWEC has no contacting components and moving part; besides the ‘flexible pipe(s)’ itself. Quite to the contrary, the devices will hinder exchange of fluids between adjacent slugs of air/water, which might normally happen due to variation in the wave characteristics along the length of the pipe.

The technologies used are well matured (mostly ‘brick and mortar-minimum hi-tech).

When the FFWEC is idling, i.e., with no load applied at the outlet, the water slugs remain in the trough part of the waves as it progresses. DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS OF THE INVENTION Embodiments of the present invention will be described below specifically with reference to accompanying drawings. The intake volume and timing of air and water Slugs are controlled by altering the buoyancy and/or ‘up-down’ tilt of the Inlet along its lateral axis. A continuous flow of water and air is thus created. Oscillating Water Columns (OWC) These devices generate electricity from the wave-driven rise and fall of water in a cylindrical shaft. The technologies used are well matured (mostly ‘brick and mortar-minimum hi-tech). The Flexible Pipe absorbs the slack. Due to this, the “Slugs” of water in the troughs are pushed up the slope of the preceding crests all along the Flexible Pipe. As a surfer rides down a wave, it follows him, but not the water.