US4164383A – Water Wave Energy Conversion Device Using Flexible Membranes – Google Patents

The invention also provides a device for conversion of energy from water waves comprising an elongated flexible enclosure of impermeable material divided into compartments each containing gas, a high pressure gas conduit and a low pressure gas conduit, each compartment being connected to the gas conduits via non return valves arranged to permit one way passage of gas from the compartment into the high pressure gas conduit and to permit one way passage of gas from the low pressure gas conduit into the compartment, the device being adapted for location in water at or just below the surface so that as water waves pass along the device each compartment is subjected in turn to an external pressure alternation, gas being pumped when the external pressure is high from the compartment into the high pressure gas conduit and gas returning, when the external pressure is low, from the low pressure gas conduit into the compartment.

Fisiopatología del dolor gus SUMMARY OF THE INVENTION The invention provides a device for conversion of energy from water waves comprising an enclosure having a flexible wall of impermeable material, the enclosure containing gas and adapted for location in water at or just below the surface, an outgoing gas passageway and a return gas passageway communicating with the enclosure via non-return valves arranged to permit one way gas flow from the enclosure into the outgoing gas passageway and to permit one way gas flow from the return gas passageway into the enclosure, whereby in operation pressure imparted via the flexible wall of the enclosure to the gas within the enclosure by the passage of a water wave crest forces gas into the outgoing gas passageway and, correspondingly, as gas pressure in the enclosure falls with the passage of a water wave trough, gas is returned into the enclosure from the return gas passageway.

Dolor Espalda Y Abdomen

Síndrome postlaminectomía lumbar I: Tratamiento del dolor.. In operation, the enclosure is partially inflated with air and the device moored in the sea with the beam 3 normally submerged and the vessels 1 just breaking the surface. It is to be noted that similar effects (modification of pitching frequency and improved stability) result from the FIG. FIGS. 10 and 11 illustrate provision on the device of boat shaped ends in the form of bow 17 and stern 18. These provide a rigid wave breasting action and contain buoyancy chambers to permit modification of the pitching frequency and to improve stability. Clearly it is most convenient for the vessels 1 to contain air, but any other gas would be suitable. The beam 3 has formed in it two conduits or channels 4 and 5 which extend along the length of the beam 3. Each vessel 1 communicates with the conduit 4 and 5 via passages 6 and 7 which contain non-return valves indicated at V1 and V2, respectively (see also FIGS.

A torodial form of vessel 21 coupled via non return valves 22 in series and arranged in a draughtboard pattern in several layers is illustrated in FIG. 5. However, the linear form of FIG. Preferably the enclosure is in the form of an air vessel or bag formed from plastic coated cloth or like flexible impervious material. As a vessel 1 is compressed gas is forced into the conduit 4. As external pressure on the vessel 1 reduces with the passage of a wave trough, air returns to the vessel 1 from the return conduit 5. The vessels 1 thus function as air pumps or bellows as the sea rises and falls around them and the conduits 4 and 5 act respectively as high and low pressure air mains –the term “high” being purely relative since it will be only about 1 meter of water pressure higher than “low”. As the waves pass along the device, each vessel 1 will in turn be subjected to compression as wave crests pass and reduced pressure as wave troughs pass.

  • The direction of the wind
  • Debilitamiento de las piernas
  • Tratamiento del dolor multimodal y multiprofesional
  • No loss of PTO in case of tether failure

4a. As the waves pass down a channel between two beams the flexible walls move inwards towards the beam centrelines opposite a crest, which therefore tends to collapse, and outwards opposite a trough, which tends to fill. 9 arrangement with the conduit 4 at the top. In FIGS. 7 and 9 one conduit 4f and 4h respectively is in one chord of the truss 15f and 15h and the other conduit 5f and 5h respectively is in the other chord of the truss 15f and 15h. Dolor de rodilla izquierda parte interna . In FIG. The air pressure difference generated by this function of the vessels 1 in the sea is exploited in this example by driving a turbine from the high pressure conduit 4, the exhaust returning to the low pressure return conduit 5. The length of the beam 3 is sufficient to ensure that the rate of delivery of air into the conduit 4 and the rate of extraction of air from the conduit 5 are reasonably steady so as to be suitable for turbine operation.