The heave motion describes the z-axis (or up and down) motion of the wave and as such it has a very high correlation with the vertical energy within a 30 wave. In the present invention heave response may also be used to ‘tune’ the operational 25 frequencies, such that frequencies below its tuned frequency will experience minimal attenuation. This mass also helps to keep the wave energy converting apparatus 44 in an upright orientation due to the low centre of buoyancy and low centre of mass given to the system by the base 56. As the mass of the vessel 55 25 decreases the resonant frequency of the system increases. As each wave crest passes the buoyancy of the neutrally buoyant mooring caddy 80 will drop to negative buoyancy as the hydrostatic pressure increases. This feature is particularly useful when applied to the ocean, as the energy available within ocean waves 15 increases the lower the frequency.
Another advantageous aspect of the apparatus 10 is that it can be engineered 10 to be responsive, for electric power generation, to a specific wave frequency range. With the frequency tuning ability of the apparatus 10, it is possible to extract energy from the predefined frequencies only, while simply letting the destructive high energy density waves pass without attenuation. Air inside the hollow vessel 55 of the counterbalancing means 53 need not be expelled to ambient ocean but could be pumped back up to a pressure vessel (not shown) housed within the mooring caddy 80 or submerged member 46. 30 A typical operating sequence for the tension mooring system 50 will now be described with reference to Figures 8 to 11: – 20 Given a particular operational environment the control system 92 will measure and calculate, via appropriate means such as an accelerometer, the wave frequencies which are presented to the system.
The commissioning of the system will be such that the mooring means 60 will be set, which includes the ballast 62 and the counterbalancing means 64. The counterbalancing means 64 will be left in its buoyant state until such time as the apparatus 10 is ready to be 20 commissioned. The support structure 45 of this embodiment is also provided with a buoyant means to enable the support structure to float in the ocean in a generally upright orientation. In this embodiment 20 the mooring caddy 80 is mounted directly to the underside of a buoyant canister 122. There is no linear electric generator as in the previous embodiments.
- Podría mejorar la salud mental
- Tratar de mantener la espalda recta al permanecer sentado por tiempo prolongado
- Aliviar el dolor de garganta
- Use crush washers to seal connection to center housing water ports
- Los brazos y la espalda deben estar en una posición que no cause dolor
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In this embodiment the mooring means is implemented in the form of a mooring caddy 72, in which the PBSM 14 of the support structure 12 is 20 adapted to dock in use. Preferably the buoyancy of the counterbalancing means can be adjusted by moving a fluid into and out of the buoyancy vessel via a fluid transport mechanism.