SUMMARY OF THE INVENTION Therefore, an object of the present invention is to obviate the aforesaid shortcomings of the prior art, by providing an improved wave energy converter. The Bessho system of the prior art uses one float which is secured to the coast or sea bed through a dynamic system including a mass mechanism, a restoring mechanism, and a damping mechanism, so that the energy carried by the wave is transmitted to the dynamic system through the float so as to produce specific phase differences between the float movement and the wave, which phase differences facilitate energy extraction and wave suppression. 1) The energy absorbing efficiency is high and the frequency range of the incident wave to provide a high energy absorbing efficiency is very wide as compared with that of the prior art, provided that the natural frequency of the converter including the floats is approximately tuned to the frequency of the incident wave, as illustrated by the comparison of the curves (1) through (4) of FIG.
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Recently, M. Bessho of the Japanese Defence Academy proposed a special structural system including a float (Bessho system) and experiments on the Bessho system have been undertaken at Mie Dockyard of Nippon Kokan Kabushiki Kaisha. Referring to FIGS. 2A, 2B, and 2C, the floats 1 in the wave energy converter of the invention are not connected to any fixed points, so that in response to the incident wave W, each float freely heaves, sways, and rolls under the constraints of the links. At the same time, there is mixing of the flows, which do not interfere in any way with one another since each flow conversion works at different sites in the rotor.
Dolor Espalda Al Respirar
The openings between in each case two wings, which must exist for flow-through, is closely related to the depth of the wings. The depth of the wing has a tolerance range. Full protection of the dynamic system results in an unduly high construction cost. Ocean waves cause the float to heave, to sway and to roll, and if various physical constants of the dynamic system are properly selected, the natural frequency of the fluid-float system can be tuned to that of the incident wave.
Among the different forms of ocean energy, wave energy exists abundantly, but its exploitation for practical use has been limited to only a few examples such as buoy-type electric generating units of several ten watts to energize the lamps of nautical markers. The rotation of the air turbine is transmitted to an electric generator for producing electric energy. Each of the aforesaid complex amplitudes for the 3-float system can be determined by equations of motion in a manner similar to that used for the 2-float system. FIGS. 3C(A) and 3C(B) show how the system of FIG. The curve (1) of FIG. The physical constants of various elements of the dynamic system are such that the reflected waves and the transmitted waves caused by the float are reduced substantially to zero.
Referring to FIG. Dolor muscular en brazo derecho . 7 and using this system, the amplitude of the transmitted wave behind the float group of the converter becomes very small. Referring to FIG. 5, two viscous damping means 4 are disposed between the floats L, R and the link 2, so as to extract the wave energy by using the relative rotational speed differences among the two floats and the link. Two floats 1, 1 are pivotally connected to a link 2 and restoring means 3 and damping means 4 are provided between the link 2 and each float 1 as shown in the figure. In general, when the incident wave acts upon the float, the float sways, heaves, and rolls.
Tipos De Dolor Pdf
The principles of the invention to effectively extract wave energy through the movement of the floats 1 will be now explained in detail. A practical example of the wave energy converter of the invention will now be considered. The invention is described in greater detail below by means of an example. FIGS. 3A, 3B, 3C(A) and 3C(B) depict one example of a dynamic system to convert mechanical energy extracted from the wave to electrical energy. Since the fluid-float system has only one natural frequency, the energy absorbing efficiency can be maximized as long as the one natural frequency of the fluid-float system is tuned to the major frequency of the incident wave, but when the nature of the incident wave is changed due to variations of the meteorological conditions or other causes, the major frequency of the incident wave fluctuates and the energy absorbing efficiency is reduced greatly. Radiated wave: the wave generated in response to sinusoidal movement of one of the float.