Device for obtaining energy from water

Abstract: A floating number (8), subjected to the movement of waves and acting on a piston (3), makes a magnetic element (6) reciprocate within a winding (7), to produce electrical energy.

Description: Systems are known for obtaining energy from moving water, especially from sea waves. Mostly such systems are only feasible if a minimum wave height occurs. A very small wave height or a light swell mostly is insufficient to obtain a sufficient yield. Systems to obtain energy from changes in the water level in sea or lakes are known for example from FR-A-2,607,870; FR-A-2,509,800 and FR-A-2,073,588. It is the object of the invention to provide a device having such a yield that also energy contained in moving water with a very small wave height can be obtained. This is achieved by providing a device for obtaining energy from water according to claim 1. The device according to the invention utilises the swell as well as very high waves in obtaining energy. In a smooth sea with a light swell the floating element will move up and down together with the water level and during this movement the vertically movable piston element will reciproke up and down. In high waves the water will be supplied directly under the piston element and will drive said piston element in a vertically reciprocal movement. The yield is considerably increased if the apertures are connected to ducts inserting into the water. Through the ducts large volumes of water are supplied during high waves, which increases the upwardly directed force against the piston element. Around the cylindrical member an annular winding of an electric generator is applied. The invention is elucidated with the help of the drawings. Figure 1 shows a isometric view of an embodiment of the device according to the invention, figure 2 shows a sectional view of the device according to figure 1, and figure 3 shows an alternative embodiment in section. Anchored by means of for example a chain 1 the cylindrical member 2 is vertically positioned. Within the cylindrical member a piston element 3 is vertically reciprocally movable. Spaced under the piston element a spherical floating member 4 is provided. By means of a piston rod 5 the piston is connected to a cylindrical magnetical element 6, which generates a voltage in a winding 7 which is annularly applied around the cylindrical member. The cylindrical member 2 is open at the underside. Due to the movement of the floating member 4 which moves with the swell, the piston 3 is pushed upwardly by means of the floating member 4 contacting the piston 3. Due to the weight of the piston 3 the piston moves downwardly so that a reciprocal movement is obtained. Through second apertures 8, which are connected to each a water supply duct 9, water is directly supplied to the cylinder 2 if there are high waves. The volume of water is directly applying to the piston 3 and moves the piston in upward direction. The operation of the floating member is of less importance under these circumstances. As shown in figure 3 apertures 10 are provided in the cylindrical wall which are connected to a reservoir 11. The water flowing back after a wave is therefore supplied to the reservoir 11. During a very smooth sea the water contained in the reservoir 11 can be used for driving an electrical generator.

Claims: Device for obtaining energy from water, consisting of a cylindrical member (2) which is vertically positioned in water and open in the underside, a piston element (3) which is vertically reciprocally movable in said cylindrical member (2), a magnetic cylindrical element (6) mounted on the upper side of said piston element, a free floating member (4) provided vertically below said piston element (3), and apertures (8) between the piston element (3) and the floating member (4), whereby along the trajectory of said cylindrical element a winding (7) of an electrical generator for producing electrical energy is provided. Device according to claim 1, characterised in that said apertures (8) are connected to ducts (9) inserted in water. Device according to claims 1-2, characterised in that the floating member (4) is spherical. Device according to claims 1-3, characterised in that apertures (8) are provided in the wall of the cylindrical member. Device according to claims 1-4, characterised in that apertures (10) are provided in the wall of the cylindrical member being connected to a reservoir (9).

Inventors: DOLEH ZAKARIA KALIL, DOLEH, ZAKARIA KALIL
Applicants: DOLEH ZAKARIA KALIL, DOLEH, ZAKARIA KALIL
Application year: 1989
Main classification: F03B13
IPC codes: F03B13