WAVE-WIND MUTUALLY SUPPLEMENTING POWER SUPPLY SYSTEM FOR CONTINUOUS POWER GENERATION

Abstract

A wave-wind mutually supplementing power supply system for continuous power generation is disclosed. The system of the present invention has a wave kinetic energy module (10), which comprises a wave energy harnessing unit (100), a transmission shaft (110), a generator unit (120), a torque adjusting unit (130) and an automatic control unit (140). The wave kinetic energy module (10) is disposed on/in a sea and may generate electricity through the motion of sea water. The electricity so generated is combined with a wind power generation device to provide continuous power generation. The automatic control unit (140) has a microprocessor (141) and a sea water motion sensor unit (142) so as to adjust the torque of the transmission shaft and control the activation of the generator unit according to the motion of the sea water.

Claims

1. A wave-wind mutually supplementing power supply system for continuous power generation, comprising: a wave kinetic energy module, which is disposed on/in a sea and may generate electricity through the motion of sea water, characterized in that the electricity so generated is combined with a wind power generation device for continuous power generation, and characterized in that: the wave kinetic energy module comprises a wave energy harnessing unit, a transmission shaft, a generator unit, a torque adjusting unit and an automatic control unit, wherein the wave energy harnessing unit may harness the kinetic energy generated through the motion of sea waves and the transmission shaft may transmit the kinetic energy harnessed by the wave energy harnessing unit to the generator unit, and wherein the generator unit may receive the kinetic energy transmitted from the transmission shaft and convert it to electricity and the torque adjusting unit is disposed on the transmission shaft so as to adjust the torque of the latter, and wherein the automatic control unit has a microprocessor and a sea water motion sensor unit so as to control the activation of the generator unit and adjust the torque of the transmission shaft according to the motion of the sea water.

2. The system as in claim 1, wherein the wave energy harnessing unit has a float unit, a central ball screw or a central toothed rod, a bevel gear and two one-directional bevel gear pieces, characterized in that the float unit is connected with a central ball screw or a central toothed rod and the central ball screw is connected with a bevel gear, which engages with and drives the two one-directional bevel gear pieces, and characterized in that the two one-directional bevel gear pieces are linked with the transmission shaft so that as the float unit moves up and down with the sea water, the two one-directional bevel gear pieces move in opposite directions, which cause the transmission shaft to rotate in a single direction to drive the generator unit.

3. The system as in claim 1, wherein the generator unit comprises two generators with different wattages, characterized in that when sea waves move in smaller amplitudes, the automatic control unit would only activate the generator with the smaller wattage so as to achieve higher power generation efficiency at lower torques, and characterized in that when sea waves move in larger amplitudes, the automatic control unit would switch to activate the generator with the larger wattage so as to achieve higher power generation efficiency at higher torques, and characterized in that as sea waves move in even larger amplitudes, the automatic control unit would activate both of the two generators.

4. The system as in claim 3, wherein both of the two generators are coreless disk type generators.

5. The system as in claim 3, wherein the generator unit comprises two generators with different wattages: a 200 KW generator and a 300 KW generator, characterized in that when sea wave height is less than 1.5 meters, the automatic control unit would only activate the 200 KW generator, and characterized in that when sea wave height is between 1.5 and 3.0 meters, the automatic control unit would only activate the 300 KW generator, and characterized in that as wave height exceeds 3.0 meters, the automatic control unit would activate both of the 200 KW and 300 KW generators.

6. The system as in claim 1, wherein the torque adjusting unit is a continuous torque varying device or an rpm enhancing device, and wherein a torque meter is mounted on the transmission shaft and may measure the torque values of the transmission shaft and pass the numerical values to the automatic control unit, which may in turn automatically adjust the rpm of the transmission shaft.

7. The system as in claim 6, wherein the automatic control unit is provided with an electronic stabilizer, which is electrically linked with the torque adjusting unit and may stabilize the rpm of the torque adjusting unit.

8. The system as in claim 1, wherein the sea water motion sensor unit may be a sea water motion data collecting float, which may collect motion data of sea water.

9. The system as in claim 1, wherein the sea water motion sensor unit may be a linear displacement sensor, which may measure and record the vertical displacements of sea water.

10. The system as in claim 1, wherein optionally, the sea water motion sensor unit may be an ultrasonic wave height meter or a laser wave height meter, which use ultrasonic or laser signals to measure the vertical displacements of sea water.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG. 1 is a diagram schematically illustrating the system of the present invention.

[0023] FIG. 1a is a perspective view of the wave energy harnessing unit, which is provided with a ball screw.

[0024] FIG. 1b is a perspective view of the wave energy harnessing unit, which is provided with a toothed rod.

[0025] FIG. 2 is a view schematically illustrating how the wave kinetic energy module of the present invention is used with the facilities of wind power generation.

[0026] FIG. 3 is a diagram illustrating two generators with different wattages can harness a broader range of energy in the present invention.

[0027] FIG. 4 is a diagram illustrating a single generator may extract energy from a limited, narrower range of energy in the prior art.

[0028] FIGS. 5 to 7 illustrate how wave height, wind velocity and wind direction vary in the same 1,500-hour period.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0029] The wave-wind mutually supplementing power supply system of the present invention, as illustrated in FIGS. 1 and 2, has a wave kinetic energy module 10. The wave kinetic energy module 10 is disposed on/in a sea and may generate electricity through the motion of sea water 30. The electricity so generated is combined with a wind power generation device 20 for continuous power generation. The wave kinetic energy module 10 may be installed at the same site where an existing wind power generation device 20 is disposed, hence sharing the same underwater cables and eliminating additional land acquisition cost and construction cost. Furthermore, electricity needed in after-installation periodic maintenance may be drawn from the existing wind power generation device 20.

[0030] The wave kinetic energy module 10 comprises a wave energy harnessing unit 100, a transmission shaft 110, a generator unit 120, a torque adjusting unit 130 and an automatic control unit 140.

[0031] The wave energy harnessing unit 100 is placed near the surface of a sea 30 to harness the kinetic energy generated through the motion of sea waves.

[0032] The transmission shaft 110 may transmit the kinetic energy generated by the wave energy harnessing unit 100 to the generator unit 120 so as to generate electricity.

[0033] The generator unit 120 may receive the kinetic energy transmitted from the transmission shaft 110 and convert it to electricity.

[0034] The torque adjusting unit 130 is mounted on the transmission shaft 110 so as to adjust the torque of the latter.

[0035] The automatic control unit 140 has a microprocessor 141 and a sea water motion sensor unit 142 so as to adjust the torque of the transmission shaft 110 and control the activation of the generator unit 120 according to the motion of the sea water 30.

[0036] In addition, the wave energy harnessing unit 100 has a float unit 101. The float unit 101 is submerged into a sea and may move in sync with the sea water 30 so as to extract the kinetic energy from the sea waves. The float unit 101 is connected with a central ball screw 102, which may move in sync with the float unit 101. The central ball screw 102 is connected with a bevel gear 103, which engages with two one-directional bevel gear pieces 104, which rotate in opposite directions and are linked with the transmission shaft 110. In such manner, as the float unit 101 moves up and down with the sea water 30, the central ball screw 102 moves in sync with the float unit 101 and then such vertical motion passes through the bevel gear 103 to the two one-directional bevel gear pieces 104, which cause the transmission shaft 110 to rotate in a single direction. Then, such rotation may drive the generator unit 120. Because the sea water 30 moves on a constant basis, the generator unit 120 can be driven on a constant basis. In addition, such power supply system is used with a wind power generation device 20 so as to improve and stabilize electricity output.

[0037] Now, please see FIG. 1a. The central ball screw 102 comprises a nut portion 1021 and a body portion 1022. The nut portion 1021 is connected with the float unit 101 via several connective rods 1023. The body portion 1022 is connected with the bevel gear 103. In such manner, the nut portion 1021 is driven by the float unit 101 and thus moves in a linear manner; the body portion 1022 and thus the bevel gear 103 may move in a rotational manner.

[0038] The reasons for the choice of the ball screw 102 are its higher levels of stability and strength, which may maximize the power generation efficiency. Alternatively, a toothed rod, as illustrated in FIG. 1b, may be used. In FIG. 1b, the float unit 101 is connected with a toothed rod 105, which may drive a cogwheel 103.

[0039] In either case, the two one-directional bevel gear pieces 104 are allowed to rotate in opposite directions. Therefore, it does not matter whether the float unit 101 moves upward or downward, one of the two one-directional bevel gear pieces 104 would be driven so as to achieve a higher efficiency.

[0040] Please refer to FIG. 3 now. The generator unit 120 comprises two coaxially disposed generators: a 200 KW generator and a 300 KW generator. When wave height is less than 1.5 meters and sea waves move in smaller amplitudes, the automatic control unit 140 would only activate the 200 KW generator so as to achieve higher power generation efficiency at lower torques. When wave height is between 1.5 meters and 3.0 meters and sea waves move in larger amplitudes, the automatic control unit 140 would switch to activate the 300 KW generator so as to achieve higher power generation efficiency at higher torques. As wave height exceeds 3.0 meters and sea waves move in even larger amplitudes, the automatic control unit 140 would activate both of the 200 KW and 300 KW generators or optionally, activate a single 500 KW generator.

[0041] FIGS. 3 and 4 illustrate the wave energy spectrum and wave spectral density of sea waves. In the prior art, as illustrated in FIG. 4, a single generator extracts energy from a limited range of energy. In contrast, in the present invention, as illustrated in FIG. 3, the generator unit comprises two generators: a 200 KW generator and a 300 KW generator, which may be selectively activated by the automatic control unit 140 according to different wave heights. Therefore, by a simple inspection of FIGS. 3 and 4, we can see that the generator unit of the present invention may extract more energy from sea waves.

[0042] Both of the two generators of the generator unit 120 may be coreless disk type generators to reduce wear and tear and lessen maintenance. Also, regular low-rpm generators may be used.

[0043] The torque adjusting unit 130 is a continuous torque varying device 131, which may adjust to vary rpm and torque. A torque meter 143 is mounted on the transmission shaft 110 and may measure the torque values of the transmission shaft 110 and pass the numerical values to the automatic control unit 140, which may in turn automatically adjust the rpm of the transmission shaft 110. The torque adjusting unit 130 may also be an rpm enhancing device.

[0044] The automatic control unit 140 is provided with an electronic stabilizer 144, which is electrically linked with the torque adjusting unit 130 and may stabilize the rpm of the torque adjusting unit 130 when the motion of sea waves changes abruptly.

[0045] There are many types of the sea water motion sensor unit 142 and one or several types of such sensors may be used. The sea water motion sensor unit 142 may be a sea water motion data collecting float unit 1421, which may be used to collect motion data of sea water 30.

[0046] Furthermore, the sea water motion sensor unit 142 may be a linear displacement sensor 1422, which may measure and record the vertical displacements of sea water 30.

[0047] Moreover, the sea water motion sensor unit 142 may be an ultrasonic wave height meter or a laser wave height meter 1423, which uses ultrasonic or laser signals to measure the vertical displacements of sea water 30.

[0048] Many changes and modifications in the above described embodiment of the invention can, of course, be carried out without departing from the scope thereof. Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by the scope of the appended claims.