A marine energy power generation system

Abstract

The present application relates to a kind of ocean energy power generation system, including wave energy power generation device, deep water power generation device and temperature difference energy power generation device, deep water power generation device includes communicating vessel, first water reservoir, contraction waterway, water turbine, generator and second water reservoir, wave energy power generation device includes swing plate array, transmission and speed change mechanism and drainage mechanism, temperature difference energy power generation device includes temperature difference power generation instrument;System utilizes communicating vessel to extract deep sea salt-rich seawater into low first water reservoir, then water is accelerated by contraction waterway, and the water after acceleration passes through water turbine, drives generator to generate electricity, and then flows into lower second water reservoir;Swing plate array arranged on sea surface obtains wave energy, and the water of second water reservoir is pumped to high salt field or discharged to sea by drainage mechanism through transmission and speed change mechanism;The warm end of temperature difference power generation instrument is arranged in sea wave, and cold end is arranged in contraction waterway, to provide temperature difference for thermoelectric material and generate electricity.The system is conducive to improving the stability and efficiency of ocean energy power generation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of ocean energy power generation, and particularly relates to an ocean energy power generation system. BACKGROUND

[0002] Ocean energy is used for power generation and seawater desalination, which will bring great convenience to people's life and infinite possibilities to the future world. In order to utilize ocean energy, many equipments such as piezoelectric generator, nanometer generator, telephone polymer generator, and thermoelectric couple have been developed, but many of them have not been widely used due to problems such as power generation efficiency and stability. Therefore, a system for utilizing ocean energy with high efficiency and stability is needed. SUMMARY

[0003] The present application aims to provide an ocean energy power generation system which is beneficial to improving the stability and efficiency of ocean energy power generation.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows: an ocean energy power generation system, comprising a wave energy power generation device, a deep water power generation device, and a temperature difference energy power generation device, wherein the deep water power generation device comprises a communicating vessel, a first water storage pool, a contraction water channel, a water turbine, a generator, and a second water storage pool, the wave energy power generation device comprises a swing plate array, a transmission and speed change mechanism, and a drainage mechanism, and the temperature difference energy power generation device comprises a temperature difference power generation instrument with a warm end and a cold end; the system utilizes the communicating vessel to draw deep sea salt-rich seawater into the first water storage pool at a low place, then accelerates the water through the contraction water channel, the accelerated water drives the water turbine to drive the generator to generate power, and then the water flows into the second water storage pool at a lower place; at the same time, the swing plate array arranged on the sea surface obtains wave energy, and the transmission and speed change mechanism drives the drainage mechanism to draw the water in the second water storage pool to a high place salt field or to the sea; the warm end of the temperature difference power generation instrument is arranged in the sea wave, and the cold end is arranged in the contraction water channel, so as to provide a continuous and stable temperature difference for the thermoelectric material in the temperature difference power generation instrument to generate power.

[0005] Further, the transmission and speed change mechanism comprises a transmission mechanism, a gear box, and a motion conversion mechanism, the swing plate array obtains the kinetic energy and potential energy of the wave and transmits the obtained energy to the gear box, the gear box transmits the energy to the motion conversion mechanism after speed change, and the motion conversion mechanism drives the drainage mechanism to perform drainage operation.

[0006] Further, the transmission mechanism comprises a driving gear, a transmission chain, a transmission shaft, and a transmission belt, the transmission shaft is provided with a driven gear and a driving pulley, the driving gear is installed on the swing plate array shaft, the driving gear transmits motion to the driven gear and the transmission shaft through the transmission chain, and the driving pulley of the transmission shaft transmits motion to the driven pulley of the input end of the gear box through the transmission belt.

[0007] Further, the drainage mechanism is a double-acting reciprocating pump, when the piston of the reciprocating pump moves forward, the lower one-way valve of the pump body is opened, the upper one-way valve is closed, and water is sucked into the pump body; when the piston moves backward, the lower one-way valve of the pump body is closed, the upper one-way valve is opened, and water is discharged from the pump body.

[0008] Further, the motion conversion mechanism is a crank rocker mechanism, so that the piston of the reciprocating pump can move forward and backward when the crank rotates forward and backward.

[0009] Further, the water turbine adopts a Kaplan water turbine, the water turbine is arranged at a position below 3m of the sea surface, the contraction water channel is wide in front and narrow in back and gradually reduces in height, after the deep-sea salt-rich seawater extracted by the communicating vessel enters the first water storage pool, the seawater is accelerated through the contraction water channel, and under the condition of small water head and high flow rate, the generator is driven through the gearbox to generate electricity, and the generated electricity is connected to the power grid through frequency modulation; the water flowing out of the water turbine enters the second water storage pool, so as to ensure the stable operation of the water turbine without interruption.

[0010] Further, the bottom of the second water storage pool is provided with a submersible pump, so as to avoid the problems caused by the failure of the wave power generation device.

[0011] Further, the generator adopts a squirrel-cage asynchronous generator, so as to overcome the defect that the demagnetization of the motor cannot withstand long-time operation under the condition of high temperature and vibration.

[0012] Further, the thermoelectric material of the thermoelectric generator is an iron-vanadium-tungsten-aluminum alloy, the hot end arranged in the sea wave and the cold end arranged in the contraction water channel jointly act on the iron-vanadium-tungsten-aluminum alloy to generate electricity, the generated electricity is processed through the back-to-back full-bridge AC converter for frequency modulation, and the processed electricity is connected to the power grid.

[0013] Compared with the prior art, the present application has the following beneficial effects: the present application provides a marine energy power generation system, which integrates a wave power generation device, a deep water power generation device and a temperature difference power generation device, stores potential energy by using seawater and multi-stage water storage pools, and continuously generates electricity stably even in the absence of sea waves by driving the drainage mechanism to enter water by random waves, so as to overcome the instability of marine energy power generation and improve the stability of marine energy power generation. Meanwhile, the present system perfectly matches the characteristics of low frequency and large thrust of wave energy, and the energy conversion is less during the working process, so that the present system has greater efficiency than the oscillating water column type power generation mechanism. The present system also solves the problem of high-speed low-temperature water flow required by temperature difference power generation, and has high comprehensive benefits. The implementation of the present system is less limited by terrain, and can be constructed in most marine areas, and can be easily combined with existing breakwaters, gravity dams and the like. Therefore, the present application has strong practicability and broad application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1is a system structure schematic diagram of an embodiment of the present application;

[0015] Figure 2 is a system implementation schematic diagram of an embodiment of the present application;

[0016] Figure 3 is a structure schematic diagram of a wave energy power generation device in an embodiment of the present application;

[0017] Figure 4 is a mechanical schematic diagram of a transmission and speed change mechanism in an embodiment of the present application. DETAILED DESCRIPTION

[0018] The present application will be further described below in conjunction with the drawings and embodiments.

[0019] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as would be understood by one of ordinary skill in the art to which the present application pertains.

[0020] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of a feature, step, operation, device, component, and / or combinations thereof.

[0021] As shown in Figure 1 , 2 , the present embodiment provides a marine energy power generation system, which comprises a wave energy power generation device, a deep water power generation device, and a temperature difference energy power generation device, the deep water power generation device comprises a communicating vessel 101, a first water storage pool 102, a contraction water channel 103, a water turbine 104, a generator, and a second water storage pool 105, the wave energy power generation device comprises a swing plate array 201, a transmission and speed change mechanism, and a drainage mechanism 202, and the temperature difference energy power generation device comprises a temperature difference power generation instrument 303 with a warm end 301 and a cold end 302; the system uses the communicating vessel 101 to extract deep sea salt-rich seawater into the low-lying first water storage pool 102, then accelerates the water through the contraction water channel 103, the accelerated water passes through the water turbine 104 to drive the generator to generate electricity, and then the water flows into the lower second water storage pool 105; at the same time, the swing plate array 201 arranged on the sea surface obtains wave energy, and the transmission and speed change mechanism drives the drainage mechanism 202 to extract the water in the second water storage pool 105 to the high-lying salt pan 4 or to the sea; the warm end 301 of the temperature difference power generation instrument is arranged in the sea waves, and the cold end 302 is arranged in the contraction water channel 103, so as to provide a continuous and stable temperature difference for the thermoelectric material in the temperature difference power generation instrument 303 to generate electricity.

[0022] In the present embodiment, the wave energy generating device adopts 10 sets of swing plates to form a swing plate array, and a damper is installed on the gravity swing to prevent resonance with sea wind or sea waves and damage.

[0023] As shown in Figure 3 , 4 , the transmission and speed change mechanism includes a transmission mechanism 203, a gear box 204 and a motion conversion mechanism 205. The swing plate array 201 obtains the kinetic energy and potential energy of waves and transmits the obtained energy to the gear box 204. The gear box 204 transmits the energy to the motion conversion mechanism 205 after speed change. The motion conversion mechanism 205 drives the drainage mechanism 202 to perform drainage operation. The drainage mechanism 202 is a double-acting reciprocating pump. When the piston of the reciprocating pump moves forward, the lower one-way valve of the pump body opens, and the upper one-way valve closes. Water is sucked into the pump body. When the piston moves backward, the lower one-way valve of the pump body closes, and the upper one-way valve opens. Water is discharged from the pump body.

[0024] In the present embodiment, the transmission mechanism 203 includes a driving gear 2031, a transmission chain 2032, a transmission shaft 2033 and a transmission belt 2034. The transmission shaft 2033 is provided with a driven gear 2035 and a driving pulley 2036. The driving gear 2031 is installed on the swing plate array shaft. The driving gear 2031 transmits motion to the driven gear 2035 and the transmission shaft 2033 through the transmission chain 2032. The driving pulley 2036 of the transmission shaft 2033 transmits motion to the driven pulley 2037 of the input end of the gear box 204 through the transmission belt 2034. In the present embodiment, the gear box 204 is a two-stage gear box. The motion conversion mechanism 205 is a crank rocker mechanism, which can drive the piston of the reciprocating pump to move forward and backward when the crank rotates forward and backward.

[0025] In the present embodiment, the water turbine adopts a Kaplan water turbine. The water turbine is arranged at a position below the sea surface 3m. The contraction water channel is wide in front and narrow in back, and the height gradually decreases. The deep-sea salt-rich seawater extracted by the communicating vessel enters the primary water storage pool, is accelerated through the contraction water channel, and drives the generator to generate electricity under the condition of small water head and high flow rate. The generated electricity is connected to the power grid through frequency modulation. The water flowing out of the water turbine enters the secondary water storage pool to ensure the uninterrupted and stable operation of the water turbine.

[0026] In the present embodiment, according to the principle of communicating vessel, the new chloroethylene pipe with smooth water flow and heat insulation is used to discharge low-temperature seawater below 500m into the primary water storage pool.

[0027] The water flows into the secondary water storage pool, and the pool should have enough capacity to ensure that the water turbine can operate continuously and stably. In the embodiment, a submersible pump is arranged at the bottom of the secondary water storage pool to avoid problems caused by failure of the wave power generation device.

[0028] In the embodiment, the generator is a squirrel cage asynchronous generator to overcome the defect that the demagnetization of the motor cannot withstand long-time operation under high-temperature vibration.

[0029] In the embodiment, the thermoelectric material of the thermoelectric generator is an iron-vanadium-tungsten-aluminum alloy, the hot end is arranged in the sea wave, and the cold end is arranged in the contraction water channel to jointly act on the iron-vanadium-tungsten-aluminum alloy to generate electricity. The electric energy is frequency-modulated and processed by a back-to-back full-bridge AC converter and then connected to the power grid.

[0030] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any person skilled in the art can modify or change the above-mentioned technical content to obtain equivalent embodiments. However, any simple modification, equivalent change and modification of the above-mentioned embodiments within the scope of the technical solution of the present application and in accordance with the technical essence of the present application shall still fall within the protection scope of the present application.

Claims

1. A marine energy power generation system, characterized in that, The system includes a wave energy power generation device, a deep-sea power generation device, and a thermoelectric power generation device. The deep-sea power generation device includes a communicating vessel, a primary reservoir, a converging channel, a turbine, a generator, and a secondary reservoir. The wave energy power generation device includes a swashplate array, a transmission and speed-changing mechanism, and a drainage mechanism. The thermoelectric power generation device includes a thermoelectric generator with a warm end and a cold end. The system uses the communicating vessel to draw in saline deep-sea water into the lower primary reservoir, then accelerates the water through the converging channel. The accelerated water then passes through the turbine, driving the generator to generate electricity, and then flows into the lower secondary reservoir. Simultaneously, the swashplate array deployed on the sea surface captures wave energy, and the transmission and speed-changing mechanism drives the drainage mechanism to pump water from the secondary reservoir to a higher salt pan or discharge it into the sea. The warm end of the thermoelectric generator is deployed in the waves, and the cold end is deployed in the converging channel to provide a continuous and stable temperature difference for the thermoelectric material in the thermoelectric generator to generate electricity. The transmission and speed change mechanism includes a transmission mechanism, a gearbox, and a motion conversion mechanism. The pendulum array acquires the kinetic and potential energy of the waves and transfers the acquired energy to the gearbox. After the gearbox changes speed, the energy is transferred to the motion conversion mechanism, which drives the drainage mechanism to perform drainage operations. The transmission mechanism includes a driving gear, a transmission chain, a transmission shaft, and a transmission belt. The transmission shaft is equipped with a driven gear and a driving pulley. The driving gear is mounted on the rotating shaft of the sway array. The driving gear transmits motion to the driven gear and the transmission shaft through the transmission chain. The driving pulley of the transmission shaft transmits motion to the driven pulley at the input end of the gearbox through the transmission belt. The drainage mechanism is a double-acting reciprocating pump. When the piston of the reciprocating pump moves forward, the one-way valve at the bottom of the pump body opens and the one-way valve at the top closes, and water is drawn into the pump body. When the piston moves backward, the one-way valve at the bottom of the pump body closes and the one-way valve at the top opens, and water is discharged from the pump body. The motion conversion mechanism is a crank-rocker mechanism, which can drive the piston of the reciprocating pump to move back and forth when the crank is in forward and reverse directions. The water turbine is a Kaplan turbine, located 3 meters below the sea surface. The converging channel is wide at the front and narrow at the back, with its height gradually decreasing. The deep-sea saline water pumped by the communicating vessel enters the primary reservoir and is accelerated through the converging channel. Under low head and high flow velocity conditions, it drives the generator to generate electricity, which is then connected to the power grid via frequency conversion modulation. The water flowing out of the water turbine enters the secondary reservoir to ensure uninterrupted and stable operation of the water turbine. The bottom of the secondary reservoir is equipped with a submersible pump to prevent problems caused by the failure of the wave energy power generation device. The generator adopts a squirrel-cage asynchronous generator to overcome the defect that the motor cannot withstand long-term operation under high temperature and vibration conditions due to demagnetization. The thermoelectric material of the thermoelectric generator is an iron-vanadium-tungsten-aluminum alloy. The warm end located in the ocean waves and the cold end located in the contraction channel work together to generate electricity from the iron-vanadium-tungsten-aluminum alloy. The electrical energy is processed by frequency conversion modulation through a back-to-back full-bridge AC converter and then connected to the power grid.

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