Shore-based wave power generation device capable of accelerating pipeline airflow and control method

Abstract

The invention relates to the technical field of wave energy power generation devices, in particular to a shore-based wave energy power generation device capable of accelerating pipeline airflow and a control method.The shore-based wave energy power generation device comprises a wave energy receiving part which is a semi-closed air chamber, and a water passing opening is formed in the bottom of the side, making contact with seawater, of the air chamber; a photovoltaic energy storage unit and an air pump are arranged on the top surface of the outer wall of the air chamber, and the photovoltaic energy storage unit is connected with the air pump; the energy conversion part is connected with the wave energy receiving part and comprises a plurality of pipelines arranged at the top of the air chamber, valves are arranged at the joints of the pipelines and the air chamber, turbines are arranged in the pipelines, and a generator is arranged on the side, away from the air chamber, of each turbine; the monitoring module is connected with the wave energy receiving part and the energy conversion part; and the control module is connected with the wave energy receiving part, the energy conversion part and the monitoring module, the flow speed of pipeline airflow is increased, and the power generation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wave energy power generation devices, and in particular to a shore-based wave energy power generation device capable of increasing pipeline airflow speed and a control method thereof. Background Art

[0002] Wave energy power generation mainly uses wave energy conversion devices to convert wave energy contained in seawater into electrical energy. For oscillating wave energy power generation devices, the principle is mainly to use the up and down oscillation of waves to drive the mechanical structure inside the device, and then convert it into electrical energy. The device mainly has an air chamber, the lower opening of the air chamber is immersed in seawater, so that seawater can freely enter the air chamber. When the waves move towards the empty box, it will push the water level in the box up or down, thereby changing the air pressure in the box, causing the gas to enter and exit at high speed through the inlet and outlet holes, driving the turbine to rotate, and finally converting it into electrical energy.

[0003] China Patent Publication (Announcement) No.: CN107956631 B, discloses a one-way flow airflow channel system for an oscillating water column wave energy power generation device, characterized in that it includes 4 liquid seal chambers, a one-way ventilation pipe, and a pipe network; each of the liquid seal chambers is provided with two ventilation pipes, respectively recorded as an upper pipe and a lower pipe; the upper pipe is the outlet pipe of the gas chamber above the liquid surface of the liquid seal chamber, and the lower pipe refers to a pipe with one end of the pipe mouth inserted under the liquid surface of the liquid seal chamber. It can be seen that the existing technology cannot improve the power generation efficiency when the wave energy is low. Summary of the invention

[0004] To this end, the present invention provides a shore-based wave energy power generation device and a control method capable of increasing airflow in a speed duct, so as to overcome the problem in the prior art that the power generation efficiency cannot be improved when the wave energy is low.

[0005] To achieve the above-mentioned object, the present invention provides a shore-based wave energy power generation device capable of increasing pipeline airflow and a control method, comprising:

[0006] The wave energy receiving part is a semi-enclosed air chamber, which is arranged on the shore and half submerged in the seawater, a water inlet is arranged at the bottom of the side of the air chamber in contact with the seawater, and a photovoltaic energy storage unit and an air pump are arranged on the top surface of the outer wall of the air chamber, wherein the photovoltaic energy storage unit is connected to the air pump;

[0007] An energy conversion unit connected to the wave energy receiving unit comprises a plurality of pipes arranged on the top of the air chamber, a valve is arranged at the connection between the pipes and the air chamber, a turbine is arranged inside the pipes, a generator is arranged on the side of the turbine away from the air chamber, wherein the generator is connected to the turbine by an axis;

[0008] A monitoring module, which is connected to the wave energy receiving part and the energy conversion part respectively, and includes a water flow monitoring unit arranged at the water inlet to monitor the water inlet flow rate, an air pressure monitoring unit arranged at the top of the air chamber to monitor the characteristic value of air pressure change, and an air flow monitoring unit arranged at the pipeline inlet to monitor the average air flow rate;

[0009] A control module is respectively connected to the wave energy receiving part, the energy conversion part and the monitoring module, and is used to determine the power generation strategy of the power generation device according to the water inlet flow rate of the water outlet, determine whether to start the air pump according to the characteristic value of the air pressure change in the air chamber, and determine the pipeline operation mode according to the average air flow rate in a plurality of pipelines.

[0010] Furthermore, an air outlet pipe of the air pump passes through the top surface of the air chamber and extends into the interior of the air chamber.

[0011] Furthermore, the control module determines that the power generation device does not generate electricity under the condition that the water inlet flow rate is less than a first preset water flow rate.

[0012] Furthermore, the control module determines a power generation strategy of the power generation device under the condition that the water inlet flow rate is greater than or equal to the first preset water flow rate, wherein:

[0013] If the water inlet flow rate is greater than or equal to the first preset water flow rate and less than the second preset water flow rate, the power generation strategy is determined to determine whether to turn on the air pump according to the characteristic value of the air pressure change in the air chamber;

[0014] If the water inlet flow rate is greater than or equal to the second preset water flow rate, the power generation strategy is determined to determine the pipeline operation mode according to the average air flow rate in a plurality of pipelines.

[0015] Furthermore, the control module determines to start the air pump under the condition that the air pressure change characteristic value is less than a preset air pressure change characteristic value.

[0016] Furthermore, the control module adjusts the valve closure quantity according to the difference between the preset airflow rate and the average airflow rate under the condition that the average airflow rate is less than the preset airflow rate.

[0017] Furthermore, the valve closure quantity is positively correlated with the airflow rate difference, wherein the airflow rate difference is the difference between the preset airflow rate and the average airflow rate.

[0018] Furthermore, the control module maintains the valve in a fully open state under the condition that the average airflow rate is greater than or equal to the preset airflow rate.

[0019] The present invention also provides a control method for a shore-based wave energy power generation device capable of increasing pipeline airflow, comprising:

[0020] Real-time monitoring of the water inlet flow rate of the air chamber, the characteristic value of the air pressure change inside the air chamber, and the average air flow rate in several pipes;

[0021] The power generation strategy of the power generation device is determined according to the water inlet flow rate, including determining whether to turn on the air pump according to the characteristic value of the air pressure change in the air chamber, or determining the operation mode of the pipeline according to the average air flow rate in several pipelines.

[0022] Compared with the prior art, the beneficial effect of the present invention lies in that, based on the oscillating water column wave energy power generation device, the present invention arranges multi-channel power generation, and flexibly adjusts the opening and closing of the pipeline by monitoring the average air flow rate in the pipeline, thereby increasing the air flow rate in the pipeline and improving the power generation efficiency.

[0023] Furthermore, the present invention is provided with a photovoltaic energy storage unit and an air pump, which converts solar energy into electrical energy to power the air pump through photovoltaic panels, and determines to start the air pump when the wave energy is insufficient according to the characteristic value of the air pressure change, thereby increasing the air pressure in the air chamber, thereby improving the power generation efficiency and enhancing the environmental adaptability and operation stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of a shore-based wave energy power generation device capable of increasing the speed of pipeline airflow according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of a pipeline according to an embodiment of the present invention;

[0026] Figure 3 It is a flow chart of a control method of a shore-based wave energy power generation device capable of increasing the speed of pipeline airflow according to an embodiment of the present invention;

[0027] Figure 4 A flow chart for determining a power generation strategy for a power generation device according to an embodiment of the present invention;

[0028] In the figure: 1. air chamber; 2. water outlet; 3. photovoltaic panel; 4. air pump; 5. pipeline; 6. turbine; 7. generator; 8. outlet pipe; 9. flow meter; 10. electronic barometer; 11. flow rate sensor; 12. valve. DETAILED DESCRIPTION

[0029] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0031] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0032] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] See also Figures 1 to 4 As shown, they are respectively a structural schematic diagram of a shore-based wave energy power generation device capable of increasing the speed of pipeline airflow according to an embodiment of the present invention; a schematic diagram of the internal structure of a pipeline according to an embodiment of the present invention; a flow chart of a control method for a shore-based wave energy power generation device capable of increasing the speed of pipeline airflow according to an embodiment of the present invention; and a flow chart of determining a power generation strategy for a power generation device according to an embodiment of the present invention.

[0034] The shore-based wave energy power generation device capable of increasing the airflow in a pipeline according to the embodiment of the present invention comprises:

[0035] The wave energy receiving part is a semi-enclosed air chamber 1, which is arranged on the shore and half submerged in the seawater. A water inlet 2 is arranged at the bottom of the side of the air chamber 1 in contact with the seawater, and a photovoltaic energy storage unit and an air pump 4 are arranged on the top surface of the outer wall of the air chamber 1, wherein the photovoltaic energy storage unit is connected to the air pump 4;

[0036] An energy conversion part, which is connected to the wave energy receiving part, comprises a plurality of pipes 5 arranged on the top of the air chamber 1, a valve 12 is arranged at the connection between the pipes 5 and the air chamber 1, a turbine 6 is arranged inside the pipes 5, a generator 7 is arranged on the side of the turbine 6 away from the air chamber 1, wherein the generator 7 is connected to the turbine 6 by an axis;

[0037] A monitoring module, which is connected to the wave energy receiving part and the energy conversion part respectively, comprises a water flow monitoring unit arranged at the water inlet 2 for monitoring the water inlet flow rate, an air pressure monitoring unit arranged at the top of the air chamber 1 for monitoring the characteristic value of air pressure change, and an air flow monitoring unit arranged at the inlet of the pipeline 5 for monitoring the average air flow rate;

[0038] A control module is respectively connected to the wave energy receiving part, the energy conversion part and the monitoring module, and is used to determine the power generation strategy of the power generation device according to the water inlet flow rate of the water port 2, determine whether to start the air pump 4 according to the characteristic value of the air pressure change in the air chamber 1, and determine the operation mode of the pipeline 5 according to the average air flow rate in the plurality of pipelines 5.

[0039] Specifically, the top surface of the air chamber 1 is higher than the highest tide level, and the bottom surface of the air chamber 1 is lower than the lowest tide level.

[0040] Specifically, the highest point of the water outlet 2 is lower than the lowest tide level.

[0041] Specifically, the photovoltaic energy storage unit includes a photovoltaic panel 3, a solar charging controller and a battery, wherein the solar charging controller is connected to the photovoltaic panel 3, and the battery is connected to the solar charging controller.

[0042] Specifically, the air pump 4 is connected to the battery in the photovoltaic energy storage unit.

[0043] Specifically, the valve 12 is, for example, a solenoid valve or a control valve, and is not specifically limited thereto, as long as the control module can control the opening and closing of the valve 12 .

[0044] Specifically, the air outlet pipe 8 of the air pump 4 passes through the top surface of the air chamber 1 and extends into the interior of the air chamber 1 .

[0045] Specifically, the turbine 6 is a Wells turbine.

[0046] Specifically, the water flow monitoring unit is a flow meter 9 .

[0047] Specifically, the air pressure monitoring unit is an electronic barometer 10 .

[0048] Specifically, the airflow monitoring unit is a flow velocity sensor 11 .

[0049] Specifically, the control module determines the power generation strategy of the power generation device according to the water inlet flow rate, wherein:

[0050] Determining that the power generation device does not generate electricity under the condition that the water inlet flow rate is less than the first preset water flow rate of 0.1 m / s;

[0051] Under the condition that the water inlet flow rate is greater than or equal to the first preset water flow rate and less than the second preset water flow rate of 0.3 m / s, determining whether to start the air pump 4 according to the characteristic value of the air pressure change in the air chamber 1;

[0052] Under the condition that the water inlet flow rate is greater than or equal to the second preset water flow rate, the operation mode of the pipeline 5 is determined according to the average air flow rate in the plurality of pipelines 5 .

[0053] In the embodiment of the present invention, the first preset water flow rate is 0.1 m / s, and the second preset water flow rate is 0.3 m / s, but the above values ​​are not limited thereto, and those skilled in the art may adjust the values ​​according to actual needs.

[0054] Specifically, the control module determines to turn on the air pump 4 under the condition that the air pressure change characteristic value is less than the preset air pressure change characteristic value 0.65; and does not turn on the air pump 4 under the condition that the air pressure change characteristic value is greater than or equal to the preset air pressure change characteristic value.

[0055] Specifically, the pressure change characteristic value is determined by the average pressure fluctuation frequency and the average pressure fluctuation amplitude within a preset time of 5 minutes, and is calculated by the following formula:

[0056]

[0057] Among them, T is the preset time length, T is set to 5 minutes, N is the number of fluctuations, α is the first evaluation coefficient, α is set to 0.54, A is the maximum value of a single fluctuation air pressure, a is the minimum value of a single fluctuation air pressure, β is the second evaluation coefficient, and β is set to 0.47.

[0058] In the embodiment of the present invention, the preset air pressure change characteristic value is 0.65, but the above value is not limited thereto, and those skilled in the art can adjust the value according to actual needs.

[0059] Specifically, the control module adjusts the closing amount of the valve 12 according to the difference between the preset airflow rate and the average airflow rate under the condition that the average airflow rate is less than the preset airflow rate of 10 m / s.

[0060] In the embodiment of the present invention, the preset air flow rate is 10 m / s, but the above value is not limited thereto, and those skilled in the art can adjust the value according to actual needs.

[0061] Specifically, the control module adjusts the closing amount of the valve 12 according to the airflow rate difference, wherein:

[0062] If the airflow rate difference is less than the preset airflow rate difference of 3 m / s, the closing quantity of the valve 12 is adjusted to a corresponding value using the first quantity adjustment coefficient of 0.3;

[0063] If the airflow rate difference is greater than or equal to the preset airflow rate difference, the closing quantity of the valve 12 is adjusted to a corresponding value using a second quantity adjustment coefficient of 0.6;

[0064] The airflow rate difference is the difference between the preset airflow rate and the average airflow rate.

[0065] In the embodiment of the present invention, the preset air flow rate difference is 3 m / s, but the above value is not limited thereto, and those skilled in the art can adjust the value according to actual needs.

[0066] Specifically, if the result of multiplying the quantity adjustment coefficient by the number of valves 12 is not an integer, it is rounded down.

[0067] Specifically, the control module maintains the valve 12 in a fully open state under the condition that the average airflow rate is greater than or equal to the preset airflow rate.

[0068] The control method of the shore-based wave energy power generation device capable of increasing the airflow in the pipeline according to the embodiment of the present invention comprises:

[0069] Step S1, real-time monitoring of the water inlet flow rate of the water inlet 2 of the air chamber 1, the characteristic value of the air pressure change inside the air chamber 1, and the average air flow rate in the pipeline 5;

[0070] Step S2, determining the power generation strategy of the power generation device according to the water inlet flow rate, including determining whether to turn on the air pump 4 according to the characteristic value of the air pressure change in the air chamber 1, or determining the operation mode of the pipeline 5 according to the average air flow rate in several pipelines 5.

[0071] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shore-based wave energy power generation device capable of increasing the airflow in a pipeline, characterized in that: include: The wave energy receiving part is a semi-enclosed air chamber, which is arranged on the shore and half submerged in the seawater, a water inlet is arranged at the bottom of the side of the air chamber in contact with the seawater, and a photovoltaic energy storage unit and an air pump are arranged on the top surface of the outer wall of the air chamber, wherein the photovoltaic energy storage unit is connected to the air pump; An energy conversion unit connected to the wave energy receiving unit comprises a plurality of pipes arranged on the top of the air chamber, a valve is arranged at the connection between the pipes and the air chamber, a turbine is arranged inside the pipes, a generator is arranged on the side of the turbine away from the air chamber, wherein the generator is connected to the turbine by an axis; A monitoring module, which is connected to the wave energy receiving part and the energy conversion part respectively, and includes a water flow monitoring unit arranged at the water inlet to monitor the water inlet flow rate, an air pressure monitoring unit arranged at the top of the air chamber to monitor the characteristic value of air pressure change, and an air flow monitoring unit arranged at the pipeline inlet to monitor the average air flow rate; A control module is respectively connected to the wave energy receiving part, the energy conversion part and the monitoring module, and is used to determine the power generation strategy of the power generation device according to the water inlet flow rate of the water outlet, determine whether to start the air pump according to the characteristic value of the air pressure change in the air chamber, and determine the pipeline operation mode according to the average air flow rate in a plurality of pipelines.

2. The shore-based wave energy power generation device capable of accelerating pipeline airflow according to claim 1 is characterized in that: The air outlet pipe of the air pump passes through the top surface of the air chamber and extends into the interior of the air chamber.

3. The shore-based wave energy power generation device capable of accelerating pipeline airflow according to claim 1, characterized in that: The control module determines that the power generation device does not generate electricity under the condition that the water inlet flow rate is less than the first preset water flow rate.

4. The shore-based wave energy power generation device capable of accelerating pipeline airflow according to claim 3 is characterized in that: The control module determines the power generation strategy of the power generation device under the condition that the water inlet flow rate is greater than or equal to the first preset water flow rate, wherein: If the water inlet flow rate is greater than or equal to the first preset water flow rate and less than the second preset water flow rate, the power generation strategy is determined to determine whether to turn on the air pump according to the characteristic value of the air pressure change in the air chamber; If the water inlet flow rate is greater than or equal to the second preset water flow rate, the power generation strategy is determined to determine the pipeline operation mode according to the average air flow rate in a plurality of pipelines.

5. The shore-based wave energy power generation device capable of accelerating pipeline airflow according to claim 1, characterized in that: The control module determines to start the air pump under the condition that the air pressure change characteristic value is less than a preset air pressure change characteristic value.

6. The shore-based wave energy power generation device capable of accelerating pipeline airflow according to claim 1, characterized in that: The control module adjusts the valve closing amount according to the difference between the preset airflow rate and the average airflow rate under the condition that the average airflow rate is less than the preset airflow rate.

7. The shore-based wave energy power generation device capable of accelerating pipeline airflow according to claim 6, characterized in that: The valve closure quantity is positively correlated with the air flow rate difference, wherein the air flow rate difference is the difference between the preset air flow rate and the average air flow rate.

8. The shore-based wave energy power generation device capable of accelerating pipeline airflow according to claim 6, characterized in that: The control module maintains the valve in a fully open state under the condition that the average airflow rate is greater than or equal to the preset airflow rate.

9. The control method of a shore-based wave energy power generation device capable of increasing the speed of pipeline airflow according to any one of claims 1 to 8, characterized in that: include: Real-time monitoring of the water inlet flow rate of the air chamber, the characteristic value of the air pressure change inside the air chamber, and the average air flow rate in several pipes; The power generation strategy of the power generation device is determined according to the water inlet flow rate, including determining whether to start the air pump according to the characteristic value of the air pressure change, or determining the operation mode of the pipeline according to the average air flow rate.

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