TWI494504B - Array kinetic energy capture device - Google Patents

Description

Array type kinetic energy extraction device

The invention relates to a kinetic energy extractor, in particular to an array type kinetic energy extracting device which generates kinetic energy by turbulence.

In response to climate change and environmental protection in the world, renewable energy is characterized by clean, low greenhouse gas emissions and self-produced energy. More and more countries regard renewable energy as one of the priorities of future energy policies. The energy policy is also gradually thinking about how to develop renewable energy.

Traditional small wind turbines require large space to operate due to the use of windmill blades. They must be kept away from densely populated areas and can generate electricity when the wind speed reaches 4 meters per second. The wind speed can be increased to 7 meters per second. Effective power generation. However, the average wind speed in most cities around the world is only 5 meters per second. In the case of wind speed limitation, traditional small wind turbines can only operate 20%-40% of the time.

In order to improve the aforementioned deficiency, the applicant of the present application has previously filed the case of No. 97146198, mainly to provide an energy extractor that can generate electricity by itself only in the environment of fluid flow, thereby not only renewable energy, but also It can meet the environmental protection needs of energy saving. However, the inventor of this case did not satisfy this, but still adhered to the spirit of excellence, with the goal of improving power generation efficiency, and actively engaged in research and development.

Accordingly, it is an object of the present invention to provide an array type kinetic energy extraction device that can improve vibration energy and power generation benefits.

Thus, the array type kinetic energy extraction device of the present invention comprises a substrate and a plurality of piezoelectric elements. The substrate has a plurality of flow channels arranged in an array, each flow path having an inlet and an outlet for fluid to enter and exit, respectively. The piezoelectric elements are respectively disposed in the substrate with respect to the flow channel, and converge to the flowing fluid to convert the kinetic energy into electrical energy.

The function of the invention is to utilize the arrangement of the arrays, accelerate the fluid flow rate in each flow channel, and increase the output electrical energy, thereby achieving the purpose of improving vibration energy and power generation efficiency.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Referring to Figures 1, 2, and 3, a preferred embodiment of the arrayed kinetic energy extraction device of the present invention comprises a substrate 2, a number of piezoelectric elements 4, and a number of spoilers 5.

The base 2 has a plurality of walls 21 partitioned into a plurality of flow passages 20, a confluence opening 22 formed at one end of the walls 21, and a necked portion 23. The flow channels 20 are arranged in an array (the preferred embodiment is a 3×3 array), and each has an inlet 201 and an outlet 202 formed at two ends and communicating with the outside. A wall 211 adjacent to each flow path 20 is formed with a recess 211, respectively. The area of the manifold 22 covers all of the inlets 201 and is used to direct fluid flow to the inlets 201. The necking section 23 is formed between the inlet port 22 and the inlets 201, and the sectional area is gradually reduced from the end adjacent to the inlet port 22 toward the other end adjacent to the inlets 201.

The piezoelectric elements 4 are respectively enclosed in the recesses 211 of the wall 21 with respect to the flow path 20, and converge to the flowing fluid to convert the kinetic energy into electrical energy. It is to be noted that the concave portions 211 formed between the adjacent flow paths 20 can accommodate the piezoelectric elements 4 up and down, respectively.

The piezoelectric element 4 is made of piezoelectric material (Piezoelectric Materials), and is a material that converts electrical energy and mechanical energy. Since the crystal arrangement of the piezoelectric material has directionality, when an external force is applied along a certain direction, the crystal At the same time of deformation, the electric coupling pole moments will be rearranged, causing a charge on the surface of the medium, which will generate a voltage.

The spoilers 5 are respectively disposed in the horizontal direction of the flow path 20 of the base body 2 and have a slope 51 facing the piezoelectric element 4, respectively. The slope 51 is inclined from an end adjacent to the inlet 201 toward the other end adjacent to the outlet 202.

According to the foregoing, when the fluid converges on the manifold 22 of the substrate 1 and the inlets 201 and the outlets 202 enter and exit the channels 20 arranged in an array, the fluid is blocked from being located below the piezoelectric element 4. The spoiler 5 generates a large fluctuation and turbulence, whereby the piezoelectric element 4 that greets the fluid generates a large vibration accompanying the fluctuation of the fluid, thereby converting the kinetic energy into electrical energy to achieve the power generation effect. .

It is worth mentioning that according to the law of conservation of mass: A ₁ V ₁ = A ₂ V ₂

A ₁ : cross-sectional area of the manifold 22

V ₁ : flow rate of the fluid in the manifold 22

A ₂ : cross-sectional area of the flow path 20

V ₂ : flow rate of the fluid in the flow channel 20

It is assumed that the flow rate of the fluid entering the outlet port 22 is 2 m/s to 4 m/s. When the fluid passes through the necking section 23, the fluid will have a compression effect on the fluid due to the reduction of the section. The flow rate is increased, whereby the cross-sectional area of the manifold 22 is approximately 9 times larger than the cross-sectional area of each channel 20, and according to the above formula A ₁ V ₁ = A ₂ V ₂ , 9V ₁ =1 V ₂ can be calculated. By V ₂ =9*2~9*4, it is known that the flow rate into each flow channel 20 is greatly increased to 18 m/s to 36 m/s. Obviously, the present invention can greatly increase the flow rate, far exceeding the standard of 7 meters per second required for power generation in the prior art.

According to the above description, the array type kinetic energy extraction device of the present invention has the following advantages and effects:

The present invention can utilize the arrangement of arrays and the special effects of compressing fluids to accelerate the flow velocity of fluids in each flow channel 20, and boost the generated electrical energy by a plurality of piezoelectric elements 4, not only at a flow rate of 2 meters per second. In this case, a standard far exceeding the required flow rate of 7 meters per second in power generation in the prior art is generated, which meets the environmental protection requirements of renewable energy, energy saving, and can pass the spoiler 5 through the spoiler 5 After the formation of significant fluctuations in fluid pressure, thereby achieving the purpose of improving vibration energy and power generation efficiency, the invention is more competitive in products.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

2‧‧‧ base

20‧‧‧ flow path

201‧‧‧ entrance

202‧‧‧Export

21‧‧‧ wall

211‧‧‧ recess

22‧‧‧Confluence

23‧‧‧Neck section

4‧‧‧Piezoelectric components

5‧‧‧ spoiler

51‧‧‧Bevel

1 is a perspective view showing an array type kinetic energy extracting device of the present invention A preferred embodiment of the present invention; FIG. 2 is a cross-sectional view of the preferred embodiment; and FIG. 3 is another cross-sectional view of the preferred embodiment.

2‧‧‧ base

20‧‧‧ flow path

201‧‧‧ entrance

202‧‧‧Export

21‧‧‧ wall

211‧‧‧ recess

22‧‧‧Confluence

23‧‧‧Neck section

4‧‧‧Piezoelectric components

5‧‧‧ spoiler

51‧‧‧Bevel

Claims (10)

An array type kinetic energy extraction device comprises: a substrate having a plurality of flow channels arranged in an array, each flow channel respectively having an inlet and an outlet for fluid to enter and exit; and a plurality of piezoelectric elements respectively opposite to the flow The channel is disposed within the substrate and traverses the flowing fluid to convert the kinetic energy into electrical energy. The array type kinetic energy extracting device according to claim 1, wherein the base body has a plurality of walls partitioned into the flow paths. The array type kinetic energy extracting device according to claim 2, wherein the piezoelectric element is disposed on at least one wall adjacent to each of the flow paths. The array type kinetic energy extraction device according to claim 2, wherein at least one wall adjacent to each flow path is formed with a recess for accommodating the piezoelectric element. The array type kinetic energy extraction device according to claim 4, wherein the concave portions formed between the adjacent flow paths respectively accommodate the two piezoelectric elements up and down. The array type kinetic energy extraction device according to claim 1, further comprising a plurality of spoiler members respectively disposed in the flow channel, so that fluid entering the flow channel passes through the spoiler Fluctuations in fluid pressure are formed. The array type kinetic energy extraction device of claim 6, wherein each of the spoilers has a slope facing the piezoelectric element, the slope being from an end adjacent to the inlet toward the other end adjacent to the outlet pour oblique. The array type kinetic energy extraction device of claim 6, wherein each of the spoilers is opposed to the piezoelectric element. The array type kinetic energy extraction device according to claim 1, wherein the base body further has a junction port formed at one end and covering all the inlets, the outlet port for guiding the fluid flow to the inlets. The array type kinetic energy extraction device according to claim 9, wherein the base body further has a gap formed between the inlet port and the inlets and a sectional area from one end adjacent to the outlet port toward the other of the inlets A necked section that tapers at one end.