Teaching materials for tidal power generation

Abstract

Provided is a teaching material for tidal power generation used in experiments of tidal power generation. 【Solution means】The teaching material for tidal power generation has a cylindrical housing 21 to which a tail-wing-shaped fixed wing 25 is attached on the outside, and a generator 23 attached to the inside of the cylindrical housing 21 via a support member 24. A turbine-shaped rotating blade 22 is inserted into the tip of a rotating shaft protruding from one end of the cylindrical housing of the generator 23. This teaching material for tidal power generation is placed in a water tank, an experiment of switching the water flow direction is carried out, the voltage of the power generated from the generator 23 is measured, and the follow-up characteristics of the teaching material for tidal power generation to the water flow are examined.

Description

Technical Field

[0001] The present invention relates to a teaching material for assisting children and students in understanding tidal power generation.

Background Art

[0002] Japan has declared that it will reduce greenhouse gas emissions to zero by 2050. In order to achieve this goal, the "Seventh Basic Energy Plan" was decided by the Cabinet in February 2025, aiming to reduce greenhouse gas emissions in 2040 by 73% compared to 2013.

[0003] In this basic plan, as the "direction of policies towards 2040", it is stated that "it is necessary to pursue all options under the policy of making full use of all available technologies", and also that in promoting such energy policies, it is necessary to deepen the understanding of energy among all levels of the public, and in the field of school education, it is important to provide opportunities for learning basic knowledge about energy.

[0004] In Japan, which is surrounded by the sea, it is required to effectively utilize marine energy in promoting energy policies. In systems that utilize the kinetic energy of seawater for power generation, "ocean current power generation" and "tidal power generation" are known. Ocean current power generation is a method of generating electricity by rotating a power generation turbine with ocean currents generated by the wind blowing on the sea surface and the rotation of the earth. Patent Document 1 below describes an example of ocean current power generation.

[0005] On the other hand, tidal power generation uses the ebb and flow of tides generated by the gravitational forces of the moon and the sun to rotate a power generation turbine. High tide and low tide occur alternately twice a day, and the movement of seawater accompanying them is regular. Therefore, tides can be predicted regardless of weather, season, or day and night, and tidal power generation has attracted attention as a means of stably generating renewable energy.

Prior Art Documents

Patent Document

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] The purpose of the present invention is to provide a learning material that can assist in understanding tidal power generation in an educational setting.

Means for Solving the Problems

[0008] The present invention is a teaching material for tidal power generation that is installed and used in a water tank capable of changing the direction of water flow in the forward and reverse directions, and includes a cylindrical housing, a rotor that rotates within the cylindrical housing, a rotation shaft of the rotor that protrudes from one end of the cylindrical housing, a generator having the rotation shaft, a turbine - shaped rotating blade inserted into a portion of the rotation shaft that protrudes from one end of the cylindrical housing, and a tail - wing - shaped fixed wing attached to the cylindrical housing via a coupling member. The tail - wing - shaped fixed wing attached to the coupling member is located behind the other end of the cylindrical housing, and various - shaped tail - wing - shaped fixed wings are configured to be attachable to the coupling member.

[0009] Through experiments using this teaching material, children and students can recognize that in tidal power generation, it is necessary to make the generator follow the change in the direction of water flow, and also understand that the ability to follow the water flow direction varies depending on the shape of the coupling member and fixed wing coupled to the generator, etc.

[0010] In addition, in the teaching material for tidal current power generation of the present invention, the coupling member is formed by a cylindrical housing in which the generator and the turbine-shaped rotating blades are arranged inside, and the generator is fixed inside the cylindrical housing via a support member. Further, the tail fin-shaped fixed wing is provided with an extension portion for attaching to the outer periphery of the cylindrical housing, and a protrusion formed on the extension portion is inserted into a hole portion provided on the outer periphery of the cylindrical housing to position the tail fin-shaped fixed wing at a position behind the cylindrical housing.

[0011] In addition, in another embodiment of the teaching material for tidal current power generation of the present invention, the coupling member is formed by a plurality of rod-shaped bodies extending from the other end of the cylindrical housing of the generator in a direction opposite to the protruding direction of the rotating shaft. And the tail fin-shaped fixed wing is attached to the tips of the plurality of rod-shaped bodies via a fixing member having a fixing hole into which the tip of the rod-shaped body is inserted.

Advantages of the Invention

[0012] Through the teaching material for tidal current power generation of the present invention, children and students can deepen their understanding of tidal current power generation.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

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Figure 7

Modes for Carrying Out the Invention

[0014] As shown in FIG. 1, the tidal power generation experiment is carried out by submerging the teaching material 20 for tidal power generation in a water tank 10 storing water. In the water tank 10, a water flow pump 11 that generates a water flow is arranged, and a water flow simulating high tide and low tide is generated by switching the direction of the water ejected from the water flow pump 11 every predetermined time.

[0015] As shown in FIGS. 2 and 3, the teaching material for tidal power generation according to the first embodiment has a cylindrical housing 21 to which a tail fin-shaped fixed wing 25 is attached outside, and a generator 23 attached to the inside of the cylindrical housing 21 via a support member 24. In this teaching material for tidal power generation, the role of the coupling member for attaching the tail fin-shaped fixed wing 25 to the generator 23 is played by the cylindrical housing 21 surrounding the generator 23.

[0016] The generator 23 has a rotor that rotates inside the cylindrical housing and a rotating shaft of the rotor. This rotating shaft is pivotally supported by the cylindrical housing of the generator 23. Further, this rotating shaft protrudes from one end of the cylindrical housing of the generator 23, and a turbine-shaped rotating blade 22 is inserted into the tip of this protruding rotating shaft.

[0017] A tail fin-shaped fixed wing 25 is attached to the outer periphery of the cylindrical housing 21 surrounding the generator 23. As shown in FIG. 4, an extension portion 26 for attaching to the outer periphery of the cylindrical housing 21 is provided on the tail fin-shaped fixed wing 25, and a protrusion 27 for inserting into a mounting hole 28 formed on the outer periphery of the cylindrical housing 21 is provided on this extension portion 26. When the protrusion 27 of the extension portion 26 is inserted into the mounting hole 28 of the cylindrical housing 21 to fix the extension portion 26 to the cylindrical housing 21, the tail fin-shaped fixed wing 25 is positioned at a position behind the rear end of the cylindrical housing 21.

[0018] As shown in FIGS. 2 and 3, this teaching material 20 for tidal power generation is arranged in the water tank 10 via a support mechanism 30 that supports the cylindrical housing 21. The vertical axis included in the support mechanism 30 supports the cylindrical housing 21 so as to be rotatable around the axis.

[0019] The teaching material 20 for tidal current power generation disposed in the water tank 10 changes the orientation of the cylindrical housing 21 so that the tail fin-shaped fixed wing 25 is located on the downstream side of the water flow. The water that enters the cylindrical housing 21 from the side of the turbine-shaped rotating wing 22 of the cylindrical housing 21 rotates the turbine-shaped rotating wing 22, and accordingly, the rotating shaft of the generator 23 rotates to generate electricity. The voltage of the generated power can be detected through a generated voltage measurement system including a wireless module for voltage measurement and a receiving unit, etc.

[0020] As shown in FIG. 4, a number of tail fin-shaped fixed wings 25 with different shapes and lengths of the extension part 26 are prepared. By attaching various tail fin-shaped fixed wings 25 to the cylindrical housing 21, conducting an experiment to switch the water flow direction in the water tank 10, and measuring the voltage of the power generated from the generator 23 at that time, the characteristics (tracking characteristics to the water flow) of the teaching material 20 for tidal current power generation whose orientation is changed in the water flow direction can be investigated, and the shape of the tail fin-shaped fixed wing 25 having high tracking characteristics to the water flow suitable for tidal current power generation can be known.

[0021] As shown in FIGS. 5 and 6, in the teaching material 40 for tidal current power generation of the second embodiment, a turbine-shaped rotating wing 42 is inserted into the rotating shaft of the rotor protruding from one end of the cylindrical housing of the generator 43, and a tail fin-shaped fixed wing 45 is attached to the tip of a plurality of rod-shaped bodies 44 extending from the other end of the generator 43. In this teaching material 40 for tidal current power generation, the role of the coupling member for attaching the tail fin-shaped fixed wing to the generator is played by a plurality of rod-shaped bodies 44 extending from the generator 43.

[0022] As shown in FIG. 7, the tail fin-shaped fixed wing 45 attached to the rod-shaped body 44 extending from the generator 43 is integrated with a conical fixing member 47 in which fixing holes 46 for inserting the tips of the plurality of rod-shaped bodies 44 are formed.

[0023] A plurality of tail fin-shaped fixed wings 45 are arranged at positions symmetric with respect to the central axis of the conical fixing member 47. When a plurality of rod-shaped bodies 44 extending from the generator 43 are inserted into the fixing holes 46 of the fixing member 47, as shown in FIGS. 5 and 6, the plurality of tail fin-shaped fixed wings 45 are fixed at positions symmetric with respect to the central axis of the generator 43 at a position behind the generator 43.

[0024] The teaching material 40 for tidal current power generation of the second embodiment is arranged in the water tank 10 via the support mechanism 31 in the same manner as the teaching material 20 for tidal current power generation of the first embodiment. The support mechanism 31 supports the generator 43 so that it can rotate around a vertical axis.

[0025] The teaching material 40 for tidal current power generation arranged in the water tank 10 changes the orientation of the generator 43 so that the tail fin-shaped fixed wing 45 is located on the downstream side of the water flow. The turbine-shaped rotating blade 42 located on the upstream side of the water flow receives the water flow and rotates. Accordingly, the rotating shaft of the generator 43 rotates to generate electricity. The voltage of the generated electricity is detected through a generated voltage measurement system including a voltage measurement wireless module and a receiving unit.

[0026] When the teaching materials 20 and 40 for tidal current power generation are actually arranged in the water tank 10 to conduct an experiment on tidal current power generation, it is found that the teaching material 40 for tidal current power generation of the second embodiment has higher follow-up characteristics with respect to the water flow than the teaching material 20 for tidal current power generation of the first embodiment, and it is possible to increase the shape of the turbine and increase the power generation amount. By having children and students think about the causes affecting such tidal current power generation, the understanding of children and students regarding tidal current power generation will deepen, and it is expected that the number of children and students who explore mechanisms suitable for tidal current power generation will increase.

Industrial Applicability

[0027] The teaching material for tidal current power generation of the present invention can deepen the understanding of children and students regarding tidal current power generation.

Explanation of Reference Numerals

[0028] 10 Water tank 11 Water flow pump Teaching materials for tidal power generation 21 Cylindrical housing 22 Turbine-shaped rotating blades 23 Generator 24 Support member 25 Fin-shaped fixed wing 26 Extension part 27 Protrusion 28 Mounting hole 30 Support mechanism 31 Support mechanism 40 Teaching materials for tidal power generation 42 Turbine-shaped rotating blades 43 Generator 44 Rod-shaped body 45 Fin-shaped fixed wing 46 Fixing hole 47 Fixing member

Claims

1. A teaching material for tidal power generation that is placed in a water tank that can change the direction of the water flow in a forward and reverse direction, A generator having a cylindrical housing and a rotor that rotates within the cylindrical housing, the rotor's rotation shaft protruding from one end of the cylindrical housing; a turbine-shaped rotor inserted into a portion of the rotary shaft protruding from one end of the cylindrical casing; A coupling member coupled to the cylindrical housing; a tail-like fixed wing attached to the connecting member so as to be located rearward of the other end of the cylindrical casing; Equipped with The tail-like fixed wing of various shapes can be attached to the connecting member. This is a teaching material for tidal power generation.

2. The tidal power generation teaching material according to claim 1, the coupling member includes a cylindrical housing in which the generator and the turbine-like rotor are disposed, the generator is fixed in the cylindrical housing via a support member, The tail-like fixed wing is provided with an extension portion for attachment to an outer periphery of the cylindrical housing, a projection formed on the extension portion is inserted into a hole in an outer periphery of the cylindrical housing, whereby the tail-like fixed wing is positioned behind the cylindrical housing; This is a teaching material for tidal power generation.

3. The tidal power generation teaching material according to claim 1, the coupling member is made of a plurality of rod-shaped bodies extending from the other end of the cylindrical housing of the generator in a direction opposite to a protruding direction of the rotating shaft, the tail-like fixed wing is attached to the rod-shaped bodies via a fixing member having fixing holes into which the tips of the rod-shaped bodies are inserted; This is a teaching material for tidal power generation.

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