KR100335651B1 - Generation of electric power using tide kinetic emergy - Google Patents

Abstract

The present invention relates to a tidal power generator. In the conventional tidal power generators, a generator using the horizontal flow force of tides uses an axial flow turbine in which an axial line coincides with the tidal flow direction so that only the tidal speed and flow rate are used. Efficiency could not be expected. In addition, because the shaft of the axial turbine is installed in the direction parallel to the tidal flow direction, that is, in the horizontal direction, the bearing efficiency is lowered because the load of the turbine is concentrated on the lower half of the bearing supporting the shaft through the shaft. Mechanical loss (Mechanical Loss) is greatly generated, there is a problem that the power generation efficiency is lowered and eventually the power generation efficiency is lowered. The present invention is installed with a height difference between the tide inlet and the tide outlet, and by rapidly installing a turbine in which the impeller is horizontally rotated at a position lower than the tide inlet and higher than the tide outlet, it suddenly cuts the tide flowed horizontally vertically By rotating the turbine with the weighted water pressure to increase the power generation efficiency. In addition, it is possible to develop doubles regardless of ebb.

Description

Tidal power generation device {GENERATION OF ELECTRIC POWER USING TIDE KINETIC EMERGY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tidal power generation device, and more particularly, to a tidal power generation device which uses a gravity together with a tidal flow force to increase power generation efficiency.

The power generation devices currently used on earth include thermal power generation units, hydro power generation units and nuclear power generation units.

The thermal power plant uses fossil fuels. The damage to the environment is caused by not only the finiteness of fossil fuel-existing resources but also pollution, and the hydroelectric power plants must be submerged in large areas. There is a problem that causes damage, nuclear power plant has a problem with safety.

There is a device using tidal power as a pollution-free power generation device using nature.

Conventionally, as a power generator using tidal water, there are a power generation device using a difference between tides and a power generation device using a horizontal flow force of tides.

The generator using the difference between tides is a method of rotating fresh water in a dam at high tide, discharged at low tide, and using a free fall to rotate a turbine for a generator.

However, the tidal power generators require huge dams to be built on a wide range of coastal or coastal coasts, which not only entails huge facility costs but also cuts off some parts of the ocean from the ocean, thus destroying the ecosystem. However, there is a problem that many fish are killed in the course of passing through the turbine. In addition, the fresh water at high tide and discharged during the tide at low tide, the power generation is possible only at low tide, the power is not possible at high tide, there is a problem in terms of power generation efficiency. Therefore, the power generation device using the difference between tides is not widely spread.

The generator using the horizontal flow force of the tide is a method of rotating the turbine for the generator using the flow rate and pressure of the tidal current.

Since tidal flow rates and pressures vary from region to region, you should choose an area with optimal natural conditions. This type of power generation device exhibits high power generation efficiency at a faster place than at a slow flow rate. In addition, a generator using the horizontal flow force of the tidal stream generally uses an axial flow turbine (Axial Flow Turbine) in which the tidal flow is aligned with the tidal flow direction when the tidal flow direction is approximately horizontal. Inflow from one side of the outflow to the other side to generate power is currently the most widely used method.

In the power generation apparatus using the horizontal tidal force of the conventional tidal power, the desired power generation efficiency could not be expected because only the tidal velocity and flow rate are used among the tidal forces. In addition, since the impeller shaft of the axial turbine is installed in a direction parallel to the tidal flow direction, that is, in the horizontal direction, the bearing capacity of the axial turbine is concentrated on the lower half of the bearing supporting the impeller shaft through the impeller shaft. There is a problem that mechanical loss of energy (Mechanical Loss) is greatly generated to reduce the power generation efficiency and eventually the power generation efficiency.

Furthermore, in the conventional power generator using the tidal horizontal flow force, the impeller of the turbine rotates vertically about the horizontal axis. When the tidal horizontal flow force acts over the entire surface of the impeller, the impeller cannot be rotated. Therefore, in practical application, the tide's horizontal flow force only acts on half of the circle connecting the impeller, so that the tide's horizontal flow force is not used, and only partially, the power generation efficiency is further reduced. There was a problem.

An object of the present invention is to provide a tidal power generation apparatus that can perform more efficient power generation by using gravity as well as the tidal flow force.

Another object of the present invention is to provide an tidal power generation device that can greatly increase the power generation efficiency by enabling the rotation of the impeller even if the tidal action is applied over the front surface of the impeller.

Another object of the present invention is to provide a tidal power generation apparatus capable of generating power at high tide, as well as at low tide.

1 is a cross-sectional view showing a state of high tide of the tidal power generation apparatus according to the present invention.

2 is a cross-sectional view showing a state of low tide of the tidal power generation apparatus according to the present invention.

3 is a right side view of the tidal power generation apparatus according to the present invention.

** Description of symbols for the main parts of the drawing **

10 body 11 bottom plate

13a, 13b: tide inlet 14a, 14b: tide outlet

15: bulkhead 16: vertical plummet

21a, 21b, 22a, 22b: Directional sluice 23a, 23b: Inflow side emergency sluice

24,24b: Outflow sluice on the outflow side

30 turbine 31 impeller

32: impeller shaft 35,36: vortex throttle

40: generator

In order to achieve the object of the present invention, a bottom plate seated on the sea bottom is formed, and a tide inflow channel having a tide inlet is formed at both ends, and a tide inflow channel having a tide outlet at both ends is formed at the lower end thereof. A body of a vertical water trough is formed between the furnace and the tide runoff channel and has a machine room installed at an upper portion thereof; Opening and closing means having a water gate for selectively opening and closing the tidal inlet and the tidal outlet; A turbine having an impeller installed horizontally in the tide vertical plunger and having a horizontal rotation inside the housing; The generator is installed in the machine room is connected to the shaft of the impeller is driven rotationally; is provided an tidal power generating device characterized in that it comprises a.

Both sides of the body is characterized in that the bottom surface of the funnel-shaped tidal tide that is formed toward both sides from the tide inlet.

The shaft of the impeller is fixed to the lower portion of the machine room is characterized in that the lower end is supported by a bearing on the impeller shaft support tube extending to the impeller.

The impeller shaft support tube is characterized in that one or more vortex control plate having a smaller diameter than the impeller is installed.

The opening and closing means is characterized in that it consists of a direction change gate that can selectively open and close the tide inlet to the tide inlet and the tide outlet to the tide outlet.

The opening and closing means is characterized in that it further comprises an inlet side emergency gate for opening and closing the tide inlet of the tide inlet, and the outflow side outer gate for opening and closing the tide outlet of the tidal outlet.

Hereinafter, the tidal power generation apparatus according to the present invention will be described in detail according to the embodiment shown in the accompanying drawings.

1 and 2 show one embodiment of the tidal power generation apparatus according to the present invention. 1 is a state diagram of power generation at high tide, and FIG. 2 is a state diagram of power generation at low tide.

1 and 2, a body 10 having a channel through which the tidal water flows in and out, an opening and closing means for selectively opening and closing the channel, a turbine 30 installed in the channel and generating power by tidal force, It is composed of a generator (40) operated by the turbine (30).

The body 10 is a block body formed of concrete, and is formed to be towed by a tugboat, such as a barge, when transported to a sea area to be installed.

When fixing the tidal power generation apparatus according to the present invention on the bottom of the bottom plate 11 of the body 10, a plurality of fixing protrusions for being fixed to the bottom of the sea to ensure that the body 10 is stably fixed 12 is formed. That is, the fixing protrusion 12 is embedded in the sea bottom in fixing the body 10 to the sea bottom by using an anchor (not shown) and fastening and a connector (not shown), so that the body 10 is more stable. It is intended to be fixed.

The body 10 is formed to a height that the upper end portion can be located above the water level (High Tide) during high water.

The tide inflow channel 13 having the tide inlets 13a and 13b is formed at both ends of the body 10, and the tide outlet channel 14 having the tide outlets 14a and 14b at both sides at the lower end thereof. And a partition wall 15 is formed between the tide inflow channel 12 and the tide flow channel 13, and a substantially cylindrical tide vertical fall channel 16 is formed at the center of the partition wall 15. .

The tide inlet 13a and the tide outlet 14a are formed to face the deep sea, and the tide inlet 13b and the tide outlet 14b are formed to face the sea.

The top height of the tidal inflow channel 13 is designed to be lower than the low tide at low tide. This is to allow the tide to flow even during the low tide in the high tide.

The tidal outlet 14a, 14b is preferably formed to be inclined downward from the inside to the outside. This is for the smooth flow of the tide through the tide outlet 14a, 14b.

The tidal vertical plunging channel 16 forms a casing of the turbine 30, which will be described later. It is preferable that the inner diameter of the upper end portion is larger than that of the lower end portion as in a general turbine.

On both sides of the body 10, if the tide-shaped tide mole that opens toward both sides from the tide inlet 13 so as to drive the tide toward the tide inlet 13 to increase the pressure of the tide (17a, 17b, It is preferable to form 17c, 17d).

The upper part of the body 10 is provided with a machine room 18 in which a power transmission facility is installed together with a generator 40 to be described later.

The machine room 18 is provided with a manhole (not shown) through which a worker can enter and exit the machine to maintain and maintain mechanical equipment such as the generator 40.

The opening means is a sluice for opening and closing the tide inlet (13a, 13b) and the tide outlet (14a, 14b), the direction switching gate (21a) for selectively opening and closing the tide inlet (13a, 13b) and the tide outlet (14a, 14b) And 21b) 22a and 22b.

One or more of the redirection gates (21a, 21b) (22a, 22b) may be installed, respectively, but for safety.

In addition, the tide inlets 13a and 13b and the tide outlets 14a and 14b are closed to the tide inlets 13a and 13b and the tide outlets 14a and 14b when performing maintenance and maintenance operations. Inlet side emergency gates (23a, 23b) and the outlet side outer gates (24a, 24b) for blocking the is installed.

The diverting gates (21a, 21b) (22a, 22b) and the outflow side outflow gates (24a, 24b) is installed in a sliding type, the inlet side emergency outflow gates (23a, 23b) are installed in a swing.

The water gates 21a, 21b, 22a, 22b, 24a, and 24b are installed to be opened and closed by an opening and closing driving means used in a dam or a reservoir. For example, it consists of a hydraulic cylinder and a connecting mechanism connecting the piston rod and the gates (21a, 21b) (22a, 22b) (24a, 24b) of the hydraulic cylinder, or converts the motor and the rotational force of the motor into a linear motion It can be comprised by the electric mechanism which transmits a mechanism and the linear motion of this movement conversion mechanism to the hydrologic gate 21a, 21b (22a, 22b) 24a, 24b, and may use any kind of thing. Since the opening and closing means are conventional and do not correspond to the core technology of the present invention, detailed illustration and description thereof will be omitted.

The turning gates (21a, 21b) (22a, 22b) are the hydrological guide grooves (25a, 25b, 25c, 25d) formed on the inner surface of the tide inlet channel 13 and the tide channel 14 (26a, 26b) And 26c and 26d and guided through the hydrologic guide holes 27a and 27b and 27a and 27b formed in the partition wall 15, respectively, and the outflow side outer gates 24a and 24b are inner surfaces of the tidal outflow channel 14. The sluice guide grooves 28a and 28b formed in the sluice guide holes 29a and 29b formed in the partition wall 15 are guided.

The sluices 21a, 21b, 22a, 22b, 24a, and 24b may all be installed vertically, but the outflow side sluices 24a and 24a located on the outer side are parallel to the tide mall 17d. When the tide outlets 14a and 14b are closed by installing them, it is preferable to allow the outflow side outer gates 24a and 24b to serve as tidal malls.

The turbine 30 includes an impeller 31 installed to be horizontally rotatable inside the tide vertical water channel 16 formed in the central portion of the partition wall 15, the shaft 32 of the impeller 31, An axial turbine composed of an impeller support tube 33 supporting the impeller shaft 32 is used.

The upper end of the impeller shaft support tube 33 is fixed to the machine room 18 so as to support the impeller shaft 32 and the impeller 31. In addition, it is preferable to install a manhole (not shown) in the impeller shaft support tube 33 so that the impeller shaft 32 and the bearing 34 supporting the impeller shaft 32 can be repaired and maintained.

In addition, the impeller support tube 33 is preferably formed in such a shape that the diameter of the upper side and the diameter gradually decreases toward the lower side, which can reduce the resistance to the flow of the tidal flow consisting of the vertical drop in the horizontal flow. .

The flow rate of the tidal flow into the outer periphery of the impeller shaft support pipe 33 and flows into the tidal vertical plunging channel 16 into the outer periphery of the tidal inlet 13a and 13b is both near and far from the tidal inlet 13a and 13b. Vortex control plates 35 and 36 are installed to maintain uniformity. The diameter of the vortex control plate (35, 36) is formed smaller than the diameter of the impeller (31). The vortex control plates (35, 36) is preferably formed in a disk shape concentric with the tidal vertical plunging channel (16).

In addition, in the illustrated example, the two or more vortex control plates 35 and 36 are installed, but are not necessarily limited thereto, but may be installed only one or more.

The generator 40 is installed in the machine room 18 and is connected to the impeller shaft 32 so as to receive power.

An increaser (not shown) is provided between the shaft of the impeller 32 and the shaft of the generator 40 to increase the rotational force of the impeller 32 and transmit it to the generator 40.

Hereinafter, the operation of the tidal power generator according to the present invention will be described.

In the installation of the tidal power generation apparatus according to the present invention in the sea area after closing on the inlet side emergency outer gate (23a, 23b) and the outflow side outer gate (24a, 24b) after the tide inflow channel 13 and the tide outflow channel Float on the sea in the state to prevent the tide is introduced into the body 10 through the (14) and transported to the sea area to be towed to install using a tugboat. After transporting to the sea to be installed, the inlet side emergency gates (23a, 23b) and the outflow side gates (24a, 24b) are opened so that the seawater inlet (13a, 13b) and the tidal outlet (14a, 14b) The tide inflow channel 13 and the tide flow channel 14 and the tide vertical plunge channel 16 to be filled with sea water to sink to the bottom of the sea. The inlet side emergency outer gate (23a, 23b) is always kept open unless there is an emergency.

When the body 10 is seated on the sea bottom, it is fixed to the sea bottom by anchor means (not shown) as in a conventional sea structure. At this time, the body fixing part 11 installed on the bottom of the body 10 is stuck to the bottom of the sea to maintain a more stable posture.

In addition, in the installation of the tidal power generation apparatus according to the present invention, the tidal inlet 13a and the tidal outlet 14a face the deep sea, for example, and the tidal inlet 13b and the tidal outlet 14b face both sides. The line connecting the tide inlets 13a and 13b and both side tide outlets 14a and 14b is parallel to the tide flow direction.

As shown in FIG. 1, in the state of high water progress, the inflow-side outer gates 23a and 23b are kept open, and the direction switching gates 21a and 22a close the tidal outlet 14a and the tidal inlet 13a. ) Into the open state, the direction change gates 21b and 22b close the tide inlet 13b and keep the tide outlet 14b open, and the outflow side outer gate 24b is the tide outlet 14b. When kept in the open state, the tide is introduced into the tide inlet channel 13 through the tide inlet (13a).

At this time, since both sides of the body 10 are formed on the side of the tide inlet opening (13a) side to side of the tide-shaped tide mall (17a, 17b, 17c, 17d) is a tide of a wide range of tide ( It is collected by 17a, 17b, 17c, and 17d and flows into the tide inlet 13a to increase the flow rate and pressure of the tide.

The tide flowing into the tide inlet channel 13 through the tide inlet 13a flows horizontally, and since the opposite side tide inlet 13b is blocked by the turning gate 21b, it is in the direction toward the tide vertical plunge channel 16. In this case, since there is a head difference between the tide inflow channel 13 and the tide flow channel 14, the impeller 31 rotates while vertically plunges vertically through the tide vertical plunge channel 16.

At this time, the tidal force for rotating the impeller 31 is not limited to the tidal flow force, that is, the flow rate and the flow rate, so that the increased hydraulic pressure according to the water head difference between the tide inlet channel 13a and the impeller 31 is further joined. The rotation of the impeller 31 is made more smoothly.

That is, since there is a constant head difference between the tide inflow channel 13 and the installation position of the impeller 31, the tide flows in the tide inflow channel 13 and passes through the tide vertical plunge channel 16. During the process, the potential energy of the head is converted into kinetic energy, and the force is added as a force for rotating the impeller 31.

In addition, the tide flowed into the tide vertical plunging channel 16 immediately below the vortex control plates (35, 36) installed between the impeller 31 and the generator 40 of the tide introduced into the tide inflow channel (13). However, the tide introduced to the upper portion than the vortex control plate (35, 36) is not directly into the tide vertical plunging channel (17), but the position that is not close to the tidal inlet (13a) along the upper portion of the vortex control plate (35, 36) , And flows up to a position reaching the opposite side of the tide inlet 13a, and then flows into the tide vertical plunge channel 16, so that the tide of the tide vertical plunge channel 16 has a uniform flow rate of the tide in its entire cross section. 31) the rotation is made more smoothly.

The rotating force of the impeller 31 is transmitted to the generator 40 through the shaft of the impeller shaft 32, the speed increaser (not shown), and the generator 40 to generate power.

In fact, the inventors of the present invention have a prototype experiment in which an average head difference of 10 m is provided between the tide inflow channel 13 and the impeller 31. It was found that the rotational speed of the impeller 31 was increased by 30% or more as compared with the direction in which the impeller was rotated vertically.

In addition, the height from the upper surface of the body 10 to the top of the tide outlet 13a, 13b 6m, the diameter of the impeller 31 26m, the height of the tide vertical plunge channel 16 12m, the tide inlet 13 When the height from the bottom to the top of 10m and the height from the top of the tide inlet (13a, 13b) to the highest water level at high tide is 4m, it is estimated that 125MW can be generated even in consideration of fluid and mechanical losses.

On the other hand, in the process of the tide is discharged to the tide outlet 14b because the outlet 14b is formed inclined downward from the inside to the outside, the tide flows out smoothly to reduce the flow loss do.

At low tide, as shown in FIG. 2, the turning water gates 21b and 22b are closed to close the tidal outlet 14b, and the tidal inlet 13b is opened, and the turning water gates 21a and 22a are tidal. The inlet 13a is closed and the tide outlet 14a is opened, and the outlet side outer gate 24b is kept in the tide outlet 14b, and the outlet side outer gate 24a is the tide outlet. When the tank 14a is kept open, the tide is introduced into the tide inflow channel 13 through the tide inlet 13b.

At this time, since the opposite side tide inlet 13a is closed and the tide outlet 13b is open, the tide flowing into the tide inlet 13 through the tide inlet 13b flows in the horizontal direction, and the opposite side tide inlet 13b is Since it is blocked by the turning gate 21a, it turns to the side of the tide vertical fall channel 16, and at this time, there is a head difference between the tide inflow channel 13 and the tide flow channel 14, so the tide vertical fall. The impeller 31 is rotated while plummeting vertically through the channel 16.

The tide flows toward the tide vertical plunge channel 16, rotates the impeller 32 while passing through the impeller casing 31, and flows out through the tide outlet 22a.

When the tide is in the tide flow (17a, 17b, 17c, 17d) tide driven action by the tide, the power generation process and the power generation process by the flow of the tide is different only in the above-mentioned high tide and the flow direction of the tide Since the operation is the same, a detailed description thereof will be omitted.

As described above, the tidal power generation apparatus according to the present invention is installed with the tidal inlet and the tidal outlet at a height difference, and a tidal vertical plunge channel is formed between the tidal inlet channel and the tidal outlet channel, so that the impeller is horizontal in this tidal vertical plunge channel. By installing a rotating turbine, the tide flowing through the tide inlet channel and flowing in the horizontal direction is to rotate the turbine by the increased force as the tide falls sharply through the tide vertical plunge channel, thereby greatly increasing the power generation efficiency. In addition, the present invention is installed so that the impeller is horizontally rotated about the vertical axis and the assistant passes through the impeller from the top to the bottom, so even if the assistant acts over the front of the impeller, the impeller can be rotated to further increase power generation efficiency. Will be. In addition, the tidal inlet and the tidal outlet are formed on both sides, and the tide inlet and the tidal outlet are selectively opened and closed according to the direction of the tide, so that power is generated at high tide and at low tide, thereby increasing power generation.

Claims (6)

A bottom plate seated on the sea bottom is formed, and a tide inflow channel having a tide inlet on both sides is formed at the stop, and a tide flow channel having a tide outlet on both sides is formed at the bottom, and a tide vertical line between the tide inflow channel and the tide flow channel. A body having a plunging channel formed therein and a machine room installed thereon; Opening and closing means having a water gate for selectively opening and closing the tidal inlet and the tidal outlet; A turbine having an impeller installed horizontally in the tide vertical plunger and having a horizontal rotation inside the housing; And a generator installed in the machine room and connected to the shaft of the impeller and driven to rotate. The tidal power generation apparatus according to claim 1, wherein both sides of the body are provided with a bottom surface of a tide-shaped tide molar that opens toward both sides from the tide inlet. The tidal power generating apparatus according to claim 1, wherein the shaft of the impeller is supported by a bearing on an impeller shaft support tube which is fixed to the lower part of the machine room and extends so that the lower end thereof faces the impeller. The tidal power generator according to claim 1 or 3, wherein the impeller shaft support tube is provided with one or more vortex control plates having a diameter smaller than that of the impeller. The tidal power generation apparatus according to claim 1, wherein the opening and closing means comprises a turning gate to selectively open and close the tidal inlet to the tidal inlet and the tidal outlet to the tidal outlet. The tidal power generation apparatus according to claim 5, wherein the opening and closing means further comprises an inflow emergency emergency gate for opening and closing the tidal inlet of the tidal inlet, and an outflow outer gate for opening and closing the tidal outlet of the tidal outlet. .