JP2016160928A - Tidal power generation panel and mooring rope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To resolve some problems found in the prior art tidal power generation that a guidance for the most-preferable design attained in view of the optimal unit machine capacity has not been established and additionally a preferable installation method when several power generation units are utilized has not been proposed.SOLUTION: A tidal power generation panel of this invention increases a drag coefficient by congesting many hydraulic power generation units with low output of several tens kW class and loading them like a flat-plate manner, makes a pressure difference across a partial bank in tidal flow and can make a power generation output per unit tidal current area under the pressure difference to twice or larger than that of a hydraulic power turbine generator with several thousand kW class in a usual open tidal flow. In addition, this tidal current power generation panel itself can be connected with the mooring cable from the sea bottom foundation and this can be applied as a tidal power generation type foundation composing element of which an application range is wide such as a mooring type tidal power generating ship or a mooring type tide power generating ship or a mooring type marine supporting tidal power generation facility of which legs are fixed to a sea bottom.SELECTED DRAWING: Figure 1

Description

The present invention relates to a tidal current power generation facility that converts kinetic energy of a fluid of a tidal current such as the Kuroshio into rotational energy by a hydro turbine or the like and converts it into electric energy by a generator.

Tidal current power generation and wind power generation have a common point by converting fluid kinetic energy into electrical energy. Wind power generation is used in land and in shallow water, and it is already in the late stage of growth when applied to the product life cycle, and a power generation nacelle with a huge windmill on a long cylindrical column is installed so as to be able to swivel. Is converging on global standards.

Tidal current power generation is a theme that attracts attention as a natural energy after wind power generation. For example, the Kuroshio Current is a surface current that has a strong current zone that extends from the sea surface to a depth of about 200 m and has a width of 100 km, the direction of the flow is stable for a long period of time, and the flow speed varies daily and seasonally. Is also known to be relatively few. Unlike solar power generation that can generate electricity only on sunny days and whimsical wind power generation, the total power generation efficiency (total facility utilization rate) is close to 100%, making it a highly reliable and stable energy source that Japan needs It is pointed out that it can bear a considerable part of energy.

However, compared to other renewable energy power generation methods that can be installed, inspected and repaired on the ground, tidal current power generation that must be carried out in the sea has been refrained from trying to put it to practical use because of the difficulty of the work. . For this reason, when applied to the product life cycle, it is still in the early stage of introduction, and several methods are finally entering the verification test. It has not yet been seen what system will become the global standard in the future.

Japanese Patent No. 5656155 Multi-hull type tidal current power generation facility Japanese Patent No. 5622013 Collective tidal power generation facility

Report on Joint Research “Research on Ocean Current Power Generation” Marine Science and Technology Center Tokyo Electric Power Company September 1981 Renewable Energy White Paper Second Edition Chapter 6 Ocean Energy New Energy and Industrial Technology Development Organization December 2013

The mainstream of tidal current power generation demonstrations that are currently being announced is heading toward a larger single-machine output. On the other hand, “Patent Document 1” and “Patent Document 2” have a larger single-machine output when a large number of power generation units having a small single-machine output are collectively used for the target tidal cross-sectional area that produces the same energy. He stressed that the L-square cube law should be used, which requires less material than using a small number of power generation units. Specifically, while many of the single tester's output is 1000kW class, it is of several tens of kW class that can be mass-produced by existing technology and existing equipment such as the transportation machinery industry that can be used in the current developed countries. He argued that there was a future in the design philosophy of densely loading a large number of power generation units with a small unit output in a grid.

In addition, “Patent Document 1” is configured so that all installation work and inspection / repair work can be performed in the air in “Patent Document 2”, which is a major reason why tidal power generation is avoided. Work under the sea is almost unnecessary, and the hurdle to practical use is further lowered.

“Patent Document 1” and “Patent Document 2” solve most of the technical difficulties in the construction and operation of tidal current power generation. However, regarding the method of installing the power generation panel, only a part of the possibilities are presented, and the technical system is incomplete. For example, “Patent Document 1” shows only a method of fixing a power generation panel and a hull of a multihull ship and mooring a mooring line originating from a submarine foundation at a mooring point of the hull.
It is an object of the present invention to construct as many tidal current power generation technical systems as possible by disclosing as many geometric structures that can be put into practical use that were not found in "Patent Document 1" and "Patent Document 2".

In “Patent Document 1”, mooring lines are moored to the two hulls on the left and right wings of a multihull ship in order to target a high-output power plant that suspends and fixes as many power generation panels as possible under the floating body. The geometric configuration for providing points is shown. If it is limited to the case where one power generation panel is suspended and fixed to the catamaran so as to be rotatable, different geometric configurations are possible. In this method, one mooring point is provided on each of the left and right sides of the power generation panel to which drag is applied during power generation. Providing this mooring point in a frame structure on a horizontal line passing through the point of action of the power generation drag is the first means for solving the problem.

Two mooring lines, one each from the above two mooring points, are collected at the mooring relay point at an equal distance in the range of 2 to 20 times the width of the mooring point. Connect the base side mooring line extended from the seabed mooring foundation to the point. Here, an isosceles triangle with the width of the tidal power generation panel as the bottom and a longer oblique side is formed. The apex is called the mooring relay point, which is based on the mooring line that carries from the submarine mooring foundation to the mooring relay point. This is called a side mooring line. This geometrical configuration is similar to the relationship between the kite and the kite string, and by using this configuration, the kite can maintain a stable posture against the wind. The multiple of the length of the hypotenuse with respect to the base is considered to be about 3 to 7 times according to the empirical value of the eyelid, but the posture stabilizing action can be expected before and after that.

There can be a plurality of variations in the first means. The above-mentioned first means that when a tidal power generation panel is imitated as a kite, it looks like a kite flying with two kites, but in reality the hull that suspends and fixes the panel vertically The force for maintaining is applied, and has the same effect as a kite whose posture is controlled by three or more kites. Therefore, tidal power generation panels do not require more than two mooring lines on the left and right for posture stabilization.

However, the tidal current power generation panel generates various turbulences including Karman vortex by interaction with the tidal current, and yawing force is applied to the hull as a reaction. If a mooring point is provided at a position below the action point of power generation drag due to the positional relationship from the sea surface, the tidal current power generation panel generates a rotational force that lifts the bow to the mooring point and sinks the stern. If a mooring point is provided at the front of the hull so as to counteract this rotational force, and the third and fourth auxiliary mooring lines are provided between the mooring relay points, the action of suppressing the yawing force of the hull will work. . This geometric configuration is the second means for solving the problem.

There is a buoyancy center in the approximate center of the hull. The Kuroshio strong current zone is about 200m below the sea level, so the vertical length of the tidal current power generation panel is often about 200m. In order to suspend and fix the tidal power generation panel at the center of the hull length, the hull length exceeds 400 m. I think this is a bit too long. It would be advantageous if the length of the hull could be shortened and suspended and fixed from a position close to the bow. If a suspension point is provided at such a position, there is a suspension / fixation point ahead of the center of buoyancy. In order to join, the hull is in a forward-facing position. On the other hand, when the mooring point is lowered below the center of drag, a rotational force that lowers the stern about the mooring point acts. If a mooring point is provided at a position that balances these two forces, the hull is kept horizontal even when a power generation load is applied. This geometric configuration is the third means to solve the problem.

The power generation unit loaded on the tidal power generation panel is designed to respond to the tidal current flowing in from the front. Yes. It is geometrically possible to provide a tidal power generation panel with a bottom mooring foundation and mooring lines symmetrically. Such a mooring type tidal power generation vessel can also operate against a tidal current whose direction of ocean current is reversed four times a day depending on the time of day. This geometric configuration is the fourth means for solving the problem.

“Patent Document 1” is a moored tidal power generation ship and “Patent Document 2” is an underwater-supported tidal power generation facility, but a tidal power generation panel is an element common to both. For this reason, claim 1 of the present invention is described and configured to cover both the mooring type and the underwater support type. However, the main pillar structure of the subsea-supported tidal current power generation facility described in “Patent Document 2” stands upright on its own, and has a mechanical strength that can resist the power generation drag and the drag exceeding it, but is semi-permanent. Since it is a huge structure, it is inevitable that the initial cost becomes extremely high. Speaking of the type of bridge, it corresponds to a girder bridge made of abundant materials and made rigid.

Legs that reach the sea floor are added to the tidal current power generation panel, the offshore facilities support the offshore facilities, and most of the drag is borne by the submarine mooring foundation and mooring line. If it is a geometrical structure that mainly bears the vertical component, the amount of materials used is very small, and the initial cost is probably only a fraction of that of the subsea support type mentioned in the previous section. If a tidal current power generation panel with this structure needs to be repaired or remodeled on a large scale due to long-term use, the connection between the leg and the bottom of the bottom seabed will be released, and the mooring line will be lifted off the bottom of the bottom, The work can be towed to the dock on land by the work ship, and the necessary work can be easily performed at the dock. Speaking of the type of bridge, it corresponds to a cable-stayed bridge with a flexible structure. This geometric configuration is a fifth means for solving the problem.

Finally, there is a physical limit that the power generation drag generated by the power generation unit described above cannot exceed the drag generated when the tidal power generation panel exists in the tidal current. The drag of a tidal power generation panel is the product of three variables: “area”, “drag coefficient”, and “square of flow velocity”. The drag coefficient of the flat plate is about 1.1. However, if the shape is such that the tide that pushes the edge of the flat plate forward and does not escape from the edge of the flat plate, the drag coefficient is slightly about 1.3. growing. When the drag is increased by such a geometric shape, the output obtained from the same tidal current area increases in proportion to the drag. As a result, if the output obtained from the same tidal area is 1, the value of a power generator unit having a tidal power generation panel structure is more than twice as large as that of a turbine generator installed in an open tidal current. This is a major feature of the tidal current power generation panel method. Such a geometric configuration is the sixth means for solving the problem.

In the world of biological evolution, there was an event called the Cambrian explosion. Tidal power generation is also at that time. There are 6 types of geometric configurations related to the tidal current power generation panel disclosed in the present invention, and there are about 9 types of geometric configurations of “Patent Document 1” and “Patent Document 2”. Some of them are functionally duplicated, but what kind of geometric configuration (body plan) will ultimately survive will be determined by future technical verification and knowledge gained from demonstration tests. Would.

The present invention does not arrange a small number of large turbine generators in tidal power generation, but a system in which a large number of small turbine generators are integrated in a tidal power generation panel is excellent in terms of performance and has economic rationality, Shows that it can play a part in the realization of a hydrogenated society, with 4 geometry for moored tidal power ships equipped with such power generation panels, 1 geometry for moored underwater tidal power generation facilities, and 1 geometry for tidal current power generation panel bodies. The general structure was disclosed. In putting tidal power generation into practical use by adopting tidal power generation panel method, by selecting a plan suitable for a given condition from these, the degree of freedom of development increases, and practical application with the right direction can be realized sooner. effective.

It is a front view of a mooring type tidal power generation ship. Example 1 It is a side view of a mooring type tidal current power generation ship. Example 1 It is a side view of a mooring type tidal power generation ship having three or more mooring lines. (Example 2) It is a side view of the mooring type tidal current power generation ship which suspends a power generation panel ahead from the buoyancy center. (Example 3) It is a side view of a tidal current mooring type tidal power generation ship. Example 4 It is a front view of an underwater tidal current power generation facility using a mooring line. (Example 5) It is a side view of an underwater support tidal power generation facility using a mooring line and a self-supporting underwater support tidal power generation facility. (Example 5) It is a partial horizontal plane sectional view of a tidal current power generation panel provided with a high drag-proofing projection. (Example 6)

FIG. 1 is a front view of a catamaran tidal power generation ship according to the present invention as seen from the bow side, and FIG. 2 is a side view thereof. The contents of the multihull type tidal power generation facility in “Patent Document 1” are almost the same as the drawings, but in “Patent Document 1” mooring points of two mooring lines are provided on the side of the hull, but in FIG. The point 7 is provided on a horizontal line passing through the center of action of the power generation drag of the frame structure of the tidal power generation panel 8. In both figures, the two mooring lines 6 on the ship side gather to the mooring relay point 5 and connect to the mooring line 4 on the foundation side, and the submarine foundation 3 buried in the bedrock of the seabed 2 is a huge The situation of receiving a strong tension was shown. This geometrical configuration corresponds to “Claim 1” of “Claims”.

In the operation mode, the tidal current power generation panel 8 is suspended and fixed by the rotating shaft structure 12 from the upper structure 11 corresponding to the deck of the hull 10 of the catamaran. FIG. 2 shows that the tidal current power generation panel 8 in the operation mode and the rotating shaft structure 12 provided in the upper structure 11 are rotated 90 degrees clockwise so that the inside of the ship (between the two hulls of the catamaran and the upper structure). The tidal current power generation panel 9 stored in the ocean space surrounded by the body is shown at the same time. In the storage mode, all maintenance work such as replacement of the power generation unit related to the tidal current power generation panel can be performed in the sea where the work is safe and easy, not in the sea where the work is difficult. This is a great merit of the moored tidal power generation ship according to the present invention.

Suppose that the tidal power generation panel in Fig. 1 is facing the tidal current of 2 m / s. This geometrical configuration creates a partial weir that partially dams the tidal current and forcibly creates a pressure difference (water head). As mentioned in the sixth means, when the drag coefficient of this tidal power generation panel is 1.3, a drag force of 277 kg is produced per 1 m 2, which corresponds to a head of about 27 cm. This water head is a power generation unit, and the conversion diversion nozzle effect (the turbine drive area is small relative to the panel area, which causes the water flow to be throttled) causes the water flow to be accelerated per tidal current facing area of the tidal power generation panel An electric output of about 5 kW is generated, and a drag that balances the aforementioned drag is generated. At this flow rate, the power output per square meter of a general hydro turbine is about 2 kW, so that the power output per unit area of the tidal power generation panel system is considerably larger than twice.

To imagine the scale of a tidal power generation panel, let's take an example of a moored tidal power generation ship with a length of 200m, a width of 150m, and a tidal current facing area of 30,000m2. This tidal power generation panel generates an output of about 150,000 kW and a total drag of the tidal power generation panel of about 9,000 tons when the tidal current is 2 m / s. Let's say that it was 12,000 tons, including the hull drag. When the angle of the mooring line with respect to the sea level is 30 degrees, the tension of the mooring line is 13,856 tons and the force that the tidal power generation panel pulls the hull downward is 6,928 tons. When a power generation state is entered with respect to a state where the ship is floating in an unloaded state, such a load is applied to the hull, and the draft of the hull becomes deeper. If the buoyancy of the hull is 20,000 tons or more, this scheme will hold because it will not become unstable with this level of load. This power generation amount is close to the middle of 330,000 kW of total output of the Kurobe River No. 4 power plant. When considered as a hydropower plant, this scheme is likely to be economically viable.

In this trial calculation example, the size and number of power generation units did not appear. This is because 1 m2 was used as a unit area, and the number of units was not necessary in this calculation. Although not shown in the table, from a practical standpoint, it is assumed that one power generation unit will share approximately 15m2 of the tidal current received by the tidal power generation panel. The cross-sectional area of the duct structure forming the outer shape of the power generation unit inserted and loaded in the duct-shaped receiving space formed by the assembly holding body of the tidal current power generation panel will be 12 to 10 m2. In that case, the required number is 2,000. The number is large, but not enough. If the power generation unit is of this size, it can be mass-produced by existing technology and existing equipment such as the transport machinery industry, and can be handled by an automatic material handling device (automatic attachment / detachment device).
For example, if the target is 150,000 kW for total output, comparing the production of 150 kW machines with the individual production system and mass production of 2,000 75 kW machines with the mass production system, The effect of increasing the total amount of materials in proportion to the dimension L according to the L-square cube law due to the large number of units (the latter is 42% of the former if it is a similar design), and the general per unit area by the tidal power generation panel method The latter is overwhelmingly economical, with the effect of increasing the output by a factor of 2 over that of a turbine generator.

The above description does not touch on the details of the structure of the power generation unit, which is the main component of the tidal current power generation panel, and the loading on the tidal current power generation panel. It has the same design concept as a power generation unit. Omitted to avoid duplication.

FIG. 3 is a side view of a moored tidal power generation ship having three or more mooring lines. When the hull starts to deviate from the front due to yawing, the tension of the third and fourth auxiliary mooring lines 22 emitted from the mooring relay point 5 always tries to minimize the distance between the mooring relay point 5 and the bow. A strong restoring force works to return the posture of the camera to the normal position.
The configuration of the auxiliary mooring line 22 and the auxiliary mooring point 23 generates a clockwise rotational force about the drag center 21 to which the power generation drag of the tidal current power generation panel 8 is applied. In order to generate a counterclockwise rotational force balanced with the rotational force, the mooring point 7 of the ship side mooring line 6 must be provided slightly below the drag center 21. This geometrical configuration corresponds to “Claim 3” of “Claims”.

FIG. 4 is a side view of a moored tidal power generation ship that suspends the power generation panel 8 in front of the buoyancy center 24. A hull that suspends and fixes a tidal current power generation panel having a vertical dimension of 200 m around the center of buoyancy is approximately twice as long as a 400 m class length. The above-mentioned “third means for solving the problem” is to shorten this. Let me give you a numerical example. When the inclination angle of the ship-side mooring line 6 with respect to the sea surface is 30 degrees, the tidal power generation panel 8 is set to a length of 1 and the rotating shaft structure 12 that is the suspension / fixation position of the tidal power generation panel is approximately 0.43 forward from the buoyancy center 24. The counterclockwise rotational force caused by the drag generated when the mooring point 7 is positioned approximately 0.25 below the drag center 21 of the tidal current power generation panel and the clockwise rotational force generated by the buoyancy are balanced. The “third measure” is established. In this case, the total length of the hull can be shortened to 300 m or less, and the vertical dimension of the tidal current power generation panel can be brought closer to the total length of the hull. FIG. 4 illustrates this state.

Not only the above-mentioned specific solution but generally the suspension / fixation position of the rotating shaft structure 12 is selected at any position from the buoyancy center 24 to the bow, and the position where the above-mentioned two rotational forces are balanced is obtained by calculation. A mooring point 7 can be provided at the position. In this geometric configuration, a very large rotational force is applied to the hull and the tidal power generation panel suspension / fixation part, so that a considerable mechanical strength is required. It is necessary to comprehensively judge the benefits of shortening the hull and the burden of increasing mechanical strength. This geometrical configuration corresponds to “Claim 4” of “Claims”.

FIG. 5 is a side view of a tidal current moored tidal power generation ship. A stern side submarine foundation 31, a stern side foundation mooring line 32, a stern side mooring relay point 33, a stern side mooring line 34, and a stern side mooring point 35 are provided symmetrically with the tidal power generation panel 8 as a symmetrical plane. ing.
As for the tidal current, a full tide and a low tide occur twice a day, and the direction of the flow is reversed four times. The geometric configuration of FIG. 5 can operate in response to tidal currents. The technology of bidirectional flow hydro turbine that can be applied to tidal flow has been established. There are a tidal period when the flow velocity of the tidal current is around the peak and a tide period where the flow is stopped, and power cannot be generated before and after the tidal period. However, in the fast tide period, there are many sea areas where the flow velocity is faster than that of general tides, and it is possible to compensate for the low rate of overall facility operation with the speed of the flow velocity. This geometrical configuration corresponds to “Claim 5” of “Claims”.

FIG. 6 is a front view of a mooring-type underwater tidal current power generation facility using a mooring line, and the right side of FIG. 7 is a side view. The left side of FIG. 7 is a side view of a self-supporting underwater support tidal power generation facility. The two types of power generation facilities in FIG. 7 use essentially the same tidal power generation panel, but there is a difference in the method of supporting it in the sea against the tidal current. The comparison between these two drawings is for comparative evaluation of the characteristics and economics of both types. These figures depict the situation where the distance from the sea surface to the sea floor is 400 m, the tidal current zone is from the sea surface to 200 m, and the flow velocity decreases rapidly at depths below that.

FIG. 6 will be described. This mooring-type underwater tidal power generation facility has a forward submarine foundation 41, six front mooring lines 42 visible in FIG. 6, six front mooring points 43 visible, tidal current power generation panel 44, two legs 45 and columns 47, 2, respectively. It consists of a single leg submarine foundation 46 and an upper structure 48 on the pillar. The power received by the tidal current power generation panel 44 from the power generation unit by electromagnetic induction in a contactless manner is sent to the upper structure 48. In the upper structure 48, a power plant, a hydrogen generation plant, a power generation unit storage, an automatic attachment / detachment device, a control room, and the like are installed.

In addition, this geometrical structure receives the drag force of the tidal current coming from the upstream side with the tension of the mooring line, but in the unlikely event that a strong flow from the downstream side is hit by a tsunami etc., there is a risk of falling toward the upstream side There is sex. As shown in the right view of FIG. 7, a rear seabed foundation 49, a rear mooring line 50, and a rear mooring point 51 are provided for safety enhancement. This mooring system has a truss structure as a whole, and keeps the mechanical strength of the tidal power generation panel including the legs high.

Here, let us evaluate the difference in the method for ensuring the mechanical strength between the left diagram and the right diagram in FIG. Although “Patent Document 2” does not touch on details of the main column structure, it seems to be a rigid self-supporting structure having sufficient mechanical strength in the vertical and horizontal directions toward the tidal current. Following the numerical example above, a tidal power generation panel with a length of 200 m, a width of 150 m and a tidal current facing area of 30,000 m2 is about 150,000 kW, and the total power of the tidal power generation panel and main column structure is 2 m / s. Generates a drag exceeding 10,000 tons. The main pillar structure that supports this is a structure that is much higher than ordinary high-rise buildings, and loads of several tens of thousands of tons are always applied in the tidal direction.
The side of the main column structure of the self-supporting underwater tidal power generation facility shown in the left figure of FIG. 7 has a shape similar to that of an aircraft tail. This is a geometry that has rigidity suitable for receiving a huge power generation drag in the tidal direction. It is a scientific structure. The total cost of installing such a structure on the sea floor will be enormous. In the previous “Example 1”, it was explained that the total cost can be drastically reduced by using three kinds of effects by using a large number of small output units. If the cost of the column structure is huge, this scheme loses economic efficiency.

The concept of the moored underwater support tidal power plant was obtained from such reflection. At the same output, the material requirements and total cost of the tidal power generation panel, strut / upper structure, and leg structure are considered to be equivalent to those of a moored tidal power generation ship. In the right figure of Fig. 7, there are four submarine foundations, and it is a concern that the required number is large, but if technology that can automate the construction of submarine foundations is put into practical use, the problem of cost will be solved considerably.
The geometric configuration of the moored underwater support tidal power generation facility corresponds to “Claim 6” of “Claims”.

FIG. 8 is a partial horizontal cross-sectional view of a tidal current power generation panel provided with a high-resistance projecting portion. The tidal current 61 flows downward from above. The tidal power generation panel frame structure 62 is a mechanical strength member of the entire tidal current power generation panel, and is provided with a high resistance projecting portion 63 from here to the upstream. A collective holding body 64 is supported by the frame structure 62. In the case of a moored tidal current power generation ship, the power generation unit 65 is inserted and loaded into the duct-shaped receiving space of the collective holding body 64 from the downstream side (up in the storage mode) in FIG. The mountain-shaped portion of the collective holding body 64 is a rectifying blade that adjusts the water flow entering the power generation unit from upstream.
Assuming that the tidal current receiving area is 1, the sum of the hydraulic turbine operating areas of all the power generation units is smaller than 1, for example, 0.8 to 0.6. This geometric configuration forms a conversion diversion nozzle, which accelerates the water flow velocity by the nozzle effect. The output of the power generation unit increases with the cube of the flow velocity, but the output (work amount) is the product of the flow velocity (distance) and the power generation drag (force), and the power generation drag may physically exceed the drag of the tidal power generation panel. Since this is not possible, there is a limit to the increase in output due to the nozzle effect. The shape of the tidal current power generation panel is basically a flat plate, and the drag coefficient is about 1.1. When the high resistance protrusion 63 is provided on the edge of the flat plate, the drag coefficient slightly increases. Drag generates a water head before and after the tidal power generation panel, and the larger the water head, the larger the maximum output of the power generation unit, and the greater the output per area facing the tidal current.

This is a method of driving a hydro turbine by installing a huge partial weir (a kind of dam) in the tidal current and generating a pressure difference before and after. When the output per unit area of the method of placing a hydro turbine in an open tidal current is 1, the tidal power generation panel method can extract more than twice as much output, as described in “Means for Solving Problems” Explained in "Six Means".
This means that the tidal power generation panel system requires a smaller tidal cross-sectional area for the same target output, compared to many tidal power generation demonstrators that are currently working on open tidal currents. This means that it can be made smaller and more powerful. This geometrical configuration corresponds to “Claim 8” of “Claims”.

In Example 1 of the present invention, a tidal power generation panel of 30,000 m 2 is given as a numerical example, and an estimated output of about 150,000 kW was shown at a tidal current of 2 m per second. According to a certain company's document, the rated output of a wind power generator with a rotor diameter of 100 m is 3,000 kW. When compared with the rated output, the 50 wind power generators correspond to one moored tidal current power generation ship in the numerical example described above.
The components of a wind generator are a solid foundation, struts, a rotatable generator nacelle, and a wind turbine, which are superbly simple. On the other hand, the mooring-type tidal power generation ship has a tidal power generation panel suspended and fixed to a catamaran of about 20,000 tons moored to the submarine foundation and mooring line, and there is a power plant, hydrogen generation plant, control facility, etc. in the space on the ship. It is a complex plant complex placed. In light of industrial common sense, it would be judged that wind power generation would be cheaper than tidal power generation for the same rated output.
However, the speed and direction of wind always fluctuate greatly, but fluctuations in the flow velocity and direction of the tidal current are extremely small compared to wind power. Compared to the total power generation efficiency (total facility utilization rate) obtained by dividing the total power generated by actual operation for one year by the total power generated by operating for the same period at the rated output, onshore wind power generation is 20% On the other hand, offshore wind power generation is rated as 30%, while tidal power generation can be expected to be 90%. Comparing the unit price of power generation with the total annual power generation, the economics and maintainability of mooring-type tidal power generation boats and tethered underwater tidal power generation facilities using tidal power generation panels are extremely attractive.

DESCRIPTION OF SYMBOLS 1 Sea surface 2 Seabed 3 Submarine foundation 4 Foundation side mooring line 5 Mooring relay point 6 Ship side mooring line 7 Mooring point 8 Tidal power generation panel 9 (in operation mode) Tidal power generation panel 10 in storage mode Hull 11 Upper structure 12 Rotating shaft structure 21 Drag Center 22 Auxiliary Mooring Line 23 Auxiliary Mooring Point 24 Buoyancy Center 31 Stern Side Submarine Foundation 32 Stern Side Foundation Mooring Line 33 Stern Side Mooring Relay Point 34 Stern Side Mooring Line 35 Stern Side Mooring Point 41 Front Submarine Foundation 42 Forward Mooring Cable 43 Front mooring point 44 Tidal power generation panel 45 Leg 46 Leg submarine foundation 47 Post 48 Upper structure 49 Rear seabed 50 Rear mooring cable 51 Rear mooring point 52 Main column structure 61 Water flow 62 Frame structure 63 High resistance Protruding portion 64 assembly holding body 65 power generation unit

Claims (8)

  Consists of a strong frame structure and a flat aggregate holder supported by the frame structure, and the aggregate holder is configured to receive and hold several tens to tens of thousands of duct-shaped power generation units. The power generation unit is mechanically and electrically coupled with the assembly holder by the operation of being inserted into the assembly holder by the automatic attachment / detachment device, and the power generation unit having the opposite operation is the automatic attachment / detachment device. The mechanical coupling and the electrical coupling are released by the action of being pulled out from the assembly holding body by the above, and the frame structure is provided with a plurality of mooring points for connecting mooring lines originating from the seabed mooring foundation. The mooring line receives the drag received from the tidal current by power generation by suspending and fixing the upper end to a hull such as a catamaran with large buoyancy. Hull Responsible for the buoyancy that keeps the frame structure in a vertical position against the vertical downward pulling force generated by the mooring lines that are stretched for the purpose, and if necessary, release the anchor to the hull and rotate the frame structure at a right angle The mooring type tidal current power generation ship that is maintained in a horizontal state and is maintained at sea, and in the second case, the leg that is the lower end is fixed to the bottom seabed foundation and the drag received from the tidal current by power generation is the same as that of the mooring line. The submarine support tidal power generation facility is configured to maintain the frame structure in a vertical posture by sharing with the above-mentioned leg submarine foundation. In each case, the electric power received from the tidal power generation unit by the above-described electrical coupling is used. It is sent to the upper structure provided on the shipboard such as a shipboard or above the sea surface of the frame structure of the underwater support type tidal power generation facility, where the production of an energy medium such as hydrogen or direct power transmission is performed. Tidal power generation facility Tidal power generation panel used.   In a mooring type tidal power generation vessel that vertically suspends and fixes a tidal power generation panel that is rotatable with respect to the hull between two hulls at the center of the buoyancy of a catamaran, on the horizontal line passing through the power generation drag center of the tidal power generation panel. The aforementioned mooring points are provided on the left and right sides of the frame structure, and the two mooring lines from the two mooring points are moored at an equal distance in the range of 2 to 20 times the distance between the mooring points. The tidal current power generation panel according to claim 1, wherein a foundation-side mooring line that is collected at a relay point and extended from a seabed mooring foundation is connected to the mooring relay point.   A mooring type tidal power generation ship that vertically suspends and fixes a tidal power generation panel that is rotatable with respect to the hull between two hulls at the center of the buoyancy of a catamaran, and passes slightly below the center of power generation drag of the tidal power generation panel. One mooring point is provided at each of the left and right sides of the frame structure on the horizontal line, and two ship side mooring lines originating from the two mooring points are in the range of 2 to 20 times the interval between the mooring points. By gathering at a mooring relay point at a distance and installing one or two auxiliary mooring lines at the mooring relay point and mooring at a mooring point provided at the front of the hull, the power generation drag center and the ship side mooring line can be moved vertically. The tidal current power generation panel according to claim 1, wherein the tidal power generation panel is formed by canceling the rotational force generated due to the separation by the tension of the auxiliary mooring line and connecting the foundation side mooring line extending from the seabed mooring foundation to the mooring relay point.   In a moored tidal power generation ship that vertically suspends and fixes a tidal power generation panel that is rotatable relative to the hull between the two hulls at a position upstream of the tidal current from the catamaran's buoyancy center, Rotation that generates drag applied to the drag center around the two mooring points on the tidal power generation panel by providing one mooring point on each side of the frame structure on the horizontal line passing below the center. The force is canceled by the reverse rotational force generated because the suspension point does not match the buoyancy center, and the two mooring lines on the ship side are in the range of 2 to 20 times the distance between the two mooring points. The tidal current power generation panel according to claim 1, wherein the tidal power generation panel is formed by collecting at a mooring relay point at equal distances and connecting a mooring line on a base side extending from the submarine mooring base to the mooring relay point.   Two mooring points, two ship-side mooring lines, one mooring relay point, and one base-side mooring line in the mooring-type tidal power generation system symmetrically in front and rear of the power generation panel in the tidal current full tide direction and the tidal direction The tidal current power generation panel according to claim 1, wherein a tidal current power generation panel according to claim 1, capable of dealing with a tidal current in which the direction of the water current is reversed depending on the time zone, is provided with a set of two mooring foundations in each, a total of two sets in front and rear.   Moored from both the upstream and downstream sides to the first set of mooring lines originating from the seabed mooring foundation provided upstream of the tidal current and the second set of mooring lines originating from the seabed mooring foundation provided downstream from the tidal current The lower end of the tidal power generation panel has a leg portion extending until the vertical portion of the frame structure reaches the seabed, and the column portion extending the vertical portion of the frame structure until reaching the sea at the upper end. And the above-mentioned legs can be removably attached to the submarine leg support foundation, and the above-mentioned support supports the upper structure at sea, and the electric power plant, hydrogen generation plant, and power generation unit are stored in the upper structure. The tidal current power generation panel according to claim 1, wherein various facilities such as a storage, an automatic attachment / detachment device, and a control room are installed.   After building on land, ascend and tow to the site, and when arriving at the site, the mooring line connects the mooring point of the power generation panel and the submarine mooring foundation, and pulls between the lower leg and the submarine foundation of the power generation panel to enter the sea After sinking, the above-mentioned leg and the above-mentioned leg submarine foundation are connected and fixed, and the power generation panel can enter the operating state perpendicular to the sea surface. When it is necessary to connect and fix the above-mentioned leg submarine foundation and the above-mentioned leg, or disconnect the above-mentioned submarine mooring foundation and the above-mentioned mooring line, the entire structure including the tidal power generation panel is brought back to the sea surface again. The tidal current power generation panel according to claim 6, wherein the tidal power generation panel according to claim 6 is configured to be levitated and towed to a facility on land to perform necessary repairs on the ground.   2. The drag coefficient is slightly higher than that of the flat plate surface by projecting a substantial amount of the outer peripheral portion of the frame structure from the flat plate surface on which the power generation unit is attached toward the direction of the tidal current. The tidal power generation panel described in 1.

Images