JP4595715B2 - Submarine type ocean current power generation equipment - Google Patents

Submarine type ocean current power generation equipment Download PDF

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JP4595715B2
JP4595715B2 JP2005193593A JP2005193593A JP4595715B2 JP 4595715 B2 JP4595715 B2 JP 4595715B2 JP 2005193593 A JP2005193593 A JP 2005193593A JP 2005193593 A JP2005193593 A JP 2005193593A JP 4595715 B2 JP4595715 B2 JP 4595715B2
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正治 内田
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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本発明は、海流のエネルギーを利用して発電を行う海流発電装置を組み込んで海底に設置される海流発電設備に関するものである。 The present invention relates to marine current power equipment installed in seabed incorporate marine current power equipment for generating electric power by utilizing the energy of ocean currents.

近年、世界規模でのエネルギー需要の急速な増大に伴い、これまでもっぱら依存していた石油やＬＮＧ等の化石燃料や原子力等のエネルギー源の代替あるいは新たに加えるエネルギー源として、枯渇や公害の虞のない自然エネルギーを利用しようとする様々な研究開発が積極的に進められている。   In recent years, with the rapid increase in energy demand on a global scale, there is a risk of depletion and pollution as an alternative or newly added energy source such as fossil fuels such as oil and LNG, nuclear power, etc. Various research and development efforts are being made to use natural energy without energy.

このような自然エネルギーとしては、太陽光、潮流、風力等が利用可能であるが、いずれも時間や季節によって変動するという欠点を有している。これに対して、特に我が国においては、面積が小さい反面、周囲が海に囲まれているために、時間や季節に関係なく、しかも無限であってエネルギー密度の高い海流を利用した発電が可能となれば、有力なエネルギー源として活用することが可能になる。   As such natural energy, sunlight, tidal current, wind power, and the like can be used, but all have the disadvantage of fluctuating with time and season. On the other hand, especially in Japan, the area is small, but the surrounding area is surrounded by the sea, so it is possible to generate power using ocean currents that are infinite and have high energy density regardless of time or season. Then, it can be used as a powerful energy source.

図５は、下記特許文献１において提案されている海流を利用した海流発電潜水船を示すものである。
この海流発電潜水船は、流速と流向が安定している海流に、流れに直面する導管Ａと発電機Ｃを持つ浮体Ｂを、船首から係留索９と錨１０によって所定の深さに係留したものであり、導管Ａに流れる海流エネルギーを水車６と発電機Ｃによって電気エネルギーに変換し、海底送電線７で陸地に送電するようにしたものである。 FIG. 5 shows an ocean current power generation submarine utilizing ocean currents proposed in Patent Document 1 below.
In this ocean current power generation submarine, a floating body B having a conduit A and a generator C facing a flow is moored at a predetermined depth from the bow by a mooring line 9 and a anchor 10 in a current with a stable flow velocity and direction. The ocean current energy flowing in the conduit A is converted into electrical energy by the water turbine 6 and the generator C, and is transmitted to the land by the submarine power transmission line 7.

ここで、浮体Ｂは、その船首全面が取水口１とされ、水車６が装着される取水口１と船尾の排水口２とを結ぶ導管Ａのほぼ中央の海流に垂直な断面積は、取水口１の同断面積の数十分の一に圧縮した円形に形成されている。この結果、水車６の位置の海水の流速は取水口１の海流の流速の数十倍に加速されるために、海流エネルギーを活用して、大容量の電力を得ることができるとされている。
特開平７−２５９０６４号公報 Here, the floating body B has a water intake 1 on the entire bow, and the cross-sectional area perpendicular to the ocean current at the center of the conduit A connecting the water intake 1 to which the water turbine 6 is mounted and the stern drain 2 is the water intake. The mouth 1 is formed in a circular shape compressed to a few tenths of the same cross-sectional area. As a result, since the flow velocity of the seawater at the position of the water turbine 6 is accelerated to several tens of times the flow velocity of the ocean current at the intake port 1, it is said that a large amount of power can be obtained by utilizing ocean current energy. .
Japanese Patent Laid-Open No. 7-259064

しかしながら、上記従来の海洋発電潜水船にあっては、導管Ａの中央における断面積を、取水口１の断面積の数十分の一に圧縮しているために、理論上は水車６の取付部における海流の速度が数十倍に加速されることになるが、実際には、発電機Ｃによる水車６の回転負荷抵抗や、導管Ａ内における流路抵抗によって、導管Ａ内における海流の流量が浮体Ｂの周囲よりも遙かに小さくなってしまう。   However, in the conventional marine power generation submersible, since the cross-sectional area at the center of the conduit A is compressed to several tenths of the cross-sectional area of the intake port 1, the mounting of the water turbine 6 is theoretically performed. The speed of the ocean current in the section is accelerated several tens of times. Actually, however, the flow rate of the ocean current in the conduit A depends on the rotational load resistance of the water turbine 6 by the generator C and the channel resistance in the conduit A. Becomes much smaller than the periphery of the floating body B.

この結果、両者間の海水流量の差に起因して、浮体Ｂには、海流方向にその断面積に比例する大きな押圧力が作用し、このため、特に発電に適した流速の高い海流にあっては、係留索９によって浮体６を定位置に保持しておくことが困難になるという問題点がある。
さらに、万一水車６が回転不能に陥ったような際には、浮体Ｂの全断面積に対して、海流が圧力として作用するために、係留索９が切断される虞もある。 As a result, due to the difference in the seawater flow rate between them, a large pressing force proportional to the cross-sectional area acts on the floating body B in the direction of the ocean current. Therefore, there is a problem that it becomes difficult to hold the floating body 6 in a fixed position by the mooring cable 9.
Furthermore, in the unlikely event that the water turbine 6 becomes unrotatable, the mooring line 9 may be cut because the ocean current acts as pressure on the entire cross-sectional area of the floating body B.

また、浮体Ｂを係留索９によって所定の深さに浮遊状態で係留しているために、その姿勢を安定的に保持させることが難しいという問題点もある。
加えて、１基の水車６および発電機Ｃによって大容量の電力を得ようとするものであるために、故障やメンテナンスを考慮すると、連続して所望の電力を得ることが難しいという欠点もある。 Moreover, since the floating body B is moored in a floating state at a predetermined depth by the mooring line 9, there is also a problem that it is difficult to stably maintain the posture.
In addition, since a large amount of power is to be obtained by the single water turbine 6 and the generator C, there is a drawback that it is difficult to obtain desired power continuously in consideration of failure and maintenance. .

この発明は、かかる事情に鑑みてなされたもので、発電用の翼体が設けられた海流導管内に円滑に所望の海流を形成することができ、よって高い発電性能を得ることができる海流発電装置を組み込んだ据え付け性および操業安定性に優れる海底設置型海流発電設備を提供することを課題とするものである。 The present invention has been made in view of such circumstances, and it is possible to smoothly form a desired ocean current in an ocean current conduit provided with a power generation wing body, thereby obtaining high power generation performance. it is an object of the present invention to provide a seabed installation type ocean current power generation equipment having excellent mounting property and operation stability incorporating equipment.

上記課題を解決するために、請求項１に記載の本発明に係る海底設置型海流発電設備は、曳航可能な浮力を有する構造体に、両端に海流の流入口と流出口が形成された筒状の第１の海流導管と、この第１の海流導管内に設けられ、両端に形成された海流の流入口および流出口がそれぞれ上記第１の海流導管の内部に位置する筒状の第２の海流導管と、この第２の海流導管内に回転自在に設けられ、上記海流によって回転する翼体と、この翼体の回転によって発電する発電装置とを備えた海流発電装置が組み込まれるとともに、上記構造体には、当該構造体を海底に着底させるに十分な容量の海水を貯水可能なバラストタンクと、このバラストタンクに上記海水を流入させる貯水手段とが設けられていることを特徴とするものである。 In order to solve the above-mentioned problems, the submarine installation type ocean current power generation facility according to the present invention described in claim 1 is a cylinder having a towable buoyancy structure and an ocean current inlet and outlet formed at both ends. A first ocean current conduit having a cylindrical shape, and a cylindrical second current outlet provided in the first ocean current conduit and having an inlet and an outlet of the ocean current formed at both ends are located inside the first ocean current conduit, respectively. An ocean current power generation device including a current flow conduit, a wing body rotatably provided in the second current flow conduit and rotating by the ocean current, and a power generation device generating electric power by the rotation of the wing body ; the aforementioned structure, and store water ballast tanks seawater sufficient capacity to bottom landing the structure to the seabed, and features that you have a water storage means for flowing the seawater are provided in the ballast tank To do.

ここで、請求項２に記載の発明は、請求項１に記載の発明において、上記第１の海流導管および／または第２の海流導管は、少なくともその両端部が上記流入口または流出口に向けて漸次内法寸法が大きくなるテーパー状に形成されていることを特徴とするものである。   The invention according to claim 2 is the invention according to claim 1, wherein at least both ends of the first ocean current conduit and / or the second ocean current conduit are directed toward the inlet or the outlet. Thus, it is formed in a taper shape with gradually increasing internal dimensions.

さらに、請求項３に記載の発明は、請求項１または２に記載の構造体に、複数基の上記海流発電装置が並列的に組み込まれていることを特徴とするものである。 The present invention as described in claim 3, the structure according to claim 1 or 2, in which the marine current power device of the plurality groups is equal to or incorporated in parallel.

請求項１〜３のいずれかに記載の海底設置型海流発電設備においては、発電を行う海流発電装置が、両端に海流の流入口と流出口が形成された筒状の第１の海流導管内に、この第１の海流導管よりも長さの短い第２の海流導管を設けた２重管構造とし、この第２の海流導管内に発電を行うための翼体を回転自在に設けているので、流入口から第１の海流導管内に導かれた海流は、第２の海流導管内への流れと、その外方の第１の海流導管と第２の海流導管との間の流れとに分流される。 In the submarine installation type ocean current power generation equipment according to any one of claims 1 to 3, an ocean current power generation device for generating power is provided in a cylindrical first ocean current conduit having an ocean current inlet and an outlet formed at both ends. In addition, a double-pipe structure is provided in which a second ocean current conduit having a length shorter than that of the first ocean current conduit is provided, and a wing body for generating power is rotatably provided in the second ocean current conduit. Therefore, the ocean current guided from the inlet into the first ocean current conduit is a flow into the second ocean current conduit and a flow between the first ocean current conduit and the second ocean current conduit outside thereof. To be diverted to

次いで、第２の海流導管内に流入した海流によって、翼体が回転し、発電装置によって発電が行われる。そして、翼体を回転させることによりエネルギーが減少した海流は、その流速を落として第２の海流導管内を流出口に向けて流れ、第１および第２の海流導管間を流れた海流と合流する。   Next, the wing body is rotated by the ocean current flowing into the second ocean current conduit, and power generation is performed by the power generator. Then, the ocean current whose energy has been reduced by rotating the wing body decreases its flow velocity and flows in the second ocean current conduit toward the outlet, and merges with the ocean current that flows between the first and second ocean current conduits. To do.

この際に、第１および第２の海流導管間を流れる海流は、エネルギーを減じることなく、流入時の流速とほぼ等しい流速で流れるために、第２の海流導管内の海水は、いわゆるエジェクター効果により第１および第２の海流導管間を流れる海流によって吸引される。
この結果、第２の海流導管内の海水の流れが促進されて発電効率が向上する。 At this time, the ocean current flowing between the first and second ocean current conduits flows at a flow velocity substantially equal to the flow velocity at the time of inflow without reducing energy, so that the seawater in the second ocean current conduit is a so-called ejector effect. By the ocean current flowing between the first and second ocean current conduits.
As a result, the flow of seawater in the second ocean current conduit is promoted, and the power generation efficiency is improved.

また、第２の海流導管へと流入する海流と、第１および第２の海流導管間へと流入する海流との圧力は略等しいために、万一第２の海流導管側への流入抵抗が高くなった場合においても、海流がその外周側の第１および第２の海流導管間へと迂回流入するために、装置全体に海流方向へ過度の押圧力が作用することがない。   In addition, since the pressure of the ocean current flowing into the second ocean current conduit and the ocean current flowing between the first and second ocean current conduits are substantially equal, the inflow resistance to the second ocean current conduit side should be reduced. Even when it becomes high, since the ocean current flows in detour between the first and second ocean current conduits on the outer peripheral side, excessive pressing force does not act on the entire device in the ocean current direction.

さらに、請求項２に記載の発明によれば、第１の海流導管および／または第２の海流導管の少なくとも両端部を、流入口または流出口に向けて漸次内法寸法が大きくなるテーパー状に形成しているので、第２の海流導管内に流入する海流の速度を高めて大きな発電容量を得ることができる。したがって、上記第１の海流導管および第２の海流導管共に、それらの少なくとも両端部を、流入口または流出口に向けて漸次内法寸法が大きくなるテーパー状に形成すれば、一層大きな発電容量を得ることが可能になって好適である。   Furthermore, according to the invention described in claim 2, at least both ends of the first ocean current conduit and / or the second ocean current conduit are tapered so that the inner dimension gradually increases toward the inlet or the outlet. Since it forms, the speed of the ocean current flowing into the second ocean current conduit can be increased to obtain a large power generation capacity. Therefore, if both the first ocean current conduit and the second ocean current conduit are formed in a tapered shape in which the inner dimensions gradually increase toward the inlet or the outlet, a larger power generation capacity can be obtained. It can be obtained and is preferable.

さらに、請求項３に記載の発明によれば、上記構造体に、複数基の上記海流発電装置を並列的に組み込んでいるために、仮に１基または数基の発電装置が損傷を受けた場合にも、得られる電力は低下するものの、継続的な電力供給を行うことが可能になる。また、メンテナンス時においても、順次上記海流発電装置を停止させることにより、必要な電力供給に支承を招くことがない。 Further, according to the invention described in claim 3, in the structure, if in order to incorporate the ocean current power generation system of the plurality groups in parallel, if 1 group or several groups power generator is damaged In addition, although the obtained power is reduced, it is possible to continuously supply power. In addition, even during maintenance, the above-mentioned ocean current power generation device is sequentially stopped, so that support for necessary power supply is not caused.

図１〜図４は、本発明に係る海底設置型海流発電設備の一実施形態を示すもので、図中符号２０が構造体である。
この構造体２０は、底板２１と天板２２とが一対の側板２３によって一体化された外観略筒状のもので、長手方向の両端に開口部が形成されている。そして、一方の開口部に、海流の流入口２４が形成されるとともに、他方の開口部に、海流の流出口２５が形成されている。 1 to 4, shows one embodiment of a locking Ru submarine stationary marine current power equipment present invention, reference numeral 20 is a structure.
The structural body 20 has a substantially cylindrical shape in which a bottom plate 21 and a top plate 22 are integrated by a pair of side plates 23, and openings are formed at both ends in the longitudinal direction. An ocean current inlet 24 is formed at one opening, and an ocean current outlet 25 is formed at the other opening.

また、この構造体２０の内部には、断面積が流入口２４および流出口２５の面積よりも小さい角筒状の据付枠２６が配設されている。そして、構造体２０の底板２１、天板２２および側板２３と、対向する据付枠２６の底板、天板および側板との間が、傾斜板状の内壁板２０ａ、２０ｂ、２０ｃによって塞がれることにより、構造体２０の上下部および側部には、それぞれバラストタンク２７が形成されている。   In addition, a rectangular tubular installation frame 26 having a cross-sectional area smaller than the area of the inflow port 24 and the outflow port 25 is disposed inside the structure 20. And the bottom plate 21, top plate 22 and side plate 23 of the structure 20 and the bottom plate, top plate and side plate of the opposing installation frame 26 are closed by the inclined plate-like inner wall plates 20a, 20b and 20c. Thus, ballast tanks 27 are formed on the upper and lower portions and the side portions of the structure 20 respectively.

なお、バラストタンク２７は、空の状態で構造体２０に曳航可能な浮力を与えるとともに、内部に海水を貯水した際に、当該構造体２０を海底４０に着底させるに十分な容量に設定されている。   The ballast tank 27 is set to a capacity sufficient to give a towable buoyancy to the structure 20 in an empty state and allow the structure 20 to settle on the seabed 40 when seawater is stored therein. ing.

これにより、流入口２４から取付枠２６の一端開口側に向けて漸次内法寸法が小さくなる海流の流入路２８が形成されるとともに、さらに取付枠２８の他端開口側から流出口２５に向けて漸次内法寸法が大きくなる海流の流出路２９が形成されている。
また、構造体２０の天板２２の四角隅部には、それぞれバラストタンク２７内を開閉する開閉弁（貯水手段）３４ａが設けられるとともに、側板２３の下部角隅部にも、同様の開閉弁（貯水手段）３４ｂが取り付けられている。 As a result, an inflow path 28 of the ocean current gradually decreases from the inflow port 24 toward the one end opening side of the mounting frame 26, and further from the other end opening side of the mounting frame 28 toward the outflow port 25. Thus, an outflow passage 29 for the ocean current in which the internal dimension gradually increases is formed.
In addition, on the square corners of the top plate 22 of the structure 20, on-off valves (water storage means) 34 a for opening and closing the inside of the ballast tank 27 are provided, and the same on-off valves are also provided on the lower corners of the side plates 23. (Water storage means) 34b is attached.

他方、取付枠２６内は、水平方向中央部に設けられた１枚の隔壁２６ａおよび上下方向に設けられた４枚の隔壁２６ｂによって合計１０の海流導管（第１の海流導管）３０が区画形成されている。なお、中央部の隔壁２６ａは、さらに流入口２４および流出口２６に向けて延出されることにより、流入路２８および流出路２９の約１／２を仕切るように形成されている。   On the other hand, in the mounting frame 26, a total of ten ocean current conduits (first ocean current conduits) 30 are defined by one partition wall 26a provided in the horizontal central portion and four partition walls 26b provided in the vertical direction. Has been. The central partition 26 a is further extended toward the inflow port 24 and the outflow port 26 so as to partition about ½ of the inflow path 28 and the outflow path 29.

そして、各海流導管３０内には、当該海流導管３０と２重管構造となる海流導管（第２の海流導管）３１が設けられている。この海流導管３１は、外側の海流導管３０よりも長さ寸法が小さい角管状に形成されており、これにより両端に海流の流入口３２と流出口３３とが形成されるとともに、両端部３１ａがそれぞれ流入口３２または流出口３３に向けて漸次内法寸法が大きくなるテーパー状に形成されている。   In each ocean current conduit 30, an ocean current conduit (second ocean current conduit) 31 having a double pipe structure is provided. The ocean current conduit 31 is formed in a rectangular tube having a smaller length than that of the outer ocean current conduit 30, whereby an ocean current inlet 32 and an outlet 33 are formed at both ends, and both ends 31 a are formed. Each of them is formed in a tapered shape in which the inner dimension gradually increases toward the inflow port 32 or the outflow port 33.

そして、各々の海流導管３１における流入口３２および流出口３３の間の中央部に、軸流水車（翼体）３５が回転自在に取り付けられるとともに、この軸流水車３５の回転軸と一体化された発電機（発電装置）３６が設けられている。これにより、構造体２０内の内壁板２０ａ、２０ｂによって形成される海流の流入路２８および流出路２９と、取付枠２６によって画成された海流導管３０と、各海流導管３０内に設けられた海流導管３１と、この海流導管３１内に設けられた軸流水車３５および発電機３６によって、海流発電装置が構成されている。   An axial water turbine (blade body) 35 is rotatably attached to a central portion between the inlet 32 and the outlet 33 in each ocean current conduit 31 and is integrated with a rotating shaft of the axial water turbine 35. A generator (power generation device) 36 is provided. Thereby, the ocean current inflow passage 28 and the outflow passage 29 formed by the inner wall plates 20 a and 20 b in the structure 20, the ocean current conduit 30 defined by the mounting frame 26, and each ocean current conduit 30 are provided. An ocean current power generation apparatus is constituted by the ocean current conduit 31, the axial water turbine 35 and the generator 36 provided in the ocean current conduit 31.

なお、図中符号３７は、構造体２０の底板２１に長手方向に突設されて、海底４０の砂地内に食い込む係留板であり、符号３８は、構造体２０の天板２２の４隅に一端が固定され、他端に係留用の錨３９が取り付けられた錨鎖である。   In the figure, reference numeral 37 denotes a mooring plate that protrudes in the longitudinal direction on the bottom plate 21 of the structure 20 and bites into the sand of the seabed 40, and reference numeral 38 denotes four corners of the top plate 22 of the structure 20. It is a anchor chain having one end fixed and a mooring anchor 39 attached to the other end.

以上の構成からなる海流発電装置が組み込まれた海底設置型海流発電設備においては、バラストタンク２７をほぼ空の状態で、別途タグボート等によって、例えば津軽海峡等の常時流速の高い海流が得られる海域に曳航する。次いで、据付海域において、構造体２０の海水の流入口２４を海流の流れ方向に対向させた状態で、開閉弁３４ａ、３４ｂを開くことによりバラストタンク２７内に海水を流入させ、海底４０に着底させる。すると、係留板３７が海底４０の砂地に食い込んで当該海底４０に姿勢保持されるとともに、さらに錨鎖３８を引き延ばして投錨する。   In the seafloor-type ocean current power generation facility incorporating the ocean current power generation apparatus having the above-described configuration, a sea area where a high current velocity such as the Tsugaru Strait can be obtained with a separate tugboat or the like with the ballast tank 27 almost empty. Tow to Next, in the installation sea area, with the seawater inlet 24 of the structure 20 facing the flow direction of the ocean current, the seawater flows into the ballast tank 27 by opening the on-off valves 34 a and 34 b and arrives at the seabed 40. Let the bottom. Then, the mooring plate 37 digs into the sandy surface of the seabed 40 and is held on the seabed 40, and the anchor chain 38 is further stretched and anchored.

このようにして海底４０に据え付けられた海底設置型海流発電設備によれば、海流が構造体２０の流入口２４から流入路２８内へと流れ込み、流速を増しながら据付枠２６によって仕切られた各々の海流発電設備における海流導管３０内へと流入する。そして、各海流発電設備においては、海流導管３０内にさらに海流導管３１を設けた２重管構造としているために、海流導管３０内に流入した海流は、流入口３２から海流導管３１内への流れと、その外方の海流導管３１と据付枠２６との間の海流導管３０への流れとに分流される。   According to the submarine installation type ocean current power generation equipment installed on the seabed 40 in this manner, each ocean current flows from the inlet 24 of the structure 20 into the inflow path 28 and is partitioned by the installation frame 26 while increasing the flow velocity. Into the ocean current conduit 30 in the ocean current power generation facility. Since each ocean current power generation facility has a double pipe structure in which the ocean current conduit 31 is further provided in the ocean current conduit 30, the ocean current flowing into the ocean current conduit 30 flows from the inlet 32 into the ocean current conduit 31. The flow and the flow to the ocean current conduit 30 between the outer ocean current conduit 31 and the installation frame 26 are divided.

次いで、海流導管３１内に流入した海流によって、軸流水車３５が回転し、その回転軸に一体化された発電機３６によって発電が行われる。そして、得られた電力は、発電機３６から図示されない電線によって構造体２０の天板２２上に集電され、さらに近隣の陸地まで送られる。他方、軸流水車３５を回転させることによりエネルギーが減少した海流は、その流速Ｖ1を落として流出口３３側に向けて流れ、外側の海流導管３０を流れた海流と合流する。 Next, the axial water turbine 35 is rotated by the ocean current flowing into the ocean current conduit 31, and power is generated by the generator 36 integrated with the rotating shaft. And the obtained electric power is collected on the top plate 22 of the structure 20 by the electric wire which is not illustrated from the generator 36, and is further sent to the nearby land. On the other hand, the ocean current whose energy has been reduced by rotating the axial water turbine 35 flows toward the outlet 33 with the flow velocity V 1 dropped, and merges with the ocean current that has flowed through the outer ocean current conduit 30.

この際に、外側の海流導管３０を流れる海流は、エネルギーを減じることなく、流入時の流速とほぼ等しい流速Ｖ0で流れるために、海流導管３１内の海水は、いわゆるエジェクター効果によりその外側の海流導管３０内を流れる海流によって吸引される。この結果、海流導管３１内の海水の流れが促進されて発電効率が向上する。 At this time, since the ocean current flowing through the outer ocean current conduit 30 flows at a flow velocity V 0 substantially equal to the velocity at the time of inflow without reducing energy, the sea water in the ocean current conduit 31 is outside of the ocean current by the so-called ejector effect. It is sucked by the ocean current flowing in the ocean current conduit 30. As a result, the flow of seawater in the ocean current conduit 31 is promoted and the power generation efficiency is improved.

また、海流導管３１へと流入する海流と、外側の海流導管３０へと流入する海流との圧力は略等しいために、万一軸流水車３５の故障等によって海流導管３１側への流入抵抗が高くなった場合においても、海流がその外周側の海流導管３０へと迂回流入するために、装置全体に海流方向へ過度の押圧力が作用することがない。   In addition, since the pressure of the ocean current flowing into the ocean current conduit 31 and the ocean current flowing into the outer ocean current conduit 30 are substantially equal, the inflow resistance to the ocean current conduit 31 due to a failure of the axial water turbine 35 or the like may occur. Even when it becomes high, the ocean current bypasses into the ocean current conduit 30 on the outer peripheral side thereof, so that excessive pressing force does not act on the entire device in the ocean current direction.

さらに、構造体２０の流入路２８が、海流導管３０に向けて漸次内法寸法が小さくなるテーパー状に形成されているとともに、さらに海流導管３１も流入口３２から内方に向けて漸次内法寸法が小さくなるテーパー状に形成されているために、海流導管３１内において流入する海流の速度を高めて大きな発電容量を得ることができる。   Further, the inflow passage 28 of the structure 20 is formed in a tapered shape in which the inner dimension gradually decreases toward the ocean current conduit 30, and the ocean current conduit 31 is also gradually inner inward from the inlet 32. Since the size of the taper is reduced, the speed of the ocean current flowing in the ocean current conduit 31 can be increased to obtain a large power generation capacity.

また、この海底設置型海流発電設備によれば、構造体２０を曳航して所望の海域まで搬送した後に、開閉弁３４ａ、３４ｂによってバラストタンク２７内に海水を注入することにより、海底４０に着底させて使用することができるため、上記海流発電装置が、海流導管３０，３１による２重管構造とした結果、海流側から過度の押圧力を受けないことと相俟って、安定的な発電を行うことができる。   In addition, according to the submarine installation type ocean current power generation facility, after the structure 20 is towed and transported to a desired sea area, seawater is injected into the ballast tank 27 by the on-off valves 34a and 34b, thereby reaching the seabed 40. Since it can be used at the bottom, the ocean current power generation device has a double-pipe structure with ocean current conduits 30 and 31, so that it does not receive excessive pressing force from the ocean current side, and is stable. It can generate electricity.

さらに、構造体２０に、複数基（本実施形態においては１０基）の海流発電装置を並列的に組み込んでいるために、仮に１基または数基の発電装置が損傷を受けた場合にも、得られる電力は低下するものの、継続的な電力供給を行うことが可能になる。また、メンテナンス時においても、順次上記海流発電装置を停止させることにより、必要な電力供給に支承を招くことがない。   Furthermore, since a plurality of (10 in this embodiment) ocean current power generators are incorporated in the structure 20 in parallel, even if one or several power generators are damaged, Although the obtained electric power is reduced, it is possible to continuously supply electric power. In addition, even during maintenance, the above-mentioned ocean current power generation device is sequentially stopped, so that support for necessary power supply is not caused.

しかも、バラストタンク２７に設けた開閉弁３４ａを閉じて、一方の側板２３側に設けた開閉弁３４ｂを開くとともに、他方の側板２３側に設けた開閉弁３４ｂから圧縮空気を導入して、内部の海水を上記一方の側板２３の開閉弁３４ｂから排水することにより、再び海面上に浮上させて、別の海域に曳航し、再設置して発電を行うこともできる。   Moreover, the on-off valve 34a provided on the ballast tank 27 is closed, the on-off valve 34b provided on the side plate 23 side is opened, and compressed air is introduced from the on-off valve 34b provided on the other side plate 23 side, By discharging the seawater from the open / close valve 34b of the one side plate 23, it is possible to float on the sea surface again, tow to another sea area, and re-install to generate power.

なお、上記実施の形態においては、構造体２０内に１０基の海流発電装置を組み込んだ場合についてのみ説明したが、これに限定されるものではなく、それ以上、あるいはそれ以下の海流発電装置を組み込むこともできる。
また、発電手段としては、上記軸流水車３５に変えて、プロペラ状の発電機等の他の翼体および発電装置を使用することも可能である。 In the above-described embodiment, only the case where 10 ocean current power generators are incorporated in the structure 20 has been described. However, the present invention is not limited to this, and more or less ocean current power generators are provided. It can also be incorporated.
Further, as the power generation means, instead of the axial flow turbine 35, other wing bodies such as a propeller-shaped generator and a power generation device may be used.

本発明の一実施形態を示す全体の斜視図である。1 is an overall perspective view showing an embodiment of the present invention. 図１の正面図である。It is a front view of FIG. 図１の水平方向に断面視した平面図である。FIG. 2 is a plan view viewed in cross section in the horizontal direction of FIG. 1. 図３の要部拡大図である。It is a principal part enlarged view of FIG. 従来の海流発電潜水船を示す全体斜視図である。It is a whole perspective view which shows the conventional ocean current power generation submersible.

符号の説明Explanation of symbols

２０ 構造体
２４、３２ 流入口
２５、３３ 流出口
２６ 据付枠
２７ バラストタンク
３０ 海流導管（第１の海流導管）
３１ 海流導管（第２の海流導管）
３１ａ 端部
３４ａ、３４ｂ 開閉弁（貯水手段）
３５ 軸流水車
３６ 発電機（発電装置）
４０ 海底 20 Structure 24, 32 Inlet 25, 33 Outlet 26 Installation frame 27 Ballast tank 30 Ocean current conduit (first ocean current conduit)
31 ocean current conduit (second ocean current conduit)
31a End 34a, 34b On-off valve (water storage means)
35 Axial water turbine 36 Generator (power generator)
40 Seabed

Claims (3)

曳航可能な浮力を有する構造体に、両端に海流の流入口と流出口が形成された筒状の第１の海流導管と、この第１の海流導管内に設けられ、両端に形成された海流の流入口および流出口がそれぞれ上記第１の海流導管の内部に位置する筒状の第２の海流導管と、この第２の海流導管内に回転自在に設けられ、上記海流によって回転する翼体と、この翼体の回転によって発電する発電装置とを備えた海流発電装置が組み込まれるとともに、上記構造体には、当該構造体を海底に着底させるに十分な容量の海水を貯水可能なバラストタンクと、このバラストタンクに上記海水を流入させる貯水手段とが設けられていることを特徴とする海底設置型海流発電設備。 A torsionally buoyant structure having a cylindrical first ocean current conduit having ocean current inlets and outlets formed at both ends, and a ocean current formed at both ends of the first ocean current conduit. And a wing body that is rotatably provided in the second ocean current conduit and is rotated by the ocean current. And an ocean current power generation device including a power generation device that generates electric power by rotation of the wing body, and the structure has a ballast capable of storing a sufficient amount of seawater to land the structure on the seabed. tank and submarine stationary ocean current power generation equipment characterized that you have a water storage means for flowing the seawater are provided in the ballast tank. 上記第１の海流導管および／または第２の海流導管は、少なくともその両端部が上記流入口または流出口に向けて漸次内法寸法が大きくなるテーパー状に形成されていることを特徴とする請求項１に記載の海底設置型海流発電設備。 The first ocean current conduit and / or the second ocean current conduit are formed in a tapered shape in which at least both ends thereof gradually increase in internal dimension toward the inlet or the outlet. Item 1. Submarine installation type ocean current power generation equipment according to item 1. 上記構造体には、複数基の上記海流発電装置が並列的に組み込まれていることを特徴とする請求項１または２に記載の海底設置型海流発電設備。 The submarine installation type ocean current power generation facility according to claim 1 or 2 , wherein a plurality of the ocean current power generation devices are incorporated in the structure in parallel .
JP2005193593A 2005-07-01 2005-07-01 Submarine type ocean current power generation equipment Expired - Fee Related JP4595715B2 (en)

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JP2008513650A (en) * 2004-09-17 2008-05-01 クリーン カーレント パワー システムズ インコーポレイテッド Increased flow for underwater turbine generators.

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JP2015075090A (en) * 2013-10-04 2015-04-20 谷電機工業株式会社 Power generator

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