KR20000027657A - Tidal generator - Google Patents
Tidal generator Download PDFInfo
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- KR20000027657A KR20000027657A KR1019980045617A KR19980045617A KR20000027657A KR 20000027657 A KR20000027657 A KR 20000027657A KR 1019980045617 A KR1019980045617 A KR 1019980045617A KR 19980045617 A KR19980045617 A KR 19980045617A KR 20000027657 A KR20000027657 A KR 20000027657A
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- South Korea
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- waterway
- hoistway
- generator
- tide
- seawater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/26—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Oceanography (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
본 발명은 조력발전기에 관한 것으로, 밀물과 썰물시 바닷물이 흐르는 방향으로 평행한 두 개의 수로벽체를 설치하고, 상기 수로벽체의 전후단부에 양측으로 벌어져 바닷물을 수로벽체내로 유입되도록 안내하는 조수안내벽부를 설치하고, 상기 수로벽체의 중심부에 중심부에 승하강로와 이 승하강로의 양측에 세로로 절결된 축안내홈을 구비한 수직보를 구비하고, 상기 수직보의 승하강로 내에 설치되어 부력에 의해 바닷물의 수위에 따라 승하강로내에서 승하강되고 내부에 공지의 발전장치가 내장된 부력체와, 상기 부력체의 양측에 발전기를 연동시키는 수차축에 바닷물의 유속에 의해 회전되어 발전기를 가동시키는 수차가, 구비되어 구성된 것으로, 이러한 구조에 의해 밀물 및 썰물시 빠른속도로 흐르는 바닷물을 이용하여 발전기의 수차를 돌려 발전을 하도록 되어 있으므로 적은 비용으로 엄청난 양의 전기를 반영구적으로 생산할 수 있는 경제적인 조력발전기이다.The present invention relates to an tidal power generator, and installs two waterway walls parallel to the direction of flowing seawater at high tide and low tide, the tide guide wall for guiding the sea water to flow into both sides at the front and rear ends of the waterway wall. And a vertical beam having a hoistway in the center at the center of the waterway wall and a shaft guide groove vertically cut on both sides of the hoistway, and installed in the hoistway of the vertical beam for buoyancy. As a result of the sea level, the buoyancy body is moved up and down in the hoistway, and there is a known power generation device built therein, and the axle shaft which interlocks the generator to both sides of the buoyancy body is rotated by the flow rate of seawater to operate the generator. The aberration to be provided, which is provided, and the aberration of the generator by using the seawater flowing at high speed during high and low tide by this structure It is to the development of the economic tidal generators can produce large amounts of electricity with less permanently.
Description
본 발명은 발전기에 관한 것으로, 특히 밀물과 썰물에 의해 빠른 속도로 흐르는 바닷물의 유속을 이용하여 발전을 할 수 있도륵 한 조력발전기에 관한 것이다.The present invention relates to a generator, and more particularly, to an tidal generator capable of generating power using the flow rate of the sea water flowing at high speed by the high and low tide.
종래의 조력 발전기는 바다에 뚝을 쌓아 밀물시 바닷물을 가두어 두었다가 물이 빠진 후에 가두어 두었던 바닷물을 방출시키면서 발전을 하는 구조로 되어 있었으며, 바닷물이 출렁이는 파도를 이용하여 발전을 할 수 있도록 한 것도 있다.Conventional tidal power generators were built in the sea to trap the seawater at high tide and discharge the seawater that was trapped after the water was drained to generate power, and the seawater was able to generate power using the rippled waves have.
그러나 이러한 종래의 조력발전기는 밀물시에는 발전을 할 수 없고 썰물에 의해 바닷물이 다 빠진 후에 발전을 할 수밖에 없으므로 발전용량에 한계가 있고, 또 파도를 이용한 발전 또한 발전용량이 작아 항상 화력발전이나 원자력발전에 보조적으로 전력을 공급하는 보조발전수단으로만 사용하게 되는 것이다.However, these conventional tidal power generators cannot generate power at high tide, and can only generate power after the tidal water runs out due to the low tide.Therefore, there is a limit in the power generation capacity. It will be used only as a secondary power generation means to supply power auxiliary power generation.
따라서 본 발명은 이러한 종래의 조력발전의 단점을 보완한 새로운 개념의 발전기로서, 밀물과 썰물시 바닷물이 유입되고 빠질 때 비교적 빠른 속도로 유동하는 바닷물의 유속을 이용하여 수차를 돌려 발전기를 가동하여 발전을 하도록 한 조력발전기를 제공하는데 그 목적이 있다.Therefore, the present invention is a generator of a new concept that complements the disadvantages of the conventional tidal power generation, power generation by operating a generator by turning the aberration using the flow rate of the sea water flowing at a relatively high speed when the water flows in and out when the tide and low tide Its purpose is to provide a tidal generator for the purpose.
도 1은 본 발명의 구조를 나타낸 분리 사시도,1 is an exploded perspective view showing a structure of the present invention,
도 2는 본 발명의 구조를 나타낸 사시도,2 is a perspective view showing the structure of the present invention;
도 3은 본 발명의 평도,3 is a flat view of the present invention,
도 4는 본 발명의 종단면도이다.4 is a longitudinal cross-sectional view of the present invention.
*** 도면의 주요 부분에 대한 부호의 설명 ****** Explanation of symbols for the main parts of the drawing ***
1, 2 - 수로벽체 3 - 조수안내벽부 4 - 수직보1, 2-Waterway wall 3-Tide guide wall 4-Vertical beam
5 - 승하강로 6 - 축안내홈 7 - 개폐판5-Lift 6-Axis guide groove 7-Opening and closing board
8 - 부력체 9 - 수차 10 - 수차축8-buoyant body 9-aberration 10-aberration shaft
11 - 전선 12 - 걸름망 13 - 크레인11-wires 12-strainers 13-cranes
이하, 본 발명의 실시예를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명의 구조를 나타낸 분리 사시도이고, 도 2는 본 발명의 구조를 나타낸 사시도이고, 도 3은 본 발명의 평도이며, 도 4는 본 발명의 종단면도이다.1 is an exploded perspective view showing the structure of the present invention, Figure 2 is a perspective view showing the structure of the present invention, Figure 3 is a plan view of the present invention, Figure 4 is a longitudinal sectional view of the present invention.
도시된 바와 같이 본 발명의 조력발전기는 일정한 간격으로 평행하게 설치된 수로벽체(1)(2)와, 이 두 수로벽체(1) (2) 사이에 설치된 수직보(4)와, 수직보(4)의 내부에 설치되어 바닷물의 수위에 따라 승하강되는 부력체(8)로 구성되어 있다.As shown, the tidal generator of the present invention is a waterway wall (1) (2) installed in parallel at regular intervals, a vertical beam (4) provided between the two waterway walls (1) (2), a vertical beam (4) It is composed of a buoyancy body (8) which is installed inside the) and descends in accordance with the water level.
상기 수로벽체(1)(2)는 일정한 간격으로 평행하게 설치된 것으로 밀물과 썰물시 바닷물이 흐르는 방향으로 설치되는데, 조수간만의 차가 심한 바다에 설치되는 것이 바람직하다. 그리고 수로벽체(1)(2)의 설치위치는 썰물이 되어 바닷물이 최대한 밀려간 상태에서 부력체(8)가 떠있을 수 있을 정도의 수심에 설치되며, 수로벽체(1)(2)의 높이는 밀물시 유입된 바닷물의 만수위 보다 약간 높도록 형성되어있다.The waterway walls (1) and (2) are installed in parallel at regular intervals and are installed in the direction of flowing water at high and low tide. And the installation position of the waterway walls (1) and (2) becomes a low tide and is installed at the depth enough that the buoyancy body (8) can be floating in the state where the seawater is pushed as far as possible, and the height of the waterway walls (1) (2) is It is formed to be slightly higher than the full water level of the inflowing seawater.
또한 수로벽체(1)(2)의 전후부에는 조수안내벽부(3)가 설치되어 있는데, 이 조수안내벽부(3)는 바닷물이 최대한 수로벽체(1)(2)의 내부로 유입될 수 있도록 양측으로 벌어져 바닷물을 안내하도록 되어 있다. 그리고 수로벽체(1) (2)의 전후부에는 양측 조수안내벽부(3)를 연결하는 걸름망(12)이 설치되어 유입되는 바닷물에 섞여 있는 이물질이나 오물이 조력발전기의 내에 유입되지는 것을 방지 하였다.In addition, the tide guide wall portion (3) is provided on the front and rear portions of the waterway wall (1) (2), the tidal guide wall portion (3) so that the sea water can be introduced into the waterway wall (1) (2) to the maximum. It opens on both sides to guide the seawater. In addition, the front and rear portions of the waterway walls (1) and (2) are provided with a strainer (12) connecting both side guide walls (3) to prevent foreign substances or dirt mixed in the incoming seawater from entering the tidal generator. .
상기 수직보(4)는 중심부에 직사각의 수직터널과 같은 구조로되어 부력체(8)를 수직으로 안내하는 승하강로(5)가 구비되어 있고, 이 승하강로(5)의 중앙부 양측에는 세로로 절결되어 후술될 발전장치의 수차축(10)을 승하강시키는 축안내홈(6)이 절결 형성되어 있다. 수로벽체(1)(2)의 일측 측부 상단부는 부력체(8)의 발전장치, 수차(9) 등의 고장시 수직보(4)의 측부로 이동시켜 수로벽체(1)(2)의 전후로 분리가 용이하도륵 개폐가능한 분리판(7)이 설치되어 있다.The vertical beams (4) has a structure such as a vertical vertical tunnel in the center is provided with a hoistway (5) for guiding the buoyancy body (8) vertically, on both sides of the center of the hoistway (5) The shaft guide groove 6 for vertically cutting and raising and lowering the aberration shaft 10 of the power generating apparatus to be described later is cut out. The upper end of one side of the waterway walls 1 and 2 is moved to the side of the vertical beam 4 in the event of a failure of the power generating device of the buoyancy body 8, the aberration 9, and the like before and after the waterway walls 1 and 2. A separator plate 7 that can be opened and closed for ease of separation is provided.
또한 부력체(8)는 내부에 도면에 도시되지 않은 발전장치를 내장하고 있고 양측에는 수차축(10)이 설치되어 이에 수차(9)가 설치되며, 수차(9)는 수차축(10)에 의해 발전장치를 연동시키도록 되어 있다. 이러한 부력체(8)는 수직보(4)의 승하강로(5) 내에 설치되어 바닷물의 수위에 따라 승하강로(5)내에서 승하강되고 양측에 설치된 수차(9)는 하부가 항상 바닷물에 잠겨 바닷물의 유속에 의해 회전되도록 되어 있다.In addition, the buoyancy body 8 has a built-in power generator not shown in the drawing and the aberration shaft 10 is installed on both sides thereof, the aberration 9 is installed therein, the aberration 9 is arranged on the aberration shaft 10. By interlocking the power generation device. This buoyancy body (8) is installed in the hoistway (5) of the vertical beams (4) is raised and lowered in the hoistway (5) in accordance with the water level of the water and the aberrations (9) installed on both sides of the bottom is always the seawater It is immersed in water and rotated by the flow rate of sea water.
이러한 구조로 되어 있는 본 발명의 작용을 살펴보면 다음과 같다.Looking at the operation of the present invention having such a structure as follows.
밀물이 시작되면 바닷물의 수위가 높아지면서 조류를 따라서 바닷물이 이동하게 된다. 이때 수로벽체(1)(2)의 선단부에 설치된 조수안내벽부(3)가 바닷물을 안내하여 수로벽체(1)(2)의 내부로 흐르게 한다. 수로벽체(1)(2)로 통과하는 물은 상당한 유속으로 흐르기 때문에 부력체(8)에 설치된 수차(9)가 빠른 속도로 회전하게 되고 수차축(10)에 의해 발전장치가 가동되어 발전을 하게 된다. 또한 밀물이 진행되면서 바닷물의 수위가 높아지게 되는데, 이때에는 부력체(8)가 부력에 의해 승하강로(5)를 따라 승강하여 항상 수차(9)의 하부가 바닷물에 잠겨있는 상태를 유지하기 때문에 수위의 높낮이에는 전혀 지장없이 원활하게 회전하게 된다. 그리고 수직승하강하는 부력체(8)의 수차축(10)은 수직보(4)의 양측면에 절결 형성된 축안내홈(6)에 안내되어 승하강하게 된다.When the tide begins, the sea level rises and the tide moves along the algae. At this time, the tidal guide wall 3 installed at the distal end of the waterway walls 1 and 2 guides the seawater to flow into the waterway walls 1 and 2. Since water passing through the waterway walls 1 and 2 flows at a considerable flow rate, the aberration 9 installed in the buoyancy body 8 rotates at a high speed, and the power generation device is operated by the aberration shaft 10 to generate power. Done. In addition, as the tide progresses, the water level is increased. At this time, the buoyancy body 8 is moved up and down along the elevating path 5 by buoyancy so that the lower part of the aberration 9 remains submerged in the seawater. The height of the water level rotates smoothly without any problems. And the aberration shaft 10 of the buoyancy body (8) to move up and down is guided by the shaft guide groove (6) formed on both sides of the vertical beam (4) is raised and lowered.
한편, 썰물시에도 조류를 따라서 빠져나가는 물이 수로벽체(1) (2)의 사이를 통과하게되며 후측의 조수안내벽부(3)가 바닷물을 수로벽체(1)(2)내로 안내하여 수로벽체(1)(2)를 통과하는 물은 여전히 빠른 유속으로 통과하게 된다. 따라서 수차(9) 또한 빠른 속도로 회전하게 되며 수차축(10)과 연결된 발전장치는 발전을 하게된다. 썰물시에는 수위가 낮아지기 때문에 부력체(8)는 수위에 따라 하강하게 되지만 수차(9)는 여전히 적당한 만큼만 물에 잠겨있기 때문에 원활하게 회전을 하기때문에 발전장치는 원활하게 작동하여 일정한 발전량을 지속적으로 유지하게 된다.On the other hand, the water flowing out along the algae at the time of low tide passes between the waterway walls (1) and (2), and the tidal guide wall portion (3) on the rear side guides the seawater into the waterway walls (1) and (2). Water passing through (1) (2) still passes at a high flow rate. Therefore, the aberration 9 also rotates at a high speed, and the power generation device connected to the aberration shaft 10 generates power. At low tide, the water level is lowered, so the buoyancy body (8) is lowered according to the water level, but the aberration (9) is still soaked in water, so the generator rotates smoothly, so the generator works smoothly and continuously generates a certain amount of power Will be maintained.
이때, 밀물 및 썰물시 수로벽체(1)(2)내로 유입되는 바닷물은 먼저 걸름망(12)을 거치게 되므로 바닷물과 함께 유동되는 이물질 및 오물이 걸러지게 됨으로 이물질 및 오물로인한 조력발전기의 고장을 최소화해준다. 그리고 부력체(8)가 바닷물의 수위에 의해 승하강작동하면서 발전된 전기는 코일형태로 된 케이블(11)을 타고 외부로 송전된다.At this time, the seawater flowing into the waterway walls (1) and (2) at the time of high tide and low tide passes through the strainer (12) first, so that foreign matter and dirt flowing along with the sea water are filtered out, thereby minimizing the breakdown of the tidal generator caused by the foreign matter and dirt. Do it. The electricity generated while the buoyancy body 8 moves up and down by the water level is transmitted to the outside by the cable 11 in the form of a coil.
또한 수직보(4)의 승하강로(5)에 설치된 부력체(8) 및 그 내부에 내장된 발전장치가 고장일 경우에는 만수위때 부력체(8)가 수직보(4)의 최상부에 위치할 때 수직보(4)의 일측면 상단에 설치된 분리판(7)을 분리하여 부력체(8)를 측부로 이동시킨 후 수로벽체(1)(2)의 전후로 이동시키면 쉽고 간편하게 수로벽체(1)(2)로부터 분리시킬 수가 있으며, 이로써 고장수리를 쉽고 용이하게 수행 할 수 있다.In addition, when the buoyancy body 8 installed on the lifting ramp 5 of the vertical beam 4 and the power generator built therein is broken, the buoyancy body 8 is located at the top of the vertical beam 4 at the full water level. When separating the separation plate 7 installed on one side top of the vertical beam (4) to move the buoyancy body 8 to the side and then move forward and backward of the waterway wall (1) (2) easily and simply the waterway wall (1) It can be separated from (2), which makes troubleshooting easy and easy.
한편, 도 4와 같이 수로벽체(1)(2)의 중앙부 상부에 크레인(13)을 설치하면 부력체(8)의 고장시 부력체(8)를 쉽게 들어올려 수리할 수 있고, 기타 다른 부분의 고장시에도 용이하게 수리를 할 수 있다.On the other hand, if the crane 13 is installed on the upper portion of the central portion of the waterway wall (1) (2), as shown in Figure 4 can easily lift and repair the buoyancy body (8) in case of failure of the buoyancy body (8) It can be easily repaired in case of malfunction.
이러한 구조의 조력발전기를 바다에 다수개 설치해두게 되면 엄청난 양의 전기를 발전할 수 있다. 그리고 강의 본댐의 하류에 보조댐을 설치하여 본 발명의 조력 발전기에서 발전된 전기를 이용하여 본댐에서 방류된 물을 다시 본댐으로 퍼올려 소모된 수량을 보충하므로써 강우량에 영향을 받지않고 전력을 생산할 수 있다.If a large number of tidal generators of this structure are installed in the sea, a huge amount of electricity can be generated. In addition, by installing an auxiliary dam downstream of the main dam of the river, by using the electricity generated by the tidal power generator of the present invention, the water discharged from the main dam is pumped back to the main dam to replenish the consumed water, thereby generating power without being affected by rainfall.
이상에서 살펴본 바와 같이 본 발명은 밀물 및 썰물시 빠른속도로 흐르는 바닷물을 이용하여 발전장치의 수차를 빠른 속도로 돌려 발전을 하도록 되어 있으므로 적은 비용으로 엄청난 양의 전기를 반영구적으로 생산할 수 있는 경제적인 조력발전기 이다.As described above, the present invention is to generate power by turning the aberration of the power generation device at a high speed by using the seawater flowing at a high speed during high tide and low tide economical help to produce a huge amount of electricity semi-permanently at a low cost It is a generator.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980045617A KR20000027657A (en) | 1998-10-29 | 1998-10-29 | Tidal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980045617A KR20000027657A (en) | 1998-10-29 | 1998-10-29 | Tidal generator |
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| Publication Number | Publication Date |
|---|---|
| KR20000027657A true KR20000027657A (en) | 2000-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019980045617A Ceased KR20000027657A (en) | 1998-10-29 | 1998-10-29 | Tidal generator |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008063008A1 (en) * | 2006-11-22 | 2008-05-29 | Sam-An Corporation | Turbine structure and gate structure having flexible joint and inside stuffing for tidal power plant |
| KR100911414B1 (en) * | 2008-06-05 | 2009-08-11 | 김영기 | Tidal power device |
| KR101055538B1 (en) * | 2008-12-01 | 2011-08-08 | 남정훈 | Precast Wall Power Generation Structure for Increasing Flow Rate |
| WO2012030074A3 (en) * | 2010-08-30 | 2012-05-10 | Chung Kwang-Ok | Structure to generate hydroelectric power |
| WO2012102518A3 (en) * | 2011-01-24 | 2012-10-11 | Choi Young Sik | Environment-friendly waterwheel type water power generation apparatus and environment-friendly waterwheel type tidal power generation apparatus capable of bidirectional power generation |
| KR101235430B1 (en) * | 2011-01-24 | 2013-02-20 | 최영식 | Environment-friendly hydro-electric power generating set having spinning wheel types |
| WO2015080451A1 (en) * | 2013-11-27 | 2015-06-04 | 이재혁 | Tidal current power generation structure |
| KR20220165966A (en) | 2021-06-09 | 2022-12-16 | 이상훈 | An online commercial dealing system that is enable for live commerce for traditional markets |
-
1998
- 1998-10-29 KR KR1019980045617A patent/KR20000027657A/en not_active Ceased
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008063008A1 (en) * | 2006-11-22 | 2008-05-29 | Sam-An Corporation | Turbine structure and gate structure having flexible joint and inside stuffing for tidal power plant |
| JP2010501749A (en) * | 2006-11-22 | 2010-01-21 | サム−アン コーポレーション | Water turbine structure and sluice structure for tidal power plant with expansion joint and internal filling |
| KR100911414B1 (en) * | 2008-06-05 | 2009-08-11 | 김영기 | Tidal power device |
| KR101055538B1 (en) * | 2008-12-01 | 2011-08-08 | 남정훈 | Precast Wall Power Generation Structure for Increasing Flow Rate |
| WO2012030074A3 (en) * | 2010-08-30 | 2012-05-10 | Chung Kwang-Ok | Structure to generate hydroelectric power |
| WO2012102518A3 (en) * | 2011-01-24 | 2012-10-11 | Choi Young Sik | Environment-friendly waterwheel type water power generation apparatus and environment-friendly waterwheel type tidal power generation apparatus capable of bidirectional power generation |
| KR101235430B1 (en) * | 2011-01-24 | 2013-02-20 | 최영식 | Environment-friendly hydro-electric power generating set having spinning wheel types |
| WO2015080451A1 (en) * | 2013-11-27 | 2015-06-04 | 이재혁 | Tidal current power generation structure |
| KR20220165966A (en) | 2021-06-09 | 2022-12-16 | 이상훈 | An online commercial dealing system that is enable for live commerce for traditional markets |
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