著者

大川 豊 矢後 清和 太田 真 山田 義則 高野 宰 関田 欣治

出版者

Japan Society of Civil Engineers

雑誌

海洋開発論文集 (ISSN:09127348)

巻号頁・発行日

vol.20, pp.1217-1222, 2004 (Released:2011-06-27)

参考文献数

10

被引用文献数

1 1

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This paper describes the technical feasibility study and the economical evaluation of the floating wind power system. The box-girder type floating structure installed three wind turbines is proposed as a concept. The 5MW class propeller type turbines are adopted. The box girder with simple structures is favorable in the cost performance. Moreover, the wave induced motion and the righting moment can be optimized easily. The estimations of the static inclination and the wave induced motion were carried out in technical study. The relations between wind loads and motions or inclinations were investigated by the wind tunnel test. On the numerical analysis of motions, the fluid dynamic forces were calculated using the potential theory with zero draft assumption in the estimation of motion. The floating structure model was consisted by beam elements of FEM. The calculation result showed that the motion and the inclination in an operation condition are less than 5 degrees. According to the economic estimation, it was presumed that the proposed concept can be attained to the equally cost of water-power generation and others.

著者

金綱 正夫 関本 恒浩 関田 欣治 島田 潔

出版者

The Japan Society of Naval Architects and Ocean Engineers

雑誌

日本造船学会論文集 (ISSN:05148499)

巻号頁・発行日

vol.1994, no.175, pp.227-239, 1994 (Released:2009-01-08)

参考文献数

18

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This paper deals with the measured data obtained through the at-sea measurement of the TLP “EHIME”, an offshore nursery pilot firm station of Marino-Forum 21, of which tendons are parallel wire strands (PWS) protected by polyethylen sheath with specially manufactured cushion rubber rings at each ends and connected to a gravity type template through a belimouth shape structure. The measured data of the TLP dynamic responses are compared with theoretical estimation, and the strength performance of PWS as TLP tendons are discussed.The main results are as follows; 1) the TLP with the PWS mooring system has the same dynamic response characteristics as the conventional TLP with the steel pipe mooring system, 2) the mooring system by use of PWS type tendons adopted for the TLP “EHIME” exhibits sufficient strength and durability characteristics.

著者

鳥井 正志 関田 欣治 関 和市

出版者

東海大学

雑誌

東海大学紀要. 海洋学部 (ISSN:13487620)

巻号頁・発行日

vol.6, pp.1-10, 2008-03-31

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海流・潮流は、地球全海域に広く賦存しているが、その平均的エネルギー密度は風と同様に低い。しかし、海流は恒常性が高く、潮流は規則性があり、また流れの集中する海域では高いエネルギー密度を持つ。地球温暖化ガスの排出削減と、化石燃料からのエネルギー源の転換は、現在人類共通の課題である。このため、日本の排他的経済水域(EEZ)内の海洋資源の利活用として、海流・潮流エネルギーの回収の実用化を図る。本研究は、まず日本のEEZ内の海流・潮流エネルギー賦存量を明らかにする。つぎに、水流エネルギーの変換装置として直線翼垂直軸型タービンを選択し、海洋環境である水流や波浪中で使用するための課題を解決して適用可能性について検討する。そのうえで、この水流タービンを用いてEEZから回収可能なエネルギー量を試算する。

著者

鳥井 正志 関田 欣治 関 和市

出版者

東海大学海洋学部

雑誌

東海大学紀要. 海洋学部 (ISSN:13487620)

巻号頁・発行日

vol.6, no.1, pp.1-10, 2008-03-31

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Even the sea and tidal current are widely distributed whole through the ocean, the density of their energy are relatively low same as the wind one.However, the flow of the sea current is steady,the flow of the tidal current is cyclic and the density of energy increases in the water where the fluid concentrated. Since the reduction of the global warming gas and the switching of energy resource from the fossil fuel to renewable energy are the common issue of the human beings at present, this paper focused to realize the recovery of the sea and tidal current energy as a utilization of the renewable energy in the Japan's Exclusive Economic Zone (EEZ). The first,the quantity of current energy passing through the Japan's EEZ is shown.Then, the Straight-Wing Vertical-Axis Turbine (SWVAT), which has a lot of truck record as wind turbine, is adopted as the hydro turbine to recover the energy from the current, and its applicability to the water flow with wave as a natural sea condition is studied. Finally, the recoverable amount of the current energy by using the SWVAT is calculated.海流・潮流は,地球全海域に広く賦存しているが, その平均的エネルギー密度は風と同様に低い.しかし, 海流は恒常性が高く, 潮流は規則性があり, また流れの集中する海域では高いエネルギー密度を持つ.地球温暖化ガスの排出削減と, 化石燃料からのエネルギー源の転換は, 現在人類共通の課題である.このため, 日本の排他的経済水域 (EEZ)内の海洋資源の利活用として, 海流・潮流エネルギーの回収の実用化を図る.本研究は, まず日本のEEZ 内の海流・潮流エネルギー賦存量を明らかにする.つぎに, 水流エネルギーの変換装置として直線翼垂直軸型タービンを選択し, 海洋環境である水流や波浪中で使用するための課題を解決して適用可能性について検討する.そのうえで, この水流タービンを用いてEEZ から回収可能なエネルギー量を試算する.