JP6317881B2 - 海洋熱エネルギー変換発電所 - Google Patents
海洋熱エネルギー変換発電所 Download PDFInfo
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Classifications
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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
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
- F03G7/05—Ocean thermal energy conversion, i.e. OTEC
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/14—Laying or reclaiming pipes on or under water between the surface and the bottom
- F16L1/15—Laying or reclaiming pipes on or under water between the surface and the bottom vertically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/22—Pipes composed of a plurality of segments
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/106—Ammonia
-
- 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
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Oceanography (AREA)
- Sustainable Development (AREA)
- Biodiversity & Conservation Biology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Description
本願は、米国仮特許出願第61/297,242号(2010年1月21日出願)、米国特許出願第12/691,655号(2010年1月21日出願)、米国特許出願第12/691,663号(2010年1月21日出願)の優先権を主張する。
本発明は、海洋熱エネルギー変換発電所に関し、より具体的には、浮遊している最小上下動プラットフォームの多段熱エンジン海洋熱エネルギー変換発電所に関する。
例えば、本願明細書は、以下の項目も提供する。
(項目1)
水中垂直パイプを浮遊構造に接続する方法であって、該方法は、
吊上げおよび保持ケーブルを冷水パイプの上側部分に接続することであって、該冷水パイプの上側部分は、先細接続面を有する吊上げカラーを含む、ことと、
該吊上げおよび保持ケーブルを使用して、スパー受容ベイの中に該冷水パイプを引くことであって、該受容ベイは、該冷水パイプの上側部分を受容するための先細表面と、接触パッドとを含む、ことと、
該冷水パイプの先細接続面を、該受容ベイの該接触パッドと密閉可能に接触させることと、
該吊上げケーブルを機械的に固定することであって、それにより、該接続面と該接触パッドとの間の該密閉可能な接触を維持する、ことと
を含む、方法。
(項目2)
水中パイプ接続アセンブリであって、該アセンブリは、
接続構造であって、吊上げデバイス、吊上げケーブル、第1の先細接続面、および接触パッドを有する下側部分を含む接続構造と、
垂直パイプであって、
第2の先細接続面および吊上げアイを有する吊上げカラーを含む第1の縦部分と、
該第1の部分の下方の第2の縦部分であって、該第1の部分よりも可撓性である第2の縦部分と
を含む、垂直パイプと
を含む、アセンブリ。
(項目3)
前記第2の縦部分の下方の第3の縦部分をさらに備え、該第3の部分は、該第2の部分よりも可撓性ではない、項目2に記載の水中パイプ接続アセンブリ。
(項目4)
前記第2の先細接続面は、防水シールを形成するように前記第1の先細接続面の前記接触パッドと接触している、項目2に記載の水中パイプ接続アセンブリ。
(項目5)
前記アセンブリは、OTECシステムの一部である、項目2に記載の水中パイプ接続アセンブリ。
(項目6)
水中垂直パイプ接続であって、該接続は、
垂直パイプ受容ベイを有する浮遊構造であって、該受容ベイは、第1の直径を有する、浮遊構造と、
該パイプ受容ベイの中に挿入するための垂直パイプであって、該垂直パイプは、該パイプ受容ベイの該第1の直径よりも小さい第2の直径を有する、垂直パイプと、
ベアリング面と、
該ベアリング面とともに動作可能な1つ以上の移動止めであって、該移動止めは、該ベアリング面と接触しているときに、該第1または第2の直径とは異なる直径を画定する、移動止めと
を含む、接続。
(項目7)
水中垂直パイプを浮遊プラットフォームに接続する方法であって、該方法は、
垂直パイプ受容ベイを有する浮遊構造を提供することであって、該パイプ受容ベイは、第1の直径を有する、ことと、
最上端部分を有する垂直パイプを提供することであって、該最上端部分は、該第1の直径よりも小さい第2の直径を有する、ことと、
該垂直パイプの該最上端部分を該受容ベイの中に挿入することと、
該垂直パイプを支持するためのベアリング面を提供することと、
1つ以上の移動止めを拡張することであって、それにより、1つ以上の移動止めが該第1または第2の直径とは異なる直径を有する、ことと、
該1つ以上の移動止めを該ベアリング面と接触させることであって、それにより、該浮遊構造から該垂直パイプを吊るす、ことと
を含む、方法。
(項目8)
水中部分を含むオフショア発電構造であって、該水中部分は、
温水導管と一体である4段蒸発器部分と、
冷水導管と一体である4段凝縮器部分と、
発電部分と、
冷水パイプ接続と、
冷水パイプと
をさらに含む、構造。
(項目9)
前記4段蒸発器部分は、温水導管を含み、
該温水導管は、
第1、第2、第3、および第4の作動流体と協働している第1段熱交換表面、第2段熱交換表面、第3段熱交換表面、および第4段熱交換表面を含み、作動は、該第1、第2、第3、および第4段熱交換表面の各々において蒸気にまで加熱される、項目8に記載のオフショア発電構造。
(項目10)
前記温水導管は、前記水中部分の構造部材を含む、項目9に記載のオフショア発電構造。
(項目11)
前記第1および第4の作動流体は、第1のタービン発電機と連通しており、前記第2および第3の作動流体は、第2のタービン発電機と連通している、項目9に記載のオフショア発電構造。
(項目12)
オフショア発電構造が提供され、該オフショア発電構造は、
水中部分を含み、該水中部分はさらに、
一体多段蒸発器システムを含む第1のデッキ部分であって、
高容量温水導管を形成する第1の温水構造通路と、
蒸気まで作動流体を加温するように該第1段温水構造通路と協働して配列される第1段作動流体通路と、
第2段温水構造通路に直接連結される第1段温水排出口であって、該第2段温水構造通路は、高容量温水導管を形成し、および
該第1段温水排出口に連結される第2段温水取水口と、
蒸気まで第2の作動流体を加温するように、該第2段温水構造通路と協働して配列される第2段作動流体通路と、
第2段温水排出口と
を含む、第1のデッキ部分と、
一体多段凝集システムを含む第2のデッキ部分であって、
高容量温水導管を形成する第1段冷水構造通路を含み、該第1段冷水通路はさらに、
第1段冷水取水口と、
該第1のデッキ部分の該第1段作動流体通路と連通している第1段作動流体通路で
あって、該第1段冷水構造通路と協働している該第2のデッキ部分の該作動流体通路は、液体まで該作動流体を冷却する、第1段作動流体通路と、
高容量温水導管を形成する第2段冷水構造通路に直接連結される第1段冷水排出口であって、該高容量温水導管は、
第2段冷水取水口を含み、該第1段冷水排出口および該第2段冷水取水口は、該第1段冷水排出口から該第2段冷水取水口への冷水流の最小圧力損失を提供するように配設される、第1段冷水排出口と、
該第1のデッキ部分の第2段作動流体通路と連通している第2段作動流体通路であって、該第2段冷水構造通路と協働している該第2段作動流体通路は、液体まで該2段作動流体通路内の害作動流体を冷却する、第2段作動流体通路と、
第2段冷水排出と
を含む、第2のデッキ部分と、
発電機器を収納する第3のデッキ部分であって、
第1および第2の蒸気タービンであって、該第1のデッキ部分の該第1段作動流体通路は、該第1のタービンと連通しており、該第1のデッキ部分の該第2段作動流体通路は、該第2のタービンと連通している、蒸気タービンと
を含む、第3のデッキ部分と
を含む。
(項目13)
外面、最上端、および底端を有する細長い管状構造を含み、該管状構造は、
複数の第1および第2のおけ板セグメントを含み、各おけ板セグメントは、最上部分および底部分を有し、該第2のおけ板セグメントの該最上部分は、該第1のおけ板セグメントの該最上部分からオフセットされている、パイプ。
(項目14)
各おけ板セグメントは、ポリ塩化ビニル(PVC)、塩素化ポリ塩化ビニル(CPVC)、繊維強化プラスチック(FRP)、強化ポリマーモルタル(RPMP)、ポリプロピレン(PP)、ポリエチレン(PE)、架橋高密度ポリエチレン(PEX)、ポリブチレン(PB)、アクリロニトリルブタジエンスチレン(ABS)、ポリエステル、繊維強化ポリエステル、ナイロン強化ポリエステル、ビニルエステル、繊維強化ビニルエステル、ナイロン強化ビニルエステル、コンクリート、セラミック、またはそれらのうちの1つ以上の複合材料を含む、項目13に記載のパイプ。
(項目15)
OTEC発電所において使用するための冷水パイプを形成する方法であって、該方法は、
複数の第1および第2のおけ板セグメントを形成することと、
交互の第1と第2のおけ板セグメントとを接着結合することであって、それにより、該第2のおけ板セグメントが該第1のおけ板セグメントからオフセットされて、連続的な細長い管を形成する、ことと
を含む、方法。
上記で説明されるように、OTEC運用は、一定の温度の冷水源を必要とする。冷却水の変動は、OTEC発電所の全体的効率に多大に影響を及ぼし得る。そのようなものとして、約40°Fの水が、2700ftから4200ft以上の間の深さから引かれる。OTEC発電所による使用のために、この冷水を表面へ引くように、長い取水パイプが必要とされる。そのような冷水パイプは、好適な性能および耐久性のパイプを構築する費用により、商業的に実現可能なOTEC動作への障害であった。
約3000フィートの連続オフセットおけ板パイプの現場構築を促進する、冷水パイプアセンブリが提供される。加えて、おけ板設計は、区分化されたパイプ構造によって従来的に体験された、不利な配送および取扱の荷重に対処する。例えば、従来的に構築された区分化冷水パイプのけん引および逆転は、パイプに有害な荷重を課す。
冷水パイプ351とスパープラットフォーム311との間の接続は、構築、維持、および運用課題を提示する。例えば、冷水パイプは、動的海洋環境で吊るされた、2000ftから4000ftの垂直柱である。冷水パイプが接続するプラットフォームまたは船も、動的海洋環境で浮遊している。また、パイプは、理想的には水線より下側で、いくつかの側面では、水線よりはるかに下側かつ船の底の近くで接続される。完全に組み立てられたパイプを適正な位置へと操作し、パイプを船またはプラットフォームに固定することは、困難な作業である。
本発明の付加的な側面では、吊上げラグ1775は、既知の締結および接続技法を使用して冷水パイプの最上部に直接ボルト締めされる、パッドアイ(eye)を備えることができる。例えば、バレルソケット、六角ソケット、コドラーピン、および同等物を、冷水パイプのおけ板最上部分に組み込むことができる。
図3、3A、ならびに19および20は、複数の多段熱交換器420がOTECスパー410の周辺に配設される、本発明の実装を図示する。熱交換器420は、OTEC熱エンジンで使用される蒸発器または凝縮器となり得る。熱交換の周辺レイアウトは、OTECスパープラットフォームの蒸発器部分344または凝縮器部分348とともに利用することができる。周辺配設は、任意の数の熱交換器(例えば、1つの熱交換器、2個から8個の間の熱交換器、8〜16個の熱交換器、16〜32個の熱交換器、または32個以上の熱交換器)を支持することができる。1つ以上の熱交換器は、OTECスパー410の単一のデッキの上または複数のデッキの上(例えば、2、3、4、5、または6個上のデッキの上)で周辺に配設することができる。1つ以上の熱交換器は、2つの熱交換器が相互上で垂直に整合させられないように、2つ以上のデッキの間で周辺にオフセットすることができる。1つ以上の熱交換器は、1つのデッキの中の熱交換器が別の隣接デッキ上の熱交換器と垂直に整合させられるように、周辺に配設することができる。
本発明の側面は、熱帯および亜熱帯地方の水面水と深海洋水との間の温度差を使用して電気を産生する、統合多段OTEC発電所を提供する。側面は、導管または流路としてオフショア船またはプラットフォームの構造を使用することによって、海水用の従来の配管を排除する。代替として、温および冷海水配管は、垂直または他の構造支持を船またはプラットフォームに提供するのに十分なサイズおよび強度の導管またはパイプを使用することができる。これらの統合海水導管セクションまたは通路は、船の構造部材としての機能を果たし、それにより、付加的な鋼鉄の要求を低減する。統合海水通路の一部として、多段キャビネット熱交換器は、外部水ノズルまたは配管接続を必要とすることなく、作動流体蒸発の複数の段階を提供する。統合多段OTEC発電所は、温かい海水および冷たい海水が自然な方向に流れることを可能にする。温かい海水は、海洋のより冷たい区域の中へ放出される前に冷却されるため、船を通って下向きに流れる。同様に、海洋の深部からの冷たい海水は、海洋のより温かい区域の中へ放出される前に加温されるため、船を通って上向きに流れる。この配設は、海水流方向の変化の必要性および関連圧力損失を回避する。配設はまた、必要とされる送出エネルギーも低減する。
オフショアOTECスパープラットフォームは、4つの別個の電力モジュールを含み、それぞれが定格設計条件で約25MWの正味電力を産生する。各電力モジュールは、異なる圧力および温度レベルで動作し、4つの異なる段階で海水系から熱を取り入れる、4つの別個の電力サイクルまたは連鎖熱力学的段階を備える。4つの異なる段階は、連続して動作する。定格設計条件(全負荷・夏条件)での4つの段階のおよその圧力および温度レベルは、以下の通りである。
大孔配管: ガラス繊維強化プラスチック(FRP)
大型海水管路およびチャンバ: エポキシ被覆炭素鋼
大孔弁: ゴム裏地付きのバタフライ型
ポンプインペラ: 好適なブロンズ合金
となる。
Claims (12)
- 海洋熱エネルギー変換発電所であって、
該海洋熱エネルギー変換発電所は、
水中パイプ接続アセンブリを有する船であって、該アセンブリは、吊上げデバイス、吊上げケーブル、第1の先細接続面、および接触パッドを有する下側部分を含む接続構造を含む、船と、
冷水パイプであって、該冷水パイプは、
第2の先細接続面および吊上げアイを有する吊上げカラーを含む第1の縦部分と、
該第1の部分の下方の第2の縦部分であって、該第1の部分よりも可撓性がある第2の縦部分と、
該第2の縦部分の下方の第3の縦部分であって、該第2の部分よりも可撓性がない第3の縦部分と
を含む、冷水パイプと
を含み、該第2の先細接続面は、該冷水パイプの該第1の縦部分が該船に静的接続されるように該第1の先細接続面の該接触パッドと接触している、海洋熱エネルギー変換発電所。 - 前記第2の先細接続面と前記第1の先細接続面の前記接触パッドとの接触は、該第2の先細接続面と該第1の先細接続面の該接触パッドとの間に防水シールを形成する、請求項1に記載の海洋熱エネルギー変換発電所。
- 前記アセンブリは、OTECシステムの一部である、請求項1に記載の海洋熱エネルギー変換発電所。
- 前記冷水パイプの前記第1の縦部分の壁は、該冷水パイプの前記第2の縦部分の壁よりも厚い、請求項1に記載の海洋熱エネルギー変換発電所。
- 前記冷水パイプの前記第3の縦部分は、該冷水パイプの前記第2の縦部分よりも長い、請求項1に記載の海洋熱エネルギー変換発電所。
- 前記冷水パイプの前記第3の縦部分は、該冷水パイプの前記第2の縦部分から該冷水パイプの底まで延在する、請求項5に記載の海洋熱エネルギー変換発電所。
- 前記冷水パイプの前記第3の縦部分は、該冷水パイプの最大部分である、請求項1に記載の海洋熱エネルギー変換発電所。
- 前記第3の縦部分は、前記第1の縦部分よりも可撓性がある、請求項1に記載の海洋熱エネルギー変換発電所。
- 前記第3の縦部分は、前記冷水パイプの長さの50%以上を構成する、請求項1に記載の海洋熱エネルギー変換発電所。
- 前記第1の縦部分は、前記冷水パイプの長さの10%以下を構成する、請求項9に記載の海洋熱エネルギー変換発電所。
- 前記第2の縦部分は、前記冷水パイプの長さの1%〜30%を構成する、請求項10に記載の海洋熱エネルギー変換発電所。
- 前記第2の縦部分は、0.5度から30度までの前記冷水パイプの前記第3の縦部分の偏向を許容することができる、請求項11に記載の海洋熱エネルギー変換発電所。
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