JP7355461B2 - liquefied gas fueled ship - Google Patents

liquefied gas fueled ship Download PDF

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JP7355461B2
JP7355461B2 JP2021168565A JP2021168565A JP7355461B2 JP 7355461 B2 JP7355461 B2 JP 7355461B2 JP 2021168565 A JP2021168565 A JP 2021168565A JP 2021168565 A JP2021168565 A JP 2021168565A JP 7355461 B2 JP7355461 B2 JP 7355461B2
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liquefied gas
fuel tank
ship
gas fuel
tank
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JP2022001488A (en
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寿 芳賀
貴士 渡邉
宏始 鈴木
弘睦 船越
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Mitsui E&S Shipbuilding Co Ltd
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Mitsui E&S Shipbuilding Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • B63B17/0027—Tanks for fuel or the like ; Accessories therefor, e.g. tank filler caps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B11/00—Interior subdivision of hulls
    • B63B11/04—Constructional features of bunkers, e.g. structural fuel tanks, or ballast tanks, e.g. with elastic walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0221—Fuel storage reservoirs, e.g. cryogenic tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/025—Bulk storage in barges or on ships
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • F17C2201/0152—Lobes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Description

本発明は、液化ガスを主機関などの燃料として使用する液化ガス燃料船に関する。 The present invention relates to a liquefied gas fueled ship that uses liquefied gas as fuel for a main engine and the like.

近年では、船舶に関しても国際海事機関によりＳＯｘ排出規制が海域毎に段階的に進められている。このような海域毎のＳＯｘ排出規制に合わせて、主機関の燃料に天然ガスを利用する液化ガス燃料船の建造も進められている。例えば、タンカーにおいては、船体縦強度を考慮して、エンジンを駆動するためのＬＮＧを貯留する燃料タンクを船体長手方向の中央部付近に配置する構成が提案されている（特許文献１参照）。 In recent years, the International Maritime Organization has been gradually implementing SOx emission regulations for ships in each sea area. In accordance with such SOx emission regulations for each sea area, construction of liquefied gas fueled ships that use natural gas as fuel for the main engine is also progressing. For example, in a tanker, a configuration has been proposed in which a fuel tank for storing LNG for driving an engine is arranged near the longitudinal center of the hull in consideration of the longitudinal strength of the hull (see Patent Document 1).

特開２０１２－１２１４０１号公報Japanese Patent Application Publication No. 2012-121401

しかし、船体長手方向中央部付近は、まとまった広い空間を確保できる領域のため、船内のスペースを有効に活用するには、このような領域に貨物室や客室などを配置することが望ましい。特にこれは自動車運搬船やコンテナ船、ＲＯ－ＲＯ船、客船などにおいて顕著である。 However, the area near the center in the longitudinal direction of the ship is an area where a large and organized space can be secured, so in order to effectively utilize the space inside the ship, it is desirable to arrange cargo holds, passenger cabins, etc. in such an area. This is particularly noticeable in car carriers, container ships, RO-RO ships, passenger ships, etc.

本発明は、液化ガス燃料船において貨物区画などのスペースを効率的に確保することを課題としている。 An object of the present invention is to efficiently secure space such as a cargo compartment in a liquefied gas fueled ship.

本発明の液化ガス燃料船は、液化ガスを燃料として使用する液化ガス燃料船であって、液化ガスを貯蔵するための液化ガス燃料タンクと、液化ガス燃料タンク内の燃料を燃料消費部へ供給するための液化ガス供給システムとを備え、液化ガス燃料タンクの少なくとも一部が、船側から型幅の１／５よりも内側に配置されるとともに、液化ガス供給システムが、液化ガス燃料タンクと船側の間、および／または、液化ガス燃料タンクと機関室前壁との間に配置されることを特徴としている。 The liquefied gas fueled ship of the present invention is a liquefied gas fueled ship that uses liquefied gas as fuel, and includes a liquefied gas fuel tank for storing liquefied gas, and a liquefied gas fuel tank for supplying the fuel in the liquefied gas fuel tank to a fuel consumption section. At least a part of the liquefied gas fuel tank is arranged inside 1/5 of the mold width from the ship side, and the liquefied gas supply system is arranged between the liquefied gas fuel tank and the ship side. and/or between the liquefied gas fuel tank and the front wall of the engine room.

液化ガス燃料供給システムは船側から型幅の１／５よりも外側に配置されることが好ましい。 It is preferable that the liquefied gas fuel supply system is disposed outside one-fifth of the mold width from the ship side.

液化ガス燃料タンクの容量の少なくとも１／３は、全長Ｌの中心から長手方向後方へ３０％Ｌの位置から機関室前壁までの間に配置されるか、全長Ｌの中心から長手方向前方へ３５％Ｌの位置から船首隔壁までの間に配置されることが好ましい。 At least 1/3 of the capacity of the liquefied gas fuel tank is located between a position 30% L longitudinally rearward from the center of the overall length L to the front wall of the engine room, or longitudinally forward from the center of the overall length L It is preferable to arrange it between the 35% L position and the bow bulkhead.

液化ガス燃料船は、液化ガス燃料タンクを複数備える１列センターピラー構造を有する船舶であって、少なくとも一対の液化ガス燃料タンクが船体中心線に対して左右対称に配置されることが好ましい。 The liquefied gas fuel ship is a ship having a single-row center pillar structure including a plurality of liquefied gas fuel tanks, and it is preferable that at least one pair of liquefied gas fuel tanks are arranged symmetrically with respect to the center line of the ship.

液化ガス燃料タンクは、複数の円筒タンクが長手方向に沿って並び連結された多筒タンクであってもよい。多筒タンクは、例えば双筒タンクであり、双筒タンクにおいて、両円筒部直上に設けられるタンクコネクションルームが連結され一体化されることが好ましい。更に、液化ガス燃料タンクは、船首または船尾の少なくとも一方の側において先すぼまりの形状を呈してもよい。 The liquefied gas fuel tank may be a multi-cylindrical tank in which a plurality of cylindrical tanks are arranged and connected along the longitudinal direction. The multi-tube tank is, for example, a twin-tube tank, and in the twin-tube tank, tank connection rooms provided directly above both cylindrical portions are preferably connected and integrated. Furthermore, the liquefied gas fuel tank may have a tapered shape on at least one side of the bow or the stern.

液化ガス燃料タンクは、フリーボードデッキよりも下に配置されることが好ましい。このとき液化ガス燃料タンクは、フリーボードデッキ下の深さの８０％以下および／または、フリーボードデッキから２．４ｍ下方の位置より下側に配置されることが好ましい。 Preferably, the liquefied gas fuel tank is located below the freeboard deck. At this time, it is preferable that the liquefied gas fuel tank is arranged below 80% of the depth below the freeboard deck and/or below a position 2.4 m below the freeboard deck.

液化ガス燃料タンクは、例えば船体の二重底直上に支持構造を介して設置される。 The liquefied gas fuel tank is installed, for example, directly above the double bottom of the hull via a support structure.

本発明によれば、液化ガス燃料船において貨物区画などのスペースを効率的に確保することができる。 According to the present invention, space such as a cargo compartment can be efficiently secured in a liquefied gas fueled ship.

本発明の第１実施形態である液化ガス燃料船の側面図、横断面図、平面図である。BRIEF DESCRIPTION OF THE DRAWINGS They are a side view, a cross-sectional view, and a plan view of a liquefied gas fueled ship according to a first embodiment of the present invention. 液化ガス燃料タンクの周りの部分拡大平面図である。FIG. 3 is a partially enlarged plan view around the liquefied gas fuel tank. 第２実施形態の液化ガス燃料タンクを搭載した液化ガス燃料船の横断面図である。FIG. 2 is a cross-sectional view of a liquefied gas fueled ship equipped with a liquefied gas fuel tank according to a second embodiment. 第２実施形態の液化ガス燃料タンクを搭載した液化ガス燃料船の部分的な平面図である。FIG. 3 is a partial plan view of a liquefied gas fueled ship equipped with a liquefied gas fuel tank according to a second embodiment.

以下、本発明の実施形態について添付図面を参照して説明する。
図１は、本発明の第１実施形態である液化ガス燃料船の側面図（図１（ａ））、横断面図（図１（ｂ））、平面図（図１（ｃ））である。なお、図１（ｂ）は、液化ガス燃料タンクの略中心を通る図１（ａ）のＩ－Ｉ断面図、図１（ｃ）は液化ガス燃料タンクの略中心を通る図１（ａ）のＩＩ－ＩＩ断面の平面図である。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a side view (FIG. 1(a)), a cross-sectional view (FIG. 1(b)), and a plan view (FIG. 1(c)) of a liquefied gas fueled ship according to a first embodiment of the present invention. . Note that FIG. 1(b) is a sectional view taken along line II in FIG. 1(a) passing approximately through the center of the liquefied gas fuel tank, and FIG. 1(c) is a cross-sectional view taken along line II in FIG. FIG.

本発明が適用される液化ガス燃料船には、自動車運搬船、コンテナ船、ＲＯ－ＲＯ船、客船などが含まれ、第１実施形態では自動車運搬船を例に説明を行なう。図１に示されるように、自動車運搬船１０では、船尾部のフリーボードデッキ１２の下方に機関室１４が設けられ、フリーボードデッキ１２よりも上方区画は、略全て自動車搭載区画１６として使用され、最上部の船首側に居住区画１８が配置される。また船体中央部には、各デッキを支持する複数のセンターピラー１９が、船体中心線に沿って１列設けられる。機関室１４には、ＬＮＧなどの液化ガスを燃料として消費する主機関や発電機関、ボイラーなどの設備が配置され、液化ガスは複数の液化ガス燃料タンク２０内に貯蔵される。 Liquefied gas fuel ships to which the present invention is applied include car carriers, container ships, RO-RO ships, passenger ships, etc., and the first embodiment will be explained using a car carrier as an example. As shown in FIG. 1, in the car carrier 10, an engine room 14 is provided below the freeboard deck 12 at the stern, and almost all of the section above the freeboard deck 12 is used as a car loading section 16. A living quarters 18 is arranged on the bow side at the top. In addition, a plurality of center pillars 19 that support each deck are provided in a row along the center line of the ship in the center of the ship. Equipment such as a main engine, a power generation engine, and a boiler that consume liquefied gas such as LNG as fuel are arranged in the engine room 14, and the liquefied gas is stored in a plurality of liquefied gas fuel tanks 20.

液化ガス燃料タンク２０は、センターピラー１９を挟んで船体の左右に対称に配置され、第１実施形態では、左右一対の円筒タンクが液化ガス燃料タンク２０として採用される。液化ガス燃料タンク２０は、夏期満載喫水線の位置で船側２５から船体中心線に直角方向に船内側に測って型幅Ｂの１／５よりも内側に少なくともその一部が配置され、二重底の直上に各々支持構造２１を介して設置される。なお、図１に示される例では、液化ガス燃料タンク２０の全体が、型幅Ｂの１／５よりも内側に収容されているが、その一部が船側２５から型幅Ｂの１／５よりも外側に配置されていてもよい。また、各液化ガス燃料タンク２０の直上には、タンクへの接続物やタンク付属弁を取り囲んだタンクコネクションルーム２３が設けられる。 The liquefied gas fuel tanks 20 are arranged symmetrically on the left and right sides of the hull across the center pillar 19, and in the first embodiment, a pair of left and right cylindrical tanks are employed as the liquefied gas fuel tanks 20. The liquefied gas fuel tank 20 is at least partially disposed inside 1/5 of the mold width B as measured from the ship side 25 toward the inside of the ship in a direction perpendicular to the hull centerline at the summer load waterline, and has a double bottom. are installed directly above each via a support structure 21. In the example shown in FIG. 1, the entire liquefied gas fuel tank 20 is housed inside 1/5 of the mold width B, but a part of it is housed inside 1/5 of the mold width B from the ship side 25. It may be placed outside. Further, directly above each liquefied gas fuel tank 20, a tank connection room 23 is provided that surrounds connection objects to the tank and valves attached to the tank.

第１実施形態では更に、全ての液化ガス燃料タンク２０の総容量の少なくとも１／３が、自動車運搬船１０の全長Ｌの中心Ｃから長手方向後方（船尾側）へ３０％Ｌの位置から機関室１４の前壁１４Ｗまでの間の区間Ａaにあって、フリーボードデッキ１２よりも下側の区画に収容され、その区画は、フリーボードデッキ１２下の深さＤの８０％以下および／または、フリーボードデッキ１２から２．４ｍ下方の位置より下側の区画であることがより好ましい。フリーボードデッキ１２と液化ガス燃料タンク２０との間には、例えば自動車を収容するためのデッキが設けられる。なお、全長Ｌの中心Ｃから長手方向後方（船尾側）へ３０％Ｌの位置よりも前側の区画も、主に自動車を収容するための貨物区画として使用される。 In the first embodiment, furthermore, at least 1/3 of the total capacity of all the liquefied gas fuel tanks 20 is connected to the engine room from a position 30% L in the longitudinal direction rearward (stern side) from the center C of the entire length L of the car carrier 10. 14 to the front wall 14W, and is housed in a section below the freeboard deck 12, and that section is 80% or less of the depth D below the freeboard deck 12 and/or , it is more preferable that the section is located below a position 2.4 m below the freeboard deck 12. A deck for accommodating a car, for example, is provided between the freeboard deck 12 and the liquefied gas fuel tank 20. In addition, the section in front of a position 30% L from the center C of the overall length L in the longitudinal direction rearward (stern side) is also used as a cargo section mainly for accommodating automobiles.

液化ガス燃料タンク２０に貯蔵された液化ガスは、図示しない液化ガス供給システムを通して機関室１４の主機関や発電機関、ボイラーなどの設備に供給される。図２に、液化ガス燃料タンク２０の周りの部分拡大平面図を示し、第１実施形態において液化ガス供給システムが設置される領域を示す。 The liquefied gas stored in the liquefied gas fuel tank 20 is supplied to equipment such as the main engine, power generation engine, and boiler in the engine room 14 through a liquefied gas supply system (not shown). FIG. 2 shows a partially enlarged plan view around the liquefied gas fuel tank 20, showing the area where the liquefied gas supply system is installed in the first embodiment.

第１実施形態において、液化ガス供給システムは、液化ガス燃料タンク２０と船側２５の間の領域Ｓ１、および／または、液化ガス燃料タンク２０と機関室１４の前壁１４Ｗとの間の領域Ｓ２に配置される。また、領域Ｓ１の内、型幅Ｂの１／５よりも外側の領域Ｓ３に配置されてもよい。 In the first embodiment, the liquefied gas supply system is provided in a region S1 between the liquefied gas fuel tank 20 and the ship side 25 and/or a region S2 between the liquefied gas fuel tank 20 and the front wall 14W of the engine room 14. Placed. Further, it may be arranged in a region S3 outside 1/5 of the mold width B within the region S1.

以上のように第１実施形態によれば、船側からの距離を確保しながらも、船体長手方向中央部よりも船尾寄りに液化ガス燃料タンクが配置されるので、液化ガス燃料タンクの安全性を確保しながら、船体長手方向中央部付近に貨物区画などを設けることが可能になり、船体内の空間を効率的に利用することができる。 As described above, according to the first embodiment, the liquefied gas fuel tank is placed closer to the stern than the center in the longitudinal direction of the hull while ensuring a distance from the ship's side, so the safety of the liquefied gas fuel tank is improved. It is now possible to provide a cargo compartment near the center in the longitudinal direction of the hull, while ensuring space within the hull can be used efficiently.

更に、液化ガス供給システムを、液化ガス燃料タンクと船側の間や、機関室の前壁との間に配置することで、液化ガス燃料タンクと液化ガス供給システム、配管等の配置が最適化され、空間利用の効率が更に向上する。また、液化ガス燃料タンクの収容される空間の高さを低くすることで、より効率的な空間利用が可能となる。また、本実施形態で採用された１列センターピラー構造は、車両の積載効率が良いため、１列センターピラー構造を維持したまま、船体の左右に液化ガス燃料タンクを配置することで、タンク設置による車両の減少を少なくすることができる。 Furthermore, by placing the liquefied gas supply system between the liquefied gas fuel tank and the ship's side or between the front wall of the engine room, the arrangement of the liquefied gas fuel tank, liquefied gas supply system, piping, etc. can be optimized. , the efficiency of space utilization is further improved. Further, by lowering the height of the space in which the liquefied gas fuel tank is accommodated, more efficient space utilization becomes possible. In addition, the single-row center pillar structure adopted in this embodiment has good loading efficiency for vehicles, so by placing liquefied gas fuel tanks on the left and right sides of the hull while maintaining the single-row center pillar structure, tank installation is possible. The decrease in the number of vehicles due to this can be reduced.

なお、本実施形態では、液化ガス燃料タンクを、船尾寄りに配置したが、全ての液化ガス燃料タンクの容量の少なくとも１／３を全長Ｌの中心Ｃから長手方向前方へ３５％Ｌの位置から船首隔壁１５までの間の区間Ａfに配置する構成とすることもできる。また、型幅Ｂの１／５よりも内側の空間において、フリーボードデッキ下の区間Ａa、Ａfの双方に液化ガス燃料タンクの少なくともその一部を配置することもできる。また、液化ガス燃料タンクの一部を曝露甲板上に置くこともできる。その際、曝露甲板上の液化ガス燃料タンクを機関室の前壁位置より前方に配置すると液化ガス供給システムとの接続や船体のトリム調整の点で好ましい。 In this embodiment, the liquefied gas fuel tanks are arranged closer to the stern, but at least 1/3 of the capacity of all the liquefied gas fuel tanks is located at a position 35% L forward in the longitudinal direction from the center C of the overall length L. It may also be arranged in the section A f up to the bow bulkhead 15. Furthermore, at least a part of the liquefied gas fuel tank can be arranged in both sections A a and A f below the freeboard deck in a space inside 1/5 of the mold width B. It is also possible to place part of the liquefied gas fuel tank on the exposure deck. In this case, it is preferable to arrange the liquefied gas fuel tank on the exposure deck forward of the front wall of the engine room in terms of connection with the liquefied gas supply system and trim adjustment of the hull.

次に図３、４に第２実施形態の液化ガス燃料船における液化ガス燃料タンクの構成を示す。なお、第２実施形態の第１実施形態からの構成の違いは、液化ガス燃料タンクの構造および配置のみであり、それ以外の構成は、第１実施形態と略同様であり、その説明を省略する。 Next, FIGS. 3 and 4 show the configuration of a liquefied gas fuel tank in a liquefied gas fueled ship according to a second embodiment. The difference in the configuration of the second embodiment from the first embodiment is only the structure and arrangement of the liquefied gas fuel tank, and the other configurations are substantially the same as the first embodiment, and the explanation thereof will be omitted. do.

第１実施形態の液化ガス燃料タンク２０は、それぞれ円筒形状を呈していた。一方、第２実施形態の液化ガス燃料タンク２２には、複数の円筒タンクを長手方向に沿って並べ連結した多筒タンクが用いられる。図３では、２つの円筒タンクを幅方向に並べて連結した双筒タンク（バイローブタンク）が例示され、一対の双筒タンク２２が船体内においてセンターピラー１９を挟んで左右対称に配置される。 The liquefied gas fuel tanks 20 of the first embodiment each had a cylindrical shape. On the other hand, the liquefied gas fuel tank 22 of the second embodiment uses a multi-cylinder tank in which a plurality of cylindrical tanks are arranged and connected along the longitudinal direction. In FIG. 3, a twin-tube tank (bilobed tank) in which two cylindrical tanks are arranged and connected in the width direction is illustrated, and a pair of twin-tube tanks 22 are arranged symmetrically within the hull with the center pillar 19 in between.

また、第２実施形態では、図４の部分平面図に示されるように液化ガス燃料タンク２２は、機関室１４の前壁１４Ｗから船首隔壁１５までの間に配置される。また、第２実施形態では、液化ガス燃料タンク２２の内、最前部の液化ガス燃料タンク２２１と最後部の液化ガス燃料タンク２２２が、船首尾の先すぼまり形状に合わせた形状に構成され、液化ガス燃料タンク２２１、２２２の間に配置される液化ガス燃料タンク２２は、通常の円筒形多筒タンクとされる。 Furthermore, in the second embodiment, as shown in the partial plan view of FIG. 4, the liquefied gas fuel tank 22 is arranged between the front wall 14W of the engine room 14 and the bow bulkhead 15. Further, in the second embodiment, among the liquefied gas fuel tanks 22, the foremost liquefied gas fuel tank 221 and the rearmost liquefied gas fuel tank 222 are configured to have a shape that matches the tapered shape of the bow and stern. The liquefied gas fuel tank 22 disposed between the liquefied gas fuel tanks 221 and 222 is a normal cylindrical multi-tube tank.

すなわち、最前部の液化ガス燃料タンク２２１の先端部の内側（センターラインＣＬ側）の側面の母線は、船体長手方向に沿ったままとされるものの、液化ガス燃料タンク２２１の先端部の外側（船側側）の側面の母線は、徐々に狭くなる船首部の側壁形状に合わせて内側に傾けられる。これにより双筒の液化ガス燃料タンク２２１は、各タンクの深さ方向の寸法を維持したまま、幅方向の寸法のみを先端に行くにつれて縮減した先すぼまりの形状とされる。先端部（船首側）で１つの円筒に集約されたタンクの径は、液化燃料タンク２２１の後端の双筒タンクの１つのタンクの径と同じになる。これにより、タンク深さ寸法はデッキ深さに合わせたまま、幅方向のみ船型に合わせて調整可能なため、タンク容量を効果的に確保できる。 That is, although the generatrix on the inside (center line CL side) side of the tip of the foremost liquefied gas fuel tank 221 remains along the longitudinal direction of the hull, The side generatrix (on the ship's side) is tilted inward to match the shape of the side wall of the bow, which gradually narrows. As a result, the twin-tube liquefied gas fuel tank 221 has a tapered shape in which only the dimension in the width direction decreases toward the tip while maintaining the dimension in the depth direction of each tank. The diameter of the tank gathered into one cylinder at the tip (bow side) is the same as the diameter of one of the twin-tube tanks at the rear end of the liquefied fuel tank 221. As a result, the tank depth can be adjusted to match the ship's shape only in the width direction, while keeping it consistent with the deck depth, making it possible to effectively secure tank capacity.

また、最後部の液化ガス燃料タンク２２２の後端部に関しても、後端部の内側（センターラインＣＬ側）の側面の母線は、船体長手方向に沿ったままとされるものの、後端部の外側（船側側）の側面の母線は、徐々に狭くなる船尾部の側壁形状に合わせて内側に傾けられ、液化ガス燃料タンク２２１と同様に先すぼまりの形状とされる。 Also, regarding the rear end of the rearmost liquefied gas fuel tank 222, the generatrix on the inner side of the rear end (on the center line CL side) remains along the longitudinal direction of the hull; The generatrix of the outer (ship side) side surface is inclined inward in accordance with the shape of the side wall of the stern section, which gradually becomes narrower, and has a tapered shape similar to the liquefied gas fuel tank 221.

各液化ガス燃料タンク２２は、例えば二重底の直上に各々支持構造２４を介して設置される。また液化ガス燃料タンク２２の各円筒部の直上に設けられるタンクコネクションルームは、本実施形態では双筒タンクの両円筒部に跨る一体化されたタンクコネクションルーム２６として構成される。 Each liquefied gas fuel tank 22 is installed, for example, directly above the double bottom via a support structure 24. Further, in this embodiment, the tank connection room provided directly above each cylindrical portion of the liquefied gas fuel tank 22 is configured as an integrated tank connection room 26 spanning both cylindrical portions of the twin-tube tank.

以上のように、第２実施形態においても、第１実施形態と略同様の効果が得られる。また、多筒タンクは、同容量の円筒タンクに比べ深さ方向の寸法を抑えることができるので、液化ガス燃料タンク２２とフリーボードデッキの間の空間をより効率的に確保することができる。 As described above, the second embodiment also provides substantially the same effects as the first embodiment. Further, since the multi-cylinder tank can have a smaller depth dimension than a cylindrical tank of the same capacity, the space between the liquefied gas fuel tank 22 and the freeboard deck can be secured more efficiently.

また、本実施形態のように双筒タンクの両円筒部に跨る一体化されたタンクコネクションルームを採用することで、タンクコネクションルームの幅を狭くでき、より広い空きスペースが確保できる。そのため自動車運搬船では、例えばその分を拡張された自動車搭載区画に利用するなど様々な用途に利用できる。また、同構成によりタンクの構造を簡素化でき、材料費、建造費を削減できる。また、液化ガス燃料タンクを二重底直上に設置することにより、タンクの位置をより低くし、上部の車両デッキをより多く確保することが可能になる。 Furthermore, by employing an integrated tank connection room spanning both cylindrical portions of a twin-tube tank as in this embodiment, the width of the tank connection room can be narrowed, and a larger empty space can be secured. Therefore, on a car carrier, the space can be used for various purposes, such as using it as an expanded car loading area. The same configuration also simplifies the structure of the tank, reducing material and construction costs. Furthermore, by installing the liquefied gas fuel tank directly above the double bottom, it is possible to lower the tank position and secure more space on the upper vehicle deck.

なお、第２実施形態においても、円筒長さや径を小さくすることで、最前部、最後部の一方または両方を円筒形とすることもできる。また、第１実施形態の液化ガス燃料タンクに先すぼまりの形状を適用することもできる。また液化ガス燃料タンクの数は奇数でも良く、左右で大きさが異なるペアが有っても良い。 In addition, also in 2nd Embodiment, one or both of the frontmost part and the rearmost part can also be made into a cylindrical shape by making the cylinder length and diameter small. Further, a tapered shape can also be applied to the liquefied gas fuel tank of the first embodiment. Further, the number of liquefied gas fuel tanks may be an odd number, and there may be a pair of left and right tanks with different sizes.

第１、第２実施形態の説明で述べた、液化ガス燃料タンクの少なくとも一部が、船側から型幅の１／５よりも内側に配置されること、液化ガス供給システムが、液化ガス燃料タンクと船側の間、および／または、液化ガス燃料タンクと機関室前壁との間に配置されること以外の構成は任意であり、矛盾しない範囲で様々に組み合わせて採用することもできる。 As described in the description of the first and second embodiments, at least a part of the liquefied gas fuel tank is arranged inside 1/5 of the mold width from the ship side, and the liquefied gas supply system is connected to the liquefied gas fuel tank. Any configuration other than being disposed between the liquefied gas fuel tank and the ship's side and/or between the liquefied gas fuel tank and the front wall of the engine room is arbitrary, and various combinations may be employed as long as there is no contradiction.

１０ 液化ガス燃料船
１２ フリーボードデッキ
１４ 機関室
１４Ｗ 機関室前壁
１５ 船首隔壁
１６ 自動車搭載区画
１８ 居住区
１９ センターピラー
２０、２２、２２１、２２２ 液化ガス燃料タンク
２１、２４ 支持構造
２３、２６ タンクコネクションルーム
２５ 船側
Ｂ 型幅
Ｃ 全長の中心位置
ＣＬ センターライン
Ｄ フリーボードデッキ深さ
Ｌ 全長 10 Liquefied gas fuel ship 12 Freeboard deck 14 Engine room 14W Engine room front wall 15 Forward bulkhead 16 Car loading compartment 18 Living area 19 Center pillar 20, 22, 221, 222 Liquefied gas fuel tank 21, 24 Support structure 23, 26 Tank Connection room 25 Ship side B Type width C Center position of overall length CL Center line D Freeboard deck depth L Overall length

Claims (3)

液化ガスを燃料として使用する液化ガス燃料船であって、
前記液化ガスを貯蔵するための液化ガス燃料タンクと、
前記液化ガス燃料タンク内の燃料を燃料消費部へ供給するための液化ガス供給システムとを備え、
前記液化ガス燃料タンクの少なくとも一部が、船側から型幅の１／５よりも内側に配置されるとともに、前記液化ガス供給システムが、船側から型幅の１／５よりも外側に配置され、
前記液化ガス燃料タンクの容量の少なくとも１／３が、全長Ｌの中心から長手方向後方へ３０％Ｌの位置から機関室前壁までの間に配置される
ことを特徴とする液化ガス燃料船。 A liquefied gas fueled ship that uses liquefied gas as fuel,
a liquefied gas fuel tank for storing the liquefied gas;
and a liquefied gas supply system for supplying the fuel in the liquefied gas fuel tank to the fuel consumption section,
At least a part of the liquefied gas fuel tank is arranged inside 1/5 of the mold width from the ship side, and the liquefied gas supply system is arranged outside 1/5 of the mold width from the ship side,
The liquefied gas fuel, wherein at least 1/3 of the capacity of the liquefied gas fuel tank is disposed between a position 30% L longitudinally rearward from the center of the overall length L and a front wall of the engine room. ship. 液化ガスを燃料として使用する液化ガス燃料船であって、
前記液化ガスを貯蔵するための液化ガス燃料タンクと、
前記液化ガス燃料タンク内の燃料を燃料消費部へ供給するための液化ガス供給システムとを備え、
前記液化ガス燃料タンクの少なくとも一部が、船側から型幅の１／５よりも内側に配置されるとともに、前記液化ガス供給システムが、船側から型幅の１／５よりも外側に配置され、
前記液化ガス燃料タンクの容量の少なくとも１／３が、全長Ｌの中心から長手方向前方へ３５％Ｌの位置から船首隔壁までの間に配置される
ことを特徴とする液化ガス燃料船。 A liquefied gas fueled ship that uses liquefied gas as fuel,
a liquefied gas fuel tank for storing the liquefied gas;
and a liquefied gas supply system for supplying the fuel in the liquefied gas fuel tank to the fuel consumption section,
At least a part of the liquefied gas fuel tank is arranged inside 1/5 of the mold width from the ship side, and the liquefied gas supply system is arranged outside 1/5 of the mold width from the ship side,
A liquefied gas fuel ship, wherein at least one-third of the capacity of the liquefied gas fuel tank is disposed between a position 35% L forward in the longitudinal direction from the center of the overall length L and a bow bulkhead. 液化ガスを燃料として使用する液化ガス燃料船であって、
前記液化ガスを貯蔵するための液化ガス燃料タンクと、
前記液化ガス燃料タンク内の燃料を燃料消費部へ供給するための液化ガス供給システムとを備え、
前記液化ガス燃料タンクの少なくとも一部が、船側から型幅の１／５よりも内側に配置されるとともに、前記液化ガス供給システムが、船側から型幅の１／５よりも外側に配置され、
前記液化ガス燃料船が、前記液化ガス燃料タンクを複数備える１列センターピラー構造を有する船舶であって、少なくとも一対の前記液化ガス燃料タンクが船体中心線に対して左右対称に配置される
ことを特徴とする液化ガス燃料船。
A liquefied gas fueled ship that uses liquefied gas as fuel,
a liquefied gas fuel tank for storing the liquefied gas;
and a liquefied gas supply system for supplying the fuel in the liquefied gas fuel tank to the fuel consumption section,
At least a part of the liquefied gas fuel tank is arranged inside 1/5 of the mold width from the ship side, and the liquefied gas supply system is arranged outside 1/5 of the mold width from the ship side,
The liquefied gas fuel ship is a ship having a single-row center pillar structure including a plurality of the liquefied gas fuel tanks, and at least one pair of the liquefied gas fuel tanks are arranged symmetrically with respect to the center line of the ship. Characteristics of liquefied gas fueled ships.
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