WO2023199430A1 - Offshore liquefied gas storage facility - Google Patents

Offshore liquefied gas storage facility Download PDF

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Publication number
WO2023199430A1
WO2023199430A1 PCT/JP2022/017705 JP2022017705W WO2023199430A1 WO 2023199430 A1 WO2023199430 A1 WO 2023199430A1 JP 2022017705 W JP2022017705 W JP 2022017705W WO 2023199430 A1 WO2023199430 A1 WO 2023199430A1
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Prior art keywords
tank
liquefied gas
gas storage
row
storage facility
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PCT/JP2022/017705
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French (fr)
Japanese (ja)
Inventor
宏之 武田
麻子 三橋
梨花子 後藤
元気 横山
祐紀 木村
晴彦 冨永
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川崎重工業株式会社
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Application filed by 川崎重工業株式会社 filed Critical 川崎重工業株式会社
Priority to PCT/JP2022/017705 priority Critical patent/WO2023199430A1/en
Publication of WO2023199430A1 publication Critical patent/WO2023199430A1/en

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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 
    • B63B15/00—Superstructures, deckhouses, wheelhouses or the like; Arrangements or adaptations of masts or spars, e.g. bowsprits
    • 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
    • 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels

Definitions

  • the present disclosure relates to offshore liquefied gas storage equipment.
  • Offshore liquefied gas storage facilities such as liquefied gas carriers are generally equipped with vent masts for gas discharge in order to maintain appropriate pressure in tanks that store liquefied gas (see, for example, Patent Document 1). ). Furthermore, international regulations require that cargo tanks be equipped with vent masts for gas discharge, and that vent masts must be installed at least a specified distance from crew living and work areas. .
  • the vent mast it is convenient to install the living and work areas, which are the activity areas of the crew, in the bow or stern area, in terms of simplifying the arrangement of various structures on the offshore equipment and making effective use of space. . Therefore, it is desirable to arrange the vent mast at an appropriate distance from the activity area while ensuring as wide an activity area as possible for the crew within the limited space on the offshore facility.
  • an object of the present disclosure is to provide a vent mast arrangement in an offshore liquefied gas storage facility that enables simplification of the arrangement on the equipment and effective use of space. .
  • the offshore liquefied gas storage facility includes: floating body and a tank row consisting of a plurality of tanks for storing liquefied gas installed in a predetermined direction on the floating body; a vent mast provided with a tank cover on or over each tank; Equipped with In a tank arranged at the front end and a tank arranged at the rear end of the tank row, each vent mast is located at a position closer to the center of the tank row in the predetermined direction with respect to the center position of the tank in the predetermined direction. It is set in.
  • FIG. 1 is a side view showing a schematic configuration of an offshore liquefied gas storage facility according to an embodiment of the present disclosure.
  • FIG. 2 is a plan view showing a schematic configuration of the offshore liquefied gas storage facility shown in FIG. 1.
  • FIG. 1 is a side view showing a schematic configuration of an offshore liquefied gas storage facility according to an embodiment of the present disclosure.
  • FIG. 2 is a plan view showing a schematic configuration of the offshore liquefied gas storage facility shown in FIG. 1.
  • FIG. 1 shows a liquefied gas storage ship S that is an example of offshore liquefied gas storage equipment according to an embodiment of the present disclosure.
  • This liquefied gas storage ship S includes a floating hull 1 and a plurality of tanks 3 (four in this example) installed in the hull 1 for storing liquefied gas.
  • liquefied gas storage ship refers to a ship that has the function of storing liquefied gas.
  • the liquefied gas storage ship S in this embodiment is a liquefied gas carrier ship.
  • the liquefied gas storage ships S include, for example, liquefied gas fuel ships, bunkering ships that supply liquefied gas to other ships, and the like.
  • the plurality of tanks 3 are arranged so that their centers are lined up in a straight line in a plan view along a predetermined direction.
  • the plurality of tanks 3 are arranged along the longitudinal direction X of the liquefied gas storage ship S, which is the above-mentioned "predetermined direction".
  • a row consisting of a plurality of tanks 3 arranged in this manner is referred to as a "tank row L.”
  • one end side and the other end side in the predetermined direction are respectively referred to as "front” and "rear” with respect to the traveling direction of the liquefied gas storage ship S.
  • each of the plurality of tanks 3 constituting the tank row L may be called, in order from the front tank, a first tank 3A, a second tank 3B, a third tank 3C, and a fourth tank 3D. .
  • the liquefied gases stored in the tank 3 include, for example, liquefied ammonia (LNH 3 , approximately -33°C), liquefied petroleum gas (LPG, approximately -45°C), liquefied ethylene gas (LEG, approximately -100°C), and liquefied natural gas. gas (LNG, approximately -160°C), liquefied hydrogen (LH 2 , approximately -250°C), and liquefied helium (LHe, approximately -270°C).
  • liquefied hydrogen is stored in the tank 3.
  • the tank 3 in this embodiment is configured as a double shell tank having an inner tank and an outer tank.
  • This tank 3 is normally operated in a state in which vaporized gas of liquefied gas is sealed in the space between the inner and outer tanks, which is a heat insulating layer.
  • the heat insulation method for the tank 3 is not limited to this example, and for example, the space between the inner and outer tanks may be made into a vacuum layer.
  • the liquefied gas storage ship S includes a structure 5 for the crew members of the liquefied gas storage ship S to perform activities (hereinafter referred to as "crew activity structure").
  • crew activity structure 5" refers to all structures in which crew members are expected to enter and engage in some kind of activity, including residential structures used by crew members to live on board the ship.
  • the "crew activity structure 5" includes a work structure such as a cargo machine room that the crew enters in order to navigate and operate the liquefied gas storage ship S.
  • the liquefied gas storage ship S has a front crew activity structure 5F provided in the bow area FR in front of the tank row L, and a rear crew activity structure 5F provided in the stern area RR behind the tank row L. It also includes an activity structure 5R. Specifically, in this embodiment, the front occupant activity structure 5F is configured as a residential structure, and the rear occupant activity structure 5R is configured as a work structure. These crew activity structures 5 are installed on the deck 7 (FIG. 1) of the liquefied gas storage ship S. In this embodiment, the crew activity structure 5 is not provided in the middle of the tank row L.
  • the front crew activity structure 5F is a residential structure
  • the rear crew activity structure 5R is Configuring these as working structures is only one example, and it is arbitrary what type of occupant activity structure 5 they are made into.
  • a residential structure is installed behind tank row L, the view from the residential structure may be obstructed by tank 3 and its attached equipment, so front passenger activity structure 5F should be placed behind the residential structure. It is preferable to make it a physical object.
  • the work structure is a cargo machinery room, it is better to locate it near the rear engine room where gas processing equipment is normally located, so that the gas piping can be shortened, making it easier for the rear crew to operate the cargo machinery room.
  • the storage structure 5R is a cargo machine room.
  • each tank 3 is covered by a tank cover 8.
  • the tank cover has a shape corresponding to the shape of the upper part of each tank 3.
  • the shape of the tank cover is not limited to this example, and may have a shape that covers the entire tank row L, for example.
  • a vent mast 9 is provided on the tank cover 8 of each tank 3, which is a gas release tower that releases vaporized gas generated in the tank 3 into the atmosphere from a position higher than the tank 3. .
  • Each tank 3 is provided with a safety valve, and when the gas pressure inside the tank 3 reaches the set pressure of the safety valve, gas is released from the vent mast 9.
  • the tank cover 8 has a shape that integrally covers a plurality of tanks 3, the fact that the vent mast 9 is provided on the tank cover 8 of each tank means that each vent mast 9 is This means that it is provided in a portion of the tank cover 8 that overlaps each tank 3.
  • the vent mast 9 may be provided directly on each tank. Further, the tank cover 8 may be omitted.
  • the vent mast 9 when explaining the position of the vent mast 9, for convenience, even if the vent mast 9 is provided on the tank cover 8 of each tank 9, it will be expressed as "the vent mast 9 provided on the tank 9". There are cases.
  • each vent mast 9 is provided at a position closer to the center of the tank row L in the longitudinal direction X with reference to the center position of the tank 3 in the longitudinal direction X. More specifically, in this embodiment, the tanks 3 are arranged in front of the center of the tank row L, in this example, the first tank 3A and the second tank 3B, and the tanks 3 are arranged in the rear side of the tank row L.
  • each vent mast 9 is provided at a position closer to the center of the tank row L in the ship length direction X.
  • the center of the tank row L means the center position between the front end of the tank 3 arranged at the front end in the longitudinal direction X and the rear end of the tank 3 arranged at the rear end.
  • such a position of the vent mast 9 may be simply expressed as "a position near the center” or the like.
  • each vent mast 9 is arranged on the center line C of the tank row L passing through the center of each tank 3 in the width direction W. By arranging in this manner, each vent mast 9 can be arranged closer to the center. However, the vent mast 9 may be arranged at a position shifted from the center line C of the tank row L.
  • the vent mast 9 is arranged at a position closer to the center of each tank 3 in the longitudinal direction X. It is not necessary to be present. However, by arranging the vent masts 9 of these tanks 3 at a position closer to the center in the ship's vessel direction X, they can be arranged as far away from the bow area FR and the stern area RR as possible. Note that, unlike the illustrated example, when the tank row L is constituted by an odd number of tanks 3, the position of the vent mast 9 for the tank 3 disposed at the center of the tank row L is not particularly limited.
  • the vent masts 9 provided in the tanks 3B and 3C other than the tanks 3A and 3D closest to the crew activity structure 5 in the tank row L are configured as manual vent vent masts 9M.
  • the third tank 3C which is the tank 3 other than the first tank 3A closest to the first crew activity structure 5 and the fourth tank 3D closest to the second crew activity structure 5,
  • the vent mast 9 is configured as a manual venting vent mast 9M.
  • the vent mast 9 of the second tank 3B may be configured as a manual venting vent mast 9M.
  • the structure 5 for occupant activities includes a structure for occupant accommodation and other living rooms
  • the tanks located at both ends of the tank row L that are closest to the structure 5 for occupant activities Among the tanks 3 other than 3 it is preferable that the vent mast 9 of the tank 3 on the front and rear opposite side of the passenger accommodation structure is made into a manual vent vent mast 9M.
  • manual venting is a stage before the gas is automatically discharged when the internal pressure of the tank 3 reaches the set pressure of the safety valve, and the gas is discharged by manually operating the valve connected to the vent mast 9 as appropriate. It means doing the following.
  • "configured as a vent mast 9M for manual venting” means, for example, a pipe for manual venting that is provided with the above-mentioned connection valve from the tank 3 so that manual venting is possible. 11 is connected.
  • Such a manual vent pipe 11 may be extended from each of the plurality of tanks 3 to the manual vent mast 9M, or if common pipes 13 and 15 described below are provided, The common pipes 13 and 15 may be extended to the manual venting vent mast 9M.
  • manual venting between the inner tank and the outer and outer tanks can be performed from the manual venting vent mast 9M.
  • FIG. 2 shows a first individual pipe 17 connected to the first part 3a of the tank 3 and a second individual pipe 19 connected to the second part 3b as an example of a plurality of individual pipes.
  • the first individual pipe 17 is a pipe connected to the internal space of the inner tank
  • the second individual pipe 19 is a pipe connected to the inner tank space.
  • the plurality of first individual pipes 17 are connected to the first common pipe 13, and the plurality of second individual pipes 19 are connected to the second common pipe 15.
  • each individual pipe 17, 19 extends from each tank 3 in a direction substantially perpendicular to the ship length direction.
  • Each common pipe 13, 15 extends in a direction substantially parallel to the longitudinal direction X.
  • the above-mentioned manual vent pipe 11 is connected to the first common pipe 13.
  • the arrangement order of the plurality of individual pipes 17 and 19 in each tank 3 is symmetrical with respect to the center of the tank row L in the longitudinal direction. That is, in each tank 3 arranged in front of the center of the tank row L in the longitudinal direction X, in this example, the first tank 3A and the second tank 3B, the first individual pipe 17, the 2 individual pipes 19 are arranged in this order, whereas each tank 3 arranged on the rear side of the center of the tank row L in the longitudinal direction X, in this example, the third tank 3C and the fourth tank 3D, The first individual pipe 17 and the second individual pipe 19 are arranged in this order from the rear side along the X direction.
  • connection parts 3a, 3b and the number of individual pipes in the tank 3 described above are only examples, and the individual pipes may be connected to parts different from this example depending on the structure of the tank 3.
  • the number of individual pipes may be three or more. Further, it is not essential that the arrangement order of the individual pipes 17 and 19 be symmetrical with respect to the center of the tank row L in the longitudinal direction.
  • FIG. 1 shows an independent tank 3 formed independently of the hull 21 as an example of the tank 3, the structure of the tank 3 is not limited to this example, and any type of tank may be used. It's fine.
  • the tank 3 may be a type of tank that is formed integrally with the hull.
  • the heat insulation structure of the tank 3 is not limited to the illustrated double structure, but may be a single layer structure, or a triple or more multilayer structure.
  • the shape of the tank 3 is not limited to the spherical shape shown in FIG.
  • the number of tanks 3 constituting the tank row L may be two or more, and is not limited to the illustrated four.
  • the liquefied gas storage ship S was explained as an example of the "offshore liquefied gas storage facility," but the “offshore liquefied gas storage facility” refers to offshore facilities in general that have the function of storing liquefied gas. It is not limited to gas storage vessels, but also includes offshore equipment without propulsion equipment.
  • the shape of the offshore liquefied gas storage facility is not particularly limited, it is preferable that the configuration according to this embodiment is applied to a facility that has an elongated shape in plan view, such as the illustrated ship.
  • the "bow" and “stern” of the ship are defined as the extension line along the line direction of the tank row L from both ends of the tank row L in the equipment. corresponds to each end at
  • the vent masts 9 are arranged near the center of the tank row L in the tanks 3 arranged at both ends of the tank row L, the vent masts 9 While maintaining an appropriate distance, it is possible to secure a wide activity area for the crew at the bow and stern. Thereby, in the liquefied gas storage ship S, it becomes possible to simplify the arrangement structure on the ship and make effective use of space.
  • the offshore liquefied gas storage facility further includes a front crew activity structure 5F provided in front of the tank row L, and a rear crew activity structure 5R provided at the rear of the tank row L. may be provided.
  • the activity area for the crew on the ship can be secured at a position where an appropriate distance is maintained from the vent mast 9.
  • the crew's activity areas into the bow area FR and the stern area RR, it becomes possible to simplify the onboard arrangement and make effective use of space.
  • the vent masts 9 provided in the tanks 3 other than the tanks 3 arranged at the front end and the tanks 3 arranged at the rear end in the tank row L are vents for manual venting. It may be configured as a mast 9M. According to this configuration, the manual vent mast 9, which is used more frequently than other vent masts 9, can be placed at an appropriate distance from both the bow area FR and the stern area RR.
  • each vent mast 9 is located near the center in the longitudinal direction It may be provided at a certain position. According to this configuration, the vent masts 9 of the tanks 3 other than the front and rear end tanks 3 can also be arranged at a position as far away as possible from the bow area FR and the stern area RR.
  • the offshore liquefied gas storage facility further includes a plurality of individual pipes connected to different parts of each tank 3, and the arrangement order of the plurality of individual pipes in each tank 3 is in the longitudinal direction of the tank row L. It may be symmetrical about the X center. According to this configuration, the structure of the entire piping is simplified, and the piping design work can be made more efficient.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Provided is an offshore liquefied gas storage facility (S), which comprises: a floating body (1); a tank row (L) comprising a plurality of tanks (3) for storing liquefied gas, the tanks being installed side by side in a prescribed direction (X) on the floating body (1); and a vent mast (9) provided to each of the tanks (3). The offshore liquefied gas storage facility, wherein in a tank (3) disposed at one end of the tank row (L) and a tank (3) disposed at the other end, the vent masts (9) are each disposed at a position near the center of the tank row (L) in the prescribed direction (X), using the central position of each tank (3) in the prescribed direction as a reference.

Description

洋上液化ガス貯蔵設備Offshore liquefied gas storage facility
　本開示は、洋上液化ガス貯蔵設備に関する。 The present disclosure relates to offshore liquefied gas storage equipment.
　液化ガス運搬船のような洋上液化ガス貯蔵設備には、一般的に、液化ガスを貯蔵するタンクの圧力を適切に保つため、ガス排出用のベントマストが設置される（例えば、特許文献１参照。）。また、国際規則によっても、貨物タンクにガス排出用のベントマストを設置することが義務付けられているとともに、ベントマストを乗員の居住区域および業務区域から所定距離以上離して設置することとされている。 Offshore liquefied gas storage facilities such as liquefied gas carriers are generally equipped with vent masts for gas discharge in order to maintain appropriate pressure in tanks that store liquefied gas (see, for example, Patent Document 1). ). Furthermore, international regulations require that cargo tanks be equipped with vent masts for gas discharge, and that vent masts must be installed at least a specified distance from crew living and work areas. .
特開２０２１－１８５０５６号公報JP 2021-185056 Publication
　他方で、乗員の活動エリアである居住区域や業務区域は、船首区域または船尾区域に設置することが、洋上設備上の各種構造物の配置の簡素化やスペースの有効利用の点で便宜である。したがって、洋上設備上の限られたスペース内で、このような乗員の活動エリアをできるだけ広く確保しながら、ベントマストを活動エリアから適切な距離を空けて配置することが望ましい。 On the other hand, it is convenient to install the living and work areas, which are the activity areas of the crew, in the bow or stern area, in terms of simplifying the arrangement of various structures on the offshore equipment and making effective use of space. . Therefore, it is desirable to arrange the vent mast at an appropriate distance from the activity area while ensuring as wide an activity area as possible for the crew within the limited space on the offshore facility.
　本開示の目的は、上記の課題を解決するために、洋上液化ガス貯蔵設備において、設備上の配置構造の簡素化およびスペースの有効利用を可能にするベントマストの配置構成を提供することにある。 In order to solve the above-mentioned problems, an object of the present disclosure is to provide a vent mast arrangement in an offshore liquefied gas storage facility that enables simplification of the arrangement on the equipment and effective use of space. .
　上記目的を達成するために、本開示に係る洋上液化ガス貯蔵設備は、
浮体と、
　前記浮体に、所定方向に並べて設置された、複数の液化ガスを貯蔵するタンクからなるタンク列と、
　各タンクにまたは当該タンクを覆うタンクカバー設けられたベントマストと、
を備え、
　前記タンク列の前端に配置されたタンクおよび後端に配置されたタンクにおいて、各ベントマストが、当該タンクの前記所定方向の中央位置を基準として、前記所定方向における前記タンク列の中央寄りの位置に設けられている。 In order to achieve the above object, the offshore liquefied gas storage facility according to the present disclosure includes:
floating body and
a tank row consisting of a plurality of tanks for storing liquefied gas installed in a predetermined direction on the floating body;
a vent mast provided with a tank cover on or over each tank;
Equipped with
In a tank arranged at the front end and a tank arranged at the rear end of the tank row, each vent mast is located at a position closer to the center of the tank row in the predetermined direction with respect to the center position of the tank in the predetermined direction. It is set in.
　請求の範囲および／または明細書および／または図面に開示された少なくとも２つの構成のどのような組合せも、本開示に含まれる。特に、請求の範囲の各請求項の２つ以上のどのような組合せも、本開示に含まれる。 Any combination of at least two features disclosed in the claims and/or the specification and/or drawings is included in the present disclosure. In particular, any combination of two or more of each of the following claims is included in the present disclosure.
　本開示は、添付の図面を参考にした以下の好適な実施形態の説明から、より明瞭に理解されるであろう。しかしながら、実施形態および図面は単なる図示および説明のためのものであり、本開示の範囲を定めるために利用されるべきものではない。本開示の範囲は添付の請求の範囲によって定まる。添付図面において、複数の図面における同一の符号は、同一または相当する部分を示す。
本開示の一実施形態に係る洋上液化ガス貯蔵設備の概略構成を示す側面図である。 図１の洋上液化ガス貯蔵設備の概略構成を示す平面図である。 The present disclosure will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings. However, the embodiments and drawings are merely for illustration and explanation and should not be used to define the scope of the present disclosure. The scope of the disclosure is defined by the appended claims. In the accompanying drawings, the same reference numerals in multiple drawings indicate the same or corresponding parts.
FIG. 1 is a side view showing a schematic configuration of an offshore liquefied gas storage facility according to an embodiment of the present disclosure. FIG. 2 is a plan view showing a schematic configuration of the offshore liquefied gas storage facility shown in FIG. 1. FIG.
　以下、本開示の好ましい実施形態について図面を参照しながら説明する。図１に本開示の一実施形態に係る洋上液化ガス貯蔵設備の一例である液化ガス貯蔵船Ｓを示す。この液化ガス貯蔵船Ｓは、浮体である船体１と、船体１に設置された液化ガスを貯蔵する複数、この例では４つのタンク３を備えている。 Hereinafter, preferred embodiments of the present disclosure will be described with reference to the drawings. FIG. 1 shows a liquefied gas storage ship S that is an example of offshore liquefied gas storage equipment according to an embodiment of the present disclosure. This liquefied gas storage ship S includes a floating hull 1 and a plurality of tanks 3 (four in this example) installed in the hull 1 for storing liquefied gas.
　本明細書において「液化ガス貯蔵船」とは、液化ガスを貯蔵する機能を有する船舶を指す。本実施形態における液化ガス貯蔵船Ｓは液化ガス運搬船である。液化ガス運搬船以外にも、例えば液化ガス燃料船や、液化ガスを他の船舶に供給するバンカリング船等が液化ガス貯蔵船Ｓに含まれる。 As used herein, the term "liquefied gas storage ship" refers to a ship that has the function of storing liquefied gas. The liquefied gas storage ship S in this embodiment is a liquefied gas carrier ship. In addition to liquefied gas carriers, the liquefied gas storage ships S include, for example, liquefied gas fuel ships, bunkering ships that supply liquefied gas to other ships, and the like.
　図２に示すように、複数のタンク３は、その中心が所定方向に沿って平面視で直線状に並ぶように配置されている。具体的には、この例では、複数のタンク３は、上記の「所定方向」である液化ガス貯蔵船Ｓの船長方向Ｘに沿って並べられている。本明細書では、このように配列された複数のタンク３からなる列を「タンク列Ｌ」と呼ぶ。また、上記所定方向の一端側および他端側を、便宜上、液化ガス貯蔵船Ｓの進行方向を基準としてそれぞれ「前」，「後」と呼ぶ。また、必要に応じて、タンク列Ｌを構成する複数のタンク３の各々を、前側のタンクから順に第１タンク３Ａ，第２タンク３Ｂ，第３タンク３Ｃおよび第４タンク３Ｄと呼ぶ場合がある。 As shown in FIG. 2, the plurality of tanks 3 are arranged so that their centers are lined up in a straight line in a plan view along a predetermined direction. Specifically, in this example, the plurality of tanks 3 are arranged along the longitudinal direction X of the liquefied gas storage ship S, which is the above-mentioned "predetermined direction". In this specification, a row consisting of a plurality of tanks 3 arranged in this manner is referred to as a "tank row L." Further, for convenience, one end side and the other end side in the predetermined direction are respectively referred to as "front" and "rear" with respect to the traveling direction of the liquefied gas storage ship S. Furthermore, as necessary, each of the plurality of tanks 3 constituting the tank row L may be called, in order from the front tank, a first tank 3A, a second tank 3B, a third tank 3C, and a fourth tank 3D. .
　タンク３に貯蔵される液化ガスは、例えば、液化アンモニア（ＬＮＨ３、約－３３℃）、液化石油ガス（ＬＰＧ、約－４５℃）、液化エチレンガス（ＬＥＧ、約－１００℃）、液化天然ガス（ＬＮＧ、約－１６０℃）、液化水素（ＬＨ2、約－２５０℃）、液化ヘリウム（ＬＨｅ、約－２７０℃）である。本実施形態では、タンク３に液化水素が貯蔵される。 The liquefied gases stored in the tank 3 include, for example, liquefied ammonia (LNH 3 , approximately -33°C), liquefied petroleum gas (LPG, approximately -45°C), liquefied ethylene gas (LEG, approximately -100°C), and liquefied natural gas. gas (LNG, approximately -160°C), liquefied hydrogen (LH 2 , approximately -250°C), and liquefied helium (LHe, approximately -270°C). In this embodiment, liquefied hydrogen is stored in the tank 3.
　本実施形態におけるタンク３は、内槽および外槽を有する二重殻タンクとして構成されている。このタンク３は、断熱層である内外槽間空間に液化ガスの気化ガスを封入した状態で定常運用される。もっとも、タンク３の防熱方式はこの例に限定されず、例えば内外槽間空間を真空層としてもよい。 The tank 3 in this embodiment is configured as a double shell tank having an inner tank and an outer tank. This tank 3 is normally operated in a state in which vaporized gas of liquefied gas is sealed in the space between the inner and outer tanks, which is a heat insulating layer. However, the heat insulation method for the tank 3 is not limited to this example, and for example, the space between the inner and outer tanks may be made into a vacuum layer.
　本実施形態に係る液化ガス貯蔵船Ｓは、この液化ガス貯蔵船Ｓの乗員が活動するための構造物（以下、「乗員活動用構造物」という。）５を備える。本明細書において、「乗員活動用構造物５」とは、乗員が立ち入って何らかの活動をすることが予定されている構造物全般を指し、乗員が船上での生活に使う居住用構造物のほか、例えば乗員が当該液化ガス貯蔵船Ｓの航行、運用を行うために立ち入る貨物機械室のような作業用構造物が「乗員活動用構造物５」に含まれる。図示の例では、液化ガス貯蔵船Ｓは、タンク列Ｌの前方の船首区域ＦＲに設けられた前側乗員活動用構造物５Ｆと、タンク列Ｌの後方の船尾区域ＲＲに設けられた後側乗員活動用構造物５Ｒとを備える。具体的には、本実施形態では、前側乗員活動用構造物５Ｆは居住用構造物として構成され、後側乗員活動用構造物５Ｒは作業用構造物として構成されている。これらの乗員活動用構造物５は液化ガス貯蔵船Ｓの甲板７（図１）上に設置されている。本実施形態では、タンク列Ｌの途中には乗員活動用構造物５を設けない。 The liquefied gas storage ship S according to the present embodiment includes a structure 5 for the crew members of the liquefied gas storage ship S to perform activities (hereinafter referred to as "crew activity structure"). In this specification, "crew activity structure 5" refers to all structures in which crew members are expected to enter and engage in some kind of activity, including residential structures used by crew members to live on board the ship. For example, the "crew activity structure 5" includes a work structure such as a cargo machine room that the crew enters in order to navigate and operate the liquefied gas storage ship S. In the illustrated example, the liquefied gas storage ship S has a front crew activity structure 5F provided in the bow area FR in front of the tank row L, and a rear crew activity structure 5F provided in the stern area RR behind the tank row L. It also includes an activity structure 5R. Specifically, in this embodiment, the front occupant activity structure 5F is configured as a residential structure, and the rear occupant activity structure 5R is configured as a work structure. These crew activity structures 5 are installed on the deck 7 (FIG. 1) of the liquefied gas storage ship S. In this embodiment, the crew activity structure 5 is not provided in the middle of the tank row L.
　なお、液化ガス貯蔵船Ｓに前側乗員活動用構造物５Ｆおよび後側乗員活動用構造物５Ｒを設ける場合、前側乗員活動用構造物５Ｆを居住用構造物とし、後側乗員活動用構造物５Ｒを作業用構造物として構成することは一例にすぎず、これらを各々どのような種類の乗員活動用構造物５とするかは任意である。もっとも、居住用構造物をタンク列Ｌの後方に設置した場合、タンク３やその付属機器によって居住用構造物からの視界が遮られる場合があるので、前側乗員活動用構造物５Ｆを居住用構造物とすることが好ましい。また、作業用構造物が貨物機械室である場合、これを、通常ガス処理設備が配置される後部の機関室の近くに配置した方がガス配管を短くすることができるので、後側乗員活動用構造物５Ｒを貨物機械室とすることが好ましい。 In addition, when the liquefied gas storage ship S is provided with a front crew activity structure 5F and a rear crew activity structure 5R, the front crew activity structure 5F is a residential structure, and the rear crew activity structure 5R is Configuring these as working structures is only one example, and it is arbitrary what type of occupant activity structure 5 they are made into. However, if a residential structure is installed behind tank row L, the view from the residential structure may be obstructed by tank 3 and its attached equipment, so front passenger activity structure 5F should be placed behind the residential structure. It is preferable to make it a physical object. In addition, if the work structure is a cargo machinery room, it is better to locate it near the rear engine room where gas processing equipment is normally located, so that the gas piping can be shortened, making it easier for the rear crew to operate the cargo machinery room. It is preferable that the storage structure 5R is a cargo machine room.
　各タンク３は、その上部がタンクカバー８によって覆われている。この例では、タンクカバーは各タンク３の上部の形状に対応した形状を有している。もっとも、タンクカバーの形状はこの例に限定されず、例えば、タンク列Ｌ全体を覆う形状であってもよい。 The upper part of each tank 3 is covered by a tank cover 8. In this example, the tank cover has a shape corresponding to the shape of the upper part of each tank 3. However, the shape of the tank cover is not limited to this example, and may have a shape that covers the entire tank row L, for example.
　本実施形態では、各タンク３のタンクカバー８上に、タンク３内で発生した気化ガスを、タンク３よりも高い位置から大気中へ放出するガス放出塔であるベントマスト９が設けられている。各タンク３には、安全弁が設けられており、タンク３内部のガス圧力が安全弁の設定圧に達した場合に、ベントマスト９からガスが放出される。 In this embodiment, a vent mast 9 is provided on the tank cover 8 of each tank 3, which is a gas release tower that releases vaporized gas generated in the tank 3 into the atmosphere from a position higher than the tank 3. . Each tank 3 is provided with a safety valve, and when the gas pressure inside the tank 3 reaches the set pressure of the safety valve, gas is released from the vent mast 9.
　なお、タンクカバー８が複数のタンク３に対して一体的に覆う形状である場合、ベントマスト９が各タンクのタンクカバー８上に設けられているとは、各ベントマスト９が、平面視において当該タンクカバー８の各タンク３と重なる部分に設けられていることを意味する。なお、ベントマスト９は各タンクに直接設けられていてもよい。また、タンクカバー８は省略してもよい。以下では、ベントマスト９の位置について説明する場合、便宜上、各タンク９のタンクカバー８に設けられたベントマスト９であっても、「タンク９に設けられたベントマスト９」のように表現する場合がある。 In addition, when the tank cover 8 has a shape that integrally covers a plurality of tanks 3, the fact that the vent mast 9 is provided on the tank cover 8 of each tank means that each vent mast 9 is This means that it is provided in a portion of the tank cover 8 that overlaps each tank 3. Note that the vent mast 9 may be provided directly on each tank. Further, the tank cover 8 may be omitted. In the following, when explaining the position of the vent mast 9, for convenience, even if the vent mast 9 is provided on the tank cover 8 of each tank 9, it will be expressed as "the vent mast 9 provided on the tank 9". There are cases.
　本実施形態では、タンク列Ｌの一端（この例では前端）および他端（この例では後端）に配置されたタンク３、この例では第１タンク３Ａおよび第４タンク３Ｄにおいて、各ベントマスト９が、当該タンク３の船長方向Ｘの中央位置を基準として、船長方向Ｘにおけるタンク列Ｌの中央寄りの位置に設けられている。より具体的には、本実施形態では、タンク列Ｌの中央よりも前側に配置されたタンク３、この例では第１タンク３Ａおよび第２タンク３Ｂ、およびタンク列Ｌの後側に配置されたタンク３、この例では第３タンク３Ｃおよび第４タンク３Ｄにおいて、各ベントマスト９が、船長方向Ｘにおけるタンク列Ｌの中央寄りの位置に設けられている。言い換えると、各タンク３における「船長方向Ｘにおけるタンク列Ｌの中央寄りの位置」とは、各タンク３の船長方向Ｘの中央位置を基準として、タンク列Ｌの中央よりも前側に配置されたタンク３については後方の位置を意味し、タンク列Ｌの中央よりも後側に配置されたタンク３については前方の位置を意味する。また、「タンク列Ｌの中央」とは、船長方向Ｘにおける前端に配置されたタンク３の前端と後端に配置されたタンク３の後端との間の中央位置を意味する。なお、以下の説明では、このようなベントマスト９の位置を、単に「中央寄りの位置」等と表現する場合がある。 In this embodiment, in the tanks 3 arranged at one end (front end in this example) and the other end (rear end in this example) of the tank row L, in this example the first tank 3A and the fourth tank 3D, each vent mast 9 is provided at a position closer to the center of the tank row L in the longitudinal direction X with reference to the center position of the tank 3 in the longitudinal direction X. More specifically, in this embodiment, the tanks 3 are arranged in front of the center of the tank row L, in this example, the first tank 3A and the second tank 3B, and the tanks 3 are arranged in the rear side of the tank row L. In the tanks 3, in this example, the third tank 3C and the fourth tank 3D, each vent mast 9 is provided at a position closer to the center of the tank row L in the ship length direction X. In other words, the "position near the center of the tank row L in the ship's ship direction For the tank 3, this means the rear position, and for the tank 3 arranged on the rear side of the center of the tank row L, it means the front position. Moreover, "the center of the tank row L" means the center position between the front end of the tank 3 arranged at the front end in the longitudinal direction X and the rear end of the tank 3 arranged at the rear end. In addition, in the following description, such a position of the vent mast 9 may be simply expressed as "a position near the center" or the like.
　より具体的には、図示の例では、各タンク３の幅方向Ｗの中央を通るタンク列Ｌの中心線Ｃ上に、各ベントマスト９が配置されている。このように配置することにより、各ベントマスト９をより中央寄りの位置に配置することができる。もっとも、ベントマスト９はタンク列Ｌの中心線Ｃ上からずれた位置に配置されていてもよい。 More specifically, in the illustrated example, each vent mast 9 is arranged on the center line C of the tank row L passing through the center of each tank 3 in the width direction W. By arranging in this manner, each vent mast 9 can be arranged closer to the center. However, the vent mast 9 may be arranged at a position shifted from the center line C of the tank row L.
　タンク列Ｌの前端に配置された第１タンク３Ａおよび後端に配置された第４タンク３Ｄ以外のタンク３については、ベントマスト９が各タンク３における船長方向Ｘの中央寄りの位置に配置されていることは必須ではない。もっとも、これらのタンク３のベントマスト９も船長方向Ｘの中央寄りの位置に配置することにより、船首区域ＦＲおよび船尾区域ＲＲから可及的に離れた位置に配置することができる。なお、図示の例と異なり、タンク列Ｌが奇数個のタンク３によって構成されている場合、タンク列Ｌの中央に配置されたタンク３については、ベントマスト９の位置は特に限定されない。 For the tanks 3 other than the first tank 3A arranged at the front end of the tank row L and the fourth tank 3D arranged at the rear end, the vent mast 9 is arranged at a position closer to the center of each tank 3 in the longitudinal direction X. It is not necessary to be present. However, by arranging the vent masts 9 of these tanks 3 at a position closer to the center in the ship's vessel direction X, they can be arranged as far away from the bow area FR and the stern area RR as possible. Note that, unlike the illustrated example, when the tank row L is constituted by an odd number of tanks 3, the position of the vent mast 9 for the tank 3 disposed at the center of the tank row L is not particularly limited.
　また、本実施形態では、タンク列Ｌにおける、乗員活動用構造物５に最も近いタンク３Ａ，３Ｄ以外のタンク３Ｂ，３Ｃに設けられたベントマスト９が、マニュアルベント用ベントマスト９Ｍとして構成されている。すなわち、図示の例では、第１乗員活動用構造物５に最も近い第１タンク３Ａ以外および第２乗員活動用構造物５に最も近い第４タンク３Ｄ以外のタンク３である第３タンク３Ｃのベントマスト９が、マニュアルベント用ベントマスト９Ｍとして構成されている。この例と異なり、第２タンク３Ｂのベントマスト９がマニュアルベント用ベントマスト９Ｍとして構成されていてもよい。もっとも、本実施形態のように、乗員活動用構造物５として乗員居住用構造物とそれ以外の居室が設けられる場合、乗員活動用構造物５に最も近い、タンク列Ｌの両端に位置するタンク３以外のタンク３のうち、乗員居住用構造物と前後反対側のタンク３のベントマスト９をマニュアルベント用ベントマスト９Ｍとすることが好ましい。 Further, in this embodiment, the vent masts 9 provided in the tanks 3B and 3C other than the tanks 3A and 3D closest to the crew activity structure 5 in the tank row L are configured as manual vent vent masts 9M. There is. That is, in the illustrated example, the third tank 3C, which is the tank 3 other than the first tank 3A closest to the first crew activity structure 5 and the fourth tank 3D closest to the second crew activity structure 5, The vent mast 9 is configured as a manual venting vent mast 9M. Unlike this example, the vent mast 9 of the second tank 3B may be configured as a manual venting vent mast 9M. However, as in this embodiment, when the structure 5 for occupant activities includes a structure for occupant accommodation and other living rooms, the tanks located at both ends of the tank row L that are closest to the structure 5 for occupant activities Among the tanks 3 other than 3, it is preferable that the vent mast 9 of the tank 3 on the front and rear opposite side of the passenger accommodation structure is made into a manual vent vent mast 9M.
　なお、マニュアルベントとは、タンク３内圧力が安全弁の設定圧に達したことにより自動でガス排出がなされる前の段階で、適宜ベントマスト９への接続弁を手動で操作することによりガス排出を行うことをいう。また、本明細書において、「マニュアルベント用ベントマスト９Ｍとして構成されている」とは、マニュアルベントが可能となるよう、例えば、タンク３から、上記の接続弁が設けられたマニュアルベント用の配管１１が接続されていることをいう。このようなマニュアルベント用の配管１１は、複数のタンク３の各々からマニュアルベント用ベントマスト９Ｍへ延設されていてもよいし、後述する共通配管１３，１５が設けられている場合には、共通配管１３，１５からマニュアルベント用ベントマスト９Ｍへ延設されていてもよい。本実施形態で例示した二重殻のタンク３の場合、内槽および内外槽間のマニュアルベントをマニュアルベント用ベントマスト９Ｍから行うことができる。 Note that manual venting is a stage before the gas is automatically discharged when the internal pressure of the tank 3 reaches the set pressure of the safety valve, and the gas is discharged by manually operating the valve connected to the vent mast 9 as appropriate. It means doing the following. In addition, in this specification, "configured as a vent mast 9M for manual venting" means, for example, a pipe for manual venting that is provided with the above-mentioned connection valve from the tank 3 so that manual venting is possible. 11 is connected. Such a manual vent pipe 11 may be extended from each of the plurality of tanks 3 to the manual vent mast 9M, or if common pipes 13 and 15 described below are provided, The common pipes 13 and 15 may be extended to the manual venting vent mast 9M. In the case of the double shell tank 3 exemplified in this embodiment, manual venting between the inner tank and the outer and outer tanks can be performed from the manual venting vent mast 9M.
　各タンク３には、各種配管が接続されている。本実施形態では、各タンク３の異なる部分に接続された複数の個別配管を備えている。図２では、複数の個別配管の例として、タンク３の第１の部分３ａに接続された第１個別配管１７と、第２の部分３ｂに接続された第２個別配管１９とを示している。上述のように二重殻タンクとして構成されている本実施形態に係るタンク３では、例えば、第１個別配管１７は内槽内空間に接続された配管であり、第２個別配管１９は内外槽間空間に接続された配管である。複数の第１個別配管１７は第１共通配管１３に接続されており、複数の第２個別配管１９は第２共通配管１５に接続されている。図示の例では、各個別配管１７，１９は各タンク３から船長方向Ｘにほぼ垂直な方向に延びている。各共通配管１３，１５は船長方向Ｘにほぼ平行な方向に延びている。なお、この例では、上述のマニュアルベント用配管１１は第１共通配管１３に接続されている。 Various types of piping are connected to each tank 3. This embodiment includes a plurality of individual pipes connected to different parts of each tank 3. FIG. 2 shows a first individual pipe 17 connected to the first part 3a of the tank 3 and a second individual pipe 19 connected to the second part 3b as an example of a plurality of individual pipes. . In the tank 3 according to the present embodiment configured as a double shell tank as described above, for example, the first individual pipe 17 is a pipe connected to the internal space of the inner tank, and the second individual pipe 19 is a pipe connected to the inner tank space. This is piping connected to the interspace. The plurality of first individual pipes 17 are connected to the first common pipe 13, and the plurality of second individual pipes 19 are connected to the second common pipe 15. In the illustrated example, each individual pipe 17, 19 extends from each tank 3 in a direction substantially perpendicular to the ship length direction. Each common pipe 13, 15 extends in a direction substantially parallel to the longitudinal direction X. In addition, in this example, the above-mentioned manual vent pipe 11 is connected to the first common pipe 13.
　同図に示すように、本実施形態では、各タンク３における複数の個別配管１７，１９の配置順が、タンク列Ｌの船長方向Ｘ中央に対して対称である。すなわち、タンク列Ｌの船長方向Ｘ中央よりも前側に配置された各タンク３、この例では第１タンク３Ａおよび第２タンク３Ｂでは、船長方向Ｘに沿って前側から第１個別配管１７、第２個別配管１９の順に配置されているのに対し、タンク列Ｌの船長方向Ｘ中央よりも後側に配置された各タンク３、この例では第３タンク３Ｃおよび第４タンク３Ｄでは、船長方向Ｘに沿って後側から第１個別配管１７、第２個別配管１９の順に配置されている。 As shown in the figure, in this embodiment, the arrangement order of the plurality of individual pipes 17 and 19 in each tank 3 is symmetrical with respect to the center of the tank row L in the longitudinal direction. That is, in each tank 3 arranged in front of the center of the tank row L in the longitudinal direction X, in this example, the first tank 3A and the second tank 3B, the first individual pipe 17, the 2 individual pipes 19 are arranged in this order, whereas each tank 3 arranged on the rear side of the center of the tank row L in the longitudinal direction X, in this example, the third tank 3C and the fourth tank 3D, The first individual pipe 17 and the second individual pipe 19 are arranged in this order from the rear side along the X direction.
　タンク列Ｌの各タンク３において複数の個別配管をこのように配置することにより、配管全体の構造が簡素化され、配管の設計作業を効率化できる。なお、上述した個別配管のタンク３における接続部分３ａ，３ｂや数は一例に過ぎず、個別配管はタンク３の構造に応じてこの例とは異なる部分に接続されるものであってよく、また個別配管の数は３つ以上であってよい。また、個別配管１７，１９の配置順を、タンク列Ｌの船長方向Ｘ中央に対して対称とすることは必須ではない。 By arranging a plurality of individual pipes in each tank 3 of the tank row L in this manner, the structure of the entire pipe is simplified, and the pipe design work can be made more efficient. Note that the connection parts 3a, 3b and the number of individual pipes in the tank 3 described above are only examples, and the individual pipes may be connected to parts different from this example depending on the structure of the tank 3. The number of individual pipes may be three or more. Further, it is not essential that the arrangement order of the individual pipes 17 and 19 be symmetrical with respect to the center of the tank row L in the longitudinal direction.
　なお、図１には、タンク３の一例として、船体２１とは独立に形成される独立型のタンク３を示したが、タンク３の構成はこの例に限定されず、いかなるタイプのタンクであってよい。例えば、タンク３は、船体と一体に形成されるタイプのタンクであってよい。また、タンク３の防熱構造はタンク３は例示した二重構造に限定されず、一重構造であってもよく、三重以上の多重構造であってよい。また、タンク３の形状は、図１に示した球形に限定されない。タンク列Ｌを構成するタンク３の数は、２個以上であればよく、例示した４個に限定されない。 Although FIG. 1 shows an independent tank 3 formed independently of the hull 21 as an example of the tank 3, the structure of the tank 3 is not limited to this example, and any type of tank may be used. It's fine. For example, the tank 3 may be a type of tank that is formed integrally with the hull. Further, the heat insulation structure of the tank 3 is not limited to the illustrated double structure, but may be a single layer structure, or a triple or more multilayer structure. Furthermore, the shape of the tank 3 is not limited to the spherical shape shown in FIG. The number of tanks 3 constituting the tank row L may be two or more, and is not limited to the illustrated four.
　なお、上記実施形態では、「洋上液化ガス貯蔵設備」として液化ガス貯蔵船Ｓを例として説明したが、「洋上液化ガス貯蔵設備」は液化ガスを貯蔵する機能を有する洋上設備一般を指し、液化ガス貯蔵船に限らず、推進装置を備えない洋上設備も含む。洋上液化ガス貯蔵設備の形状は特に限定されないが、本実施形態に係る構成は、例示した船舶のような、平面視で細長い形状を有する設備に適用することが好ましい。本実施形態に係る構成を船舶以外の洋上設備に適用する場合、船舶についての「船首」，「船尾」は、当該設備における、タンク列Ｌ両端から、タンク列Ｌの並び方向に沿った延長線上にある各端部に相当する。 In the above embodiment, the liquefied gas storage ship S was explained as an example of the "offshore liquefied gas storage facility," but the "offshore liquefied gas storage facility" refers to offshore facilities in general that have the function of storing liquefied gas. It is not limited to gas storage vessels, but also includes offshore equipment without propulsion equipment. Although the shape of the offshore liquefied gas storage facility is not particularly limited, it is preferable that the configuration according to this embodiment is applied to a facility that has an elongated shape in plan view, such as the illustrated ship. When applying the configuration according to this embodiment to offshore equipment other than a ship, the "bow" and "stern" of the ship are defined as the extension line along the line direction of the tank row L from both ends of the tank row L in the equipment. corresponds to each end at
　以上説明した本実施形態に係る洋上液化ガス貯蔵設備によれば、タンク列Ｌの両端に配置されたタンク３においてベントマスト９がタンク列Ｌの中央寄りに配置されているので、ベントマスト９から適切な距離を保ったうえで、船首および船尾部分に乗員の活動エリアを広く確保することができる。これにより、液化ガス貯蔵船Ｓにおいて、船上の配置構造の簡素化およびスペースの有効利用が可能になる。 According to the offshore liquefied gas storage facility according to the present embodiment described above, since the vent masts 9 are arranged near the center of the tank row L in the tanks 3 arranged at both ends of the tank row L, the vent masts 9 While maintaining an appropriate distance, it is possible to secure a wide activity area for the crew at the bow and stern. Thereby, in the liquefied gas storage ship S, it becomes possible to simplify the arrangement structure on the ship and make effective use of space.
　本実施形態に係る洋上液化ガス貯蔵設備において、さらに、タンク列Ｌの前方に設けられた前側乗員活動用構造物５Ｆと、タンク列Ｌの後方に設けられた後側乗員活動用構造物５Ｒとを備えていてもよい。この構成によれば、船上における乗員の活動エリアが、ベントマスト９から適切な距離が保たれた位置に確保できる。また、乗員の活動エリアを船首区域ＦＲおよび船尾区域ＲＲにまとめることにより、船上の配置構造の簡素化およびスペースの有効利用が可能になる。 The offshore liquefied gas storage facility according to this embodiment further includes a front crew activity structure 5F provided in front of the tank row L, and a rear crew activity structure 5R provided at the rear of the tank row L. may be provided. According to this configuration, the activity area for the crew on the ship can be secured at a position where an appropriate distance is maintained from the vent mast 9. Furthermore, by organizing the crew's activity areas into the bow area FR and the stern area RR, it becomes possible to simplify the onboard arrangement and make effective use of space.
　本実施形態に係る洋上液化ガス貯蔵設備において、タンク列Ｌにおける、前端に配置されたタンク３および後端に配置されたタンク３以外のタンク３に設けられたベントマスト９が、マニュアルベント用ベントマスト９Ｍとして構成されていてもよい。この構成によれば、他のベントマスト９よりも使用頻度の高いマニュアル用ベントマスト９を、船首区域ＦＲおよび船尾区域ＲＲのいずれからも適切な距離を置いて配置することができる。 In the offshore liquefied gas storage facility according to the present embodiment, the vent masts 9 provided in the tanks 3 other than the tanks 3 arranged at the front end and the tanks 3 arranged at the rear end in the tank row L are vents for manual venting. It may be configured as a mast 9M. According to this configuration, the manual vent mast 9, which is used more frequently than other vent masts 9, can be placed at an appropriate distance from both the bow area FR and the stern area RR.
　本実施形態に係る洋上液化ガス貯蔵設備において、タンク列Ｌの中央よりも前側に配置されたタンク３および後側に配置されたタンク３において、各ベントマスト９が、船長方向Ｘの中央寄りの位置に設けられていてもよい。この構成によれば、前端および後端のタンク３以外のタンク３のベントマスト９も、船首区域ＦＲおよび船尾区域ＲＲから可及的に距離を空けた位置に配置することができる。 In the offshore liquefied gas storage facility according to the present embodiment, each vent mast 9 is located near the center in the longitudinal direction It may be provided at a certain position. According to this configuration, the vent masts 9 of the tanks 3 other than the front and rear end tanks 3 can also be arranged at a position as far away as possible from the bow area FR and the stern area RR.
　本実施形態に係る洋上液化ガス貯蔵設備において、さらに、各タンク３の異なる部分に接続された複数の個別配管を備え、各タンク３における複数の個別配管の配置順が、タンク列Ｌの船長方向Ｘ中央に対して対称であってもよい。この構成によれば、配管全体の構造が簡素化され、配管の設計作業を効率化できる。 The offshore liquefied gas storage facility according to the present embodiment further includes a plurality of individual pipes connected to different parts of each tank 3, and the arrangement order of the plurality of individual pipes in each tank 3 is in the longitudinal direction of the tank row L. It may be symmetrical about the X center. According to this configuration, the structure of the entire piping is simplified, and the piping design work can be made more efficient.
　以上のとおり、図面を参照しながら本開示の好適な実施形態を説明したが、本開示の趣旨を逸脱しない範囲内で、種々の追加、変更または削除が可能である。したがって、そのようなものも本開示の範囲内に含まれる。 As described above, the preferred embodiments of the present disclosure have been described with reference to the drawings, but various additions, changes, or deletions can be made without departing from the spirit of the present disclosure. Accordingly, such are also included within the scope of this disclosure.
１　船体（浮体）
３　タンク
５Ｆ　前側乗員活動用構造物（第１乗員活動用構造物）
５Ｒ　後側乗員活動用構造物（第２乗員活動用構造物）
８　タンクカバー
９　ベントマスト
９Ｍ　マニュアルベント用ベントマスト
１７　第１個別配管（個別配管）
１９　第２個別配管（個別配管）
Ｌ　タンク列
Ｓ　液化ガス貯蔵船
Ｘ　船長方向（所定方向） 1 Hull (floating body)
3 Tank 5F Front crew activity structure (first crew activity structure)
5R Rear crew activity structure (second crew activity structure)
8 Tank cover 9 Vent mast 9M Vent mast for manual vent 17 1st individual piping (individual piping)
19 Second individual piping (individual piping)
L Tank row S Liquefied gas storage ship X Captain direction (predetermined direction)

Claims (5)

  1. 　浮体と、
    　前記浮体に、所定方向に並べて設置された、複数の液化ガスを貯蔵するタンクからなるタンク列と、
    　各タンクまたは当該タンクを覆うタンクカバーに設けられたベントマストと、
    を備え、
    　前記タンク列の一端に配置されたタンクおよび他端に配置されたタンクにおいて、各ベントマストが、当該タンクの前記所定方向の中央位置を基準として、前記所定方向における前記タンク列の中央寄りの位置に設けられている、
    洋上液化ガス貯蔵設備。     floating body and
    a tank row consisting of a plurality of tanks for storing liquefied gas installed in a predetermined direction on the floating body;
    a vent mast provided on each tank or a tank cover covering the tank;
    Equipped with
    In a tank arranged at one end of the tank row and a tank arranged at the other end, each vent mast is located at a position closer to the center of the tank row in the predetermined direction with respect to the center position of the tank in the predetermined direction. is provided in
    Offshore liquefied gas storage facility.
  2. 　請求項１に記載の洋上液化ガス貯蔵設備において、さらに、
    　当該洋上液化ガス設備における前記一端側の区域に設けられた第１乗員活動用構造物と、
    　当該洋上液化ガス設備における前記他端側の区域に設けられた第２乗員活動用構造物と、
    を備える、洋上液化ガス貯蔵設備。     The offshore liquefied gas storage facility according to claim 1, further comprising:
    a first crew activity structure provided in the area on the one end side of the offshore liquefied gas facility;
    a second crew activity structure provided in the area on the other end side of the offshore liquefied gas facility;
    An offshore liquefied gas storage facility equipped with
  3. 　請求項１または２に記載の洋上液化ガス貯蔵設備において、
    　前記タンク列における、前記一端に配置されたタンクおよび前記他端に配置されたタンク以外のタンクまたは当該タンクを覆うタンクカバーに設けられた前記ベントマストが、マニュアルベント用ベントマストとして構成されている、
    洋上液化ガス貯蔵設備。     The offshore liquefied gas storage facility according to claim 1 or 2,
    In the tank row, the vent mast provided on a tank other than the tank arranged at the one end and the tank arranged at the other end or a tank cover covering the tank is configured as a manual venting vent mast. ,
    Offshore liquefied gas storage facility.
  4. 　請求項１から３のいずれか一項に記載の洋上液化ガス貯蔵設備において、
    　前記タンク列の中央よりも前記一端側に配置されたタンクおよび前記他端側に配置されたタンクにおいて、各ベントマストが、当該タンクの前記所定方向の中央位置を基準として、前記所定方向における前記タンク列の中央寄りの位置に設けられている、
    洋上液化ガス貯蔵設備。     The offshore liquefied gas storage facility according to any one of claims 1 to 3,
    In the tanks arranged on the one end side and the tanks arranged on the other end side with respect to the center of the tank row, each vent mast is configured to Located near the center of the tank row,
    Offshore liquefied gas storage facility.
  5. 　請求項４に記載の洋上液化ガス貯蔵設備において、さらに、
    　各タンクの異なる部分に接続された複数の個別配管を備え、
    　各タンクにおける前記複数の個別配管の配置順が、前記タンク列の前記所定方向の中央に対して対称である、
    洋上液化ガス貯蔵設備。     In the offshore liquefied gas storage facility according to claim 4, further:
    Featuring multiple individual pipes connected to different parts of each tank,
    The arrangement order of the plurality of individual pipes in each tank is symmetrical with respect to the center of the tank row in the predetermined direction;
    Offshore liquefied gas storage facility.
PCT/JP2022/017705 2022-04-13 2022-04-13 Offshore liquefied gas storage facility WO2023199430A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170010539A (en) * 2015-07-20 2017-02-01 대우조선해양 주식회사 Gas Venting System of Drillship and Drillship having The Same
JP2017043154A (en) * 2015-08-25 2017-03-02 三井造船株式会社 Floating structure with liquefied gas storage facility and design method therefor
JP2019034665A (en) * 2017-08-18 2019-03-07 株式会社 商船三井 Ship for energy transport
JP2021194986A (en) * 2020-06-12 2021-12-27 三井Ｅ＆Ｓ造船株式会社 Liquefied gas carrier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170010539A (en) * 2015-07-20 2017-02-01 대우조선해양 주식회사 Gas Venting System of Drillship and Drillship having The Same
JP2017043154A (en) * 2015-08-25 2017-03-02 三井造船株式会社 Floating structure with liquefied gas storage facility and design method therefor
JP2019034665A (en) * 2017-08-18 2019-03-07 株式会社 商船三井 Ship for energy transport
JP2021194986A (en) * 2020-06-12 2021-12-27 三井Ｅ＆Ｓ造船株式会社 Liquefied gas carrier

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