Ships

Abstract

To provide a vessel capable of effectively making use of space secured between a deck and a fuel adjustment chamber.SOLUTION: A vessel includes: an engine for propulsion with liquefied gas as fuel and two fuel tanks 2A, 2B arranged on a deck 12 for retaining the liquefied gas; and a fuel adjustment chamber 4 raised against the deck 12 to secure space between itself and the deck 12. The fuel adjustment chamber 4 stores equipment for adjusting temperature and pressure of the fuel on upstream side of the engine for propulsion. Fittings 10 are arranged in the space between the deck 12 and the fuel adjustment chamber 4.SELECTED DRAWING: Figure 2

Description

【Technical Field】 【0001】 The present disclosure relates to a ship including a propulsion engine using liquefied gas as fuel. 【Background Art】 【0002】 In recent years, for the purpose of reducing environmental impact, ships including propulsion engines using liquefied gases such as LNG (Liquefied Natural Gas) and LPG (Liquefied Petroleum Gas) as fuel have been actively developed. The liquefied gas may be supplied to the propulsion engine as a liquid, or may be made into a gas or a supercritical fluid and supplied to the propulsion engine. 【0003】 For example, Patent Document 1 discloses a ship in which two fuel tanks for storing liquefied gas, which is the fuel of the propulsion engine, are arranged on a deck constituting the upper surface of the hull. In this ship, an upper structure is provided at the stern portion on the deck, and fuel tanks are arranged on both sides of the upper structure in the ship width direction. 【0004】 Also, in the ship of Patent Document 1, a fuel conditioning room is arranged behind the upper structure and the fuel tank. Patent Document 1 describes that "related equipment for supplying liquefied gas fuel to the main propulsion engine and the power generation engine is installed" in the fuel conditioning room. Also, it can be seen from FIG. 1 of Patent Document 1 that the fuel conditioning room is raised with respect to the deck. 【Prior Art Documents】 【Patent Documents】 【0005】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2020-50135 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0006】 By the way, if the fuel adjustment room is raised relative to the deck, as in the ship described in Patent Document 1, it is desirable to make effective use of the space secured between the deck and the fuel adjustment room. 【0007】 Therefore, the purpose of this disclosure is to provide a vessel that can effectively utilize the space secured between the deck and the fuel adjustment room. [Means for solving the problem] 【0008】 This disclosure provides a ship comprising: a propulsion engine that uses liquefied gas as fuel; at least one fuel tank located on a deck forming the upper surface of the hull for storing the liquefied gas; and a fuel adjustment chamber that is raised relative to the deck so as to ensure space between the chamber and the deck, and which houses equipment for adjusting the temperature and pressure of the fuel upstream of the propulsion engine, wherein outfitting equipment is arranged in the space between the deck and the fuel adjustment chamber. [Effects of the Invention] 【0009】 According to this disclosure, a vessel is provided that can make effective use of the space secured between the deck and the fuel adjustment room. [Brief explanation of the drawing] 【0010】 [Figure 1] Figure 1A is a side view of the vessel according to the first embodiment, and Figure 1B is a top view of the same vessel. [Figure 2] This is a cross-sectional view along line II-II in Figure 1A. [Figure 3] This is a diagram of the piping system from the bunker station to the main engine (propulsion engine) and the power generation engine. [Figure 4] This figure shows a modified example of the first embodiment. [Figure 5] Figure 5A is a side view of the vessel according to the second embodiment, and Figure 5B is a top view of the same vessel. [Figure 6] This is a cross-sectional view along the line VI-VI in Figure 5B. [Figure 7]This figure shows a modified example of the second embodiment. [Modes for carrying out the invention] 【0011】 (First Embodiment) Figures 1A, 1B, and 2 show a vessel 1 according to the first embodiment. In this embodiment, vessel 1 is a liquid tanker that transports cargo that is a liquid, such as oil or liquefied gas. However, the use of vessel 1 is not limited to this and can be changed as appropriate. 【0012】 Specifically, the vessel 1 includes a hull 11 having a deck 12. The deck 12 constitutes the upper surface of the hull 11. In this embodiment, the deck 12 is flat along the entire length of the hull 11, but the deck 12 may be configured such that one or both of the bow and stern sections are higher or lower than the middle section. 【0013】 The hull 11 contains multiple cargo tanks 13 arranged in the longitudinal direction, and these cargo tanks 13 store the cargo, which is liquid. An engine room 14 is located at the stern (i.e., behind the cargo tanks 13) within the hull 11. Furthermore, a superstructure 15 is provided at the stern of the deck 12. The superstructure 15 includes the bridge and living quarters. 【0014】 The engine room 14 houses the propulsion engines that drive the propeller 16. In this embodiment, since the ship 1 is a mechanically propelled vessel, the propulsion engine is the main engine 51 (see Figure 3) that directly drives the propeller 16. In addition, as shown in Figure 3, the engine room 14 also houses multiple power generation engines 52 for generating onboard electricity and an auxiliary boiler 53 for processing surplus fuel. 【0015】 However, if the vessel 1 is an electric propulsion vessel, the main engine 51 is omitted and the power generation engine 52 drives the propeller 16 via a generator and motor, so the power generation engine 52 becomes the propulsion engine. 【0016】 The main engine 51 which is a propulsion engine and the power generation engine 52 use liquefied gas as fuel. On the deck 12, two fuel tanks 2A and 2B for storing the liquefied gas are arranged. The liquefied gas used as fuel is, for example, LNG, LPG, LH2, etc. When the cargo is liquefied gas, the fuel may be the same as the cargo or different. 【0017】 In the present embodiment, the main engine 51 and the power generation engine 52 are reciprocating engines of the Otto cycle with a fuel injection pressure of about 0.5 to 10 MPa. Also, in the present embodiment, as shown in FIG. 3, the vaporized gas obtained by forcibly vaporizing the liquefied gas and the BOG (Boil Off Gas) vaporized in the fuel tanks 2A and 2B are supplied as fuel to the main engine 51 and the power generation engine 52. However, when the liquefied gas is LPG, the LPG may be supplied as fuel to the main engine 51 in a liquid state. 【0018】 The main engine 51 may be a reciprocating engine of the diesel cycle with a fuel injection pressure of about 25 to 35 MPa. In this case, the supercritical fluid derived from the liquefied gas may be supplied as fuel to the main engine 51. Alternatively, the main engine 51 may be a gas turbine engine or a combination of a boiler and a steam turbine. 【0019】 The main engine 51 and the power generation engine 52 may be gas-only combustion engines that use only the vaporized gas and BOG, which are fuel gases, as fuel. Alternatively, the main engine 51 and the power generation engine 52 may be dual-fuel engines that can switch the fuel between one or both of the fuel gas and the fuel oil. 【0020】 In the present embodiment, the fuel tanks 2A and 2B are long cylindrical shapes in the ship length direction and are arranged substantially at the center of the hull 11 in the ship length direction. However, the shape and position of the fuel tanks 2A and 2B can be changed as appropriate. 【0021】 Fuel tanks 2A and 2B are spaced apart from each other in the width direction of the ship and are located on the port and starboard sides, respectively. A fuel adjustment room 4 is located between fuel tanks 2A and 2B. The fuel adjustment room 4 houses equipment for adjusting the temperature and pressure of the fuel upstream of the main engine 51 and the generator engine 52. 【0022】 As shown in Figure 2, the fuel adjustment chamber 4 is raised relative to the deck 12 so that space is secured between it and the deck 12. In other words, the fuel adjustment chamber 4 is supported by multiple support columns 42 rising from the deck 12. 【0023】 The space between the deck 12 and the fuel adjustment room 4 contains the outfitting equipment 10. In this embodiment, the outfitting equipment 10 consists of multiple pipes. These pipes will be described in detail later. 【0024】 Above fuel tanks 2A and 2B are tank connection chambers 3A and 3B, respectively. That is, tank connection chamber 3A corresponds to fuel tank 2A, and tank connection chamber 3B corresponds to fuel tank 2B. However, tank connection chambers 3A and 3B may also be located next to fuel tanks 2A and 2B (on the bow, stern, port, or starboard side). 【0025】 The fuel adjustment chamber 4 is equipped with a safety valve 41 that opens when the pressure inside the fuel adjustment chamber 4 exceeds a threshold. Similarly, each of the tank connection chambers 3A and 3B is equipped with a safety valve 31 that opens when the pressure inside the tank connection chamber (3A or 3B) exceeds a threshold. In addition, each of the fuel adjustment chamber 4 and the tank connection chambers 3A and 3B are equipped with a ventilation device. 【0026】 The fuel adjustment room 4 may be a single-story structure without an upper floor between the reference floor and the roof surface, or it may be a two-story structure with an upper floor between the reference floor and the roof surface. The deck 12 and the reference floor of the fuel adjustment room 4 are connected by a first passage 43, and the reference floor of the fuel adjustment room 4 and the floors of the tank connection rooms 3A and 3B are connected by two second passages 32, respectively. 【0027】 In this embodiment, as shown in Figure 1B, the second passage 32 is located on both sides of the fuel adjustment chamber 4 in the ship's width direction, and the first passage 43 connects the two second passages 32 by passing through the stern side of the fuel adjustment chamber 4. 【0028】 The fuel adjustment chamber 4 is provided with an entrance deck at the same height as the standard floor surface of the fuel adjustment chamber 4, near the entrance of the fuel adjustment chamber 4, and each of the tank connection chambers 3A and 3B is provided with an entrance deck at the same height as the floor surface of the tank connection chamber, near the entrance of the tank connection chamber (3A or 3B). 【0029】 The first passage 43 includes two staircases (omitted in Figure 1B) that reach the height from the deck 12 to the entrance deck of the fuel adjustment room 4, and each second passage 32 includes a staircase that reaches the height from the entrance deck of the fuel adjustment room 4 to the entrance deck of the corresponding tank connection room (3A or 3B). Note that the number of staircases in the first passage 43 may be one. 【0030】 Furthermore, a pair of bunker stations 2C and 2D for connecting to liquefied gas supply sources are located on the port and starboard sides of the deck 12. 【0031】 As shown in Figure 3, liquefied gas is supplied from bunker stations 2C and 2D to fuel tank 2A ​​via fuel receiving pipe 6A, and from bunker stations 2C and 2D to fuel tank 2B via fuel receiving pipe 6B. The upstream sections of fuel receiving pipe 6A and fuel receiving pipe 6B merge to form a common flow path. Shut-off valves 61 are provided in both fuel receiving pipes 6A and 6B near the fuel tank (2A or 2B). 【0032】 Liquefied gas is introduced from fuel tank 2A ​​to fuel adjustment chamber 4 via liquid pipe 7A, and from fuel tank 2B to fuel adjustment chamber 4 via liquid pipe 7B. The upstream end of liquid pipe 7A is connected to a pump 21 located in fuel tank 2A, and the upstream end of liquid pipe 7B is connected to a pump 21 located in fuel tank 2B. The downstream sections of liquid pipe 7A and liquid pipe 7B merge to form a common flow path. Shut-off valves 71 are provided in liquid pipes 7A and 7B, respectively, near the fuel tank (2A or 2B). 【0033】 From fuel tank 2A ​​to fuel adjustment chamber 4, vaporized BOG is guided through BOG piping 7C, and from fuel tank 2B to fuel adjustment chamber 4, vaporized BOG is guided through BOG piping 7D. The downstream sections of liquid piping 7A and liquid piping 7B merge to form a common flow path. Shut-off valves 72 are provided near the fuel tank (2A or 2B) in BOG pipings 7C and 7D, respectively. 【0034】 The tank connection chamber 3A partitions the area where the fuel receiving pipe 6A, liquid pipe 7A, and BOG pipe 7C are concentrated. The fuel tank 2A ​​is provided with a dome for consolidating the fuel receiving pipe 6A, liquid pipe 7A, and BOG pipe 7C, and the tank connection chamber 3A partitions the area adjacent to this dome. The tank connection chamber 3A also houses the shut-off valve 61 provided on the fuel receiving pipe 6A, the shut-off valve 71 provided on the liquid pipe 7A, and the shut-off valve 72 provided on the BOG pipe 7C. 【0035】 Furthermore, within the tank connection chamber 3A, a return pipe 6C branches off from the BOG pipe 7C downstream of the shut-off valve 72, and a shut-off valve 62 is installed in this return pipe 6C. The return pipe 6C branches off further and extends to bunker stations 2C and 2D. 【0036】 Similarly, the tank connection chamber 3B partitions the area where the fuel receiving pipe 6B, liquid pipe 7B, and BOG pipe 7D are concentrated. The fuel tank 2B is provided with a dome for consolidating the fuel receiving pipe 6B, liquid pipe 7B, and BOG pipe 7D, and the tank connection chamber 3B partitions the area adjacent to that dome. The tank connection chamber 3B also houses the shut-off valve 61 provided in the fuel receiving pipe 6B, the shut-off valve 71 provided in the liquid pipe 7B, and the shut-off valve 72 provided in the BOG pipe 7D. 【0037】 Furthermore, within the tank connection chamber 3B, a return pipe 6D branches off from the BOG pipe 7D downstream of the shut-off valve 72, and a shut-off valve 62 is installed on this return pipe 6D. The return pipe 6D branches off further and extends to bunker stations 2C and 2D. 【0038】 The downstream sections of return pipe 6C and return pipe 6D merge to form a common flow path. Return pipes 6C and 6D are used to return an amount of gas roughly equal to the amount supplied to the fuel tanks 2A and 2B back to the liquefied gas source. 【0039】 Within the fuel adjustment chamber 4, liquid pipes 7A and 7B are connected to the vaporizer 81. In the vaporizer 81, liquefied gas is vaporized to produce vaporized gas, which is then guided to the buffer container 83 through pipe 82. The vaporizer 81 plays a role in regulating the temperature and pressure of the vaporized gas. 【0040】 Furthermore, within the fuel adjustment chamber 4, BOG pipes 7C and 7D are connected to the heater 85. The BOG heated by the heater 85 is led to the buffer container 83 through pipe 86. A compressor 87 is provided in pipe 86. The heater 85 and compressor 87 play a role in regulating the temperature and pressure of the BOG. 【0041】 The buffer container 83 temporarily stores fuel, which is a mixture of vaporized gas and BOG. ​​The fuel, whose temperature and pressure have been adjusted in the fuel adjustment chamber 4, i.e., the fuel temporarily stored in the buffer container 83, is led from the fuel adjustment chamber 4 to the main engine 51 via the first fuel supply pipe 9A, from the fuel adjustment chamber 4 to the power generation engine 52 via the second fuel supply pipe 9B, and from the fuel adjustment chamber 4 to the auxiliary boiler 53 via the third fuel supply pipe 9C. The upstream sections of the first fuel supply pipe 9A, the second fuel supply pipe 9B, and the third fuel supply pipe 9C merge to form a common flow path. 【0042】 The first fuel supply pipe 9A is provided with a valve unit 91 containing multiple valves. Similarly, the second fuel supply pipe 9B and the third fuel supply pipe 9C are each provided with a valve unit 91. In this embodiment, the valve unit 91 is located in the engine room 14, but the valve unit 91 may also be located in the fuel adjustment chamber 4. Alternatively, if there is a room dedicated to the valve unit 91, the valve unit 94 may be located there. 【0043】 The outfitting equipment 10 located in the space between the deck 12 and the fuel adjustment room 4 may include at least one of the fuel receiving pipes 6A, 6B, liquid pipes 7A, 7B, BOG pipes 7C, 7D, and the first fuel supply pipe 9A. The outfitting equipment 10 located in the space between the deck 12 and the fuel adjustment room 4 may also include at least one of the return pipes 6C, 6D, the second fuel supply pipe 9B, and the third fuel supply pipe 9C. Furthermore, the outfitting equipment 10 located in the space between the deck 12 and the fuel adjustment room 4 may include cargo pipes through which the liquid cargo flows during loading or unloading. 【0044】 As described above, in the ship 1 of this embodiment, the outfitting equipment 10 is arranged in the space between the deck 12 and the fuel adjustment room 4, so that space can be used effectively. Moreover, because the fuel adjustment room 4 is raised above the deck 12, even if there is a hazardous area below the fuel adjustment room 4, it can be physically isolated. 【0045】 Furthermore, in this embodiment, since the fuel adjustment chamber 4 is located between the two fuel tanks 2A and 2B on the port and starboard sides, it is possible to make the layout of the two fuel tanks 2A and 2B and the fuel adjustment chamber 4 symmetrical with respect to the ship's centerline extending in the longitudinal direction. 【0046】 Furthermore, in this embodiment, the first passage 43 connects the deck 12 to the reference floor surface of the fuel adjustment room 4, and the second passage 32 connects the reference floor surface of the fuel adjustment room 4 to the floor surfaces of the tank connection rooms 3A and 3B. Therefore, the first passage 43 can be used not only as a conductor from the deck 12 to the fuel adjustment room 4, but also as a conductor from the deck 12 to the tank connection rooms 3A and 3B. 【0047】 Furthermore, since the first passage 43 connects the two second passages 32, it is possible to access either of the two second passages 32 through the first passage 43. 【0048】 Furthermore, in this embodiment, a safety valve 41 is provided in the fuel adjustment chamber 4, and safety valves 31 are provided in the tank connection chambers 3A and 3B. Therefore, even if fuel leaks from the equipment and piping in the fuel adjustment chamber 4 or the equipment and piping in the tank connection chambers 3A and 3B, the appropriate pressure can be maintained inside the fuel adjustment chamber 4 or the tank connection chambers 3A and 3B. 【0049】 <Variation> As shown in Figure 4, in addition to the second passage 32 connecting the reference floor surface of the fuel adjustment chamber 4 and the floor surface of the tank connection chamber 3B, a second passage 33 connecting the roof surface of the fuel adjustment chamber 4 and the floor surface of the tank connection chamber 3B may also be adopted. If the second passage 33 is adopted, the second passage 32 may be omitted. In Figure 4, a third passage 44 connecting the reference floor surface of the fuel adjustment chamber 4 and the upper floor surface of the fuel adjustment chamber 4, and a fourth passage 45 connecting the upper floor surface of the fuel adjustment chamber 4 and the roof surface of the fuel adjustment chamber 4 are also adopted. 【0050】 Alternatively, if a third passage 44 is used to connect the reference floor surface of the fuel adjustment chamber 4 with the upper floor surface of the fuel adjustment chamber 4, a second passage connecting the upper floor surface of the fuel adjustment chamber 4 with the floor surface of the tank connection chamber 3B may be used instead of the second passages 32 and 33. 【0051】 Figure 4 shows a modified example on the starboard side, but the above-described modification can also be applied to the port side. 【0052】 (Second Embodiment) Figures 5A, 5B, and 6 show the vessel 1A according to the second embodiment. In this embodiment, the same reference numerals are used for components identical to those in the first embodiment, and redundant explanations are omitted. 【0053】 In this embodiment, a fuel tank 2E for storing liquefied gas, which is the fuel, is located at the stern, and a fuel adjustment chamber 4 is located in front of this fuel tank 2E. The fuel tank 2E is cylindrical and long in the width direction of the ship, and is positioned on the deck 12 so as to be approximately in the center of the hull 11 in the width direction of the ship. However, the shape and position of the fuel tank 2E can be changed as appropriate. 【0054】 A tank connection chamber 3C is located above the fuel tank 2E. The tank connection chamber 3C has the same configuration as the tank connection chambers 3A and 3B of the first embodiment. 【0055】 In other words, the tank connection chamber 3C partitions the area where the fuel receiving pipe 6E, liquid pipe, and BOG pipe are concentrated, and also houses the shut-off valves provided in the fuel receiving pipe 6E, the liquid pipe, the BOG pipe, and the return pipe 6F. A safety valve 31 is also provided in the tank connection chamber 3C. 【0056】 In this embodiment, as in the first embodiment, the fuel adjustment chamber 4 is raised relative to the deck 12 so that space is secured between it and the deck 12. In other words, the fuel adjustment chamber 4 is supported by a plurality of support columns 42 rising from the deck 12. 【0057】 The deck 12 and the reference floor surface of the fuel adjustment room 4 are connected by a first passage 46, and the roof surface of the fuel adjustment room 4 and the floor surface of the tank connection room 3C are connected by a second passage 34. Furthermore, the reference floor surface of the fuel adjustment room 4 and the upper floor surface of the fuel adjustment room 4 are connected by a third passage 47, and the upper floor surface of the fuel adjustment room 4 and the roof surface of the fuel adjustment room 4 are connected by a fourth passage 48. In this embodiment, the first passage 46, the third passage 47, and the fourth passage 48 are located behind the fuel adjustment room 4. 【0058】 The fuel adjustment room 4 is provided with a first-floor entrance deck at the same height as the standard floor level of the fuel adjustment room 4, near the first-floor entrance of the fuel adjustment room 4, and the first passageway 46 includes a staircase that is the same height as the first-floor entrance deck from the deck 12. 【0059】 Similarly, the fuel adjustment room 4 is provided with a second-floor entrance deck near the second-floor entrance of the fuel adjustment room 4, at the same height as the upper floor of the fuel adjustment room 4, and the third passageway 47 includes a staircase that extends from the first-floor entrance deck to the second-floor entrance deck. 【0060】 The fourth passageway 48 includes a staircase that extends from the second-floor entrance deck to the rooftop. Meanwhile, the second passageway 34 includes a staircase that extends from the rooftop of the fuel adjustment room 4 to the entrance deck of the tank connection room 3C. 【0061】 In this embodiment, as in the first embodiment, the outfitting components 10 located in the space between the deck 12 and the fuel adjustment chamber 4 consist of multiple pipes. The outfitting components 10 may include at least one of the following: a fuel receiving pipe 6E, a liquid pipe, a BOG pipe, and a first fuel supply pipe 9A. The outfitting components 10 located in the space between the deck 12 and the fuel adjustment chamber 4 may also include at least one of the following: a return pipe 6F, a second fuel supply pipe 9B, and a third fuel supply pipe 9C. Furthermore, the outfitting components 10 located in the space between the deck 12 and the fuel adjustment chamber 4 may include cargo pipes through which the liquid cargo flows during loading or unloading. 【0062】 In this embodiment, as in the first embodiment, the outfitting equipment 10 is arranged in the space between the deck 12 and the fuel adjustment room 4, so that space can be used effectively. Moreover, because the fuel adjustment room 4 is raised relative to the deck 12, even if there is a hazardous area below the fuel adjustment room 4, it can be physically isolated. 【0063】 Furthermore, in this embodiment, the fuel tank 2E is located at the stern, and the fuel adjustment chamber 4 is located in front of the fuel tank 2E. This makes it possible to arrange the fuel tank 2E and the fuel adjustment chamber 4 symmetrically with respect to the ship's centerline extending in the longitudinal direction. 【0064】 Furthermore, in this embodiment, the first passage 46 connects the deck 12 to the reference floor surface of the fuel adjustment room 4, the third passage 47 connects the reference floor surface of the fuel adjustment room 4 to the upper floor surface, the fourth passage 48 connects the upper floor surface of the fuel adjustment room 4 to the roof surface, and the second passage 32 connects the roof surface of the fuel adjustment room 4 to the floor surface of the tank connection room 3C. Therefore, the first passage 46 can be used not only as a passage from the deck 12 to the fuel adjustment room 4, but also as a passage from the deck 12 to the tank connection room 3C. 【0065】 <Variation> The outfitting equipment 10 located in the space between the deck 12 and the fuel adjustment room 4 may include at least one of a mooring winch and a mooring rope. In this case, the outfitting equipment 10 located in the space between the deck 12 and the fuel adjustment room 4 may or may not include piping. 【0066】 Furthermore, as shown in Figure 7, the third passage 47 and the fourth passage 48 may be omitted, and a second passage 35 connecting the reference floor surface of the fuel adjustment chamber 4 and the floor surface of the tank connection chamber 3C may be adopted. 【0067】 (Other embodiments) This disclosure is not limited to the embodiments described above, and various modifications are possible without departing from the gist of this disclosure. 【0068】 For example, if the outfitting 10 located in the space between the deck 12 and the fuel adjustment room 4 includes piping, the outfitting 10 may also include traffic devices such as an overbridge for crew members to pass over the piping. Alternatively, if the outfitting 10 located in the space between the deck 12 and the fuel adjustment room 4 includes mooring ropes, the outfitting 10 may also include mooring hardware such as stand rollers, fairleads, and chocks. 【0069】 (summary) In a first aspect, the present disclosure provides a vessel comprising: a propulsion engine that uses liquefied gas as fuel; at least one fuel tank located on a deck forming the upper surface of the hull for storing the liquefied gas; and a fuel adjustment chamber, which is raised relative to the deck so as to ensure a space between the chamber and the deck, and which houses equipment for adjusting the temperature and pressure of the fuel upstream of the propulsion engine, wherein outfitting equipment is arranged in the space between the deck and the fuel adjustment chamber. 【0070】 With the above configuration, the outfitting equipment is placed in the space between the deck and the fuel adjustment room, allowing for effective use of that space. Moreover, because the fuel adjustment room is elevated relative to the deck, any hazardous areas located below the fuel adjustment room can be physically isolated. 【0071】 In a second embodiment, in the first embodiment, for example, the outfitting may include at least one of a mooring winch, a mooring rope, and piping. 【0072】 In a third embodiment, in the second embodiment, for example, the vessel further comprises a pair of bunker stations for connecting to a source of liquefied gas, arranged on the deck so as to be located on the port and starboard sides; fuel receiving piping for leading the liquefied gas from the pair of bunker stations to the at least one fuel tank; liquid piping for leading the liquefied gas from the at least one fuel tank to the fuel adjustment chamber; BOG piping for leading BOG vaporized in the at least one fuel tank from the at least one fuel tank to the fuel adjustment chamber; and fuel supply piping for leading fuel whose temperature and pressure have been adjusted in the fuel adjustment chamber from the fuel adjustment chamber to the propulsion engine, wherein the outfitting may include at least one of the fuel receiving piping, the liquid piping, the BOG piping, and the fuel supply piping. 【0073】 In a fourth embodiment, in the third embodiment, for example, the vessel may further include at least one tank connection chamber that demarcates an area where the fuel receiving piping, the liquid piping and the BOG piping corresponding to the at least one fuel tank are concentrated. 【0074】 In a fifth embodiment, in the fourth embodiment, the at least one fuel tank may include two fuel tanks spaced apart from each other in the width direction of the vessel, the fuel adjustment chamber may be located between the two fuel tanks, and the at least one tank connection chamber may include two tank connection chambers located above the two fuel tanks, respectively. This configuration makes it possible to arrange the two fuel tanks and the fuel adjustment chamber symmetrically with respect to the centerline of the hull extending in the longitudinal direction. 【0075】 In a sixth embodiment, in the fifth embodiment, the vessel may further include a first passage connecting the deck and the reference floor surface of the fuel adjustment room, and two second passages connecting the reference floor surface, upper deck floor surface, or rooftop surface of the fuel adjustment room to the floor surfaces of the two tank connection rooms, respectively. With this configuration, the first passage can be used not only as a route from the deck to the fuel adjustment room, but also as a route from the deck to the tank connection rooms. 【0076】 In a seventh embodiment, as in the sixth embodiment, the two second passages may be located on either side of the fuel adjustment chamber in the width direction of the ship, and the first passage may connect the two second passages by passing through the stern side of the fuel adjustment chamber. With this configuration, either of the two second passages can be accessed through the first passage. 【0077】 In an eighth aspect, in the fourth aspect, the at least one fuel tank may be located at the stern, and the fuel adjustment chamber may be located in front of the at least one fuel tank. This configuration makes it possible to arrange the fuel tanks and the fuel adjustment chamber symmetrically with respect to the hull centerline extending in the longitudinal direction. 【0078】 In a ninth aspect, in the eighth aspect, the vessel may further include a first passage connecting the deck and the reference floor surface of the fuel adjustment room, and a second passage connecting the reference floor surface, upper deck floor surface, or roof surface of the fuel adjustment room to the floor surface of the at least one tank connection room. With this configuration, the first passage can be used not only as a passage from the deck to the fuel adjustment room, but also as a passage from the deck to the tank connection room. 【0079】 In a tenth embodiment, in the fourth to ninth embodiments, each of the fuel adjustment chamber and the at least one tank connection chamber may be provided with a safety valve that opens when the pressure in the fuel adjustment chamber or the tank connection chamber exceeds a threshold. With this configuration, even if fuel leaks from the equipment and piping in the fuel adjustment chamber or the equipment and piping in the tank connection chamber, the pressure in the fuel adjustment chamber or the tank connection chamber can be maintained at an appropriate level. [Explanation of symbols] 【0080】 1,1A ship 10 Equipment 11 Hull 12 Deck 2A, 2B, 2E Fuel Tanks 2C, 2D Bunker Station 3A~3C Tank connection room 31 Safety valve 32~34 2nd aisle 4 Fuel adjustment room 41 Safety valve 43,46 1st aisle 51 Main engine (propulsion engine) 6A, 6B, 6E Fuel receiving piping 61 Shut-off valve 7A,7B Liquid piping 7C,7D BOG piping 71,72 Shut-off valve 9A~9C Fuel supply piping

Claims

[Claim 1] A propulsion engine that uses liquefied gas as fuel, At least one fuel tank located on the deck that constitutes the upper surface of the hull, for storing the liquefied gas, It comprises a fuel adjustment chamber, which is raised relative to the deck so as to ensure space between it and the deck, and which houses equipment for adjusting the temperature and pressure of the fuel upstream of the propulsion engine, The fittings are arranged in the space between the deck and the fuel adjustment room. A first passage connecting the deck and the reference floor surface of the fuel adjustment room, A vessel further comprising at least one second passage connecting the reference floor surface, upper floor surface, or roof surface of the fuel adjustment chamber to the floor surface of at least one tank connection chamber located above the at least one fuel tank. [Claim 2] The ship according to claim 1, wherein the outfitting includes at least one of a mooring winch, a mooring rope, and piping. [Claim 3] A pair of bunker stations for connecting to the liquefied gas supply source, positioned on the port and starboard sides of the deck, A fuel receiving pipe that guides the liquefied gas from the pair of bunker stations to the at least one fuel tank, A liquid pipe for guiding the liquefied gas from at least one fuel tank to the fuel adjustment chamber, A BOG piping system that guides the BOG vaporized in the at least one fuel tank from the at least one fuel tank to the fuel adjustment chamber, The system further comprises a fuel supply pipe that guides fuel, whose temperature and pressure have been adjusted in the fuel adjustment chamber, from the fuel adjustment chamber to the propulsion engine, The ship according to claim 2, wherein the outfitting includes at least one of the fuel receiving pipe, the liquid pipe, the BOG pipe, and the fuel supply pipe. [Claim 4] The vessel according to claim 3, further comprising at least one tank connection chamber that demarcates an area where the fuel receiving piping, the liquid piping, and the BOG piping corresponding to the at least one fuel tank are concentrated. [Claim 5] The aforementioned at least one fuel tank includes two fuel tanks spaced apart from each other in the width direction of the ship, The fuel adjustment chamber is located between the two fuel tanks. The vessel according to claim 4, wherein the at least one tank connection chamber includes two tank connection chambers, each located above the two fuel tanks. [Claim 6] The vessel according to claim 5, wherein the at least one second passage includes two second passages connecting the reference floor surface, upper floor surface or roof surface of the fuel adjustment room to the floor surfaces of the two tank connection rooms, respectively. [Claim 7] The two second passages are located on either side of the fuel adjustment chamber in the ship's width direction. The vessel according to claim 6, wherein the first passage connects the two second passages by passing through the stern side of the fuel adjustment chamber. [Claim 8] The vessel according to claim 4, wherein the at least one fuel tank is located at the stern, and the fuel adjustment chamber is located forward of the at least one fuel tank. [Claim 9] A first passage connecting the deck and the reference floor surface of the fuel adjustment room, The connection between the reference floor surface, upper floor surface, or roof surface of the fuel adjustment chamber and the at least one tank. A second passageway connecting to the floor of the room, The ship according to claim 8, further comprising: [Claim 10] The vessel according to any one of claims 4 to 9, wherein each of the fuel adjustment chamber and the at least one tank connection chamber is provided with a safety valve that opens when the pressure in the fuel adjustment chamber or the tank connection chamber exceeds a threshold.

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