Bulk cargo ship with embedded fuel tank

Abstract

The invention belongs to the technical field of ship construction, and relates to a bulk cargo ship with an embedded fuel tank. A first transverse bulkhead is arranged in any original cargo hold of the bulk cargo ship with the embedded fuel tank so as to divide the original cargo hold into a new cargo hold and a fuel hold, and the first transverse bulkhead can be adjusted in the length direction of the bulk cargo ship so as to adjust the relative space size of the new cargo hold and the fuel hold. According to the bulk cargo ship with the embedded fuel tank, any original cargo hold is divided into the new cargo hold and the fuel hold, that is, only part of space of one original cargo hold of the bulk cargo ship is occupied to serve as the fuel hold, and it is guaranteed that the capacity of the whole cargo hold is not changed greatly. Moreover, the first transverse bulkhead can be adjusted in the length direction of the bulk cargo ship so as to flexibly adjust the relative space size of the new cargo cabin and the fuel cabin according to the actual operation route of the bulk cargo ship, so that the space of the fuel cabin can be matched with the required fuel capacity, namely, the storage capacity of the fuel and the cabin capacity of the cargo cabin are considered at the same time; and the freight economy of the bulk cargo ship is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shipbuilding, and particularly relates to a bulk carrier with embedded fuel tank. BACKGROUND

[0002] With the acceleration of low-carbon transformation of the shipping industry, ammonia fuel has become an important direction for power transformation of bulk carriers due to its zero-carbon emission characteristics. However, the existing ammonia fuel modification technology faces many challenges in the application of large bulk carriers: the traditional scheme usually arranges the fuel tank in the stern or the cargo hold area, but the stern space is limited, and it is difficult to meet the large-capacity storage requirements of ammonia fuel; and directly occupying the cargo hold significantly reduces the carrying capacity of the ship, and only the goods can be stacked on the deck, affecting the economy.

[0003] Therefore, there is an urgent need for a bulk carrier that can solve the above problems. SUMMARY

[0004] The present application aims to solve the technical problem that the existing bulk carrier cannot simultaneously consider the storage capacity of ammonia fuel and the cargo capacity of the cargo hold.

[0005] In order to solve the above technical problems, the present application provides a bulk carrier with an embedded fuel tank, which adopts the following technical solutions:

[0006] Any original cargo hold of the bulk carrier with an embedded fuel tank is provided with a first transverse bulkhead to separate the original cargo hold into a new cargo hold and a fuel tank, and the first transverse bulkhead can be adjusted along the length direction of the bulk carrier to adjust the relative space size of the new cargo hold and the fuel tank.

[0007] Optionally, the fuel tank is arranged in the fuel tank, and the space size of the fuel tank can be adjusted according to the capacity of the ammonia fuel tank.

[0008] Optionally, a plurality of original cargo holds are distributed along the length direction of the bulk carrier, and the first transverse bulkhead is arranged in the original cargo hold close to the stern of the bulk carrier.

[0009] Optionally, a second transverse bulkhead is arranged between adjacent original cargo holds, and the second transverse bulkhead can be adjusted along the length direction of the bulk carrier to adjust the relative space size between adjacent original cargo holds.

[0010] Optionally, a filling station, a fuel pipe room, an auxiliary equipment room and a fuel preparation room are arranged on the deck of the bulk carrier and along the width direction of the bulk carrier, and a main engine is arranged at the stern of the bulk carrier.

[0011] The filling station, the fuel pipe room, the fuel preparation room, the auxiliary equipment room and the main engine are functionally connected to each other through pipelines.

[0012] Optionally, the filling station is connected with the ammonia fuel tank through the pipeline, so that external ammonia fuel can be filled into the ammonia fuel tank through the filling station.

[0013] Optionally, the fuel connection room is connected with the ammonia fuel tank through the pipeline, and a valve for controlling all the pipelines is arranged in the fuel connection room.

[0014] Optionally, the auxiliary equipment room is provided with a nitrogen generating device and an ammonia leakage detection system.

[0015] The nitrogen generating device supplies nitrogen to the fuel cabin, the main engine and the filling station through the pipeline, so that the ammonia leakage detection system can trigger an on-site sound and light alarm and a remote sound and light alarm when the ammonia concentration reaches a preset threshold.

[0016] Optionally, the fuel preparation room comprises a fuel supply unit, a fuel valve group and a reliquefaction unit.

[0017] The reliquefaction unit can cool and liquefy gaseous ammonia fuel in the fuel tank, the fuel tank supplies ammonia fuel to the fuel supply unit, the fuel supply unit pressurizes and adjusts the temperature of the ammonia fuel, the adjusting fuel valve group adjusts the flow of the ammonia fuel and then supplies the ammonia fuel to the main engine.

[0018] Optionally, the deck is provided with a gas mast, and at least one of the filling station, the fuel connection room, the fuel preparation room and the auxiliary equipment room is in communication with the gas mast, so that ammonia exhaust gas can be discharged from the bulk carrier through the gas mast.

[0019] Compared with the prior art, the bulk carrier with the embedded fuel tank has the following beneficial effects:

[0020] Any original cargo cabin of the bulk carrier is provided with a first transverse bulkhead, which divides the original cargo cabin into a new cargo cabin and a fuel cabin, that is, only part of the space of one original cargo cabin of the bulk carrier is occupied as the fuel cabin, so as to ensure that the capacity of the whole cargo cabin changes little. Moreover, the first transverse bulkhead can be adjusted along the length direction of the bulk carrier, so as to flexibly adjust the relative space size of the new cargo cabin and the fuel cabin according to the actual operation route of the bulk carrier, so that the space of the fuel cabin can be adapted to the required fuel capacity, that is, the storage capacity of the fuel and the capacity of the cargo cabin are considered at the same time, and the economy of the bulk carrier for cargo transportation is effectively provided. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the schemes in the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0022] Figure 1 is a side view of a bulk carrier with embedded fuel tanks in one embodiment of the present application;

[0023] Figure 2 is Figure 1 a top view of a bulk carrier with embedded fuel tanks in one embodiment of the present application.

[0024] Reference signs in the drawings are as follows:

[0025] 100, a bulk carrier with embedded fuel tanks; 101, a deck; 102, a stern;

[0026] 10, an original cargo hold; 11, a first transverse bulkhead; 12, a new cargo hold; 13, a fuel hold; 131, an ammonia fuel tank; 14, a second transverse bulkhead;

[0027] 20, a filling station; 30, a fuel connection room; 40, an auxiliary equipment room; 41, a nitrogen generation device; 42, an ammonia leakage detection system; 50, a fuel preparation room; 51, a fuel supply unit; 52, a fuel valve group; 53, a reliquefaction unit; 60, a main engine; 70, a pipe trunk; 71, a pipeline; 80, a gas mast. DETAILED DESCRIPTION

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application, for example, the terms "length", "width", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, refer to the orientation or position shown in the drawings and are used for convenience in describing the present application and are not intended to be limiting. The terms "comprise", "have" and any variations thereof are used in this specification and claims to indicate that the object or objects of the contact comprise the stated feature or features but do not exclude the presence of other feature or features. The terms "first", "second", and the like, used in the description and in the claims, do not necessarily denote any ordinal, but are used to distinguish different objects. The term "a plurality" means two or more, unless otherwise specified.

[0029] In this specification and in the claims, the term "include" and "have" and any variations thereof are used inclusively and not exclusivity; the terms "first", "second", and the like, used in the description and in the claims, do not necessarily denote any ordinal, but are used to distinguish different objects. The term "a plurality" means two or more, unless otherwise specified.

[0030] In this specification and in the claims, the term "include" and "have" and any variations thereof are used inclusively and not exclusivity; the terms "first", "second", and the like, used in the description and in the claims, do not necessarily denote any ordinal, but are used to distinguish different objects. The term "a plurality" means two or more, unless otherwise specified.

[0031] Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be combined with any of the other embodiments unless specifically noted otherwise.

[0032] Figure 2 is a top view of a bulk carrier 100 with an embedded fuel tank in one embodiment of the application. On this basis, in order to facilitate the description of the corresponding embodiments below, an XY coordinate system is established, in the aforementioned plane, the width direction of the bulk carrier 100 is the X-axis direction, and the length direction of the bulk carrier 100 is the Y-axis direction. The aforementioned coordinate system setting can be flexibly set according to actual needs, which is not specifically limited here.

[0033] The embodiment of the application provides a bulk carrier 100 with an embedded fuel tank, as shown in Figure 1 and Figure 2 The bulk carrier 100 can be provided with at least one original cargo hold 10 to load cargo, and corresponding cargo can be classified into the corresponding original cargo hold 10 according to different classifications for easy counting. On this basis, any original cargo hold 10 can be provided with a first transverse bulkhead 11 to separate the original cargo hold 10 to form a new cargo hold 12 and a fuel hold 13. The new cargo hold 12 has the same function as the original cargo hold 10 and is used to load cargo. The fuel hold 13 is used to place fuel to provide power for the navigation of the bulk carrier 100. That is, only part of the space of one original cargo hold 10 of the bulk carrier 100 is used to device fuel, and the remaining space (i.e., the new cargo hold 12) of the original cargo hold 10 and other original cargo holds 10 are still used to load cargo, ensuring that the overall cargo hold capacity does not change much.

[0034] Moreover, the first transverse bulkhead 11 can be adjusted along the length direction (Y-axis direction) of the bulk carrier 100 to adjust the relative space size of the new cargo hold 12 and the fuel hold 13. Specifically, according to the actual operation route distance of the bulk carrier 100, the first transverse bulkhead 11 is adjusted along the length direction (Y-axis direction) of the bulk carrier 100 to adapt the space of the fuel hold 13 to the required fuel capacity and ensure that the capacity of the new cargo hold 12 is not greatly reduced.

[0035] In summary, compared with the prior art, the bulk carrier 100 with an embedded fuel tank has at least the following beneficial effects:

[0036] The bulk cargo ship 100 is divided into a new cargo hold 12 and a fuel hold 13 by any one of the original cargo holds 10, i.e., only part of the space of any one of the original cargo holds 10 of the bulk cargo ship 100 is occupied as the fuel hold 13, to ensure that the capacity of the bulk cargo hold changes little. Moreover, the first transverse bulkhead 11 can be adjusted along the length direction (Y-axis direction) of the bulk cargo ship 100, to flexibly adjust the relative space sizes of the new cargo hold 12 and the fuel hold 13 according to the actual operating route distance of the bulk cargo ship 100, so that the space of the fuel hold 13 can be adapted to the required fuel capacity, i.e., both the storage capacity of the fuel and the capacity of the bulk cargo hold are taken into account, effectively providing the economy of the bulk cargo ship 100.

[0037] In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings. Figure 1 and Figure 2 The technical solutions in the embodiments of the present application are described clearly and completely.

[0038] In some embodiments, as shown in Figure 1 and Figure 2 The fuel hold 13 can be provided with an ammonia fuel tank 131, and the ammonia fuel tank 131 can be filled with ammonia fuel that can provide the bulk cargo ship 100 with sailing power. Using ammonia fuel as a power source has environmental advantages: ammonia fuel contains no carbon element, and only produces water and nitrogen gas after combustion, with a theoretical emission reduction rate of over 90%; and also has storage and transportation advantages: ammonia can be liquefied by pressurization at room temperature (-33℃ or 10 atm), with a storage and transportation cost of only one-fifth of that of liquid hydrogen, and without the need for special low-temperature equipment, and can be directly filled at existing LNG terminals.

[0039] Based on this, the space size of the fuel hold 13 can be adjusted according to the capacity of the ammonia fuel tank 131. Understandably, according to the actual operating route distance of the bulk cargo ship 100, if the route distance is long, the first transverse bulkhead 11 can be moved along the length direction (Y-axis direction) of the bulk cargo ship 100 to the direction close to the new cargo hold 12, so that the space of the fuel hold 13 becomes larger, at this time, the ammonia fuel tank 131 with a larger capacity can be placed in the fuel hold 13, to ensure that there is enough ammonia fuel for the bulk cargo ship 100 to travel the route distance. Conversely, if the route distance is short, the first transverse bulkhead 11 can be moved along the length direction (Y-axis direction) of the bulk cargo ship 100 to the direction close to the fuel hold 13, so that the space of the fuel hold 13 becomes smaller, at this time, the ammonia fuel tank 131 with a smaller capacity can be just placed in the fuel hold 13; relatively, the new cargo hold 12 can be ensured to have a larger space for accommodating cargo.

[0040] In some embodiments, as shown in Figure 1 and Figure 2As shown, second transverse bulkheads 14 can be arranged between adjacent original cargo holds 10, and the second transverse bulkheads 14 can have the same structure as the first transverse bulkheads 11. The second transverse bulkheads 14 can be adjusted along the length direction (Y-axis direction) of the bulk carrier 100 to adjust the relative space size between adjacent original cargo holds 10.

[0041] It can be understood that different categories of cargos can be stored in corresponding original cargo holds 10 according to the categories of the cargos, and the cargo quantities of different categories of cargos can be different. Therefore, the space size of the corresponding original cargo holds 10 can be adjusted according to the cargo quantities of different categories of cargos, so that the corresponding categories of cargos can be just accommodated. That is, the second transverse bulkheads 14 enable the bulk carrier 100 to flexibly divide and arrange the cargo carrying area space according to different categories of cargos, so that the overall cargo hold space layout is compact, the cargos are convenient to count, and the overall cargo transportation efficiency is improved.

[0042] In some embodiments, as shown, Figure 2 As shown, the deck 101 of the bulk carrier 100 can be provided with a refueling station 20, a fuel pipe room 30, an auxiliary equipment room 40, and a fuel preparation room 50 along the width direction (X-axis direction) of the bulk carrier 100, and specifically above the fuel tank 13, so that the ammonia fuel system composed of the above-mentioned equipment rooms and the fuel tank 13 is concentrated at one place of the bulk carrier 100, effectively reducing the total length of the used pipelines 71 and the complexity of pipeline 71 laying, facilitating operation, management and maintenance, and improving the rationality of the deck 101 layout of the bulk carrier 100.

[0043] The stern 102 of the bulk carrier 100 can be provided with a main engine 60, which uses ammonia fuel as the main power source to drive the bulk carrier 100 to move. The refueling station 20, the fuel pipe room 30, the fuel preparation room 50, the auxiliary equipment room 40, and the main engine 60 can be functionally connected to each other through the pipelines 71.

[0044] In some embodiments, as shown, Figure 2 As shown, a pipe tunnel 70 can be arranged on one side of the refueling station 20, the fuel pipe room 30, the auxiliary equipment room 40, and the fuel preparation room 50 along the width direction (X-axis direction) of the bulk carrier 100, and all the pipelines 71 are concentrated and arranged in the pipe tunnel 70. The pipe tunnel 70 can have a ventilation structure to discharge ammonia gas to the atmosphere through the ventilation structure of the pipe tunnel 70 when the pipelines 71 leak ammonia gas. The pipe tunnel 70 can be provided with a leakage detection device to monitor whether ammonia gas leaks from the pipelines 71 in real time, so that appropriate measures can be taken in time to improve the safety performance of the bulk carrier 100.

[0045] In some embodiments, the ammonia fuel tank 131 can be a C-type ammonia storage tank, which has a large capacity and can meet the long-distance navigation of the actual operation route of the bulk carrier 100. Based on this, the pipelines 71 connected between the C-type ammonia storage tank and other equipment rooms can be double-wall pipes.

[0046] The advantages of the C-type ammonia storage tank mainly lie in structural strength, storage safety and application flexibility: high structural strength, the C-type tank adopts an independent cylindrical tank body structure made of high-strength alloy steel, which can withstand an internal pressure of 0.4-0.6 MPa, and has high stability and can adapt to vibration and inclination during navigation of the bulk carrier. Storage safety, additional insulation materials can be installed on the outside of the tank body to control the daily evaporation rate to about 0.2%, and multiple layers of polyurethane foam and other insulation layers are used to reduce heat transfer and maintain the low temperature of liquid ammonia. Application flexibility, the C-type tank can reserve interfaces to adapt to different fuels (such as ammonia / methanol), support the expansion of dual-fuel systems, and the tank body structure is independent, which is convenient for adjusting the space layout of the bulk carrier according to needs.

[0047] In some embodiments, as shown in Figure 1 , based on that the main engine 60 is arranged at the stern 102 of the bulk carrier 100, the first transverse bulkhead 11 can be arranged close to the original cargo hold 10 of the stern 102 of the bulk carrier 100, so that the fuel tank 13 and the ammonia fuel tank 131 inside it are close to the main engine 60, so as to shorten the pipeline 71 connected between the ammonia fuel tank 131 and the main engine 60 as much as possible. Understandably, the shorter the pipeline 71 connected between the ammonia fuel tank 131 and the main engine 60, the lower the cost of the bulk carrier 100, the less likely the ammonia gas leaks from the pipeline 71, and the higher the safety.

[0048] In some embodiments, as shown in Figure 1 and Figure 2 , based on that the first transverse bulkhead 11 is arranged close to the original cargo hold 10 of the bulk carrier 100, the fuel tank 13 can be located between the new cargo hold 12 and another original cargo hold 10.

[0049] Understandably, one side of the first transverse bulkhead 11 towards the stern 102 is the new cargo hold 12, and the other side between the fuel tank 13 and the adjacent second transverse bulkhead 14. Based on this, if the actual operating route of the bulk carrier 100 is relatively far, a larger fuel tank 13 space is needed, so the new cargo hold 12 space may be excessively compressed, resulting in difficulty in placing goods in the new cargo hold 12. At this time, the first transverse bulkhead 11 and the second transverse bulkhead 14 can be adjusted in cooperation, and the second transverse bulkhead 14 moves away from the side of the stern 102 in the length direction (Y-axis direction) of the bulk carrier 100, to ensure that the fuel tank 13 space is sufficient while the new cargo hold 12 space can also place goods.

[0050] In some embodiments, as shown in Figure 2As shown, the filling station 20 can be connected with the ammonia fuel tank 131 through the pipeline 71, so that the external ammonia fuel can be filled into the ammonia fuel tank 131 through the filling station 20. Specifically, the filling station 20 can be arranged at the outermost side along the width direction (X-axis direction) of the bulk carrier 100, so as to facilitate the connection of the filling station 20 with the wharf or other ships, and the filling or unloading of the ammonia fuel. Preferably, two filling stations 20 can be arranged on both sides along the width direction (X-axis direction) of the bulk carrier 100, so as to facilitate the filling or unloading of the ammonia fuel of the bulk carrier 100 without the need to change the position of the bulk carrier 100.

[0051] In some embodiments, as shown in Figure 1 and Figure 2 As shown, the fuel connection room 30 can be connected with the ammonia fuel tank 131 through the pipeline 71, and the fuel connection room 30 can be provided with a valve for controlling all the pipelines 71, so as to control the on-off of the ammonia fuel delivery in the ammonia fuel tank 131.

[0052] In some embodiments, as shown in Figure 2 The nitrogen generating device 41 in the auxiliary equipment room 40 can deliver nitrogen to the fuel tank 13, the main engine 60 and the filling station 20 through the pipeline 71, so as to replace the ammonia waste gas in the ammonia fuel system by means of inerting purging, so as to achieve the effects of inerting, flame retardation, explosion prevention, corrosion prevention and the like, while controlling moisture and pollutants. When the ammonia concentration reaches a preset threshold, the ammonia leakage detection system 42 can trigger the local audible and visual alarm and the remote audible and visual alarm, so as to timely remind the staff to take measures, and effectively improve the safety of the bulk carrier 100.

[0053] In some embodiments, as shown in Figure 2 The fuel preparation room 50 includes a fuel supply unit 51, a fuel valve group 52 and a reliquefaction unit 53. The fuel supply unit 51 can pressurize and temperature-adjust the ammonia fuel; the fuel valve group 52 can adjust the flow of the ammonia fuel and realize an emergency shutdown function; and the reliquefaction unit 53 can reliquefy the gaseous ammonia in the ammonia fuel tank 131 after cooling, so as to reduce the internal pressure of the ammonia fuel tank 131.

[0054] Specifically, the reliquefaction unit 53 cools and liquefies the gaseous ammonia fuel in the fuel tank, the fuel tank can deliver the liquefied ammonia fuel to the fuel supply unit 51, the fuel supply unit 51 can pressurize and temperature-adjust the ammonia fuel, and then the fuel valve group 52 can adjust the flow of the ammonia fuel and deliver it to the main engine 60.

[0055] In some embodiments, as shown in Figure 1 and Figure 2As shown, a gas mast 80 may be provided on the deck 101, and the gas mast 80 is connected to at least one of the filling station 20, the fuel connection room 30, the fuel preparation room 50 and the auxiliary equipment room 40, so that the ammonia waste gas in the equipment room connected to the gas mast 80 can be discharged outside the bulk carrier 100, effectively preventing ammonia from accumulating in the bulk carrier 100, and greatly improving safety.

[0056] Preferably, if Figure 2 As shown, the filling station 20, the fuel connection room 30, the fuel preparation room 50 and the auxiliary equipment room 40 can all be connected to the gas mast 80 to maximize the ammonia exhaust emission performance of the bulk carrier 100 and further improve the safety performance of the bulk carrier 100.

[0057] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A bulk carrier with embedded fuel tanks, characterized in that: A first transverse bulkhead is provided in any original cargo hold of the bulk carrier to separate the original cargo hold into a new cargo hold and a fuel tank. The first transverse bulkhead can be adjusted along the length direction of the bulk carrier to adjust the relative space size between the new cargo hold and the fuel tank.

2. The bulk carrier according to claim 1, characterized in that: An ammonia fuel tank is provided in the fuel tank, and the space size of the fuel tank can be adjusted according to the capacity of the ammonia fuel tank.

3. The bulk carrier according to claim 1, characterized in that: A plurality of the original cargo holds are distributed along the length direction of the bulk carrier, and the first transverse bulkhead is provided at the original cargo hold close to the stern of the bulk carrier.

4. The bulk carrier according to claim 3, characterized in that: A second transverse bulkhead is provided between adjacent original cargo holds, and the second transverse bulkhead can be adjusted along the length direction of the bulk carrier to adjust the relative space size between adjacent original cargo holds.

5. The bulk carrier according to claim 2, characterized in that: A filling station, a fuel connection room, an auxiliary equipment room and a fuel preparation room are provided on the deck of the bulk carrier and along the width direction of the bulk carrier, and a main engine is provided at the stern of the bulk carrier; The filling station, the fuel connection room, the fuel preparation room, the auxiliary equipment room and the main engine are all functionally connected to each other through pipelines.

6. The bulk carrier according to claim 5, characterized in that: The filling station is connected to the ammonia fuel tank through the pipeline, so that external ammonia fuel can be filled into the ammonia fuel tank through the filling station.

7. The bulk carrier according to claim 5, characterized in that: The fuel connecting pipe room is connected to the ammonia fuel tank through the pipeline, and valves for controlling all the pipelines are provided in the fuel connecting pipe room.

8. The bulk carrier according to claim 5, characterized in that: The auxiliary equipment room is equipped with nitrogen generation equipment and ammonia leakage detection system; The nitrogen generating equipment delivers nitrogen to the fuel tank, the main engine and the filling station through the pipeline, so that when the ammonia concentration reaches a preset threshold, the ammonia leakage detection system can trigger an on-site sound and light alarm and a remote sound and light alarm.

9. The bulk carrier according to claim 5, characterized in that: The fuel preparation room includes a fuel supply unit, a fuel valve group and a reliquefaction unit; The reliquefaction unit can cool and liquefy the gaseous ammonia fuel in the fuel tank. The fuel tank delivers the ammonia fuel to the fuel supply unit. The fuel supply unit pressurizes and adjusts the temperature of the ammonia fuel. The regulating fuel valve group adjusts the flow rate of the ammonia fuel and then delivers it to the main engine.

10. The bulk carrier according to claim 5, characterized in that: A gas mast is provided on the deck, and at least one of the filling station, the fuel connection room, the fuel preparation room and the auxiliary equipment room is connected to the gas mast so that ammonia waste gas can be discharged from the bulk carrier through the gas mast.

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