KR102342200B1 - Bunkering Module System and Bunkering Method for a Ship - Google Patents

Abstract

The present invention relates to a modular bunkering system for supplying a liquefied gas fuel to a liquefied gas fuel vessel and a method thereof. The modular bunkering system according to the present invention comprises: a first pump skid including a first LNG pressurizing means and connected to at least two or more LNG storage means; a second pump skid including a second LNG pressurizing means and connected to at least two or more LNG storage means; a supply skid connected to an LNG fuel vessel and configured to supply LNG received from at least one of the first pump skid and the second pump skid to a fuel tank of the LNG fuel vessel; and a bunkering module including the first pump skid, the second pump skid and the supply skid and manufactured in the size of a standard cargo container. The present invention can reduce the time that a liquefied gas fueled vessel is anchored in a port.

Description

Modular Bunkering System and Method for a Ship

The present invention relates to a modular bunkering system and method for supplying liquefied gas fuel to a liquefied gas fuel vessel.

According to the International Maritime Organization (IMO) 2020, regulations on reducing sulfur content in fuel oil of ships are being strengthened, and as air pollution regulations in ports become stricter, LNG (Liquefied Natural Gas) is used as fuel. Demand for LNG fueled ships (LFS) is rapidly increasing.

A fuel tank for storing LNG fuel is provided in the LFS, and it is necessary to repeatedly fill the fuel tank with LNG (bunkering) so that the ship can operate normally according to the operation schedule.

LNG bunkering can be carried out by moving the LFS directly to a port equipped with bunkering facilities during operation or at sea through a bunkering vessel.

The LNG bunkering method for filling the LFS fuel tank with LNG fuel includes a truck-to-ship (TTS) method, a pipe-to-ship (PTS) method, and a ship-to-ship (STS) method.

Republic of Korea Patent Publication No. 10-2078587 (2020.02.19.)

In the bunkering carried out at the port, after connecting the bunkering facility installed on land and the LFS docked at the dock, LNG is transferred from the tank lorry filled with LNG to the fuel tank of the LFS. It is usually done at the same time. Recently, due to the modernization of loading and unloading facilities installed in ports, long-term anchoring has become unnecessary, and long-term anchoring is a factor that should be avoided due to economic reasons such as charter fees.

However, a one tank (about 33m ³⁾ shipping amount is about 30m ³ as possible from, and LNG transfer to LFS fuel tank from one tank is required about one hour, in the case of small and medium predecessors 150m ³ tert LFS, LNG fuel It takes 5 to 6 hours just to transport. In ^{case of large LFS of 1,600m 3} or higher, it takes more time, so STS method at sea is preferred over land bunkering.

In addition, in order to perform bunkering, pre-preparation and waiting time such as flanging work, nitrogen purging, and cool-down to connect the bunkering equipment to the vessel are required. It is almost equal to time.

The inventors of the present invention found that the existing LNG bunkering method takes a long time for shipping and preparation time, which is costly and time-disadvantageous, and not only decreases the usability due to the long operation schedule of the ship, but also the size of the LFS (capacity of the fuel tank) The present invention was derived to solve the problem that it should be applied differently depending on the amount of bunkering and bunkering.

Accordingly, the present invention proposes a dual pump type MTTS (Multi-Truck-to-Ship) modular bunkering system and method that can be applied to various fuel tank capacities of LFS ships and can complete bunkering in a short time. .

According to one aspect of the present invention for achieving the above object, the first pump skid including a first LNG pressurization means and connected to at least two or more LNG storage means; a second pump skid including a second LNG pressurization means and connected to at least two or more LNG storage means; a supply skid connected to the LNG fuel vessel and configured to supply the LNG transferred from at least one of the first pump skid and the second pump skid to the fuel tank of the LNG fuel vessel; and a bunkering module including the first pump skid, the second pump skid and the supply skid and manufactured in the size of a standard cargo container.

Preferably, the first pump skid may connect the first LNG pressurization means to supply LNG from the LNG storage means to the fuel tank, and release the connection when all of the LNG filled in the LNG storage means is exhausted. Including a connection part, the connection part, the supply connection part connected to the LNG storage means; and a preliminary connection unit in a standby state.

Preferably, the preliminary connection unit is connected to a new LNG storage unit while supplying LNG from the LNG storage unit connected to the supply connection unit to the LNG fuel vessel, and means for performing preparatory work from the new LNG storage unit to the LNG fuel vessel. When the supply of LNG from the LNG storage means is completed, LNG may be continuously supplied from the new LNG storage means connected to the LNG fuel vessel.

Preferably, the first LNG pressurization means includes: a first pump for sending LNG from the LNG storage means to the fuel tank while maintaining the same pressure between the two or more LNG storage means and the fuel tank; and a build-up vaporizer that vaporizes a portion of the LNG pressurized by the first pump and returns it to the LNG storage means to generate a pressure difference between the LNG storage means and the fuel tank to send LNG from the LNG storage means to the fuel tank ; may be included.

According to another aspect of the present invention for achieving the above object, the connection step of connecting the modular bunkering system and the fuel tank of the LNG fuel vessel; a bunkering step of bunkering LNG from an LNG storage means to a fuel tank using the modular bunkering system; and a completion step of completing bunkering from the LNG storage means connected to the fuel tank.

Preferably, before the completion step, nitrogen purging using a preliminary connection part to which the LNG storage means is not connected; cooling down using the preliminary connection part after the nitrogen purging; connecting a new LNG storage means filled with LNG to the bunkering module through the preliminary connection part; disconnecting the LNG storage means for which the bunkering has been completed and the bunkering system, and supplying LNG from the LNG storage means connected to the preliminary connection part to the LNG fuel vessel;

The modular bunkering system and method according to the present invention can simultaneously load liquefied gas fuel into a fuel tank using a plurality of LNG storage means.

In addition, since cool-down can be performed in advance before transferring the liquefied gas fuel using the preliminary connection, the bunkering time can be shortened by reducing the loading time and the pre-preparation time for bunkering, so that the liquefied gas fuel vessel is anchored at the port It is possible to reduce the time taken and increase the utilization of the vessel.

In addition, by providing two or more pumps per module, bunkering can be performed continuously without interruption, and the bunkering time can be shortened to suppress the generation of boil-off gas.

In addition, by providing the bunkering system in a modular type of standard specification, the bunkering system can be easily moved to land and sea using a transportation means, and thus bunkering can be performed on land as well as at sea.

In addition, the expansion and reduction of the bunkering system is easy according to the size of the liquefied gas fuel vessel, the capacity of the fuel tank, and the conditions of the port, and thus it is possible to cope with various bunkering amounts.

In addition, since the build-up method can be combined with the pump-type bunkering method, gas generation can be suppressed and the pump can be operated stably.

In addition, when bunkering is performed using several tank lorries in one place, there is a problem that the line connecting the tank lorry and the ship is complicated and dangerous. It is easy to secure a safe space in a complicated port by manufacturing, and it can minimize the cost and promote the convenience of operation.

1 is a schematic diagram illustrating a modular bunkering system according to an embodiment of the present invention.

In order to fully understand the operational advantages of the present invention and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Here, it should be noted that in adding reference signs to the elements of each drawing, the same elements are indicated with the same reference numerals as much as possible even though they are indicated on different drawings.

Hereinafter, the ship in the present invention includes liquefied gas and any type of engine that can use the boil-off gas generated from the liquefied gas as a fuel for an engine for propulsion or power generation, or uses liquefied gas or boil-off gas as a fuel for an engine in the ship. Liquefied Gas Fuel Vessels (LFS) of Offshore structures that do not have propulsion capabilities, such as a Floating Storage Regasification Unit (FSRU), but are floating at sea may also be included.

In addition, the liquefied gas in the present invention may include all kinds of liquefied gas that can be used as a fuel of an engine. Such liquefied gas is, for example, liquefied petrochemicals such as LNG (Liquefied Natural Gas), LEG (Liquefied Ethane Gas), LPG (Liquefied Petroleum Gas), Liquefied Ethylene Gas, Liquefied Propylene Gas, etc. It may be gas. However, in the embodiments to be described later, an example in which LNG, which is one of representative liquefied gases, is applied will be described.

In addition, in an embodiment of the present invention, which will be described later, the engine may be a gas fuel engine capable of using natural gas as a fuel as a dual fuel among engines used in ships, a high-pressure gas injection engine, a medium-pressure gas injection engine, and a low-pressure gas It may include any one or more of the injection engines.

Hereinafter, a modular bunkering system and method according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 1 , the modular bunkering system according to an embodiment of the present invention provides LNG from at least two or more LNG storage means R1 and R2 using a first pump 120 in a bunkering module MD. A first pump skid 100 for discharging and pressurizing, and a second pump skid 200 for discharging and pressurizing LNG from at least two or more LNG storage means I1 and I2 using the second pump 220 and , and a supply skid 300 for transferring the LNG pressurized by any one or more of the first pump 120 and the second pump 220 to the fuel tank T of the LFS ship (S).

In this embodiment, the first pump 120 and the second pump 220 may be centrifugal pumps.

In this embodiment, the first pump skid 100 , the second pump skid 200 and the supply skid 300 may transfer fluid from the LNG storage means R1 , R2 , I1 , I2 to the fuel tank T It includes various pipes or flexible hoses that provide a path to do so, a plurality of valves, and control means such as a plurality of pressure measuring units and pressure signal transmitting units (PT) for controlling the transfer of the fluid.

Each of the lines installed in the bunkering module MD, such as the first supply line L1a and the second supply line L2a, may be a pipe or a flexible hose, and may be insulated.

In this embodiment, the operating temperature range of each line installed in the bunkering module MD may be -196 to 60° C., and the first pump 210 and the second pump 220 may be cryogenic pumps.

In addition, each pipe or flexible hose included in the bunkering module (MD) in this embodiment is a pipe (L5, L6) or , except for some pipes for control purposes, such as a recirculation line (reference numeral not assigned) for controlling the suction pressure of the pumps 120 and 220, etc., all of the LNG storage means (R1, R2, I1, I2) There is no line directed to the fuel tank (T) of (S), and formed to recover the fluid from the fuel tank (T) to the bunkering module (MD) side of the present embodiment.

The fuel tank (T) of the LFS vessel (S) is mainly applied to the C type pressure tank. The boil-off gas or flash gas generated from the fuel tank (T) side is processed in the LFS vessel and is not recovered to the bunker module (MD) side, and the gas generated from the bunker module (MD) side is the bunker module (MD). It is treated in BOG treatment systems such as vent masts on land or ships where it is installed.

In addition, in this embodiment, all control equipment (relay equipment) such as valves or pressure measuring units may be provided to meet the explosion-proof standards and leakage requirements of international standards and international regulations.

Meanwhile, in FIG. 1 , the first pump skid 100 and the second pump skid 200 of this embodiment are respectively connected to two LNG storage means, and the pumps 120 and 220 are respectively transferred from two LNG storage means. It is shown as an example to supply the LNG to the supply skid 300 by pressurizing. However, the present invention is not limited thereto, and the first pump skid 100 and the second pump skid 200 may be connected to two or more storage means, respectively.

However, the pumps 120 and 220 are employed as having an acceptable level of capacity in the port, and the number of LNG storage means connected to the pump skids 100 and 200 depends on the capacity of the pumps 120 and 220 or the allowable flow rate. It could be three or more.

In this embodiment, the capacity range of the first pump 120 and the second pump 220 may be 40 to 130 m ³ /hr, or 40 to 200 m ³ /hr, based on the ISO code of 4 inches in diameter of the pipe. In order to reduce the weight of the bunkering module (MD) while satisfying the ISO code, to minimize the weight of the pipe, preferably, the flow rate of the fluid is 8 m/s. can be adopted.

According to this embodiment, the maximum amount of ^{bunkering once may be 800m 3} , and the maximum time of bunkering once may be 4 hours.

In this embodiment, the LNG storage means, such as tank lorries (R1, R2) and ISO (International Standardizing Organization) standard LNG tank containers (I1, I2), may be transported by land or marine transportation means, Alternatively, it may be a fixed installation tank.

In Figure 1, two tank lorries (R1, R2) are connected to the first pump skid 100, and two LNG tank containers (I1, I2) are connected to the second pump skid 200. The present invention is not limited thereto, and the same type of LNG storage means may be connected to the first pump skid 100 and the second pump skid 200 , or different types of LNG storage means may be connected to each other.

The first pump skid 100 of this embodiment is an LNG storage means filled with LNG, that is, a first supply connection part C1a provided to connect and release the two tank lorries R1 and R2 in this embodiment, respectively. and a second supply connection part C2a, a first vaporization connection part C1b and a second vaporization connection part C2b.

In addition, the second pump skid 200 is an LNG storage means in which LNG is filled, that is, a third supply connection part C3a provided to connect and release the two tank containers I1 and I2 in this embodiment, respectively. and a fourth supply connection part C4a, a third vaporization connection part C3b and a fourth vaporization connection part C4b.

The first supply connection part (C1a) is connected to the first pump 120 and the first supply line (L1a), and the second supply connection part (C2a) is connected to the first pump 120 and the second supply line (L2a). The third supply connection part (C3a) is connected by the second pump 220 and the third supply line (L3a), and the fourth supply connection part (C4a) is the second pump 220 and the fourth supply line. connected by (L4a).

For example, when the first supply connection part C1a is connected to the first tank lorry R1, the fluid discharged from the first tank lorry R1, that is, LNG, is the first pump 120 along the first supply line L1a. , and when the second supply connection part C2a is connected to the second tank lorry R1, the LNG discharged from the second tank lorry R2 is transferred to the first pump 120 along the second supply line L2a. can

According to this embodiment, the first pump skid 100 is connected to a first supply line (L1a) and a second supply line (L2a), and a seventh supply line (L7) to be described later, and a first supply line ( The first integration part M1 which is a manifold that integrates the LNG transferred from the first tank lorry R1 through L1a and the LNG transferred from the second tank lorry R2 through the second supply line L2a into one flow. ), and may further include a seventh supply line (L7) connecting the first integrated part (M1) and the first pump (120).

In addition, the first pump skid 100 vaporizes a portion of the LNG flow pressurized by the first pump 120 to re-supply to any one or more of the first tank lorry (R1) and the second tank lorry (R2). 1 It further includes a build-up vaporizer 110 .

Some of the LNG pressurized by the first pump 120 is branched from the seventh supply line L7 downstream of the first pump 120 and connected to the first build-up vaporizer 110 in a fifth vaporization line ( It is transferred to the first build-up carburetor 110 along L5).

The natural gas vaporized in the first build-up vaporizer 110 is a first vaporization line (L1b) and a first build-up vaporizer 110 connecting the first build-up vaporizer 110 and the first vaporization connection part (C1b) It may be re-supplied to at least one of the first tank lorry R1 and the second tank lorry R2 through the second vaporization line L2b connecting the and the second vaporization connection part C2b.

According to this embodiment, by the first build-up carburetor 110, by increasing the internal pressure of the tank lorry (R1, R2), so that the fluid flow from the tank lorry (R1, R2) to the supply skid 300 is made smoothly and the suction pressure of the first pump 120 may be stably maintained.

Similarly, when the third supply connection part C3a is connected to the first tank container I1, the LNG discharged from the first tank container I1 is transferred to the second pump 220 along the third supply line L3a. When the fourth supply connection part C4a is connected to the second tank container I2, the LNG discharged from the second tank container I2 is transferred to the second pump 220 along the fourth supply line L4a. can be

In addition, the second pump skid 200 is connected to a third supply line (L3a) and a fourth supply line (L4a), and an eighth supply line (L8) to be described later, and through a third supply line (L3a) A second integration unit M2, which is a manifold that integrates the LNG transferred from the first tank container I1 and the LNG transferred from the second tank container I2 through the fourth supply line L4a into one flow, and , it may further include an eighth supply line (L8) connecting the second integration unit (M2) and the second pump (220).

The second pump skid 100 vaporizes a portion of the LNG flow pressurized by the second pump 220 and re-supplys it to any one or more of the first tank container I1 and the second tank container I2. 2 It further includes a build-up vaporizer 210 .

Some of the LNG pressurized by the second pump 220 is branched from the eighth supply line L8 downstream of the second pump 220 and connected to the second build-up vaporizer 210 in the sixth vaporization line ( It is transferred to the second buildup vaporizer 210 along L6). The natural gas vaporized in the second build-up vaporizer 210 is a third vaporization line (L3b) and a second build-up vaporizer 210 connecting the second build-up vaporizer 210 and the third vaporization connection part C3b. and the fourth vaporization line L4b connecting the fourth vaporization connection part C4b to one or more of the first tank container I1 and the second tank container I2 may be re-supplied.

According to this embodiment, by increasing the internal pressure of the tank containers (I1, I2) by the second build-up carburetor 210, so that the fluid flow from the tank containers (I1, I2) to the supply skid (300) is made smoothly can do.

In addition, the first pump skid 100 according to this embodiment is branched from the seventh supply line (L7) downstream of the first pump 120 and merges into the seventh supply line (L7) upstream of the first pump 120 It may further include a first recirculation line (reference numeral not given), the second pump skid 200 is branched from the eighth supply line (L8) downstream of the second pump 220, the second pump 220 It may further include a second recirculation line (reference numeral not assigned) joined to the upstream eighth supply line (L8).

When the first pump 120 and the second pump 220 cannot be used, such as power is not supplied, or a situation in which pump-type bunkering is impossible occurs, the controller controls the first recirculation valve and the second By opening any one or more of the second recirculation valves provided in the recirculation line, it is possible to control so that differential pressure loading is possible.

As such, according to the present embodiment, if necessary, some of the LNG is vaporized using the build-up vaporizers 110 and 210, and the pressure generated at this time overcomes the head difference and loss head, and the LNG is transferred to the LFS vessel (S). A build-up method for bunkering and a pump-type method using the pumps 120 and 220 can be selectively used.

On the other hand, the fluid between the fifth supply line (L5) and the sixth supply line (L6) is connected by a tenth supply line (L10) connecting the fifth supply line (L5) and the sixth supply line (L6), between the fifth supply line (L5) and the sixth supply line (L6) flow can be allowed.

For example, when the first pump 120 cannot be operated normally, the LNG flow pressurized by the second pump 220 by opening the valve provided in the tenth supply line L10 is transferred to the first vaporizer 110. can be supplied with

1, the 10th supply line (L10) is shown to connect the 5th supply line (L5) and the 6th supply line (L6) downstream of the 1st pump 120 and the 2nd pump 220, but limited to this It is not, and the tenth supply line L10 pressurizes LNG using the other operable pumps 120 and 220 when either one of the first pump 120 and the second pump 220 cannot be used. It may be connected to supply a portion of the flow to the build-up vaporizer (110, 210).

In general, when unloading LNG, the trailer is equipped with a carburetor. If the target pressure, for example, about 7 kg/cm ² can be satisfied with the conventional carburetor mounted on the trailer, the build-up carburetors 110 and 210 of the present embodiment can be omitted.

The supply skid 300 according to this embodiment is a third integrated part M3 that is a manifold that integrates the flow of LNG transferred from the first pump skid 100 and the second pump skid 200 into one flow. and a fifth connection part (C5) provided to be connected to and released from the fuel tank (T) of the LFS vessel (S) requiring LNG bunkering, and the third integration part (M3) and the fifth connection part (C5) are It is connected by the ninth supply line (L9).

The LNG flow discharged from the third integration unit M3 along the ninth supply line L9 and directed to the LFS vessel S connects the fifth connection unit C5 and the fuel tank T of the LFS vessel S. It is stored in the fuel tank T along the fuel supply line LL.

A flow meter 310 may be installed in the ninth supply line L9, and the flow rate of LNG transferred from the third integration unit M3 to the fuel tank T may be measured.

LNG is no longer supplied from any one or more of the first tank lorry R1 and the second tank lorry R2 to the first pump 120 such that the LNG filled in the first tank lorry R1 and the second tank lorry R2 is exhausted. If transport is not possible, the supply may be started by disconnecting the respective supply connections C1a, C2a and the respective vaporization connections C1b, C2b, and connecting to a new tank lorry filled with LNG.

Similarly, the second pump ( 220), disconnect each supply connection (C3a, C4a) and each vaporization connection (C3b, C4b), and connect to a new tank container filled with LNG to start supply.

On the other hand, in the first pump skid 100 according to an embodiment of the present invention, the first integral part M1 and the first reserve line L1r are connected to each other, and the first reserve that can be connected to and released from the LNG storage means. A second preliminary connection part C2r which is connected to the connection part C1r and the first integration part M1 and the second preliminary line L2r and can be connected to and released from the LNG storage means is provided.

In addition, in the second pump skid 200 , the second integration part M2 and the third preliminary line L3r are connected by a third preliminary connection part C3r and the second integration that can be connected and released with the LNG storage means. It is connected by the part M2 and the fourth preliminary line L4r and is provided with a fourth preliminary connection part C4r that can be connected to and released from the LNG storage means.

Although not shown in the drawings, the first to fourth preliminary connection portions C1r, C2r, C3r, and C4r include preliminary connection portions corresponding to the first to fourth supply connection portions C1a, C2a, C3a, and C4a, respectively, and , may include all of the preliminary connection portions respectively corresponding to the first to fourth vaporization connection portions C1b, C2b, C3b, and C4b described above.

That is, according to the present embodiment, the first pump skid 100 and the second pump skid 200 may be simultaneously connected to four or up to eight LNG storage means, and the first pump 210 and the second pump ( 220) can simultaneously receive LNG from 4 units, up to 8 units of LNG storage means, and transfer it to the third integrated unit M3.

In particular, in this embodiment, the preliminary connection parts (C1r, C2r, C3r, C4r) can be used as a means to continuously supply LNG from the bunkering module (MD) to the LFS vessel (S) according to the present embodiment. .

For example, in this embodiment, when all of the four LNG storage means (R1, R2, I1, I2) are connected to the supply connection parts (C1a, C2a, C3a, C4a), respectively, and LNG is being supplied to the LFS vessel (S) , connect the new LNG storage means filled with LNG with the preliminary connection parts (C1r, C2r, C3r, C4r) and perform a series of operations such as cooling down necessary before supplying LNG to the LFS vessel (S) in advance, , C2a, C3a, C4a) When the supply of LNG from the LNG storage means (R1, R2, I1, I2) is completed, immediately from the LNG storage means connected to the preliminary connection part (C1r, C2r, C3r, C4r) LNG can be supplied to LFS vessels (S).

In the first pump skid 100, when the LNG storage means is connected to each of the first supply connection part (C1a) and the second supply connection part (C2a) to perform bunkering with the fuel tank (T), the first preliminary connection part ( C1r) and the second preliminary connection part (C2r) are used to prepare the supply such as nitrogen purging and cool-down of the first pump skid 100 such as the first preliminary line (L1r) and the second preliminary line (L2r). , after the supply from the LNG storage means connected to the first supply connection part C1a and the second supply connection part C2a is finished, the new LNG storage means is connected to the first preliminary connection part C1r and the second preliminary connection part C2r It is possible to continuously supply LNG fuel to the fuel tank (T).

At this time, when the connection between the first supply connection part (C1a) and the second supply connection part (C2a) and the LNG storage means is released, the supply preparation work is performed through the first supply connection part (C1a) and the second supply connection part (C2a). Then, when the fuel supply through the first preliminary connection part C1r and the second preliminary connection part C2r is finished, a new LNG storage means is connected to the first supply connection part C1a and the second supply connection part C2a to continuously supply LNG fuel. can supply

The preliminary connection parts (C1r, C2r, C3r, C4r) of this embodiment are placed in a standby state when performing LNG bunkering using the supply connection parts (C1a, C2a, C3a, C4a), thereby eliminating bunkering preparatory work and waiting time, or can be shortened

As described above, according to the present embodiment, by providing the first preliminary connection part C1r and the second preliminary connection part C2r, the bunkering operation and the fuel supply preparation operation such as nitrogen purging or cool-down can be performed at the same time, so that bunkering is reduced. It can be performed continuously and rapidly.

Meanwhile, in the present embodiment, the first preliminary connection part C1r, the second preliminary connection part C2r, the third preliminary connection part C3r, and the fourth preliminary connection part C4r are the first supply connection part C1a, the second supply connection part (C2a), the third supply connection (C3a), and the fourth supply connection (C4a) may serve as a redundancy, and may be used for the purpose of maintenance.

In addition, a purging unit for supplying nitrogen for purging to each of the lines installed in the bunkering module MD and the first merging unit M1 , the second merging unit M2 and the third merging unit M3 . (reference numeral not assigned) may be provided.

In addition, the first safety valve EV1 is provided upstream of the first pump 120 of the seventh supply line L7 of this embodiment, and the second pump 220 is provided upstream of the eighth supply line L8. 2 safety valve EV2 may be provided.

The first safety valve EV1 and the second safety valve EV2 may be emergency shutdown valves, and the discharge pressure of the first pump 120 and the discharge pressure of the second pump 220 are controlled using a control unit (not shown). measurement, and when the pressure measurement value is higher than the set value, it can be automatically shut off using the first safety valve EV1 and the second safety valve EV2. The first safety valve EV1 and the second safety valve EV2 are provided to be manually shut off in an emergency.

In the ISO code (ISO 20519 5.4.5), if the discharge flow rate of the pump is 150m ³ /hr or less, ERS (Emergency Response Service) and ESD (Emergency Shut-Down) Link system can be omitted and operated, but this practice In the example, including the first safety valve EV1 and the second safety valve EV2, it is possible to respond to various flow rates.

The bunkering module (MD) of this embodiment is connected to several LNG storage means (R1, R2, I1, I2) at the same time can shorten the bunkering time to the LFS vessel (S).

In addition, since at least one bunkering module MD according to this embodiment may be provided, and two or more pump skids 100 and 200 may be provided in the bunkering module MD, the fuel tank of the LFS vessel S ( The bunkering capacity can be freely increased or decreased according to the capacity of T) or the situation of the place (port or ship) where the bunkering system according to the present embodiment is provided.

On the other hand, it is effective that different methods are applied to the bunkering system according to the fuel tank (T) capacity of the LFS vessel (S).

For ^{small ships of less than 150m 3} class, the differential pressure TTS (truck-to-ship) method of the buildup method using the carburetor is effective, and in the case of 150 to 1,600m ^{class 3} medium-sized ships, the TTS method using a pump is effective The STS (ship-to-ship) method is known to be effective in the case of large and extra-large ships of ^{1,600m 3 or more.}

According to this embodiment, if necessary, both the build-up method of vaporizing some LNG, overcoming the head difference and loss head with the pressure generated at this time, and bunkering the LNG with the LFS vessel (S) and the pump-type method using a pump Because it can be utilized, LNG bunkering can be performed with all types of LFS vessels regardless of the type of fuel tank of the vessel.

Since the saturation temperature increases as the pressure of the fluid increases, the generation of BOG is suppressed as the pressure of the LNG increases. When the LNG face pressure of the LNG storage means (R1, R2, I1, I2) is higher than the LNG face pressure of the fuel tank (T) of the LFS vessel (S), the head difference increases. It is necessary to increase the liquid level pressure, but there is a limit to the design pressure that the LNG storage means can withstand, and since the LNG liquid level pressure in the fuel tank is relatively small, the saturation temperature is low, and thus the amount of BOG is increased. This phenomenon is maximized the larger the LFS vessel is. BOG from onboard tanks has to be treated by itself, such as discharging it to the atmosphere, but if the vessel is large, the amount will increase, making it impossible to meet the Emsission Zero requirement, a regulation on the emission of pollutants from ships, which is a trend that has become stricter in recent years.

In other words, if the bunkering system is provided only with differential pressure, it is limited to bunker LNG to large ships.

On the other hand, pump-type bunkering using centrifugal pumps 120 and 220 generally stores boil-off gas generated in the fuel tank (T) of the LFS vessel (S) in order to prevent the emission of boil-off gas to the atmosphere in the bunkering system. It is a method of recovering by means (R1, R2, I1, I2) and bunkering with a fuel tank by overcoming the head difference and loss head by pumping up the centrifugal pump.

That is, in this method, the LNG liquid level pressure of the LNG storage means and the LNG liquid level pressure of the fuel tank are almost equal. In the case of this method, a build-up process is still required to increase the pressure in the LNG storage means by vaporizing a part of the LNG, but the pressure increase by the build-up process suppresses the amount of BOG and suction of the centrifugal pumps 120 and 220 It is used to prevent cavitation by maintaining pressure. Nevertheless, as the LNG pressure in the fuel tank becomes relatively high as a result, the generation of BOG is eventually suppressed, and BOG is not discharged from the fuel tank to the atmosphere, so the Emission Zero requirement can be satisfied.

As such, according to the present invention, both the build-up vaporizers 110 and 210 and the centrifugal pumps 210 and 220 are provided so that the differential pressure method and the pump method can be selectively used, but the build-up vaporizers 110 and 210 By this, it is possible to achieve stabilization of pump operation, such as satisfying the suction pressure of the centrifugal pumps 210 and 220, to sufficiently maintain the pressure of the entire system, and to suppress the generation of boil-off gas during bunkering. .

In addition, by providing the build-up vaporizers 110 and 210, it is possible to utilize the tank containers I1, I2 of the ISO standard.

In addition, it is preferable that the bunkering module (MD) of this embodiment is manufactured in a 20ft standard container standard. Accordingly, the bunkering module (MD) of the present embodiment can be moved at any time in accordance with the standards of land and sea transportation means, thereby maximizing mobility, and reducing volume and weight and compact design.

It is apparent to those of ordinary skill in the art that the present invention is not limited to the above embodiments, and that various modifications or variations can be implemented without departing from the technical gist of the present invention. did it

100: first pump skid 200: second pump skid
C1a: first supply connection C3a: third supply connection
C2a: second supply connection C4a: fourth supply connection
C1b: first vaporization connection C3b: third vaporization connection
C2b: second vaporization connection part C4b: fourth vaporization connection part
C1r: first preliminary connection C3r: third preliminary connection
C2r: second preliminary connection part C4r: fourth preliminary connection part
110: first build-up vaporizer 210: second build-up vaporizer
120: first pump 220: second pump
M1: first integrated part M2: second integrated part
EV1: 1st safety valve EV2: 2nd safety valve
300: supply skid MD: bunkering module
C5: 5th connection part R1, R2, I1, I2: LNG storage means
M3 : 3rd integrated part S : LFS vessel
310: flow meter T: fuel tank

Claims (6)

a first pump skid including a first LNG pressurization means and connected to at least two or more LNG storage means;
a second pump skid including a second LNG pressurization means and connected to at least two or more LNG storage means;
a supply skid connected to the LNG fuel vessel and configured to supply LNG received from at least one of the first pump skid and the second pump skid to the fuel tank of the LNG fuel vessel; and
Including; and a bunkering module including the first pump skid, the second pump skid and the supply skid and manufactured in the size of a standard cargo container;
It includes one or more of the bunkering modules,
The first pump skid,
a connection unit that connects the first LNG pressurization means to supply LNG from the LNG storage means to the fuel tank and releases the connection when all of the LNG filled in the LNG storage means is exhausted;
The connection part,
a supply connection unit connected to the LNG storage means; and
Including a preliminary connection unit in the standby state;
The preliminary connection part,
While supplying LNG from the LNG storage means connected to the supply connection part to the LNG fuel vessel, it is connected to the new LNG storage means and is used as a means for carrying out the preparation work from the new LNG storage means to the LNG fuel vessel, and from the LNG storage means A modular bunkering system that continuously supplies LNG from a new connected LNG storage means to an LNG fuel vessel when LNG supply is complete. delete delete The method according to claim 1,
The first LNG pressurization means,
a first pump for sending LNG from the LNG storage means to the fuel tank while maintaining the same pressure of the two or more LNG storage means and the fuel tank; and
A build-up vaporizer that vaporizes a portion of the LNG pressurized by the first pump and returns it to the LNG storage means to generate a pressure difference between the LNG storage means and the fuel tank, and sends LNG from the LNG storage means to the fuel tank ; Including, modular bunkering system. A connection step of connecting the modular bunkering system of any one of claims 1 and 4 to the fuel tank of the LNG fuel vessel;
a bunkering step of bunkering LNG from an LNG storage means to a fuel tank using the modular bunkering system; and
A modular bunkering method comprising; a completion step of completing bunkering from the LNG storage means connected to the fuel tank. 6. The method of claim 5,
Before the completion step,
purging nitrogen using a preliminary connection part to which the LNG storage means is not connected;
cooling down using the preliminary connection part after the nitrogen purging;
connecting a new LNG storage means filled with LNG to the bunkering module through the preliminary connection part;
The step of disconnecting the LNG storage means for which the bunkering has been completed and the bunkering system, and supplying LNG from the LNG storage means connected to the preliminary connection part to the LNG fuel vessel;

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