JP7436330B2 - Liquid feeding plan creation device and method, and liquefied gas liquid feeding support system - Google Patents

Description

The present invention relates to a liquid transfer plan creation device and method for creating a liquid transfer plan for sending liquefied gas from a supply tank to a receiving tank, and a liquefied gas liquid transfer support system including the liquid transfer plan creation device.

In recent years, with the significant tightening of exhaust gas regulations, ships fueled by liquefied gases such as LNG (liquefied natural gas) and LPG (liquefied petroleum gas), which have a smaller environmental impact than heavy oil (hereinafter referred to as ``liquefied gas fueled ships''), have been introduced. ) is rapidly becoming popular. In line with this, the development of bunkering bases for liquefied gas fueled ships is underway. Because liquefied gas fuels are often handled at temperatures lower than room temperature, there are various restrictions on bunkering.

Bunkering methods for liquefied gas fuel ships include the Truck to Ship method, which refuels from a tank truck on land, the Shore to Ship method, which refuels directly from a fuel base on land, and the Ship to Ship method, which refuels from a fuel gas supply ship (bunker ship). etc. are known. For example, in the Ship to Ship method, a fuel gas supply vessel is moored to a liquefied gas fueled vessel moored or anchored at a quay or pier, and a flexible hose or loading arm is used to connect the receiving piping of the liquefied gas fueled vessel to the fuel gas supply vessel. A fuel supply line is formed by connecting the fuel supply pipe with the fuel supply pipe, and after the inside of the fuel supply line is air-purged with nitrogen, the fuel supply line is cooled down, and then liquid feeding is started (see Non-Patent Document 1).

Noriyuki Aoyama, “LNG Bunkering Procedures and Safety Requirements”, Journal of the Japan Society of Marine Engineering, 2016, Volume 51, No. 1, pp. 12-16

Current LNG bunkering relies on the experience of LNG suppliers and workers (sailors) to determine whether or not to cool down the fuel supply line and fuel storage tank associated with bunkering and to estimate the required time.

The present invention was made in view of the above circumstances, and its purpose is to create an appropriate liquid transfer plan when transferring liquefied gas from a supply tank to a receiving tank without relying on the skill of suppliers or workers. An object of the present invention is to propose a device and method for creating a liquid feeding plan, and a liquefied gas liquid feeding support system that utilizes this liquid feeding plan.

A liquid feeding plan creation device according to one aspect of the present disclosure is a liquid feeding plan creation device that generates a liquid feeding plan for feeding liquefied gas from a supply tank to a receiving tank through a liquid feeding line connected to the receiving tank. And,
Receiving side information including tank performance information regarding the performance of the receiving tank and tank status information regarding the status of the liquefied gas contained in the receiving tank, and supply side status regarding the status of the liquefied gas fed from the supply tank. an information acquisition unit that acquires supply side information including information;
a situation prediction unit that calculates a predicted value of information representing the situation of at least a part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
a liquid feeding plan creation unit that creates the liquid feeding plan based on the calculated predicted value ,
The situation prediction unit is configured to calculate the predicted value by simulating at least part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information. It is characterized by having a simulation model .
A liquid feeding plan creation device according to another aspect of the present disclosure includes a liquid feeding plan that generates a liquid feeding plan for feeding liquefied gas from a supply tank to a receiving tank through a liquid feeding line connected to the receiving tank. A creating device,
Receiving side information including tank performance information regarding the performance of the receiving tank and tank status information regarding the status of the liquefied gas contained in the receiving tank, and supply side status regarding the status of the liquefied gas fed from the supply tank. an information acquisition unit that acquires supply side information including information;
a situation prediction unit that calculates a predicted value of information representing the situation of at least a part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
a liquid feeding plan creation unit that creates the liquid feeding plan based on the calculated predicted value,
The situation prediction unit is characterized by having at least one trained model configured to derive the predicted value from the receiving side information and the supplying side information.
A liquid feeding plan creation device according to yet another aspect of the present disclosure is configured to generate a liquid feeding plan for feeding liquefied gas from a supply tank to a receiving tank through a liquid feeding line connected to the receiving tank. A planning device,
Receiving side information including tank performance information regarding the performance of the receiving tank and tank status information regarding the status of the liquefied gas contained in the receiving tank, and supply side status regarding the status of the liquefied gas fed from the supply tank. an information acquisition unit that acquires supply side information including information;
a situation prediction unit that calculates a predicted value of information representing the situation of at least a part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
a liquid feeding plan creation unit that creates the liquid feeding plan based on the calculated predicted value,
The situation prediction unit includes a precooling prediction unit that predicts at least one of liquefied gas consumption, precooling time, and labor regarding precooling of at least one of the receiving tank and the liquid sending line,
The liquid feeding plan is characterized in that it includes information predicted by the precooling prediction unit.

Furthermore, the liquefied gas feeding support system according to one aspect of the present invention includes:
The above-mentioned liquid feeding plan creation device,
a liquid feeding pump that sends the liquefied gas from the supply tank to the liquid feeding line;
The measured values of the pressure and liquid level of the receiving tank and the liquid feeding plan created by the liquid feeding plan creation device are acquired, and the liquid feeding is performed based on the measured values of the pressure and the liquid level according to the liquid feeding plan. and a supply side terminal configured to operate a liquid pump.

Further, a liquid feeding plan creation method according to one aspect of the present disclosure includes a liquid feeding plan that generates a liquid feeding plan for feeding liquefied gas from a supply tank to a receiving tank through a liquid feeding line connected to the receiving tank. A method of creating
Receiving side information including tank performance information regarding the performance of the receiving tank and tank status information regarding the status of the liquefied gas contained in the receiving tank, and supply side status regarding the status of the liquefied gas fed from the supply tank. an information acquisition step of acquiring supply side information including the information;
a situation prediction step of obtaining a predicted value of information representing the situation of at least a part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
a liquid feeding plan creation step of creating the liquid feeding plan based on the calculated predicted value ,
The situation prediction step is characterized in that the step includes simulating at least part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information to obtain the predicted value. .
A liquid feeding plan creation method according to another aspect of the present disclosure includes a liquid feeding plan that generates a liquid feeding plan for feeding liquefied gas from a supply tank to a receiving tank through a liquid feeding line connected to the receiving tank. A method of creating
Receiving side information including tank performance information regarding the performance of the receiving tank and tank status information regarding the status of the liquefied gas contained in the receiving tank, and supply side status regarding the status of the liquefied gas fed from the supply tank. an information acquisition step of acquiring supply side information including the information;
a situation prediction step of obtaining a predicted value of information representing the situation of at least a part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
a liquid feeding plan creation step of creating the liquid feeding plan based on the calculated predicted value,
The situation prediction step is characterized in that it includes deriving the predicted value from the receiving side information and the supplying side information using at least one trained model.
A method for creating a liquid transfer plan according to yet another aspect of the present disclosure includes generating a liquid transfer plan for sending liquefied gas from a supply tank to a receiving tank through a liquid sending line connected to the receiving tank. A method for creating a plan,
Receiving side information including tank performance information regarding the performance of the receiving tank and tank status information regarding the status of the liquefied gas contained in the receiving tank, and supply side status regarding the status of the liquefied gas fed from the supply tank. an information acquisition step of acquiring supply side information including the information;
a situation prediction step of obtaining a predicted value of information representing the situation of at least a part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
a liquid feeding plan creation step of creating the liquid feeding plan based on the calculated predicted value,
The situation prediction step is characterized in that it includes predicting at least one of liquefied gas consumption, precooling time, and labor for precooling at least one of the receiving tank and the liquid sending line.

In the liquid feeding plan creation device and method configured as described above, a predicted value of information representing the status of at least a part of the liquid feeding process and its preparation process is generated using the receiving side information and the supply side information, and this predicted value A liquid feeding plan is created based on this. In this way, according to the liquid feeding plan creation device and method configured as described above, it is possible to generate a liquid feeding plan that does not rely on the skills of suppliers or workers. In addition, by predicting the status of at least part of the liquid transfer process and its preparation process, inefficient operations can be omitted and waiting time can be reduced, and the time required for liquid transfer and its preparation can be shortened. It becomes possible. This makes it possible to streamline operations on the supply side and on the receiving side.

In addition, in the liquefied gas liquid feeding support system configured as described above, the supply side terminal operates equipment related to liquid feeding (i.e., liquid feeding pump and liquid feeding valve) based on the liquid feeding plan created as described above. let As a result, the labor of the workers on the supply side and the receiving side can be reduced, and variations in operation caused by differences in the skills of the workers on the supply side and the receiving side can be reduced.

According to the present invention, when transferring liquefied gas from a supply tank to a receiving tank, there is provided a liquid transfer plan creation device and method for creating an appropriate liquid transfer plan without relying on the skills of suppliers or workers, and It is possible to propose a liquefied gas liquid feeding support system that utilizes a liquid feeding plan.

FIG. 1 is a diagram illustrating a schematic configuration of a liquefied gas feeding support system according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating liquefied gas receiving-side equipment and supply-side equipment. FIG. 3 is a functional block diagram of the liquid feeding plan creation device. FIG. 4 is a flowchart of the liquid feeding plan creation process. FIG. 5 is a diagram showing the configuration of a control system by the supply side terminal during liquid feeding. FIG. 6 is a diagram showing the flow of processing at the supply side terminal during liquid feeding. FIG. 7 is a functional block diagram of a liquid feeding plan creation device according to a modified example. FIG. 8 is a diagram showing the configuration of the learning device and its surroundings.

The liquefied gas feeding support system 100 according to the present invention supports the operation of feeding liquefied gas from a supply tank provided on the supply side to a receiving tank provided on the receiving side. The supply tank and the receiving tank are basically liquefied gas tanks capable of storing liquefied gas at a temperature lower than room temperature. Examples of the liquefied gas include LNG and LPG. For example, when the receiving tank is an LNG fuel storage tank of an LNG fueled ship, the supply tank is an LNG fuel storage tank installed on an LNG fuel supply ship (LNG bunker ship), an LNG gas bunkering pontoon, or an LNG bunkering barge. It may be. Further, for example, when the receiving tank is an LNG tank installed on land or at sea, the supply tank may be a cargo handling tank mounted on an LNG fuel ship. In this manner, the present invention is not limited to the embodiments described below, but can be applied to liquid delivery of liquefied gas.

FIG. 1 is a diagram illustrating a schematic configuration of a liquefied gas feeding support system 100 according to an embodiment of the present invention. FIG. 1 shows a liquefied gas fuel ship 3 on the liquefied gas receiving side and a liquefied gas supply ship 4 on the liquefied gas supply side. The liquefied gas is supplied from the supply tank 40 of the liquefied gas supply ship 4 to the receiving tank 30 of the liquefied gas fuel ship 3. The liquid feeding support system 100 includes a receiving terminal 6 mounted on the liquefied gas fuel ship 3, a supplying terminal 7 mounted on the liquefied gas supply ship 4, and a liquid feeding plan creation device 8.

[Equipment on the receiving side]
FIG. 2 is a block diagram illustrating liquefied gas receiving-side equipment and supply-side equipment. As shown in FIG. 2, the receiving side liquefied gas fuel ship 3 is a ship that uses liquefied gas as fuel, and includes a receiving side terminal 6 and a fuel storage tank as a receiving tank 30.

The receiving tank 30 is provided with a tank cooling device 39 . Tank cooling device 39 may be, for example, but not limited to, a conventional spray cooling device. The spray type cooling device pumps up the liquefied gas stored in the receiving tank 30 and sprays it from the top of the tank, thereby forcibly vaporizing the liquefied gas and lowering the temperature inside the tank.

A liquid sending line 35 and a return gas line 36 are connected to the receiving tank 30 . The liquid feeding line 35 is composed of a manifold, piping, and the like. This piping includes piping accessories such as valves and joints, including the liquid sending valve 351 (see FIG. 5). A pipe cooling device 38 is provided in the liquid feeding line 35 . The piping cooling device 38 is not particularly limited, but may be, for example, a conventional cooling gas flow type cooling device. The cooling gas conduction type cooling device conducts low-temperature gas (for example, vaporized gas or liquefied gas in the receiving tank 30 or vaporized gas or liquefied gas in the supply tank 40) to the liquid feeding line 35. It lowers the temperature of The return gas line 36 is composed of a manifold, piping, and the like. This piping includes piping accessories such as valves and joints, including a return valve 361 (see FIG. 5).

The receiving tank 30 is provided with a liquid level gauge 31, a thermometer 32, and a pressure gauge 33. The liquid level gauge 31 measures the liquid level of the liquefied gas stored in the receiving tank 30. The remaining amount of liquefied gas can be determined based on the measured liquid level and the shape and volume of the tank included in the tank performance information. The thermometer 32 measures the temperature inside the receiving tank 30 (liquid temperature of the liquefied gas). The pressure gauge 33 measures the pressure inside the receiving tank 30. A piping thermometer 34 is provided in the liquid feeding line 35 . The piping thermometer 34 measures the temperature inside the piping (piping temperature) that constitutes the liquid feeding line 35 .

The receiving terminal 6 is constituted by a computer including a processor, memory such as ROM and RAM, and an I/O section (all not shown). The processor of the receiving terminal 6 is electrically connected to a wireless communication device 61, a wired communication device 62, a storage device 63, and an output device 64 via an I/O section. The wireless communication device 61 can transmit and receive information to and from other information devices, for example, via the communication satellite 9 (or wirelessly). The wired communication device 62 can send and receive information to and from other information devices connected to the wired communication line via the wired communication line. The storage device 63 stores identification information of the liquefied gas fueled ship 3, a voyage plan, tank performance information, acceptance history information, and the like. The tank performance information includes information regarding the number, type, external shape, volume, and ancillary equipment of the receiving tanks 30. The information related to the incidental equipment includes the type and performance of the tank cooling device 39, the configuration of the liquid feeding line 35, and the type and performance of the pipe cooling device 38. The reception history information includes a history of the date and time, location, amount, fuel composition, and fuel consumption of reception of liquefied gas into the reception tank 30 (i.e., bunkering).

The receiving terminal 6 is electrically connected to a liquid level gauge 31, a thermometer 32, a pressure gauge 33, and a pipe thermometer 34. The receiving terminal 6 acquires information measured by a liquid level gauge 31, a thermometer 32, a pressure gauge 33, and a pipe thermometer 34.

The receiving side terminal 6 generates receiving side information using the information measured by the liquid level gauge 31, the thermometer 32, the pressure gauge 33, and the pipe thermometer 34, and the information read from the storage device 63. The receiving side terminal 6 sends the generated receiving side information and liquid feeding request to the liquid feeding plan creation device 8 via the wireless communication device 61.

The receiving side information includes at least tank performance information and tank status information. The receiving side information may further include identification information of the liquefied gas fuel ship 3 and receiving history information. The tank status information includes the pressure of the receiving tank 30, the temperature of the liquefied gas, the composition of the liquefied gas, and the piping temperature. The composition of the liquefied gas stored in the receiving tank 30 naturally evaporates from light components due to heat input from the outside, so the composition changes as the liquefied gas becomes heavier depending on the number of days that have passed since loading (however, (Excluding when accumulating pressure). The composition of the liquefied gas included in the tank status information may be estimated to be heavier depending on the number of days that have passed since the previous reception (and the pressure history of the receiving tank 30).

[Supply side equipment]
The liquefied gas supply ship 4 is a ship (so-called bunker ship) that supplies liquefied gas fuel to the liquefied gas fuel ship 3, and includes a supply side terminal 7 and a supply tank 40.

A liquid feeding line 45 and a return gas line 46 are connected to the supply tank 40 . The liquid feeding line 45 includes a liquid feeding pump 48, a manifold, a loading arm (or a flexible hose), an emergency disconnection device, piping, and the like. The liquid feeding line 45 is connected to the liquid feeding line 35 on the receiving side. The liquefied gas stored in the supply tank 40 is sent to the receiving tank 30 through the liquid sending lines 45 and 35.

The return gas line 46 includes a loading arm (or flexible hose), a compressor 49, piping, and the like. The return gas line 46 is connected to the return gas line 36 on the receiving side. Through the return gas lines 46 and 36, gas corresponding to the volume replacement of the liquefied gas received by the receiving tank 30 and boil-off gas generated by heat input from the pump and piping are transferred from the receiving tank 30 to the supply tank 40 as return gas. Sent. The amount of return gas is adjusted by the load on the compressor 49. The return gas is recovered in the supply tank 40, and a portion is incinerated in a GCU (Gas Combustion Unit) 47.

The supply side terminal 7 is constituted by a computer including a processor, memory such as ROM and RAM, and an I/O section (all not shown). The processor of the supply terminal 7 is electrically connected to a wireless communication device 71, a wired communication device 72, a storage device 73, and an output device 74 via an I/O section. The wireless communication device 71 can transmit and receive information to and from other information devices, for example, via the communication satellite 9 (or wirelessly). The wired communication device 72 can send and receive information to and from other information devices connected to the wired communication line via the wired communication line. The storage device 73 stores the liquid feeding plan acquired from the liquid feeding plan creation device 8. The output device 74 can display and output the liquid feeding plan.

The supply side terminal 7 is connected to a liquid feeding pump 48 and a compressor 49 to control their operations. In addition, when the supply side terminal 7 is electrically connected to the receiving side terminal 6 via a wired communication device 72, the supply side terminal 7 operates the receiving side terminal 6 on equipment related to liquid feeding. Output the command.

[Configuration of liquid feeding plan creation device 8]
FIG. 3 is a functional block diagram of the liquid feeding plan creation device 8. The liquid transfer plan creation device 8 may be installed in either the liquefied gas supply ship 4 or a fuel base on the sea or land (not shown). Moreover, a plurality of functions of the liquid feeding plan creation device 8 may be installed in a distributed manner. The liquid feeding plan creation device 8 is constituted by a computer including a processor, memories such as ROM and RAM, and an I/O section (all not shown). The above processor may be a single processor that performs centralized control, or may be a plurality of processors that perform distributed control.

The processor of the liquid feeding plan creation device 8 is connected to a communication device 82, a storage device 83, and an output device 84 via an I/O section. The liquid feeding plan creation device 8 can store information in the storage device 83, and can read and use the stored information. The communication device 82 is configured to transmit and receive information via the communication satellite 9 (or wirelessly). Further, when the liquid feeding plan creation device 8 is provided on the ground, the communication device 82 may be configured to perform communication via the communication infrastructure on the ground. The liquid transfer plan creation device 8 sends and receives information to and from the receiving terminal 6 mounted on the liquefied gas fuel ship 3 and the supplying terminal 7 mounted on the liquefied gas supply ship 4 via the communication device 82. Can be done.

The memory and storage device 83 store programs such as basic programs and application programs executed by the processor, and data. The program is configured to cause the processor to perform processing of each functional unit, which will be described later. When the processor reads and executes the program, the liquid feeding plan creation device 8 performs processing as each functional unit described later.

The liquid feeding plan creation device 8 includes an information acquisition section 803, a methane value estimation section 804, a situation prediction section 810 (precooling prediction section 805, liquid feeding prediction section 806), a precooling consideration section 807, and a liquid feeding plan creation section. 808 and each functional unit. Hereinafter, with reference to FIGS. 3 and 4, the functions of each functional unit of the liquid feeding plan creation device 8 will be explained along the flow of the liquid feeding plan creation method. Note that FIG. 4 is a flowchart of the liquid feeding plan creation process.

The information acquisition unit 803 acquires information necessary for the processing performed by the liquid feeding plan creation device 8 (step S1), and temporarily stores the acquired information in a memory or the like. The information acquired by the information acquisition unit 803 includes receiving side information and supplying side information. The information acquisition unit 803 acquires the accepting side information from the accepting side terminal 6 via the communication device 82, but may also acquire the accepting side information from another information terminal or storage medium (not shown).

The supply side information is either stored in advance in the liquid feeding plan creation device 8 or is transmitted from the supply side terminal 7 to the liquid feeding plan creation device 8 . The supply side information may include supply side status information regarding the status of the liquefied gas fed from the supply tank 40 and liquefied gas supplier information. The supply side status information includes the composition, temperature, and pressure of the liquefied gas fed to the receiving tank 30. Note that the composition of the liquefied gas contained in the supply tank 40 is usually analyzed before shipping. Further, the temperature and pressure of the liquefied gas contained in the supply tank 40 are controlled to a predetermined value before shipping.

The situation prediction unit 810 predicts the situation of at least part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information. Specifically, the situation prediction unit 810 obtains a predicted value of information representing the situation (for example, the amount of operation or the amount of process). Information representing the status of the liquid feeding process includes: liquefied gas feeding amount, liquid feeding time, tank pressure, liquid temperature (or liquid temperature change), liquid composition change (for example, methane value change), and boil-off gas generation amount. , and labor force are exemplified. In place of the liquefied gas feeding amount and liquid feeding time described above, the operating amounts of the liquid feeding valve 351 and the liquid feeding pump 48 may be used. Examples of information representing the status of the preparation process (ie, precooling) include liquefied gas consumption, precooling time, and labor force. In place of the liquefied gas consumption amount and precooling time described above, the operation amount of the liquid feeding valve 351 or the liquid feeding pump 48 may be used. The above labor force is the total labor force required for the liquid feeding process or its preparation process when the labor force per unit time of one person is expressed using a predetermined index.

The situation prediction unit 810 according to the present embodiment predicts the situation by simulating at least a part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information, and uses information representing the situation. Find the predicted value. The situation prediction unit 810 according to this embodiment includes a precooling prediction unit 805 and a liquid feeding prediction unit 806. However, the situation prediction unit 810 may include at least one of the precooling prediction unit 805 and the liquid feeding prediction unit 806.

The precooling prediction unit 805 generates information representing the precooling status of the receiving tank 30 and the liquid sending line 35 based on the tank performance information and tank status information included in the receiving side information and the temperature of the liquefied gas included in the supplying side information. A predicted value is obtained (step S2).

In this embodiment, the precooling prediction unit 805 uses a precooling simulation model of the receiving tank 30 and the liquid sending line 35. The precooling simulation model is a numerical analysis model executed by a computer, and is stored in advance in the liquid feeding plan creation device 8. The precooling prediction unit 805 uses the tank cooling device 39 installed in the receiving tank 30 to cool the tank internal temperature to a predetermined target temperature from the time when the receiving side information is created by the precooling simulation of the receiving tank 30. Predict liquefied gas consumption, time required, and labor required for Further, the pre-cooling prediction unit 805 performs a pre-cooling simulation of the liquid sending line 35 and uses the pipe cooling device 38 installed in the liquid sending line 35 (or the liquid sending line 45) to cool the liquid sending line 35 based on the receiving side information. The amount of liquefied gas consumed, the time required, and the labor required to cool down the temperature of 35, 45 (ie, pipe temperature) to a predetermined target temperature are predicted. The above-mentioned predetermined target temperature may be, for example, the temperature of the liquefied gas to be sent. Moreover, although the precooling of the receiving tank 30 and the liquid sending line 35 is simulated separately in the above, the simulation model may simulate the precooling of the receiving tank 30 and the liquid sending line 35 all at once. Further, the precooling prediction unit 805 may be configured to predict at least one of liquefied gas consumption, required time, and labor force.

The liquid feeding prediction unit 806 calculates a predicted value of information representing the status of liquid feeding to the receiving tank 30 based on the tank performance information and tank status information included in the receiving side information and the supply side information (step S3). .

In this embodiment, the liquid feeding prediction unit 806 uses a liquid feeding simulation model. The liquid feeding simulation model is a numerical analysis model executed by a computer, and is stored in advance in the liquid feeding plan creation device 8. The liquid feeding prediction unit 806 calculates the liquid feeding amount, liquid feeding time, tank pressure, liquid temperature, liquid composition change, and boil-off gas generation amount when the receiving tank 30 and liquid feeding line 35 are not pre-cooled by liquid feeding simulation. Predict. Further, the liquid feeding prediction unit 806 predicts the liquid feeding amount, the liquid feeding time, and the amount of boil-off gas generated when the receiving tank 30 and the liquid feeding line 35 are precooled. However, the liquid feeding prediction unit 806 may be configured to predict at least one of the liquid feeding amount, liquid feeding time, tank pressure, liquid temperature, liquid composition change, and boil-off gas generation amount.

The methane value estimating unit 804 calculates the methane value of the liquefied gas in the receiving tank 30 after completion of sending the liquefied gas to the receiving tank 30 based on the receiving side information and the supplying side information acquired by the information acquiring unit 803. Estimate (step S4). Here, the methane value estimating unit 804 may estimate the methane value of the liquefied gas in the receiving tank 30 and the supply tank 40 after completion of sending the liquefied gas to the receiving tank 30.

The methane value of the remaining liquid in the receiving tank 30 can be estimated based on the liquid feeding history information and the pressure history of the receiving tank 30 included in the receiving side information. Furthermore, based on the tank status information included in the receiving side information, the amount of liquefied gas to be sent to the receiving tank 30, that is, the amount of liquefied gas to be added to the receiving tank 30 can be estimated. The methane number estimating unit 804 calculates the estimated methane number of the liquefied gas stored in the receiving tank 30 after completion of liquid transfer using a pre-stored calculation formula or model, and stores this in the memory. . In addition, based on the estimated value of the methane value of the liquefied gas in the receiving tank 30, the amount of liquefied gas to be added to the receiving tank 30, and the supply side information, the supply after the completion of sending the liquefied gas to the receiving tank 30 is determined. The methane number of the liquefied gas in the tank 40 can be estimated. The methane number estimating unit 804 may calculate the estimated value of the methane number of the liquefied gas stored in the supply tank 40 after completion of liquid feeding, using a pre-stored calculation formula or model. Note that in the above, the methane number is widely used as an index of the knocking resistance of gas fuel, with pure methane being 100 and hydrogen being 0. When the composition of the fuel gas changes, its properties such as its calorific value and methane number change, which can cause abnormal combustion such as engine knocking and misfires.

The precooling consideration unit 807 uses the predicted values obtained by the precooling prediction unit 805 and the liquid feeding prediction unit 806 to determine whether precooling of the receiving tank 30 and the liquid feeding line 35 is necessary (step S5). The pre-cooling consideration unit 807 may consider separately whether or not the receiving tank 30 needs to be pre-cooled and whether or not the liquid sending line 35 needs to be pre-cooled.

The pre-cooling examination unit 807 examines whether or not pre-cooling is necessary, for example, using a pre-stored evaluation function. The evaluation function in this case includes a term to evaluate the labor required for a series of operations including liquid feeding and its preparation (precooling), a term to evaluate the required time, and a term to evaluate the amount of liquefied gas fed (including consumption). It may include at least one of the items to be evaluated. In other words, the cost of a series of tasks can be evaluated using the evaluation function. For example, if the cost of a series of operations exceeds the cost of liquefied gas consumed due to the generation of boil-off gas, it is determined that precooling is not necessary. For example, if the amount of boil-off gas generated greatly exceeds the processing capacity of the liquefied gas fueled ship 3, it is determined that precooling is necessary regardless of the cost associated with precooling. However, the method of determining whether or not precooling is necessary by the precooling consideration section 807 is not limited to the above.

Note that the temperature at which liquefied gas becomes stable (saturation temperature) differs depending on its composition, so even if the residual liquid of liquefied gas in the receiving tank 30 is stable at the current temperature and pressure, the residual liquid and composition in the receiving tank 30 may differ. As soon as different liquefied gases are piled up, the liquefied gas may boil violently. Therefore, in addition to the predicted values obtained by the precooling prediction unit 805 and the liquid feeding prediction unit 806, the precooling consideration unit 807 calculates the difference between the composition of the liquefied gas remaining in the receiving tank 30 and the composition of the liquefied gas to be supplied. The necessity of precooling may be determined by taking this into consideration.

The liquid feeding plan creation unit 808 uses the methane number estimation result of the methane number estimation unit 804, the predicted value obtained by the precooling prediction unit 805, the predicted value obtained by the liquid feeding prediction unit 806, and the necessity of precooling by the precooling consideration unit 807. A liquid feeding plan is generated using the study results (step S6). The liquid feeding plan includes, for example, whether or not pre-cooling of the receiving tank 30 and the liquid feeding line 35 is necessary, the liquid feeding schedule (the amount of liquid fed, the liquid feeding time, etc.), and the estimated value of the methane value after the liquid feeding is completed. If precooling is necessary, the liquid feeding plan further includes a precooling schedule (precooling target temperature, precooling time, etc.). However, the contents of the liquid feeding plan are not limited to the above.

The liquid feeding plan creation device 8 outputs the generated liquid feeding plan. For example, the liquid feeding plan creation device 8 transmits the liquid feeding plan to the receiving terminal 6 and the supplying terminal 7. The receiving terminal 6 and the supplying terminal 7 can generate a precooling schedule and a liquid feeding schedule based on the acquired liquid feeding plan. In this way, it is possible to create an appropriate precooling schedule and liquid feeding schedule regardless of the skill of the liquefied gas supplier or the workers.

[Liquid feeding procedure]
The procedure for sending liquid from the supply tank 40 to the receiving tank 30 includes, for example, the following steps (1) to (10).
(1) In this embodiment, a Ship to Ship method is adopted, and first, the liquefied gas supply ship 4 is brought alongside the liquefied gas fuel ship 3, and these are moored.
(2) The loading arm (or flexible hose) connects the liquid sending line 35 of the receiving tank 30 and the liquid sending line 45 of the supply tank 40, and the return gas line 36 of the receiving tank 30 and the return gas of the supply tank 40 A line 46 is connected thereto.
(3) The receiving terminal 6 and the supplying terminal 7 are connected to be communicable by wire via the wired communication devices 62 and 72. However, the receiving terminal 6 and the supplying terminal 7 may be connected to be able to communicate wirelessly.
(4) Air purge of the liquid feeding lines 35 and 45 is performed to remove oxygen and water (humidity).
(5) Precooling (cooling down) of the liquid sending lines 35, 45 and the receiving tank 30 is performed as necessary. If the receiving side is notified of the liquid transfer plan in advance, the liquefied gas fuel ship 3 and the liquefied gas supply ship 4 are brought alongside according to the pre-cooling schedule so that the pre-cooling is completed according to the scheduled liquid transfer start time. Prior to this, the receiving tank 30 and the liquid sending line 35 may be cooled. This reduces the time the liquefied gas supply ship 4 is tied up, and contributes to efficient operation of the liquefied gas supply ship 4.
(6) Liquid is sent through the liquid sending lines 35 and 45 and gas is returned through the return gas line 36. The amount of liquefied gas fed is gradually raised to the full rate, and when the liquid feeding is finished, the amount of liquid fed is gradually lowered. The liquid feeding ends when the amount of liquid fed reaches the scheduled amount.
(7) The liquid feeding lines 35, 45 are drained, and the liquefied gas remaining in the liquid feeding lines 35, 45 is removed.
(8) The liquid supply lines 35 and 45 are purged with liquefied gas using nitrogen gas.
(9) The liquid sending lines 35, 45, the return gas lines 36, 46, and the wired communication are disconnected.
(10) The mooring between the liquefied gas fuel ship 3 and the liquefied gas supply ship 4 is released.

FIG. 5 is a diagram showing the configuration of a control system by the supply side terminal 7 during liquid feeding. FIG. 5 shows a state in which the receiving terminal 6 and the supplying terminal 7 are communicably connected by wire in step (3) above. The supply side terminal 7 acquires measurement information from various instruments (level gauge 31, thermometer 32, pressure gauge 33) regarding the reception tank 30 mounted on the liquefied gas fuel ship 3 through the reception side terminal 6 (or directly). can do. Further, the supply side terminal 7 can issue operation commands to devices related to liquid feeding to the reception tank 30 via the reception side terminal 6. Devices related to liquid feeding include a liquid feeding valve 351, a return valve 361, a tank cooling device 39, and a piping cooling device 38.

The supply side terminal 7 controls equipment related to liquid feeding to the receiving tank 30 according to the liquid feeding plan.

For example, in the precooling process (5), the supply side terminal 7 acquires the measured values of the liquid level, temperature, and pressure in the receiving tank 30, and measures the liquid level, temperature, and pressure in the receiving tank 30 according to the liquid feeding plan. Based on the value, an operation command (start command and end command) is issued to the tank cooling device 39. Upon receiving this command, the receiving terminal 6 operates the tank cooling device 39 in accordance with the command. Thereby, the receiving tank 30 is precooled in accordance with the precooling schedule included in the liquid feeding plan.

Further, for example, in the pre-cooling step (5), the supply side terminal 7 acquires the measured value of the pipe temperature of the liquid feeding line 35, and performs an operation on the pipe cooling device 38 based on the measured value of the pipe temperature according to the liquid feeding plan. Issue commands (start command and end command). Upon receiving this command, the receiving terminal 6 operates the pipe cooling device 38 in accordance with the command. Thereby, the liquid feeding line 35 is precooled in accordance with the precooling schedule included in the liquid feeding plan.

Further, for example, in the liquid feeding step (6), the supply side terminal 7 issues operation commands to devices related to liquid feeding according to the liquid feeding schedule included in the liquid feeding plan. FIG. 6 is a diagram showing the flow of processing at the supply side terminal 7 during liquid feeding. Hereinafter, with reference to FIGS. 5 and 6, the flow of processing at the supply side terminal 7 during liquid feeding in step (6) will be described.

The supply side terminal 7 acquires the liquid feeding plan (step S11). This step may be performed before coming alongside.

First, the supply side terminal 7 acquires measurement information from the liquid level gauge 31, thermometer 32, and pressure gauge 33, and monitors the status of the receiving tank 30 (step S12). When the receiving tank 30 and the return gas line 36 are pre-cooled, monitoring is started before the pre-cooling and continues until the end of a series of liquid feeding operations.

The supply side terminal 7 issues a command to open the return valve 361 (step S13). Upon receiving this command, the receiving terminal 6 operates to open the closed return valve 361.

Subsequently, the supply terminal 7 operates the compressor 49 (step S14). Thereby, the boil-off gas in the receiving tank 30 is returned to the supply side through the return gas lines 36 and 46.

The supply side terminal 7 issues a command to open the liquid feeding valve 351 (step S15). Upon receiving this command, the receiving terminal 6 operates to open the liquid sending valve 351, which is currently closed.

Subsequently, the supply side terminal 7 operates the liquid feeding pump 48 (step S16). Thereby, the liquefied gas in the supply tank 40 is sent to the receiving tank 30 through the liquid sending lines 35 and 45. During liquid feeding, the supply side terminal 7 (and/or the receiving side terminal 6) monitors the liquid level and pressure of the receiving tank 30 so that the liquid feeding amount and tank internal pressure are achieved in accordance with the liquid feeding schedule. The operations of the compressor 49 and liquid feed pump 48 are controlled accordingly.

When the liquid feeding amount reaches the planned liquid feeding amount (YES in step S17), the supply side terminal 7 stops the liquid feeding pump 48 (step S18) and issues a command to close the liquid feeding valve 351 (step S19). ), the liquid feeding ends.

The supply terminal 7 stops the compressor 49 (step S20), issues a command to close the return valve 361 (step S21), stops returning the boil-off gas, and ends the liquid sending step (6). The supply terminal 7 then ends monitoring the status of the receiving tank 30 (step S22). The monitoring may be completed, for example, in step (9) above.

As described above, the liquid feeding plan creation device 8 according to the present embodiment is capable of sending liquefied gas from the supply tank 40 to the receiving tank 30 through the liquid feeding line 35 connected to the receiving tank 30. A liquid feeding plan creation device 8 that generates a liquid plan,
Receiving side information including tank performance information regarding the performance of the receiving tank 30 and tank status information regarding the status of the liquefied gas contained in the receiving tank 30, and supply side status information regarding the status of the liquefied gas sent from the supply tank 40. an information acquisition unit 803 that acquires supply side information including;
a situation prediction unit 810 that calculates a predicted value of information representing the situation of at least a part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
A liquid feeding plan creation unit 808 that creates a liquid feeding plan based on the calculated predicted value is provided.

Similarly, the method for creating a liquid feeding plan according to this embodiment is as follows:
Receiving side information including tank performance information regarding the performance of the receiving tank 30 and tank status information regarding the status of the liquefied gas contained in the receiving tank 30, and supply side status information regarding the status of the liquefied gas sent from the supply tank 40. an information acquisition step of acquiring supply side information including;
a situation prediction step of obtaining a predicted value of information representing the situation of at least a part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
and a liquid feeding plan creation step of creating a liquid feeding plan based on the calculated predicted value.

In the liquid feeding plan creation device 8 and method configured as described above, a predicted value of information representing the situation of at least a part of the liquid feeding process and its preparation process is generated using the receiving side information and the supply side information, and this predicted value is generated. A liquid delivery plan is created based on the values. In this way, according to the liquid feeding plan creation device 8 and method configured as described above, it is possible to create a liquid feeding plan that does not rely on the skill of the liquefied gas supplier or the workers. For example, in bunkering, it is possible to create a liquid transfer plan not only for a liquefied gas fueled ship with a fixed contract but also for a liquefied gas fueled ship with a spot contract with the same accuracy. In addition, by predicting the status of at least part of the liquid transfer process and its preparation process, it is possible to omit inefficient operations and reduce waiting time, and the time required for liquid transfer and its preparation can be shortened. becomes. This makes it possible to streamline the operation of the supply side, which is smaller in number than the receiving side.

In this embodiment, the situation prediction unit 810 is configured to calculate a predicted value by simulating at least part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information. It has two simulation models.

By performing simulations that match the conditions of the receiving tank 30 in this way, suppliers and workers can easily predict and understand the conditions of the portions of the liquid transfer process and its preparation process where simulations have been performed. can.

In the present embodiment, the situation prediction unit 810 of the liquid feeding plan creation device 8 described above also calculates the amount of liquefied gas consumption, precooling time, and labor required for precooling at least one of the receiving tank 30 and the liquid feeding line 35. It includes a precooling prediction unit 805 that predicts at least one, and the liquid feeding plan includes information predicted by the precooling prediction unit 805.

Similarly, in the above-mentioned liquid feeding plan creation method, the situation prediction step predicts at least one of liquefied gas consumption, precooling time, and labor for precooling at least one of the receiving tank 30 and the liquid feeding line 35. The delivery plan includes the predicted information.

In this way, by predicting at least one of liquefied gas consumption, pre-cooling time, and labor for pre-cooling the receiving tank 30 and liquid-feeding line 35, which is the preparation process for liquid feeding, suppliers and workers can Appropriate precooling plans can be made without relying on skill. By predicting the liquefied gas consumption related to pre-cooling, it becomes easier to plan the use of boil-off gas of liquefied gas, and the boil-off gas can be effectively used as fuel. In addition, by predicting the pre-cooling time, it is possible to start pre-cooling without waiting for the arrival of the supply side, taking the pre-cooling time into account, and it is also possible to create an operation schedule taking the pre-cooling time into consideration. It becomes easier. Furthermore, by predicting the labor force, it can be used as a basis for considering whether or not pre-cooling is necessary, and it is possible to make relatively accurate cost estimates.

In the present embodiment, the situation prediction unit 810 of the liquid feeding plan creation device 8 described above also calculates the liquefied gas feeding amount, liquid feeding time, tank pressure, The liquid feeding prediction unit 806 includes a liquid feeding prediction unit 806 that predicts at least one of liquid temperature, liquid composition change, and boil-off gas generation amount, and the liquid feeding plan includes information predicted by the liquid feeding prediction unit 806.

Similarly, in the above liquid plan creation method, the situation prediction step includes changes in the liquefied gas feeding amount, liquid feeding time, tank pressure, liquid temperature, and liquid composition regarding the feeding of liquefied gas from the supply tank 40 to the receiving tank 30. , and the amount of boil-off gas generated, and the liquid feeding plan includes the predicted information.

In this way, by predicting at least one of the following: liquefied gas flow rate, liquid flow time, tank pressure, liquid temperature, liquid composition change, and boil-off gas generation amount, suppliers and workers can An appropriate liquid delivery plan can be created without relying on the skill of the operator. By predicting the amount of liquefied gas to be sent, the supply side can estimate an appropriate amount of liquid to be sent. Furthermore, by predicting the liquid feeding time, it becomes easy to create an operation schedule in consideration of the liquid feeding time. Furthermore, by predicting the amount of boil-off gas generated, it becomes easier to plan the use of boil-off gas, and the boil-off gas can be effectively used as fuel.

In the present embodiment, the liquid feeding plan creation device 8 further includes a precooling consideration unit 807 that determines whether precooling of at least one of the receiving tank 30 and the liquid feeding line 35 is necessary based on the calculated predicted value. In preparation, the liquid feeding plan includes whether or not precooling of at least one of the receiving tank 30 and the liquid feeding line 35 is necessary.

Similarly, the above-mentioned method for creating a liquid transfer plan further includes a step of determining whether precooling of at least one of the receiving tank 30 and the liquid transfer line 35 is necessary based on the calculated predicted value, and the liquid transfer plan is 30 and the liquid feeding line 35, including whether or not precooling of at least one of them is necessary.

By determining whether or not precooling is necessary based on the predicted value obtained in this way, an appropriate liquid feeding plan can be established without depending on the skill of the supplier or the worker. Moreover, it becomes possible to omit pre-cooling, which is less necessary, and economical and efficient liquid feeding becomes possible.

In the present embodiment, the above-mentioned liquid feeding plan creation device 8 also includes a methane value that estimates the methane value of the liquefied gas contained in the receiving tank 30 after completion of liquid feeding based on the receiving side information and the supplying side information. It further includes an estimation unit 804, and the liquid feeding plan includes the estimation result of the methane value.

Similarly, the method for creating a liquid transfer plan further includes a methane value estimation step of estimating the methane value of the liquefied gas contained in the receiving tank 30 after completion of liquid transfer based on the receiving side information and the supply side information. , the liquid delivery plan includes the estimation result of the methane number.

In this way, by including the estimated value of the methane value of the liquefied gas in the receiving tank 30 after completion of liquid feeding in the liquid feeding plan, it is possible to determine whether the receiving tank 30 is a fuel storage tank mounted on the liquefied gas fuel ship 3. In this case, it becomes possible to set up an engine operation plan in advance according to the methane number.

In addition, the liquefied gas feeding support system 100 according to the present embodiment includes a liquid feeding plan creation device 8, a liquid feeding pump 48 that sends liquefied gas from the supply tank 40 to the liquid feeding lines 35, 45, and a receiving tank 30. The measured values of pressure and liquid level as well as the liquid feeding plan created by the liquid feeding plan creation device 8 are acquired, and the liquid feeding pump 48 is operated according to the liquid feeding plan based on the measured values of the pressure gauge 33 and the liquid level gauge 31. and a supply side terminal 7 configured to do so.

In this way, by automatically performing the liquid feeding operation based on the liquid feeding plan, it is possible to reduce the labor of the workers on the supply side and the receiving side. Furthermore, variations in liquid feeding operations due to the skill of workers can be reduced.

In this embodiment, the receiving tank 30 is equipped with a tank cooling device 39 that cools the inside of the receiving tank 30, and the supply side terminal 7 of the liquid feeding support system 100 is configured to control the pressure, liquid level, and It is configured to obtain temperature measurements and issue operation commands to the tank cooling device 39 based on the pressure, liquid level, and temperature measurements so as to cool the receiving tank 30 according to the liquid feeding plan. .

In this way, the operation of cooling the receiving tank 30 is automatically performed based on the liquid feeding plan, so that the labor of the workers on the supply side and the receiving side can be reduced. Further, it is possible to reduce variations in the precooling operation depending on the skill of the workers.

In this embodiment, the receiving tank 30 is equipped with a piping cooling device 38 that cools part or all of the piping of the liquid feeding line 35, and the supply side terminal 7 of the liquid feeding support system 100 is connected to the liquid feeding line 35. 35 is acquired, and an operation command is issued to the piping cooling device 38 based on the piping temperature to cool the piping of the liquid feeding line 35 according to the liquid feeding plan.

In this way, the operation of cooling the liquid feeding line 35 is automatically performed based on the liquid feeding plan, thereby reducing the labor of the workers on the supply side and the receiving side. Further, it is possible to reduce variations in the precooling operation depending on the skill of the workers.

[Modified example]
In the above embodiment, the situation prediction unit 810 of the liquid feeding plan creation device 8 simulates precooling and liquid feeding using a simulation model, but a machine learning model may be used as a proxy model for the simulation. In this case, the accuracy of prediction can be improved by training the machine learning model using actual precooling operation results and liquid feeding operation results. Below, a modified example of the liquid feeding plan creation device 8 will be described, which includes a situation prediction unit 810 configured to use a machine learning model to obtain predicted values of information representing the status of the liquid feeding process and its preparation process. .

FIG. 7 is a functional block diagram of a liquid feeding plan creation device 8A according to a modification, and FIG. 8 is a diagram showing a learning device 50 and its peripheral configuration. The liquid feeding plan creating device 8A shown in FIG. 7 includes a learning device 50 and a learning storage device 60 in addition to the components of the liquid feeding plan creating device 8 according to the above-described embodiment. However, the learning device 50 and the storage device 60 may be configured as devices independent from the liquid feeding plan creating device 8A, and may be communicably connected to the liquid feeding plan creating device 8A.

As shown in FIG. 8, the learning device 50 includes a learning data acquisition section 51, a preprocessing section 52, and a learning section 53. The storage device 60 is constructed with a learning data DB that stores learning data (raw data), a teacher data DB that stores teacher data, and a parameter DB. The learning data is created based on actual precooling operation results and liquid feeding operation results. The learning data is not limited to the target liquefied gas supply ship 4, and may include actual operation results of other liquefied gas supply ships.

The learning data acquisition unit 51 acquires data used in machine learning, such as learning data. The preprocessing unit 52 preprocesses the learning data to create teacher data. The preprocessing includes at least one of various processes such as data format conversion, abnormality confirmation, data extraction, and variable name and file name change.

The learning unit 53 learns the correlation between input data and output data by machine learning. In this embodiment, the input data is receiving side information and supplying side information, and the output data is a predicted value of information representing the status of at least a part of the liquid feeding process and its preparation process. The learning unit 53 executes supervised learning as an example of a machine learning learning algorithm. Generally, in supervised learning, a large amount of known dataset (referred to as supervised data) of input data and corresponding output data is given in advance, and the supervised learning suggests the correlation between the input data and output data. This is a method of learning a correlation model for estimating required output data for new input data by identifying features. Although the correlation between input data and output data is substantially unknown at the start of the learning algorithm, the learning unit 53 gradually identifies features and interprets the correlation as learning progresses. Once the correlation between input data and output data has been interpreted to a certain level of reliability, the learning results repeatedly output by the learning unit 53 indicate what the output data should be in relation to the input data. It can be used to make estimates. In other words, the learning unit 53 can gradually bring the correlation between input data and output data closer to the optimal solution as the learning algorithm progresses.

In this embodiment, the learning unit 53 inputs teacher data into a neural network and learns the relationship between input data and output data. Various parameters set for the neural network are stored in a parameter DB. For example, the parameter DB stores the learned synaptic weights of the neural network. The neural network in which each parameter to be stored is set becomes a trained model.

The situation prediction unit 810 of the liquid feeding plan creation device 8 according to the modified example has at least one trained model created as described above. The trained model is configured to derive a predicted value of information representing the situation of at least part of the liquid feeding process and its preparation process from the receiving side information and the supplying side information. The situation prediction unit 810 may have a learned model for each piece of information representing the situation. Alternatively, the situation prediction unit 810 may have a learned model for each combination of information representing the situation.

The situation prediction unit 810 includes a precooling prediction unit 805 and a liquid feeding prediction unit 806. The precooling prediction unit 805 calculates the temperature of the piping installed in the liquid feeding line 35 (or liquid feeding line 45) based on the tank performance information and tank status information included in the receiving side information and the temperature of the liquefied gas included in the supplying side information. A predicted value of at least one of the liquefied gas consumption amount, required time, and labor required to cool the temperature of the liquid sending lines 35 and 45 (i.e., piping temperature) to a predetermined target temperature using the cooling device 38 It has a trained model that derives .

The liquid feeding prediction unit 806 calculates the liquid feeding amount when the receiving tank 30 and the liquid feeding line 35 are not precooled and/or when the liquid feeding line 35 is precooled, based on the tank performance information and tank status information included in the receiving side information and the supply side information. , a trained model that derives a predicted value of at least one of liquid feeding time, tank pressure, liquid temperature, liquid composition change, and boil-off gas generation amount.

The precooling prediction unit 805 and the liquid feeding prediction unit 806 input the receiving side information and the supplying side information as input data to the learned model, and obtain predicted values of information representing the situation as output data. The obtained predicted value is used to create a liquid feeding plan similarly to the above-described embodiment.

Although preferred embodiments (and modified examples) of the present invention have been described above, the specific structure and/or functional details of the above embodiments may be changed without departing from the spirit of the present invention. may be included in the present invention. The above configuration can be modified as follows, for example.

In the above embodiment, the receiving tank 30 is a fuel storage tank of the liquefied gas fueled ship 3, but the receiving tank 30 to which the present invention is applied is not limited to the receiving tank 30 mounted on the liquefied gas fueled ship 3. The receiving tank 30 may be, for example, a liquefied gas storage tank installed on land or on the sea. Further, in this embodiment, the supply tank 40 and the supply side terminal 7 are mounted on a bunker ship (liquefied gas supply ship 4), but the application of the present invention is not limited thereto. The supply tank 40 may be, for example, a floating bunkering facility such as a bunkering barge or a bunkering pontoon, or a liquefied gas storage tank installed on land or at sea.

Further, in the above embodiment, the supply side terminal 7 is responsible for liquid feeding and precooling operations, but the supply side terminal 7 is responsible for at least one of the liquid feeding and precooling operations, and the other operations are performed by the worker. Good too.

3 : Liquefied gas fuel ship 4 : Liquefied gas supply ship 6 : Receiving side terminal 7 : Supply side terminal 8, 8A: Liquid transfer plan creation device 30 : Receiving tank 31 : Level gauge 32 : Thermometer 33 : Pressure gauge 34 : Piping thermometer 35 : Liquid feeding line 36 : Return gas line 38 : Piping cooling device 39 : Tank cooling device 40 : Supply tank 45 : Liquid feeding line 46 : Return gas line 48 : Liquid feeding pump 49 : Compressor 50 : Learning device 51: Learning data acquisition unit 52: Preprocessing unit 53: Learning unit 60: Storage device 100: Liquid feeding support system 351: Liquid feeding valve 361: Return valve 803: Information acquisition unit 804: Methane value estimation unit 805: Pre-cooling prediction Section 806: Liquid feeding prediction section 807: Pre-cooling consideration section 808: Liquid feeding plan creation section 810: Situation prediction section

Claims (16)

A liquid feeding plan creation device that generates a liquid feeding plan for feeding liquefied gas from a supply tank to a receiving tank through a liquid feeding line connected to the receiving tank,
Receiving side information including tank performance information regarding the performance of the receiving tank and tank status information regarding the status of the liquefied gas contained in the receiving tank, and supply side status regarding the status of the liquefied gas fed from the supply tank. an information acquisition unit that acquires supply side information including information;
a situation prediction unit that calculates a predicted value of information representing a situation in at least part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
a liquid feeding plan creation unit that creates the liquid feeding plan based on the calculated predicted value ,
The situation prediction unit is configured to calculate the predicted value by simulating at least part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information. Having a simulation model ,
Liquid feeding plan creation device. A liquid feeding plan creation device that generates a liquid feeding plan for feeding liquefied gas from a supply tank to a receiving tank through a liquid feeding line connected to the receiving tank,
Receiving side information including tank performance information regarding the performance of the receiving tank and tank status information regarding the status of the liquefied gas contained in the receiving tank, and supply side status regarding the status of the liquefied gas fed from the supply tank. an information acquisition unit that acquires supply side information including information;
a situation prediction unit that calculates a predicted value of information representing a situation in at least part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
a liquid feeding plan creation unit that creates the liquid feeding plan based on the calculated predicted value,
The situation prediction unit includes at least one trained model configured to derive the predicted value from the receiving side information and the supplying side information.
Liquid feeding plan creation device. A liquid feeding plan creation device that generates a liquid feeding plan for feeding liquefied gas from a supply tank to a receiving tank through a liquid feeding line connected to the receiving tank,
Receiving side information including tank performance information regarding the performance of the receiving tank and tank status information regarding the status of the liquefied gas contained in the receiving tank, and supply side status regarding the status of the liquefied gas fed from the supply tank. an information acquisition unit that acquires supply side information including information;
a situation prediction unit that calculates a predicted value of information representing a situation in at least part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
a liquid feeding plan creation unit that creates the liquid feeding plan based on the calculated predicted value,
The situation prediction unit includes a precooling prediction unit that predicts at least one of liquefied gas consumption, precooling time, and labor regarding precooling of at least one of the receiving tank and the liquid sending line,
The liquid feeding plan includes information predicted by the precooling prediction unit,
Liquid feeding plan creation device. The situation prediction unit includes at least one of a liquefied gas feeding amount, a liquid feeding time, a tank pressure, a liquid temperature, a liquid composition change, and a boil-off gas generation amount regarding the feeding of the liquefied gas from the supply tank to the receiving tank. including a liquid feeding prediction unit that predicts one,
The liquid feeding plan includes information predicted by the liquid feeding prediction unit.
The liquid feeding plan creation device according to any one of claims 1 to 3 . further comprising a precooling consideration unit that determines whether or not precooling of at least one of the receiving tank and the liquid sending line is necessary based on the predicted value,
The liquid feeding plan includes whether or not pre-cooling of at least one of the receiving tank and the liquid feeding line is necessary.
The liquid feeding plan creation device according to any one of claims 1 to 4 . further comprising a methane number estimating unit that estimates a methane number of the liquefied gas accommodated in the receiving tank after completion of liquid feeding, based on the receiving side information and the supplying side information,
The liquid feeding plan includes the estimation result of the methane number,
The liquid feeding plan creation device according to any one of claims 1 to 5 . A liquid feeding plan creation device according to any one of claims 1 to 6 ,
a liquid feeding pump that sends the liquefied gas from the supply tank to the liquid feeding line;
The measured values of the pressure and liquid level of the receiving tank and the liquid feeding plan created by the liquid feeding plan creation device are acquired, and the liquid feeding is performed based on the measured values of the pressure and the liquid level according to the liquid feeding plan. a supply terminal configured to operate a liquid pump;
Liquefied gas feeding support system. The receiving tank is equipped with a tank cooling device that cools the inside of the receiving tank,
The supply side terminal acquires the measured values of the pressure, the liquid level, and the temperature of the receiving tank, and adjusts the pressure, the liquid level, and the temperature so as to cool the receiving tank according to the liquid feeding plan. configured to issue an operation command to the tank cooling device based on the measured value;
The liquefied gas liquid feeding support system according to claim 7 . The receiving tank is equipped with a piping cooling device that cools part or all of the piping of the liquid sending line,
The supply side terminal acquires the piping temperature of the liquid feeding line, and issues an operation command to the piping cooling device based on the piping temperature to cool the piping of the liquid feeding line according to the liquid feeding plan. It is configured as follows.
The liquefied gas liquid feeding support system according to claim 7 or 8 . The receiving tank is a fuel storage tank of a liquefied gas fueled ship, and the supply tank and the supply side terminal are mounted on a bunker ship.
The liquefied gas feeding support system according to any one of claims 7 to 9 . A method for creating a liquid transfer plan in which a computer generates a liquid transfer plan for transferring liquefied gas from a supply tank to a receiving tank through a liquid transfer line connected to the receiving tank, the method comprising:
Receiving side information including tank performance information regarding the performance of the receiving tank and tank status information regarding the status of the liquefied gas contained in the receiving tank, and supply side status regarding the status of the liquefied gas fed from the supply tank. an information acquisition step of acquiring supply side information including the information;
a situation prediction step of obtaining a predicted value of information representing the situation of at least a part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
a liquid feeding plan creation step of creating the liquid feeding plan based on the calculated predicted value ,
The situation prediction step includes calculating the predicted value by simulating at least part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information.
How to create a liquid transfer plan. A method for creating a liquid transfer plan in which a computer generates a liquid transfer plan for transferring liquefied gas from a supply tank to a receiving tank through a liquid transfer line connected to the receiving tank, the method comprising:
Receiving side information including tank performance information regarding the performance of the receiving tank and tank status information regarding the status of the liquefied gas contained in the receiving tank, and supply side status regarding the status of the liquefied gas fed from the supply tank. an information acquisition step of acquiring supply side information including the information;
a situation prediction step of obtaining a predicted value of information representing the situation of at least a part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
a liquid feeding plan creation step of creating the liquid feeding plan based on the calculated predicted value,
The situation prediction step includes deriving the predicted value from the receiving side information and the supplying side information using at least one trained model.
How to create a liquid transfer plan. A method for creating a liquid transfer plan in which a computer generates a liquid transfer plan for transferring liquefied gas from a supply tank to a receiving tank through a liquid transfer line connected to the receiving tank, the method comprising:
Receiving side information including tank performance information regarding the performance of the receiving tank and tank status information regarding the status of the liquefied gas contained in the receiving tank, and supply side status regarding the status of the liquefied gas fed from the supply tank. an information acquisition step of acquiring supply side information including the information;
a situation prediction step of obtaining a predicted value of information representing the situation of at least a part of the liquid feeding process and its preparation process based on the receiving side information and the supplying side information;
a liquid feeding plan creation step of creating the liquid feeding plan based on the calculated predicted value,
The situation predicting step includes predicting at least one of liquefied gas consumption, precooling time, and labor regarding precooling of at least one of the receiving tank and the liquid sending line.
How to create a liquid transfer plan. The situation prediction step includes at least one of the following: liquefied gas feeding amount, liquid feeding time, tank pressure, liquid temperature, liquid composition change, and boil-off gas generation amount regarding the feeding of the liquefied gas from the supply tank to the receiving tank. including predicting one;
The method for creating a liquid feeding plan according to any one of claims 11 to 13 . further comprising the step of determining whether precooling of at least one of the receiving tank and the liquid sending line is necessary based on the calculated predicted value,
The liquid feeding plan includes whether or not pre-cooling of at least one of the receiving tank and the liquid feeding line is necessary.
The method for creating a liquid feeding plan according to any one of claims 11 to 14 . further comprising a methane number estimation step of estimating a methane number of the liquefied gas accommodated in the receiving tank after completion of liquid feeding, based on the receiving side information and the supplying side information,
The liquid feeding plan includes the estimation result of the methane number,
The method for creating a liquid feeding plan according to any one of claims 11 to 15 .

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