KR20220053827A - Battery operating system for Floating Storage Regasification unit - Google Patents

Abstract

Provided is a battery operation system for liquefied gas storage and regasification ships. According to the present invention, the battery operation system for liquefied gas storage and regasification ships comprises: a cargo tank for storing liquefied gas; a regasification device connected to a power grid and regasifying the liquefied gas; a generator connected to the power grid and supplying power to the demand; and a battery which is connected to the power grid and supplies power to the demand. The battery may be charged with electric power supplied from the generator when the regasification device is not in operation, and may supply the charged power to the regasification device when the regasification device is in operation.

Description

Liquefied gas storage and regasification vessel battery operating system {Battery operating system for Floating Storage Regasification unit}

The present invention relates to a battery operating system of a liquefied gas storage and regasification vessel.

The liquefied gas storage and regasification device of the regasification line is operated with power supplied from the generator. And, a battery is mounted on the liquefied gas storage and regasification line and is used as auxiliary power of such a generator.

Korean Patent Publication No. 10-2015-0086029

The problem to be solved by the present invention is to provide a battery operating system for a liquefied gas storage and regasification vessel capable of efficient liquefied gas storage and energy management of the regasification vessel by complexly connecting the regasification device and the battery system of the vessel.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The battery operating system of the liquefied gas storage and regasification line according to an aspect of the present invention for achieving the above object, a cargo tank for storing liquefied gas; a regasification device connected to the power grid and configured to regasify the liquefied gas; a generator connected to the power grid and for supplying power to demand; and a battery connected to the power grid for supplying power to a consumer, wherein the battery is charged with power supplied from the generator when the regasification device is not in operation, and the charged battery is charged when the regasification device is operated Power may be supplied to the regasification device.

The regasification device, a first part for changing the physical properties of the liquefied gas to gas, a second part for maintaining the supply amount of the liquefied gas, and a third part for utilizing the boil-off gas generated in the cargo tank Including, the battery may selectively supply power to the first to third parts according to priority.

The priority may be in the order of the first part, the second part, and the third part.

The first part includes a seawater pump for supplying seawater to the demand side, and a glycol water pump for supplying glycol water that is a heating medium for heat exchange to the demand side, and the second part includes a cargo pump and a high-pressure pump and the third part may include at least one compressor.

Further comprising a monitoring unit for monitoring the amount of power of at least one of the generator and the compressor, the compressor includes a plurality of compressors, and a first operating state in which only one first compressor of the plurality of compressors is operated; The plurality of compressors is operated in a second operating state in which two or more compressors are operated, and the monitoring unit monitors an operating state including the first operating state and the second operating state of the compressor, and the battery is Power may be supplied to the compressor under a preset condition based on the operating state of the compressor.

The battery supplies power corresponding to a load amount to one of the compressors in the second operating state to share the load of the generator, and the compressor is configured to include the first A compressor replaces the power supplied by the generator and is supplied with power by the battery. In the second operating state, some compressors of the two or more compressors receive power only from the battery, and some compressors receive power only from the generator. can be supplied.

According to the regasification apparatus and the battery operating method based thereon of the present invention as described above, there are one or more of the following effects.

According to the present invention, it is possible to enable organic and efficient energy management of a ship by complexly operating a regasification device and a battery system of a ship that have been operated separately and independently.

1 is a block diagram showing the configurations of a battery operating system of a liquefied gas storage and regasification line according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating some of the configurations of the regasification apparatus according to FIG. 1 .
FIG. 3 is a configuration diagram illustrating an overall configuration of the regasification apparatus according to FIG. 1 .
4 is a flowchart sequentially illustrating a method of operating a battery operating system of a liquefied gas storage and regasification line according to an embodiment of the present invention.
5 is a flowchart sequentially illustrating a method of operating a battery operating system of a liquefied gas storage and regasification line according to FIG. 4 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments published below, but may be implemented in various different forms, and only these embodiments allow the publication of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numbers regardless of reference numerals, A description will be omitted.

1 is a block diagram illustrating a battery system based on fuel supply and re-liquefaction of a liquefied gas carrier according to an embodiment of the present invention. Referring to FIG. 1 , the battery operating system 1000 may include a battery 10 , a generator 20 , a regasification device 100 , a control unit 210 , and a monitoring unit 220 .

FIG. 2 is a block diagram illustrating some of the configurations of the regasification apparatus according to FIG. 1 .

Referring to FIG. 2 , the regasification apparatus may include a first part PT1 , a second part PT2 , and a third part PT3 . The first part PT1 may include a seawater pump 140 and a glycol water pump 150 . The second part may include a cargo pump 115 and a high-pressure pump 170 . The third part PT3 may include the compressor 130 .

FIG. 3 is a configuration diagram illustrating an overall configuration of the regasification apparatus according to FIG. 1 .

Referring to FIG. 3 , the regasification device 100 includes a cargo hold 110 , a cargo pump 115 , a glycol tank 120 , a compressor 130 , a seawater pump 140 , a glycol water pump 150 , and a condensing unit ( 160 ), a high-pressure pump 170 , and a heat exchanger 180 .

The battery 10 may supply power to the demanding party through the power grid. The generator 20 may perform power supply to the demanding party through the power grid. The regasification device 100 is for regasification of fuel.

Here, the battery 10 may be charged with power supplied from the generator 20 when the regasification device 100 is not in operation. The battery 10 may supply power for the operation of the regasification apparatus 100 when the charge rate reaches a preset dischargeable set value. Here, the dischargeable set value may include a state in which the battery 10 reaches, for example, a charge rate of about 80%.

The above-described regasification device 100 is operated only when sending gas to land and consumes power, but the battery 10 provides power according to the operation of the regasification device 100 with pre-charged power, The battery 10 is to be charged with the surplus power of the generator 20 according to the non-operation of the regasification device 100 .

Accordingly, it is possible to efficiently manage and operate electric power, and there is an effect of appropriately balancing the demand and supply of electric power.

The battery 10 is set to a first mode in which the charge rate is set within a range of a first lower limit value (eg, about 10%, etc.) to a first upper limit value (eg, about 90%, etc.) when the regasification device 100 is operated. , it is possible to supply power to the regasification device 100 .

The first part PT1 may serve to change fuel properties in the regasification device 100 . The second part PT2 may serve to maintain a supply amount of fuel. The third part PT3 may serve for operation of Boil Off Gas (BOG).

The battery 10 may supply power corresponding to the amount of power boost required by at least one of the first part PT1 , the second part PT2 , and the third part PT3 to the power grid.

Here, the first part PT1 may include a seawater pump 140 and a glycol water pump 150 , and the second part PT2 may include a cargo pump 115 and a high-pressure pump 170 . can In addition, the third part PT3 may include at least one compressor 130 .

The first part PT1 may include a seawater pump 140 and a glycol water pump 150 . The second part PT2 may include a cargo pump 115 and a high-pressure pump 170 . The third part PT3 may include at least one compressor 130 .

The control unit 210 is for the overall control of the battery operating system 1000 and may include an energy management unit for power grid control, an EMS (Energy Management System), and the like.

The monitoring unit 220 may monitor the amount of power of at least one of the generator 20 and the compressor 130 . For example, the monitoring unit 220 may monitor an operating state including the number of operating operations of the compressor 130 .

Accordingly, the battery 10 may supply power to the compressor 130 under a preset condition based on the operating state of the compressor 130 .

The compressor 130 may be operated in a first operating state operated with a single first compressor and a second operating state operated with a plurality of N compressors. The battery 10 has an effect of supplying power corresponding to the load amount on the compressor 130 to any one of the N compressors in the second operating state to share the load of the generator 20 .

In addition, one compressor 130 has an effect of enabling efficient recycling of boil-off gas through the compressor 130 by securing power that can be operated preferentially.

When the compressor 130 is in the first operating state, power may be supplied by any one of the battery 10 or the generator 20 , or may receive power in combination by the battery 10 and the generator 20 .

Here, the battery 10 may provide power with priority in the order of the first part PT1 , the second part PT2 , and the third part PT3 .

In addition, when the operation of the regasification device 100 is completed, the battery 10 has a second lower limit value (eg, about 20%, etc.) smaller than the aforementioned first lower limit value to a second upper limit value smaller than the first upper limit value (eg, about 80%, etc.) may be set to the second mode to supply power to a demanding destination.

The heat exchanger 180 may include a first heat exchanger 181 , a second heat exchanger 182 , and a third heat exchanger 183 . The cargo hold 110 is a place where liquefied gas is stored and may be provided in various ways in a horizontal direction, a vertical direction, and a complex arrangement between horizontal and vertical directions.

Here, the glycol tank 120 is a place where glycol water is stored, and it can supply glycol water to a demanding place. The compressor 130 compresses and delivers the vaporized gas discharged to the cargo hold 110 .

Here, the compressor 130 is to collect the boil-off gas of the naturally vaporized component in the cargo hold 110 as much as possible and deliver it thereafter. The seawater pump 140 is for supplying seawater to the demand side, and the glycol water pump 150 is for supplying the glycol water to the demand side by pressurizing glycol water, which is a heating medium for heat exchange.

The condensing unit 160 may receive and mix the vaporized gas compressed by the compressor 130 or the liquefied gas from the cargo hold 110 to condense the boil-off gas. The high-pressure pump 170 receives the liquefied gas supplied from the condensing unit 160 and compresses it to a high pressure, and serves to compress the liquefied gas under a suitable pressure condition for delivery from the initial cargo hold 110 to the final destination, the land.

The heat exchanger 180 may exchange heat with the gas supplied through the high-pressure pump 170 . The first heat exchanger 181 among these heat exchangers 180 may be made into liquefied gas through heat exchange with respect to the gas pressurized by the high-pressure pump 170 based on glycol water.

The second heat exchanger 182 heats the liquefied gas supplied from the first heat exchanger 181 to secondarily increase the temperature so that it can be sent to the land. The third heat exchanger 183 performs heat exchange with the glycol water using seawater water supplied through the seawater pump 140 as a heat source so that the heated glycol water is converted into the first exchanger 181 and the second heat exchanger 182. can be supplied with

Glycol water heated through the third heat exchanger 183 is supplied to the first heat exchanger 181 and the second heat exchanger 182, respectively, and heat exchange between the first heat exchanger 181 and the second heat exchanger 182 make it possible to perform.

In the first heat exchanger 181 to the third heat exchanger 183, glycol water may be circulated with repeated input and discharge. When the regasification device 100 is not operated, the generator 20 may charge the battery 10 .

And, when the regasification device 100 is operated, the battery 10 may discharge the generator 20 to assist the load of the generator 20. Through this, the battery 10 when performing regasification Power supply is made to the demand side including the generator 20 by the discharge of the power supply, and the surplus power present when the regasification is not in operation can be supplied from the generator to be charged.

Accordingly, an effect capable of efficient energy management in liquefied gas storage and fuel storage and transmission of the regasification vessel can be derived. That is, through the above contents, the present invention has the effect of providing a battery operating system for a storage and regasification line capable of efficient and organic energy management specialized for the regasification device through the interconnection between the regasification device, the generator and the battery. there is.

4 is a flowchart sequentially illustrating a battery operating method based on a regasification device according to an embodiment of the present invention.

Referring to FIG. 4 , the battery operating method (S100) based on the regasification device includes a device operation determination step (S110), a first operation step (S120), a second operation step (S130), and a third operation step (S140). may include

Whether to operate the regasification apparatus 100 may be determined by the control unit 210 in the device operation determination step S110 . Here, the operation of the regasification apparatus 100 may include operation determination by an operator or operation by a preset control unit.

In the first operation step (S120), when the operation of the regasification apparatus 100 is determined, the regasification apparatus 100 may be operated so that a change in physical properties between the liquefied gas and the gas on the regasification apparatus 100 is performed by the control unit. there is.

In the second operation step (S130), the supply amount, flow, and pressure for any one of the liquefied gas and the gas on the regasification apparatus 100 by the controller 210 is controlled as set conditions. can

In the third operation step ( S140 ), the control unit 210 may control the regasification device 100 to operate the boil-off gas of the cargo hold 110 . The regasification apparatus 100 is supplied with power by the battery 10 according to operation, and when the regasification is not in operation, surplus power by the generator 20 may be supplied.

5 is a flowchart sequentially illustrating a battery operating method based on a regasification device according to an embodiment of the present invention. A battery operating method ( S100 ) based on the above-described regasification apparatus 100 will be described in more detail with reference to FIG. 5 .

Referring to FIG. 5 , the first operation step S110 may include a seawater pump operation step S111 and a glycol water pump 150 operation step S112 . The first operation step (S120) is a seawater pump operation step (S121) for the operation of the seawater pump 140 for physical property change, and a glycol water pump operation step (S122) for the glycol water pump 150 operation for the physical property change (S122) may include

The second operation step (S130) is a cargo pump operation step (S131) in which the cargo pump 115 for controlling the fuel supply amount is operated, and a high-pressure pump operation step (S132) in which the high-pressure pump 170 for controlling the fuel supply amount is operated (S132) may include

The third operation step ( S140 ) relates to the use of the naturally vaporized boil-off gas for the efficient operation of the regasification apparatus 100 and the battery 10 as a whole. For example, it may be to control the operation of the compressor 130 for the boil-off gas.

On the regasification apparatus 100 , the seawater pump 140 and the glycol water pump 150 may be operated in order to change physical properties between the liquefied gas and the gas. When the cargo pump 115 and the high-pressure pump 170 are operated on the regasification device 100, the charging rate used in the battery 10 is changed from about 80% to about 90% in response to the operation of the pump, and the lowest charging rate The first charging mode may be set to be changed from about 20% to about 10%.

The battery 10 may be charged at a charging rate of about 90% through charging in the first charging mode. When the operation of the regasification device 100 is completed, the maximum allowable charging rate of the battery 10 is changed from about 90% to about 80%, and the second lowest charging rate is changed from about 10% to about 20% It can be set to charging mode. Here, the lowest charging rate may include a time when the operation of the battery 10 power is stopped.

In the compressor 130 , the power usage alone or together with the generator 20 is monitored by a predetermined monitoring unit 220 , and power for charging the battery 10 may be supplied from the generator 20 . The monitoring unit 220 may check the number of operations of the compressor 130 and control the compressor 130 for each preset condition.

Here, the monitoring unit 220 suffices to directly or indirectly monitor the monitored object and is not limited to any specific one. Here, when the compressor 130 is operated as a single first compressor 130 , the monitoring unit 220 sets the required power information according to the operation of the first compressor 130 to supply power from the generator 20 . This is to ensure that the necessary power for the For example, EMS is to set such necessary power in advance so that it can be secured.

When the compressor 130 is operated with a plurality of N compressors 130 , the monitoring unit 220 sets the required supply power information for the operation of the first compressor and sets the required supply power information for the operation of the first compressor to the generator ( 20) may be for securing the necessary power for the power supplied from the station in advance.

Here, the remaining compressors except for the first compressor among the compressors 130 may be supplied with power, for example, not by the battery 10 but by the generator 20 separately from the secured power for the first compressor.

The load on the battery 10 may have a large value in the order of the seawater pump 140 , the glycol water pump 150 , the cargo pump 115 , the high-pressure pump 170 , and the compressor 130 . Therefore, there is an effect that can achieve the purpose of changing the liquefied gas to gas by giving priority to the load amount and operating each element according to the assigned priority and maintaining the supply amount in this process.

In addition, there is an effect of efficiently recycling the boil-off gas (eg, natural gas boil-off gas, etc.) in the regasification process.

Although embodiments of the present invention have been described with reference to the above and the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can practice the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

S: fuel line
P1: first connector
P2: 2nd connector
P3: 3rd connector
P4: 4th connector
P5: 5th connector
P6: 6th connector
L: land transmission destination
PT1: 1st part
PT2: 2nd part
PT3: 3rd part
10: battery
20: generator
110: cargo hold
120: glycol tank
130: compressor
140: sea water pump
150: glycol water pump
160: condensing unit
170: high pressure pump
180: heat exchanger
181: first heat exchanger
182: second heat exchanger
183: Third heat exchanger?

Claims (6)

Cargo tank for storing liquefied gas;
a regasification device connected to the power grid and configured to regasify the liquefied gas;
a generator connected to the power grid and configured to supply power to a consumer; and
It is connected to the power grid and includes a battery for supplying power to a demanding party,
The battery is
A battery operating system of a liquefied gas storage and regasification line that is charged with power supplied from the generator when the regasification device is not in operation, and supplies the charged power to the regasification device when the regasification device is operated. The method of claim 1,
The regasification device is
a first part for changing the physical properties of the liquefied gas into a gas;
a second part for maintaining the supply amount of the liquefied gas;
Including a third part for utilizing the boil-off gas generated in the cargo tank,
The battery, according to the priority, selectively supplying power to the first to third parts, a liquefied gas storage and regasification line battery operating system. 3. The method of claim 2,
The priority is the first part, the second part, the third part order, the liquefied gas storage and regasification line battery operating system. 4. The method of claim 2 or 3,
The first part is
A seawater pump for supplying seawater to a consumer;
It includes a glycol water pump for supplying glycol water, which is a heating medium for heat exchange, to a consumer,
The second part includes a cargo pump and a high-pressure pump,
The third part includes at least one compressor, a liquefied gas storage and regasification vessel battery operating system. 5. The method of claim 4,
Further comprising a monitoring unit for monitoring the amount of power of at least one of the generator or the compressor, the compressor includes a plurality of compressors,
a first operating state in which only one of the plurality of compressors is operated;
is operated in a second operating state in which two or more compressors are operated among the plurality of compressors,
The monitoring unit monitors the operating state including the first operating state and the second operating state of the compressor,
The battery is a liquefied gas storage and regasification line battery operating system to supply power to the compressor under a preset condition based on the operating state of the compressor. 5. The method of claim 4,
The battery is
In the second operating state, power corresponding to the load amount on any one of the compressors is supplied to share the load of the generator,
The compressor is
In the first operating state, the first compressor is supplied with power by the battery to replace the power supplied by the generator,
In the second operating state, some compressors of the two or more compressors receive power only from the battery, and some compressors receive power only from the generator.

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