WO2015030277A1

WO2015030277A1 - Cooling jacket and cooling system using same

Info

Publication number: WO2015030277A1
Application number: PCT/KR2013/007824
Authority: WO
Inventors: 김호연; 홍종윤; 김현철; 이고근
Original assignee: 한국가스공사
Priority date: 2013-08-30
Filing date: 2013-08-30
Publication date: 2015-03-05
Also published as: JP2016535231A; KR20160042918A; CN105492315A

Abstract

The present invention relates to a cooling jacket and a cooling system using the same. The cooling jacket comprises: a housing provided to the outer circumference of an LNG pipe and having a hollow tubular shape, in which an inner diameter is formed to be larger than the outer diameter of the LNG pipe such that a heat exchange part is formed between the outer circumferential surface of the LNG pipe and the inner circumferential surface thereof; an inlet formed at one side of the housing so as to introduce air into the heat exchange part; and an outlet formed at the other side of the housing so as to discharge the air cooled in the heat exchange part. Therefore, according to the present invention, the problem of condensation of moisture in the air can be simply solved and efficient cooling is enabled through a simple structure.

Description

Cooling jacket and cooling system using same

The present invention relates to a cooling jacket and a cooling system using the same, and more particularly, to a cooling jacket for cooling by using a cooling pipe of LNG and a cooling system using the same.

In general, liquefied natural gas, that is, LNG (Liquefied Natural Gas) is a natural gas (NG: natural gas) containing methane as the main component is cooled to a very low temperature of minus 162 ℃ to reduce the volume to about 1/600.

As these LNGs emerged as energy resources, LNG carriers and unloading facilities for efficient transportation, which can transport large quantities from the production base to the destination of the demand to use them as energy, were examined.

LNG carriers and unloading facilities require air conditioning facilities for crews or residents, and air conditioning and dehumidifiers for air conditioning facilities need to be installed and power is needed to operate them.

Korean Patent Laid-Open Publication No. 2003-0080163 is disclosed as a technique for cooling by using LNG supplied from an LNG storage tank to a cooling facility of a conventional LNG carrier.

The Korean Laid-Open Patent No. 2003-0080163, as shown in Figure 1, the first heat exchange chamber 20 to cool the pure water by the LNG supplied through the LNG supply pipe 10 in the LNG storage tank and the Pure water is circulated in the second heat exchange chamber 30 for cooling the air supplied from the outside by the pure water cooled in the first heat exchange chamber 20, and the first heat exchange chamber 20 and the second heat exchange chamber 30. Pure water circulation pipe 40 is connected to be able to be connected to the air supply pipe 50 is installed to pass through the inside of the second heat exchange chamber 30 to allow the air cooled in the second heat exchange chamber 30 to flow to the outside. Consists of a system for cooling the air supplied to the residential space of the carrier.

The cooling system using LNG as described above is a system that cools air through pure water, and thus is practically infeasible due to freezing of pure water, which is a medium that is heat exchanged with cryogenic LNG.

An object of the present invention is to provide a cooling system using LNG cooling heat, which solves the above-mentioned problems and easily solves the condensation of moisture in the air and enables efficient cooling with a simple structure.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

The cooling jacket of the present invention for achieving the above object is provided in the outer circumference of the LNG pipe, the hollow pipe whose inner diameter is formed larger than the outer diameter of the LNG pipe so that a heat exchange portion is formed between the outer circumferential surface of the LNG pipe and its inner circumferential surface. A housing having a shape; An inlet formed on one side of the housing to blow air into the heat exchange part; And an outlet formed at the other side of the housing such that the air cooled in the heat exchange part is discharged. It includes.

In addition, the cooling jacket, at least one drain port formed in the lower side of the housing to discharge the condensate generated in the heat exchange unit; It further includes.

The cooling jacket may further include: a drain pipe communicating with the drain port and formed in an S shape; It includes more.

In addition, the housing is characterized in that it is formed in a straight pipe or curved pipe shape to correspond to the shape of the LNG pipe.

In addition, the housing, characterized in that the inner diameter is formed to be 120mm to 200mm larger than the outer diameter of the LNG pipe.

In addition, the housing is configured to include a supporter protruding along the inner circumference of both ends thereof to support the LNG pipe.

The housing may further include a sealing member provided between the LNG pipe and the supporter to seal the heat exchange part.

In addition, the inlet and the outlet are characterized in that the diameter is formed from 150mm to 250mm.

On the other hand, the cooling system of the present invention for achieving the above object, the cooling target space; A cooling jacket provided on an outer circumference of at least one LNG pipe and cooling air in a heat exchanger formed between an outer circumferential surface of the LNG pipe and an inner circumferential surface thereof; A supply pipe connecting the cooling jacket to the cooling target space and supplying air cooled by the heat exchanger to the cooling target space; A recovery pipe connecting the cooling jacket and the cooling target space and recovering air discharged from the cooling target space to the cooling jacket; And a fan provided on the recovery pipe. It includes.

The cooling target space may include a pair of supply ports and a pair of recovery ports, and one end of the supply pipe and the recovery pipe may be branched to the pair of supply ports and the pair of recovery ports, respectively. It is characterized by.

The cooling system may further include a first silencer provided on the recovery pipe to be disposed at a rear end of the fan; It further includes.

In addition, the cooling system, the second silencer provided on the supply pipe; It further includes.

The first silencer and the second silencer may include a sound absorbing material of sponge material provided to surround the outer circumferential surface of the recovery pipe or the supply pipe.

The first silencer and the second silencer may include a main body provided to communicate with the recovery pipe or the supply pipe, a partition wall partitioning a space inside the main body into a first space and a second space, and the first space. A blower pipe communicating with the recovery pipe or the supply pipe in the air phase, a blowout port communicating with the recovery pipe or the supply pipe in the second space, a sound absorbing material provided on the inner surface of the main body, the partition wall and the blown pipe, It is configured to include a multi-hole plate provided on one surface.

In addition, the sound absorbing material is formed of a sponge material, a plurality of projections are repeatedly formed on one surface thereof, the multi-hole plate is formed with a plurality of holes corresponding to the projections of the sound absorbing material so that the projections are exposed through the holes. Characterized in that.

In addition, the plurality of cooling jacket is provided on the outer periphery of the LNG pipe, the air cooled in the heat exchange unit is respectively joined to the supply pipe, the supply pipe is characterized in that the branch is connected to the cooling target space is provided with a plurality. do.

The air discharged from the plurality of cooling target spaces may be joined to the recovery pipes, respectively, and the recovery pipes may be branched to the plurality of cooling jackets.

According to the present invention, by installing a cooling jacket on the outside of the exposed portion of the LNG pipe to solve the problem of condensation of water in the air at the same time, there is an advantage to enable efficient cooling with a simple structure.

1 is a configuration diagram showing a cooling system using cooling heat of a conventional LNG pipe.

2 is a front view showing a cooling jacket according to an embodiment of the present invention.

3 is a side view showing a cooling jacket according to an embodiment of the present invention.

Figure 4 is a plan view showing a cooling jacket according to an embodiment of the present invention.

5 is a front view showing a cooling jacket according to another embodiment of the present invention.

6 is a graph showing a change in freezing thickness according to the change in the LNG flow rate in the LNG pipe according to an embodiment of the present invention.

7 is a graph showing a change in freezing thickness according to the air flow rate change in the cooling system according to an embodiment of the present invention.

8 is a graph showing a change in freezing thickness according to the air temperature change in the cooling system according to an embodiment of the present invention.

9 is a graph showing changes in diameter and pressure loss of the inlets and outlets according to the air flow rate change in the cooling jacket according to an embodiment of the present invention.

10 is a block diagram showing a cooling system according to an embodiment of the present invention.

11 is a schematic view showing a silencer of a cooling system according to an embodiment of the present invention.

12 is a schematic view showing a silencer of a cooling system according to another embodiment of the present invention.

13 is a configuration diagram showing a cooling system according to another embodiment of the present invention.

14 is a block diagram showing a cooling system according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms that are specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. Definitions of these terms should be made based on the contents throughout the specification. And the spirit of the present invention is not limited to the embodiments presented, those skilled in the art of understanding the spirit of the present invention can easily implement other embodiments within the scope of the same idea, but also within the scope of the present invention Of course.

2 to 4 is a front view, a side view and a plan view showing a cooling jacket according to an embodiment of the present invention. A detailed structure of the cooling jacket will be described in detail with reference to FIGS. 2 to 4.

The cooling jacket 100 supplies cold air to a predetermined cooling target space, for example, a residential, business, or industrial building in a residential area of an LNG carrier or an LNG storage tank, by using cold heat of LNG piping. As a device for cooling by air, it comprises a housing 110, an inlet 120, an outlet 130, a drain port 140, a drain pipe 150 and the like.

The housing 110 is formed in a hollow tubular shape is provided on the outer circumference of the LNG piping (P, see Figs. 11 and 12). That is, the housing 110 is mounted to the removal portion of the insulation coating surrounding the LNG pipe and to remove the insulation coating.

The inner diameter of the housing 110 is larger than the outer diameter of the LNG pipe so that the heat exchange part 112 is formed between the inner circumferential surface and the outer circumferential surface of the LNG pipe.

According to an embodiment of the present invention, the housing 110 may have an inner diameter (B of FIG. 2) greater than 120 mm to 200 mm larger than an outer diameter (A of FIG. 2) of the LNG pipe. That is, the relative size of the inner diameter of the housing 110 to the size of the LNG pipe outer diameter was determined by the thickness measurement experiment of the ice formed on the outer periphery of the LNG pipe as follows.

Hereinafter, the optimum inner diameter size of the housing 110 determined in consideration of the thickness of freezing formed on the outer circumference of the LNG pipe will be described with a graph based on experimental data shown in FIGS. 6 to 8.

FIG. 6 is a graph illustrating a change in freezing thickness according to a change in LNG flow rate in an LNG pipe according to an embodiment of the present invention. As the flow rate flowing through the LNG pipe increases, the cooling capacity is approximately 0.18 RT (Ton). convergence, and the thickness of the ice formed on the outer circumference of the LNG pipe converges to approximately 50 mm.

7 is a graph showing a change in freezing thickness according to a change in air flow rate in a cooling system according to an exemplary embodiment of the present invention, and the cooling speed is proportionally increased as the flow rate of air flowing inside the housing 110 increases. While the capacity increases, the thickness of the ice formed on the outer periphery of the LNG piping decreases in inverse proportion.

According to an embodiment of the present invention, when the optimum flow rate of air flowing in the housing 110 is approximately 10 m / s to 20 m / s, the outer circumference of the LNG pipe has a thickness of approximately 30 mm to 40 mm. Freezing forms.

8 is a graph showing a change in freezing thickness according to a change in air temperature in a cooling system according to an embodiment of the present invention. As the temperature of the air flowing inside the housing 110 increases, cooling is proportionally increased. While the capacity increases, the thickness of the ice formed on the outer periphery of the LNG piping decreases in inverse proportion.

According to an embodiment of the present invention, if the optimum temperature of the air flowing in the interior of the housing 110 is approximately 20 ℃ to 25 ℃, the outer circumference of the LNG pipe has a thickness of about 50mm to 60mm Is formed.

In conclusion, according to the graphs illustrated in FIGS. 6 to 8, the outer circumference of the LNG pipe when considering the flow rate of LNG flowing through the LNG pipe, the flow rate and temperature of the air flowing in the housing 110, etc. It can be inferred that the maximum thickness of the ice that can be formed in is 60 mm.

Therefore, the inner diameter of the housing 110 is preferably formed to be at least 120 mm larger than the outer diameter of the LNG pipe so that the heat exchange part 112 is formed between the inner circumference of the housing 110 and the outer circumference of the LNG pipe. In addition, it is preferable to limit the inner diameter of the housing 110 to 200mm for optimal heat exchange in the heat exchanger 112.

The housing 110 includes a supporter 114 protruding along the inner circumference of both ends thereof, and a sealing member 116 provided between the supporter 114 and the LNG pipe.

The supporter 114 is provided so that the housing 110 is supported by the LNG pipe passing therein, and the sealing member 116 is a heat exchanger 112 formed between the housing 110 and the LNG pipe. ) Is provided with an O-ring to seal the

In addition, the housing 110 includes a coupling member 118 and the like. According to an embodiment of the present invention, the housing 110 is formed to be separated in half along the longitudinal direction in order to be easily attached to and detached from the LNG pipe. The coupling member 118 is provided in plural, and the housing is separated into a pair ( 110) serves to couple and fix each other.

Therefore, the cooling jacket 100 can be easily replaced when changing the design according to the cooling load.

The inlet 120 is formed at one side of the housing 110 to blow air into the heat exchange part 112, and the outlet 130 is formed at the other side of the housing 110 to form the inlet 120. Through the blown into the heat exchange unit 112 through to discharge the cooled air.

According to an embodiment of the present invention, the inlet 120 and the outlet 130 are preferably formed with a diameter (C of FIG. 2) of 150 mm to 250 mm. That is, the inlet 120 and the outlet 130 were determined by the air flow rate change measurement experiment in the cooling jacket 100 as follows.

Hereinafter, the diameters of the inlet 120 and the outlet 130 determined in consideration of the air flow rate change in the cooling jacket 100 will be described with a graph based on the experimental data shown in FIG. 9.

9 is a graph showing a change in diameter and pressure loss of the inlets and outlets according to the air flow rate change in the cooling jacket according to an embodiment of the present invention, wherein the air flow rate flowing inside the housing 110 is While inversely proportional to the diameter size of inlet 120 and outlet 130, the pressure drop is proportional to the air flow rate.

As shown in FIG. 9, the intersection point of the diameter change diagram and the pressure loss change diagram of the inlet 120 and the outlet 130 according to the air flow rate is approximately the diameter of the inlet 120 and the outlet 130. It is formed at 8 inches or 200 mm.

In conclusion, according to the graph illustrated in FIG. 9, the diameter of the inlet 120 and the outlet 130 according to the air flow rate flowing through the inside of the housing 110 and the change in pressure loss are considered when the inlet ( 120 and the outlet 130 is preferably formed in a diameter of 150mm to 250mm.

At least one drain port 140 is formed at a lower side of the housing 110 to discharge the condensed water generated in the heat exchange part 112 to the outside, and the drain pipe 150 is the heat exchange part 112. In order to prevent the outflow of air from the 'S' is formed in a tubular shape is in communication with the drain port 140.

That is, since the condensate generated in the heat exchange part 112 is confined to the drain pipe 150 bent in an 'S' shape in the upward direction, the upper end of the drain pipe 150 when the valve 152 is opened. Only condensate overflowed with air is discharged. Therefore, the air in the heat exchange part 112 does not flow to the outside.

On the other hand, the cooling jacket 100 according to an embodiment of the present invention is formed as a curved pipe as shown in Figures 2 to 4 is not only applied to the elbow (elbow) of the LNG pipe, as shown in Figure 5 According to another embodiment of the invention is formed in a straight pipe to be applied to the straight LNG pipe.

Since the housing 100 formed of the straight pipe illustrated in FIG. 5 is the same as the other configuration except for the shape of the housing 100 formed of the curved pipe illustrated in FIGS. 2 to 4, a detailed description thereof will be provided. Omit.

10 is a block diagram showing a cooling system according to an embodiment of the present invention. A cooling system using the cooling jacket 100 described above with reference to FIG. 10 will be described in detail.

As applied to the unloading control room of the cooling system LNG unloading facility, the residential facility of the LNG carrier or the surrounding cooling facility in which the LNG storage tank is installed, the cooling target space 600, the cooling jacket 100, the supply pipe 200, the recovery pipe 300, a fan 400, a first silencer 510, a second silencer 520, and the like.

The cooling target space 600 is a space to be cooled by the cooling air generated in the cooling jacket 100, and a pair of supply ports 610 to which cooling air is supplied and inside the cooling target space 600. It is configured to include a pair of recovery port 620 is the air of the discharge.

The cooling jacket 100 is provided in at least one LNG pipe (P in FIGS. 13 and 14) and cools the air in the heat exchange part 112 formed between the outer circumferential surface of the LNG pipe and its inner circumferential surface. Since the detailed structure of the cooling jacket 100 has been described above, a detailed description thereof will be omitted.

The supply pipe 200 connects the cooling jacket 100 and the cooling target space 600. Specifically, the other end of the supply pipe 200 is connected to the outlet 130 of the cooling jacket 100, and one end of the supply pipe 200 is connected to the cooling target space 600 so that the supply pipe 200 is The air cooled by the heat exchange part 112 is supplied to the cooling target space 600.

On the other hand, since the supply port 610 of the cooling target space 600 is provided in a pair, one end of the supply pipe 200 is branched in two rows so as to be connected to the pair of supply ports 610, respectively.

The recovery pipe 300 connects the cooling jacket 100 and the cooling target space 600 similarly to the supply pipe 200. Specifically, the other end of the recovery pipe 300 is connected to the inlet 120 of the cooling jacket 100, and one end of the recovery pipe 300 is connected to the cooling target space 600 so that the recovery pipe ( 300 recovers air discharged from the cooling target space 600 to the cooling jacket 100.

Meanwhile, since the recovery ports 620 of the cooling target space 600 are provided in pairs, one end of the recovery pipe 300 is branched into two rows so as to be connected to the pair of recovery ports 620, respectively. .

The fan 400 is provided on the recovery pipe 300, and the air discharged from the cooling target space 600 passes through the recovery pipe 300, the cooling jacket 100, and the supply pipe 200. After that, it is supplied to the cooling target space 600.

That is, the fan 400 circulates the air entering and exiting the cooling target space 600 to exchange heat with the LNG pipe in the heat exchange part 112 of the cooling jacket 100.

On the other hand, according to an embodiment of the present invention in order to reduce the vibration and noise generated by the operation of the fan 400, the dustproof structure 410 is provided at the lower end of the fan 400, the fan 400 ) Is installed in the external silencer (420).

The first silencer 510 and the second silencer 520 are intended to alleviate the fatigue and discomfort of the occupant by generating noise in the cooling target space 600 according to the installation of the fan 400.

As shown in FIG. 10, the first silencer 510 is provided on the recovery pipe 300 to be disposed at the rear end of the fan 400, and the second silencer 520 is disposed on the supply pipe 200. To be prepared.

According to one embodiment of the invention, the distance between the rear end side of the fan 400 and the cooling target space 600 is less than 50m, between the front end side of the fan 400 and the cooling target space 600 If the distance of 50m or more, only the first silencer 510 is installed alone.

On the other hand, when the distance between the front side and the rear end side of the fan 400 and the cooling target space 600 are all within 50m, not only the first silencer 510 but also the second silencer 520 are installed together. It is desirable to be.

11 is a schematic view showing a silencer of a cooling system according to an embodiment of the present invention, wherein the first silencer 510 and the second silencer 520 are provided in a linear type, that is, the number of times. It is preferably configured to include a sound absorbing material of a sponge (sponge) material provided to surround the outer circumferential surface of the pipe 300 or the supply pipe 200.

12 is a schematic view showing a silencer of a cooling system according to another embodiment of the present invention, wherein the first silencer 510 and the second silencer 520 are provided in a muffler type, and a main body 540. ), The partition wall 570, the blow pipe 550, the blowout port 560, the sound absorbing material 580, and the multi-hole plate 590 are preferably configured.

Specifically, the main body 540 is provided in the form of a hollow box so as to communicate with the recovery pipe 300 or the supply pipe 200, the partition 570 is a space inside the main body 540 first space And a second space. Here, the first space and the second space refer to an upper space and a lower space inside the main body 540, respectively.

The blowing pipe 550 communicates with the recovery pipe 300 or the supply pipe 200 on the first space, and the outlet 560 is the recovery pipe 300 or the supply pipe 200 on the second space. ).

Therefore, vibration and noise generated by the air flowing through the recovery pipe 300 or the supply pipe 200 are reduced in the process of passing through the blowing pipe 550, the main body 540, and the outlet 560. .

On the other hand, the sound absorbing material 580 is provided on the inner surface of the body 540, the outer surface of the partition 570 and the blowing pipe 550, respectively, is formed of a sponge material to reduce vibration and noise. In addition, a plurality of protrusions are repeatedly formed on one surface of the sound absorbing material 580 to improve noise and vibration reduction effects.

The multi-hole plate 590 is provided on one surface of the sound absorbing material 580, a plurality of holes corresponding to the projection of the sound absorbing material 580 is formed so that the projections of the sound absorbing material 580 to the multi-hole plate 590 It is exposed through the formed hole.

That is, the multi-hole plate 590 allows the sound absorbing material 580 to be closely fixed to the wall W of each component of the silencer, and the debris of the sound absorbing material 580 formed of a sponge material flows into the silencer. Do not

13 is a block diagram showing a cooling system according to another embodiment of the present invention, Figure 14 is a block diagram showing a cooling system according to another embodiment of the present invention.

Another embodiment of the present invention relates to a cooling system in which a plurality of cooling target spaces 600 and a cooling jacket 100 are provided, and another embodiment of the present invention is a cooling target space 600 and a cooling jacket 100 as well. In addition, the LNG piping (P) is also provided for a cooling system is provided with a plurality, in the following description of the same configuration as the other cooling system in one embodiment of the present invention will be omitted and the difference will be described in detail.

13 and 14, the cooling jacket 100 is provided in plural on the outer circumference of the LNG pipe (P) is provided with at least one, the air cooled in the heat exchange unit 112 of the cooling jacket (100). Are respectively joined to the supply pipe 200 through the outlet 130.

In addition, the supply pipe 200 is branched and connected to the plurality of cooling target spaces 600, so that the air cooled in the cooling jacket 100 is supplied to the plurality of cooling target spaces 600, respectively.

Meanwhile, the air discharged from the plurality of cooling target spaces 600 joins the recovery pipe 300, respectively, and the recovery pipe 300 is branched to the inlet 120 of the plurality of cooling jackets 100. By being connected, the air passing through the plurality of cooling target spaces 600 is recovered to each of the plurality of cooling jackets 100 again.

According to such a cooling system, when a plurality of cooling target space 600 is provided, efficient cooling is possible.

Although embodiments according to the present invention have been described above, these are merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments of the present invention are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the following claims.

Claims

A housing having a hollow tubular shape provided on an outer circumference of the LNG pipe and having an inner diameter larger than an outer diameter of the LNG pipe so that a heat exchange portion is formed between an outer circumferential surface of the LNG pipe and an inner circumferential surface thereof;

An inlet formed on one side of the housing to blow air into the heat exchange part; And

An outlet formed on the other side of the housing to discharge air cooled in the heat exchanger; Cooling jacket comprising a.
The method of claim 1,

At least one drain port formed at a lower side of the housing to discharge condensate generated in the heat exchange part; Cooling jacket containing more.
The method of claim 2,

A drain pipe communicating with the drain port and formed in an S shape; Cooling jacket containing more.
The method of claim 1,

Cooling jacket, characterized in that the housing is formed in a straight pipe or curved pipe shape to correspond to the shape of the LNG pipe.
The method of claim 1,

The housing is a cooling jacket, characterized in that the inner diameter is formed to be 120mm to 200mm larger than the outer diameter of the LNG pipe.
The method of claim 1,

The housing,

Cooling jacket comprising a supporter which protrudes along the inner circumference of the both ends to be supported by the LNG pipe.
The method of claim 6,

The housing,

Cooling jacket further comprises a sealing member provided between the LNG pipe and the supporter to seal the heat exchange unit.
The method of claim 1,

The inlet and the outlet, the cooling jacket, characterized in that the diameter is formed from 150mm to 250mm.
Cooling target space;

A cooling jacket provided on an outer circumference of at least one LNG pipe and cooling air in a heat exchanger formed between an outer circumferential surface of the LNG pipe and an inner circumferential surface thereof;

A supply pipe connecting the cooling jacket to the cooling target space and supplying air cooled by the heat exchanger to the cooling target space;

A recovery pipe connecting the cooling jacket and the cooling target space and recovering air discharged from the cooling target space to the cooling jacket; And

A fan provided on the recovery pipe; Cooling system comprising a.
The method of claim 9,

The cooling target space includes a pair of supply ports and a pair of recovery ports, and one end of the supply pipe and the recovery pipe is branched to the pair of supply ports and the pair of recovery ports, respectively. Cooling system.
The method of claim 9,

A first silencer provided on the recovery pipe to be disposed at a rear end of the fan; Cooling system further comprising.
The method of claim 11,

A second silencer provided on the supply pipe; Cooling system further comprising.
The method of claim 12,

The first silencer and the second silencer,

And a sponge sound absorbing material provided to surround the outer circumferential surface of the recovery pipe or the supply pipe.
The method of claim 12,

The first silencer and the second silencer,

A main body provided to communicate with the recovery pipe or the supply pipe;

Partition walls each partitioning a space inside the main body into a first space and a second space;

A blowing pipe communicating with the recovery pipe or the supply pipe on the first space;

An outlet for communicating with the recovery pipe or the supply pipe on the second space;

Sound absorbing material provided on the inner surface of the main body, the outer surface of the partition wall and the blowing pipe,

Cooling system comprising a multi-hole plate provided on one surface of the sound absorbing material.
The method of claim 14,

The sound absorbing material is formed of a sponge material, a plurality of projections are repeatedly formed on one surface thereof, the multi-hole plate is formed so that a plurality of holes corresponding to the projections of the sound absorbing material is formed so that the projections are exposed through the holes. Cooling system characterized by.
The method of claim 9,

The cooling jacket is provided in plural on the outer circumference of the LNG pipe, the air cooled in the heat exchange unit is joined to the supply pipe, respectively, the cooling pipe characterized in that the branch is connected to the cooling target space provided in plurality. system.
The method of claim 16,

And the air discharged from the plurality of cooling target spaces respectively joins the recovery pipes, and the recovery pipes are branched and connected to the plurality of cooling jackets.