KR102352166B1 - Liquefied Gas Regasification System and ship having the same - Google Patents

Abstract

The present invention relates to a liquefied gas regasification system and a ship including the same, and includes a vaporizer provided in the hull for vaporizing liquefied gas, and a vaporizer provided in the hull to introduce seawater from outside the hull to the vaporizer or from the vaporizer A seawater transfer unit for discharging the discharged seawater to the outside of the hull, and a gas transfer line through which liquefied gas moves therein and is connected to an external consumer via the vaporization unit, wherein the vaporization unit includes a sump recessed in the deck of the hull (sump) structure, seawater is continuously supplied to the inside through the seawater transfer unit, and a part of the gas transfer line is submerged in seawater to exchange heat between liquefied gas and seawater.

Description

Liquefied gas regasification system and ship including same

The present invention relates to a liquefied gas regasification system and a ship including the same.

Recently, as environmental regulations are strengthened, the use of liquefied natural gas, which is close to an eco-friendly fuel, among various fuels is increasing. Liquefied natural gas is generally transported through LNG carriers, and in this case, the liquefied natural gas can be stored in the tank of the LNG carrier in a liquid state by lowering the temperature to -163°C or less under 1 atm. When liquefied natural gas becomes liquid, its volume is reduced to 1/600 compared to the gaseous state, so transport efficiency can be increased.

However, since liquefied natural gas is generally consumed in a gaseous state rather than in a liquid state, liquefied natural gas stored and transported in a liquid state needs to be regasified, so a regasification facility is used.

At this time, the regasification facility may be equipped with an LNG carrier, FLNG (Floating Liquefied Natural Gas), FSRU (Floating Storage Regasification Unit), etc. on a ship or may be provided on land. Regasification is realized by heating the gas.

However, since liquefied natural gas is placed in a cryogenic state close to -160°C, if the temperature difference with the heat source during heat exchange is widened, there may be problems in the durability of the heat exchanger that heats the liquefied natural gas. In addition, when liquefied natural gas is heated using seawater, there is a risk of corrosion in the heat exchanger.

In addition, in the case of FSRU, it is difficult to dry docking for a long period of 20 to 30 years because there is no disruption to onshore gas supply. For this reason, shell & tube type heat exchangers are mainly used in large FSRU regasification systems, and since these shell & tube type heat exchangers are large in size and difficult to separate, maintenance and repair are difficult.

In addition, there was a problem in that a large amount of cost occurs when attaching and detaching to repair a leak of liquefied gas in a heat exchanger applied to a conventional FSRU regasification system.

The present invention was created to solve the problems of the prior art as described above, and an object of the present invention is to integrate the shell of the heat exchanger in a ship and open the body of the heat exchanger to transfer gas from the outside. To provide a liquefied gas regasification system capable of visually identifying leakage and corrosion of liquefied gas in a line, and a ship including the same.

Liquefied gas regasification system according to an aspect of the present invention includes a hull, a vaporizer provided in the hull to vaporize liquefied gas, and a vaporizer provided in the hull to introduce seawater from the outside of the hull to the vaporization unit or from the vaporization unit It includes a seawater transfer unit for discharging the discharged seawater to the outside of the hull, and a gas transfer line that moves liquefied gas therein and is connected to an external customer via the vaporizer.

The vaporizer is provided in a sump structure recessed in the deck of the hull, seawater is continuously supplied to the inside through the seawater transfer unit, and a part of the gas transfer line is submerged in seawater to supply liquefied gas and seawater can be heat exchanged.

Specifically, the seawater transport unit includes a seawater inlet line for introducing seawater from the outside of the hull, and a seawater outlet line for discharging seawater introduced from the seawater inlet line to the outside of the hull, and the vaporization unit, the seawater The inlet line and the seawater discharge line are connected to each other to exchange heat with the liquefied gas through seawater flowing from the seawater inlet line.

Specifically, the vaporization unit may include a heat medium circulation line formed in a closed loop shape to circulate heat to the inside, and a vaporization unit auxiliary unit for exchanging heat with seawater flowing in from the seawater transfer unit and the heat. .

Specifically, the vaporization unit may include a plate that increases the heat transfer area with seawater therein.

Specifically, it may further include a pump provided on the seawater transfer unit to introduce seawater outside the hull to the seawater transfer unit.

Specifically, it may further include a valve provided on the seawater transfer unit for controlling the amount of seawater flowing in and discharged from the seawater transfer unit according to the amount of seawater inside the vaporization unit.

Specifically, it may include a cover portion provided so as to be able to open and close the vaporization portion so as to expose the seawater transfer portion.

A ship according to an aspect of the present invention is characterized in that it has the liquefied gas regasification system.

The liquefied gas regasification system and the ship including the same according to the present invention can reduce the manufacturing period and cost by integrally manufacturing the shell part of the heat exchanger on the ship, and heat exchange so that the gas transfer line is exposed. By opening the body of the aircraft, it is possible to visually identify leaks and corrosion of liquefied gas, thereby reducing repair costs and facilitating maintenance.

1 is a view showing a liquefied gas regasification system according to an embodiment of the present invention;
Figure 2 is a view showing the vaporization unit of Figure 1;
3 is a view showing a liquefied gas regasification system according to another embodiment of FIG.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In the present specification, in adding reference numbers to the components of each drawing, it should be noted that only the same components are given the same number as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a liquefied gas regasification system according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating the vaporization unit of FIG. 1 .

Referring to FIG. 1 , a hull 10 , a seawater transport unit 20 , a gas transport line 30 , a vaporizer 40 , a cover part 45 , a plate 50 , a pump 60 , a valve 70 . includes

The hull 10 may be composed of a bow (not shown), a stern (not shown), and an upper deck (not shown). The hull 10 is a liquefied gas regasification vessel (LNG RV) or floating liquefied gas in which a gas regasification system is installed on a liquefied gas carrier in order to regasify the liquefied gas at sea and supply the liquefied gas to the onshore terminal. It may be a gas storage and regasification facility (FSRU).

The hull 10 may be formed in a sump structure in which a deck is depressed. Thereby, the hull 10 is easy to maintain, since it is possible to visually identify the liquefied gas or corrosion leaking from the vaporizer 40 from the outside (deck), and there is no need to remove the vaporizer 40 Therefore, it has the effect of significantly reducing the cost burden. In addition, the hull 10 may have the vaporizing unit 40 installed in the sump structure, but preferably, the vaporizing unit 40 may be integrally formed in the sump structure as in the present invention as in the present invention.

The seawater transfer unit 20 may be provided in the hull 10 , and may introduce seawater from the outside of the hull 10 into the vaporizer 40 or discharge seawater discharged from the vaporizer 40 to the outside of the hull 10 .

For example, the seawater transfer unit 20 includes a seawater inlet line 22 for introducing seawater from the outside of the hull 10, and a seawater outlet line for discharging seawater introduced from the seawater inlet line 22 to the outside of the hull 10 ( 24) may be included. The seawater transfer unit 20 may be provided by connecting the seawater inlet line 22 and the seawater outlet line 24 to the vaporization unit 40 .

The seawater inlet line 22 may be connected to the vaporization unit 40 to move seawater flowing in from the outside of the hull 10 to the vaporization unit 40 . The seawater discharge line 24 may be connected from the vaporization unit 40 to discharge seawater of the vaporization unit 40 to the outside of the hull 10 .

At least one of the seawater inlet line 22 and the seawater outlet line 24 may be provided with a pump 60 and a valve unit 70 to be described later. Preferably, the pump 60 may be provided in the seawater inlet line 22 as in an embodiment of the present invention.

In the gas transfer line 30 , liquefied gas moves therein and may be connected to an external customer via the vaporizer 40 . The gas transfer line 30 may be provided to be submerged in seawater of the vaporizer 40 to be described later. The gas transfer line 30 may be provided with a strong material and corrosion-preventing treatment from corrosion caused by seawater.

The gas transfer line 30 may discharge the liquefied gas vaporized (heat exchanged) between the liquefied gas and seawater to a consumer. A part of the gas transfer line 30 may be buried in the vaporization unit 40 , a liquefied gas supply line may be connected to a liquefied gas storage tank (not shown), and a liquefied gas discharge line may be connected to a consumer.

For example, the gas transfer line 30 may include a liquefied gas supply line for supplying liquefied gas to the vaporization unit 40 and a liquefied gas discharge line for transferring the liquefied gas vaporized in the vaporization unit 40 to a consumer.

Accordingly, the gas transfer line 30 moves the liquefied gas supplied from the liquefied gas supply line to the gas transfer line 30 embedded in the vaporizer 40 and exchanges heat with seawater, and then vaporizes it through the liquefied gas discharge line. (Heat exchange) liquefied gas can be discharged to the customer.

According to the gas transfer line 30 of the present invention, since a part of the gas transfer line 30 is exposed above the vaporization unit 40 to be described later, it is possible to check the leakage of liquefied gas from the gas transfer line 30, , and corrosion of the gas transfer line 30 can be visually identified, so maintenance is easy even if the gas transfer line 30 is not detached, and the cost is reduced.

The vaporizer 40 may be installed on the upper portion of the hull 10 , and may vaporize the liquefied gas supplied from the gas transfer line 30 . The vaporizer 40 may receive seawater from the seawater transfer unit 20 and regasify the liquefied gas.

Here, the consumer to which the vaporized liquefied gas is supplied may be an engine or turbine that produces energy, or may be a final consumer such as city gas or a general household, and the liquefied gas is delivered to the demand in a state vaporized by the vaporizer 40 . can be

For example, the vaporizer 40 may have a sump structure recessed in the deck of the hull 10 to vaporize the liquefied gas. Seawater may be continuously supplied to the inside of the vaporization unit 40 through the seawater transfer unit 20 .

Here, the vaporization unit 40 is not limited to being formed of a sump structure, and a vaporization unit may be additionally provided in the sump structure of the hull 10 . In addition, the vaporization unit 40 may include a cover unit 45 that selectively determines whether the seawater transport unit 20 is exposed by opening and closing.

The vaporizer 40 is provided so that the gas transfer line 30 is submerged in seawater provided therein, so that the liquefied gas can exchange heat with seawater. The vaporizer 40 may be opened upward to expose the seawater and the gas transfer line 30 submerged in the seawater to the outside. The vaporizer 40 may be partially opened to expose only a portion of the gas transfer line 30 to the outside.

Since the gas transfer line 30 and the seawater are exposed to the outside in the vaporization unit 40 and can exchange heat with the outside air, it is possible to exchange heat with the seawater and the liquefied gas.

According to the vaporization unit 40 of the present invention, through the open portion of the vaporization unit 40, the liquefied gas leaking from the vaporization unit 40 and the gas transfer line 30, whether or not corrosion, etc. outside (deck) can be easily identified, thereby having the effect of convenient repair.

In addition, since the gas transfer line 30 can be easily detached from the vaporizer 40 , it is possible to secure for work such as repair and maintenance, and there is an effect that painting, cleaning, etc. are easy.

The vaporization unit 40 is connected to the seawater inlet line 22 and the seawater discharge line 24 , and may move the seawater flowing in from the seawater inlet line 22 to the seawater discharge line 24 and discharge it. The vaporizer 40 may vaporize (heat exchange) the liquefied gas through the seawater therein. Accordingly, seawater in the vaporization unit 40 may provide vaporization heat to the liquefied gas to vaporize the liquefied gas.

Vaporized liquefied gas may be supplied to a demand through a liquefied gas discharge line, and the demand may be an engine or turbine that produces energy, or a final demand such as city gas or general households.

Meanwhile, a sensor unit may be provided inside the vaporization unit 40 and/or at the upper and lower portions of the seawater transfer unit 20 . In addition, the vaporization unit 40 may provide a plate 50 inside the vaporization unit 40 to increase the heat transfer area with seawater.

Such, the vaporization unit 40 is possible to heat exchange with seawater and/or liquefied gas using the outside air, so that the efficiency is improved, and by providing integrally with the hull 10, the manufacturing period can be shortened, thereby reducing the cost. there is an effect

As the vaporizer 40 is provided in the sump region of the hull 10, the installation position of the vaporizer 40 is lowered, and the pump pressure value for sending seawater flowing in from the seawater transfer unit 20 to the vaporizer 40 is It can be lowered, resulting in cost savings.

The cover part 45 may be provided in the vaporization part 40 to selectively determine whether or not to expose the seawater transport part. The cover part 45 may be provided above the vaporization part 40 to open and close the sump structure of the vaporization part 40 .

For example, the cover part 45 may open the vaporization part 40 when necessary for maintenance of the vaporization part 40 or maintenance of the seawater transfer part 20 . In addition, the cover part 45 can be closed to prevent the inflow of foreign substances into the vaporization part 40 to improve convenience.

The sensor unit may include a temperature sensor for measuring the temperature of seawater, a seawater quantity sensor for measuring the amount of seawater inside the vaporization unit 40 , and the like. For example, the sensor unit measures the seawater temperature using a temperature sensor inside the vaporization unit 40, detects whether the seawater temperature has sufficiently risen to an appropriate temperature to vaporize the liquefied gas, and transmits it to the control unit.

In addition, the seawater amount detection sensor may transmit the amount of seawater measured in the vaporization unit to the control unit. The control unit may control the amount of seawater in the vaporization unit 40 by being transmitted to the pump 60 and/or the valve unit 70 to be described later according to the seawater value (temperature of seawater) measured by the temperature sensor. Here, the appropriate temperature may be a preset temperature as a temperature for vaporizing the liquefied gas, and may be selectively preset by a user.

The plate 50 may be provided inside the vaporization unit 40 to increase the heat transfer area with seawater, as shown in FIG. 2 . The plate 50 may be provided in a zigzag and/or sequential manner in the direction in which the seawater moves.

Preferably, the plate 50 may be provided in a jig material to increase the heat exchange area with seawater passing through the vaporization unit 40 . The plate 50 may be provided so that the gas transfer line 30 passes through the plate 50 .

The plate 50 increases the heat transfer area with seawater in the vaporization unit 40 to increase the heat exchange rate, which is more effective in vaporizing liquefied gas using seawater.

The pump 60 may be provided on the seawater transfer unit 20 to introduce seawater outside the hull 10 into the seawater transfer unit 20 . For example, the pump 60 may be provided in the seawater inlet line 22 to adjust the amount of seawater flowing into the seawater inlet line 22 .

The pump 60 may variably control the flow rate of the discharged seawater according to the temperature of the seawater, and may be a variable capacity pump capable of variably controlling the flow rate of the discharged seawater.

The pump 60 may be connected to the controller by wire or wirelessly, and may receive a load control signal of the pump 60 from the controller to change the flow rate of seawater discharged through the control of the controller. A valve 70 for controlling the amount of seawater flowing in from the pump 60 may be provided at the rear end of the pump 60 .

The pump 60 may be provided on the seawater inlet line 22, pressurize the seawater outside the hull 10 and supply it to the vaporization unit. The pump 60 may be a submersible pump when provided inside the 22 . At the rear end of the pump 60 , a valve part 70 capable of adjusting the amount of seawater flowing in from the pump 60 may be provided.

The valve unit 70 may be provided on the seawater transfer unit 20 to adjust the amount of seawater introduced and discharged from the seawater transfer unit 20 according to the amount of seawater inside the vaporization unit 40 . The valve part 70 may be provided on the seawater inlet line 22 or the seawater outlet line 24 to control the flow rate of seawater. The valve part 70 may be provided at the rear end of the pump 60 provided in the seawater inlet line 22 . The valve unit 70 may adjust the amount of seawater introduced through the pump 60 .

In addition, the valve unit 70 is provided in the seawater discharge line 24, it is possible to adjust the discharge amount according to the temperature. The valve unit 70 may adjust the amount of seawater in the vaporization unit 40 according to the seawater temperature inside the vaporization unit 40 to regasify the liquefied gas.

The valve unit 70 may be connected to the control unit by wire or wirelessly, and may receive an opening degree control command from the control unit to adjust the opening degree.

3 is a view showing a liquefied gas regasification system according to another embodiment of FIG.

Another embodiment of the liquefied gas regasification system will be described with reference to FIG. 3 , including a vaporization unit 40 , a heat medium circulation line 42 , and a vaporization unit auxiliary unit 80 .

The vaporizer 40 may be provided with a heat exchange fruit with liquefied gas therein. Here, the fruit may be glycol water, propane or organic refrigerant, fresh water, etc., and the fruit in one example of the present invention is described as using glycol water.

On the other hand, the vaporizer 40 may be an IHM (Intermediate Heating Medium) system for producing glycol water by mixing glycol and water. As such, the IHM system is a commercialized technology and a detailed description thereof will be omitted.

The vaporization unit 40 may circulate the glycol water in the vaporization unit 40 and heat it again to exchange heat between the glycol water and the liquefied gas. In addition, the vaporization unit 40 can heat the liquefied gas while reducing the risk of corrosion of the heat exchanger and pipes by using various glycol uters. Glycol water has the advantages of being safe, inexpensive, and easy to change its composition because it is non-explosive.

The vaporization unit 40 may be provided with a body portion having an upper opening, and a heat medium circulation line 42 provided in a closed loop form from the body portion.

The upper portion of the body portion is opened, and the gas transfer line 30 is provided. The body portion is provided with glycol water, and the gas transfer line 30 may be submerged in the glycol water. In addition, the body portion may be provided with a plate 50 to have a large heat exchange area with glycol water. Here, since the plate 50 has been described in one embodiment, a detailed description thereof will be omitted below.

The heat medium circulation line 42 may be provided in the form of a closed loop. A pump 60 may be provided on the heat medium circulation line 42 . The heat medium circulation line 42 is connected to the vaporization unit 40 and circulates the heat inside to supply the heat to the vaporization unit 40 . The heat medium circulation line 42 may raise the temperature of the heat medium through heat exchange with the vaporizer auxiliary unit 80 to be described later.

The heat medium circulation line 42 may increase the reheating temperature of the heat medium by exchanging heat with seawater to increase the heating temperature during reheating of the heat medium. It may include a vaporizer auxiliary unit 80 for connecting the seawater transfer unit (20). The fruit moves along the heat medium circulation line 42 and is reheated and then moved to the body to vaporize the liquefied gas again.

The sensor unit may include a temperature sensor for measuring the temperature of the heat medium (glycol water), and a water level measuring sensor for measuring the water level of the glycol water. The temperature sensor is provided on the heat medium circulation line 42 to measure the temperature of the flowing glycol water. The temperature sensor may be connected to the controller by wire or wirelessly and transmit the measured temperature of the glycol water flowing on the heat medium circulation line 42 to the controller. In addition, since the water level measuring sensor is the same as described in the embodiment, a detailed description thereof will be omitted.

The controller may control the opening degree of the valve unit 70 and the load of the pump 60 according to the temperature of the heat medium (glycol water) flowing on the heat medium circulation line 42 . The control unit may receive the temperature of the glycol water flowing on the heat medium circulation line 42 measured by being connected to the temperature sensor by wire or wirelessly, and connected to the valve unit 70 and the pump 60 by wire or wirelessly to transmit an opening degree control command or a load control command.

For example, if the temperature of the glycol water received from the temperature sensor is equal to or greater than a preset temperature, the control unit controls to lower the load of the seawater pump 60 and increase the opening degree of the valve unit 70, and the glycol water received from the temperature sensor When the temperature of is less than the preset temperature, it is possible to control to increase the load of the seawater pump 60 and reduce the opening degree of the valve unit (70).

The pump 60 is provided between the body portion and the heat medium circulation line 42 , and can circulate heat (glycol water) on the heat medium circulation line 42 . The pump 60 may receive the cooled glycol water from the vaporization unit 40 and supply it to the vaporization unit 40 . For example, the pump 60 may be a centrifugal pump.

Meanwhile, the pump 60 may be provided to circulate and supply seawater to the vaporizer 40 and the vaporizer auxiliary unit 80 , respectively. The pump 60 may include a seawater circulation pump 62 provided in the vaporization unit 40 and a seawater supply pump 64 provided in the seawater transfer unit 20 .

The seawater circulation pump 62 may be provided in parallel as described in the liquefied gas pump 30, and at least one of them may be used as a main, and the other may be used as an auxiliary. Since the load of the seawater circulation pump 64 varies according to the viscosity of the seawater, the load of the seawater circulation pump 62 may be maintained below a reference value. Therefore, it is possible to reduce power consumption.

The seawater supply pump 64 may be provided on the seawater transfer unit 20 to introduce seawater from the outside of the hull 10 into the seawater transfer unit 20 . For example, the pump 60 is provided in the seawater inlet line 22 to control the amount of seawater flowing into the seawater inlet line 22, and is similar to the pump of one embodiment, so a detailed description thereof will be omitted.

The valve unit 70 may be provided between the pump 60 and the vaporizer auxiliary unit 80 to be described later, and the opening degree may be adjusted according to the temperature of the glycol water in the vaporization unit 40 . For example, when the temperature sensor detects that the temperature of the glycol winter in the vaporization unit 40 is low, the valve unit 70 may increase the opening amount to exchange heat between seawater and glycol water.

In addition, when the temperature sensor detects that the temperature of the glycol water in the vaporization unit 40 is high, the valve unit 70 does not need to have a high heat exchange rate between the glycol water and seawater, so it is possible to increase energy efficiency by reducing the opening amount. there is an effect

The vaporizer auxiliary unit 80 may be provided to exchange heat between glycol water and seawater flowing in from the seawater transfer unit 20 . The vaporizer auxiliary unit 80 may be connected to surround the heat medium circulation line 42 and the seawater transfer unit 20 to achieve mutual heat exchange.

In the vaporization unit auxiliary unit 80, the heat-exchanged glycol water moves along the heat medium circulation line 42 again, and comes into contact with the glycol water to increase the temperature of the glycol water.

According to the liquefied gas regasification system according to the present invention and a ship including the same, the production period and cost can be reduced by integrally manufacturing the shell part of the heat exchanger on the ship, and the gas transfer line By opening the body of the heat exchanger to be exposed, leakage and corrosion of liquefied gas can be visually identified, thereby reducing repair costs and facilitating maintenance.

The present invention encompasses all embodiments generated by a combination of at least two or more of the above embodiments, or a combination of at least one or more of the above embodiments with known techniques, in addition to the embodiments described above.

Although the present invention has been described in detail through specific examples, this is for the purpose of describing the present invention in detail, and the present invention is not limited thereto. It will be clear that the transformation or improvement is possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

10: hull 20: seawater transport unit
30: gas transfer line 40: vaporization unit
45: cover 50: plate
60: pump 70: valve unit
80: vaporizer auxiliary unit

Claims (8)

As a ship provided with a liquefied gas regasification system,
The liquefied gas regasification system,
a vaporizer provided on the hull to vaporize liquefied gas;
a seawater transfer unit provided in the hull, for introducing seawater from the outside of the hull to the vaporization unit or for discharging seawater discharged from the vaporization unit to the outside of the hull; and
It includes a gas transfer line that moves liquefied gas inside and is connected to an external customer via the vaporization unit,
The vaporization unit,
It is provided in a sump structure for accommodating seawater, seawater is continuously supplied into the sump structure through the seawater transfer unit, and a part of the gas transfer line is submerged in seawater to exchange heat between liquefied gas and seawater,
The sump structure is
A ship, characterized in that a portion of the deck of the hull through which the gas transfer line passes is recessed and is integrally formed with the deck.
The method of claim 1,
The seawater transport unit,
a seawater inlet line for introducing seawater from the outside of the hull;
and a seawater discharge line for discharging the seawater introduced from the seawater inlet line to the outside of the hull,
The vaporization unit,
The seawater inlet line and the seawater outlet line are connected to each other, and the ship, characterized in that heat exchange with the liquefied gas through the seawater flowing from the seawater inlet line.
The method of claim 1,
The vaporization unit,
A fruit circulation line that is formed in a closed loop and circulates the fruit inside;
Ship, characterized in that it comprises a vaporizer auxiliary unit for exchanging the heat with the seawater flowing in from the seawater transfer unit.
The method of claim 1,
The vaporization unit,
Increases the heat transfer area with seawater inside A vessel comprising a plate.
The method of claim 1,
Provided on the seawater transfer unit, the ship characterized in that it further comprises a pump for introducing the seawater outside the hull to the seawater transfer unit.
The method of claim 1,
Provided on the seawater transfer unit, the vessel characterized in that it further comprises a valve for controlling the amount of seawater inflow and discharge from the seawater transfer unit according to the amount of seawater inside the vaporization unit.
The method of claim 1,
Ship, characterized in that it comprises a cover portion provided to be opened and closed in the vaporization portion so as to expose the seawater transfer portion. delete

Images