KR20180001871A - Floating marine structure with electric power generator - Google Patents

Abstract

Disclosed is a floating marine structure. The floating marine structure according to the present invention is able to switch a flowing direction of seawater to condense steam of a steam condenser by using a switching portion. Then, LNG of a regasification portion can be gasified by using seawater which is for condensing steam of the steam condenser so that usage efficiency of a facility including a seawater pipeline can be improved. The floating marine structure comprises: a hull; an LNG tank; a regasification portion; a generation portion; a seawater pipeline; and a switching portion.

Description

TECHNICAL FIELD [0001] The present invention relates to a floating structure having a power generation system,

The present invention relates to a floating structure having a power generation system capable of switching the flow direction of seawater for condensing steam of a condenser of a power generation unit.

Today, as a concern for the environment, there is growing interest in environmentally friendly power generation systems, and there is a power generation system that uses natural gas as a power generation fuel as an environmentally friendly power generation system.

However, in order to construct a power generation system using natural gas as a power source on the land, infrastructure such as a tank and a gas supply device for liquefying and storing natural gas are required. Therefore, natural gas It is difficult to construct a power generation system using the power generation system as a power generation fuel.

In order to solve the above problems, a floating system for installing a power generation system on a hull equipped with a device for storing and regenerating natural gas, generating power from the hull, Has been developed and used.

The power generation system installed on the hull has a condenser for condensing the steam generated at the time of power generation, and uses seawater to condense condensate vapor. At this time, in order to condense the vapor of the condensate with a small amount of seawater, the cold water of the regenerator is used to cool the seawater, and the condensate of the condensate is condensed by the cooled seawater.

However, in the conventional floating structure, the seawater is designed to flow from the regeneration device side to the condenser side. In this case, since the natural gas liquefied can not be vaporized by using the heated seawater discharged after condensing the vapor of the condensate, there is a disadvantage that the efficiency of use of the facility is lowered.

Prior art relating to floating floating structures is disclosed in Korean Patent Laid-Open Publication No. 10-2015-0086640 (Jul. 29, 2015).

It is an object of the present invention to provide a floating structure capable of solving all the problems of the prior art as described above.

It is another object of the present invention to provide a steam turbine which is capable of condensing condensate of condensate using seawater and vaporizing LNG of regasification portion by using heated seawater discharged after condensing condensate steam, The present invention provides a floating structure capable of improving the performance of the floating structure.

A floating type floating structure according to the present invention includes: a hull; An LNG tank installed in the hull and storing LNG (Liquefied Natural Gas); A regeneration unit installed in the hull to vaporize the LNG supplied from the LNG tank using seawater; A power generator installed in the hull and having a condenser for generating electricity by using vaporized natural gas (NG) supplied from the regeneration unit as a power generation fuel and condensing the steam generated at the power generation using seawater; A seawater conduit connected to the regeneration unit and the condenser, for supplying the seawater discharged from the regeneration unit to the condenser, or for supplying the seawater discharged from the condenser to the regeneration unit; And a switching unit installed in the sea water line for switching the flow direction of the seawater.

In the floating structure according to the present embodiment, the flow direction of the seawater for condensing the condensed steam can be switched by using the switching portion. Then, since the LNG of the regeneration unit can be vaporized by using the seawater for condensing the condensate of the condenser, the efficiency of use of facilities including the sea water pipeline can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a configuration of a floating structure according to an embodiment of the present invention; FIG.
Figs. 2A and 2B are an outline view of the main part of Fig.

It should be noted that, in the specification of the present invention, the same reference numerals as in the drawings denote the same elements, but they are numbered as much as possible even if they are shown in different drawings.

Meanwhile, the meaning of the terms described in the present specification should be understood as follows.

The word " first, "" second," and the like, used to distinguish one element from another, are to be understood to include plural representations unless the context clearly dictates otherwise. The scope of the right should not be limited by these terms.

It should be understood that the terms "comprises" or "having" does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, Means any combination of items that can be presented from more than one.

It should be understood that the term "and / or" includes all possible combinations from one or more related items. For example, the meaning of "first item, second item and / or third item" may include not only the first item, the second item or the third item but also two of the first item, Means a combination of all items that can be presented from the above.

It is to be understood that when an element is referred to as being "connected or installed" to another element, it may be directly connected or installed with the other element, although other elements may be present in between. On the other hand, when an element is referred to as being "directly connected or installed" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

Hereinafter, a floating structure according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view showing a configuration of a floating marine structure according to an embodiment of the present invention.

The floating structure according to the present embodiment may include the hull 110, the propulsion unit 120, the LNG tank 130, the regeneration unit 140, and the power generation unit 150.

The hull 110 can float on the water surface by buoyancy.

The propelling unit 120 may include a propeller and a power unit for rotating the propeller. The propeller 120 may be installed on the hull 110 to move the hull 110. The power unit may rotate the propeller while being driven by a combustion gas generated upon combustion of propellant fuel such as gas or oil.

The LNG tank 130 may be installed in the hull 110 and may store LNG (Liquefied Natural Gas). The LNG tank 130 is preferably installed below the hull 110 and the LNG stored in the LNG tank 130 is in a liquid state at approximately -160 ° C or lower.

The regeneration unit 140 may be installed in the hull 110, and may supply the LNG from the LNG tank 130 to vaporize the LNG in a gaseous state. At this time, in order to vaporize the LNG in a liquid state, the regeneration unit 140 can perform heat exchange with a relatively high temperature heat source. The regeneration unit 140 may include a tank for storing the LNG, a pump for discharging the LNG of the tank, a vaporizer for vaporizing the LNG discharged from the tank, and the like. In the regeneration unit 140, ) May have a temperature of about room temperature.

The power generation unit 150 may be installed in the hull 110 and may generate NG as the fuel vaporized in the regeneration unit 140. The power generation unit 150 will be described in detail.

The power generation section 150 may include a gas turbine 151, a waste heat recovery boiler 153, a steam turbine 155, and a condenser 157.

The gas turbine 151 can be driven by the combustion gas generated when the vaporized NG is burned and is generated while the generator 151a is driven by the gas turbine 151. [ The combustion gas driven by the gas turbine 151 is discharged to the outside of the gas turbine 151 and the exhaust gas discharged from the gas turbine 151 can be introduced into the waste heat recovery boiler 153.

The waste heat recovery boiler 153 generates steam using the exhaust gas discharged from the gas turbine 151 and the steam turbine 155 is driven by the steam discharged from the waste heat recovery boiler 153. Then, the generator 155a is driven by the steam turbine 155, and the generator 155a is generated.

The steam that drives the steam turbine 155 is discharged and condensed in the condenser 157 and discharged. The condensed water discharged from the condenser 157 can be reintroduced into the waste heat recovery boiler 153.

The floating structure according to the present embodiment burns vaporized NG and drives the gas turbine 151 using combustion gas generated during combustion of the NG that has been vaporized. The gas turbine 151 drives the generator 151a, And is developed first. The waste heat recovery boiler 153 generates steam by using the exhaust gas discharged from the gas turbine 151 and the steam turbine 155 is driven by the steam generated in the waste heat recovery boiler 153, The generator 155a is secondarily driven by the generator 155. Therefore, the power generation efficiency can be improved.

Most of the electricity generated in the power generation section 150 is supplied to the use place on the land, and the rest is used in the floating sea structure itself.

Since a large amount of condensed water is required to condense the vapor of the condensate 157, the vapor of the condensate 157 is condensed using seawater. At this time, the seawater can be cooled to condense the vapor of the condenser 157 with a small amount of seawater, and then supplied to the condenser 157. In addition, the cooling of the regeneration unit 140 may be used to cool the seawater.

In detail, the sea water pipe 161 through which seawater passes can be provided. The sea water pipeline 161 can guide the sea heat exchanged with the regeneration unit 140 to exchange heat with the condenser 157. Since the seawater in the sea water pipeline 161 is cooled by heat exchange with the regeneration unit 140, the cooled seawater flows into the condenser 157 to condense the condensate in the condenser 157. Therefore, the vapor of the condenser 157 can be condensed with a small amount of seawater.

The meaning of the heat exchange between the sea water conduit 161 and the regeneration unit 140 means that the sea water of the seawater conduit 161 exchanges heat with the LNG of the regeneration unit 140 and the heat exchange between the seawater conduit 161 and the condenser 157 Meaning that the sea water of the seawater conduit 161 and the steam of the condenser 157 are heat-exchanged.

The sea water pipeline 161 may include a first seawater channel 161a and a second seawater channel 161b.

The first seawater channel 161a may pass through the condenser 157. [ The other end of the second seawater channel 161b communicates with the first seawater pipe 161a at its one end and the regeneration unit 140 at its other end. 1 sea water duct 161a.

A part of the seawater flowing into the first end of the first seawater channel 161a flows into the regeneration unit 140 side and exchanges heat with the regeneration unit 140. The remainder is directly supplied to the condenser 157 side. At this time, the cooled seawater heat-exchanged with the regeneration unit 140 is mixed with the seawater that has not exchanged heat with the regeneration unit 140, and is able to condense the vapor of the condensate 157 while passing through the condenser 157.

A first valve 163a is provided at a portion of the first seawater pipe line 161a between one end and the other end of the second seawater pipe line 161b to adjust the degree of opening and closing of the first seawater pipe line 161a And a second valve 163b for controlling the degree of opening and closing of the second seawater channel 161b may be installed in the second seawater channel 161b. The opening degree of the first and second seawater pipes 161a and 161b can be adjusted by using the first valve 163a and the second valve 163b, Can be adjusted. If the amount of seawater exchanged with the regeneration unit 140 can be adjusted, the temperature of the seawater supplied to the condenser 157 and condensing the vapor of the condenser 157 can be adjusted. The seawater condenses the vapor of the condenser 157 can be discharged to the ocean.

When the seawater heated by heat exchange with the condenser 157 is used, the regeneration efficiency of the regeneration unit 140 can be improved.

The floating structure according to the present embodiment includes a switching unit for switching the flow direction of the seawater in the sea water pipeline 161 in order to vaporize the LNG of the regeneration unit 140 using the heated seawater by heat exchange with the condenser 157, (170) may be installed. The switching unit 170 is installed in the sea water pipeline 161 and the seawater of the sea water pipeline 161 flows toward the condenser 157 side from the regeneration unit 140 side or flows toward the regeneration unit 140 side from the condenser 157 side The flow direction of the seawater can be selectively switched to flow.

When the seawater of the seawater channel 161 flows from the condenser 157 side to the reground portion 140 side by the switching portion 170 and the heated seawater is supplied to the reground portion 140, The efficiency of the conversion can be improved.

The switching unit 170 may include a pump 171 and is preferably installed at the first sea water pipe 161a between the second seawater pipe 161b and the condenser 157. Thus, The seawater of the seawater conduit 161 flows from the regeneration unit 140 side to the condenser 157 side and when the pump 171 is rotated in the reverse direction, the seawater is discharged from the condenser 157 side to the regeneration unit 140 side 161) flows, the flow direction of the seawater can be selectively switched.

When the seawater flows from the condenser 157 side to the regeneration unit 140 side, the first valve 163a and the second valve 163b are used to connect the first seawater pipe 161a and the second seawater pipe 161b The amount of the heated seawater supplied to the regeneration unit 140 can be adjusted. The amount of LNG vaporized in the regeneration unit 140 can be adjusted if the amount of seawater supplied to the regeneration unit 140 and the heat exchange with the regeneration unit 140 can be controlled.

The floating structure according to the present embodiment is configured such that when the flow direction of the seawater in the seawater channel 161 is switched using the switching unit 170, the condensed vapor of the condenser 157 is condensed and then the heated seawater The LNG of the regeneration unit 140 can be vaporized. Then, the use efficiency of the facility including the sea water pipeline 161 can be improved.

FIG. 2A and FIG. 2B are explanatory views of the main part of FIG. 1, illustrating the flow of seawater in the seawater channel 161.

2A, the pump 171 of the switching unit 170 is rotated in the normal direction to operate in the first operation mode in which the seawater is flowed from the regeneration unit 140 side to the condenser 157 side do. The seawater introduced into the first seawater pipe line 161a may be supplied to the condenser 157 and may be supplied to the regeneration unit 140 through the second seawater pipe line 161b. The seawater of the second seawater channel 161b exchanged with the regeneration unit 140 may be mixed with the seawater of the first seawater channel 161a and supplied to the condenser 157. [ Then, since the cooled seawater is supplied to the condenser 157, the vapor of the condenser 157 can be condensed with a small amount of seawater. The seawater condenses the vapor of the condenser 157 can be discharged to the ocean.

When the LNG of the regeneration unit 140 is to be vaporized using the seawater heated by heat exchange with the condenser 157, the pump 171 of the switching unit 170 is operated in the reverse direction And operates in a second operation mode in which seawater flows from the condenser 157 side to the regeneration unit 140 side. The seawater heated by the condenser 157 flows into the first seawater pipe 161a through the first seawater pipe 161a and is discharged to the ocean through the second seawater pipe 161b, ). ≪ / RTI > Since the seawater supplied to the regeneration unit 140 is heated seawater, the LNG of the regeneration unit 140 may be vaporized in a large amount or the temperature of the vaporized NG may be relatively high. The seawater heat-exchanged with the regeneration unit 140 may be mixed with the seawater of the first seawater channel 161a and discharged to the ocean through the first seawater channel 161a.

That is, the switching unit 170 switches the first operation mode in which the seawater is supplied to the condenser 157 of the power generation unit 150 via the regeneration unit 140 and the seawater is recovered through the condensate 157 of the power generation unit 150 The second operation mode can be selectively switched to the second operation mode.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of. Therefore, the scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention.

110: Hull
120: propulsion unit
130: LNG tank
140:
150:
160:

Claims (4)

hull;
An LNG tank installed in the hull and storing LNG (Liquefied Natural Gas);
A regeneration unit installed in the hull to vaporize the LNG supplied from the LNG tank using seawater;
A power generator installed in the hull and having a condenser for generating electricity by using vaporized natural gas (NG) supplied from the regeneration unit as a power generation fuel and condensing the steam generated at the power generation using seawater;
A seawater conduit connected to the regeneration unit and the condenser, for supplying the seawater discharged from the regeneration unit to the condenser, or for supplying the seawater discharged from the condenser to the regeneration unit;
And a switching unit installed in the sea water channel for switching the flow direction of the seawater. The method according to claim 1,
Wherein the switching unit includes a pump installed in the seawater channel and switching the flow direction of the seawater while rotating in the normal and reverse directions. The method according to claim 1,
The sea water pipeline includes:
A first seawater conduit passing through the condenser;
And the second end communicates with the first seawater pipe between the one end of the first seawater pipe and the second seawater pipe between the first seawater pipe and the second seawater pipe, ,
Wherein the amount of seawater supplied to the regeneration section is adjustable. The method of claim 3,
A first valve is provided at a portion of the first seawater pipe between the one end and the other end of the second seawater pipe to regulate the degree of opening and closing of the first seawater pipe,
Wherein the second seawater channel is provided with a second valve for controlling the degree of opening and closing of the second seawater channel.

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