KR20180115917A - Floating Liquefied Natural Gas plant - Google Patents

Abstract

The present invention relates to a floating production storage and offloading for liquefied gas. The present invention relates to the floating production storage and offloading for liquefied gas, manufactured by mounting a top side to a hull side by using a liquefied gas carrier as the hull side. The present invention comprises: a power generation unit for the top side provided to the top side to generate power; a power generation unit for the hull side provided to the hull side to generate the power; and a common switch board provided to the hull side to transmit the power generated from the power generation unit for the top side and the power generation unit for the hull side to a demand source for the top side.

Description

{Floating Liquefied Natural Gas plant}

The present invention relates to a liquefied gas floating production storage and unloading facility.

A ship is a means of transporting cargo by navigating the sea from the origin to the destination with various cargoes such as minerals, liquefied gas and containers. These vessels are referred to as general merchant vessels.

On the other hand, there are structures that float on the ocean but have a purpose other than cargo transportation, for example, drill ships that drill the seafloor, FPSOs that refine, store and unload crude oil floating on the sea Floating storage regasification unit (FSRU) to store and vaporize liquefied gas, and FLNG (Floating Liquefied Natural Gas Plant, LNG-FPSO) to produce, store and unload LNG. These structures are referred to as marine structures in order to distinguish them from normal marine vessels, and marine structures generally have the form of a topside, which is a facility for working on top of a substructure to float on the sea.

Recently, among various types of commercial vessels and offshore structures, ships related to natural gas are attracting attention. Natural gas is a clean fuel and its reserves are known to be richer than petroleum, and its use is rapidly increasing as mining and transfer technologies develop. This natural gas is generally stored in a liquid state at a temperature of -163 ° C below 1 atm, the main component of which is liquefied. The volume of liquefied methane is about one-sixth of the volume of the normal state gaseous methane , And the specific gravity is 0.42, which is about one-half of the specific gravity of crude oil.

On the other hand, natural gas is mainly buried in the deep sea, increasing the demand for deep sea gas field development and floating ocean structure. Therefore, the development of natural gas related technologies such as LNG carrier, LNG-FSRU and LNG-SRV, floating LNG production facility (FLNG), floating LNG regeneration facility .

For example, FLNG is a marine structure equipped with facilities for refining and liquefying natural gas extracted from the seabed located near a natural gas field where natural gas can be drilled, a liquefied gas storage tank for storing gas, Can be produced, processed and stored, and can be moved as needed.

These FLNGs are very cost effective because they can be processed directly from offshore without the need to transport natural gas from offshore to land. Therefore, as the interest in environmentally friendly fuels is increasing, customers' needs for FLNG are increasing.

However, in the case of FLNG, since a hull-shaped substructure is to be built and a top side, which is a facility for producing and liquefying natural gas, is installed at the upper part of the substructure, huge costs and materials are introduced and the drying period is very long .

However, changes in the world economy are so rapid that customer needs for FLNG can change as well during the drying period of the FLNG. In the worst case, customer contracts for FLNG are broken during the drying process, which can cause damage to shipbuilders.

As a result, shipbuilders have been conducting a lot of research and development to find ways to shorten the construction period of FLNGs in order to enable delivery of FLNG within the period that customer's needs for FLNG are maintained. However, .

In addition, FLNG has a great deal of cost and effort to construct a power system for a topside consisting of a generator, a switchboard, etc. for supplying electric power to the demand side of a top side having high electric power demand. It is the situation that continues.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the capacity and quantity of a generator for a topside generator or to eliminate the need for installing a main switchboard for a topside, The present invention is to provide a floating storage and unloading facility for liquefied gas which can reduce airflow.

It is also an object of the present invention to provide a liquefied gas floating production facility capable of easily converting from a liquefied gas carrier having a relatively low power demand to a liquefied gas floating production storage / Thereby providing a cargo handling facility.

According to an aspect of the present invention, there is provided a liquefied gas floating production storage and unloading facility, comprising a liquefied gas carrier line as a hull side and a top side mounted on the hull side, A power generator for generating power for the top side; A hull side power generator provided in the hull side to generate electric power; And a common switch board provided on the hull side to transmit the power generated from the top side power generating unit and the hull side power generating unit to a top side demand customer.

Specifically, the common switch board can transmit electric power generated from the power generator for the top side and the power generator for the hull side to the customer for hull side.

Specifically, the topside power generation section includes a plurality of top side generators, and the hull side power generation section includes a plurality of hull side generators, and the common switch board includes a plurality of topside generators And the plurality of hull side generators are synchronized with each other to transmit power to the top side demand customer.

Specifically, the common switch board is provided with a plurality of panels for a hull side including a hull side generator panel corresponding to the plurality of hull side generators and a thruster panel corresponding to the thruster, A generator panel for the top side may be installed for the spares to connect the generator for the top side.

Specifically, the generator panel for the top side may be installed in addition to the plurality of hull side panels provided on the common switch board.

Specifically, the topside generator panel may be installed in the thruster panel portion corresponding to the removed thruster, wherein the thruster is removed.

Specifically, the topside generator panel may be installed at a portion of the hull side generator panel corresponding to at least one of the removed hull side generators, at least one of which is removed from the plurality of hull side generators .

The liquefied gas floating production storage and unloading facility according to the present invention is characterized in that electric power generated from the power generating unit for the top side and the power generating unit for the hull side is supplied to the demand side for the hull side through the common switch board provided on the hull side, It is possible to reduce the capacity and the quantity of the generator for the topside, and it is not necessary to install the main switchboard for the topside, thereby reducing cost and airflow.

In addition, the floating gas production storage and unloading facility according to the present invention reduces the number of generators for the topside and does not require the installation of the main switchboard for the topside, thereby securing a space for optimum design of the machinery space can do.

Also, the liquefied gas floating production storage and unloading facility according to the present invention can easily synchronize the LNGC to the FLNG by constructing a common switch board provided in the hull side to be easily synchronized with the generator for the top side In addition, it is possible to actively cope with customer's need for FLNG during the drying period of FLNG, even if the contract destruction of FLNG occurs. Therefore, it is possible to secure competitiveness by reducing CAPEX / OPEX, Can be saved.

In addition, in order to synchronize the generator for the topside and the generator for the hullside, the liquefied gas floating production storage and unloading facility according to the present invention is provided with spare generator panels for the topside in a common switchboard provided in the hull side , It is possible to further facilitate the conversion from LNGC to FLNG.

1 is a sectional view for explaining a floating gas production floating storage facility according to embodiments of the present invention.
2 (a) and 2 (b) are block diagrams illustrating a power system of a liquefied gas floating production storage and unloading facility according to a first embodiment of the present invention.
3 (a) to 3 (c) are block diagrams illustrating a power system of a liquefied gas floating production storage and unloading facility according to a second embodiment of the present invention.
4 (a) to 4 (c) are block diagrams illustrating a power system of a liquefied gas floating production storage and unloading facility according to a third embodiment of the present invention.
5 (a) to 5 (c) are block diagrams illustrating a power system of a liquefied gas floating production storage and unloading facility according to a fourth embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

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

1 is a cross-sectional view for explaining a liquefied gas floating production storage and unloading equipment (FLNG) according to embodiments of the present invention, and is a schematic view of a first to fourth power systems (100, 200, 300, 400) may be installed.

As shown in Fig. 1, the LNGC 1 can be dried by mounting the topside 20 on the hull side 10.

The hull side 10 may be comprised of a hull 11, a liquefied gas storage tank 12 and a deck 13 and may include first to fourth power systems 120, 220, 320 and 420 for hull side, Can be installed.

The hull side 10 may be a hull side as a basic structure of the FLNG in the first embodiment to be described later and may be a lower structure of the LNGC in the second to fourth embodiments described later.

In the case of the lower structure of the LNGC, the hull side 10 may be provided with a thruster so as to be able to navigate the sea from the starting point to the destination.

A plurality of liquefied gas storage tanks 12 may be installed inside the ship 11.

The liquefied gas storage tank 12 is classified into an independent tank type and a membrane type depending on whether a heat insulating material for storing the LNG at a cryogenic temperature directly acts on the load of the cargo, Type storage tank is divided into MOSS type and IHI-SPB type, and the membrane type storage tank is divided into GT NO 96 type and TGZ Mark III type.

Although the membrane type storage tank is described as an example in the present invention, it is also applicable to an independent tank type storage tank.

A cargo handling device including any one of a pipe manifold, a cargo line, a liquid dome, a vapor dome, and a vent line may be installed on the upper portion of the deck 13 of the ship 11 .

The deck 13 may be composed of a main deck 13a, a trunk deck 13b, and a mounting deck 13c.

The main deck 13a may be formed on both sides of the trunk deck 13b.

The trunk deck 13b may be formed in the center portion of the upper surface of the hull 11 by projecting the upper middle portion of the liquefied gas storage tank 12 upward.

The mounting deck 13c is provided for securing a flat space in which the top side 20 is installed when the customer destroys the FLNG contract when the LNGC is converted into the FLNG. The mounting deck 13c horizontally extends from the upper surface of the trunk deck 13b And may be formed to be connected to the edge of the main deck 13a by being bent downward from the extended end. Of course, the mounting deck 13c may be provided so that the top side 20 can be easily installed in the FLNC.

The mounting deck 13c is a deck necessary for converting the LNGC into the FLNG as described above. However, even if the LNGC is not converted to the FLNG, the overall strength of the hull 11 of the LNGC can be improved, The generated space can be used as a passage to protect workers or crew from high digging when navigating rough seas, and also to serve as a windbreak for the polar regions.

The topside 20 can be mounted on the upper part of the hull side 10 and includes a facility for producing and liquefying natural gas as a demand source consuming a large amount of electric power and a generator of a large capacity for supplying electric power to a customer The first to fourth power systems 110, 210, 310 and 410 for the top side may be provided.

2 (a) and 2 (b) are block diagrams for explaining a power system of a floating liquefied gas production storage and unloading facility according to a first embodiment of the present invention. In order to facilitate understanding of the present embodiment, (a) shows a power system of a conventional FLNG, and FIG. 2 (b) shows a power system of an FLNG according to the present embodiment. In order to clearly understand the characteristics of the power system of the FLNG according to the present embodiment as compared with the power system of the existing FLNG,

Referring again to FIG. 1 and as shown in FIG. 2, a first power system 100 according to a first embodiment of the present invention includes a first topside power system 110, a first hull side power System 120 shown in FIG.

Hereinafter, the power system of the FLNG according to the present embodiment will be described with reference to FIG. 2 (b), and the power system of the existing FLNG shown in FIG. 2 (a) will be described as a reference only.

The first top side power system 110 can be installed in the top side 20 and includes a first top side power generation section 111, And a demand customer 113. [

The first top side power generation section 111 may be provided in the top side 20 and generate electric power to be transmitted to the first top side demand consumer 100 via the first hull side main switch board 122, It is possible not only to supply electric power to the first hull side demand customer 113 but also to supply power to the first hull side demand customer 123 to be described later.

The first top side power generation section 111 is connected to the first top side main switch board 112 provided in the top side 20 as shown in FIG. The first top side main switch board 112 is not provided in the present embodiment. This is achieved by synchronizing the first top side power generation section 111 and a first hull side power generation section 121, which will be described later, in the first hull side main switchboard 122 to be described later, Or to transmit the electric power to the first hullside demand customer 123 to be described later.

The first top side power generation section 111 may include a plurality of first top side generators 111a.

Each of the plurality of first top side generators 111a may generate a large amount of electric power and may be a gas turbine generator GTG but is not limited thereto and may generate a large amount of electric power It is of course possible to include all generating devices.

The plurality of first top side generators 111a can reduce the capacity and the number of the first top side generators 111a (for example, from four to two) as compared with the conventional FLNG, Side power generation section 111 can supply the power required by the first top-side demand site 113 in synchronization with the first hull side power generation section 121 to be described later.

The first topside demand site 113 includes at least one load that can be provided in the top side 20 and consumes the power transmitted through the first hull side main switchboard 122 to be described later . At this time, the load may mean a facility for producing and liquefying liquefied natural gas constituting the topside 20.

The first hull side power system 120 may be installed in the hull side 10 of the FLNG and may include a first hull side power generation section 121, A hullside main switch board 122, and a first hullside demand site 123. [

The first hull side power generation unit 121 may be provided in the hull side 10 and generate electric power to be supplied to a first hull side demand consumer 121 to be described later through a first hull side main switch board 122, When the demand for power is increased in the first top-side demand site 113 consuming the power supplied from the first top-side power generation section 111 as well as the first topside power generation section 111, Power can be supplied to the first top-side demand site 113 in synchronization with the first top-side power generation section 111 in the main switch board 122 for the first top side.

The first hull side power generation section 121 may include a plurality of first hull side generators 121a.

The plurality of first hull side generators 121a may be a diesel generator (DG), but the present invention is not limited thereto and may include all power generating devices for generating electric power.

The first hullside main switchboard 122 may be provided in the hull side 10 and may be configured to receive the power generated from the first top side power generation section 111 and the first hull side power generation section 121 And can transfer them to the first topside demander 113 or the first hullside demander 123 in synchronization.

Since the first hull side main switch board 122 can be used not only in the hull side 10 but also in the top side 20, it can be a common switch board.

The first hullside customer site 123 may be provided in the hull side 10 and includes at least one load that consumes the power transmitted through the first hull side main switch board 122. In this case, the load may be a motor for operating a ballast pump, an LNG offloading pump, or a power-consuming device installed in a deck house.

3 (a) to 3 (c) are block diagrams for explaining a power system of a floating liquefied gas production storage and unloading facility according to a second embodiment of the present invention. In order to facilitate understanding of the present embodiment, (a) shows a power system for a topside in a power system of a conventional FLNG, FIG. 3 (b) shows a power system of a conventional LNGC, and FIG. 3 (c) Lt; / RTI > In order to clearly understand the characteristics of the power system of the FLNG according to the present embodiment, which is manufactured by mounting a conventional LNGC as a hull side and mounting a FLNG top side on the LNGC,

Referring again to FIG. 1, and as shown in FIG. 3, a second power system 200 according to a second embodiment of the present invention includes a second topside power system 210, a second hull side power System 220 shown in FIG.

Hereinafter, the power system of the FLNG according to the present embodiment will be described with reference to FIG. 3 (c). In the power system of the existing FLNG shown in FIG. 3 (a) The power system of the LNGC shown in (c) will only be described as a reference.

The second top side power system 210 can be installed in the top side 20 and includes a second top side power generator 211, And a demand consumer 213. [

The second top side power generation section 211 and the second top side demand site 213 of the second embodiment are similar to the first top side power generation section 111 of the first embodiment and the first top side demand site 113 ) Are denoted by the same reference numerals as those of the first embodiment and the second embodiment, respectively. However, the same reference numerals are used for the same or similar components, and a detailed description thereof will be omitted herein to avoid redundancy.

However, the second topside power system 210 is not mounted on the hull side 10 of the FLNG as in the first embodiment but mounted on the hull side 10 as the lower structure of the LNGC, It will be different, and only the changes will be explained.

The second top side power generation section 211 includes a plurality of second top side generators 211a and each of the plurality of second top side generators 211a includes a second main side main switch May be connected to each of at least one or more first top side generator panels 222c installed on the board 222. [ The quantity and capacity of the second top side generator 211a can be determined in correspondence with the first top side generator panel 222c to be described later. On the contrary, it goes without saying that the number of the first top side generator panels 222c to be described later may be determined according to the quantity and capacity of the second top side generator 211a. In other words, the second top side generator 211a and the first top side generator panel 222c may vary depending on the level of the FLNG 1 to be dried.

The second top side power generation section 211 is connected to the second top side main switch board 212 via the second top side main switch board 212 provided in the top side 20 as shown in FIG. 2 to the top-side demand site 213. In this embodiment, however, the second top-side main switch board 212 is not provided. This is achieved by synchronizing the second top side power generation section 211 and the second hull side power generation section 221 in the second hull side main switchboard 222 to the second top side demand site 213 or the second hull side power generation section 221, And is configured to be able to transmit electric power to the side demand customer 223.

The plurality of second top side generators 211a may reduce the capacity and the quantity (for example, from four to two) in comparison with the existing FLNG, Side power generation section 211 can supply power appropriately required to the second top-side demand site 213 in synchronization with the second hull side power generation section 221 to be described later.

The second hullside power system 220 can be installed in the hull side 10 corresponding to the lower structure of the LNGC and as shown in Figure 3 (c), the second hull side power generating unit 221, a second hull side main switch board 222, and a second hull side demand site 223.

The second hull side power generation section 221 may be provided in the hull side 10 corresponding to the lower structure of the LNGC and generates electric power to be supplied to the second hull side power generation section 221 through the second hull side main switch board 222, When the demand for electric power is increased in the second top-side demand site 213 consuming the electric power supplied from the second top-side electricity generation section 211 as well as the second hull side demand site 223 Side power supply unit 211 in synchronism with the second top-side power generation unit 211 in the second hull side main switch board 222 to be described later.

The second hull side power generation section 221 may include a plurality of second hull side generators 221a. Each of the plurality of second hull side generators 221a may be connected to the corresponding first hull side generator panel 222a provided in the second hull side main switchboard 222 to be described later.

The plurality of second hull side generators 221a may be a diesel generator (DG), but the present invention is not limited thereto and may include all power generating devices for generating electric power.

The second hullside main switchboard 222 may be provided in the hull side 10 corresponding to the lower structure of the LNGC and the second hull side power generation unit 211 and the second hull side power generation unit 221 to the second topside demander 213 or the second hullside demander 223 by synchronizing the power generated by the second topside demander 213 or the second hullside demander 223. [

Since the second hull side main switch board 222 can be used not only in the hull side 10 but also in the top side 20, it can be a common switch board.

The second hull side main switchboard 222 may be provided with a plurality of panels for the hull side. For example, the first hull side generator panel 222a corresponding to the second hull side generator 221a And a first thruster panel 222a corresponding to a first thruster 223a to be described later.

In addition, the second hull side main switchboard 222 is provided with a second hull side generator 211a and a second hull side generator (hereinafter, referred to as " second hull side generator ") that facilitates retrofitting from the existing LNGC to the FLNG 1 of the present invention The first topside generator panel 222c may be additionally provided for a spare for connecting the second topside generator 211a for synchronization of the first topside generator 221a.

The first top side generator panel 222c may be additionally provided on the second hull side main switchboard 222. The number of the first front side power generator panels 222c may be determined depending on the level of the FLNG 1 to be dried, Can be determined in anticipation of the number of installed generators 211a. It is needless to say that the first top side generator panel 222c is additionally provided to the second hull side main switchboard 222 so that it can be installed at least as much as the installed number of the second top side generator 211a.

The second hullside demand site 223 may be provided in the hull side 10 corresponding to the substructure of the LNGC and may be provided with at least one Or more. At this time, the load is not limited to the first thruster 223a of the LNGC, the motor for operating the ballast pump, the LNG offloading pump, the refrigerator installed in the deck house, the air conditioner, Equipment, console equipment installed in a bridge, communication equipment, navigation equipment, and the like.

The first thruster 223a is connected to the first thruster panel 222a provided in the second hull side main switchboard 222 to receive power.

4 (a) to 4 (c) are block diagrams for explaining a power system of a floating liquefied gas production storage and unloading facility according to a third embodiment of the present invention. In order to facilitate understanding of the present embodiment, (a) shows a power system for a topside in a power system of a conventional FLNG, FIG. 4 (b) shows a power system of a conventional LNGC, and FIG. 4 (c) Lt; / RTI > In order to clearly understand the characteristics of the power system of the FLNG according to the present embodiment, which is manufactured by mounting a conventional LNGC as a hull side and mounting a FLNG top side on the LNGC,

Referring again to FIG. 1 and as shown in FIG. 4, a third power system 300 according to a third embodiment of the present invention includes a third topside power system 310, a third hull side power System 320 shown in FIG.

The power system of the FLNG according to the present embodiment will be described with reference to FIG. 4 (c). In the power system of the existing FLNG shown in FIG. 4 (a) The power system of the LNGC shown in (c) will only be described as a reference.

The third top side power system 310 can be installed in the top side 20 and includes a third top side power generation section 311, And a demand customer 313.

Each of the third top side power generation section 311 and the third top side demand site 313 of the third embodiment is different from the first top side power generation section 111 of the first embodiment and the first top side demand site 113 ) Are denoted by the same reference numerals as those of the first embodiment and the second embodiment, respectively. However, the same reference numerals are used for the same or similar components, and a detailed description thereof will be omitted herein to avoid redundancy.

However, the third top side power system 310 is not mounted on the hull side 10 of the FLNG as in the first embodiment but mounted on the hull side 10 as the lower structure of the LNGC, It will be different, and only the changes will be explained.

The third top side power generation section 311 includes a plurality of third top side generators 311a and each of the plurality of third top side generators 311a includes a third main side main switch And may be connected to each of at least one or more second topside generator panels 322c installed on the board 322. [ The quantity and capacity of the third top side generator 311a can be determined in correspondence with the second top side generator panel 322c to be described later. On the contrary, it goes without saying that the number of the second top side generator panels 322c to be described later may be determined according to the quantity and capacity of the third top side generator 311a. In other words, the third top side generator 311a and the second top side generator panel 322c may vary depending on the level of the FLNG 1 to be dried.

The third top side power generation section 311 is connected to the third top side main switch board 312 provided in the top side 20 as shown in FIG. Side main demand board 313, but the third top-side main switch board 312 is not provided in this embodiment. This is achieved by synchronizing the third top side power generation section 311 and the third hur side side power generation section 321 in the third hull side main switchboard 322 to the third top side demand consumer 313 or the third hull side It is configured to be able to transmit electric power to the side demand consumer 323.

The plurality of third top side generators 311a can reduce the capacity and the quantity (for example, from four to two) in comparison with the existing FLNG, Side power generation section 311 can supply power appropriately required to the third top-side demand site 313 in synchronization with the third hull side power generation section 321 to be described later.

The third hull side power system 320 can be installed in the hull side 10 corresponding to the lower structure of the LNGC and as shown in Figure 4 (c), the third hull side power generating unit 321, a third hull side main switch board 322, and a third hull side demand site 323.

The third hull side power generating unit 321 may be provided in the hull side 10 corresponding to the lower structure of the LNGC and generate electric power to be supplied to the third hull side power generating unit 321 through the third hull side main switch board 322 When the demand for electric power is increased in the third topside demand site 313 consuming the electric power supplied from the third top side electricity generation section 311 as well as being able to supply the third hull side demand site 323 Side main demand board 312 in synchronism with the third top-side power generation unit 311 in the third hull side main switchboard 322 to be described later.

The third hull side power generation section 321 may include a plurality of third hull side generators 321a. Each of the plurality of third hull side generators 321a may be connected to the second hull side generator panel 322a provided in the third hull side main switchboard 322 to be described later.

The plurality of third hull side generators 321a may be a diesel generator (DG), but it is not limited thereto and may include all power generating devices that generate electric power.

The third hull side main switchboard 322 may be provided in the hull side 10 corresponding to the lower structure of the LNGC and the third top side power generating portion 311 and the third hull side power generating portion 321 can be synchronized and transmitted to the third top side demanding party 313 or the third hull side demanding party 323.

Since the third hull side main switch board 322 can be used not only in the hull side 10 but also in the top side 20, it can be a common switch board.

The third hull side main switchboard 322 may be provided with a plurality of panels for the hull side. For example, a third hull side generator panel 422a corresponding to the third hull side generator 321a And a second thruster panel 322a corresponding to the second thruster 323a shown in FIG. 4 (b) may be basically provided, but the LNGC may be converted into the FLNG 1 of the present invention The second thruster panel 322a can be removed, as shown in FIG. 4 (c), since the second thruster 323a, which is the propulsion of the LNGC, It becomes unnecessary.

Thus, the third hullside main switchboard 322 is provided with the third topside generator 311a and the third hull side generator (first hull side) A second top side generator panel 322c may be installed for spare for connecting the third top side generator 311a for synchronization of the first top side generator 311a.

The second top side generator panel 322c may be installed at a location where the second thruster panel 322a, which is no longer needed in the third hull side main switchboard 322, is removed.

The third hullside demand site 323 may be provided in the hull side 10 corresponding to the substructure of the LNGC and may be provided with at least one Or more. At this time, the load does not include the second thruster 323a which is the propulsion of the LNGC.

5 (a) to 5 (c) are block diagrams for explaining a power system of a floating liquefied gas production storage and unloading facility according to a fourth embodiment of the present invention. In order to facilitate understanding of the present embodiment, (a) shows a power system for a topside in a power system of a conventional FLNG, FIG. 5 (b) shows a power system of a conventional LNGC, and FIG. 5 (c) Lt; / RTI > In order to clearly understand the characteristics of the power system of the FLNG according to the present embodiment, which is manufactured by mounting a conventional LNGC as a hull side and mounting a FLNG top side on the LNGC,

Referring again to Fig. 1 and as shown in Fig. 5, a fourth power system 400 according to a fourth embodiment of the present invention includes a fourth topside power system 410, a fourth hull side power System 420 shown in FIG.

Hereinafter, the power system of the FLNG according to the present embodiment will be described with reference to FIG. 5 (c), and the power system for the top side in the existing FLNG power system shown in FIG. 5 (a) The power system of the LNGC shown in (c) will only be described as a reference.

The fourth top side power system 410 may be installed in the top side 20 and may include a fourth top side power generation section 411, (413). ≪ / RTI >

Each of the fourth top side power generation section 411 and the fourth top side demand site 413 of the fourth embodiment is different from the first top side power generation section 111 of the first embodiment and the first top side demand site 113 ) Are denoted by the same reference numerals as those of the first embodiment and the second embodiment, respectively. However, the same reference numerals are used for the same or similar components, and a detailed description thereof will be omitted herein to avoid redundancy.

However, the fourth power system for tower side 410 is not mounted on the hull side 10 of the FLNG as in the first embodiment but mounted on the hull side 10 as the lower structure of the LNGC, It will be different, and only the changes will be explained.

The fourth top side power generation section 411 includes a plurality of fourth top side generators 411a. Each of the plurality of fourth top side generators 411a includes a fourth main side main switch And may be connected to each of at least one or more third top side generator panels 422c installed on the board 422. [ Accordingly, the quantity and capacity of the fourth top side generator 411a can be determined in correspondence with the third top side generator panel 422c to be described later. On the contrary, it is needless to say that the number of the third top side generator panels 422c to be described later can be determined according to the quantity and capacity of the fourth top side generator 411a. That is, the fourth top side generator 411a and the third top side generator panel 422c may vary depending on the level of the FLNG 1 to be dried.

The fourth top side power generation section 411 is connected to the fourth top side main switch board 412 provided in the top side 20 as shown in FIG. 5 (a) 4 to the top-side demand site 413, but the fourth top-side main switch board 412 is not provided in the present embodiment. This is achieved by synchronizing the fourth top side power generation section 411 and the third hull side power generation section 421 in the fourth hull side main switchboard 422 to form the fourth top side demand site 413 or the fourth hull side And to transmit power to the side demand customer 423.

The plurality of fourth top side generators 411a can reduce the capacity and the quantity (for example, from four to two) in comparison with the conventional FLNG, Side power generation section 411 can supply power appropriately required to the fourth top-side demand generation section 413 in synchronization with the fourth hull side power generation section 421 to be described later.

The fourth hull side power system 420 can be installed in the hull side 10 corresponding to the lower structure of the LNGC and as shown in Figure 5 (c), the fourth hull side power generation unit 421, a fourth hull side main switch board 422, and a fourth hull side demand site 423.

The fourth hull side power generation section 421 may be provided in the hull side 10 corresponding to the lower structure of the LNGC and generates electric power to be supplied to the fourth hull side through the fourth hull side main switch board 422 When the demand for electric power is increased in the fourth top side demand site 413 consuming the electric power supplied from the fourth top side electric power generating section 411 Side power source 413 in synchronism with the fourth top-side power generation unit 411 in the fourth hull side main switchboard 422 to be described later.

The fourth hull side power generation section 421 may include a plurality of fourth hull side generators 421a. Each of the plurality of fourth hull side generators 421a may be connected to the corresponding third hull side generator panel 422a provided in the fourth hull side main switchboard 422 to be described later.

The plurality of fourth hull side generators 421a can reduce the capacity and quantity (for example, from four to two) in comparison with existing LNGCs, The side power generation section 411 can supply power appropriately required to the fourth hull side demand section 423 in synchronism with the fourth hull side power generation section 421.

Accordingly, the plurality of fourth hull side generators 421a can be removed at least one or more to prevent power supply interruption, and the third hull side generator 421a corresponding to the removed fourth hull side generator 421a Panel 422a may also be removed. A third top side generator panel 422c to be described later, which is connected to the fourth top side generator 411a, may be installed at the removed position of the third hull side generator panel 422a.

The plurality of fourth hull side generators 421a may be a diesel generator (DG), but it is not limited thereto and may include all power generating devices that generate electric power.

The fourth hull side main switchboard 422 may be provided in the hull side 10 corresponding to the lower structure of the LNGC and the fourth top side power generating portion 411 and the fourth hull side power generating portion 421 can be synchronized and transmitted to the fourth topside-side demanding party 413 or the fourth hullside-side demanding party 423.

Since the fourth hull side main switch board 422 can be used not only in the hull side 10 but also in the top side 20, it can be a common switch board.

The fourth hull side main switchboard 422 may be provided with a plurality of panels for the hull side. For example, a third hull side generator panel 422a corresponding to the fourth hull side generator 421a And a third thruster panel 422a corresponding to a third thruster 423a to be described later.

In addition, the fourth hull side main switch board 422 is provided with the fourth top side generator 411a and the fourth hull side generator (the first hull side main switchboard 422), while facilitating retrofitting from the existing LNGC to the FLNG 1 of the present invention A third top side generator panel 422c may be installed for spare for connecting the fourth top side generator 411a for synchronization of the first top side generator 421a.

The third topside generator panel 422c may be installed at a position where at least one third hull side generator panel 422a which is not necessary in the fourth hull side main switchboard 422 is removed.

The fourth hullside demand site 423 may be provided in the hull side 10 corresponding to the substructure of the LNGC and may be provided with at least one Or more. In this case, the load is not limited to the third thruster 423a of the LNGC, the motor for operating the ballast pump, the LNG offloading pump, the refrigerator installed in the deck house, the air conditioner, Equipment, console equipment installed in a bridge, communication equipment, navigation equipment, and the like.

The third thruster 423a is connected to the third thruster panel 422a provided in the fourth hull side main switchboard 422 to receive power.

As described above, according to the present embodiment, power generated from the topside power generation units 111, 211, 311, and 411 and the hull side power generation units 121, 221, 321, and 421 is supplied to the common 213, 313, and 413 as well as the hullside demanders 123, 223, 323, and 423 through the switch boards 122, 222, 322, and 422, The capacity and the quantity of the generators 111a, 211a, 311a, and 411a can be reduced, and the main switch boards 112, 212, 312, and 412 for the topside can be omitted.

The present embodiment can reduce the number of topside generators 111a, 211a, 311a and 411a and eliminate the need for installation of the topside main switch boards 112, 212, 312 and 412, It is possible to secure a space for an optimum design of the semiconductor device.

The present embodiment can also be used to easily synchronize the common switch boards 122, 222, 322 and 422 provided in the hull side 10 with the topside generators 111a, 211a, 311a and 411a , It can be easily modified from LNGC to FLNG, and it can actively cope with LNGC even if customer's contract destruction for FLNG occurs due to change of customer's needs during FLNG drying period. Therefore, CAPEX / OPEX It is possible to secure competitiveness due to the reduction and to reduce the cost.

The present embodiment is different from the first embodiment in that the common switch boards 222, 322, and 323 provided in the hull side 10 for synchronizing the topside generators 211a, 311a, and 411a and the hull side generators 221a, 422c of the topside generator panels 222c, 322c, 422c are provided as spares, the LNGC to FLNG conversion can be further facilitated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be apparent to those skilled in the art that various combinations and modifications may be made without departing from the scope of the present invention. Therefore, it should be understood that the technical contents related to the modifications and applications that can be easily derived from the embodiments of the present invention are included in the present invention.

1: FLNG 10: Hullside
11: Hull 12: Liquefied gas storage tank
13: Deck 13a: Main deck
13b: Trunk deck 13c: Mounting deck
20: Topside
100, 200, 300, 400: first to fourth power systems
110, 210, 310, 410: power systems for first to fourth top side
111, 211, 311, 411: First to fourth top side power generation sections
111a, 211a, 311a, 411a: first to fourth top side generators
112, 212, 312, 412: first to fourth main switch boards for top side
113, 213, 313, 413: first to fourth top side demand consumers
120, 220, 320, 420: power systems for first to fourth hull sides
121, 221, 321, 421: First to fourth hull side power generation units
121a, 221a, 321a and 421a: the first to fourth hull side generators
122, 222, 322, 422: first to fourth main switch boards for hull side
222a, 322a, 422a: first to third thruster panels
222b, 322b, 422b: first to third generator panels for hull side
222c, 322c, and 422c: first to third generator-
123, 223, 323, 423: first to fourth demanders for hull side
223a, 323a, 423a: first to third thruster

Claims (7)

A liquefied gas floating production storage and unloading facility manufactured by mounting a liquefied gas carrier line on a hull side and a top side on the hull side,
A power generator for a top side provided in the top side to generate power;
A hull side power generator provided in the hull side to generate electric power; And
And a common switch board provided at the hull side for transmitting power generated from the top side power generating unit and the hull side power generating unit to a top side demand customer. The apparatus according to claim 1,
And the power generated from the generator for hull side is transmitted to the customer for hull side. The method according to claim 1,
Wherein the top side power generation section includes a plurality of top side power generators,
The hull side power generation section includes a plurality of hull side generators,
Wherein the common switch board synchronizes the plurality of topside generators with the plurality of hull side generators to transmit electric power to the top side demand customer. The apparatus according to claim 3,
A plurality of panels for a hull side including a generator panel for a hull side corresponding to the plurality of hull side generators and a thruster panel corresponding to a thruster,
And a topside generator panel for a spare for connecting the generator for the topside is installed. 5. The topside generator panel according to claim 4,
Wherein the common switch board is installed in addition to the plurality of panels for the hull side provided in the common switch board. 5. The topside generator panel according to claim 4,
Wherein the thruster is removed and installed in a portion of the thruster panel corresponding to the removed thruster. 5. The topside generator panel according to claim 4,
Wherein at least one of the plurality of hull side generators is removed and installed in a portion of the hull side generator panel corresponding to the removed at least one generator for hull side.

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