KR20120002216A - Electric equipment arrangement in floating marine structure - Google Patents

Abstract

PURPOSE: An arrangement structure of electric equipments of a floating offshore structure is provided to improve the arrangement efficiency of facility by securing a space for various-facility installation at topside. CONSTITUTION: An arrangement structure of electric equipments of a floating offshore structure comprises a power generation and power distribution equipment(200) and integrated air conditioning equipment(600). The power generation and power distribution facility are installed in hulls of a marine construction. The integrated air conditioning equipment is installed inside the hull of the marine construction. The integrated air conditioning equipment performs air-conditioning operation about each space of the inside of the hull and a superstructure of the marine construction.

Description

Electrical equipment arrangement in floating marine structure

The present invention relates to a floating offshore structure, and more particularly to an electrical installation arrangement of a floating offshore structure.

In general, floating offshore structures include floating production production and offloading (FPSO), floating liquefied gas storage and regasification facilities (FPSOs) in the form of ships where plant equipment is installed on the hull. A vessel having a floating storage re-gasfication unit, an offshore oil-drilling platform, and the like is collectively referred to.

Oil drilling in offshore oil fields is in the form of mixtures containing gas, water, oil, and oil and therefore has no economic value. Therefore, it is necessary to process the jet oil produced in the well at the production base to have economic feasibility.

In addition, the oil produced must be stored until a certain amount, which is periodically transferred to a shuttle tanker, a tanker dedicated to the on-shore refinery.

Floating production / storage vessels should be equipped with equipment to process jet oil produced in oil wells and storage of oil produced as above. Relevant facilities for storing the produced oil and associated facilities for mooring ships are installed on the hull.

In addition, since electricity is required to drive the various facilities and devices installed in the floating production and storage vessel, a power generation system for producing and supplying electricity for driving these various facilities and devices must also be installed.

Examples of power equipment mounted on a floating structure include a topside cooling pump, an LNG cargo pump, a thruster, etc., in addition to an equalizing device, a communication device, and a positioning device. In the living quarters, electric appliances such as cooking utensils, lighting fixtures and air conditioners are also mounted. Furthermore, deck cranes, electric hatches and the like may be mounted depending on the purpose of the vessel.

Therefore, the power generation system installed in the above-mentioned floating offshore structure should provide adequate power to the various facilities and devices of the ship stably, with as little power failure as possible to protect all the facilities and devices from the power failure. The main generator, auxiliary generator, and emergency generator are generally provided because electric power must be supplied while preventing damage to equipment and devices.

Power generated from the generators is supplied to various loads (equipment) via a breaker installed corresponding to each generator and a main bus common to all generators.

Some of the loads (floats) of floating offshore structures connected to the main bus are those requiring high voltage (generally above 1 kv) and many that require low voltage (generally below 1 kv). .

Therefore, the high voltage power produced by the generator is supplied to various high voltage equipment through a high voltage switchboard, and the high voltage power is changed to a low voltage suitable for low voltage equipment through a transformer and then a low voltage switchboard ( Low voltage power is supplied from the low voltage switchboard to the low voltage installation.

Since the power generation and transmission facilities of such floating offshore structures always have the risk of providing a cause of fire by sparks, short circuits, short circuits, etc., the above-mentioned floating offshore structures are equipped with safety devices to prevent various fires. .

Moreover, floating offshore structures that drill, produce, refine, and store crude oil or gas such as LNG FPSO are marine structures that deal with explosive gases, so the risk of fire and explosion of offshore structures becomes higher due to the outflow of explosive gases. Therefore, various safety facilities should be further provided.

Therefore, existing floating marine structures handling explosive gases or materials require various additional facilities to prevent explosions, thereby increasing the manufacturing cost of floating marine structures, and installing other facilities due to various safety facilities. Space is lost, which makes it difficult to arrange various facilities.

In addition, since it is mounted on the upper side of the explosion-proof additional facility, the load of the floating offshore structure increases, so that the structure of the floating offshore structure is likely to be problematic, and the center of gravity is located on the topside. Concentration can create difficulties in the stability and balance of floating offshore structures.

Accordingly, the present invention has been invented in view of the above circumstances, and unlike the existing vessels, the arrangement of electrical-related equipment, which is a dangerous equipment mounted on the offshore structure, prevents the explosive potential of the offshore structure, and reduces the self-load of the offshore structure. It is an object of the present invention to provide a vessel capable of reducing and securing a free space for installing various facilities on the topside.

Accordingly, the present invention has been invented in view of the above circumstances, the floating offshore structure to be used while floating in the sea, power generation and distribution facilities installed inside the hull of the offshore structure; An integrated air conditioning system installed inside the hull of the marine structure so as to perform air conditioning for each space inside the upper structure and the hull of the marine structure; Characterized in that it comprises a.

 The power generation and distribution facility, the generator facility for producing power required in the offshore structure; A transformer for boosting or stepping down the power produced by the generator facility to a voltage required by the facility in the marine structure; And a power distribution facility for supplying the power up or down in the transformer facility to facilities in the marine structure.

The air conditioning system is characterized in that for supplying air for heating, ventilation or cooling to the space inside the hull in which at least one of the generator facility, the transformer facility and the power distribution facility is installed.

According to the present invention, unlike the existing vessels, the electrical installations, which are dangerous equipments mounted on the vessels, can be installed on the hull to block the possibility of exploding of marine structures in advance, and also reduce the self-load of the marine structures. It also has the effect of lowering the center of gravity of offshore structures.

In addition, it is possible to secure a free space for installing a variety of facilities on the top (topside) to increase the efficiency of the arrangement of the equipment, it is possible to increase the working environment of workers by securing a working space.

In addition, by integrating the air conditioning facilities installed in the upper structure and the hull into one and installing them on the hull, it is possible to secure additional space for the installation of various equipment in the upper structure, which is limited space, and to consume materials for the installation of additional equipment. In addition, it is possible to more efficiently optimize the arrangement of the superstructure.

1 is a schematic view of the electrical installation arrangement of the floating offshore structure according to the present invention.
2 is an enlarged schematic view of an electrical installation arrangement of a floating marine structure according to the present invention;

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the preferred embodiment of the present invention. Here, in adding reference numerals to the elements of each drawing, it should be noted that the same elements are denoted by the same reference numerals as much as possible even if they are shown in different drawings.

1 is a schematic view of the electrical installation arrangement of the floating offshore structure according to the present invention, Figure 2 is an enlarged schematic view of the electrical installation arrangement of the floating offshore structure according to the present invention.

The LNG FPSO ship, which is an embodiment to which the present invention is applied as shown in FIG. 1, is provided with a propulsion device on the opposite side of the hull portion where the deck house is located, unlike a general ship, so that the following propulsion device is installed at a rear side. (AFT, after), the hull part where the deck house, which is opposite the part where the propulsion device is installed, is called forward (FWD).

In general, the topside of the floating offshore structure (topside) has to be equipped with a large number of facilities in a limited space, generally configure a plurality of decks to mount a variety of equipment.

Among the various equipment mounted on the floating offshore structure, a generator for generating power to supply various power equipments must be mounted essentially. In general, a plurality of generators are mounted to supply stable power to various power equipments.

The power generated from the generators is supplied to various loads (equipment) via a breaker installed corresponding to each generator and a main bus common to all generators.

The main bus is normally divided by a disconnecting device, and normally, the disconnecting device is connected to the power supply in the ship, and when any part of the feeding circuit breaks, such a disconnecting device is opened to continue feeding only to a good circuit.

Among the various loads (facilities) in the floating offshore structures that are connected to the main bus line, there are some that require high voltages (generally above 1 kv) and many that require low voltages (generally below 1 kv). .

Therefore, the high voltage power produced by the generator is supplied to various high voltage facilities through a high voltage switchboard, and the high voltage power is changed to a low voltage suitable for low voltage facilities through a transformer and then to a low voltage switchboard. low voltage power is supplied from a low voltage switchboard to a low voltage installation.

Each switchboard has a built-in protection device for overcurrent, reverse power and under voltage, breakers, peripherals and transformers for breaking the main circuit. They are installed separately to provide the necessary power for each facility.

As such, the power generation and distribution facilities in the floating offshore structure contain several pieces of equipment, which require considerable space for installation, and also provide air conditioning facilities for these hazardous facilities, power generation and distribution facilities. Installation space is wasted.

Therefore, the present invention can be installed in the hull (hull) of the floating offshore structure, it is possible to efficiently arrange various facilities in the superstructure of the floating offshore structure, and to secure a passage for workers and Floating offshore structures can be created that can create free space, improve working environment, and reduce the risk of safety accidents.

In general, the owners of the floating offshore structure is to separate the hull and the superstructure separately and ordered to each shipyard, and when the hull is completed in the shipyard that received the hull, the ship is delivered to the shipyard that received the superstructure, There, after assembly with the superstructure, a trial run was conducted to the owner.

According to this practice, the shipyard that manufactures the superstructure has installed power generation and distribution facilities in the superstructure that produce power to supply the plant equipment of the superstructure. Although the superstructure of the floating offshore structure is narrow to install various equipments due to this background, the above-mentioned power generation and distribution facilities are located in the superstructure.

Accordingly, the present invention was devised in view of the fact that the power generation and distribution facilities are not in the superstructure of the floating marine structure, unlike the existing floating marine structure, the power generation and distribution facilities of the superstructure to the hull. In addition, the air conditioning equipment can also be installed in the hull by integrating one that was installed in several places in a hull can achieve various effects described in the effect section of the present invention.

Floating offshore structure is an embodiment of the present invention devised to solve the above problems is composed of a power generation and distribution facility 200, air conditioning facility 600 as shown in FIG.

The power generation and distribution facility 200 is installed on the hull of the offshore structure to produce and supply power to the power facilities in the floating offshore structure.

The power generation and distribution facilities 200 include a generator facility 300, a transformer facility 401 and 501, and a power distribution facility 410 and 510.

The generator facility 300 generates power for use in the floating offshore structure.

Power installations within the floating offshore structure typically include a forward thruster motor, an LNG cargo pump, a topside fresh water cooling pump, a rear thrust motor, a compressor, and an LPG. High voltage (generally more than 1kv) equipment such as air heater for lpg, low voltage motor, UPS (Uninterruptible Power Supply), air conditioning equipment, deck crane, lighting, electric There are facilities for low voltage (generally 1 kv or less) such as equipment (communication equipment, radar, navigation equipment, cooking equipment) and various pumps.

The high voltage and low voltage facilities are supplied with the power produced by the generator facility 300 through the main bus 310 or bus bus 320 as shown in FIG.

The transformers 401 and 501 step up or step down the power generated by the generator to a voltage suitable for the rated voltage of the various equipment as shown in FIGS. 1 and 2.

Since the power generated by the generator facility 300 is a high-voltage power, the low-voltage equipments with relatively low power consumption cannot directly use the high-voltage power, so that the appropriate voltage (for example, through the transformer facility 401) can be obtained. 230v).

1 and 2, which is an embodiment of the present invention, the power distribution facilities 400, 410, 500, and 510 include the first power distribution facilities 400 and 500 and the second power distribution facilities 410 and 510.

The first power distribution facilities 400 and 500 distribute the high voltage power produced by the generator facility 300 to the high voltage facilities in the floating offshore structure.

The second power distribution equipment (410, 510) is a floating type of the power stepped down to a voltage corresponding to the rated voltage of the various equipment through the high voltage power produced by the generator facility 300 through the transformer facilities (401, 501) Power distribution to low voltage installations in offshore structures.

1 and 2, which is an embodiment of the present invention, includes an LNG cargo pump, a front thruster motor, a topside fresh water cooling pump, and the like. The high voltage (for example, 11kv) is driven from the facilities 400 and 500, and the low voltage facilities include a low voltage motor control center (MCC), a UPS, a deck crane, lighting equipment, an elevator, and the like. It is driven by receiving a low voltage (for example, 690v) from the second power distribution facilities 410 and 510.

The air conditioning equipment is installed in the hull of the offshore structure by integrating one that is divided into a plurality of upper structures and the hull of the offshore structure into one.

At this time, since the air conditioning equipment, which is divided into a plurality of installations, is removed and integrated into one, it is necessary to design a large enough capacity of the air conditioning equipment.

The air conditioning system supplies air for heating, ventilation or cooling to a separate space inside the hull in which at least one generator, transformer, and wiring facility are installed. In addition, the air for heating, ventilation or cooling is also supplied to the uninterruptible power supply (UPS) facility that supplies uninterruptible power to an accommodation, a space where workers live, or a computerized facility for control of the floating marine structure. do.

As described above, the structure of disposing power generation and distribution facilities in the hull as described above is not limited to the above embodiments and may be variously modified or modified without departing from the technical scope of the present invention. It is obvious to those skilled in the art.

100: front hull (FWD hull) 150: rear hull (AFT hull)
200: power generation and distribution equipment 300: generator equipment
310: main bus 320: bus
400: first power distribution equipment 401: transformer
410: second power distribution equipment 500: first power distribution equipment
501: transformer facilities 510: second power distribution equipment
600: air conditioning equipment

Claims (3)

In floating offshore structures used floating at sea,
A power generation and distribution facility installed inside the hull of the marine structure;
An integrated air conditioning system installed inside the hull of the marine structure so as to perform air conditioning for each space inside the upper structure and the hull of the marine structure;
Electrical installation arrangement structure of the floating offshore structure comprising a. The method according to claim 1,
The power generation and distribution facilities,
A generator facility for producing power required in the marine structure;
A transformer for boosting or stepping down the power produced by the generator facility to a voltage required by the facility in the marine structure; And
A power distribution facility for supplying the power up or down in the transformer facility to facilities in the marine structure;
Electrical installation arrangement structure of the floating offshore structure comprising a. The method according to claim 2,
The air conditioning system is an electrical installation arrangement of a floating offshore structure, characterized in that for supplying air for heating, ventilation or cooling to the space inside the hull is installed at least one of the generator facility, the transformer unit and the power distribution facility. rescue.

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