KR20140145772A

KR20140145772A - Central fresh water cooling system for ship

Info

Publication number: KR20140145772A
Application number: KR20130068328A
Authority: KR
Inventors: 김영식
Original assignee: 현대중공업 주식회사
Priority date: 2013-06-14
Filing date: 2013-06-14
Publication date: 2014-12-24

Abstract

The present invention relates to a central fresh water cooling system for a ship. The purpose of the present invention is to prevent seawater in a central cooler from being automatically exhausted to the outside even if a seawater supply pump is stopped by connecting the cooler and a seawater exhaust line through a reverse U-shaped pipe, thereby preventing a vacuum phenomenon in the central cooler. Fresh water is circulated and supplied to a heating device in a ship, and is cooled through a heat-exchange with seawater in the central cooler. The seawater is exhausted to the outside through the seawater exhaust line connected to the central cooler. The central cooler and the seawater exhaust line are connected to each other through the reverse U-shaped pipe located on the central cooler to prevent seawater in the central cooler from being automatically exhausted to the seawater exhaust line through the reverse U-shaped pipe when the seawater supply pump is stopped.

Description

[0001] The present invention relates to a central fresh water cooling system for ship,

The present invention relates to a central fresh water cooling system for ships, in which sea water in the central cooler is not automatically discharged to the seawater discharge line by connecting the central cooler and the seawater discharge lines to each other by the ∩ ' To a central clean water cooling system for a ship.

In general, the cooling water system of a ship cools engine, generator, motor, air consystem, air compressor and other heat generating heat generating equipment, Cooling equipment is cooled with cooling water, and cooling water is cooled using seawater.

Pump cooling system and scoop cooling system are applied to cool the heating equipment. And dozens of types such as air cooler, lubricant cooler or clean water cooler are applied to the ship as pump cooling system. Has been used. In particular, the fresh water cooler is a type of machinery cooling system of a ship, and a method of circulating fresh water for cooling the machinery is used.

In the conventional ship cooling system, fresh water is circulated through the fresh water circulating line to the heating device by pumping the fresh water circulating pump to cool the heat generating equipment such as the main engine, the generator engine, In this process, the fresh water whose temperature rises is cooled by the sea coolant and heat exchange in the central cooler. By cooling the fresh water, the seawater whose temperature has risen is stored in the ballast tank or is thrown directly to the sea through the seawater discharge line. When the limiting draft is reached, the seawater in the ballast tanks is re-supplied to the central cooler.

However, in the case of a central fresh water cooling system for a ship, when the overboard line connected to the central cooler is located at about 20M below the heat exchanger, if an abnormality occurs in the sea water pump, There is a problem that a vacuum is formed in the center cooler by being automatically discharged to the outside of the ship through the discharge line. That is, if the seawater supply pump is operated again in a state where a vacuum phenomenon occurs in the central cooler, a hammer phenomenon occurs in the seawater supply line, the central cooler, and the seawater discharge line, There were various problems.

Open Patent Publication No. 10-2012-0133852 (2012.12.11)

The object of the present invention is to provide a method of connecting a cooler and a seawater discharge line by a '∩' -shaped bending pipe to prevent the automatic discharge of seawater in the center cooler even when the seawater pump is stopped, And a fresh water cooling system.

In the present invention, fresh water is circulated and supplied through a heating device in a ship, and the fresh water is cooled by heat exchange with seawater in a central cooler, and the seawater is cooled by a central fresh water cooling A system comprising:

The center cooler and the seawater discharge line are connected to each other by a bent ∩ shaped bent pipe positioned above the center cooler. When the seawater supply pump is stopped, seawater in the central cooler is discharged through the ∩ ' It can not be moved automatically to the line.

As described above, according to the present invention, since the central cooler and the sea water discharge line are connected by the ∩ 'type bent pipe, even if seawater in the seawater discharge line is automatically discharged to the outside by stopping the sea water supply pump, The pipe does not move the seawater in the central cooler to the seawater discharge line, so that the vacuum phenomenon due to the discharge of seawater in the central cooler is not generated.

Further, the present invention is further provided with a unidirectional valve through which the external air can flow into the ∩ 'shaped bending pipe, so that even if the seawater in the central cooler is moved to the seawater discharge line through the ∩' shaped bending pipe, Air is introduced into the central cooler of the valve, thereby preventing the vacuum phenomenon in the central cooler.

1 is an illustration showing a configuration according to the present invention;
FIG. 2 is an exemplary view showing a fresh water cooling system for a ship

FIG. 1 is an exemplary view showing a configuration according to the present invention, FIG. 2 is an exemplary view showing a fresh water cooling system for a ship,

The central fresh water cooling system for ships is roughly divided into expansion tank → main cooling FW pump → main engine (M / E), generator (G / E), compressor compressor and a variety of coolers to a central cooler (FWcooler).

That is, the central cooling water cooling system for marine cooling all the heat generating equipment (F / W) such as main engine (M / E), generator (G / E), compressor, And cool the fresh water (FW) from the central cooler to the seawater (SW).

At this time, the seawater is supplied from the sea chest of the ship to the central cooler through the sea water supply line by the transfer force of the seawater supply pump, exchanges heat with the fresh water, and then discharged through the seawater discharge line to the ballast tank or the outside of the hull do.

Hereinafter, in the description according to the present invention, reference numeral 61 denotes the flow of seawater and reference numeral 51 denotes the flow of fresh water.

As described above, according to the present invention, fresh water is circulated and supplied to the in-vessel heating device 10, and the fresh water is cooled by heat exchange with seawater in a central cooler 20, and the seawater is connected to the central cooler 20 A central fresh water cooling system (100) for a ship, which is discharged to the outside through a sea water discharge line (30);

The central cooler 20 and the seawater discharge line 30 are connected to each other by a curved bent ∩ shaped pipe 40 positioned above the center cooler 20 so that the seawater in the central cooler 20 is' Shaped bending pipe 40 to the seawater discharge line 30. [0050]

The central cooler 20 cools the fresh water by exchanging fresh water with seawater. The central cooler 20 is installed to be located on the fresh water circulating line 50, the seawater supply line 60 is connected to the lower one side, Shaped bent pipe 40 connected to the seawater discharge line 30 is connected to the installed discharge pipe 21.

The seawater discharge line 30 is supplied to the central cooler 20 through the seawater supply line 60 by the seawater supply pump 70 and the seawater whose temperature is raised by the heat exchange with the fresh water is supplied to the ballast tank 80 or And is discharged to the outside of the hull 90. In the central clean water cooling system 100 to which the present invention is applied, it is installed about 20 m below the center cooler 20.

Shaped bent pipe 40 connects the central cooler 20 and the seawater discharge line 30. When the seawater supply pump 70 stops, the seawater in the center cooler 20 flows into the seawater discharge line 30 A first pipe 41 connected to the discharge pipe 21 of the central cooler 20; a second pipe 42 connected to the seawater discharge line 30; And a third pipe 43 having one side connected to the first pipe 41 and the other side connected to the second pipe 42. The third pipe 43 is connected to the discharge pipe of the central cooler 20 21).

The first pipe 41 and the third pipe 43, the third pipe 43 and the second pipe 42, and the second pipe 41, the second pipe 43 and the second pipe 42 of the central cooler 20, The pipe 42 and the seawater discharge line 30 are connected to each other by flanges or the first, second and third pipes 41, 42 and 43 are integrated into a single unit, and the discharge pipe 21 of the central cooler 20, (30).

The first pipe 41 is installed vertically in the upper direction of the central cooler in the discharge pipe 21 and the third pipe 43 is connected to the first pipe 41 in a ' And the second pipe 42 is installed so that one end of the third pipe 43 and the sea water discharge line 30 are connected to each other so that the first, second and third pipes 41, Shaped "?'Shape.

In the present invention configured as described above, the seawater in the seawater discharge line 30 is automatically discharged to the outside of the ship when the seawater supply pump 70 is stopped by an abnormal occurrence of the seawater supply pump 70, Is not transferred to the seawater discharge line (30) by the '∩' type bent pipe (40), so that the vacuum phenomenon due to the discharge of seawater in the center cooler (20) is not generated. That is, with reference to the upper end 44 of the '∩' -shaped bent pipe 40, the seawater in the pipe (part of the ∩ 'shaped bent pipe and the seawater discharge line) from the upper end portion 44 toward the seawater discharge line 30 But the seawater discharged from the discharge pipe 21 of the central cooler 20 to the upper end portion 44 (part of the ∩ 'shaped bending pipe and discharge pipe of the central cooler) is not discharged.

The upper end portion 44 refers to the lower point of the pipe located at the uppermost position in the ∩ 'type bent pipe 40.

Further, the present invention is characterized in that a unidirectional valve 45 is further provided on one side of the '∩' -shaped bending pipe 40, preferably the third pipe 43 to allow inflow of outside air, When the seawater in the piping (part of the ∩ '-shaped bending pipe and the seawater discharge line) from the upper end toward the seawater discharge line is discharged to the discharged seawater by the discharge pressure by the car, External air is introduced to prevent the formation of vacuum in the central cooler 20, the ∩ 'shaped bending pipe 40 and the seawater discharge line 30. [ Since the unidirectional valve is a known valve such as a check valve in which air is supplied in one direction and the fluid in the pipe is not discharged, the description thereof will be omitted.

In addition, a plurality of various valves are installed in the fresh water circulation line, the seawater supply line, and the seawater discharge line of the present invention, and these valves are well-known valves, and a description thereof will be omitted.

Reference numeral 200 denotes a panel deck, and 300 denotes a deck or a bracket.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(10): Heating Equipment (20): Central Cooler
(30): Seawater discharge line (40): '∩' type bent pipe
(41): first pipe (42): second pipe
(43): third pipe (44): upper end
(45): one-way valve (50): fresh water circulation line
(60): Seawater supply line (70): Seawater supply pump
(80): Ballast tank (90): Outside the hull
(100): Central fresh water cooling system for ships

Claims

A central clean water cooling system for a ship, in which fresh water is circulated and cooled by a heating device in a ship, the fresh water is cooled by heat exchange with sea water in a central cooler, and the sea water is discharged to the outside through a sea water discharge line connected to a central cooler ;
The center cooler and the seawater discharge line are connected to each other by a bent ∩ shaped bent pipe positioned above the center cooler. When the seawater supply pump is stopped, seawater in the central cooler is discharged through the ∩ ' Line to the outside of the ship.

The method of claim 1,
The '∩' type bending pipe includes a first pipe connected to the discharge pipe of the central cooler, a second pipe connected to the seawater discharge line, and a second pipe connected to one end of the first pipe, 3 pipe, wherein the third pipe is disposed above the discharge pipe of the central cooler.

The method of claim 2,
The discharge pipe and the first pipe, the first pipe and the third pipe, the third pipe and the second pipe, the second pipe and the seawater discharge line of the central cooler are flange-
Wherein the first, second, and third pipes are integrated into one and connected to the discharge pipe of the central cooler and the sea water discharge line by flange connection.