KR101168277B1 - Fuel chiller unit for ship - Google Patents

Abstract

Marine fuel cooler is disclosed. Marine fuel cooler for cooling the fuel used in the ship according to an embodiment of the present invention, the fuel reservoir for storing the fuel for ship; Evaporator for cooling the working fluid to cool the vessel fuel by using latent heat of evaporation of refrigerant, an absorber containing absorbent liquid absorbing refrigerant evaporated from the evaporator, and regenerating by heating the absorbed liquid of the absorber diluted through absorption of the refrigerant An absorption chiller having a regenerator and a condenser for condensing the refrigerant evaporated from the regenerator; Heat supply means for supplying heat to the regenerator of the absorption chiller so as to regenerate the absorbent liquid in the regenerator of the absorption chiller; And a heat exchanger configured to receive the ship fuel stored in the fuel reservoir and perform heat exchange between the ship fuel and the working fluid cooled in the absorption chiller, thereby cooling the ship fuel.

Description

Marine Fuel Cooler {FUEL CHILLER UNIT FOR SHIP}

The present invention relates to a fuel cooler for ships, and more particularly to a fuel cooler for increasing the viscosity of the fuel used in the ship.

The bunker oil used by most vessels is a 'remaining fuel' that remains after refining petroleum.It contains harmful substances such as lead and vanadium, emits a large amount of sulfurous acid gas, and emits nitrogen oxide gas, a source of smog. It has been pointed out as the main culprit of environmental pollution.

In recent years, with the growing interest in the environment in the international community and various international or regional regulations on environmental pollution, regulations on ship's waste gas have become increasingly strict. In particular, regulations on sulfur oxides in ship's waste gas are being tightened. For example, in accordance with recently tightened European legislation on ship's waste gas, fuels used in ships navigating near marinas or offshore, such as ship fuel, HFO (HEAVY FUEL OIL), DMC, DMB, and DMA grades The fuel stipulates that the weight ratio of sulfur should be less than 0.1% m / m. In addition, according to the California Air Pollution Regulations, in ships operating within 24 nautical miles of the California Baseline, the fuel used for the vessels has a sulfur content of 0.1% m / m. Only fuels of the following DMC, DMB and DMA grades can be used.

Therefore, in order to satisfy the above regulations, the operator must use low sulfur oil having a weight ratio of sulfur of 0.1% m / m. However, DMA grade fuels are the only fuel in the world that currently meets the 0.1% m / m low sulfur standard. In other words, in order to satisfy the regulation, the operator may say that the fuel use of the DMA is essential.

However, DMA's fuel has a low viscosity (ISO DMA grade: at least 1.5 cSt at 40 ° C), and due to the low viscosity of this fuel, pumping by the fuel pump does not occur smoothly or at the fuel injection nozzle of the engine. There is a problem that it is difficult to control the fuel injection of the correct amount of fuel. For example, in the case of MAN B & W's main engine, which is currently employed by many ships, the minimum viscosity of the fuel required by the engine is 3.0 cSt at 40 ° C.

Accordingly, in order to satisfy the viscosity of the fuel required by the main engine, it is necessary to cool the fuel to increase the viscosity. The steam compression type cooling apparatus is most commonly used as a cooling method of fuel today.

An example of such a vapor compression type cooling device is shown in FIG. 1. The vapor compression chiller 10 shown is the same as the four essential components of a conventional chiller, evaporator 14, compressor 16, condenser 18, expansion valve 19 It includes. As the refrigerant of the vapor compression type cooling device, R404a, R407c, or the like of HFC series may be used. The marine fuel introduced into the evaporator 14 through the fuel pipe 11 through which the high temperature fuel flows is cooled by directly exchanging heat with the refrigerant in the evaporator 14 and then through the fuel pipe 12. It is supplied to the outside. That is, the illustrated steam compression cooling apparatus 10 is a direct compression cooling apparatus of a vapor compression type in which direct heat exchange between the refrigerant and the ship fuel occurs in the evaporator 14.

However, such a direct cooling device, in the process of heat exchange between the fuel for ships and the refrigerant, the mixing and movement of the fluid between the refrigerant and the fuel for the ship occurs due to cracking, breakage, etc. of the refrigerant pipe or the fuel pipe for ships. The engine and other auxiliary equipment will be seriously adversely affected.

Recently, a method has been devised which does not directly heat-exchange the refrigerant and the fuel for ships. The steam compression cooling device 20 shown in FIG. 2 primarily exchanges refrigerant and fresh water in the evaporator 14, and the fresh water cooled through the heat exchanger is exchanged through the fresh water pipes 21 and 22. Let go through. The marine fuel introduced into the heat exchanger 24 through the fuel pipe 11 through which the high temperature fuel flows is cooled by heat exchange with fresh water in the heat exchanger 24 and then cooled through the fuel pipe 12. It is supplied to the outside. That is, the illustrated steam compression cooling apparatus 20 heats the refrigerant and fresh water primarily in the evaporator 14 to cool the fresh water, and heat-exchanges the cooled fresh water and marine fuel in the heat exchanger 24. It is an indirect cooling system of steam compression method.

However, even in the case of such an indirect cooling device, there is a need for a detection device for detecting leakage of a refrigerant and a maintenance system due to the use of the HFC series refrigerant. In addition, in the case of the vapor compression type cooling device, since a separate large power is required to drive the compressor 16, there is a problem in that a larger capacity generator is required.

Embodiment of the present invention is to provide a fuel cooling apparatus for a ship comprising a configuration that can increase the viscosity of the fuel used in the vessel without having a low power consumption without causing environmental pollution.

According to an aspect of the present invention, there is provided a fuel cooling device for ships for cooling the fuel used in the ship,

A fuel reservoir for storing fuel for ships; An evaporator for cooling a working fluid to cool the ship fuel by using latent heat of evaporation of a refrigerant, an absorber containing an absorbent absorbing refrigerant evaporated from the evaporator, and heating and regenerating an absorber of the absorber diluted through absorption of the refrigerant An absorption chiller having a regenerator and a condenser for condensing the refrigerant evaporated from the regenerator; Heat supply means for supplying heat to the regenerator of the absorption chiller so as to regenerate the absorbent liquid in the regenerator of the absorption chiller; And a heat exchanger configured to receive the ship fuel stored in the fuel reservoir and perform heat exchange between the ship fuel and the working fluid cooled in the absorption chiller, thereby cooling the ship fuel. Can be.

In addition, the working fluid may be water.

In addition, the refrigerant in the absorption refrigerator may be water.

In addition, the absorption liquid of the absorber absorbing the refrigerant in the absorption chiller may be a lithium bromide (LiBr) aqueous solution.

In addition, in the absorber of the absorption chiller, a cooling pipe through which seawater supplied from the sea-chest of the vessel may be installed to remove the heat of absorption generated by the absorber.

In addition, in the condenser of the absorption chiller, a cooling pipe through which the seawater passing through the absorber may be installed to condense the refrigerant evaporated from the regenerator.

In addition, the heat supply means is an auxiliary boiler (aux boiler) for heating the crude oil carried by the vessel, the steam generated in the auxiliary boiler flows to the regenerator of the absorption chiller to heat and regenerate the absorption liquid. Steam pipes can be installed.

In addition, the heat supply means is an economizer installed in the exhaust pipe of the ship to use the waste heat of the exhaust gas of the engine of the ship, the regenerator of the absorption chiller, in the economizer to heat and regenerate the absorption liquid in the regenerator Steam pipes through which the generated steam flows may be installed.

Further, according to another aspect of the present invention, as a cooling method of the fuel for ships,

A refrigerant evaporation step of evaporating the condensed refrigerant to cool a working fluid to cool the marine fuel using latent heat of evaporation of the refrigerant; A refrigerant absorbing step of absorbing the evaporated refrigerant into an absorbing liquid; An absorption liquid regeneration step of separating the refrigerant from the absorption liquid by heating the diluted absorption liquid to evaporate the refrigerant; A refrigerant condensation step of condensing the refrigerant separated in the regeneration step; And a ship fuel cooling step of cooling the ship fuel by receiving a ship fuel stored in a fuel reservoir and performing heat exchange between the ship fuel and the cooled working fluid.

According to the marine fuel cooling apparatus and the marine fuel cooling method according to the present embodiment, the viscosity of the marine fuel can be increased by cooling the marine fuel without causing environmental pollution.

In addition, since water is used as a working fluid for cooling the fuel for ships, there is no fear of mixing HFC-based refrigerant and fuel.

In addition, since water is used as a refrigerant for cooling the working fluid, it is not necessary to apply a detection device and a maintenance system for leak detection according to the use of the HFC series refrigerant.

In addition, since the compressor used in the vapor compression refrigerator is unnecessary, the required power consumption of the entire ship can be reduced.

In addition, by utilizing the waste heat from the auxiliary boiler or economizer as a heat source of the absorption chiller can increase the energy efficiency of the entire vessel.

1 is a schematic diagram of a conventional vapor compression type direct cooling device.
Figure 2 is a schematic diagram of a conventional steam compression indirect cooling apparatus.
3 is a schematic view of a marine fuel cooling apparatus according to an embodiment of the present invention.
4 is a view showing in detail the absorption chiller in the marine fuel cooling device shown in FIG.
5 is a view showing the steps of the cooling method of the ship fuel according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present embodiments are not intended to be limiting.

3 is a schematic view of a marine fuel cooling apparatus according to an embodiment of the present invention, Figure 4 is a detailed view of the absorption chiller in the marine fuel cooling apparatus shown in FIG.

Referring to FIGS. 3 and 4, the illustrated ship fuel cooling device 100 includes a fuel reservoir 102, a heat exchanger 120, an absorption chiller 200, and a heat supply means.

The fuel reservoir 102 is a place for storing the fuel for ships used in the vessel, the fuel reservoir 102 may be a fuel tank itself for storing the fuel required to drive the engine of the vessel, etc. It may be to temporarily store fuel to be cooled separately. In this embodiment, DMA-class fuel is used as fuel for driving an engine of a ship, but is not limited thereto, and HFO, DMC and DMB-class fuels and other kinds of fuels may be used.

The heat exchanger 120 receives the ship fuel stored in the fuel reservoir 102 and performs heat exchange between the supplied ship fuel and the working fluid cooled in the absorption chiller 200, thereby cooling the ship fuel to fuel It is provided to increase the viscosity. Cooling of the working fluid in the absorption chiller 200 will be described later.

The high temperature marine fuel from the fuel reservoir 102 flows into the heat exchanger 120 through the fuel inlet line 111. In addition, the working fluid cooled in the absorption chiller 200 is introduced into the heat exchanger 120 through the working fluid outlet line 122. In this case, the working fluid outflow line 122 is provided with a pump 123, by adjusting the amount of the working fluid flowing into the heat exchanger 120, the marine fuel of the cooling in the heat exchanger 120. The temperature can be adjusted.

The marine fuel cooled by heat exchange with a low temperature working fluid in the heat exchanger 120 is sent to the fuel reservoir 102 through the fuel outlet line 112. In addition, the working fluid heated by heat exchange with the high temperature marine fuel in the heat exchanger 120 is sent to the absorption chiller 200 through the working fluid inlet line 121 to be recooled. In this embodiment, although the fresh water is used as the working fluid, it is not limited thereto. Detailed description of the cooling of the working fluid will be described later.

The absorption chiller 200 is provided to cool the working fluid to cool the marine fuel, and includes an evaporator 210, an absorber 220, a regenerator 230, and a condenser 240.

The evaporator 210 is provided to cool the working fluid to cool the marine fuel by using the latent heat of evaporation of the refrigerant. In the present embodiment, fresh water is used as the refrigerant, but is not limited thereto.

On the other hand, the working fluid heat exchanger 126 in communication with the working fluid inlet line 121 and the working fluid outlet line 122 is provided in the evaporator 210. The working fluid, for example, water that passes through the working fluid inlet line 121 through the evaporator 210, is cooled by latent heat of evaporation of the refrigerant in the evaporator 210, and then the working fluid outlet line ( 122 through the heat exchanger (120).

In this case, a pump 214 is provided at the lower part of the evaporator 210 to supply the refrigerant liquid 212 stored in the lower part of the evaporator 210 to the upper part of the evaporator 210 through the refrigerant pipe 213. Done. The refrigerant supplied to the upper portion of the evaporator 210, that is, water is injected into the upper portion of the working fluid heat exchanger 126 through a nozzle in the evaporator 210 and simultaneously evaporated. Water, which is a working fluid flowing into the working fluid heat exchange part 126, is cooled by using latent heat of evaporation of the refrigerant. In this case, water as the evaporated refrigerant flows to the absorber 220 through the connection pipe 216.

The absorber 220 is provided to absorb the refrigerant evaporated from the evaporator 210, that is, water. If evaporation is continued in the evaporator 210, since the partial pressure of water vapor is gradually increased, the evaporation temperature is also increased, so that an adequate cooling effect cannot be obtained. Therefore, when the evaporated refrigerant is absorbed in the absorbent liquid 222 stored in the absorber 220, the evaporation pressure and temperature of the refrigerant in the evaporator 210 may be maintained constant. In this embodiment, an aqueous solution of lithium bromide (LiBr) is used as the absorbing liquid 222 of the absorber 220, but is not limited thereto.

Meanwhile, in order to remove the heat of absorption generated when the absorbent liquid 222 in the absorber 220 absorbs the evaporated refrigerant, the cooling pipe 136 is a heat exchanger through which a separate cooling water flows in the absorber 220. Is provided. The cooling pipe 136 is in fluid communication with the seawater inlet pipe 132 through which seawater from the sea-chest 130 of the vessel flows. In addition, a pump 133 is provided on the seawater inlet pipe 132 to adjust the amount of seawater supplied from the seawater box 130 into the absorber 220. Thanks to the low temperature seawater flowing into the cooling pipe 136, the heat of absorption due to the absorption action of the absorption liquid 222 may be removed.

In this case, when the aqueous lithium bromide solution, which is the absorbent liquid 222, continues to absorb, the aqueous lithium bromide solution gradually dilutes and cannot continue the absorbing action. Thus, a regenerator 230 is provided for regeneration of the absorbent liquid 222. The lower portion of the absorber 220 is provided with a pump 224 to supply the lithium bromide aqueous solution stored in the lower portion of the absorber 220 to the upper portion of the regenerator 230 through the absorbent liquid pipe 223.

The regenerator 230 is provided to regenerate by heating a lithium bromide aqueous solution of the absorber 220 diluted by absorbing a refrigerant, that is, water, and the absorbent liquid pipe 223 is in fluid communication with an upper portion of the regenerator 230. It is.

The heat supply means is provided to supply heat to the regenerator 230 in order to regenerate the absorbent liquid stored in the regenerator 230. As the heat supply means, in this embodiment, an auxiliary boiler 140 for heating crude oil carried by a vessel will be described as an example. The auxiliary boiler 140, as is well known, is a boiler that heats crude oil to maintain a flowable state of crude oil carried by a vessel. In this embodiment, the steam discarded from the steam generated in the auxiliary boiler 140 is supplied into the regenerator 230 through the steam inlet pipe 142. The steam inlet pipe 142 is in fluid communication with a steam pipe 146 provided as a heat exchanger in the regenerator 230.

Thus, the absorbent liquid in the regenerator 230 is heated by the high temperature steam passing through the steam pipe 146, so that the refrigerant vapor, that is, water vapor in this embodiment, is separated from the absorbent liquid while maintaining the high temperature and high pressure. The separated water vapor flows to the condenser 240 through a connecting pipe 232 connecting the regenerator 230 and the condenser 240. In addition, the low-temperature steam cooled by supplying heat to the absorbing liquid while passing through the steam pipe 146 is sent to a cascade tank 150 through the steam outlet pipe 152 and used.

Meanwhile, the lithium bromide aqueous solution, which is an absorbent liquid in which water vapor is separated from the regenerator 230, is sent back to the absorber 220 through the absorbent liquid pipe 234. In this case, an absorbent liquid heat exchanger 260 is installed between the regenerator 230 and the absorber 220, and the low-temperature diluted lithium bromide aqueous solution sent to the regenerator 230 and the absorber 220 are sent to the absorber 220. Heat exchange of a high temperature concentrated lithium bromide aqueous solution is performed. Therefore, the absorbent liquid heat exchanger 260 serves to improve thermal efficiency by significantly reducing the amount of heating in the regenerator 230 and the amount of cooling heat in the absorber 220. The aqueous lithium bromide solution passed through the absorbent liquid heat exchanger 260 is decompressed via the expansion valve 237 and then flows to the absorber 220. The concentrated aqueous lithium bromide solution introduced into the absorber 220 becomes low concentration by absorbing the refrigerant vapor again, and then enters the regenerator 230 to repeat the heating and condensing process continuously.

The condenser 240 is provided to condense the refrigerant evaporated from the regenerator 230, that is, water vapor. As shown, the condenser 240 is provided with a cooling pipe 138 as a heat exchanger for condensing evaporated refrigerant, that is, water vapor. The cooling pipe 138 is in fluid communication with the cooling pipe 136 and the connection pipe 137 installed in the absorber 220. Accordingly, the seawater passing through the absorber 220 flows into the cooling pipe 138 in the condenser 240 through the connection pipe 137. The evaporated refrigerant, ie, water vapor, in the condenser 240 is cooled and condensed by seawater flowing into the cooling pipe 138 which is a heat exchanger. The condensed refrigerant liquid, ie, water, is then resupplied to the evaporator 210 through the refrigerant pipe 244. In this case, an expansion valve 245 is provided in the refrigerant pipe 244, and the water, which is the refrigerant liquid, is supplied to the evaporator 210 under reduced pressure. The refrigerant liquid returned to the evaporator 210 is evaporated again to continue the freezing operation.

Meanwhile, seawater passing through the cooling pipe 138 of the condenser 240 flows to the seawater box 130 through the seawater discharge pipe 134 or is discharged to the outside of the ship.

Hereinafter, in the ship fuel cooling apparatus according to an embodiment of the present invention, the flow of the working fluid and the refrigerant will be described. In this case, the operation of the detailed components of the marine fuel cooling device 100 has been described above, the description thereof will be omitted.

First, the flow of the working fluid (water in this embodiment) for cooling the marine fuel will be described.

Water as a working fluid is circulated between the heat exchanger 120 and the evaporator 210 of the absorption chiller 200. The working fluid is cooled by latent heat of refrigerant in the evaporator 210, that is, water in the working fluid heat exchange part 126 provided in the evaporator 210, and the cooled working fluid is the working fluid outlet line 122. It flows through the heat exchanger 120 through. Then, the working fluid heated by receiving heat from the marine fuel in the heat exchanger 120 flows into the evaporator 210 through the working fluid inflow line 121, and is recooled in the evaporator 210. The cooling process of the cycle is completed. By repeatedly performing this cooling process, the ship fuel can be cooled to a constant temperature.

Next, the flow of the refrigerant for cooling the working fluid will be described.

The refrigerant (in this embodiment, water) cooled by the latent heat of evaporation in the evaporator 210 of the absorption chiller 200 starts to be absorbed by the aqueous lithium bromide solution, which is an absorption liquid in the absorber 220. Thereafter, the absorbent liquid whose concentration is reduced by absorbing the refrigerant is sent to the regenerator 230. In the regenerator 230, the low concentration absorbent liquid is heated by the high temperature steam flowing through the steam pipe 146 to separate the refrigerant and the absorbent liquid. The concentrated absorbent liquid separated from the refrigerant enters the absorber 220 to perform the absorption again, and the refrigerant vapor from the regenerator 230 enters the condenser 240 and is cooled and condensed by sea water to evaporate the evaporator 210. The refrigerant is then resupplied to complete a cycle of refrigerant circulation. By repeatedly performing this circulation process, the working fluid can be cooled to a constant temperature in the evaporator 210.

According to the above-described embodiment, in order to increase the viscosity of the marine fuel, the marine fuel is cooled through the cooled water, and therefore, a mixture of the marine fuel and the HFC-based refrigerant, which may occur in the conventional vapor compression type direct cooling device, is mixed. There is no concern about the possibility.

In addition, since water is used as the refrigerant, it is unnecessary to apply a detection device and a maintenance system for leak detection according to the use of the HFC refrigerant, and does not cause environmental pollution.

In addition, unlike a vapor compression cooling apparatus, since a compressor is not used, power consumption required can be reduced.

In addition, by using the steam discarded from the steam produced in the auxiliary boiler of the vessel as the heat source used in the regenerator of the absorption chiller can increase the energy efficiency of the entire vessel through the use of waste heat.

In the present embodiment, the auxiliary boiler 140 installed in the vessel as the heat supply means has been described by way of example, but is not limited thereto. For example, the heat supply means may be an economizer installed in the exhaust pipe of the ship to use waste heat of the exhaust gas from the engine of the ship, in which case the steam generated in the economizer in the regenerator 230 Of course, by flowing through the steam pipe 146, the absorbent liquid in the regenerator 230 may be heated.

Hereinafter, a method of cooling a marine fuel according to an embodiment of the present invention will be described.

5 is a view showing the steps of the cooling method of the ship fuel according to an embodiment of the present invention.

Referring to the drawings, the cooling method of the fuel for ships according to an embodiment of the present invention is refrigerant evaporation step (S1), refrigerant absorption step (S2), absorbent liquid regeneration step (S3), refrigerant condensation step (S4), and marine fuel cooling Step S5 is included.

In the refrigerant evaporation step (S1), a working fluid, for example, water, is cooled to cool a marine fuel using latent heat of evaporation of a refrigerant, for example, water.

Subsequently, in the refrigerant absorbing step (S2), the refrigerant evaporated is absorbed into an absorption liquid such as an aqueous lithium bromide (LiBr) solution.

Thereafter, in the absorbent liquid regeneration step S3, the refrigerant is separated from the absorbent liquid by heating the absorbent liquid having a low concentration diluted by absorption of the refrigerant in the refrigerant absorption step S2.

Subsequently, in the refrigerant condensation step S4, one cycle is completed by condensing the evaporated refrigerant by heating the absorption liquid in the absorption liquid regeneration step S3. The condensed refrigerant is reused to cool the working fluid in the refrigerant evaporation step (S1).

That is, by repeatedly performing the refrigerant evaporation step (S1), refrigerant absorption step (S2), absorbent liquid regeneration step (S3) and refrigerant condensation step (S4), it is possible to continuously cool the working fluid to cool the marine fuel. have.

On the other hand, the ship fuel cooling step (S5) is carried out in a separate cycle from the steps S1 to S4. In this step, the vessel fuel stored in the fuel reservoir is supplied, and the vessel fuel is cooled by heat-exchanging the vessel fuel and the working fluid cooled by latent heat of evaporation of the refrigerant in the refrigerant evaporation step (S1).

The present invention described above is not limited to the above-described embodiment and the accompanying drawings. It will be apparent to those skilled in the art that various modifications and changes can be made without departing from the technical spirit of the present invention.

Description of the Related Art
10, 20: steam compression chiller
14: Evaporator 16: Compressor
18: condenser 19: expansion valve
24: heat exchanger
100: marine fuel cooler 102: fuel reservoir
120: heat exchanger 130: sea-chest
140: Aux.Boiler 150: cascade tank
200: absorption chiller 210: evaporator
220: absorber 230: regenerator
240: condenser 260: absorbent liquid heat exchanger
123, 133, 214, 224: pump

Claims (9)

A ship fuel cooler for cooling fuel used in ships,
A fuel reservoir for storing fuel for ships;
Evaporator for cooling the working fluid to cool the vessel fuel by using latent heat of evaporation of refrigerant, an absorber containing absorbent liquid absorbing refrigerant evaporated from the evaporator, and regenerating by heating the absorbed liquid of the absorber diluted through absorption of the refrigerant An absorption chiller having a regenerator and a condenser for condensing the refrigerant evaporated from the regenerator;
Heat supply means for supplying heat to the regenerator of the absorption chiller so as to regenerate the absorbent liquid in the regenerator of the absorption chiller; And
And a heat exchanger for receiving the ship fuel stored in the fuel reservoir and performing heat exchange between the ship fuel and the working fluid cooled in the absorption chiller, thereby cooling the ship fuel. The method according to claim 1,
The working fluid is a marine fuel cooler, characterized in that the water. The method according to claim 1 or 2,
The refrigerant in the absorption chiller is a marine fuel cooler, characterized in that the water. The method according to claim 1 or 2,
The absorber of the absorber for absorbing the refrigerant in the absorption chiller is a marine fuel cooler, characterized in that the aqueous solution of lithium bromide (LiBr). The method according to claim 1 or 2,
In the absorber of the absorption chiller, a cooling pipe for passing the seawater supplied from the sea-chest of the vessel in order to remove the heat of absorption generated in the absorber is installed. The method according to claim 5,
In the condenser of the absorption chiller, a cooling pipe for passing the seawater passing through the absorber is installed in order to condense the refrigerant evaporated in the regenerator. The method according to claim 1 or 2,
The heat supply means is an auxiliary boiler for heating crude oil carried by the vessel,
The regenerator of the absorption chiller is a marine fuel cooler, characterized in that the steam pipe for flowing the steam generated in the auxiliary boiler is installed to heat and regenerate the absorption liquid. The method according to claim 1 or 2,
The heat supply means is an economizer installed in the exhaust pipe of the vessel to use waste heat of the exhaust gas of the engine of the vessel,
The regenerator of the absorption chiller is a marine fuel cooler, characterized in that the steam pipe for flowing the steam generated in the economizer is installed to heat and regenerate the absorption liquid. As a method of cooling fuel for ships,
A refrigerant evaporation step of evaporating the condensed refrigerant to cool a working fluid to cool the marine fuel using latent heat of evaporation of the refrigerant;
A refrigerant absorbing step of absorbing the evaporated refrigerant into an absorbing liquid;
An absorption liquid regeneration step of separating the refrigerant from the absorption liquid by heating the diluted absorption liquid to evaporate the refrigerant;
A refrigerant condensation step of condensing the refrigerant separated in the regeneration step; And
A marine fuel cooling method comprising: a marine fuel cooling step of cooling the marine fuel by receiving a marine fuel stored in a fuel reservoir and performing heat exchange between the marine fuel and the cooled working fluid.

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