CN112815574A - Cold accumulation system and method for LNG (liquefied Natural gas) power container ship - Google Patents
Cold accumulation system and method for LNG (liquefied Natural gas) power container ship Download PDFInfo
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- CN112815574A CN112815574A CN202110045340.6A CN202110045340A CN112815574A CN 112815574 A CN112815574 A CN 112815574A CN 202110045340 A CN202110045340 A CN 202110045340A CN 112815574 A CN112815574 A CN 112815574A
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- 238000009825 accumulation Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000003949 liquefied natural gas Substances 0.000 title description 99
- 238000003860 storage Methods 0.000 claims abstract description 94
- 239000000446 fuel Substances 0.000 claims abstract description 35
- 238000012546 transfer Methods 0.000 claims abstract description 27
- 239000003507 refrigerant Substances 0.000 claims description 70
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 9
- 239000013505 freshwater Substances 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 239000002918 waste heat Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 241000845082 Panama Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000010759 marine diesel oil Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B17/00—Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/24—Storage receiver heat
Abstract
The invention discloses a cold accumulation system and a method for an LNG power container ship, wherein the system comprises: LNG fires uses system, LNG heat transfer system, cold-storage system. Aiming at the problems that an LNG power container ship is high in power, LNG fuel consumption is high, and a large amount of released cold energy cannot be utilized, the system stores the excessive cold energy on the LNG power container ship in a cold storage tank ice making mode, so that the problem that the cold energy of the LNG power container ship is excessive is solved.
Description
Technical Field
The invention belongs to the technical field of ships, and particularly relates to a cold accumulation system and method for an LNG (liquefied natural gas) power container ship.
Background
An LNG powered ship is a ship powered by Liquefied Natural Gas (LNG) as fuel, and in recent years, the problem of air pollution caused by marine diesel oil has become more serious, and as people pay more attention to the problem of environmental pollution, LNG is increasingly used in ships due to its advantages in safety, environmental protection, energy saving, economy, and the like, so that the number of LNG powered ships has increased, and since LNG is a low-temperature liquid of-163 ℃, it needs to be vaporized before being supplied to a main diesel engine of the LNG powered ship to reach the supply air temperature of the main diesel engine of the ship, and a large amount of cold energy is released in the process, and since the main engine power of the LNG powered container ship is large, the consumption of LNG fuel is large, and the amount of cold energy released in the process of using LNG fuel is increased. At present, the part of cold energy is proposed to be utilized in the aspects of ship air conditioners and refrigeration houses, but the application of the part of cold energy to the air conditioners and the refrigeration houses can be realized only by a small amount of cold energy, or a large amount of cold energy is not utilized, and the part of cold energy can also be used for Rankine cycle power generation.
For the problem of surplus cold energy of an LNG power container ship, Chinese patent with patent number CN110901870A provides a system and a method for utilizing LNG cold energy of a ship by a refrigerated container. Other similar patents have the problem of low utilization rate of LNG cold energy to the utilization of the LNG cold energy of the ship.
Based on the airline characteristics of LNG-powered container ships, they often travel through low latitude areas, such as the world's important, busy airlines, the marsix straits, the suez canal, the panama canal, and so on. In a low-latitude area, due to the fact that the external temperature is high, the needed cold energy is relatively large, the cold energy released by the LNG power container ship in the sailing process is large, and the LNG power container ship is not fully utilized, if the excessive cold energy released by LNG fuel in the sailing process can be stored, the cold energy is transferred to a place needing the cold energy on the land when the ship stops in the low-latitude area, the cold energy of the LNG can be fully utilized, energy conservation and emission reduction are achieved, and the LNG power container ship has a good application prospect.
Disclosure of Invention
The invention aims to solve the problems and provides a cold accumulation system and a cold accumulation method for an LNG power container ship.
A first object of the present invention is to propose a cold storage system for an LNG-powered container ship, the system comprising: LNG fires uses system, LNG heat transfer system, cold-storage system.
Wherein LNG system for burning includes: lightering pump, booster pump, control by temperature change three-way valve, LNG heat exchanger, refrigerant A temperature bulb, cylinder liner water heater.
LNG heat transfer system includes: refrigerant A circulating pump, ethylene glycol heat exchanger, refrigerant outlet joint, refrigerant inlet joint.
The cold storage system includes: refrigerant B circulating pump, solenoid valve, cold-storage case temperature package, heat transfer coil, heat preservation, cold-storage case, cold-storage incasement wall, temperature relay, coil pipe inlet joint, coil pipe outlet joint.
In the LNG burning system, a lightering pump is connected with a booster pump through a pipeline, the booster pump is connected with an LNG heat exchanger through a pipeline, a temperature control three-way valve is arranged between the booster pump and the LNG heat exchanger, and one outlet of the temperature control three-way valve is connected with the pipeline between the LNG heat exchanger and a cylinder sleeve water heater.
In the LNG heat exchange system, an LNG heat exchanger is connected with a glycol heat exchanger through a pipeline to form a circulation pipeline, a refrigerant A circulation pump and a refrigerant A bulb are arranged between the LNG heat exchanger and the glycol heat exchanger, and the refrigerant A bulb is connected with a temperature control three-way valve through a circuit.
In the cold-storage system, the cold-storage case comprises cold-storage incasement wall, heat preservation, and the heat preservation sets up between cold-storage incasement wall and cold-storage incasement wall, the cold-storage incasement is equipped with cold-storage incasement temperature bulb, temperature relay is connected with cold-storage incasement temperature bulb through the circuit, heat exchange coil installs at the cold-storage incasement, heat exchange coil has a coil pipe import joint and a coil pipe outlet joint, and coil pipe outlet joint can mutually support with the refrigerant import joint, coil pipe import joint can mutually support with the refrigerant outlet joint, and refrigerant B circulating pump is installed on the pipeline between refrigerant outlet joint and ethylene glycol heat exchanger, be equipped with the solenoid valve on the heat exchange coil pipe, the solenoid valve is connected with.
The second purpose of the invention is to provide a cold accumulation method of the LNG powered container ship based on the cold accumulation system of the LNG powered container ship.
When the ship just starts to sail, namely the system of the invention works normally, in the LNG burning system, the LNG fuel is lightered out of the cargo hold through the lightering pump, is pressurized through the booster pump, then enters the LNG heat exchanger, in the LNG heat exchange system, the refrigerant A circulates under the action of the refrigerant A circulating pump to absorb the cold energy of the LNG fuel, in the cold accumulation system, a refrigerant B circulating pump and an electromagnetic valve are opened, the refrigerant B absorbs cold energy carried by the refrigerant A, the LNG fuel after heat exchange of the LNG heat exchanger enters a cylinder sleeve water heater, and is heated and vaporized by using ship waste heat to reach the gas supply temperature of a ship main diesel engine and then is delivered to a ship main engine for combustion.
The opening degree of the temperature control three-way valve can be controlled by a refrigerant A temperature bulb, the temperature control three-way valve can control the flow of LNG fuel entering a bypass pipeline, when the load of the cold storage system is large, the opening degree of an outlet of the temperature control three-way valve connected with the bypass pipeline is reduced, the flow of the LNG fuel entering an LNG heat exchanger is increased, when the load of the cold storage system is small, the opening degree of an outlet of the temperature control three-way valve connected with the bypass pipeline is increased, the flow of the LNG fuel entering the bypass pipeline is increased, and the flow of the LNG fuel entering the LNG heat exchanger is reduced, so that the.
In addition, when the temperature sensed by the cold storage box temperature packet is less than minus 20 ℃, the electromagnetic valves are closed, and because the system is provided with a plurality of cold storage boxes for refrigeration, when the temperature sensed by the cold storage box temperature packets corresponding to all the cold storage boxes is less than minus 20 ℃, the electromagnetic valves are all closed; when the temperature sensed by the cold storage box temperature bulb is higher than minus 10 ℃, the electromagnetic valve is opened, and the temperature in the cold storage box is controlled to be minus 20 ℃ to minus 10 ℃.
When the ship is berthed in a low-latitude area, the local cold energy is more precious and the needed cold energy is relatively more because the temperature at the low latitude is higher. The coil inlet joint and the coil outlet joint have self-locking capacity, so that the coil inlet joint and the refrigerant outlet joint can be disconnected at the moment, the cold storage box is unloaded from a ship and is transported to a place needing cold energy on the land through a transport tool, then the outlet joint of heat transfer media on the land is connected with the coil inlet joint, the inlet joint of the heat transfer media is connected with the coil outlet joint, the heat transfer media are introduced into the heat exchange coil through the heat transfer media circulating pump, the cold energy in the cold storage box is released, and the cold energy is supplied to cold storages, air conditioners and other users needing cold energy on the land, and the purpose of using the LNG fuel cold energy on the ship for the land is achieved.
The invention has the advantages that:
1. the system stores the excessive cold energy on the LNG power container ship by using the ice making mode of the cold storage tank based on the characteristics of large power, high fuel consumption and excessive cold energy release of the LNG power container ship, and solves the problem of excessive cold energy.
2. The system of the invention aims at the characteristics of the ship route, realizes the application of the LNG fuel cold energy on the ship to low-latitude land, reduces the power consumption of the refrigeration equipment in the region needing the cold energy on the land, fully utilizes the LNG fuel cold energy, and realizes the maximized application of the economic benefit of the ship.
3. The system utilizes and stores the cold energy on the LNG power container ship, reduces the heat source required by vaporization before the LNG fuel is sent into the ship main engine, and saves the high-grade waste heat of the ship.
4. The system has simple structure, lower cost and easy realization, and along with the development of large-scale container ships, the LNG power container ships release more and more cold energy, and the cold energy on the ships can be supplied to low-latitude land for demand by adopting the method, so the system has good application prospect.
Drawings
FIG. 1 is a system diagram of the present invention;
fig. 2 is a structural view of a cold storage tank;
FIG. 3 is a diagram of a cold energy utilization system of the cold storage box;
in the drawings: 1. a lightering pump; 2. a booster pump; 3. a temperature control three-way valve; 4, LNG heat exchanger; 5. a refrigerant A is wrapped; 6. a refrigerant A circulating pump; 7. a glycol heat exchanger; 8. a cylinder liner water heater; 9. a refrigerant B circulating pump; 10. an electromagnetic valve; 11. a cold storage box temperature bag; 12. a heat exchange coil; 13. a heat-insulating layer; 14. a cold storage tank; 1401. the inner wall of the cold storage box; 1402. the outer wall of the cold storage box; 15. a temperature relay; 16. a coil inlet fitting; 17. a coil outlet fitting; 18. a refrigerant outlet joint; 19. refrigerant inlet connects.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples.
A cold accumulation system of an LNG power container ship is shown in figure 1 and comprises an LNG burning system, an LNG heat exchange system and a cold accumulation system.
Wherein LNG system for burning includes: the device comprises a transfer pump 1, a booster pump 2, a temperature control three-way valve 3, an LNG heat exchanger 4, a refrigerant A bulb 5 and a cylinder liner water heater 8.
LNG heat transfer system includes: refrigerant A circulating pump 6, ethylene glycol heat exchanger 7, refrigerant outlet joint 18 and refrigerant inlet joint 19.
The cold storage system includes: refrigerant B circulating pump 9, solenoid valve 10, cold storage box thermal bulb 11, heat exchange coil 12, heat preservation layer 13, cold storage box 14, cold storage box inner wall 1401, cold storage box outer wall 1402, temperature relay 15, coil pipe inlet joint 16, coil pipe outlet joint 17.
In the LNG burning system, a transfer pump 1 is connected with a booster pump 2 through a pipeline, the booster pump 2 is connected with an LNG heat exchanger 4 through a pipeline, a temperature control three-way valve 3 is arranged between the booster pump and the LNG heat exchanger 4, and one outlet of the temperature control three-way valve 3 is connected with the pipeline between the LNG heat exchanger 4 and a cylinder liner water heater 8 to form a bypass pipeline.
In the LNG heat exchange system, an LNG heat exchanger 4 is connected with an ethylene glycol heat exchanger 7 through a pipeline to form a circulation pipeline, a refrigerant A circulation pump 6 and a refrigerant A bulb 5 are arranged between the LNG heat exchanger and the ethylene glycol heat exchanger, the refrigerant A bulb 5 is connected with a temperature control three-way valve 3 through a circuit, and the opening degree of the temperature control three-way valve 3 can be controlled according to the temperature of the refrigerant A bulb 5.
In the cold accumulation system, the cold accumulation case 14 comprises cold accumulation incasement wall 1401, cold accumulation incasement wall 1402, heat preservation layer 13, and heat preservation layer 13 sets up between cold accumulation incasement wall 1401 and cold accumulation incasement wall 1402, and the size of cold accumulation case can design into standard container size, the loading and unloading of being convenient for, and fig. 2 is the cold accumulation case structure picture, and cold accumulation incasement wall 1401 has certain intensity and flexible volume, can prevent like this that 90% fresh water that holds in the cold accumulation case 14 from freezing the inflation and leading to the fact the destruction to cold accumulation case 14. Be equipped with cold-storage box temperature bulb 11 in the cold-storage box 14, temperature relay 15 is connected with cold-storage box temperature bulb 11 through the circuit, can realize coming the opening and shutting of control solenoid valve 10 according to cold-storage box temperature bulb 11's temperature, heat transfer coil 12 is installed in cold-storage box 14, heat transfer coil 12 has a coil pipe inlet joint 16 and a coil pipe outlet joint 17, and coil pipe outlet joint 17 can mutually support with refrigerant inlet joint 19, coil pipe inlet joint 16 and refrigerant outlet joint 18 can mutually support, and refrigerant B circulating pump 9 is installed on the pipeline between refrigerant outlet joint 18 and ethylene glycol heat exchanger 7, be equipped with solenoid valve 10 on the heat transfer coil 12, solenoid valve 10 is connected through the circuit with temperature relay 15.
When a ship just starts to sail, namely when the system of the invention normally works, in an LNG fuel system, LNG fuel is lightered out of a cargo hold through a lightering pump 1, is pressurized through a booster pump 2, then the LNG fuel enters an LNG heat exchanger 4, in the LNG heat exchange system, a refrigerant A circulates under the action of a refrigerant A circulating pump 6 to absorb cold energy of the LNG fuel, in a cold storage system, a refrigerant B circulating pump 9 and an electromagnetic valve 10 are opened, the refrigerant B absorbs cold energy carried by the refrigerant A and enters a heat exchange coil 12 to circulate under the action of a refrigerant B circulating pump 9, the carried cold energy is transferred to fresh water in a cold storage box 14 to reduce the temperature of the fresh water until the fresh water is frozen, the LNG fuel after heat exchange through the LNG heat exchanger 4 enters a cylinder liner water heater 8 to heat and vaporize the LNG fuel by utilizing the waste heat of the ship to reach the gas supply temperature of a main diesel engine of the ship, sending the mixture to a ship main engine for combustion.
The opening degree of the temperature control three-way valve 3 can be controlled by the refrigerant A thermometer bulb 5, the temperature control three-way valve 3 can control the flow of the LNG fuel entering the bypass pipeline, when the load of the cold storage system is large, the opening degree of an outlet of the temperature control three-way valve 3 connected with the bypass pipeline is reduced, the flow of the LNG fuel entering the LNG heat exchanger 4 is increased, when the load of the cold storage system is small, the opening degree of an outlet of the temperature control three-way valve 3 connected with the bypass pipeline is increased, the flow of the LNG fuel entering the bypass pipeline is increased, and the flow of the LNG fuel entering the LNG heat exchanger 4 is reduced, so.
In addition, when the temperature sensed by the cold storage box temperature packet 11 is less than minus 20 ℃, the electromagnetic valve 10 is closed, and because the system is provided with a plurality of cold storage boxes 14 for refrigeration, when the temperature detected by the cold storage box temperature packet 11 corresponding to all the cold storage boxes 14 is less than minus 20 ℃, the electromagnetic valve 10 is completely closed; in the navigation process, the temperature in the cold storage box 14 can be increased due to the permeable heat between the inside of the cold storage box 14 and the external environment, and when the temperature sensed by the cold storage box thermal bulb 11 is higher than minus 10 ℃, the electromagnetic valve 10 is opened to control the temperature of the cold storage box 14 to be minus 20 ℃ to minus 10 ℃.
When the ship is berthed in a low-latitude area, the local cold energy is more precious and the needed cold energy is relatively more because the temperature at the low latitude is higher. Coil pipe inlet joint 16, coil pipe outlet joint 17, refrigerant outlet joint 18, refrigerant inlet joint 19 have the auto-lock ability, and when coil pipe inlet joint 16, coil pipe outlet joint 17, refrigerant outlet joint 18, refrigerant inlet joint 19 auto-lock, intraductal liquid can not communicate with each other with the external world, avoids leading to revealing of liquid after the disconnection. At this time, the coil inlet joint 16 and the refrigerant outlet joint 18 are disconnected, the coil outlet joint 17 and the refrigerant inlet joint 19 are disconnected, the cold storage box 14 can be detached from the ship and transported to a place needing cold energy on land through a transport vehicle, the outlet joint of the heat transfer medium on land is connected with the coil inlet joint 16, the inlet joint of the heat transfer medium is connected with the coil outlet joint 17, the heat transfer medium is introduced into the heat exchange coil 12 through the heat transfer medium circulating pump, the cold energy in the cold storage box 14 is released and is used by a user needing cold energy such as a cold storage on land, an air conditioner and the like, so that the cold energy of the LNG fuel on the ship is needed by the land, and the system diagram of the cold energy is shown in fig. 3. Therefore, LNG cold energy on the LNG power container ship can be fully utilized, and the economic benefit maximization application of the ship is realized.
Note that the cold storage tank 14 shown in fig. 1 is only a schematic diagram, and does not indicate that the system of the present invention cools only one cold storage tank 14. A plurality of cold storage tanks 14 may be used in the system of the present invention for cooling.
In the actual sailing process of the LNG power container ship, the LNG power container ship is influenced by a cargo source and various factors, the container usually does not occupy all positions of a ship cargo hold, the ship cargo hold has more vacant positions, the number of cold storage tanks can be determined according to the number of the vacant positions, and therefore the influence on the loading space of the ship is small.
With the development of large-scale containers, the power of a main engine of an LNG power container ship is larger and larger, the consumption of LNG fuel is larger and larger, and therefore released cold energy is more and more, but LNG cold energy required by the ship is not obviously increased, and therefore the problem of cold energy surplus is more and more serious, and therefore the cold energy on the ship can be more supplied to users needing cold energy on low-latitude lands by adopting the method, and compared with other patents, the method has the advantage of being unique in the aspect of LNG cold energy utilization rate.
The foregoing is merely a preferred embodiment of the present invention and the specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting. It should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (7)
1. The utility model provides a cold-storage system of LNG power container ship which characterized in that: the system comprises an LNG burning system, an LNG heat exchange system and a cold accumulation system;
wherein LNG system for burning includes: the system comprises a transfer pump (1), a booster pump (2), a temperature control three-way valve (3), an LNG heat exchanger (4), a refrigerant A thermometer bulb (5) and a cylinder liner water heater (8);
LNG heat transfer system includes: a refrigerant A circulating pump (6), an ethylene glycol heat exchanger (7), a refrigerant inlet joint (19) and a refrigerant outlet joint (18);
the cold storage system includes: the device comprises a refrigerant B circulating pump (9), an electromagnetic valve (10), a cold storage box thermal bulb (11), a heat exchange coil (12), a heat preservation layer (13), a cold storage box (14), a cold storage box inner wall (1401), a cold storage box outer wall (1402), a temperature relay (15), a coil inlet joint (16) and a coil outlet joint (17);
the cold storage box 14 is composed of a cold storage box inner wall (1401), a cold storage box outer wall (1402) and a heat preservation layer (13), wherein the heat preservation layer (13) is arranged between the cold storage box inner wall (1401) and the cold storage box outer wall (1402).
2. The cold storage system of an LNG-powered container ship as claimed in claim 1, wherein: be equipped with cold-storage box temperature package (11) in cold-storage box (14), temperature relay (15) are connected with cold-storage box temperature package (11) through the circuit, install in cold-storage box (14) heat transfer coil (12), heat transfer coil (12) have one coil pipe import joint (16) and one coil pipe outlet joint (17), and coil pipe outlet joint (17) can mutually support with refrigerant import joint (19), coil pipe import joint (16) can mutually support with refrigerant outlet joint (18), and refrigerant B circulating pump (9) are installed on the pipeline between refrigerant outlet joint (18) and ethylene glycol heat exchanger (7), be equipped with solenoid valve (10) on heat transfer coil (12), solenoid valve (10) are connected through the circuit with temperature relay (15).
3. The cold storage system of an LNG-powered container ship as claimed in claim 1, wherein: the LNG heat exchanger (4) is connected with the ethylene glycol heat exchanger (7) through a pipeline to form a circulating pipeline, a refrigerant A circulating pump (6) and a refrigerant A bulb (5) are arranged between the LNG heat exchanger and the ethylene glycol heat exchanger, and the refrigerant A bulb (5) is connected with the temperature control three-way valve (3) through a circuit.
4. The cold storage system of an LNG-powered container ship as claimed in claim 1, wherein: the booster pump (2) is connected with the LNG heat exchanger (4) through a pipeline, a temperature control three-way valve (3) is arranged between the booster pump and the LNG heat exchanger, and one outlet of the temperature control three-way valve (3) is connected with the pipeline between the LNG heat exchanger (4) and the cylinder sleeve water heater (8).
5. A method of cold storage for LNG powered container ships using the system of claim 1, characterized by: when a ship just starts to sail, namely when the system of the invention normally works, in an LNG fuel system, LNG fuel is lightered out of a cargo hold through a lightering pump (1), is pressurized through a booster pump (2), then the LNG fuel enters an LNG heat exchanger (4), in the LNG heat exchange system, a refrigerant A circulates under the action of a refrigerant A circulating pump (6) to absorb cold energy of the LNG fuel, in a cold accumulation system, a refrigerant B circulating pump (9) and an electromagnetic valve (10) are opened, the refrigerant B absorbs the cold energy carried by the refrigerant A and enters a heat exchange coil (12) to circulate under the action of a refrigerant B circulating pump (9), the carried cold energy is transferred to fresh water in a cold accumulation box (14) to reduce the temperature of the fresh water until the fresh water is frozen, and in addition, the LNG fuel after heat exchange through the LNG heat exchanger (4) enters a cylinder liner water heater (8) to heat and vaporize the LNG fuel by utilizing the waste heat of the ship, the temperature of the supplied gas of the ship main diesel engine is reached, and the supplied gas is sent to the ship main engine for combustion.
6. A method of cold storage for LNG powered container ships using the system of claim 1, characterized by: when the temperature sensed by the cold storage box temperature packet (11) is less than minus 20 ℃, the electromagnetic valve (10) is closed, and because the system is provided with a plurality of cold storage boxes (14) for refrigeration, when the temperature detected by the cold storage box temperature packet (11) corresponding to all the cold storage boxes (14) is less than minus 20 ℃, the electromagnetic valve (10) is closed completely; when the temperature sensed by the cold storage box thermal bulb (11) is higher than minus 10 ℃, the electromagnetic valve (10) is opened, and the temperature of the cold storage box (14) is controlled to be minus 20 ℃ to minus 10 ℃.
7. A method of cold storage for LNG powered container ships using the system of claim 1, characterized by: when a ship stops at a low latitude with higher temperature, the coil inlet joint (16) and the refrigerant outlet joint (18) are connected, the coil outlet joint (17) and the refrigerant inlet joint (19) are disconnected, the cold storage box (14) can be detached from the ship and is transported to a user needing cold energy on the land through a transport tool, the outlet joint of heat transfer media on the land is connected with the coil inlet joint (16), the inlet joint of the heat transfer media is connected with the coil outlet joint (17), the heat transfer media are introduced into the heat exchange coil (12) through the heat transfer media circulating pump, the cold energy in the cold storage box (14) is released, and the cold storage box, the air conditioner and other users needing cold energy on the land are supplied for use.
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| CN202110045340.6A CN112815574A (en) | 2021-01-12 | 2021-01-12 | Cold accumulation system and method for LNG (liquefied Natural gas) power container ship |
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| CN202110045340.6A CN112815574A (en) | 2021-01-12 | 2021-01-12 | Cold accumulation system and method for LNG (liquefied Natural gas) power container ship |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113697083A (en) * | 2021-09-30 | 2021-11-26 | 青岛科技大学 | LNG power CO2Cargo hold heat preservation system of transport ship by using cold energy of fuel |
| CN114109659A (en) * | 2021-11-26 | 2022-03-01 | 招商局重工(深圳)有限公司 | LPG fuel pipeline control method |
| CN115158625A (en) * | 2022-07-15 | 2022-10-11 | 上海外高桥造船有限公司 | System and method for recycling cold energy of low-temperature fuel of ship and ship |
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| CN113697083A (en) * | 2021-09-30 | 2021-11-26 | 青岛科技大学 | LNG power CO2Cargo hold heat preservation system of transport ship by using cold energy of fuel |
| CN113697083B (en) * | 2021-09-30 | 2024-02-20 | 青岛科技大学 | LNG power CO 2 Cargo hold heat preservation system for transport ship by using fuel cold energy |
| CN114109659A (en) * | 2021-11-26 | 2022-03-01 | 招商局重工(深圳)有限公司 | LPG fuel pipeline control method |
| CN114109659B (en) * | 2021-11-26 | 2022-12-16 | 招商局重工(深圳)有限公司 | LPG fuel pipeline control method |
| CN115158625A (en) * | 2022-07-15 | 2022-10-11 | 上海外高桥造船有限公司 | System and method for recycling cold energy of low-temperature fuel of ship and ship |
| CN115158625B (en) * | 2022-07-15 | 2024-04-16 | 上海外高桥造船有限公司 | Ship low-temperature fuel cold energy recycling system and method and ship |
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