CN113697083B - LNG power CO 2 Cargo hold heat preservation system for transport ship by using fuel cold energy - Google Patents
LNG power CO 2 Cargo hold heat preservation system for transport ship by using fuel cold energy Download PDFInfo
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- CN113697083B CN113697083B CN202111162451.1A CN202111162451A CN113697083B CN 113697083 B CN113697083 B CN 113697083B CN 202111162451 A CN202111162451 A CN 202111162451A CN 113697083 B CN113697083 B CN 113697083B
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- storage tank
- refrigerant
- lng
- heat exchanger
- temperature
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- 239000000446 fuel Substances 0.000 title claims abstract description 38
- 238000004321 preservation Methods 0.000 title claims abstract description 5
- 239000003507 refrigerant Substances 0.000 claims abstract description 75
- 238000005057 refrigeration Methods 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 239000002918 waste heat Substances 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 206
- 229910002092 carbon dioxide Inorganic materials 0.000 description 103
- 239000001569 carbon dioxide Substances 0.000 description 103
- 239000003949 liquefied natural gas Substances 0.000 description 43
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/12—Heating; Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
Abstract
The invention provides LNG power CO 2 Cargo hold heat preservation system for transport ship by utilizing fuel cold energy, the system comprises LNG storage tank, lightering pump, booster pump, refrigerant heat exchanger, cylinder liner water heater and CO 2 Heat exchanger, refrigerant circulating pump and CO 2 Storage tank, refrigerant temperature package, temperature relay, use in the semi-cold half-pressure CO with LNG as power 2 On the transport vessel. The system of the invention utilizes the cold energy released in the use process of LNG fuel as CO 2 CO of transport ship 2 Storage tank refrigeration, CO is avoided 2 BOG generation in the storage tank, and the ship does not need to additionally set new CO 2 The storage tank refrigeration equipment can save a large amount of ship electric energy and input cost, improves the economy of the ship, can also effectively save the host cylinder liner water containing high-quality waste heat, and improves the energy utilization rate of the whole ship. Therefore, the invention has good application prospect under the current background of energy conservation and emission reduction of ships.
Description
Technical Field
The invention belongs to the technical field of ships, and particularly relates to LNG power CO 2 Cargo hold insulation systems for transport vessels utilize fuel cooling energy.
Background
Global warming is one of the environmental problems of close concern to the current international society. In recent years, carbon dioxide (CO) 2 ) The increasing gas emission, carbon emission reduction, sealing and transportation technologies are receiving wide attention from the marine industry. The international maritime organization has set higher requirements on carbon emission, and China has set a ' peak of 2030 carbon and a ' ambitious goal of 2060 carbon neutralization '. Under the background of increasingly severe carbon emission at home and abroad, how to reduce CO 2 Has become urgent in dischargeThe difficult problem to be solved.
To reduce CO on a large scale 2 Is discharged to CO 2 Collecting, utilizing or storing. Currently, commonly used CO 2 The storage method mainly comprises the steps of ore carbonization, seawater carbon fixation, mine sealing and storage and the like. For example, icelanda has a storage capacity of 2.5 trillion tons of CO 2 Global CO over 55 years 2 Discharge amount. However, whatever the storage mode, the CO is required to be 2 Offshore transfer and transportation, CO 2 Transport ship is the transport of CO 2 Is one of the important means of (a).
To increase CO 2 Is the transport amount of CO 2 Transport is usually carried out in liquid form using tanks, CO 2 The storage tank of the transport ship is provided with full-cooling type, full-pressure type and half-cooling and half-pressure type. Full-cooling and full-pressure tanks suffer from major drawbacks: full pressure CO adopting high pressure mode 2 Liquefying, the pressure requirement on the storage tank is high; the full cooling type needs to reduce the temperature in the storage tank to about-79 ℃ and needs refrigeration equipment with high cost and a thicker storage tank heat-insulating layer. Semi-cold semi-pressure CO 2 The pressure in the storage tank is between 1.0MPa and 1.5MPa, the temperature is maintained between-36.61 ℃ and-25.74 ℃, the required storage tank temperature and pressure requirements are relatively low, the economical efficiency is better, and the transportation mode is more ideal. However, a certain temperature difference still exists between the storage tank and the external environment, so that more infiltration heat is generated in the storage tank, and liquid CO in the storage tank is unavoidable 2 BOG is generated, and therefore, the ship needs to be provided with refrigeration equipment, but the refrigeration equipment needs to be powered by a ship power system, and can consume a great deal of ship electric energy.
The natural gas is clean and environment-friendly high-quality energy, has abundant global reserves, and can avoid SO when being used as marine energy compared with fossil fuels such as petroleum and the like x Can also greatly reduce NO x And CO 2 As a result, current and future LNG powered vessels will be more and more. Furthermore, because natural gas has a small density, natural gas is often liquefied and stored in a storage tank in order to satisfy the fuel carrying amount and further reduce the storage space. LNG (liquefied natural gas) is a cryogenic liquid at-163 DEG CWhen the fuel is used as fuel, the fuel needs to be gasified by absorbing heat and heated to 20-45 ℃ for use, and a large amount of cold energy can be released in the process.
Based on this, if an LNG power CO can be provided 2 Cargo hold heat preservation system utilizing fuel cold energy of transport ship and cold energy utilizing LNG fuel as CO 2 CO of transport ship 2 The storage tank is refrigerated to keep the relative low temperature, thereby avoiding CO 2 The BOG in the storage tank can greatly reduce the consumption of the ship electric energy, and has high practical significance.
Disclosure of Invention
The invention aims to solve the problems and provide an LNG power CO 2 Cargo hold insulation systems for transport vessels utilize fuel cooling energy. The system comprises an LNG fuel supply system and CO 2 A storage tank refrigeration system.
Wherein, the LNG fuel supply system includes: LNG storage tank, transfer pump, booster pump, refrigerant heat exchanger, cylinder liner water heater.
The CO 2 The storage tank refrigeration system includes: refrigerant heat exchanger, CO 2 Heat exchanger, refrigerant circulating pump and CO 2 Storage tank, refrigerant temperature package, temperature relay.
In the LNG fuel supply system, be equipped with the transfer pump in the LNG storage tank, the transfer pump passes through pipe connection with the booster pump, the booster pump passes through pipe connection with the refrigerant heat exchanger, cylinder liner water heater passes through pipe connection with the refrigerant heat exchanger, and final pipeline leads to the boats and ships host computer.
In CO 2 In the storage tank refrigerating system, the refrigerant heat exchanger and CO 2 The heat exchangers are connected through pipelines, and CO 2 The heat exchanger is connected with the refrigerant circulating pump through a pipeline, and CO 2 The heat exchanger is arranged at CO 2 In the storage tank, the refrigerant temperature package is arranged on the refrigerant passing through CO 2 And the temperature relay is electrically connected with the refrigerant temperature bulb and the refrigerant circulating pump on the main pipeline after heat exchange of the heat exchanger.
When the ship sails, in the LNG fuel supply system, fuel in the LNG storage tank is output to the booster pump through the transfer pump for boosting, the boosted LNG fuel enters the refrigerant heat exchanger for heat exchange, and finally the LNG fuel is gasified through the cylinder sleeve water heater and is conveyed to the ship host machine for combustion after reaching the temperature requirement.
In CO 2 In the storage tank refrigerating system, the refrigerant absorbs cold energy contained in LNG fuel in a refrigerant heat exchanger, and the refrigerant is in CO under the action of a refrigerant circulating pump 2 The storage tank refrigerating system circulates, and the refrigerant carries cold energy to enter CO 2 CO in a storage tank 2 Heat exchanger for transferring cold energy to liquid CO 2 Is CO 2 And (5) refrigerating the storage tank.
The CO 2 A control system is arranged in the storage tank refrigerating system, and the refrigerant passes through CO 2 The heat exchanger is CO 2 The storage tank transmits cold energy, a main pipeline after the refrigerants meet is provided with a refrigerant temperature package, the refrigerant temperature package transmits collected temperature information to the temperature relay, and when the temperature relay detects the secondary CO 2 When the temperature of the refrigerant coming out of the storage tank reaches a set lower limit value (set by people), the refrigerant circulating pump stops working, and CO 2 Stopping the storage tank refrigerating system; when the temperature is higher than the set upper limit value (set by human), CO 2 The refrigerating system of the storage tank restarts to work so as to realize the utilization of LNG cold energy to CO 2 CO on transport vessel 2 The storage tank keeps warm, avoids BOG's production.
Further, to increase CO 2 Convective heat exchange effect in storage tank, and CO (carbon monoxide) in forward floating of ship 2 When the filling rate of the storage tank is 95%, CO 2 The heat exchanger is installed at a position 1m below the free liquid level in the storage tank.
The invention has the beneficial effects that:
1. the system is applied to semi-cold and semi-pressure CO taking LNG as power 2 On the transport ship, cold energy released in the using process of LNG fuel is ingeniously utilized as CO 2 Storage tank refrigeration, and ship does not need to be additionally provided with CO 2 Storage tank refrigeration equipment, and the invention can avoid CO 2 BOG is generated in the cargo hold, so that the consumption of ship electric energy is reduced, and the method has good economy.
2. The system of the invention firstly utilizes CO 2 The energy in the storage tank heats LNG fuel, and then the cylinder sleeve is adopted to heat water for heatingThe engine cylinder liner water reaches the air inlet temperature of the engine, thereby effectively saving the engine cylinder liner water containing high-quality waste heat and improving the energy utilization rate of the whole ship.
3. The system has the advantages of simple structure, lower cost and easy realization, and under the background of energy conservation and emission reduction, the invention can not only avoid a great deal of cold energy waste of LNG fuel, but also save the ship as CO 2 The electric energy required by the storage tank refrigeration also reduces the high-quality waste heat of the cylinder liner water of the ship main engine, and has good application prospect under the background of the current ship green environment-friendly opinion.
Drawings
FIG. 1 is a system diagram of the present invention;
FIG. 2 is an LNG tank and CO 2 Schematic diagram of the installation position of the storage tank on the ship;
in the accompanying drawings: LNG storage tank; 2. a pump for transferring; 3. a booster pump; 4. a refrigerant heat exchanger; 5. cylinder sleeve water heater; CO 2 A heat exchanger; 7. a refrigerant circulation pump; CO 2 A storage tank; 9. a refrigerant temperature pack; 10. a temperature relay.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent.
LNG power CO 2 Cargo hold insulation system for transport vessels utilizing fuel cold energy, as shown in FIG. 1, includes an LNG fuel supply system and CO 2 A storage tank refrigeration system. Wherein, LNG fuel feed system includes: LNG storage tank 1, transfer pump 2, booster pump 3, refrigerant heat exchanger 4, cylinder liner water heater 5.CO 2 The storage tank refrigeration system includes: refrigerant heat exchanger 4, CO 2 Heat exchanger 6, refrigerant circulation pump 7, CO 2 A storage tank 8, a refrigerant temperature bulb 9 and a temperature relay 10.
As shown in fig. 1, the system of the invention is applied to semi-cold and semi-pressure CO powered by LNG 2 On transport vessels, due to CO 2 The deck space of the carrier is sufficient, so the LNG storage tank 1 is arranged on the deck in front of the stern building of the ship. In the LNG fuel supply system, a transfer pump 2 is provided in an LNG tank 1, and functions to transfer LNG fuel from the LNG tankThe ship is rejected in step 1, and a reject pump 2, a booster pump 3, a refrigerant heat exchanger 4 and a cylinder sleeve water heater 5 are sequentially connected through pipelines, and finally the pipelines are led to a ship host; in CO 2 In the storage tank refrigerating system, a refrigerant heat exchanger 4 and CO 2 The heat exchanger 6 and the refrigerant circulating pump 7 are sequentially connected through pipelines, and CO 2 The heat exchanger 6 is arranged at CO 2 In the storage tank 8, a refrigerant temperature bulb 9 is arranged on a main pipeline after the refrigerant heat exchange and intersection, and is used for detecting the temperature of the refrigerant, and a temperature relay 10 is connected with the refrigerant temperature bulb 9 and the refrigerant circulating pump 7.
As in fig. 1 and 2, the vessel is provided with 4 CO' s 2 A tank 8, thus provided with 4 COs 2 The heat exchanger 6 is CO 2 The tank 8 being refrigerated, i.e. CO 2 The heat exchanger 6 is at each CO 2 The storage tank 8 is provided.
In CO 2 In the storage tank refrigerating system, the refrigerant in the pipeline can be selected from R170, R22, R1150, R530 and the like to exchange heat with the refrigerant heat exchanger 4, and is CO 2 The storage tank 8 transfers cold energy. An insulation layer is additionally arranged on a refrigerant circulating pipeline in the system, so that the loss of cold energy is reduced.
When the ship sails, in the LNG fuel supply system, fuel in the LNG storage tank 1 is output to the booster pump 3 through the transfer pump 2 for boosting, the boosted LNG fuel enters the refrigerant heat exchanger 4 for heat exchange, and finally the LNG fuel is gasified through the heating of the cylinder sleeve water heater 5 and is conveyed to the ship host for combustion.
In CO 2 In the storage tank refrigerating system, LNG fuel exchanges heat in the refrigerant heat exchanger 4, and under the action of the refrigerant circulating pump 7, the refrigerant exchanges heat with CO 2 The storage tank refrigerating system circulates, and the refrigerant carries cold energy to enter CO 2 CO in the tank 8 2 A heat exchanger 6 for transferring cold energy to the CO in liquid state 2 Is CO 2 The storage tank 8 is refrigerated to keep the relative low temperature, so that CO is avoided 2 BOG generation in tank 8.
In CO 2 A control system is arranged in the storage tank refrigerating system, and the refrigerant passes through CO 2 The heat exchanger 6 is CO 2 The storage tank 8 transmits cold energy, a main pipeline after the refrigerants meet is provided with a refrigerant temperature package 9, and the refrigerant temperature package 9 transmits collected temperature information to the temperature relay 10. When the temperature relay 10 detectsTo from CO 2 When the temperature of the refrigerant discharged from the storage tank is lower than a preset lower limit value (preset by man), the refrigerant circulation pump 7 stops working, and CO 2 Stopping the storage tank refrigerating system; when the temperature relay 10 detects the slave CO 2 When the temperature of the refrigerant discharged from the storage tank is higher than the set upper limit value (set in advance by people), CO 2 The refrigerating system of the storage tank restarts to work so as to realize the utilization of LNG cold energy to CO 2 CO on transport vessel 2 The storage tank 8 is insulated to avoid BOG generation.
Further, to increase CO 2 The refrigerating effect in the storage tank 8 is that the ship is floating and CO 2 When the filling rate of the tank 8 is 95%, CO 2 The heat exchanger 6 is arranged at a position 1m below the free liquid level in the storage tank, so that the refrigerant and the liquid CO in the tank body 2 And better realizes convection heat exchange.
In summary, the system of the invention is applied to semi-cold and semi-pressure CO powered by LNG 2 On transport ship, cold energy released in using LNG fuel is CO 2 Refrigeration, avoiding CO 2 BOG generation in the tank 8, without additional CO for the vessel 2 Storage tank 8 refrigeration plant, greatly reduced boats and ships CO 2 The initial investment cost of the storage tank 8 refrigeration equipment and the electric power cost when the equipment is operated have higher practical value.
The foregoing is merely a preferred embodiment of the present invention, but is not limited to the examples described above, and 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 present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (2)
1.LNG power CO 2 Cargo hold insulation system of transport ship utilization fuel cold energy, its characterized in that: the system includes an LNG fueling system and CO 2 A storage tank refrigeration system,
the LNG fueling system comprises: an LNG storage tank (1), a lightering pump (2), a booster pump (3), a refrigerant heat exchanger (4) and a cylinder sleeve water heater (5),
the CO 2 The storage tank refrigeration system includes: refrigerant heat exchanger (4), CO 2 Heat exchanger (6), refrigerant circulating pump (7) and CO 2 A storage tank (8), a refrigerant temperature bulb (9) and a temperature relay (10),
in CO 2 In the storage tank refrigerating system, the refrigerant heat exchanger (4) and CO 2 The heat exchanger (6), the refrigerant temperature pack (9) and the refrigerant circulating pump (7) are sequentially connected through pipelines, and CO 2 The heat exchanger (6) is arranged at the CO 2 In the storage tank (8), LNG fuel exchanges heat in the refrigerant heat exchanger (4), and the refrigerant carries cold energy to enter CO 2 CO in a tank (8) 2 A heat exchanger (6) for transferring cold energy to the CO in liquid state 2 ，
In CO 2 The storage tank refrigerating system is internally provided with a control system, the refrigerant temperature bulb (9), the temperature relay (10) and the refrigerant circulating pump (7) are electrically connected with each other, and the refrigerant temperature bulb (9) is arranged on a refrigerant through CO 2 On a main pipeline after heat exchange intersection of the heat exchanger (6), the refrigerant temperature package (9) transmits collected temperature information to the temperature relay (10), and when the temperature relay (10) detects the secondary CO 2 When the temperature of the refrigerant discharged from the storage tank is lower than a set lower limit value, the refrigerant circulating pump (7) stops working, and CO 2 The tank refrigeration system is stopped when the temperature relay (10) detects the secondary CO 2 When the temperature of the refrigerant discharged from the storage tank is higher than the set upper limit value, CO 2 The storage tank refrigerating system restarts to work so as to realize the utilization of LNG cold energy to CO 2 CO on transport vessel 2 The storage tank (8) is used for heat preservation, BOG is avoided,
in the ship floating state and CO 2 When the filling rate of the storage tank (8) is 95%, CO 2 The heat exchanger (6) is arranged at a position 1m below the free liquid level in the storage tank.
2. An LNG-powered CO according to claim 1 2 Cargo hold insulation system of transport ship utilization fuel cold energy, its characterized in that: in the LNG fuel supply system, the transfer pump (2) is arranged in the LNG storage tank (1), and the transfer pump (2), the booster pump (3) and the cold water are arranged in the LNG storage tankThe medium heat exchanger (4) and the cylinder sleeve water heater (5) are sequentially connected through pipelines and finally lead to a ship host.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111162451.1A CN113697083B (en) | 2021-09-30 | 2021-09-30 | LNG power CO 2 Cargo hold heat preservation system for transport ship by using fuel cold energy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111162451.1A CN113697083B (en) | 2021-09-30 | 2021-09-30 | LNG power CO 2 Cargo hold heat preservation system for transport ship by using fuel cold energy |
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| Publication Number | Publication Date |
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| CN113697083A CN113697083A (en) | 2021-11-26 |
| CN113697083B true CN113697083B (en) | 2024-02-20 |
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| CN114954798A (en) * | 2022-07-07 | 2022-08-30 | 广东海洋大学 | Liquefied carbon dioxide carrier cargo hold heat preservation system utilizing ammonia fuel cold energy |
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| CN113697083A (en) | 2021-11-26 |
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