CN115158625A - System and method for recycling cold energy of low-temperature fuel of ship and ship - Google Patents
System and method for recycling cold energy of low-temperature fuel of ship and ship Download PDFInfo
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- CN115158625A CN115158625A CN202210835481.2A CN202210835481A CN115158625A CN 115158625 A CN115158625 A CN 115158625A CN 202210835481 A CN202210835481 A CN 202210835481A CN 115158625 A CN115158625 A CN 115158625A
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- 239000000446 fuel Substances 0.000 title claims abstract description 148
- 238000004064 recycling Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003507 refrigerant Substances 0.000 claims abstract description 65
- 238000011084 recovery Methods 0.000 claims abstract description 40
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 239000002828 fuel tank Substances 0.000 claims abstract description 15
- 239000002737 fuel gas Substances 0.000 claims description 31
- 239000007789 gas Substances 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000004378 air conditioning Methods 0.000 claims description 20
- 239000013505 freshwater Substances 0.000 claims description 20
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 11
- 239000006200 vaporizer Substances 0.000 claims description 10
- 239000002826 coolant Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 15
- 238000002309 gasification Methods 0.000 abstract description 9
- 230000009467 reduction Effects 0.000 abstract description 5
- 238000004146 energy storage Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 14
- 238000013461 design Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000003949 liquefied natural gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
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- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
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Images
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
- B63B17/0027—Tanks for fuel or the like ; Accessories therefor, e.g. tank filler caps
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to the technical field of ships, in particular to a system and a method for recycling cold energy of low-temperature fuel of a ship and the ship, wherein the system comprises a low-temperature liquefied fuel tank, a low-temperature liquefied fuel supply pump, a fuel gasifier, a circulating pump, a cold energy recycling heat exchanger, a refrigerant heater, a gas heater, a cold storage pool heat exchanger and a fluid pipeline; the fluid pipeline is communicated with the cold energy storage tank, and a refrigerant used for carrying cold energy is arranged in the fluid pipeline; this application is to low temperature liquid fuel's air feed flow, with the high-quality cold energy recovery that releases among the liquid fuel gasification, store and recycle in air conditioner and the refrigerating system on the boats and ships, can operate under the different operating condition of boats and ships, can effectual reduction air conditioner and refrigerating system's power consumption, reduce the fuel consumption total amount in the boats and ships operation, improve boats and ships efficiency index.
Description
Technical Field
The invention relates to the technical field of ships, in particular to a system and a method for recycling cold energy of low-temperature fuel of a ship and the ship.
Background
With the increasing severity of the world climate problem, people pay more and more attention to environmental protection, and the traditional ships mainly use heavy oil as fuel, have larger total power and have amazing emission data. The shipping industry continuously achieves the aims of energy conservation and emission reduction through technical innovation so as to control the total carbon emission in the global range.
The new environment-friendly green fuel is more and more pursued by the shipping industry, and more new ships adopt the environment-friendly fuel such as liquefied natural gas, hydrogen, ammonia and the like, so that the emission of carbon dioxide which is other greenhouse emissions can be reduced to a greater degree. The clean fuel is characterized in that the clean fuel needs to be stored at low temperature in a liquefied state, and is conveyed to a main engine, a generator or a boiler for gas supply after being gasified. The liquefied low-temperature fuel contains huge high-quality cold energy, and can be applied to the cold quantity requirement of the ship in the running process after being converted.
Low-temperature clean fuel such as liquefied natural gas adopted on the existing ship needs to be stored at the temperature of-163 ℃, and can be transported to users on the ship for use after being gasified and heated to the temperature of more than 20 ℃ by a gas supply system. The gasification process of the low-temperature liquid fuel needs to adopt fresh water or seawater on the ship for heating, and the cold energy carried by the seawater after heat exchange is directly discharged into the sea, thereby causing a great deal of energy waste.
Disclosure of Invention
The invention aims to provide a ship low-temperature fuel cold energy recycling system, which can recycle, store and reuse high-quality cold energy released in the gasification process of liquid fuel in an air-conditioning and refrigerating system on a ship aiming at the air supply flow of low-temperature liquid fuel, can operate under different operating conditions of the ship, and can effectively reduce the electric energy consumption of the air-conditioning and refrigerating system, thereby reducing the total fuel consumption in the operation process of the ship and improving the energy efficiency index of the ship.
The invention also aims to provide a low-temperature fuel cold energy recycling method of the ship low-temperature fuel cold energy recycling system, which aims at the gas supply process of low-temperature liquid fuel, recycles, stores and recycles high-quality cold energy released in the gasification process of the liquid fuel to an air conditioner and a refrigeration system on a ship, can operate under different operation conditions of the ship, and can effectively reduce the electric energy consumption of the air conditioner and the refrigeration system, thereby reducing the total fuel consumption in the operation process of the ship and improving the energy efficiency index of the ship.
The invention also aims to provide a ship, which can recover, store and reuse high-quality cold energy released in the gasification process of the liquid fuel in an air conditioning and refrigerating system on the ship aiming at the air supply process of the low-temperature liquid fuel, can operate under different operating conditions of the ship, and can effectively reduce the electric energy consumption of the air conditioning and refrigerating system, thereby reducing the total fuel consumption in the operation process of the ship and improving the energy efficiency index of the ship.
The technical scheme of the invention is realized as follows:
a ship low-temperature fuel cold energy recycling system comprises a low-temperature liquefied fuel tank, a low-temperature liquefied fuel supply pump, a fuel gasifier, a circulating pump, a cold energy recycling heat exchanger, a refrigerant heater, a fuel gas heater, a cold storage pool heat exchanger and a fluid pipeline;
the fuel gasifier, the circulating pump, the cold energy recovery heat exchanger, the refrigerant heater, the gas heater and the cold storage pool heat exchanger are communicated through the fluid pipeline, and the fluid pipeline is filled with a refrigerant;
the output end of the low-temperature liquefied fuel tank is communicated with the input end of the low-temperature liquefied fuel supply pump, the output end of the low-temperature liquefied fuel supply pump is communicated with the input end of the fuel gasifier, the output end of the fuel gasifier is simultaneously communicated with the input end of the cold energy recovery heat exchanger and the input end of the gas heater, and the output end of the gas heater is communicated with shipboard gas-using equipment for use;
the output end of the cold energy recovery heat exchanger is communicated with an on-board air-conditioning refrigerant water system, the output end of the cold energy recovery heat exchanger is communicated with the input end of the cold storage pool heat exchanger, the cold storage pool heat exchanger can act on fresh water in the cold storage pool, the output end of the cold storage pool heat exchanger is communicated with the input end of the refrigerant heater, the output end of the refrigerant heater is communicated with the input end of the circulating pump, and the output end of the circulating pump is communicated with the input end of the fuel gasifier.
Furthermore, the output end of the gas heater is communicated with the input end of the refrigerant heater, the output end of the refrigerant heater is communicated with a fresh water cooling system on the ship, and the fresh water cooling system is communicated with the gas heater.
Further, the fluid pipelines comprise a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline and a sixth pipeline;
the output end of the fuel gasifier is communicated with the input end of the cold energy recovery heat exchanger through the first pipeline, is communicated with the input end of the fuel gas heater through the second pipeline, the output end of the cold energy recovery heat exchanger is communicated with the input end of the cold storage pool heat exchanger through the third pipeline, the output end of the cold storage pool heat exchanger is communicated with the input end of the refrigerant heater through the fourth pipeline, the output end of the refrigerant heater is communicated with the input end of the circulating pump through the fifth pipeline, and the output end of the circulating pump is communicated with the input end of the fuel gasifier through the sixth pipeline.
Further, an expansion tank is arranged on the fifth pipeline.
Further, control valves are arranged between the first pipeline and the third pipeline, between the third pipeline and the fourth pipeline, between the fourth pipeline and the fifth pipeline, and between the sixth pipeline and the first pipeline.
Further, a control module is provided for controlling each of the control valves.
Furthermore, an insulation heat preservation structure and an automatic water replenishing device are arranged in the cold storage pool.
Furthermore, ethylene glycol is selected as the refrigerant.
The application also provides a low-temperature fuel cold energy recycling method based on the system, wherein the low-temperature liquefied fuel supply pump extracts the low-temperature liquefied fuel in the low-temperature liquefied fuel tank and conveys the low-temperature liquefied fuel to the fuel gasifier;
the fuel gasifier gasifies the low-temperature liquefied fuel to form fuel gas, and after the fuel gas is conveyed to the fuel gas heater, the fuel gas heater heats the fuel gas to a designed working temperature and conveys the fuel gas to gas-using equipment on a ship for use;
or the fuel gasifier gasifies the low-temperature liquefied fuel to form fuel gas and release cold energy, the released cold energy is transferred to the refrigerant in the fluid pipeline, and the refrigerant carrying cold energy sequentially flows through the cold energy recovery heat exchanger, the cold storage pool heat exchanger and the refrigerant heater through the fluid pipeline to complete cold energy exchange and is conveyed to the fuel gasifier through the circulating pump to complete closed circulation;
the cold energy recovery heat exchanger is used for applying cold energy to an on-board air-conditioning refrigerant water system, the on-board air-conditioning refrigerant water system is met, meanwhile, surplus cold energy is transmitted to the cold storage tank heat exchanger, and the cold storage tank heat exchanger is used for freezing and refrigerating fresh water in the cold storage tank by using the surplus cold energy so as to recover and store the surplus cold energy;
the surplus cold energy recovered and stored in the cold storage tank is reused for an air-conditioning refrigerant water system on the ship through the circulating pump.
The application also provides a ship, include ship cryogenic fuel cold energy recovery system of recycling.
Compared with the prior art, the invention has the beneficial effects that:
the utility model provides a system of recycling is retrieved to low temperature fuel cold energy, to low temperature liquid fuel's air feed flow, retrieve, store and recycle in the high-quality cold energy that liquid fuel gasification in-process released air conditioner and the refrigerating system on the boats and ships, can operate under the different operation condition of boats and ships, can effectual reduction air conditioner and refrigerating system's power consumption to reduce the fuel consumption total amount of boats and ships operation in-process, improve the efficiency index of boats and ships.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic design flow chart of a system for recycling cold energy of a low-temperature fuel for a ship in embodiment 1 of the present invention.
In the figure: (description of reference numerals)
1-a cryogenic liquefied fuel supply pump; 2-a fuel gasifier; 3-a cold storage pool; 4-a circulating pump; 5-cold energy recovery heat exchanger; 6-a refrigerant heater; 7-a gas heater; 8-a cold storage pool heat exchanger; 9-an expansion tank; 10-a cryogenic liquefied fuel tank; 11-gas using equipment; 12-air conditioner refrigerant water system; 13-a fresh water cooling system; 14-control module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the present product is conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "suspended" and the like do not imply that the components are absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments and features of the embodiments described below can be combined with each other without conflict.
Example 1
Referring to fig. 1, the present embodiment provides a technical solution, as follows:
a ship low-temperature fuel cold energy recycling system comprises a low-temperature liquefied fuel tank 10, a low-temperature liquefied fuel supply pump 1, a fuel gasifier 2, a circulating pump 4, a cold energy recycling heat exchanger 5, a refrigerant heater 6, a gas heater 7, a cold storage pool heat exchanger 8 and a fluid pipeline;
the fuel gasifier 2, the circulating pump 4, the cold energy recovery heat exchanger 5, the refrigerant heater 6, the gas heater 7 and the cold storage pool heat exchanger 8 are communicated through a fluid pipeline, and the fluid pipeline is filled with a refrigerant. It should be noted that the refrigerant is an intermediate substance in the refrigeration process, and it receives the cold energy of the refrigerant to cool down, and then cools down other cooled substances.
In this embodiment, ethylene glycol is preferably used as the refrigerant.
In the embodiment, the output end of the cryogenic liquefaction fuel tank 10 is communicated with the input end of the cryogenic liquefaction fuel supply pump 1, the output end of the cryogenic liquefaction fuel supply pump 1 is communicated with the input end of the fuel gasifier 2, the output end of the fuel gasifier 2 is simultaneously communicated with the input end of the cold energy recovery heat exchanger 5 and the input end of the gas heater 7, and the output end of the gas heater 7 is communicated to the shipboard gas-using equipment 11 for use (the gas-using equipment 11 is a fuel host, a generator or a boiler, etc.).
In this embodiment, the output of cold energy recovery heat exchanger 5 accesss to on-board air conditioner refrigerant water system 12, and the output of cold energy recovery heat exchanger 5 and cold storage pool heat exchanger 8's input intercommunication simultaneously, and cold storage pool heat exchanger 8 can act on the fresh water in the cold storage pool 3 with the cold energy, and the output of cold storage pool heat exchanger 8 and refrigerant heater 6's input intercommunication, refrigerant heater 6's output and circulating pump 4's input intercommunication, and circulating pump 4's output and fuel vaporizer 2's input intercommunication.
The utility model provides a system of recycling is retrieved to low temperature fuel cold energy, to the air feed flow of low temperature liquid fuel, retrieve, store and recycle in the high-quality cold energy that liquid fuel gasification in-process released in air conditioner and the refrigerating system on the boats and ships, can operate under the different operating condition of boats and ships, can effectual reduction air conditioner and refrigerating system's power consumption to reduce the fuel consumption total amount of boats and ships operation in-process, improve the energy efficiency index of boats and ships.
In the present embodiment, the cryogenic liquefaction fuel tank 10 is used to supply cryogenic liquefaction fuel.
The low-temperature liquefied fuel supply pump 1 is configured to pump the low-temperature liquefied fuel in the low-temperature liquefied fuel tank 10 and deliver the pumped low-temperature liquefied fuel to the fuel vaporizer 2.
The low-temperature liquefied fuel supply pump 1 pumps the low-temperature liquefied fuel in the low-temperature liquefied fuel tank 10 and conveys the fuel to the fuel vaporizer 2, and then the fuel vaporizer 2 vaporizes the low-temperature liquefied fuel, turns the fuel into gas, absorbs heat in the process of vaporization, releases high-quality cold energy, and then conveys the gas to the gas heater 7 or the cold energy recovery heat exchanger 5.
In the present embodiment, after the fuel gas is delivered to the fuel gas heater 7, the fuel gas heater 7 can heat the fuel gas to the designed operating temperature, and then deliver the heated fuel gas to the gas-using equipment 11 (the gas-using equipment 11 is, for example, a fuel main machine, a generator, a boiler, or the like) on the ship for use (the designed operating temperature is set according to the fuel main machine). Specifically, waste heat generated in the fresh water cooling system 13 on the ship heats the gasified fuel gas to 20-35 degrees, and then is used for the gas-using equipment 11. It should be noted that the waste heat is generally generated when the fuel host (the fuel host is generally a dual-fuel host) operates.
In this embodiment, after the gas is delivered to the cold energy recovery heat exchanger 5, the cold energy carried by the refrigerant sequentially flows through the cold energy recovery heat exchanger 5, the cold storage tank heat exchanger 8 and the refrigerant heater 6 through the fluid pipeline to complete cold energy exchange, and after the cold energy exchange, the gas is delivered to the fuel vaporizer 2 through the circulating pump 4 to complete a closed cycle.
In this embodiment, the cold energy recovery heat exchanger 5 can use the cold energy of the approach for the on-board air conditioning refrigerant water system 12, and deliver the surplus cold energy to the cold storage tank heat exchanger 8, and the cold storage tank heat exchanger 8 can freeze and refrigerate the fresh water in the cold storage tank 3 by using the surplus cold energy, so as to recover and store the surplus cold energy.
In the present embodiment, the surplus cooling energy recovered and stored in the cold storage tank 3 can be reused in the air-conditioning coolant system 12 on the ship by the circulation pump 4, and thus the cooling energy can be recovered and reused.
In the embodiment, due to the storage function of the cold storage pool 3, an insulation structure is designed inside the cold storage pool 3 to prevent the cold energy from losing; an automatic water replenishing device is further arranged in the cold storage pool 3 and used for automatically replenishing fresh water and realizing automatic management.
In the present embodiment, the fluid pipelines include a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline, a seventh pipeline and an eighth pipeline (which are shown in fig. 1 and not numbered), and the connection modes are as follows:
as shown in fig. 1, the output end of the fuel vaporizer 2 is communicated with the input end of the cold energy recovery heat exchanger 5 through a first pipeline, and is communicated with the input end of the gas heater 7 through a second pipeline, the output end of the cold energy recovery heat exchanger 5 is communicated with the input end of the cold storage pool heat exchanger 8 through a third pipeline, the output end of the cold storage pool heat exchanger 8 is communicated with the input end of the refrigerant heater 6 through a fourth pipeline, the output end of the refrigerant heater 6 is communicated with the input end of the circulating pump 4 through a fifth pipeline, and the output end of the circulating pump 4 is communicated with the input end of the fuel vaporizer 2 through a sixth pipeline. The components in the system are communicated through connecting pipelines so as to facilitate the circulation of the low-temperature liquefied fuel.
In this embodiment, the output end of the gas heater 7 is further communicated with the input end of the refrigerant heater 6 through a seventh pipeline, the output end of the refrigerant heater 6 is further communicated with an on-board fresh water cooling system 13 through an eighth pipeline, the fresh water cooling system 13 is further communicated with the gas heater 7, and a control valve is arranged between the seventh pipeline and the eighth pipeline (the seventh pipeline, the eighth pipeline and the control valve arranged thereon are shown in fig. 1, but are not numbered). Specifically, the initial temperature of the fresh water from the on-board fresh water cooling system 13 is 50-60 ℃, the temperature is reduced to about 45 ℃ after passing through the gas heater 7, and then the temperature is reduced to about 35 ℃ through the refrigerant heater 6; the refrigerant is stable at about-11 degrees after coming out of the fuel gasifier 2, and when the cold storage tank 3 does not work or the load of the cold energy recovery heat exchanger 5 is insufficient, the refrigerant needs to be heated to about 0 to-4 degrees by the refrigerant heater 6.
It is noted that an expansion tank 9 is provided in the fifth line for controlling the pressure in the closed circuit.
In this embodiment, control valves are arranged between the first pipeline and the third pipeline, between the third pipeline and the fourth pipeline, between the fourth pipeline and the fifth pipeline, and between the sixth pipeline and the first pipeline, and each link in the closed loop is controlled to be opened or closed through the control valves. A control module 14 is also provided, by means of which control module 14 the individual control valves (which are shown in the figure and not numbered because they control different devices) are controlled.
The system work flow is as follows:
1. the low-temperature fuel in the low-temperature liquefied fuel tank 10 is conveyed to the fuel gasifier 2 through the low-temperature liquefied fuel supply pump 1 for gasification, then is heated to a designed working temperature through the fuel gas heater 7, and is conveyed to a host machine, a generator or a boiler on a ship for use (the designed working temperature is set according to the fuel host machine);
2. the low-temperature fuel transfers cold energy to a refrigerant (glycol) with a low freezing point through the fuel gasifier 2, and the water-based glycol carrying cold energy is conveyed to the fuel gasifier 2 through the circulating pump 4 to complete closed circulation after sequentially passing through the cold energy recovery heat exchanger 5, the cold storage pool 3, the refrigerant heater 6 and a connected system or facility to complete cold energy exchange;
3. when the shipboard air supply system works, the released cold energy meets the requirement of the shipboard air-conditioning refrigerant water system 12 through the cold energy recovery heat exchanger 5, and meanwhile, the surplus cold energy freezes and refrigerates the fresh water in the cold storage tank 3 through the cold storage tank heat exchanger 8 to store cold energy;
4. when the shipboard air supply system does not work, the cold energy stored in the cold storage pool 3 is conveyed to the cold energy recovery heat exchanger 5 through the water-based ethylene glycol with a low freezing point through the circulating pump 4, so that cold energy is provided for the shipboard air-conditioning refrigerant water system 12, and the cold energy is recycled.
Example 2
The present embodiment provides a technical solution, as follows:
a low-temperature fuel cold energy recycling method based on the ship low-temperature fuel cold energy recycling system in the embodiment 1: the low-temperature liquefied fuel supply pump 1 pumps the low-temperature liquefied fuel in the low-temperature liquefied fuel tank 10 and delivers the low-temperature liquefied fuel to the fuel vaporizer 2;
the fuel gasifier 2 gasifies the low-temperature liquefied fuel to form fuel gas, and after the fuel gas is conveyed to the fuel gas heater 7, the fuel gas heater 7 heats the fuel gas to a designed working temperature and conveys the fuel gas to the gas-using equipment 11 on the ship for use;
or the fuel gasifier 2 gasifies the low-temperature liquefied fuel to form fuel gas and release cold energy, the released cold energy is transferred to a refrigerant in a fluid pipeline, and the refrigerant carrying the cold energy sequentially flows through the cold energy recovery heat exchanger 5, the cold storage pool heat exchanger 8 and the refrigerant heater 6 through the fluid pipeline to complete cold energy exchange and is conveyed to the fuel gasifier 2 through the circulating pump 4 to complete closed circulation;
the cold energy recovery heat exchanger 5 uses cold energy for the on-board air-conditioning refrigerant water system 12, and transmits surplus cold energy to the cold storage pool heat exchanger 8 while meeting the requirement of the on-board air-conditioning refrigerant water system 12, and the cold storage pool heat exchanger 8 uses the surplus cold energy to freeze and refrigerate fresh water in the cold storage pool 3 so as to recover and store the surplus cold energy;
the surplus cold energy recovered and stored in the cold storage tank 3 is reused in the air-conditioning refrigerant water system 12 on the ship through the circulating pump 4.
Example 3
This embodiment provides another technical solution, as follows:
a ship comprises the ship low-temperature fuel cold energy recycling system in embodiment 1, aiming at the air supply flow of low-temperature liquid fuel, high-quality cold energy released in the gasification process of the liquid fuel is recycled, stored and reused for an air conditioner and a refrigeration system on the ship, the ship can operate under different operation working conditions of the ship, the electric energy consumption of the air conditioner and the refrigeration system can be effectively reduced, the total fuel consumption in the operation process of the ship is reduced, and the energy efficiency index of the ship is improved.
The design of the system for recycling the cold energy of the low-temperature fuel of the passenger ship is suitable for the passenger ship with complex and variable operation conditions, the cold energy generated by the air supply system when the host machine using the low-temperature fuel works under different loads can be fully recycled, and the system provides service for the air-conditioning and refrigerating system on the ship in a conveying and storing mode, so that the requirement of the air-conditioning and refrigerating system of the passenger ship on an electric power system during working is reduced, the total fuel consumption during the operation of the ship is favorably reduced, and the carbon emission control is favorably realized.
High-end equipment manufacturing is one of important development directions of the development of the ship industry in China, a large mail steamer is taken as a typical representative of the high-end equipment manufacturing, and the domestic design and construction of the large mail steamer are steadily promoted in domestic shipyards at present. Global climate problems are becoming more severe, and the International Maritime Organization (IMO) has higher and higher requirements on the energy efficiency utilization rate of ships and stricter emission limits on the ships.
The invention can be directly applied to the design of a cold energy recycling system of a newly-built passenger ship, and can also carry out technical transformation and upgrading on the existing passenger ship provided with a low-temperature fuel system according to the design principle, thereby achieving the effects of energy conservation and emission reduction of the passenger ship under various complex working conditions and meeting the requirements of relevant energy efficiency regulations of IMO.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Moreover, those of skill in the art will appreciate that while some embodiments herein include some features included in other embodiments, not others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The system for recycling and reusing the cold energy of the low-temperature fuel of the ship is characterized by comprising a low-temperature liquefied fuel tank (10), a low-temperature liquefied fuel supply pump (1), a fuel gasifier (2), a circulating pump (4), a cold energy recycling heat exchanger (5), a refrigerant heater (6), a gas heater (7), a cold storage pool heat exchanger (8) and a fluid pipeline;
the fuel gasifier (2), the circulating pump (4), the cold energy recovery heat exchanger (5), the refrigerant heater (6), the gas heater (7) and the cold storage pool heat exchanger (8) are communicated through the fluid pipeline, and the fluid pipeline is filled with a refrigerant;
the output end of the low-temperature liquefied fuel tank (10) is communicated with the input end of the low-temperature liquefied fuel supply pump (1), the output end of the low-temperature liquefied fuel supply pump (1) is communicated with the input end of the fuel gasifier (2), the output end of the fuel gasifier (2) is simultaneously communicated with the input end of the cold energy recovery heat exchanger (5) and the input end of the gas heater (7), and the output end of the gas heater (7) is communicated to an on-board gas appliance (11) for use;
the output of cold energy recovery heat exchanger (5) accesss to on-board air conditioner refrigerant water system (12), simultaneously the output of cold energy recovery heat exchanger (5) with the input intercommunication of cold storage pond heat exchanger (8), cold storage pond heat exchanger (8) can act on the fresh water in cold storage pond (3), the output of cold storage pond heat exchanger (8) with the input intercommunication of refrigerant heater (6), the output of refrigerant heater (6) with the input intercommunication of circulating pump (4), the output of circulating pump (4) with the input intercommunication of fuel vaporizer (2).
2. The cold energy recycling system for marine cryogenic fuel according to claim 1, wherein the output end of the gas heater (7) is further communicated with the input end of the coolant heater (6), the output end of the coolant heater (6) is further communicated to an on-board fresh water cooling system (13), and the fresh water cooling system (13) is further communicated to the gas heater (7).
3. The marine cryogenic fuel cold energy recovery and reuse system of claim 1, wherein the fluid lines comprise a first line, a second line, a third line, a fourth line, a fifth line, and a sixth line;
the output end of the fuel gasifier (2) is communicated with the input end of the cold energy recovery heat exchanger (5) through the first pipeline, is communicated with the input end of the fuel gas heater (7) through the second pipeline, the output end of the cold energy recovery heat exchanger (5) is communicated with the input end of the cold storage pool heat exchanger (8) through the third pipeline, the output end of the cold storage pool heat exchanger (8) is communicated with the input end of the refrigerant heater (6) through the fourth pipeline, the output end of the refrigerant heater (6) is communicated with the input end of the circulating pump (4) through the fifth pipeline, and the output end of the circulating pump (4) is communicated with the input end of the fuel gasifier (2) through the sixth pipeline.
4. The marine cryogenic fuel cold energy recovery and reuse system according to claim 3, characterized in that an expansion tank (9) is provided on the fifth pipeline.
5. The marine cryogenic fuel cold energy recovery and reuse system according to claim 3, wherein control valves are provided between the first pipeline and the third pipeline, between the third pipeline and a fourth pipeline, between the fourth pipeline and the fifth pipeline, and between the sixth pipeline and the first pipeline.
6. Marine vessel cryogenic fuel cold energy recovery and re-use system according to claim 5, characterised in that a control module (14) is further provided for controlling each of the control valves.
7. The cold energy recycling system for marine cryogenic fuel according to claim 1, wherein an insulating and heat-preserving structure and an automatic water replenishing device are arranged in the cold storage pool (3).
8. The system for recycling cold energy of marine cryogenic fuel according to claim 1, wherein the coolant is ethylene glycol.
9. A cryogenic fuel cold energy recycling method based on the system of claim 1, characterized in that the cryogenic liquefied fuel supply pump (1) pumps the cryogenic liquefied fuel in the cryogenic liquefied fuel tank (10) and delivers it to the fuel vaporizer (2);
the fuel gasifier (2) gasifies the low-temperature liquefied fuel to form fuel gas, and after the fuel gas is conveyed to the fuel gas heater (7), the fuel gas heater (7) heats the fuel gas to a designed working temperature and conveys the fuel gas to gas-using equipment (11) on a ship for use;
or the fuel gasifier (2) gasifies the low-temperature liquefied fuel to form fuel gas and release cold energy, the released cold energy is transferred to the refrigerant in the fluid pipeline, and the refrigerant carrying the cold energy sequentially flows through the cold energy recovery heat exchanger (5), the cold storage pool heat exchanger (8) and the refrigerant heater (6) through the fluid pipeline to complete cold energy exchange, and is conveyed to the fuel gasifier (2) through the circulating pump (4) to complete a closed cycle;
the cold energy recovery heat exchanger (5) uses cold energy for the on-board air-conditioning refrigerant water system (12), the requirement of the on-board air-conditioning refrigerant water system (12) is met, meanwhile, surplus cold energy is transmitted to the cold storage pool heat exchanger (8), and the cold storage pool heat exchanger (8) uses the surplus cold energy to freeze and refrigerate fresh water in the cold storage pool (3) so as to recover and store the surplus cold energy;
surplus cold energy recovered and stored in the cold storage pool (3) is reused for an air-conditioning refrigerant water system (12) on the ship through the circulating pump (4).
10. A marine vessel comprising the marine vessel cryogenic fuel cold energy recovery and reuse system of any one of claims 1 to 8.
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| CN202210835481.2A CN115158625B (en) | 2022-07-15 | 2022-07-15 | Ship low-temperature fuel cold energy recycling system and method and ship |
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