CN111366024A - Cold energy utilization system and method for refrigeration of LNG (liquefied Natural gas) power ship - Google Patents
Cold energy utilization system and method for refrigeration of LNG (liquefied Natural gas) power ship Download PDFInfo
- Publication number
- CN111366024A CN111366024A CN202010299913.3A CN202010299913A CN111366024A CN 111366024 A CN111366024 A CN 111366024A CN 202010299913 A CN202010299913 A CN 202010299913A CN 111366024 A CN111366024 A CN 111366024A
- Authority
- CN
- China
- Prior art keywords
- cold
- storage tank
- temperature
- heat exchanger
- cold energy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/26—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for frozen goods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D2020/006—Heat storage systems not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D2020/0065—Details, e.g. particular heat storage tanks, auxiliary members within tanks
- F28D2020/0082—Multiple tanks arrangements, e.g. adjacent tanks, tank in tank
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Ocean & Marine Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a cold energy utilization system and a method for LNG power ship refrigeration, belonging to the technical field of LNG power ship refrigeration cold energy utilization, and comprising a storage tank, a cold energy recovery heat exchanger, a heating heat exchanger and a buffer tank, wherein the buffer tank is connected with an engine through a pipeline, and a high-temperature cold energy recovery heat exchanger, a cold energy recovery heat exchanger and a low-temperature cold energy storage tank are arranged to form a cold energy recovery cycle; the cold energy is released from the low-temperature cold storage tank to the high-temperature cold storage tank, so that cold energy utilization circulation is formed, the cold energy released in the LNG gasification process is effectively utilized, the power requirement of an engine is met, and meanwhile, the temperature of the cold storage agent in the low-temperature cold storage tank is always kept within a set temperature range through system control so as to be used for space refrigeration, only one cold storage agent is used in the whole system, the system design is clear, the maintenance is simple, and the cost is low.
Description
Technical Field
The invention relates to the technical field of cold energy utilization of refrigeration of LNG (liquefied natural gas) powered ships, in particular to a cold energy utilization system and method for refrigeration of LNG powered ships.
Background
At present, with the stricter and stricter global and domestic control on the emission of harmful gases of ships, the ships tend to use pure LNG power or LNG/fuel oil dual-fuel power, but when LNG is converted into normal-temperature natural gas which can be normally combusted by ship engines, the released cold energy is wasted and is not fully utilized. Some methods have been proposed to utilize the cold energy of LNG, but these methods have some problems:
1. more is theoretical analysis, and lacks consideration of practical application, and even lacks consideration under the limit of practical equipment boundary conditions, and the possibility of practical application on the ship is not high;
2. the modes usually cover various ways which can utilize the cold energy of the LNG and are greedy to be completed, although the modes are many, the effect and the degree of realizing each target are limited, and the modes are not deeply designed for a special purpose, so that a certain special requirement of ship application is well met;
3. although the existing mode can meet the requirement of realizing in principle, due to lack of consideration of practical application, even if the existing mode can be really applied to a practical ship, the existing mode also has the defects of high realization cost, complex structure, low efficiency, heavy burden on the space and weight of the ship and the like;
disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a cold energy utilization system and a method for refrigerating an LNG power ship, wherein a high-temperature cold storage tank, a cold energy recovery heat exchanger and a low-temperature cold storage tank are arranged to form a cold energy recovery cycle; the cold energy released from the low-temperature cold storage tank is released to the high-temperature cold storage tank to form cold energy utilization circulation, so that the cold energy released in the LNG gasification process is effectively utilized, the system design is clear, the maintenance is simple, and the cost is low.
The technical scheme for realizing the purpose is as follows:
the invention provides a cold energy utilization system for refrigerating an LNG power ship, which comprises an LNG storage tank, a cold energy recovery heat exchanger and a buffer tank, wherein the buffer tank is connected with an engine through a pipeline, the cold energy recovery heat exchanger is provided with a first cold end inlet and a first cold end outlet, the storage tank is connected with the first cold end inlet through a first valve, the first cold end outlet is sequentially connected with a natural gas heating heat exchanger and the buffer tank, the heating heat exchanger is connected with an external heating medium and is used for increasing the temperature of transmitted natural gas and achieving the temperature interval of normal operation of the engine;
the cold energy recovery heat exchanger is also provided with a first hot end inlet and a first hot end outlet, the first hot end outlet is connected with a low-temperature cold storage tank through a third valve, and is connected with a high-temperature cold storage tank through a fourth valve, the high-temperature cold storage tank is connected with the first hot end inlet through a first driving pump to form a cold energy recovery circulating system, secondary refrigerant in the high-temperature cold storage tank is subjected to sufficient heat exchange with LNG in the cold energy recovery heat exchanger, and under the condition that the LNG flow change required by an engine is met, the temperature of the secondary refrigerant after flowing out of the cold energy recovery heat exchanger is kept in a set temperature range by controlling the flow of the first driving pump, and then the secondary refrigerant flows into the low-temperature cold storage tank for use;
the low-temperature cold storage tank is also provided with an outlet, the outlet is connected with a plurality of fifth valves and first air-conditioning heat exchangers which are arranged in parallel through a second driving pump, each fifth valve controls one first air-conditioning heat exchanger to provide cold energy for refrigeration for the space where the first air-conditioning heat exchanger is located, and a plurality of secondary refrigerant outlets of the first air-conditioning heat exchangers are connected with the high-temperature cold storage tank to form a cold energy utilization circulating system.
Further, the first cold end outlet is connected with the gas phase space of the storage tank through a second valve, and the pressure requirement in the storage tank is met.
Furthermore, the second driving pump is also connected with a second air-conditioning heat exchanger sequentially through an eighth valve and a refrigeration heat exchanger, and a secondary refrigerant outlet of the second air-conditioning heat exchanger is connected with the high-temperature cold storage tank;
the refrigeration heat exchanger is provided with a second cold end inlet, a second cold end outlet, a second hot end inlet and a second hot end outlet, the eighth valve is connected with the second hot end inlet, the second hot end outlet is connected with the second air-conditioning heat exchanger, the second cold end outlet is connected with a radiator through a compressor, the radiator is connected with the second cold end inlet through a throttle valve, additional refrigeration circulation is formed, refrigeration cold energy under higher requirements is provided, and an emergency standby cold source of the cold energy utilization system can be provided.
Furthermore, the secondary refrigerants in the low-temperature cold storage tank, the high-temperature cold storage tank, the cold energy recovery pipeline and the cold energy utilization circulating system are the same secondary refrigerant, so that heat loss caused by heat exchange among different secondary refrigerants is avoided.
Further, the working temperature range of the refrigerating medium is-35 ℃ to 5 ℃, and the refrigerating medium is preferably 50% water glycol solution.
Furthermore, the working temperature range of the external heating medium is 20-100 ℃, and the waste heat of the engine cylinder sleeve water can be used as one of alternative heat sources to improve the resource utilization rate and save resources.
Further, the radiator is a water-cooling radiator or an air-cooling radiator.
The application also provides a cold energy utilization method for refrigerating the LNG power ship by using the system, which comprises the following steps:
s1, the liquefied natural gas in the storage tank is heated and gasified by the cold energy recovery heat exchanger and the natural gas heating heat exchanger under the action of the pressure in the tank, and then enters the buffer tank for the use of an engine;
s2, sequentially connecting the high-temperature cold storage tank, the first driving pump, the first hot end inlet, the first hot end outlet, the third valve and the low-temperature cold storage tank to form a cold energy recovery circulating system together, controlling the flow of the first driving pump to keep the temperature of the secondary refrigerant entering the low-temperature cold storage tank within a set temperature range, closing the third valve and opening the fourth valve when the liquid in the low-temperature cold storage tank is close to the control liquid level of the full bin, so that the secondary refrigerant directly flows into the high-temperature cold storage tank, and the liquid level safety of the low-temperature cold storage tank is ensured;
and S3, connecting the low-temperature cold storage tank with a second drive pump, connecting the low-temperature cold storage tank with a plurality of fifth valves and a first air-conditioning heat exchanger in parallel, connecting the low-temperature cold storage tank with the high-temperature cold storage tank in series after parallel connection and collection to form a cold energy utilization circulating system together, controlling the second drive pump to pump secondary refrigerant from the low-temperature cold storage tank, providing cold energy to a plurality of spaces through a plurality of fifth valves and the first air-conditioning heat exchanger which are parallel to each other, and returning the secondary refrigerant which completes heat exchange to the high-temperature cold storage tank.
Further, in step S2, the high temperature heat-storage tank contains a heat-storage substance therein, so that the internal temperature of the high temperature heat-storage tank is maintained at 0 ℃ ± 2 ℃;
in step S3, the low temperature heat-storage tank contains a heat-storage substance therein such that the internal temperature of the low temperature heat-storage tank is maintained at-20 ℃ ± 2 ℃.
Further, in step S3, the eighth valve, the refrigeration heat exchanger and the second air-conditioning heat exchanger are connected in parallel, and a compressor, a radiator and a throttle valve are installed between the second cold-end inlet and the second cold-end outlet of the refrigeration heat exchanger to form an additional refrigeration cycle, and the compressor pressurizes the refrigerant flowing out of the second cold-end outlet to 3-5MPa, and the refrigerant flows through the radiator and the throttle valve and returns to the refrigeration heat exchanger to provide the cold energy for refrigeration and the emergency standby cold source of the cold energy utilization system.
Has the advantages that: compared with the prior art, the cold energy utilization system for refrigerating the LNG power-driven ship and the method thereof are different in that the cold energy utilization system comprises a storage tank, a cold energy recovery heat exchanger, a heating heat exchanger and a buffer tank, wherein the buffer tank is connected with an engine through a pipeline, a high-temperature cold storage tank, a first driving pump, the cold energy recovery heat exchanger and a low-temperature cold storage tank are sequentially connected to form a cold energy recovery circulation system, the low-temperature cold storage tank, a second driving pump, a plurality of fifth valves are sequentially connected with a first air-conditioning heat exchanger and the high-temperature cold storage tank to form a cold energy utilization circulation system, the temperature of the secondary refrigerant entering the low-temperature cold storage tank is adjusted by adjusting the flow of the secondary refrigerant in the cold energy recovery circulating system, meanwhile, the function of cold storage substances in the cold storage tank is considered, so that the temperature of the secondary refrigerant in the low-temperature cold storage tank is always kept within a set temperature range for refrigerating the space where the plurality of first air-conditioning heat exchangers are located; in addition, the fluctuation of the load of the engine can be effectively balanced through the arrangement of the high-temperature cold storage tank and the low-temperature cold storage tank, the stability of cold supply is kept, and the cold supply can be continuously carried out when the engine stops running and the cold quantity is insufficient; the utilization rate of LNG gasification release cold energy is effectively improved while the power requirement of the engine is met, and the LNG gasification release cold energy can be used for ships to build large-scale cold storage and fresh keeping storehouses and also can be used for the ships to become professional cold storage and fresh keeping ships; the utilization system has the advantages of simple structure, convenient control, further simplification of system pipelines, convenient maintenance, reduction of daily maintenance cost and high safety; and the backup refrigeration measure can effectively deal with various emergency situations, and the method has very wide applicability.
Drawings
Fig. 1 is a schematic diagram of a cold energy utilization system for refrigeration of an LNG-powered ship according to a preferred embodiment of the present application.
The system comprises a storage tank 100, a low-temperature heat storage tank 210, a high-temperature heat storage tank 220, a cold energy recovery heat exchanger 31, a heating heat exchanger 32, a refrigerating heat exchanger 33, a radiator 45, a first driving pump 51, a second driving pump 52, a compressor 61, a throttle valve 62 and a buffer tank 700.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, the present application provides a cold energy utilization system for refrigeration of an LNG-powered ship and a method thereof, including an LNG storage tank 100, a cold energy recovery heat exchanger 31, a natural gas heating heat exchanger 32, and a buffer tank 700, wherein under the pressure inside the tank 100, enters the first cold side inlet 311 of the cold energy recovery heat exchanger 31 through a first line L1 and a first valve V1, the cold energy recovery heat exchanger 31 is used for carrying out sufficient heat exchange with the secondary refrigerant, the available cold energy of the LNG is recovered as much as possible, the temperature utilization interval of the LNG can reach-162 ℃ to 0 ℃, since the LNG is changed into a relatively high temperature gas (about 0 ℃) after passing through the cold energy recovery heat exchanger 31, according to the pressure change condition in the LNG storage tank 100, the first cold end outlet 312 of the cold energy recovery heat exchanger 31 may supplement gas into the storage tank 100 through the second line L2 and the second valve V2 to maintain the pressure in the storage tank 100 stable; after the LNG is changed into gas through the cold energy recovery heat exchanger 31, the temperature required by normal combustion of the engine still cannot be met, and the flow rate of the natural gas is greatly changed according to the change of the power of the engine, so that the first cold end outlet 312 of the cold energy recovery heat exchanger 31 is connected with the natural gas heating heat exchanger 32 through a third pipeline L3 to improve the temperature of the natural gas, the natural gas enters the buffer tank 700 through a fourth pipeline L4 after being heated, the pressure and the temperature of the natural gas for the engine are further stabilized, the heating heat exchanger 32 can be heated by using waste heat of cylinder liner water of the engine, the working temperature range is 20-100 ℃, resources can be effectively saved, and the cost is reduced;
the secondary refrigerant enters the cold energy recovery heat exchanger 31 from the outlet of the high-temperature heat-storage tank 220 through the first drive pump 51 to exchange heat with the LNG sufficiently, then enters the low-temperature heat-storage tank 210 through the first hot end outlet 314, the fifth pipeline L5 and the third valve V3 to form a complete cold energy recovery circulation system; in addition, when the liquid level in the low-temperature heat-storage tank 210 exceeds a set range, the third valve V3 can be closed, and the coolant in the cold energy recovery heat exchanger 31 directly enters the high-temperature heat-storage tank 220 through the first hot-end outlet 314 via the sixth pipeline L6 and the fourth valve V4, so that the liquid level of the coolant in the low-temperature heat-storage tank 210 can be effectively controlled;
the cold storage outlet of the low-temperature heat-storage tank 210 is connected with the first air-conditioning heat exchanger 41 through a ninth pipeline L9 and a fifth valve V5, connected with the first air-conditioning heat exchanger 42 through a tenth pipeline L10 and a fifth valve V6, and connected with the first air-conditioning heat exchanger 43 through an eleventh pipeline L11 and a fifth valve V7 respectively by the action of an eighth pipeline L8 and a second driving pump 52, and used for providing cold storage cold energy for a refrigerator where the three first air-conditioning heat exchangers (41, 42 and 43) are located, and after heat exchange is completed, the refrigerant of the three first air-conditioning heat exchangers (41, 42 and 43) returns to the high-temperature heat-storage tank 220 through a thirteenth pipeline L13, so that a cold energy utilization circulation system is completed.
Obviously, the number and the specification of the fifth valve and the first air-conditioning heat exchanger can be adjusted correspondingly according to the number of the cold storages and the size of the space volume in the ship, and the specific number and the specification size are not limited herein and are within the protection scope of the present application.
In the period, the secondary refrigerants used in the high-temperature cold storage tank 220, the low-temperature cold storage tank 210, the cold energy recovery circulation system and the cold energy utilization circulation system are the same secondary refrigerant, and the cold energy is basically and directly contained in the secondary refrigerant, so that the heat energy loss caused by heat exchange among different secondary refrigerants is avoided.
The same secondary refrigerant is selected from secondary refrigerants which have large specific heat capacity, high safety, no toxicity, no flammability and no explosion, the working temperature range of the selected secondary refrigerant is-60-10 ℃, the actual working temperature range is-35-5 ℃, and a 50% water glycol solution can be selected as one of the choices.
In order to ensure the emergency situation in practical application and the requirement of a large amount of refrigeration required by refrigeration, the second driving pump 52 is also connected with the second hot end inlet 333 of the refrigeration heat exchanger 33 through the twelfth pipeline L12 and the eighth valve V8, then the second hot end outlet 334 of the refrigeration heat exchanger 33 is connected with the second air-conditioning heat exchanger 44, through adding an additional refrigeration cycle, refrigeration capacity for refrigeration can be provided in the cold energy utilization circulation system, and as the secondary refrigerant refrigerated by the additional refrigeration cycle directly returns to the high-temperature cold storage tank 220, the refrigeration capacity for refrigeration can also adjust the temperature in the whole cold energy utilization system; the common refrigerant for the refrigeration house is used in the additional refrigeration cycle, the refrigerant is heated to be gaseous after heat exchange through the refrigeration heat exchanger 33, enters the compressor 61 from the second cold end outlet 332, is pressurized to 3-5MPa through the compressor 61, enters the radiator 45 for heat dissipation and cooling, then passes through the throttle valve 62, is cooled and depressurized through the expansion process, and finally returns to the refrigeration heat exchanger 33 from the second cold end inlet 331 to form a complete refrigeration cycle, and the radiator 45 can be completed in a water cooling or air cooling mode.
In the cold energy recovery circulation system, the flow rate of the secondary refrigerant flowing out of the high temperature cold storage tank 220 is continuously adjusted, so that the temperature of the secondary refrigerant flowing out of the cold energy recovery heat exchanger 31 is kept between-18 ℃ and-22 ℃, and the secondary refrigerant flows into the low temperature cold storage tank 210 to be used, in addition, when the liquid level of the secondary refrigerant in the low temperature cold storage tank 210 is higher and is close to full volume, the third valve V3 is closed, and the fourth valve V4 is opened, so that the secondary refrigerant flowing out of the cold energy recovery heat exchanger 31 does not flow into the low temperature cold storage tank 210 any more, but flows into the high temperature cold storage tank 220 completely, the safety of the liquid level of the secondary refrigerant in the high temperature cold storage tank 220 is ensured, the cold storage substance in the high temperature cold storage tank 220 is ice, and the temperature in the high temperature cold.
The above embodiments are merely preferred embodiments of the present disclosure, which are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present disclosure, should be included in the scope of the present disclosure.
Claims (10)
1. A cold energy utilization system for refrigerating an LNG power ship comprises an LNG storage tank, a cold energy recovery heat exchanger, a natural gas heating heat exchanger and a buffer tank, wherein the buffer tank is connected with an engine through a pipeline;
the cold energy recovery heat exchanger is also provided with a first hot end inlet and a first hot end outlet, the first hot end outlet is connected with the low-temperature heat storage tank through a third valve and is connected with the high-temperature heat storage tank through a fourth valve, and the high-temperature heat storage tank is connected with the first hot end inlet through a first driving pump to form a cold energy recovery circulation system;
the low-temperature cold storage tank is also provided with an outlet, the outlet is connected with a plurality of fifth valves arranged in parallel and a first air-conditioning heat exchanger through a second driving pump to provide cold energy for refrigeration, and a plurality of secondary refrigerant outlets of the first air-conditioning heat exchanger are connected with the high-temperature cold storage tank to form a cold energy utilization circulating system.
2. A cold energy utilization system for refrigeration of an LNG-powered vessel as claimed in claim 1, wherein the first cold end outlet is further connected to the gas phase space of the storage tank via a second valve.
3. The LNG-powered cold energy utilization system for refrigerating a ship according to claim 1, wherein the second drive pump is further connected to a second air-conditioning heat exchanger through an eighth valve and a refrigeration heat exchanger in sequence, and a secondary refrigerant outlet of the second air-conditioning heat exchanger is connected to the high-temperature heat-storage tank;
the refrigeration heat exchanger is provided with a second cold end inlet, a second cold end outlet, a second hot end inlet and a second hot end outlet, the eighth valve is connected with the second hot end inlet, the second hot end outlet is connected with the second air-conditioning heat exchanger, the second cold end outlet is connected with a radiator through a compressor, and the radiator is connected with the second cold end inlet through a throttle valve to form additional refrigeration circulation.
4. The LNG-powered ship refrigeration cold energy utilization system of claim 1, wherein the coolant in the low-temperature heat-storage tank, the high-temperature heat-storage tank, the cold energy recovery cycle system, and the cold energy utilization cycle system is the same coolant.
5. The LNG-powered vessel cold storage cold energy utilization system of claim 4, wherein the coolant has an operating temperature range of-35 ℃ to 5 ℃.
6. The cold energy utilization system for refrigeration of LNG-powered vessels as claimed in claim 1, wherein the working temperature of the external heating medium is in the range of 20 ℃ to 100 ℃, preferably waste heat of engine cylinder liner water.
7. The LNG-powered ship refrigeration cold energy utilization system of claim 3, wherein the radiator is a water-cooled radiator or an air-cooled radiator.
8. A method of using cold energy for refrigeration of an LNG-powered vessel using the system of any one of claims 1 to 7, comprising the steps of:
s1, the liquefied natural gas in the storage tank is heated and gasified by the cold energy recovery heat exchanger and the natural gas heating heat exchanger under the action of the pressure in the tank, and then enters the buffer tank for the use of an engine;
s2, sequentially connecting the high-temperature cold storage tank, the first driving pump, the first hot end inlet, the first hot end outlet, the third valve and the low-temperature cold storage tank to form a cold energy recovery circulating system together, controlling the flow of the first driving pump to keep the temperature of the secondary refrigerant entering the low-temperature cold storage tank within a set temperature range, closing the third valve and opening the fourth valve when the liquid in the low-temperature cold storage tank is close to the control liquid level of the full bin, so that the secondary refrigerant directly flows into the high-temperature cold storage tank, and the liquid level safety of the low-temperature cold storage tank is ensured;
and S3, connecting the low-temperature cold storage tank with a second drive pump, then connecting the low-temperature cold storage tank with a plurality of fifth valves and a first air-conditioning heat exchanger in parallel, connecting the low-temperature cold storage tank with the high-temperature cold storage tank after parallel connection and collection to jointly form a cold energy utilization circulating system, controlling the second drive pump to extract secondary refrigerant from the low-temperature cold storage tank, providing cold energy to a plurality of spaces through a plurality of fifth valves and the first air-conditioning heat exchanger which are parallel to each other, and returning the secondary refrigerant which completes heat exchange to the high-temperature cold storage tank.
9. The cold energy utilization method for refrigerating an LNG-powered ship according to claim 8, wherein in step S2, the high temperature heat-storage tank contains a cold-storage substance therein such that the internal temperature of the high temperature heat-storage tank is maintained at 0 ℃ ± 2 ℃;
in step S3, the low temperature heat-storage tank contains a heat-storage substance therein such that the internal temperature of the low temperature heat-storage tank is maintained at-20 ℃ ± 2 ℃.
10. The method of claim 8, wherein in step S3, the eighth valve, the refrigeration heat exchanger and the second air-conditioned heat exchanger are connected in parallel, and a compressor, a radiator and a throttle valve are sequentially installed between the second cold-end inlet and the second cold-end outlet of the refrigeration heat exchanger to form an additional refrigeration cycle, wherein the compressor pressurizes the refrigerant flowing out of the second cold-end outlet to 3-5MPa, and the refrigerant flows through the radiator and the throttle valve and returns to the refrigeration heat exchanger to provide the refrigeration energy and the emergency backup cold source of the refrigeration energy utilization system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010299913.3A CN111366024A (en) | 2020-04-16 | 2020-04-16 | Cold energy utilization system and method for refrigeration of LNG (liquefied Natural gas) power ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010299913.3A CN111366024A (en) | 2020-04-16 | 2020-04-16 | Cold energy utilization system and method for refrigeration of LNG (liquefied Natural gas) power ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111366024A true CN111366024A (en) | 2020-07-03 |
Family
ID=71209549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010299913.3A Pending CN111366024A (en) | 2020-04-16 | 2020-04-16 | Cold energy utilization system and method for refrigeration of LNG (liquefied Natural gas) power ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111366024A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2020
- 2020-04-16 CN CN202010299913.3A patent/CN111366024A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104748280B (en) | A kind of LNG Power Vessels air conditioner refrigerating/heating system | |
| CN102889752B (en) | Methane-rich gas liquefying device provided with ammonia absorption type refrigerator for precooling and methane-rich gas liquefying technology | |
| CN201104041Y (en) | Large temperature difference low-temperature water supply units | |
| CN208520077U (en) | A kind of marine vehicle cool house and air-conditioner control system using LNG cold energy | |
| CN103090591A (en) | Cold and hot internal balance system for combined use of lithium bromide unit and refrigeration storage | |
| CN101306659A (en) | Environment protection type refrigerated truck | |
| JP7134688B2 (en) | Intercooled turbine with heat storage system | |
| KR102207200B1 (en) | Power generation efficiency improvement system through temperature control of intake air of turbine | |
| CA2412160C (en) | Method and apparatus for cooling the inlet air of combustion turbines | |
| CN204555150U (en) | A kind of LNG Power Vessel air conditioner refrigerating/heating system | |
| AU2001275254A1 (en) | Method and apparatus for cooling the inlet air of combustion turbines | |
| CN111605667A (en) | Multi-energy complementary ship cold and hot water system | |
| CN205505271U (en) | Vaporization of marine LNG and air conditioner integrated system | |
| CN111409809A (en) | Comprehensive system and method for keeping freshness of ships using L NG power and cold energy | |
| CN111366024A (en) | Cold energy utilization system and method for refrigeration of LNG (liquefied Natural gas) power ship | |
| CN107202452A (en) | A kind of LNG vaporization of LNG power fishing boat and refrigeration system and its method of work | |
| CN212125489U (en) | Ship LNG power and cold energy fresh-keeping integrated system | |
| CN212253784U (en) | Cold energy utilization system for refrigeration of LNG (liquefied Natural gas) power ship | |
| CN103884130B (en) | Ship refrigerator system capable of absorbing waste heat to assist in refrigeration | |
| CN110360441B (en) | Exhaust cold energy utilization system of space liquid hydrogen storage tank | |
| JP2000018049A (en) | Cooling system for combustion air gas turbine and cooling method | |
| CN209279430U (en) | A kind of refrigeration equipment producing liquefied natural gas | |
| CN105716183A (en) | Ship LNG vaporization and air conditioner integrated system and control method | |
| CN203824151U (en) | LNG (liquefied natural gas) cold energy utilization device of LNG power driving vessel | |
| CN105275662A (en) | Closed circulating system suitable for aerospace engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |