A cooling system

Abstract

The present application relates to the technical field of cooling, and provides a cooling system.The cooling system comprises an FLNG platform cold energy carrying device, a refrigerant generating module, a cold energy recovery module and a cold carrier circulating module, the FLNG platform cold energy carrying device and the refrigerant generating module are communicated with the cold energy recovery module, the cold energy recovery module is used for attaching cold energy to the refrigerant to form a cold carrier; the FLNG platform cold energy carrying device is used for providing cold energy; the refrigerant generating module is used for generating refrigerant; the cold carrier circulating module is communicated with the cold energy recovery module, and the cold carrier circulating module is used for circulating the cold carrier between a to-be-cooled equipment heat exchanger and the cold energy recovery module.The present application solves the defects in the prior art that the cold energy of LNG in the gasification process is not only not utilized, but also causes potential threats to the surrounding air and the marine environment, and realizes a cooling system capable of recycling and utilizing the cold energy of LNG in the gasification process.

Description

Technical Field

[0001] This invention relates to the field of cooling technology, and more particularly to a cooling system. Background Technology

[0002] LNG (liquefied natural gas) on FLNG (floating liquefied natural gas) platforms is a cryogenic liquid clean energy source, and its gasification process releases a large amount of cold energy. LNG gasification primarily uses seawater or air as a heat source, while a heater serves as a supplementary heat source for regasification. LNG absorbs heat from seawater or air, releasing cold energy back to the seawater or air, thus gasifying into combustible natural gas. However, the cold energy released during LNG gasification is not only unutilized but also poses a potential threat to the surrounding air and marine environment. Therefore, to better utilize the cold energy of LNG during gasification, it is necessary to design a cooling system. Summary of the Invention

[0003] This invention provides a cooling system to address the shortcomings of existing technologies where the cold energy generated during the vaporization process of LNG is not only not utilized but also poses a potential threat to the surrounding air and marine environment. The invention provides a cooling system capable of recovering and utilizing the cold energy generated during the vaporization process of LNG.

[0004] This invention provides a cooling system comprising:

[0005] The FLNG platform's cold energy support unit is used to provide cold energy;

[0006] Refrigerant generation module, used to generate refrigerant;

[0007] The cold energy recovery module is connected to both the FLNG platform cold energy carrying device and the refrigerant generation module. The cold energy recovery module is used to attach the cold energy to the refrigerant to form a cooling medium.

[0008] A refrigerant circulation module is connected to the cold energy recovery module, and the refrigerant circulation module is used to circulate the refrigerant between the heat exchanger of the equipment to be cooled and the cold energy recovery module.

[0009] According to a cooling system provided by the present invention, the refrigerant generation module includes:

[0010] A refrigerant forming pipeline is provided, with an air pump connected to the inlet end of the refrigerant forming pipeline and the outlet end of the refrigerant forming pipeline connected to the cold energy recovery module.

[0011] A compressor, connected to the refrigerant forming pipeline, is used to compress air entering the refrigerant forming pipeline;

[0012] A nitrogen separation device is connected to the refrigerant forming pipeline and located between the compressor and the cold energy recovery module, for separating nitrogen from the air.

[0013] According to a cooling system provided by the present invention, the cold energy recovery module includes:

[0014] The cold energy input heat exchanger is connected to the cold energy carrying device of the FLNG platform and the refrigerant generation module. The cold energy input heat exchanger is used to attach the cold energy to the refrigerant to form a coolant.

[0015] A refrigerant storage tank, connected to the cold energy input heat exchanger, is used for storing the refrigerant;

[0016] The circulating refrigeration unit is connected to the refrigerant storage tank and the refrigerant circulation module, and is used to further cool the refrigerant.

[0017] According to a cooling system provided by the present invention, the circulating refrigeration unit includes:

[0018] The first circulation pipeline has its inlet and outlet ends both connected to the refrigerant storage tank.

[0019] A cold energy recovery heat exchanger is installed in the first circulation pipeline and connected to the cold energy carrying device of the FLNG platform. The cold energy recovery heat exchanger is used to further cool the refrigerant inside the refrigerant storage tank.

[0020] A first circulation pump is installed in the first circulation pipeline for circulating the refrigerant inside the first circulation pipeline.

[0021] According to a cooling system provided by the present invention, the refrigerant circulation module includes:

[0022] The second circulation pipeline is connected at one end to the outlet of the cold energy recovery heat exchanger and at the other end to the inlet of the cold energy input heat exchanger.

[0023] A cold energy output heat exchanger is installed in the second circulation pipeline and is used to regulate the temperature of the refrigerant.

[0024] A second circulation pump is provided in the second circulation pipeline for circulating the refrigerant within the second circulation pipeline.

[0025] According to a cooling system provided by the present invention, both the cold energy input heat exchanger and the cold energy recovery heat exchanger are connected to the FLNG platform cold energy carrying device through a cold energy transmission pipeline, and a first valve is provided on the cold energy transmission pipeline.

[0026] According to a cooling system provided by the present invention, a second valve is provided between the nitrogen separation device and the cold energy input heat exchanger.

[0027] According to a cooling system provided by the present invention, a third valve is provided between the refrigerant storage tank and the cold energy recovery heat exchanger.

[0028] According to a cooling system provided by the present invention, a fourth valve is provided between the cold energy recovery heat exchanger and the first circulating pump.

[0029] According to a cooling system provided by the present invention, a control module is further included. The FLNG platform cold energy carrying device, the refrigerant generation module, the cold energy recovery module, and the refrigerant circulation module are all signal-connected to the control module. The control module is used to control the operation of the FLNG platform cold energy carrying device, the refrigerant generation module, the cold energy recovery module, and the refrigerant circulation module.

[0030] The cooling system provided by this invention fully utilizes the cold energy released during the LNG vaporization process on the FLNG platform, improving energy efficiency and reducing the potential threat of cold energy emissions to the surrounding air and marine environment. This invention can also provide cooling for other equipment on the FLNG platform, further reducing platform energy consumption and improving overall operational efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the cooling system provided by the present invention.

[0033] Reference numerals: 100: FLNG platform cold energy carrying device; 110: Cold energy transmission pipeline; 120: First valve;

[0034] 200: Refrigerant generation module; 210: Refrigerant formation pipeline; 220: Compressor; 230: Nitrogen separation device; 240: Second valve;

[0035] 300: Cold energy recovery module; 310: Cold energy input heat exchanger; 320: Refrigerant storage tank; 330: First circulation pipeline; 340: Third valve; 350: Cold energy recovery heat exchanger; 360: Fourth valve; 370: First circulation pump;

[0036] 400: Refrigerant circulation module; 410: Cold energy output heat exchanger; 420: Second circulation pipeline; 430: Second circulation pump;

[0037] 500: Control module;

[0038] 600: Heat exchanger of equipment to be cooled. Detailed Implementation

[0039] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0040] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0042] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] The following is combined Figure 1 Describe the cooling system provided by the present invention.

[0045] Reference Figure 1 The present invention provides a cooling system comprising an FLNG platform cold energy carrying device 100, a refrigerant generation module 200, a cold energy recovery module 300, and a refrigerant circulation module 400. The FLNG platform cold energy carrying device 100 and the refrigerant generation module 200 are both connected to the cold energy recovery module 300. The FLNG platform cold energy carrying device 100 is used to provide cold energy; the refrigerant generation module 200 is used to generate refrigerant; the cold energy recovery module 300 is used to attach cold energy to the refrigerant to form a refrigerant; the refrigerant circulation module 400 is connected to the cold energy recovery module 300, and the refrigerant circulation module 400 is used to circulate the refrigerant between the heat exchanger 600 of the equipment to be cooled and the cold energy recovery module 300.

[0046] In this embodiment, the FLNG platform cold energy carrying device 100 can specifically be an FLNG platform gasification device, which is the starting point of the entire system. It can guide the waste cold energy during the vaporization and heating of liquefied natural gas to the cold energy recovery module 300 through pipelines or other transportation methods. The refrigerant generation module 200 is responsible for generating refrigerant, which is a medium that can operate at lower temperatures and effectively absorb cold energy.

[0047] Once the cold energy and refrigerant are delivered to the cold energy recovery module 300, the latter combines the cold energy provided by the FLNG platform's cold energy carrying device 100 with the refrigerant generated by the refrigerant generation module 200. Through a heat exchange process, the cold energy is attached to the refrigerant to form a cooling medium. This process not only effectively recovers the cold energy released during LNG vaporization but also transforms it into a form that can be transmitted and utilized.

[0048] The refrigerant circulation module 400 is connected to the cold energy recovery module 300, allowing the generated refrigerant to circulate between the equipment to be cooled and the cold energy recovery module 300. During the circulation process, the refrigerant transfers cooling energy to the equipment requiring cooling, such as air conditioning systems, refrigeration equipment, or other industrial cooling applications. When the refrigerant releases its cooling energy, it returns to the cold energy recovery module 300 to absorb cooling energy again, forming a continuous circulation process.

[0049] Through the above design, this invention fully utilizes the cold energy released during the LNG vaporization process on the FLNG platform, not only improving energy efficiency but also reducing the potential threat of cold energy emissions to the surrounding air and marine environment. This invention can also provide cooling for other equipment on the FLNG platform, further reducing platform energy consumption and improving overall operational efficiency.

[0050] Secondly, the present invention utilizes the cold energy resources on the FLNG platform to recover, store, and reuse the high-quality cold energy released during the gasification of liquid fuel in the cooling circulation system of the upper module of the FLNG platform. This system can operate under different working conditions of the upper module of the FLNG platform, effectively reducing the amount of seawater used during the operation of the FLNG platform, reducing the total fuel consumption, improving the energy efficiency index of the FLNG platform, reducing the dependence of traditional seawater cooling systems on external energy, and improving economic efficiency.

[0051] Furthermore, the primary energy source for the FLNG platform's cold energy carrying device 100 is derived from the natural cryogenic cooling of LNG, eliminating the need for high-power equipment. This fully utilizes the LNG's cold energy without incurring excessive additional energy consumption, demonstrating strong application prospects. The low temperature generated by this invention replaces the conventional method of cooling equipment on the FLNG platform using a seawater circulation system, overcoming the temperature difference limitations of conventional cooling circulation devices. It can continuously provide a low-temperature cooling cycle, saving daily operating costs and creating certain economic value. While fully utilizing the LNG's cold energy without incurring excessive additional energy consumption, it also reduces the impact of the cooling process on the marine environment, meeting environmental protection and energy conservation requirements. This has significance for energy saving, water conservation, carbon emission reduction, and comprehensive utilization of energy resources.

[0052] It should be noted that the main function of the refrigerant is to carry the cold energy from the LNG to the cold energy recovery module 300. During operation, the refrigerant maintains a phase-change-free operation, meaning it remains liquid and does not vaporize; the cold energy is provided by the sensible heat of the refrigerant. Ideally, the refrigerant should have a large heat of melting and vaporization to reduce the amount of refrigerant used. To fully utilize the heat exchanger's efficiency, the refrigerant needs high thermal conductivity. Simultaneously, the refrigerant should have good chemical stability, not combining or decomposing at any temperature and pressure, and should not corrode metals, ensuring the long-term use of pipelines and equipment. An ideal refrigerant should not pose a risk of explosion or combustion. It should be easy to produce, readily available, and inexpensive. It should ensure that it does not solidify and block pipelines during heat exchange with LNG; that is, the working freezing point of the refrigerant should not be significantly higher than the LNG temperature. Liquid nitrogen produced through the above recovery system can meet these functional requirements. Specifically, the refrigerant can be liquid nitrogen.

[0053] Reference Figure 1 In some embodiments of the present invention, the refrigerant generation module 200 includes a refrigerant forming pipeline 210, a compressor 220, and a nitrogen separation device 230. The inlet end of the refrigerant forming pipeline 210 is connected to an air pump, and the outlet end of the refrigerant forming pipeline 210 is connected to the cold energy recovery module 300. The compressor 220 is connected to the refrigerant forming pipeline 210 and is used to compress the air entering the refrigerant forming pipeline 210. The nitrogen separation device 230 is connected to the refrigerant forming pipeline 210 and is located between the compressor 220 and the cold energy recovery module 300, and is used to separate nitrogen from the air.

[0054] In the above structure, after the air pump introduces outside air into the refrigerant pipeline, the compressor 220 starts working, compressing the air in the pipeline and increasing its pressure and temperature. The high-pressure air then enters the nitrogen separation device 230, where nitrogen is separated from the air through physical or chemical methods (such as cryogenic separation, membrane separation, etc.). The separated nitrogen enters the cold energy recovery module 300, where it exchanges heat with the cold energy provided by the FLNG platform cold energy carrying device 100 to form a refrigerant, namely liquid nitrogen.

[0055] In the aforementioned structure, the refrigerant generation module 200 not only efficiently generates high-purity liquid nitrogen as a refrigerant but also ensures the purity and performance of the refrigerant. The generated liquid nitrogen combines with the cold energy released during LNG vaporization in the cold energy recovery module 300 to form a refrigerant, thereby effectively utilizing this cold energy and improving the overall system's energy efficiency. Simultaneously, by separating nitrogen from the air, the impact of other gaseous components on refrigerant performance is reduced, ensuring the stability and effectiveness of the refrigerant during cold energy recovery. This efficient refrigerant generation and cold energy recovery mechanism not only helps reduce the waste of cold energy during LNG vaporization but also provides a reliable source of cooling for other equipment on the FLNG platform, further improving the platform's operational efficiency and environmental friendliness.

[0056] Reference Figure 1 In some embodiments of the present invention, the cold energy recovery module 300 includes a cold energy input heat exchanger 310, a refrigerant storage tank 320, and a circulating refrigeration unit. The cold energy input heat exchanger 310 is connected to the FLNG platform cold energy carrying device 100 and the refrigerant generation module 200, and is used to attach cold energy to the refrigerant to form a coolant. When the refrigerant is nitrogen, the cold energy input heat exchanger 310 liquefies the nitrogen by utilizing cold energy. The refrigerant storage tank 320 is connected to the cold energy input heat exchanger 310 and is used for storing the coolant. The circulating refrigeration unit is connected to the refrigerant storage tank 320 and the coolant circulation module 400, and is used to further cool the coolant.

[0057] Specifically, the cold energy input heat exchanger 310 has three inlets and one outlet. The three inlets are respectively connected to the outlet of the refrigerant forming pipeline 210, the FLNG platform cold energy carrying device 100, and the refrigerant circulation module 400. The outlet of the cold energy input heat exchanger 310 is connected to the inlet of the refrigerant storage tank 320. The refrigerant storage tank 320 has two inlets and one outlet. One inlet is connected to the cold energy input heat exchanger 310, and the other inlet is connected to the outlet of the circulating refrigeration unit. The outlet of the refrigerant storage tank 320 is connected to the inlet of the circulating refrigeration unit. It can be understood that the circulating refrigeration unit is a closed loop structure.

[0058] In this embodiment, the cold energy input heat exchanger 310 is the core component of the cold energy recovery module 300, and it is connected to the FLNG platform cold energy carrying device 100 and the refrigerant generation module 200. The cold energy provided by the FLNG platform cold energy carrying device 100 is transported to the cold energy input heat exchanger 310 through pipelines. Simultaneously, nitrogen generated by the refrigerant generation module 200 is also sent to the cold energy input heat exchanger 310. In the cold energy input heat exchanger 310, the cold energy is transferred to the nitrogen through a heat exchange process, causing the nitrogen to cool and liquefy, forming a refrigerant. This process not only effectively utilizes the cold energy released during LNG vaporization but also generates high-purity liquid nitrogen as a refrigerant.

[0059] The generated refrigerant (liquid nitrogen) is piped to a refrigerant storage tank 320 for storage. The refrigerant storage tank 320 is connected to a cold energy input heat exchanger 310, and its design ensures stable storage of liquid nitrogen in cryogenic environments, preventing evaporation loss. By storing the refrigerant in the refrigerant storage tank 320, cooling capacity can be supplied at any time when needed, improving the system's flexibility and reliability.

[0060] The circulating refrigeration unit is connected to the refrigerant storage tank 320 and the refrigerant circulation module 400, and its main function is to further cool the refrigerant. In some applications, it may be necessary to cool the refrigerant to a lower temperature to meet specific cooling requirements. The circulating refrigeration unit cools the refrigerant to the required temperature through the FLNG platform's cold energy carrying device 100, and then delivers the cooled refrigerant to the equipment to be cooled through the refrigerant circulation module 400, providing the required cooling capacity.

[0061] With this design, the cold energy recovery module 300 in this embodiment can not only efficiently utilize the cold energy released during LNG gasification to generate high-purity liquid nitrogen as a refrigerant, but also ensure the stable storage and further cooling of the refrigerant, providing a reliable source of cooling for other equipment on the FLNG platform.

[0062] In some possible embodiments, the design of the refrigerant storage tank 320 requires consideration of several aspects. First, materials capable of maintaining good mechanical properties at extremely low temperatures must be selected, specifically stainless steel (such as 304L and 316L), aluminum alloys, and certain special alloys. These materials exhibit good toughness and crack resistance at low temperatures. Second, the refrigerant storage tank can employ a double-layer structure, with an inner layer for storing liquid nitrogen and an outer layer for providing thermal insulation. The space between the two layers needs to be filled with highly efficient insulation materials, such as perlite, polyurethane foam, or vacuum insulation panels (VIPs), to minimize cold loss and prevent the ingress of external heat. The tank also features a robust support structure to withstand the weight of the liquid nitrogen and the loads from the external environment.

[0063] In other possible embodiments, a pressure relief valve, a liquid level monitor, and a temperature monitor can be installed on the tank. The pressure relief valve prevents excessive pressure due to temperature changes or unexpected events. The design of the pressure relief valve should ensure rapid pressure release when necessary to prevent tank rupture. The liquid level monitor can monitor the liquid nitrogen storage level in real time, preventing overfilling or emptying. The liquid level sensor should be able to operate normally in cryogenic environments. Temperature monitoring can promptly detect insulation material failure or cold loss, ensuring the safe operation of the system.

[0064] Reference Figure 1 In some embodiments of the present invention, the circulating refrigeration unit includes a first circulating pipeline 330, a cold energy recovery heat exchanger 350, and a first circulating pump 370. The inlet and outlet ends of the first circulating pipeline 330 are both connected to the refrigerant storage tank 320. The cold energy recovery heat exchanger 350 is located in the first circulating pipeline 330 and is connected to the FLNG platform cold energy carrying device 100. The cold energy recovery heat exchanger 350 is used to further cool the refrigerant inside the refrigerant storage tank 320. The first circulating pump 370 is located in the first circulating pipeline 330 and is used for circulating the refrigerant inside the first circulating pipeline 330.

[0065] In the above structure, both the inlet and outlet ends of the first circulation pipeline 330 are connected to the refrigerant storage tank 320, forming a closed-loop circulation system. The main function of the first circulation pump 370 located in the first circulation pipeline 330 is to drive the circulation of the refrigerant inside the first circulation pipeline 330. Driven by the first circulation pump 370, the refrigerant flows continuously in the first circulation pipeline 330, ensuring that the heat exchange process in the cold energy recovery heat exchanger 350 continues.

[0066] In practical applications, the refrigerant (such as liquid nitrogen) inside the refrigerant storage tank 320 is drawn out through the inlet of the first circulation pipeline 330 and enters the first circulation pipeline 330, subsequently reaching the cold energy recovery heat exchanger 350. The heat exchanger utilizes the cold energy provided by the FLNG platform's cold energy carrying device 100 to further cool the refrigerant in the first circulation pipeline 330. During this process, cold energy is transferred to the refrigerant through heat exchange, further reducing the refrigerant's temperature and thus improving its cooling capacity.

[0067] Through this design, the embodiments of the present invention can not only further cool the refrigerant inside the refrigerant storage tank 320, improving its cooling capacity, but also ensure a continuous supply of cooling capacity. The combination of the first circulation pipeline 330 and the cold energy recovery heat exchanger 350 makes the utilization of cold energy more efficient and reduces the waste of cold energy. The use of the first circulation pump 370 ensures the stable circulation of the refrigerant in the system, improving the reliability and efficiency of the entire system.

[0068] Reference Figure 1In some embodiments of the present invention, the refrigerant circulation module 400 includes a cold energy output heat exchanger 410, a second circulation pipeline 420, and a second circulation pump 430. One end of the second circulation pipeline 420 is connected to the outlet of the cold energy recovery heat exchanger 350, and the other end is connected to the inlet of the cold energy input heat exchanger 310. The cold energy output heat exchanger 410 is connected to the second circulation pipeline 420 for regulating the temperature of the refrigerant. The second circulation pump 430 is connected to the second circulation pipeline 420 for circulating the refrigerant within the second circulation pipeline 420. The heat exchanger 600 for the equipment to be cooled is also connected to the second circulation pipeline 420 and is located between the cold energy output heat exchanger 410 and the cold energy input heat exchanger 310.

[0069] In the above structure, the second circulation pump 430 pumps further cooled refrigerant (such as liquid nitrogen) into the second circulation pipeline 420. The refrigerant in the second circulation pipeline 420 then flows through the cold energy output heat exchanger 410, which regulates the temperature of the refrigerant to ensure that its temperature meets the requirements of the equipment to be cooled. Through the cold energy output heat exchanger 410, the temperature of the refrigerant can be precisely controlled to meet different cooling needs. When the refrigerant flows through the heat exchanger 600 of the equipment to be cooled, the cooling capacity of the refrigerant is transferred to the equipment that needs to be cooled through a heat exchange process, thereby cooling the equipment. After heat exchange, the temperature of the refrigerant rises, and then it continues to flow along the second circulation pipeline 420 into the cold energy input heat exchanger 310. Since the cold energy input heat exchanger 310 is connected to the FLNG platform cold energy carrying device 100, through heat exchange, the cold energy provided by the FLNG platform cold energy carrying device 100 is transferred to the refrigerant, causing the temperature of the refrigerant to drop again and restoring its cooling capacity. The refrigerant that has passed through the cold energy input heat exchanger 310 returns to the starting point of the second circulation line 420, ready for the next cycle.

[0070] Reference Figure 1 In some embodiments of the present invention, the present invention further includes a control module 500. The FLNG platform cold energy carrying device 100, refrigerant generation module 200, cold energy recovery module 300 and refrigerant circulation module 400 are all signal-connected to the control module 500. The control module 500 is used to control the operation of the FLNG platform cold energy carrying device 100, refrigerant generation module 200, cold energy recovery module 300 and refrigerant circulation module 400.

[0071] Both the cold energy input heat exchanger 310 and the cold energy recovery heat exchanger 350 are connected to the FLNG platform cold energy carrying device 100 via the cold energy delivery pipeline 110, which is equipped with a first valve 120. A second valve 240 connects the nitrogen separation device 230 to the cold energy input heat exchanger 310. A third valve 340 connects the refrigerant storage tank 320 to the cold energy recovery heat exchanger 350. A fourth valve 360 ​​connects the cold energy recovery heat exchanger 350 to the first circulating pump 370. Specifically, the control module 500 is signal-connected to the first valve 120, the second valve 240, the third valve 340, and the fourth valve 360 ​​to control their operation, ensuring the safe and stable operation of the invention.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cooling system, characterized in that, include: FLNG platform cold energy carrier (100) is used to provide cold energy; A refrigerant generation module (200) is used to generate refrigerant; The cold energy recovery module (300) is connected to both the FLNG platform cold energy carrying device (100) and the refrigerant generation module (200). The cold energy recovery module (300) is used to attach the cold energy to the refrigerant to form a refrigerant. The refrigerant circulation module (400) is connected to the cold energy recovery module (300). The refrigerant circulation module (400) is used to circulate the refrigerant between the heat exchanger (600) of the equipment to be cooled and the cold energy recovery module (300). The refrigerant generation module (200) includes: A refrigerant forming pipeline (210) is provided, with an air pump connected to the inlet end of the refrigerant forming pipeline (210) and the outlet end of the refrigerant forming pipeline (210) connected to the cold energy recovery module (300). A compressor (220) is connected to the refrigerant forming pipeline (210) and is used to compress the air entering the refrigerant forming pipeline (210); A nitrogen separation device (230) is connected to the refrigerant forming pipeline (210) and located between the compressor (220) and the cold energy recovery module (300) for separating nitrogen from the air; The cold energy recovery module (300) includes: The cold energy input heat exchanger (310) is connected to the FLNG platform cold energy carrying device (100) and the refrigerant generation module (200). The cold energy input heat exchanger (310) is used to attach the cold energy to the refrigerant to form a coolant. A refrigerant storage tank (320) is connected to the cold energy input heat exchanger (310) and is used for storing the refrigerant; A circulating refrigeration unit is connected to the refrigerant storage tank (320) and the refrigerant circulation module (400) for further cooling the refrigerant; The circulating refrigeration unit includes: The first circulation pipeline (330) has its inlet and outlet ends connected to the refrigerant storage tank (320); A cold energy recovery heat exchanger (350) is installed in the first circulation pipeline (330) and connected to the FLNG platform cold energy carrying device (100). The cold energy recovery heat exchanger (350) is used to further cool the refrigerant inside the refrigerant storage tank (320). A first circulation pump (370) is provided in the first circulation pipeline (330) for circulating the refrigerant inside the first circulation pipeline (330); The refrigerant circulation module (400) includes: The second circulation pipeline (420) is connected at one end to the outlet of the cold energy recovery heat exchanger (350) and at the other end to the inlet of the cold energy input heat exchanger (310). A cold energy output heat exchanger (410) is provided in the second circulation pipeline (420) for adjusting the temperature of the refrigerant; A second circulation pump (430) is provided in the second circulation line (420) for circulating the refrigerant within the second circulation line (420).

2. The cooling system according to claim 1, characterized in that, The cold energy input heat exchanger (310) and the cold energy recovery heat exchanger (350) are both connected to the FLNG platform cold energy carrying device (100) through the cold energy transmission pipeline (110), and the cold energy transmission pipeline (110) is equipped with a first valve (120).

3. The cooling system according to claim 1, characterized in that, A second valve (240) is provided between the nitrogen separation device (230) and the cold energy input heat exchanger (310).

4. The cooling system according to claim 1, characterized in that, A third valve (340) is provided between the refrigerant storage tank (320) and the cold energy recovery heat exchanger (350).

5. The cooling system according to claim 1, characterized in that, A fourth valve (360) is provided between the cold energy recovery heat exchanger (350) and the first circulating pump (370).

6. The cooling system according to any one of claims 1-5, characterized in that, It also includes a control module (500), wherein the FLNG platform cold energy carrying device (100), the refrigerant generation module (200), the cold energy recovery module (300) and the refrigerant circulation module (400) are all connected to the control module (500) by signal. The control module (500) is used to control the operation of the FLNG platform cold energy carrying device (100), the refrigerant generation module (200), the cold energy recovery module (300) and the refrigerant circulation module (400).

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