Thermal management system of organic liquid hydrogen storage device

Abstract

The invention belongs to the technical field of hydrogen storage devices, and discloses an organic liquid hydrogen storage device heat management system which comprises an organic liquid loop and a heat management module, the organic liquid loop comprises a hydrogen charging tank and a hydrogen discharging tank, a first heat exchange channel is arranged in the hydrogen charging tank, and a second heat exchange channel is arranged in the hydrogen discharging tank; the first heat exchange channel and the second heat exchange channel are connected end to end through the heat management module and form a cooling liquid loop for cooling liquid to flow circularly, and the heat management module comprises a steam-water separator, a steam compressor and a heat storage assembly. The steam-water separator, the steam compressor and the heat storage assembly are sequentially connected between the output end of the first heat exchange channel and the input end of the second heat exchange channel in series so as to heat cooling liquid entering the second heat exchange channel. By arranging the steam compressor and the heat storage assembly, reaction heat in the hydrogen charging process is recycled through the steam compressor and acts on the subsequent hydrogen discharging process, the overall energy consumption of the machine liquid hydrogen storage system is reduced, and the economical efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of hydrogen storage device technology, and in particular to a thermal management system for an organic liquid hydrogen storage device. Background Technology

[0002] Organic liquid hydrogen storage is a novel and highly efficient hydrogen storage technology. It primarily utilizes the reversible hydrogenation / dehydrogenation reaction between unsaturated organic compounds (such as toluene, dibenzyltoluene, and N-ethylcarbazole) and hydrogen to store and release hydrogen energy. During hydrogen charging, the unsaturated organic compounds (hydrogen-lean liquid) react with hydrogen under the action of a catalyst to generate saturated hydrogenated organic compounds (hydrogen-rich liquid), fixing the hydrogen in the liquid carrier through chemical bonds. At this point, the breaking of numerous chemical bonds in the hydrogen-lean liquid releases a large amount of heat. To maintain the normal operation of the charging reaction, cooling water is needed to absorb and remove the heat from the hydrogen storage tank, keeping the temperature inside the tank at a relatively low and constant level. During hydrogen release, the hydrogenated organic compounds (hydrogen-rich liquid) react in reverse under the action of a catalyst, releasing hydrogen and reverting to the original unsaturated organic compounds (hydrogen-lean liquid). This process requires replenishing heat to the hydrogen release tank to maintain a relatively high and constant temperature, allowing the hydrogen release reaction to continue. In actual production, the reaction heat temperature of the hydrogen charging process is too low to meet the heat requirements of the hydrogen release process. Therefore, current organic liquid hydrogen storage systems usually do not recover and utilize the reaction heat of the hydrogen charging process. The hydrogen charging and hydrogen release processes of organic liquid hydrogen storage systems are relatively independent, requiring a large amount of external coolant to absorb the reaction heat of hydrogen charging or high-temperature coolant to provide the reaction heat of hydrogen release. The entire system has high energy consumption and poor economic efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a thermal management system for an organic liquid hydrogen storage device, which can recover the reaction heat during the hydrogen charging process and use it during the hydrogen release process, thereby reducing system energy consumption, lowering costs, and improving economic efficiency.

[0004] To achieve this objective, the present invention adopts the following technical solution: a thermal management system for an organic liquid hydrogen storage device, comprising an organic liquid circuit and a thermal management module. The organic liquid circuit includes a hydrogen filling tank and a hydrogen discharging tank. The hydrogen filling tank is provided with a first heat exchange channel, and the hydrogen discharging tank is provided with a second heat exchange channel. The first heat exchange channel and the second heat exchange channel are connected end to end through the thermal management module to form a coolant circuit for circulating coolant. The thermal management module includes a vapor-water separator, a steam compressor, and a heat storage component. The vapor-water separator, the steam compressor, and the heat storage component are connected in series between the output end of the first heat exchange channel and the input end of the second heat exchange channel to heat the coolant entering the second heat exchange channel.

[0005] Preferably, the thermal management module further includes a hydrogen-filled water storage tank and a hydrogen-release water storage tank. The first heat exchange channel is connected end-to-end with the hydrogen-filled water storage tank via the vapor-water separator to form a hydrogen-filled cooling liquid circuit. The second heat exchange channel is connected end-to-end with the hydrogen-release water storage tank to form a hydrogen-release cooling liquid circuit. One end of the heat storage component is connected between the output end of the hydrogen-release water storage tank and the input end of the second heat exchange channel. A first reflux pipe is provided between the hydrogen-filled cooling liquid circuit and the hydrogen-release cooling liquid circuit. The input end of the first reflux pipe is connected between the output end of the second heat exchange channel and the input end of the hydrogen-release water storage tank, and the other end is connected to the hydrogen-filled water storage tank.

[0006] Preferably, the heat storage component includes a steam-water mixing heater and a heat storage tank, the steam-water mixing heater and the heat storage tank are connected end to end to form a heating circuit, the input end of the steam-water mixing heater is connected to the output end of the steam compressor, the output end of the heat storage tank is connected between the output end of the hydrogen-releasing water tank and the input end of the second heat exchange channel, and the hydrogen-releasing water tank is connected to the heat storage tank through a second reflux pipe.

[0007] Preferably, the heat storage tank is a spherical tank.

[0008] Preferably, the thermal management module further includes a heating component for heating the hydrogen entering the hydrogen filling tank; and / or the coolant entering the hydrogen releasing tank.

[0009] Preferably, the hydrogen filling tank is provided with an inlet pipe, and the heating assembly includes a heat exchanger located between the output end of the hydrogen storage tank and the input end of the first heat exchange channel, and the heat exchanger is connected to the inlet pipe to heat the hydrogen entering the hydrogen filling tank.

[0010] Preferably, the heating assembly further includes a first heater located between the output end of the hydrogen release water tank and the input end of the second heat exchange channel.

[0011] Preferably, the organic liquid circuit further includes a hydrogen-rich liquid storage tank and a hydrogen-lean liquid storage tank. The hydrogen filling tank is provided with a first organic liquid channel, and the hydrogen releasing tank is provided with a second organic liquid channel. The first organic liquid channel, the hydrogen-rich liquid storage tank, the second organic liquid channel, and the hydrogen-lean liquid storage tank are connected end to end by pipelines to form the organic liquid circuit.

[0012] Preferably, the organic liquid circuit further includes a second heater, which is located between the output end of the hydrogen-rich liquid storage tank and the input end of the second organic liquid channel to heat the hydrogen-rich liquid entering the second organic liquid channel.

[0013] Preferably, the second heater is connected to the first return pipe.

[0014] The beneficial effects of this invention are as follows: During hydrogen charging in the thermal management system of the organic liquid hydrogen storage device, the heat released by the reaction in the charging tank exchanges heat with the coolant in the first heat exchange channel. The heat is carried away by the coolant in the form of a saturated steam-water mixture. After passing through, the steam-water mixture is separated into low-temperature steam and saturated water. The saturated water enters the coolant circuit for circulation. The low-temperature steam is compressed by the steam compressor to form high-temperature steam. The heat of the high-temperature steam is used to heat the coolant in the second heat exchange channel through the heat storage component, meeting the heat absorption requirements of the hydrogen release process. By setting up a steam compressor and a heat storage component, the coolant circulates between the charging tank and the hydrogen release tank. The steam compressor recovers the reaction heat during the hydrogen charging process, and the heat storage component applies the recovered heat to the subsequent hydrogen release process, reducing the need for external heating, reducing the heat consumption during hydrogen release, and simultaneously reducing the size of the cooling water system required for the hydrogen charging process. This lowers the layout cost of the organic liquid hydrogen storage system, reduces the overall energy consumption of the organic liquid hydrogen storage system, and effectively improves economic efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the thermal management system of the organic liquid hydrogen storage device according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the temperature and flow rate of the thermal management system of the organic liquid hydrogen storage device of the present invention.

[0017] In the diagram: 1. Organic liquid circuit; 11. Hydrogen charging tank; 111. Inlet pipe; 12. Hydrogen discharging tank; 121. Outlet pipe; 13. Hydrogen-rich liquid storage tank; 14. Hydrogen-lean liquid storage tank; 15. Second heater; 2. Thermal management module; 21. Gas-water separator; 22. Steam compressor; 23. Heat storage component; 231. Gas-water mixing heater; 232. Heat storage tank; 233. Second reflux pipe; 24. Hydrogen charging water storage tank; 241. Hydrogen charging coolant circuit; 25. Hydrogen discharging water storage tank; 251. Hydrogen discharging coolant circuit; 26. First reflux pipe; 27. Heat exchanger; 28. First heater. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0019] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature 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 includes the first feature 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.

[0021] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0022] Reference Figure 1 As shown in the embodiment of this application, a thermal management system for an organic liquid hydrogen storage device includes an organic liquid circuit 1 and a thermal management module 2. The organic liquid circuit 1 includes a hydrogen filling tank 11 and a hydrogen releasing tank 12. The hydrogen filling tank 11 is used to absorb hydrogen and react to produce a hydrogen-rich liquid for storing air. The hydrogen releasing tank 12 is used to convert the hydrogen-rich liquid into a hydrogen-lean liquid and release hydrogen. The hydrogen filling tank 11 is provided with a first heat exchange channel, which is filled with a coolant for absorbing the reaction heat of the hydrogen filling process. The hydrogen releasing tank 12 is provided with a second heat exchange channel, which is filled with a coolant for providing the reaction heat of the hydrogen filling process. It should be noted that in this application, saturated water, water, etc., all refer to the same coolant capable of absorbing or releasing heat. This is specifically stated here to avoid misunderstanding.

[0023] The first heat exchange channel and the second coolant heat exchange channel are connected end-to-end through the coolant thermal management module 2 to form a coolant circuit for coolant circulation. In other words, the output end of the first heat exchange channel and the input end of the second heat exchange channel are connected through the thermal management module 2, and the input end of the first heat exchange channel and the output end of the second heat exchange channel are also connected through the thermal management module 2. The thermal management module 2 includes a steam-water separator 21, a steam compressor 22, and a heat storage component 23. The steam-water separator 21 has an inlet, an outlet, and a water outlet. The steam-water separator 21, the steam compressor 22, and the heat storage component 23 are connected in series between the output end of the first heat exchange channel and the input end of the second heat exchange channel to heat the coolant entering the second heat exchange channel. Specifically, the inlet of the steam-water separator 21 is connected to the output end of the first heat exchange channel, and the outlet is connected to the steam compressor 22.

[0024] Understandably, when the organic liquid hydrogen storage device's thermal management system is filled with hydrogen, the heat released by the reaction in the hydrogen filling tank 11 exchanges heat with the coolant in the first heat exchange channel, so that the heat is carried away by the coolant in the form of a saturated steam-water mixture. After passing through, the steam-water mixture is separated into low-temperature steam and saturated water. The saturated water enters the coolant circuit for circulation. The low-temperature steam is compressed by the steam compressor 22 to form high-temperature steam. The heat of the high-temperature steam is heated by the heat storage component 23 and enters the coolant in the second heat exchange channel to meet the heat absorption requirements of the hydrogen release process.

[0025] By setting up a steam compressor 22 and a heat storage component 23, the coolant circulates between the hydrogen charging tank 11 and the hydrogen discharging tank 12. The steam compressor 22 recovers the reaction heat during the hydrogen charging process, and the heat storage component 23 applies the recovered heat to the subsequent hydrogen discharging process, reducing the demand for external heat supply. At the same time, it reduces the scale of the cooling water system required for the hydrogen charging process, thereby reducing the initial investment and overall energy consumption of the organic liquid hydrogen storage system and effectively improving economic efficiency.

[0026] The thermal management module 2 further includes a hydrogen-filled water storage tank 24 and a hydrogen-discharging water storage tank 25. A first heat exchange channel is formed by connecting the hydrogen-filled water storage tank 24 to the vapor-water separator 21, forming a hydrogen-filled cooling liquid circuit 241. The outlet of the vapor-water separator 21 is connected to the input of the hydrogen-filled water storage tank 24, and the output of the hydrogen-filled water storage tank 24 is connected to the input of the first heat exchange channel. A second heat exchange channel is also connected to the hydrogen-discharging water storage tank 25, forming a hydrogen-discharging cooling liquid circuit 251. One end of the heat storage component 23 is connected between the output of the hydrogen-discharging water storage tank 25 and the input of the second heat exchange channel. A first reflux pipe 26 is provided between the hydrogen-filled cooling liquid circuit 241 and the hydrogen-discharging cooling liquid circuit 251. The input of the first reflux pipe 26 is connected between the output of the second heat exchange channel and the input of the hydrogen-discharging water storage tank 25, and the other end is connected to the hydrogen-filled water storage tank 24.

[0027] By providing a hydrogen-filling water storage tank 24, the saturated water separated by the gas-water separator 21 is stored and returned to the hydrogen-filling tank 11, maintaining the normal operation of the hydrogen-filling process and ensuring the stability of the system. Similarly, by providing a hydrogen-releasing water storage tank 25, the coolant released after heat is released is stored and transported back to the heat storage component 23, maintaining the normal operation of the hydrogen-releasing process and ensuring the stability of the system.

[0028] By setting up the first return pipe 26, the first return pipe 26 can replenish the vapor separated by the vapor-water separator 21 to the hydrogen storage tank 25, maintain the balance of mass and heat of the hydrogen charging coolant circuit 241, ensure that the total amount of water in the hydrogen charging coolant circuit 241 remains unchanged, integrate the cooling water system of the conventional hydrogen charging process into the overall coolant circuit, and further reduce the layout cost of the organic liquid hydrogen storage system.

[0029] Reference Figure 1 and Figure 2 As shown, it can be understood that the heat storage component 23 includes a steam-water mixing heater 231 (i.e., a steam-water mixing heater) and a heat storage tank 232. The steam-water mixing heater 231 and the heat storage tank 232 are connected end to end to form a heating circuit. The input end of the steam-water mixing heater 231 is connected to the output end of the steam compressor 22. The output end of the heat storage tank 232 is connected between the output end of the hydrogen release water tank 25 and the input end of the second heat exchange channel. The hydrogen release water tank 25 is connected to the heat storage tank 232 through the second return pipe 233.

[0030] The steam-water mixing heater 231 absorbs the high-temperature steam from the mixing steam compressor 22 and the low-temperature coolant returning from the heat storage tank 232, raising the coolant to a temperature suitable for the reaction in the hydrogen release tank 12 before transferring it to the heat storage tank 232. The heat storage tank 232 decides whether to store or release the heated coolant depending on whether the hydrogen release tank 12 is operating. By setting up the steam-water mixing heater 231 and the heat storage tank 232, the heat storage component 23 can store the reaction heat during the hydrogen storage process in the heat storage tank 232, and then directly and quickly transfer the heat from the heat storage tank 232 to the hydrogen release tank 12 as needed. Compared to conventional organic liquid hydrogen storage systems, which require heating the coolant with an electric heater or a gas heater before releasing heat to the hydrogen release tank 12, the operation and adjustment of the heat storage component 23 are more flexible and rapid, effectively improving the utilization efficiency of the organic liquid hydrogen storage system.

[0031] In some embodiments, the thermal storage tank 232 is a spherical tank.

[0032] Since the thermal storage tank 232 primarily stores high-temperature coolant, it is designed as a spherical tank. Spherical tanks offer superior sealing and distribute stress evenly under internal pressure, effectively dispersing the thermal expansion pressure of the coolant, preventing localized stress concentration, and significantly reducing the risk of leakage or rupture. Furthermore, for the same volume, a spherical tank has a smaller surface area than a cylindrical tank, reducing heat loss and adapting to confined installation environments, further lowering the layout cost of the organic liquid hydrogen storage system.

[0033] Furthermore, the thermal management module 2 also includes a heating component, which is used to heat the hydrogen entering the hydrogen filling tank 11; or heat the coolant entering the hydrogen releasing tank 12; or simultaneously heat both the hydrogen entering the hydrogen filling tank 11 and the coolant entering the hydrogen releasing tank 12. That is, the heating component can heat one of the hydrogen entering the hydrogen filling tank 11 and the coolant entering the hydrogen releasing tank 12, or simultaneously heat both.

[0034] By incorporating a heating component, the hydrogen can be heated before entering the hydrogen charging tank 11 for reaction, raising the room-temperature hydrogen to a suitable reaction temperature and further improving the efficiency of the organic liquid hydrogen storage system. Alternatively, the coolant entering the hydrogen release pipe can be heated when the hydrogen enters the hydrogen release tank 12 for reaction, preventing insufficient coolant temperature in the latter half of the hydrogen release reaction from affecting its normal progress.

[0035] In some embodiments, the hydrogen filling tank 11 is provided with an inlet pipe 111 for introducing hydrogen (the hydrogen discharging tank 12 is provided with an outlet pipe 121 for discharging hydrogen), and the heating assembly includes a heat exchanger 27, which is located between the output end of the hydrogen storage tank 24 and the input end of the first heat exchange channel and is provided with a channel for coolant flow. The heat exchanger 27 is connected to the inlet pipe 111 to heat the hydrogen entering the hydrogen filling tank 11.

[0036] By setting up heat exchanger 27, the high-temperature saturated water that flows back from hydrogen storage tank 24 to hydrogen tank 11 exchanges heat with room-temperature hydrogen. While heating the hydrogen and improving the reaction efficiency, it also lowers the temperature of the coolant after absorbing the heat of reaction, allowing the coolant to return to hydrogen tank 11 at a low temperature to continue absorbing heat, thereby improving the working stability of the hydrogen-filled coolant circuit 241.

[0037] In some embodiments, the heating assembly further includes a first heater 28, which is located between the output end of the hydrogen release water storage tank 25 and the input end of the second heat exchange channel.

[0038] The coolant entering the second heat exchange channel is directly heated by the first heater 28, and heat is supplemented when the heat storage tank 232 is insufficient in the second half of the hydrogen release reaction.

[0039] Continue to refer to Figure 1As shown, the organic liquid circuit 1 also includes a hydrogen-rich liquid storage tank 13 and a hydrogen-lean liquid storage tank 14. The hydrogen charging tank 11 has a first organic liquid channel, and the hydrogen discharging tank 12 has a second organic liquid channel. The first organic liquid channel, the hydrogen-rich liquid storage tank 13, the second organic liquid channel, and the hydrogen-lean liquid storage tank 14 are connected end-to-end to form the organic liquid circuit 1. Specifically, the output end of the first organic liquid channel is connected to the input end of the hydrogen-rich liquid storage tank 13, the output end of the hydrogen-rich liquid storage tank 13 is connected to the input end of the second organic liquid channel, the output end of the second organic liquid channel is connected to the input end of the hydrogen-lean liquid storage tank 14, and the output end of the hydrogen-lean liquid storage tank 14 is connected to the input end of the first organic liquid channel.

[0040] By setting up a hydrogen-rich liquid storage tank 13 and a hydrogen-lean liquid storage tank 14, the organic liquid circulates in an organic liquid circuit 1 that is independent of the coolant circuit. This reduces the independence between the hydrogen charging tank 11 and the hydrogen discharging tank 12. The hydrogen charging tank 11 and the hydrogen discharging tank 12 share the same organic liquid, reducing the input of external organic liquid and thus reducing the operating cost of the organic liquid hydrogen storage system.

[0041] Furthermore, the organic liquid circuit 1 also includes a second heater 15, which is located between the output end of the hydrogen-rich liquid storage tank 13 and the input end of the second organic liquid channel to heat the hydrogen-rich liquid entering the second organic liquid channel.

[0042] By setting a second heater 15, the second heater 15 can heat the hydrogen-rich liquid entering the second organic liquid channel. Based on the heat of reaction provided by the high-temperature coolant in the heat storage tank 232, it provides a certain amount of heat for the hydrogen release process, further improving the working efficiency of the hydrogen release tank 12.

[0043] In some embodiments, the second heater 15 is connected to the first return pipe 26.

[0044] With the above arrangement, the coolant circuit and the organic liquid circuit 1 can exchange heat in reverse, that is, the hydrogen-rich liquid in the second heater 15 can exchange heat with the coolant in the first return pipe 26 in reverse, which reduces the heat of the coolant returning to the hydrogen storage tank 24 while increasing the heat of the hydrogen-rich liquid, thereby improving the heat recovery efficiency of the organic liquid hydrogen storage system and further reducing the energy consumption of the organic liquid hydrogen storage system.

[0045] The following describes in detail the workflow of the thermal management system of the organic liquid hydrogen storage device of this application, taking a large-scale stationary organic liquid hydrogen storage system as an example (total hydrogen storage capacity is 850,000 standard cubic meters). The heat of reaction during the hydrogen charging process is approximately 180°C, and the flow rate of saturated water during the hydrogen charging process is 1000 t / h. During the hydrogen release process, hot water at approximately 230°C needs to be added to provide heat and maintain the normal progress of the hydrogen release reaction. The flow rate of the hot water during the hydrogen release process is approximately 1530 t / h.

[0046] 1) Hydrogen charging process:

[0047] ① The first organic liquid channel in the hydrogen charging tank 11 obtains hydrogen-deficient liquid from the hydrogen-deficient liquid storage tank 14 and reacts with hydrogen. At the same time, the hydrogen charging cooling liquid circuit 241 provides 1000t / h of cooling liquid to the first heat exchange channel. The cooling liquid absorbs the reaction heat of the hydrogen charging process in the first heat exchange channel.

[0048] ② The steam-water separator 21 separates the steam (approximately 24 t / h) from the saturated steam-water mixture (1000 t / h, carrying the reaction heat of the hydrogen charging process) at approximately 180°C from the first heat exchange channel and sends it to the input end of the steam compressor 22. It also sends the saturated water (976 t / h) to the hydrogen charging coolant circuit 241. The hydrogen charging water storage tank 24 uses the heat exchanger 27 to heat the hydrogen in the inlet pipe 111. At the same time, it lowers the temperature of the saturated water to about 170°C and then returns it to the hydrogen charging tank 11 to absorb the reaction heat of the hydrogen charging process and maintain the normal operation of the hydrogen charging process. Meanwhile, the hydrogen-rich liquid produced by the reaction in the first organic liquid channel is stored in the hydrogen-rich liquid storage tank 13.

[0049] ③ 24t / h of saturated steam is pressurized to about 3.4MPa (380℃) by steam compressor 22 and input into steam-water mixing heater 231. Steam-water mixing heater 231 uses high-pressure steam to heat the 225℃ cold water (671t / h) returning from heat storage tank 232, raising its temperature to about 240℃. The output flow rate of the heated hot water is about 695t / h. Heat storage tank 232 stores the heated 240℃ high-temperature coolant.

[0050] 2) Hydrogen charging process

[0051] ① The second organic liquid channel in the hydrogen release tank 12 obtains hydrogen-rich liquid from the hydrogen-rich liquid storage tank 13 to react and generate hydrogen. At the same time, the heat storage tank 232 introduces 534 t / h of 240°C high-temperature coolant into the hydrogen release cooling liquid circuit 251. The 240°C high-temperature coolant mixes with the 1030 t / h of 225°C coolant provided by the hydrogen release water storage tank 25 to provide 1554 t / h of coolant (230°C) for the first heat exchange channel, thereby providing the required reaction heat for hydrogen charging.

[0052] ② After hydrogen release, the 1554 t / h coolant is cooled to 225°C. Of this, 1530 t / h of coolant returns to the hydrogen release water storage tank 25 through the hydrogen release coolant circuit 251, while the remaining 24 t / h of coolant returns to the hydrogen filling water storage tank 24 through the first return pipe 26 (while exchanging heat with the hydrogen-rich liquid in the second heater 15 in the reverse direction). A portion (500 t / h) of the coolant (225°C) from the hydrogen release water storage tank 25 is returned to the heat storage tank 232, and the other portion (1030 t / h) is mixed with the hot water from the heat storage tank 232 and together they supply heat to the hydrogen release tank 12 to maintain the continuous hydrogen release reaction. At the same time, the hydrogen-lean liquid produced in the reaction in the second organic liquid channel is stored in the hydrogen-lean liquid storage tank 14.

[0053] ③ If the hydrogen release tank 12 is used continuously, resulting in insufficient coolant temperature in the second half of the hydrogen release reaction, the first heater 28 will be activated to heat the 1554t / h coolant entering the first heat exchange channel, so that the coolant temperature is maintained at 230℃.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A thermal management system for an organic liquid hydrogen storage device, characterized in that, include: The organic liquid circuit (1) includes a hydrogen charging tank (11) and a hydrogen discharging tank (12). The hydrogen charging tank (11) is provided with a first heat exchange channel, and the hydrogen discharging tank (12) is provided with a second heat exchange channel. The thermal management module (2) connects the first heat exchange channel and the second heat exchange channel end to end to form a coolant circuit for coolant circulation. The thermal management module (2) includes a steam-water separator (21), a steam compressor (22), and a heat storage component (23). The steam-water separator (21), the steam compressor (22), and the heat storage component (23) are connected in series between the output end of the first heat exchange channel and the input end of the second heat exchange channel to heat the coolant entering the second heat exchange channel.

2. The thermal management system for the organic liquid hydrogen storage device according to claim 1, characterized in that, The thermal management module (2) further includes a hydrogen-filled water storage tank (24) and a hydrogen-discharging water storage tank (25). The first heat exchange channel is connected end to end to form a hydrogen-filled cooling liquid circuit (241) through the gas-water separator (21) and the hydrogen-filled water storage tank (24). The second heat exchange channel and the hydrogen-discharging water storage tank (25) are connected end to end to form a hydrogen-discharging cooling liquid circuit (251). One end of the heat storage component (23) is connected between the output end of the hydrogen-discharging water storage tank (25) and the input end of the second heat exchange channel. A first reflux pipe (26) is provided between the hydrogen-filled cooling liquid circuit (241) and the hydrogen-discharging cooling liquid circuit (251). The input end of the first reflux pipe (26) is connected between the output end of the second heat exchange channel and the input end of the hydrogen-discharging water storage tank (25), and the other end is connected to the hydrogen-filled water storage tank (24).

3. The thermal management system for the organic liquid hydrogen storage device according to claim 2, characterized in that, The heat storage component (23) includes a steam-water mixing heater (231) and a heat storage tank (232). The steam-water mixing heater (231) and the heat storage tank (232) are connected end to end to form a heating circuit. The input end of the steam-water mixing heater (231) is connected to the output end of the steam compressor (22). The output end of the heat storage tank (232) is connected between the output end of the hydrogen-releasing water tank (25) and the input end of the second heat exchange channel. The hydrogen-releasing water tank (25) is connected to the heat storage tank (232) through a second return pipe (233).

4. The thermal management system for the organic liquid hydrogen storage device according to claim 3, characterized in that, The heat storage tank (232) is a spherical tank.

5. The thermal management system for the organic liquid hydrogen storage device according to claim 2, characterized in that, The thermal management module (2) further includes a heating component for heating hydrogen entering the hydrogen filling tank (11); and / or the coolant entering the hydrogen releasing tank (12).

6. The thermal management system for the organic liquid hydrogen storage device according to claim 5, characterized in that, The hydrogen filling tank (11) is provided with an inlet pipe (111), and the heating assembly includes a heat exchanger (27). The heat exchanger (27) is located between the output end of the hydrogen storage tank (24) and the input end of the first heat exchange channel, and the heat exchanger (27) is connected to the inlet pipe (111) to heat the hydrogen entering the hydrogen filling tank (11).

7. The thermal management system for the organic liquid hydrogen storage device according to claim 5, characterized in that, The heating assembly also includes a first heater (28), which is located between the output end of the hydrogen-releasing water tank (25) and the input end of the second heat exchange channel.

8. The thermal management system for the organic liquid hydrogen storage device according to claim 2, characterized in that, The organic liquid circuit (1) further includes a hydrogen-rich liquid storage tank (13) and a hydrogen-lean liquid storage tank (14). The hydrogen filling tank (11) is provided with a first organic liquid channel, and the hydrogen releasing tank (12) is provided with a second organic liquid channel. The first organic liquid channel, the hydrogen-rich liquid storage tank (13), the second organic liquid channel and the hydrogen-lean liquid storage tank (14) are connected end to end by pipelines to form the organic liquid circuit (1).

9. The thermal management system for the organic liquid hydrogen storage device according to claim 8, characterized in that, The organic liquid circuit (1) further includes a second heater (15), which is located between the output end of the hydrogen-rich liquid storage tank (13) and the input end of the second organic liquid channel to heat the hydrogen-rich liquid entering the second organic liquid channel.

10. The thermal management system for the organic liquid hydrogen storage device according to claim 9, characterized in that, The second heater (15) is connected to the first return pipe (26).

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