Fuel cell heat exchange system and multifunctional cabin comprising same

Abstract

The invention discloses a fuel cell heat exchange system and a multifunctional cabin comprising the same. The fuel cell heat exchange system comprises a fuel cell, the fuel cell comprises a hot fluid output end, and first hot fluid flows out of the fuel cell through the hot fluid output end; the first hot fluid inlet receives a first hot fluid; the first cold fluid flows in through the first cold fluid inlet and exchanges heat with the first hot fluid; the first cold fluid after heat exchange flows out from the first cold fluid outlet; the first hot fluid is subjected to heat exchange to obtain second hot fluid, and the second hot fluid flows out from the first hot fluid outlet; when the temperature of the second hot fluid is larger than or equal to a set temperature threshold value, the second hot fluid is conveyed to a second heat exchange device for heat exchange; otherwise, the second hot fluid is delivered to the coolant inlet of the fuel cell. According to the fuel cell heat exchange system and the multifunctional cabin comprising the same disclosed by the embodiment of the invention, the heat of the thermal fluid of the fuel cell can be recycled, and the energy utilization rate is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fuel cell technology, in particular to a fuel cell heat exchange system and a multifunctional cabin comprising the same. BACKGROUND

[0002] The multifunctional cabin is a highly integrated, environmentally controlled closed livable module, and its core design concept is to provide safe, comfortable and sustainable living and working space for humans in limited or extreme environments. In high-altitude cold regions (such as the western region of China), there are problems of energy shortage and difficult energy transportation, and the multifunctional cabin including fuel cells has been well applied in these regions.

[0003] In the prior art, a large amount of waste heat is generated when a fuel cell (such as a hydrogen fuel cell) is burned, which causes energy loss and even environmental hazards. The fuel cell needs a large amount of cooling liquid, and the waste heat after the cooling liquid absorbs heat also lacks good utilization.

[0004] Therefore, it is desirable to have a new fuel cell heat exchange system and a multifunctional cabin comprising the same, which can at least overcome one of the above problems. SUMMARY

[0005] In view of the above problems, the purpose of the present application is to provide a fuel cell heat exchange system and a multifunctional cabin comprising the same, in particular a hydrogen battery heat exchange device suitable for a hydrogen multifunctional cabin, so as to recycle and utilize the heat of the fuel cell hot fluid and improve energy utilization.

[0006] According to an aspect of the present application, a fuel cell heat exchange system is provided, comprising:

[0007] a fuel cell, the fuel cell comprising a hot fluid output end, a first hot fluid flowing out of the fuel cell via the hot fluid output end;

[0008] a first heat exchange device, the first heat exchange device comprising a first hot fluid inlet, a first hot fluid outlet, a first cold fluid inlet and a first cold fluid outlet; the first hot fluid inlet being in communication with the hot fluid output end to receive the first hot fluid; a first cold fluid flowing in via the first cold fluid inlet and exchanging heat with the first hot fluid; the first cold fluid after heat exchange flowing out via the first cold fluid outlet; the first hot fluid after heat exchange obtaining a second hot fluid, the second hot fluid flowing out via the first hot fluid outlet; and

[0009] a temperature control device, the temperature control device measuring the temperature of the second thermal fluid flowing out of the first thermal fluid outlet; when the temperature of the second thermal fluid flowing out of the first thermal fluid outlet is greater than or equal to a set temperature threshold, delivering the second thermal fluid to the second heat exchange device for heat exchange; when the temperature of the second thermal fluid flowing out of the first thermal fluid outlet is less than the set temperature threshold, delivering the second thermal fluid to the coolant inlet of the fuel cell via the first return pipe.

[0010] Optionally, the fuel cell heat exchange system further includes a pre-pressurizing device and a pressurizing device;

[0011] The fuel gas is pressurized by the pre-pressurizing device and the pressurizing device in sequence and then delivered to the fuel cell;

[0012] The pre-pressurizing device is connected to the first cold fluid outlet to receive the first cold fluid after heat exchange; the heat of the first cold fluid after heat exchange is used to heat the fuel gas to achieve pressurization of the fuel gas.

[0013] Optionally, the pre-pressurizing device is also connected to the first cold fluid inlet, and the first cold fluid inlet receives the first cold fluid after heating the fuel gas.

[0014] Optionally, the fuel cell heat exchange system further includes:

[0015] A flow control device monitors the flow in the first return pipe, and when the flow in the first return pipe is greater than a set flow threshold, at least a portion of the second thermal fluid flowing out of the first thermal fluid outlet is delivered to the second heat exchange device.

[0016] Optionally, the fuel cell heat exchange system further includes:

[0017] A first cooling device is connected to the first cold fluid outlet; when the temperature of the first cold fluid after heat exchange is greater than or equal to a first temperature threshold, the first cooling device cools the first cold fluid after heat exchange.

[0018] Optionally, the second heat exchange device includes a second hot fluid inlet, a second hot fluid outlet, a second cold fluid inlet and a second cold fluid outlet;

[0019] The second thermal fluid inlet is connected to the first thermal fluid outlet to receive the second thermal fluid;

[0020] The second cold fluid flows in through the second cold fluid inlet and exchanges heat with the second hot fluid; the second cold fluid after heat exchange flows out through the second cold fluid outlet;

[0021] The third thermal fluid is obtained after the second thermal fluid exchanges heat, and the third thermal fluid flows out through the second thermal fluid outlet,

[0022] The temperature of the third thermal fluid flowing out of the second thermal fluid outlet is measured by the temperature control device; when the temperature of the third thermal fluid flowing out of the second thermal fluid outlet is greater than or equal to a temperature threshold, the third thermal fluid is transported to a third heat exchange device for heat exchange; when the temperature of the third thermal fluid flowing out of the second thermal fluid outlet is less than the temperature threshold, the third thermal fluid is transported to the cooling liquid inlet through a second return pipeline.

[0023] Optionally, the third heat exchange device comprises a third thermal fluid inlet, a third thermal fluid outlet, a third cold fluid inlet and a third cold fluid outlet.

[0024] The third thermal fluid inlet is in communication with the second thermal fluid outlet to receive the third thermal fluid.

[0025] The third cold fluid flows in through the third cold fluid inlet and exchanges heat with the third thermal fluid; the third cold fluid after heat exchange flows out through the third cold fluid outlet.

[0026] The fourth thermal fluid is obtained after the third thermal fluid exchanges heat, and the fourth thermal fluid flows out through the third thermal fluid outlet.

[0027] Optionally, the fuel cell heat exchange system further comprises:

[0028] A second cooling device is connected to the third thermal fluid outlet; when the temperature of the fourth thermal fluid is greater than or equal to a second temperature threshold, the second cooling device cools the fourth thermal fluid,

[0029] When the temperature of the fourth thermal fluid is less than the second temperature threshold, the fourth thermal fluid is transported to the cooling liquid inlet through a third return pipeline.

[0030] Optionally, the material of the pipeline through which the first thermal fluid flows is determined according to the temperature range of the first thermal fluid; and / or

[0031] The material of the pipeline through which the second thermal fluid flows is determined according to the temperature range of the second thermal fluid; and / or

[0032] The material of the pipeline through which the third thermal fluid flows is determined according to the temperature range of the third thermal fluid.

[0033] According to another aspect of the present application, a multifunctional cabin is provided, comprising:

[0034] A multifunctional cabin body; and

[0035] The fuel cell heat exchange system as described above,

[0036] The fuel cell supplies power for the multifunctional cabin body.

[0037] The first cold fluid after heat exchange provides heat energy for the multifunctional cabin body.

[0038] The fuel cell heat exchange system and the multifunctional cabin provided by the application can heat the first hot fluid from the fuel cell, and the second hot fluid after heat exchange can be used again according to different temperatures, so that the heat of the fuel cell hot fluid is fully recycled and utilization, and the energy utilization rate is greatly improved.

[0039] Further, the heat of the fuel cell hot fluid is graded recycled, and hot water with different temperatures is obtained, so that the recycled heat can be used conveniently.

[0040] Further, the path of heat exchange is adjusted according to the flow of fluid in the heat exchange system, so that the temperature of the fluid after heat exchange does not exceed the bearing range, and the safety of the heat exchange system is ensured.

[0041] Further, the recycled energy can also be used for pre-pressurization of fuel gas of the fuel cell, so that the performance of the fuel cell is improved, and the application range of the recycled energy is enriched.

[0042] Further, the pipes and valves matched are selected according to temperature and flow, so that the performance and cost of the heat exchange system are considered. DETAILED DESCRIPTION

[0043] The above and other objects, features and advantages of the present application will become more apparent from the following description of embodiments of the present application, taken in conjunction with the accompanying drawings, in which:

[0044] Figure 1 Fig. 1 shows a structure schematic diagram of a fuel cell heat exchange system according to an embodiment of the present application;

[0045] Figure 2 Fig. 2 shows a structure schematic diagram of a fuel cell heat exchange system according to another embodiment of the present application;

[0046] Figure 3 Fig. 3 shows an exploded view of the fuel cell heat exchange system according to the embodiment of the present application;

[0047] Figure 4 Fig. 4 shows a top view of the fuel cell heat exchange system according to the embodiment of the present application;

[0048] Figure 5 Fig. 5 shows a rear view of the fuel cell heat exchange system according to the embodiment of the present application;

[0049] Figure 6 Fig. 7 shows a front view of a fuel cell heat exchange system according to Embodiment Two of the present application;

[0050] Figure 7 Fig. 8 shows a right view of a fuel cell heat exchange system according to Embodiment Two of the present application;

[0051] Figure 8 Fig. 9 shows a left view of a fuel cell heat exchange system according to Embodiment Two of the present application;

[0052] Figure 9 Fig. 10 shows a structural schematic diagram of a multifunctional cabin according to an embodiment of the present application. DETAILED DESCRIPTION

[0053] Various embodiments of the present application will be described in greater detail below with reference to the accompanying drawings. In the various drawings, like elements are denoted by the same or similar reference numerals. Each part in the drawings is not drawn to scale for the sake of clarity. Also, some parts that are well known can not be shown in the drawings.

[0054] The specific embodiments of the present application will be further described below with reference to the drawings and embodiments. Many specific details of the present application are described below in order to provide a thorough understanding of the present application. However, as will be readily understood by one skilled in the art, the present application can be practiced without

[0055] It should be understood that when a layer, a region, or a component is referred to as being "on" or "above" another layer, another region, or another component, it can be directly on the other layer, the other region, or the other component, or intervening layers or regions can also be present. In addition, when a layer, a region, or a component is referred to as being "under" or "below" another layer, another region, or another component, it can be directly on the other layer, the other region, or the other component, or intervening layers or regions can also be present. Furthermore, a layer, a region, or a component can be "on", "above", "under", or "below" other layers, regions, or components.

[0056] Figure 1 Fig. 1 shows a structural schematic diagram of a fuel cell heat exchange system according to Embodiment One of the present application. As shown in Fig. 1, the fuel cell heat exchange system according to Embodiment One of the present application comprises a fuel cell 20, a first heat exchange device 3, a temperature control device 21, a second heat exchange device 8, and a first return flow pipeline 27. Figure 1

[0057] ​In particular, the fuel cell 20 includes a hot fluid outlet 22. The first hot fluid flows out of the fuel cell 20 via the hot fluid outlet 22. The first hot fluid includes, but is not limited to, water generated by the fuel cell 20 (e.g., water generated during a hydrogen fuel cell reaction), heat-exchanged coolant, etc. Optionally, the fuel cell 20 also includes a coolant inlet 21. Coolant flows into the fuel cell 20 via the coolant inlet 21. The coolant absorbs heat (e.g., heat released by the fuel cell 20 stack, etc.) to become heat-exchanged coolant; the heat-exchanged coolant can flow out of the fuel cell 20 as the first hot fluid via the hot fluid outlet 22. The coolant is, for example, at least one of water, glycol-based coolant, propylene glycol-based coolant, non-alcohol-based coolant (e.g., perfluoropolyether, ester, etc.).

[0058] The first heat exchange device 3 includes a first hot fluid inlet 23, a first hot fluid outlet 24, a first cold fluid inlet 25, and a first cold fluid outlet 26. The first hot fluid inlet 23 is in communication with the hot fluid outlet 22 to receive the first hot fluid. The first cold fluid flows in via the first cold fluid inlet 25 and exchanges heat with the first hot fluid, and the heat-exchanged first cold fluid flows out via the first cold fluid outlet 26. The first hot fluid exchanges heat to become second hot fluid, which flows out via the first hot fluid outlet 24. The first cold fluid has a temperature lower than that of the first hot fluid. The first cold fluid is, for example, a liquid (water, oil, etc.) that is heated by the first heat exchange device 3 to have a higher temperature, and the heat thereof can be utilized.

[0059] The temperature control device 21 measures the temperature of the second hot fluid flowing out of the first hot fluid outlet 24. When the temperature of the second hot fluid flowing out of the first hot fluid outlet 24 is greater than or equal to a set temperature threshold, the second hot fluid is delivered to the second heat exchange device 8 for heat exchange, and the second hot fluid exchanges heat in the second heat exchange device 8 as a hot fluid. When the temperature of the second hot fluid flowing out of the first hot fluid outlet 24 is less than the set temperature threshold, the second hot fluid is delivered to the coolant inlet 21 via the first return conduit 27. The set temperature threshold corresponds, for example, to a coolant (second hot fluid) injection temperature acceptable to the fuel cell 20.

[0060] In an optional embodiment of the present application, the fuel cell heat exchange system further includes a flow control device (not shown). The flow control device monitors the flow in the first return conduit 27, and when the flow in the first return conduit 27 is greater than a set flow threshold, at least a portion of the second hot fluid flowing out of the first hot fluid outlet 24 is delivered to the second heat exchange device 8, thereby preventing excessive second hot fluid from being injected into the fuel cell.

[0061] In an alternative embodiment of the present application, the fuel cell heat exchange system further comprises a first cooling device (not shown in the figures). The first cooling device is connected to the first cold fluid outlet 26. When the temperature of the heat-exchanged first cold fluid is greater than or equal to the first temperature threshold, the first cooling device cools the heat-exchanged first cold fluid, thereby preventing the heat-exchanged first cold fluid from having a temperature that is too high to affect the safety, stability and use of subsequent equipment.

[0062] In an alternative embodiment of the present application, the second heat exchange device 8 comprises a second hot fluid inlet, a second hot fluid outlet, a second cold fluid inlet and a second cold fluid outlet. The second hot fluid inlet is connected to the first hot fluid outlet 24 to receive the second hot fluid. The second cold fluid flows in through the second cold fluid inlet and exchanges heat with the second hot fluid. The heat-exchanged second cold fluid flows out through the second cold fluid outlet. The second hot fluid is heat-exchanged to become a third hot fluid, which flows out through the second hot fluid outlet.

[0063] The temperature control device 21 measures the temperature of the third hot fluid flowing out of the second hot fluid outlet. When the temperature of the third hot fluid flowing out of the second hot fluid outlet is greater than or equal to a temperature threshold, the third hot fluid is delivered to a third heat exchange device for heat exchange. When the temperature of the third hot fluid flowing out of the second hot fluid outlet is less than the temperature threshold, the third hot fluid is delivered to the cooling liquid inlet 21 through the second return conduit. The temperature threshold corresponds to, for example, the acceptable temperature of the cooling liquid (third hot fluid) for the fuel cell 20.

[0064] Optionally, the third heat exchange device comprises a third hot fluid inlet, a third hot fluid outlet, a third cold fluid inlet and a third cold fluid outlet. The third hot fluid inlet is connected to the second hot fluid outlet to receive the third hot fluid. The third cold fluid flows in through the third cold fluid inlet and exchanges heat with the third hot fluid. The heat-exchanged third cold fluid flows out through the third cold fluid outlet. The third hot fluid is heat-exchanged to become a fourth hot fluid, which flows out through the third hot fluid outlet.

[0065] Figure 2 A structural schematic diagram of the fuel cell heat exchange system according to Embodiment Two of the present application is shown. Figure 3 An exploded view of the fuel cell heat exchange system according to Embodiment Two of the present application is shown. Figure 4 A top view of the fuel cell heat exchange system according to Embodiment Two of the present application is shown. Figure 5 A rear view of the fuel cell heat exchange system according to Embodiment Two of the present application is shown. Figure 6 A front view of the fuel cell heat exchange system according to Embodiment Two of the present application is shown. Figure 7 A right view of the fuel cell heat exchange system according to Embodiment Two of the present application is shown. Figure 8A left view of a fuel cell heat exchange system according to an embodiment of the present application is shown.

[0066] As shown in Figure 2 the fuel cell heat exchange system further comprises a pre-pressurizing device and a pressurizing device. The fuel gas is delivered to the fuel cell after being pressurized by the pre-pressurizing device and the pressurizing device in sequence. The pre-pressurizing device is connected to the first cold fluid outlet to receive the first cold fluid after heat exchange, and the heat of the first cold fluid after heat exchange is used to heat the fuel gas to achieve pressurization of the fuel gas.

[0067] Optionally, the pre-pressurizing device is further connected to the first cold fluid inlet, and the first cold fluid inlet receives the first cold fluid after heating the fuel gas.

[0068] In an optional embodiment of the present application, the fuel cell heat exchange system further comprises a second cooling device. The second cooling device is connected to the third hot fluid outlet. When the temperature of the fourth hot fluid is greater than or equal to the second temperature threshold, the second cooling device cools the fourth hot fluid. When the temperature of the fourth hot fluid is less than the second temperature threshold, the fourth hot fluid is delivered to the cooling liquid inlet via the third return pipeline.

[0069] In an optional embodiment of the present application, the material of the pipeline (and valve) through which the first hot fluid flows is determined according to the temperature range of the first hot fluid; and / or the material of the pipeline through which the second hot fluid flows is determined according to the temperature range of the second hot fluid; and / or the material of the pipeline through which the third hot fluid flows is determined according to the temperature range of the third hot fluid. Optionally, the material of the pipeline through which the first cold fluid flows is determined according to the temperature range of the first cold fluid; and / or the material of the pipeline through which the second cold fluid flows is determined according to the temperature range of the second cold fluid; and / or the material of the pipeline through which the third cold fluid flows is determined according to the temperature range of the third cold fluid.

[0070] In combination Figures 2 to 8 As shown in the specific embodiment of the present application, the fuel cell heat exchange system is used in a multi-functional cabin, and the fuel cell heat exchange system comprises a hydrogen storage tank 1, a pressurizing device 2, a first heat exchange device 3, a valve 4, a pre-pressurizing pipeline 5, an emergency external air cooling device 6, a third heat exchange device 7, a second heat exchange device 8, a gasification device 9, a hydrogen battery reactor 10, a filter screen 11, a three-way electric valve 12, a circulating pump 13, a buffer tank 14, a ventilation pipeline 15, a hydrogen supply pipeline 16, a high-temperature pipeline 17, a medium-temperature pipeline 18, and a low-temperature pipeline 19. In this embodiment, the first hot fluid is water, which can be a mixture of water generated by the hydrogen fuel cell and cooling liquid (water).

[0071] When the hydrogen fuel cell is about to start, hydrogen is pressurized by the pressurizing device 2 after passing through the gasification device 9 from the hydrogen storage tank 1. After the pressure meets the requirements, the hydrogen is injected into the reaction device (hydrogen cell reaction stack 10) of the hydrogen fuel cell for reaction. The high-temperature waste water (first heat fluid) generated after the reaction passes through the high-temperature pipeline 17 and the circulating pump 13 and enters the first heat exchange device 3 (of the multifunctional cabin). Since the temperature of the high-temperature waste water is too high, the high-temperature pipeline 17 and the circulating pump 13 are made of high-temperature resistant materials, such as polytetrafluoroethylene (PTFE) pipe, etc. The high-temperature waste water enters the first heat exchange device 3 for the first heat exchange.

[0072] After the first heat exchange, the heat-exchanged first cold fluid (multifunctional cabin high-temperature water) is first measured in temperature, and then part of it is used in the high-temperature area of the multifunctional cabin, and the remaining part waits for the next round of heat exchange in the first heat exchange device 3 after passing through the pre-pressurizing pipeline 5. If the temperature of the heat-exchanged first cold fluid is too high or out of control, an emergency external air cooling can be started to avoid the damage caused by the too high temperature after heat exchange affecting the use of the multifunctional cabin and the generation of high temperature.

[0073] The medium-temperature waste water (second heat fluid) generated after passing through the first heat exchange device 3 passes through the high-temperature pipeline 17 and the three-way electric valve (three-way electric temperature regulating valve) 12. The three-way electric valve 12 can select the water temperature through a program. If the water temperature is lower than the temperature threshold value that can be injected back into the hydrogen fuel cell, the water (second heat fluid) can be directly injected back into the fuel cell after passing through the filter screen 11. If the water temperature is higher than the injection temperature, the water can be injected into the second heat exchange device 8 through the medium-temperature pipeline 18 and the circulating pump 13.

[0074] The second heat exchange device 8 performs the second heat exchange on the medium-temperature waste water, and measures the temperature after the heat exchange. After the second heat exchange of the medium-temperature waste water, low-temperature waste water (third heat fluid) is obtained. If the temperature of the low-temperature waste water meets the injection requirements, the low-temperature waste water is injected back into the hydrogen fuel cell for use (as a cooling liquid). The heat-exchanged second cold fluid (multifunctional cabin medium-temperature water) obtained after the second heat exchange is used in the medium-temperature area of the multifunctional cabin. If the temperature of the low-temperature waste water does not meet the injection requirements (temperature threshold value), the low-temperature waste water enters the third heat exchange device 7 of the multifunctional cabin for heat exchange.

[0075] The third heat exchange device 7 performs heat exchange on the low-temperature waste water, and part of the low-temperature water (heat-exchanged third cold fluid) obtained after the heat exchange is used in the low-temperature area of the multifunctional cabin, and the remaining low-temperature waste water (fourth heat fluid) is still not in line with the cooling water requirements and is injected back into the hydrogen fuel cell after being cooled by external air cooling. If the low-temperature waste water meets the cooling water temperature requirements, it can be directly injected into the hydrogen fuel cell.

[0076] Optionally, the diameter of the high-temperature pipeline 17 is larger than the diameter of the medium-temperature pipeline 18, and the diameter of the medium-temperature pipeline 18 is larger than the diameter of the low-temperature pipeline 19. For example, the diameter of the high-temperature pipeline 17 is 32 mm, the diameter of the medium-temperature pipeline 18 is 25 mm, and the diameter of the low-temperature pipeline 19 is 20 mm.

[0077] Figure 9 A structural schematic diagram of the multifunctional cabin according to an embodiment of the present application is shown. As shown, the multifunctional cabin according to the embodiment of the present application comprises a multifunctional cabin body 100 and a fuel cell heat exchange system 200 as described above. The fuel cell in the fuel cell heat exchange system 200 supplies power to the multifunctional cabin body 100, and the first cold fluid after heat exchange provides thermal energy to the multifunctional cabin body 100. Figure 9

[0078] In combination with Figures 2 to 9 As shown, the multifunctional cabin (fuel cell heat exchange system) provided by the present application uses the waste heat generated by the fuel cell combustion after heat exchange for the multifunctional cabin, and the exchanged heat is supplied to the multifunctional cabin in different temperature zones.

[0079] The fuel cell heat exchange system 200 comprises a pre-pressurizing device, a first heat exchange device, a second heat exchange device, a third heat exchange device, and matched high-temperature, medium-temperature, and low-temperature pipelines and related electromagnetic valves, filter screens, and emergency external air cooling.

[0080] The pre-pressurizing device uses part of the first exchanged heat for gasification and pressurization of the fuel gas (hydrogen, etc.). The pre-pressurizing device is arranged before the pressurizing device to reduce the energy consumption required by the pressurizing device.

[0081] The first heat exchange device is to perform first heat exchange on the high-temperature waste water generated by the (hydrogen) fuel cell combustion. The temperature obtained by the first heat exchange is relatively high, and the exchanged heat is distributed to the pre-pressurization of the fuel gas and the use of the high-temperature zone of the multifunctional cabin as needed.

[0082] The second heat exchange device is to perform heat exchange on the residual heat generated by the first heat exchange device, to avoid the heat injected into the fuel cell after the first heat exchange being too high and the shunting when the flow is high, and to avoid the large amount of cooling liquid after heat exchange being injected into the fuel cell. The heat obtained after the second heat exchange is used for the use of the medium-temperature zone of the multifunctional cabin.

[0083] The third heat exchange device is to perform heat exchange on the residual heat generated by the second heat exchange device, which can be mainly used for the use of the low-temperature zone of the multifunctional cabin, and is also used for accelerated treatment of the cooling liquid when the battery is operated at high power or for emergency injection of low-temperature water into high-temperature water to reduce the temperature and avoid damage to the pipeline and device caused by high temperature, and also improve the comfort of the multifunctional cabin.

[0084] ​The high-temperature pipeline, the medium-temperature pipeline and the low-temperature pipeline are divided according to temperature, and different pipeline materials can be selected according to different temperatures, and performance requirements and costs are considered.

[0085] The fuel cell heat exchange system and the multifunctional cabin comprising the same provided by the application utilize the waste heat of the fuel cell combustion to perform heat exchange for the multifunctional cabin, the waste heat generated by the fuel cell is first supplied to pre-pressurization, and the waste heat is supplied to the multifunctional cabin in three stages for heat exchange and use in high-temperature, medium-temperature and low-temperature regions, so that the use requirements of the multifunctional cabin for different temperatures are met, the energy supply efficiency of the fuel cell is improved, the environment is protected, the energy loss is avoided, and the fuel cell heat exchange system has good application prospect.

[0086] It should be noted that, in this document, the terms“first” and“second” and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms“comprises,”“comprising,” or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by“comprises... a” does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0087] In accordance with the embodiments of the present application as described above, these embodiments do not describe all the details of the application, and the application is not limited to the specific embodiments described. Obviously, many modifications and variations can be made in light of the above description. The present description selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well utilize the application and make modifications and uses based on the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A fuel cell heat exchange system, comprising: a fuel cell, the fuel cell comprising a thermal fluid output end, and a first thermal fluid flows out of the fuel cell via the thermal fluid output end; a first heat exchange device, the first heat exchange device comprising a first hot fluid inlet, a first hot fluid outlet, a first cold fluid inlet, and a first cold fluid outlet; the first hot fluid inlet is connected to the hot fluid output end to receive the first hot fluid; a first cold fluid flows in through the first cold fluid inlet and exchanges heat with the first hot fluid; the first cold fluid after heat exchange flows out through the first cold fluid outlet; a second hot fluid is obtained after heat exchange with the first hot fluid, and the second hot fluid flows out through the first hot fluid outlet; as well as a temperature control device, the temperature control device measuring the temperature of the second thermal fluid flowing out of the first thermal fluid outlet; when the temperature of the second thermal fluid flowing out of the first thermal fluid outlet is greater than or equal to a set temperature threshold, delivering the second thermal fluid to the second heat exchange device for heat exchange; when the temperature of the second thermal fluid flowing out of the first thermal fluid outlet is less than the set temperature threshold, delivering the second thermal fluid to the coolant inlet of the fuel cell via the first return pipe.

2. The fuel cell heat exchange system according to claim 1, wherein: The fuel cell heat exchange system further includes a pre-pressurizing device and a pressurizing device; The fuel gas is pressurized by the pre-pressurizing device and the pressurizing device in sequence and then delivered to the fuel cell; The pre-pressurizing device is connected to the first cold fluid outlet to receive the first cold fluid after heat exchange; the heat of the first cold fluid after heat exchange is used to heat the fuel gas to achieve pressurization of the fuel gas.

3. The fuel cell heat exchange system according to claim 2, wherein: The pre-pressurizing device is also connected to the first cold fluid inlet, and the first cold fluid inlet receives the first cold fluid after heating the fuel gas.

4. The fuel cell heat exchange system according to claim 1, wherein: The fuel cell heat exchange system further includes: A flow control device monitors the flow in the first return pipe, and when the flow in the first return pipe is greater than a set flow threshold, at least a portion of the second thermal fluid flowing out of the first thermal fluid outlet is delivered to the second heat exchange device.

5. The fuel cell heat exchange system according to claim 1, wherein: The fuel cell heat exchange system further includes: A first cooling device is connected to the first cold fluid outlet; when the temperature of the first cold fluid after heat exchange is greater than or equal to a first temperature threshold, the first cooling device cools the first cold fluid after heat exchange.

6. The fuel cell heat exchange system according to claim 1, wherein: The second heat exchange device includes a second hot fluid inlet, a second hot fluid outlet, a second cold fluid inlet and a second cold fluid outlet; The second thermal fluid inlet is connected to the first thermal fluid outlet to receive the second thermal fluid; The second cold fluid flows in through the second cold fluid inlet and exchanges heat with the second hot fluid; the second cold fluid after heat exchange flows out through the second cold fluid outlet; The second thermal fluid is exchanged with the third thermal fluid, and the third thermal fluid flows out through the second thermal fluid outlet. In which, the temperature control device measures the temperature of the third hot fluid flowing out of the second hot fluid outlet; when the temperature of the third hot fluid flowing out of the second hot fluid outlet is greater than or equal to a temperature threshold, the third hot fluid is transported to the third heat exchange device for heat exchange; when the temperature of the third hot fluid flowing out of the second hot fluid outlet is less than the temperature threshold, the third hot fluid is transported to the coolant inlet via the second return pipe.

7. The fuel cell heat exchange system according to claim 6, wherein: The third heat exchange device includes a third hot fluid inlet, a third hot fluid outlet, a third cold fluid inlet and a third cold fluid outlet; The third thermal fluid inlet is connected to the second thermal fluid outlet to receive the third thermal fluid; A third cold fluid flows in through the third cold fluid inlet and exchanges heat with the third hot fluid; the third cold fluid after heat exchange flows out through the third cold fluid outlet; The third thermal fluid is used to obtain a fourth thermal fluid after heat exchange, and the fourth thermal fluid flows out through the third thermal fluid outlet.

8. The fuel cell heat exchange system according to claim 7, wherein: The fuel cell heat exchange system further includes: a second cooling device, the second cooling device being connected to the third hot fluid outlet; when the temperature of the fourth hot fluid is greater than or equal to a second temperature threshold, the second cooling device cools the fourth hot fluid, When the temperature of the fourth thermal fluid is lower than the second temperature threshold, the fourth thermal fluid is transported to the coolant inlet via a third return pipe.

9. The fuel cell heat exchange system according to claim 7, wherein: The material of the pipe through which the first thermal fluid flows is determined according to the temperature range of the first thermal fluid; and / or The material of the pipe through which the second thermal fluid flows is determined according to the temperature range of the second thermal fluid; and / or The material of the pipe through which the third thermal fluid flows is determined according to the temperature range of the third thermal fluid.

10. A multifunctional cabin comprising: Multifunctional cabin body; as well as The fuel cell heat exchange system according to any one of claims 1 to 9, Wherein, the fuel cell supplies power to the multifunctional cabin body; The first cold fluid after heat exchange provides thermal energy to the multifunctional cabin body.

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