Fuel cell engine ventilation system

Abstract

The invention relates to the technical field of new energy, in particular to a fuel cell engine ventilation system which comprises an electric pile module, a first box body, a second box body and a detection device. The first box body, the second box body and the galvanic pile box body jointly define three areas, the side wall of the second box body is provided with the purging inlet, the top of the second box body is provided with the purging outlet, all the areas are independently purged, the purging and ventilation effects are good, and dead areas are avoided; and a detection device is arranged to detect the hydrogen concentration at each purging outlet, so that when internal fuel leaks, the leakage can be found in time, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a ventilation system for a fuel cell engine. Background Art

[0002] Marine hydrogen fuel cell systems have become one of the main solutions for green ship power systems due to their green, efficient and silent characteristics. With the development of integrated power system technology, fuel cell technology will give full play to its unique advantages of high energy efficiency conversion rate, fast start-up and zero emissions, and become the main development direction of new marine power source systems in the future. The fuel cell engine is installed inside the cabin and is in an independent and enclosed space. During the voyage of the ship, a large amount of dust and moisture will adhere to the surface of the fuel cell engine, which poses a huge threat to the normal operation of the fuel cell engine, especially the stack module. Therefore, in order to ensure the safe operation of the ship, it is necessary to design a reasonable ventilation system for the fuel cell engine in the cabin to ensure smooth ventilation.

[0003] The ventilation system in the existing fuel cell engine is to place the stack and other components in the same space, set a purge inlet and a purge outlet on the side of the engine box, and then ventilate the entire space. This setting will make the ventilation of the fuel cell engine unsmooth. Since hydrogen is light, it will gather above the space and cannot be discharged through the purge outlet, forming a ventilation dead zone; and when the internal hydrogen leaks, the ventilation system cannot detect it in time and issue an alarm, which poses a safety hazard. Summary of the invention

[0004] The purpose of the present application is to provide a fuel cell engine ventilation system, which sets multiple ventilation areas, purges each area separately, and sets a detection device to monitor the hydrogen concentration at the ventilation port in real time, thereby ensuring the ventilation effect and improving the safety performance.

[0005] To achieve the above purpose, the present application adopts a fuel cell engine ventilation system, comprising:

[0006] A battery stack module, the battery stack module comprising a battery stack and a battery stack box, the battery stack being arranged in the battery stack box;

[0007] A first box, wherein the stack box is located in the first box, and the first box and the stack box define a first area, and the first area is used to accommodate hydrogen-related components;

[0008] A second box, wherein the first box is located inside the second box, and the second box and the first box define a second area;

[0009] The side walls of the second box are respectively provided with a stack purge inlet, a first purge inlet, and a second purge inlet, and the stack purge inlet and the stack box, the first purge inlet and the first box, and the second purge inlet and the second box are respectively connected through pipelines;

[0010] A stack purge outlet, a first purge outlet, and a second purge outlet are respectively provided on the top of the second box, and the stack purge outlet and the stack box, the first purge outlet and the first box, and the second purge outlet and the second box are respectively connected through pipelines;

[0011] A detection device, wherein a plurality of the detection devices are respectively arranged at the stack purge outlet, the first purge outlet and the second purge outlet, and are used to detect the hydrogen concentration at the stack purge outlet, the first purge outlet and the second purge outlet.

[0012] As a preferred technical solution, the hydrogen-related components include a hydrogen heat exchanger, an ejector and a steam-water separator, the output end of the hydrogen heat exchanger is connected to the ejector, the output end of the ejector is connected to the air inlet of the fuel cell stack, the air outlet of the fuel cell stack is connected to the gas inlet of the steam-water separator, and the gas outlet of the steam-water separator is connected to the air inlet of the fuel cell stack.

[0013] As a preferred technical solution, it also includes a hydrogen interface, which is connected to the input end of the hydrogen heat exchanger through a pipeline, and passes through the first box body and is arranged on the outside of the second box body.

[0014] As a preferred technical solution, it also includes a drain outlet, which is connected to the air outlet of the steam-water separator through a pipeline, and passes through the battery stack box and the first box in sequence and is arranged on the outside of the second box.

[0015] As a preferred technical solution, it also includes an alarm, which is connected to the plurality of hydrogen concentration sensors.

[0016] As a preferred technical solution, it also includes a blower, and a plurality of the blowers are respectively arranged at the stack purge inlet and the second purge inlet, and are used to blow air to the stack box and the second area respectively.

[0017] As a preferred technical solution, it also includes an exhaust fan, which is arranged at the first purge outlet and is used to exhaust air to the first area.

[0018] The present application also provides a fuel cell engine, comprising the fuel cell engine ventilation system as described above.

[0019] A fuel cell engine ventilation system in the present application is provided with a first box body and a second box body, which together with the stack box body define three areas, a purge inlet is provided on the side wall of the second box body, and a purge outlet is provided on the top of the second box body, so that each area is purged separately, the purge and ventilation effects are good, and the existence of dead zones is avoided; a detection device is also provided to detect the hydrogen concentration at each purge outlet, so that when the internal fuel leaks, it can be discovered in time to reduce safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present application is further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present application. In addition, unless otherwise specified, the drawings are intended only to conceptually represent the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0021] Figure 1 It is a schematic diagram of the purge path of the present invention;

[0022] Figure 2 is a side view of the present invention;

[0023] Figure 3 It is a front view of the present invention;

[0024] Among them: 1. Fuel cell module; 11. Fuel cell box; 2. First box; 21. Hydrogen-related components; 22. First purge inlet; 23. First purge outlet; 3. Second box; 31. Second purge inlet; 32. Second purge outlet; 33. Hydrogen interface; 34. Drain outlet; 4. Detection device. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of the present application, it should be understood that the terms "front", "rear", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0027] See also Figure 1-3 , a fuel cell engine ventilation system provided in an embodiment of the present application, comprising:

[0028] A battery stack module 1, wherein the battery stack module 1 comprises a battery stack and a battery stack box 11, wherein the battery stack is arranged in the battery stack box 11;

[0029] A first box 2, wherein the stack box 11 is located in the first box 2, and the first box 2 and the stack box 11 define a first area, and the first area is used to accommodate hydrogen-related components 21;

[0030] A second box body 3, wherein the first box body 2 is located in the second box body 3, and the second box body 3 and the first box body 2 define a second area;

[0031] The side walls of the second box body 3 are respectively provided with a stack purge inlet, a first purge inlet 22, and a second purge inlet 31. The stack purge inlet and the stack box body 11, the first purge inlet 22 and the first box body 2, and the second purge inlet 31 and the second box body 3 are respectively connected through pipelines.

[0032] The top of the second box 3 is respectively provided with a stack purge outlet, a first purge outlet 23 and a second purge outlet 32, and the stack purge outlet and the stack box 11, the first purge outlet 23 and the first box 2, and the second purge outlet 32 ​​and the second box 3 are respectively connected through pipelines;

[0033] A detection device 4 , wherein a plurality of the detection devices 4 are respectively arranged at the stack purge outlet, the first purge outlet 23 and the second purge outlet 32 ​​, and are used to detect the hydrogen concentration at the stack purge outlet, the first purge outlet 23 and the second purge outlet 32 ​​.

[0034] In this embodiment, a double box and a hydrogen concentration detection device 4 are provided, and the hydrogen-related component 21 is separately provided in the first box 2. When the fuel leaks, the leaked gas gathers in the first box 2, and the detection device 4 at the first purge outlet 23 issues a warning, and the first purge outlet 23 quickly discharges the gas in the first area. This method can effectively reduce the fuel leakage area, improve the discharge efficiency of the leaked gas, and increase the safety of the system. The first purge inlet 22, the second purge inlet 31, and the stack purge inlet are all located on the side wall of the second box 3. When purging, the air blown into each purge inlet can effectively purge the gas in the area from bottom to top. When purging, the hydrogen gathers at the top of the box due to its light weight. At this time, the first purge outlet 23, the second purge outlet 32, and the stack purge outlet provided on the top surface of the second box 3 can completely discharge the hydrogen gathered at the top of the box to avoid the existence of ventilation dead zones and affect the ventilation effect.

[0035] As a preferred technical solution, the hydrogen-related component 21 includes a hydrogen heat exchanger, an ejector and a steam-water separator. The output end of the hydrogen heat exchanger is connected to the ejector, the output end of the ejector is connected to the air inlet of the stack, the air outlet of the stack is connected to the gas inlet of the steam-water separator, and the gas outlet of the steam-water separator is connected to the air inlet of the stack. When the fuel leaks, the fuel cell engine mostly leaks gas from the above hydrogen-related components 21 and the stack. In this solution, the above hydrogen-related components 21 and the stack module 1 are both arranged in the first box 2 and isolated from other components. When leaking, the entire system is divided into a leakage zone and a normal zone, and each area is ventilated in a targeted manner, which effectively improves the ventilation efficiency and improves the safety performance of the system.

[0036] As a preferred technical solution, a hydrogen interface 33 is also included, which is connected to the input end of the hydrogen heat exchanger through a pipeline, and passes through the first box 2 and is arranged on the outside of the second box 3. The hydrogen interface 33 is completely isolated from the second area by the pipeline to prevent hydrogen from leaking into the second area, which poses a safety hazard.

[0037] As a preferred technical solution, it also includes a drain port 34, which is connected to the air outlet of the steam-water separator through a pipeline, and sequentially passes through the stack box 11 and the first box 2 to the outside of the second box 3. The drain port 34 is completely isolated from the first and second areas through the pipeline to prevent water from flowing into the first and second boxes 3 through the pipeline during the discharge process, affecting system performance.

[0038] As a preferred technical solution, an alarm is also included, and the alarm is connected to the plurality of detection devices 4. The alarm can alarm the abnormal hydrogen concentration detected by the detection device 4, so that the crew can find the fuel leakage in time and reduce the safety hazard.

[0039] As a preferred technical solution, it also includes a blower, and a plurality of the blowers are respectively arranged at the stack purge inlet and the second purge inlet 31, and are used to blow air to the stack box 11 and the second area respectively. It also includes an exhaust fan, which is arranged at the first purge outlet 23 and is used to exhaust air to the first area.

[0040] In this embodiment, a blower is used to purge the battery stack module 1 and the second area, and an exhaust fan is used to purge the first area, so as to generate a pressure difference between the first area and the second area and between the first area and the battery stack module 1, thereby accelerating the purge speed and improving the ventilation efficiency.

[0041] The present application also provides a fuel cell engine, including the fuel cell engine ventilation system as described above, which can effectively ventilate the fuel cell engine to ensure the safe operation of the fuel cell engine.

[0042] In summary, the fuel cell engine ventilation system provided in this embodiment divides the fuel cell engine into three areas, and ventilates each area separately, and a hydrogen concentration detection device is provided at the purge outlet, which improves the safety performance of the engine while ensuring the ventilation effect.

[0043] This specification discloses the present application with reference to the accompanying drawings, and also enables those skilled in the art to implement the present application, including making and using any device or system, using suitable materials, and using any combined method. The scope of the present application is defined by the technical solution for protection, and includes other examples that occur to those skilled in the art. As long as such other examples include structural elements that are not different from the literal language of the technical solution for protection, or such other examples contain equivalent structural elements that are not substantially different from the literal language of the technical solution for protection, such other examples should be considered to be within the scope of protection determined by the technical solution for protection of the present application.

Claims

1. A fuel cell engine ventilation system, characterized in that: include: A battery stack module, the battery stack module comprising a battery stack and a battery stack box, the battery stack being arranged in the battery stack box; A first box, wherein the stack box is located in the first box, and the first box and the stack box define a first area, and the first area is used to accommodate hydrogen-related components; A second box, wherein the first box is located inside the second box, and the second box and the first box define a second area; The side walls of the second box are respectively provided with a stack purge inlet, a first purge inlet, and a second purge inlet, and the stack purge inlet and the stack box, the first purge inlet and the first box, and the second purge inlet and the second box are respectively connected through pipelines; A stack purge outlet, a first purge outlet, and a second purge outlet are respectively provided on the top of the second box, and the stack purge outlet and the stack box, the first purge outlet and the first box, and the second purge outlet and the second box are respectively connected through pipelines; A detection device, wherein a plurality of the detection devices are respectively arranged at the stack purge outlet, the first purge outlet and the second purge outlet, and are used to detect the hydrogen concentration at the stack purge outlet, the first purge outlet and the second purge outlet.

2. The fuel cell engine ventilation system according to claim 1, characterized in that: The hydrogen-related components include a hydrogen heat exchanger, an ejector and a steam-water separator. The output end of the hydrogen heat exchanger is connected to the ejector, the output end of the ejector is connected to the air inlet of the fuel cell stack, the air outlet of the fuel cell stack is connected to the gas inlet of the steam-water separator, and the gas outlet of the steam-water separator is connected to the air inlet of the fuel cell stack.

3. The fuel cell engine ventilation system according to claim 2, characterized in that: It also includes a hydrogen interface, which is connected to the input end of the hydrogen heat exchanger through a pipeline and passes through the first box body and is arranged on the outside of the second box body.

4. The fuel cell engine ventilation system according to claim 3, characterized in that: It also includes a drain outlet, which is connected to the air outlet of the steam-water separator through a pipeline, and passes through the battery stack box and the first box in sequence and is arranged on the outside of the second box.

5. The fuel cell engine ventilation system according to claim 1, characterized in that: The device also includes an alarm connected to the plurality of hydrogen concentration sensors.

6. The fuel cell engine ventilation system according to claim 1, characterized in that: It also includes a blower, and a plurality of the blowers are respectively arranged at the stack purge inlet and the second purge inlet, and are used to blow air to the stack box and the second area respectively.

7. The fuel cell engine ventilation system according to claim 6, characterized in that: It also includes an exhaust fan, which is arranged at the first purge outlet and is used to exhaust air to the first area.

8. A fuel cell engine, characterized in that: Comprising the fuel cell engine ventilation system as described in claims 1-7.

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