Heat pipe type intercooler structure of hydrogen fuel cell system

Abstract

The utility model provides a heat pipe type intercooler structure of a hydrogen fuel cell system, and belongs to the technical field of hydrogen fuel cell engines. Comprising a shell; the fixed partition plate is arranged in the shell and divides the shell into a sealed upper water chamber and a sealed lower air chamber; wherein a heat conduction heat pipe is arranged on the fixed partition plate, the heat conduction heat pipe vertically extends to penetrate through the fixed partition plate, the end, located in the upper water chamber, of the heat conduction heat pipe is a heat pipe condensation end, and the end, located in the lower air chamber, of the heat conduction heat pipe is an evaporation end. A fin heat exchange structure in the prior art is replaced with the heat pipes, the heat pipe partition plates are made of aluminum oxide ceramics, the use amount of metal materials, especially aluminum products, is effectively reduced, and the precipitation amount of metal aluminum ions is fundamentally reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen fuel cell engines, and in particular relates to a heat pipe type intercooler structure of a hydrogen fuel cell system. Background Art

[0002] At present, the most widely used in fuel cell systems is the water-cooled countercurrent intercooler. Figure 1 This is a schematic diagram of heat exchange of a water-cooled countercurrent intercooler in the prior art. The heat exchange process of a water-cooled countercurrent intercooler is a traditional wall-to-wall heat transfer method. The heat exchange efficiency of this heat exchange method is closely related to the heat exchange area. The larger the heat exchange area, the better the heat exchange effect. However, for fuel cells, the larger the metal heat exchange surface, the larger the area of ​​contact between the metal and the coolant, the more metal aluminum ions are produced, and the conductivity of the overall cooling system is increased, which means a greater safety risk. The main heat exchange area of ​​the water-cooled countercurrent intercooler is made of metal aluminum, and there are a large number of heat dissipation fin structures. The heat dissipation fins are immersed in the coolant for a long time, which will precipitate metal aluminum ions, increase the conductivity of the overall cooling system, and endanger the vehicle and personal safety in serious cases. In addition, the water-cooled countercurrent intercooler has a complex structure and is not easy to repair. If there is a leak or seepage inside, it cannot be found.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0004] In order to solve the technical problems of low safety factor, complex structure and difficult maintenance of water-cooled countercurrent intercoolers in the prior art, a heat pipe intercooler structure for a hydrogen fuel cell system is provided.

[0005] The technical solution of the utility model is as follows:

[0006] A heat pipe intercooler structure for a hydrogen fuel cell system, comprising:

[0007] case;

[0008] A fixed partition, which is arranged inside the shell to divide the shell into a sealed upper water chamber and a lower air chamber;

[0009] Among them, a heat-conducting heat pipe is provided on the fixed partition, and the heat-conducting heat pipe extends vertically through the fixed partition. The heat-conducting heat pipe end located in the upper water chamber is the heat pipe condensation end, and the heat-conducting heat pipe end located in the lower air chamber is the heat pipe evaporation end.

[0010] In some embodiments, the heat-conducting heat pipe is a closed structure at both ends, and the number of the heat-conducting heat pipes is several.

[0011] In some embodiments, the inner wall of the heat pipe is provided with a plurality of heat absorbing cores along the pipe axis, and the heat absorbing cores are filled with heat absorbing liquid. The heat absorbing liquid is preferably a general fuel cell coolant with a boiling point greater than 100° C., such as ethylene glycol coolant.

[0012] In some embodiments, the upper water chamber is provided with a water inlet at one end and a water outlet at the other end.

[0013] In some embodiments, the lower air chamber is provided with an air inlet at one end and an air outlet at the other end.

[0014] In some embodiments, the upper water chamber and the lower air chamber are connected to the fixed partition by bolts.

[0015] In some embodiments, the upper water chamber and the lower air chamber are sealed from the fixed partition by a sealing ring.

[0016] In some embodiments, the upper water chamber and the lower air chamber are made of nylon with added glass fiber.

[0017] In some embodiments, the fixed partition is made of alumina ceramics.

[0018] Another aspect of the utility model provides a hydrogen fuel cell system, comprising the heat pipe intercooler structure described above.

[0019] Compared with the prior art, the technical effects achieved by the utility model are as follows:

[0020] (1) The heat pipe intercooler structure of the hydrogen fuel cell system provided by the utility model replaces the fin heat exchange structure in the prior art with a heat pipe, which greatly reduces the contact area with the coolant and generates fewer metal ions. Alumina ceramic is used as the heat pipe partition, which can not only ensure the thermal conductivity of the material, but also play the role of fixing the heat pipe, and can also reduce the use of metal materials, especially aluminum products, fundamentally reduce the precipitation of metal aluminum ions, reduce the electrical conductivity of the cooling system, prevent the failure of the single deionizer and the shutdown of the hydrogen fuel cell engine, and make the entire system safer.

[0021] (2) The utility model simplifies the overall structure of the intercooler, changing the prior art in which the fins are completely immersed in the coolant for a long time, including the above-mentioned water chamber and the lower air chamber. The liquid in the liquid absorption core inside the heat pipe absorbs the heat from the air side at the evaporation end of the heat pipe, undergoes a phase change, evaporates into steam and flows to the condensation end of the heat pipe. The steam dissipates heat to the coolant side at the condensation end of the heat pipe, condenses into liquid again, and then flows back to the evaporation end of the heat pipe under gravity, thereby performing a reciprocating heat transfer. Its thermal conductivity is several times that of ordinary metal materials.

[0022] (3) The upper water chamber and the lower air chamber are made of PA+GF material (nylon material with added glass fiber), which ensures heat resistance and strength while reducing the use of metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of heat exchange of a water-cooled counter-flow intercooler in the prior art;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the heat pipe intercooler in Example 1 of the utility model;

[0025] Figure 3 This is a schematic diagram of a half-section structure of a heat pipe intercooler in Embodiment 1 of the present utility model;

[0026] Figure 4 This is a schematic diagram of the installation structure of the fixed baffle of the heat pipe intercooler in Example 1 of the utility model;

[0027] Figure 5 This is a schematic diagram of the heat pipe distribution structure of the heat pipe type intercooler in Example 1 of the utility model (I);

[0028] Figure 6 This is a schematic diagram of the heat pipe distribution structure of the heat pipe type intercooler in Example 1 of the utility model (II);

[0029] In the figure:

[0030] 100-upper water chamber; 101-water inlet; 102-water outlet;

[0031] 200-lower air chamber; 201-air inlet; 202-air outlet;

[0032] 300-Fixed partition;

[0033] 400-thermal heat pipe;

[0034] 501-upper shell sealing gasket; 502-lower shell sealing gasket. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is described below by means of specific embodiments in conjunction with the accompanying drawings. It should be understood that one or more steps mentioned in the present invention do not exclude the existence of other methods and steps before and after the combination step, or other methods and steps can be inserted between these explicitly mentioned steps. It should also be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. Unless otherwise specified, the numbering of each method step is only for the purpose of identifying each method step, and does not limit the order of arrangement of each method or the scope of implementation of the present invention. Changes or adjustments in their relative relationships can also be regarded as the scope of implementation of the present invention without substantial changes in the technical content.

[0036] The sources of the raw materials and instruments used in the examples are not particularly limited and can be purchased from the market or prepared according to conventional methods known to those skilled in the art.

[0037] Example 1

[0038] like Figure 2-6 As shown, a heat pipe intercooler structure of a hydrogen fuel cell system includes:

[0039] case;

[0040] A fixed baffle 300 is arranged inside the shell to divide the shell into a sealed upper water chamber 100 and a lower air chamber 200. The fixed baffle 300 is made of alumina ceramic material, which has extremely high mechanical strength, high corrosion resistance, and high thermal conductivity. It can fix the heat pipe and enhance the heat exchange efficiency.

[0041] A plurality of heat-conducting heat pipes 400 with closed ends pass through the fixed baffle 300 and are evenly fixed on the fixed baffle 300, with three heat-conducting heat pipes arranged in each row (e.g. Figure 2 , Figure 5 , Figure 6 As shown in the figure, the portion of the heat pipe 400 above the fixed partition 300 is the heat pipe condensation end, and the heat pipe 400 below the fixed partition 300 is the heat pipe evaporation end; a plurality of heat absorbing cores (not shown in the figure) are arranged on the inner wall of each heat pipe 400 along the tube axis direction, and the heat absorbing core is filled with heat absorbing liquid;

[0042] The upper water chamber 100 is used for circulating the coolant of the fuel cell. The upper water chamber 100 is located on the upper surface of the fixed baffle 400, and is provided with a water inlet 101 at one end and a water outlet 102 at the other end. The coolant of the fuel cell enters the upper water chamber 100 from the water inlet 101 and leaves the upper water chamber 100 from the water outlet 102. The upper water chamber 100 and the fixed baffle 400 are sealed. A sealing gasket 501 is provided between the shell of the upper water chamber 100 and the fixed baffle 400. The upper water chamber 100 is fixed on the fixed baffle 400 by bolt pressure extrusion, and the sealing between the two is ensured to prevent leakage of the coolant.

[0043] The lower air chamber 200 is used for circulating air. The lower air chamber 200 is located on the lower surface of the fixed partition 400. An air inlet 201 is provided at one end of the lower air chamber 200, and an air outlet 202 is provided at the other end. The high-temperature air flowing through the air compressor enters the lower air chamber 200 from the air inlet 201 and leaves from the air outlet 202 to the fuel cell stack. The lower air chamber 200 and the fixed partition 400 are sealed. A sealing gasket 502 is provided between the shell of the lower air chamber 200 and the fixed partition 400. The lower air chamber 200 is fixed on the fixed partition 400 by bolt pressure extrusion, and the sealing between the two is ensured to prevent leakage of circulating air.

[0044] The condensation end of the heat pipe is located inside the upper water chamber 100 , and the evaporation end of the heat pipe is located inside the lower air chamber 200 .

[0045] A plurality of heat absorbing cores are arranged on the inner wall of the heat-conducting heat pipe along the pipe axis direction, and the heat absorbing cores are filled with heat absorbing liquid for achieving heat conduction.

[0046] The material of the upper water chamber and the lower air chamber is nylon with added glass fiber, which can ensure heat resistance and strength while reducing the use of metal; the material of the fixed partition is alumina ceramic, which can not only ensure the thermal conductivity of the material, but also play the role of fixing the heat pipe and reduce the use of metal materials.

[0047] The heat conduction process of this embodiment is as follows:

[0048] The upper water chamber 100 is the liquid circulation side, and the fuel cell coolant enters the upper water chamber 100 from the water inlet 101 and leaves from the water outlet 102, forming a loop with the external driving components; the lower air chamber 200 is the gas circulation side, and the high-temperature air flowing through the air compressor enters the lower air chamber 200 from the air inlet 201, and leaves from the air outlet 202 to the fuel cell stack; the condensation end of the heat-conducting heat pipe located in the upper water chamber 100 exchanges heat with the coolant, and the evaporation end of the heat-conducting heat pipe located in the lower air chamber 200 absorbs heat from the high-temperature air, and the liquid in the internal liquid absorption core of the heat-conducting heat pipe 400 absorbs the heat from the air side at the evaporation end of the heat pipe to undergo a phase change, evaporates into steam and goes to the condensation end of the heat pipe, dissipates heat to the coolant side at the condensation end of the heat pipe, condenses into liquid again, and then flows back to the evaporation end again under the action of gravity and siphon, so as to transfer heat back and forth, thereby realizing the cooling and heat exchange of the high-temperature air going to the fuel cell stack.

[0049] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A heat pipe intercooler structure for a hydrogen fuel cell system, characterized in that: include: case; A fixed partition, which is arranged inside the shell to divide the shell into a sealed upper water chamber and a lower air chamber; Among them, a heat-conducting heat pipe is provided on the fixed partition, and the heat-conducting heat pipe extends vertically through the fixed partition. The heat-conducting heat pipe end located in the upper water chamber is the heat pipe condensation end, and the heat-conducting heat pipe end located in the lower air chamber is the heat pipe evaporation end.

2. The heat pipe intercooler structure of the hydrogen fuel cell system according to claim 1, characterized in that: The heat-conducting heat pipe is a closed structure at both ends, and the number of the heat-conducting heat pipes is several.

3. The heat pipe intercooler structure of the hydrogen fuel cell system according to claim 2, characterized in that: A plurality of heat absorbing cores are arranged on the inner wall of the heat-conducting heat pipe along the pipe axis direction, and the heat absorbing cores are filled with heat absorbing liquid.

4. The heat pipe intercooler structure of the hydrogen fuel cell system according to claim 1, characterized in that: One end of the upper water chamber is provided with a water inlet, and the other end is provided with a water outlet.

5. The heat pipe intercooler structure of the hydrogen fuel cell system according to claim 1, characterized in that: One end of the lower air chamber is provided with an air inlet, and the other end is provided with an air outlet.

6. The heat pipe intercooler structure of the hydrogen fuel cell system according to claim 1, characterized in that: The upper water chamber and the lower air chamber are connected to the fixed partition plate through bolts.

7. The heat pipe intercooler structure of the hydrogen fuel cell system according to claim 1, characterized in that: The upper water chamber and the lower air chamber are sealed with the fixed partition through a sealing ring.

8. The heat pipe intercooler structure of the hydrogen fuel cell system according to claim 1, characterized in that: The material of the upper water chamber and the lower air chamber is nylon added with glass fiber.

9. The heat pipe intercooler structure of the hydrogen fuel cell system according to claim 1, characterized in that: The fixed partition is made of alumina ceramics.

10. A hydrogen fuel cell system, characterized in that: It comprises the heat pipe intercooler structure as described in any one of claims 1 to 9.

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