CN115441004A - Cooling noise reduction device, fuel cell system and fuel cell automobile - Google Patents
Cooling noise reduction device, fuel cell system and fuel cell automobile Download PDFInfo
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- CN115441004A CN115441004A CN202211193099.2A CN202211193099A CN115441004A CN 115441004 A CN115441004 A CN 115441004A CN 202211193099 A CN202211193099 A CN 202211193099A CN 115441004 A CN115441004 A CN 115441004A
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- 238000001816 cooling Methods 0.000 title claims abstract description 127
- 230000009467 reduction Effects 0.000 title claims abstract description 57
- 239000000446 fuel Substances 0.000 title claims abstract description 41
- 238000005192 partition Methods 0.000 claims abstract description 26
- 230000030279 gene silencing Effects 0.000 claims abstract description 16
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 210000001503 joint Anatomy 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000011358 absorbing material Substances 0.000 claims description 3
- 239000002826 coolant Substances 0.000 description 20
- 230000000694 effects Effects 0.000 description 19
- 239000003638 chemical reducing agent Substances 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
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- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
- B60L50/72—Constructional details of fuel cells specially adapted for electric vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
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Abstract
The invention provides a cooling and noise reducing device, a fuel cell system and a fuel cell automobile, wherein the cooling and noise reducing device comprises a main body which is cylindrical and is provided with a first partition plate and a second partition plate for separating a cavity, a cooling cavity and a silencing cavity; the air inlet pipe extends along the axial direction, the first end is positioned outside the first end of the main body, the second end penetrates through the cavity and is arranged in a closed mode, a plurality of groups of first air hole groups which are positioned in the cavity and distributed along the axial direction are arranged on the air inlet pipe, each first air hole group comprises a plurality of first air holes distributed along the first circumferential direction of the air inlet pipe, and the first air holes are communicated with the cavity and the air inlet pipe; the spiral pipe group is positioned in the cooling cavity, a first end of a spiral pipe of the spiral pipe group is communicated with the cavity, and a second end of the spiral pipe is communicated with the silencing cavity; the air outlet pipe is communicated with the silencing cavity; the cooling cavity is communicated with the feeding pipe and the discharging pipe. The fuel cell system and the fuel cell automobile are both provided with the cooling and noise reduction device, and the cooling and noise reduction device has the functions of heat exchange, noise reduction and pressure drop reduction.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a cooling noise reduction device, a fuel cell system with the cooling noise reduction device and a fuel cell automobile.
Background
Fuel cell stacks of fuel cell vehicles require an air compressor to deliver air to participate in chemical reactions to produce electrical energy. Wherein, the gas discharged by the air compressor can not be subjected to effective chemical reaction until reaching a certain temperature, and the exhaust noise needs to be reduced as much as possible; in addition, if the air compressor is in multi-stage compression, an interstage cooling device is required to be arranged so as to improve the energy efficiency of the compressor and reduce exhaust noise, and therefore the purposes of energy conservation and environmental protection are achieved.
However, the existing cooling and noise reduction devices generally focus on heat exchange cooling or noise reduction, and generally cannot simultaneously take heat exchange and noise reduction into consideration, and the cooling and noise reduction devices with small-interval heat exchange and noise reduction functions usually ignore the pressure drop loss of the cooling and noise reduction devices, especially the pressure attenuation caused by the sudden and large reduction of the local flow area, and the situation can also cause the attenuation of the energy consumption of an upstream air supply device; thus, existing cooling noise reducers still have a large space to improve.
Disclosure of Invention
In order to solve the above problems, the present invention provides a cooling noise reduction device with heat exchange, noise reduction and pressure drop reduction functions.
Another object of the present invention is to provide a fuel cell system provided with the above cooling and noise reducing device.
It is still another object of the present invention to provide a fuel cell vehicle provided with the above fuel cell system.
In order to achieve the main purpose of the invention, the invention provides a cooling and noise reduction device which is characterized by comprising a main body, an air inlet pipe, a spiral pipe group, an air outlet pipe, an air inlet pipe and a discharge pipe, wherein the main body is cylindrical, the main body is provided with a cavity, a cooling cavity and a noise reduction cavity which are sequentially distributed along the axial direction of the main body, a first partition plate is arranged between the cavity and the cooling cavity, a second partition plate is arranged between the cooling cavity and the noise reduction cavity, the air inlet pipe extends along the axial direction, the first end of the air inlet pipe is positioned outside the first end of the main body, the second end of the air inlet pipe penetrates through the cavity, a plurality of groups of first air hole groups positioned in the cavity are arranged on the air inlet pipe and distributed along the axial direction, the first air hole groups comprise a plurality of first air holes distributed along the first circumferential direction of the air inlet pipe, the first air holes are communicated with the cavity and the first end of the air inlet pipe, the second end of the air inlet pipe is closed, the spiral pipe group is positioned in the cooling cavity, the first end of the spiral pipe is connected with the first partition plate and communicated with the cavity, the second end of the spiral pipe group is communicated with the noise reduction pipe, the discharge pipe, the air outlet pipe and communicated with the feed pipe.
Therefore, through the structural design of the cooling and noise reducing device, a plurality of Helmholtz resonators connected in series are formed between the first air holes of each first air hole group on the air inlet pipe and the cavity, so that the flow noise of the air is effectively reduced; the gas in the cavity enters the silencing cavity through the spiral pipe, so that the gas is fully subjected to heat exchange with a cooling medium in the cooling cavity when passing through the spiral pipe, the temperature of the gas is further reduced, and the gas with the reduced temperature is discharged to a fuel cell through the gas outlet pipe; the inlet pipe is used for leading-in cooling medium cooling chamber, and the discharging pipe is used for leading-out cooling medium cooling chamber, and then makes the cooling medium in the cooling chamber keep at a lower temperature, guarantees that the gaseous and cooling medium through the screwed pipe carry out abundant heat exchange, makes the temperature of gas obtain effectual reduction.
In a preferred embodiment, the maximum distribution height of the first group of gas holes is between one half and four fifths of the height of the cavity in the axial direction; the total area of the first air holes is between 0.85 and 1.1 times of the flow area of the air inlet pipe.
Therefore, the cooling noise reduction device can better eliminate gas noise due to the design.
Further, the aperture setting of the first air hole satisfies the following formula:
L′＝0.85d p + L, where a is sound velocity, S is cross-sectional area of the first air hole, L is wall thickness of the air inlet pipe, L' is acoustic length corresponding to wall thickness of the air inlet pipe, and d p The aperture of the first air hole; the number of the first air holes of each group of the first air hole groups is set to satisfy the following formula:
in the formula, R p Is the perforation rate, n is the number of first air holes, d p Is the diameter of the first pores, D in Is the pipe diameter of the inlet pipe l p Is the perforation length of the air inlet pipe.
Therefore, the design can effectively reduce the noise of the gas, simultaneously avoid the overlarge pressure drop of the gas,
another preferred scheme is that the cooling and noise reduction device comprises a hollow pipe, the first end of the hollow pipe is in butt joint with the second end wall of the air inlet pipe, the second end of the hollow pipe is located in the silencing cavity and is in butt joint with the second end wall of the main body, the threaded pipe is connected with the outer peripheral wall of the hollow pipe, the second end of the air inlet pipe penetrates through the cavity and extends into the cooling cavity, and the air outlet pipe extends along the radial direction of the main body.
The arrangement of the hollow pipe enables the threaded pipe to be fixed on the hollow pipe, so that the stability of the whole structure and the firmness of installation of the threaded pipe are guaranteed, the threaded pipe is prevented from shaking in the use process of the cooling and noise reducing device, the noise is further reduced, and meanwhile, the design of the hollow pipe can also play a certain auxiliary heat dissipation role, so that the cooling effect on gas is improved; in addition, the air outlet pipe is arranged to extend in the radial direction, on one hand, the cooling and noise reduction device can be arranged at the position of an interior corner of a vehicle to improve the utilization rate of space in the vehicle, and on the other hand, according to the transmission characteristic of sound waves in the cavity, the structural layout of the air inlet pipe and the air outlet pipe can be more favorable for reducing the gas noise from the upstream.
Another preferred scheme is that the second end of the air inlet pipe extends to the second partition plate, the air outlet pipe and the air inlet pipe are coaxially arranged, the first end of the air outlet pipe is located outside the main body, the second end of the air outlet pipe is in butt joint with the second end wall of the air inlet pipe, a plurality of groups of second air hole groups located in the silencing cavity are arranged on the air outlet pipe and distributed along the axial direction, each second air hole group comprises a plurality of second air holes distributed along the second circumferential direction of the air outlet pipe, and the second air holes are communicated with the silencing cavity and the second end of the air outlet pipe.
It is from top to bottom visible, through the structural configuration to the outlet duct for the cooling noise reduction device can more interior spatial position of adaptation, and sets up the second gas pocket group on the outlet duct, can further promote the noise reduction effect of cooling noise reduction device.
Another preferred scheme is that the number of the spiral pipes is more than two, and the more than two spiral pipes are distributed along the first circumferential direction; the spiral pipe is a cylindrical spiral pipe or a conical spiral pipe, the curvature radius of the conical spiral pipe is gradually reduced from the first partition plate to the second partition plate, and the taper of the conical spiral pipe is between 5 degrees and 35 degrees; the total flow area of the two or more spiral pipes is between 0.8 and 1 times of the flow area of the air inlet pipe.
Therefore, by arranging the number of the spiral pipes, the contact area between the gas and the cooling medium can be increased, so that the heat exchange efficiency of the gas is improved, and the cooling effect of the gas is improved; the spiral pipe is arranged to enable the gas to highly flow in the spiral pipe, and when the spiral pipe is further arranged to be a conical spiral pipe, the flow speed of the gas in the spiral pipe can be further improved.
The further scheme is that each first air hole is internally provided with a vent pipe, the first end of each vent pipe is positioned in the air inlet pipe, and the second end of each vent pipe is positioned in the cavity.
From top to bottom, the setting of breather pipe can further increase the noise cancelling effect of helmholtz resonator, and through the length of adjusting the breather pipe, can realize adjusting the low frequency of noise elimination.
A sound absorption cavity is arranged in the cooling cavity, and a sound absorption material is arranged in the sound absorption cavity; the inlet pipe is close to the setting of second baffle, and the discharging pipe is close to first baffle setting.
Therefore, the sound-absorbing chamber can further eliminate noise; and the position setting through the discharging pipe to the inlet pipe for coolant can be more abundant contact with the gas in the spiral pipe, and then promote the heat transfer effect of coolant and gas.
In order to achieve another object of the present invention, the present invention provides a fuel cell system, which comprises an air compressor and a fuel cell, and further comprises the above cooling and noise reducing device, wherein the air inlet pipe is butted with the air compressor, and the air outlet pipe is butted with the fuel cell.
Therefore, the fuel cell system provided with the cooling and noise reduction device can better cool and reduce noise of gas discharged by the air compressor, and avoids overlarge pressure drop loss of the gas.
In order to achieve still another object of the present invention, the present invention provides a fuel cell vehicle including the fuel cell system described above.
Therefore, the fuel cell automobile provided with the fuel cell system can better cool and reduce noise of gas discharged by the air compressor, and avoids overlarge pressure drop loss of the gas.
Drawings
Fig. 1 is a structural view of a first embodiment of a cooling noise reduction device of the present invention.
Fig. 2 is a cross-sectional view of a first embodiment of a cooling noise reducer of the present invention from a first perspective.
Fig. 3 is an enlarged view of a point a in fig. 2.
FIG. 4 is a graph illustrating the effect of the puncturing rate parameter on the cooling noise reducer according to the first embodiment of the present invention.
FIG. 5 shows 20lg (t) of the first embodiment of the cooling noise reducer according to the present invention I ) -histogram (t) I Transmission coefficient of sound wave).
Fig. 6 is a cross-sectional view of the first embodiment of the cooling and noise reducing arrangement of the present invention from a second perspective.
Fig. 7 is a cross-sectional view of the first embodiment of the cooling and noise reducing arrangement of the present invention from a third perspective.
Fig. 8 is a pressure pulsation attenuation comparison diagram of the first embodiment of the cooling noise reducer according to the present invention.
Fig. 9 is a velocity vector diagram of the first embodiment of the cooling and noise reduction apparatus of the present invention.
Fig. 10 is a temperature distribution diagram of the first embodiment of the cooling noise reducer according to the present invention.
Fig. 11 is a cross-sectional view of a second embodiment of a cooling noise reducer of the present invention.
Fig. 12 is a cross-sectional view of a third embodiment of a cooling noise reducer of the present invention.
Fig. 13 is a cross-sectional view of a fourth embodiment of a cooling noise reducer of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
First embodiment of Cooling noise reduction device
Referring to fig. 1 and 2, the cooling and noise reducing device 100 is used to be installed between an air compressor and a fuel cell to cool and reduce noise of high-temperature and high-pressure gas discharged from the air compressor, and to prevent excessive pressure drop loss of the cooled and noise-reduced gas. The cooling and noise reducing device 100 includes a main body 1, an inlet pipe 21, an outlet pipe 22, a spiral pipe group 3, a feed pipe 41, and a discharge pipe 42.
With reference to fig. 3, the air inlet tube 21 extends in the axial direction Z, a first end of the air inlet tube 21 being located outside the body 1, and a second end of the air inlet tube 21 passing through the cavity 11. The first end of the intake pipe 21 has a first opening that communicates with a first flow passage in the intake pipe 21, and the second end of the intake pipe 21 has a second end wall to close the second end of the intake pipe 21. Preferably, in the present embodiment, the second end wall of the inlet pipe 21 is located inside the cooling chamber 12, and the second end wall of the inlet pipe 21 is disposed near the first partition 14.
The air inlet pipe 21 is provided with a plurality of first air hole groups 211, the plurality of first air hole groups 211 are all located in the cavity 11, and the plurality of first air hole groups 211 are distributed along the axial direction Z. Each set of first air holes 211 comprises a plurality of first air holes 2111, the plurality of first air holes 2111 are distributed along a first circumferential direction of the air inlet pipe 21, and the first air holes 2111 communicate the cavity 11 with a first flow passage in the air inlet pipe 21, so that the cavity 11 can communicate with a first opening of the air inlet pipe 21 through the first flow passage and the first air holes 2111. Preferably, the plurality of first air holes 2111 of the same set of first air hole groups 211 are equally spaced in the first circumferential direction of the intake pipe 21, and the plurality of sets of first air hole groups 211 are equally spaced in the axial direction Z.
Through the structural design to intake pipe 21 for form a plurality of helmholtz resonators of establishing ties between the first gas pocket 2111 of each first gas pocket group 211 and cavity 11 on intake pipe 21, and then effectual reduction gas flow noise. Preferably, in the axial direction Z, the maximum distribution height H of the first group of gas holes 211 is comprised between one half and four fifths of the height H of the cavity 11; and the total area of the first air holes 2111 is between 0.85 and 1.1 times the flow area of the air inlet pipe 21 (i.e., the area surrounded by the inner pipe wall of the air inlet pipe 21 on the connecting surface of the air inlet pipe 21), so as to avoid excessive pressure drop loss. Wherein the first gas holes 2111 of the same group of first gas hole groups 211 have the same hole diameter; the diameters of the pores in the two adjacent first pore groups 211 may be equal or unequal.
The pore diameter of the first pores 2111 satisfies the following formula:
helmholtz resonator resonance frequency calculation formula]，L′＝0.85d p + L [ formula (2)]Where a is the speed of sound, S is the cross-sectional area of the first air hole 2111, L is the wall thickness of the inlet tube 21, L' is the acoustic length corresponding to the wall thickness of the inlet tube 21, d p The aperture of the first air vent 2111; the number of the first air holes 2111 of each set of the first air hole group 211 is set to satisfy the following formula:
in the formula, R p For the perforation rate, n is the number of first air holes 2111, d p Is the diameter of the first air hole 2111, D in Is the pipe diameter of the inlet pipe 21 l p Is the perforation length of the intake pipe 21. The size of the first air hole 2111 can be adjusted according to the formula (1) to eliminate noise with different frequencies. Further, the perforation ratio R p The influence on the parameters is shown in FIG. 4, where n is the number of the first air holes 2111 of the intake pipe 21 and d is the diameter of the first air holes 2111 p All in accordance with the perforation rate R p In positive correlation, and the pipe diameter D of the air inlet pipe 21 in And the perforation length l of the intake pipe 21 p And presents negative correlation.
The outlet pipe 22 communicates with the sound-deadening chamber 13, and in this embodiment, the outlet pipe 22 extends in the radial direction X of the main body 1. The air inlet pipe 21 is arranged to be parallel to the axial direction Z of the main body 1, and the air outlet pipe 22 is arranged to be parallel to the radial direction X of the main body 1, so that the structure of axial Z air inlet and radial X air outlet is realized; this structural design makes on the one hand cooling and noise reduction device 100 can set up in the corner department of automobile body as type elbow structure to improve the utilization ratio of automobile interior space, and on the other hand, according to the transmission characteristic (as shown in fig. 5) of sound wave in the cavity, above-mentioned structural design can also be better reduce the exhaust noise of coming the gas upper reaches, because according to the plane fluctuation theory, this structural design has better resistance noise cancelling effect than the structure that the axial Z advances exhaust, and can know through fig. 5, adopt the structure that the axial Z advances air, radial X exhausts, the transmission coefficient is the most sensitive to the change of frequency, along with the improvement of sound wave frequency, its attenuation effect to the sound wave is the most obvious.
Referring to fig. 6 and 7, the coil assembly 3 is located in the cooling chamber 12, and the coil assembly 3 preferably includes two or more coils 31, and the two or more coils 31 are distributed along the first circumferential direction of the intake pipe 21. The spiral pipe 31 can increase the flow velocity of the gas, and meanwhile, the cooling medium in the cooling cavity 12 can also be circulated in a spiral manner, so that the high-temperature gas flows in the spiral pipe 31, the cooling medium flows outside the spiral pipe 31, and a double-spiral flow channel structure of internal and external cold and hot flows is formed, thereby increasing the heat exchange area of the gas and the cooling medium, improving the flow velocity, and further effectively improving the heat exchange efficiency. And set up through the quantity to coil 31, then can further increase gaseous and coolant's area of contact to better improvement is to gaseous heat exchange efficiency, promotion to gaseous cooling effect.
The first end of the spiral tube 31 of the spiral tube group 3 is connected with the first clapboard 14 and is communicated with the cavity 11, and the nozzle of the first end of the spiral tube 31 is preferably formed on the first clapboard 14; the second end of the spiral pipe 31 is connected to the second partition 15 and communicates with the sound-deadening chamber 13, and the mouth of the second end of the spiral pipe 31 is preferably formed on the second partition 15. Preferably, the first end orifice of the spiral pipe 31 is in smooth transition with the first partition plate 14, and the second end orifice of the spiral pipe 31 is in smooth transition with the second partition plate 15, so that the local resistance is effectively reduced.
Further, a hollow tube 16 is disposed in the main body 1, and the hollow tube 16 and the air inlet tube 21 are disposed coaxially. The first end of the hollow tube 16 is butted with the second end wall of the air inlet pipe 21, the second end of the hollow tube 16 is positioned in the sound-deadening cavity 13, and the second end of the hollow tube 16 is butted with the second end wall in the axial direction Z of the main body 1, so that the hollow tube 16 is isolated from the cavity 11, the cooling cavity 12, the sound-deadening cavity 13 and the air inlet pipe 21. The screwed pipe is connected with the periphery wall of hollow tube 16, and hollow tube 16's setting makes the screwed pipe can be fixed in on the hollow tube 16 to guarantee overall structure's stability and the fastness of screwed pipe installation, and avoid cooling to fall and take place to rock in the device 100 use of making an uproar, with further noise reduction, the design of hollow tube 16 can also play certain supplementary radiating effect simultaneously, thereby promotes the cooling effect to gas. Among them, it is preferable to provide a sound absorbing material in the hollow tube 16 to further enhance the noise reduction effect.
Further, the spiral pipe 31 is a cylindrical spiral pipe, or the spiral pipe 31 is a cylindrical spiral pipe. When the conical spiral pipe is used, the curvature radius of the conical spiral pipe is gradually reduced from the first clapboard 14 to the second clapboard 15, and the taper of the conical spiral pipe is between 5 degrees and 35 degrees; when the spiral pipe 31 is configured as a cylindrical spiral pipe, the flow velocity of the gas in the spiral pipe 31 can be further increased, but when the taper of the conical spiral pipe is larger, the flow loss is larger, so that the spiral structure needs to be selected according to actual conditions. In addition, the total flow area of the two or more spiral pipes 31 is between 0.8 times and 1 time the flow area of the intake pipe 21, so as to control the overall pressure drop loss of the cooling and noise reducing device 100.
Further, as shown in fig. 2, a sound absorbing chamber 17 is provided in the cooling chamber 12, and a sound absorbing material 171 is provided in the sound absorbing chamber 17. With the above configuration, the sound absorption and noise reduction effects of the cooling noise reduction device 100 can be further improved.
The feeding pipe 41 and the discharging pipe 42 are respectively communicated with the cooling cavity 12, the feeding pipe 41 is used for guiding cooling media into the cooling cavity 12, the discharging pipe 42 is used for guiding the cooling media out of the cooling cavity 12, and therefore the cooling media in the cooling cavity 12 can be kept at a lower temperature, sufficient heat exchange between gas passing through a threaded pipe and the cooling media is guaranteed, and the temperature of the gas is effectively reduced. Preferably, the feeding pipe 41 is disposed near the second partition 15, and the discharging pipe 42 is disposed near the first partition 14, so that the cooling medium can be more sufficiently contacted with the gas in the spiral pipe 31, and the heat exchange effect between the cooling medium and the gas is further improved.
By installing the cooling and noise reducing device 100 provided by the invention on a connecting pipeline between an air compressor and a fuel cell and comparing the cooling and noise reducing device with a single-container device with a pure cavity inside, the noise reduction effect of the two devices can be evaluated through the attenuation condition of the pressure pulsation of the air flow inside the two devices, and the specific simulation result of the attenuation of the pressure pulsation of the two devices is shown in fig. 8.
In addition, with reference to fig. 9 and 10, it can be known through simulation calculation that the heat exchange effect and the pressure drop condition of the cooling noise reduction device 100 are: in the flowing direction of the main stream high-temperature gas, the gas flow is fully contacted with the cooling medium through the spiral pipe 31, so that the local temperature is effectively reduced, and finally the temperature of the high-temperature gas at the gas outlet pipe 22 is reduced. The result of the flowing heat exchange data with the structure is as follows: the flow rate of the main high-temperature gas is 45m/s, the temperature is 150 ℃, the wall surface temperature is 40 ℃, the temperature of the obtained outlet gas is about 107 ℃, the temperature of the high-temperature gas is reduced by 43 ℃ after passing through the cooling noise reduction device 100, the temperature is obviously reduced, and the pressure difference between the air inlet pipe orifice and the air outlet pipe orifice is only 8KPa.
It should be noted that the cooling and noise reduction device 100 provided by the present invention can be installed at the exhaust pipe of the air compressor to reduce the temperature and noise of the exhaust gas; the air compressor cooling device can also be applied to a multi-stage compression system to be used as a cooling device between two adjacent stages of air compressors and be arranged between the two adjacent stages of air compressors, so that the energy efficiency of the compression system is improved, the exhaust noise is reduced, and the purposes of energy conservation and environmental protection are achieved.
In conclusion, through the design of the cooling and noise reduction device, a plurality of Helmholtz resonators connected in series are formed between the first air holes of each first air hole group on the air inlet pipe and the cavity, so that the flow noise of the air is effectively reduced; the gas in the cavity enters the silencing cavity through the spiral pipe, so that the gas is subjected to heat exchange with a cooling medium in the cooling cavity fully when passing through the spiral pipe, the temperature of the gas is further reduced better, and the gas with the reduced temperature is discharged to the fuel cell through the gas outlet pipe; the feeding pipe is used for guiding a cooling medium into the cooling cavity, and the discharging pipe is used for guiding the cooling medium out of the cooling cavity, so that the cooling medium in the cooling cavity can be kept at a lower temperature, sufficient heat exchange between gas passing through the threaded pipe and the cooling medium is guaranteed, and the temperature of the gas is effectively reduced; in addition, the cooling and noise reduction device can also avoid overlarge pressure drop of the cooled gas and avoid the excessive energy consumption attenuation of an upstream gas supply device.
Second embodiment of Cooling noise reduction device
Referring to fig. 11, the present embodiment is different from the first embodiment of the cooling and noise reducing device in that in the present embodiment, a first fin 511 assembly is disposed at the inner peripheral wall surface of the cavity 51, a second fin assembly 521 is disposed at a part of the inner peripheral wall surface of the cooling cavity 52, and a third fin assembly 531 is disposed at the inner peripheral wall surface of the sound deadening cavity 53. Through set up the fin in each cavity in the main part, can further increase the flow velocity and the heat transfer area of fluid (like gas, liquid etc.), improve heat transfer coefficient and to gaseous cooling effect.
Third embodiment of Cooling noise reduction device
Referring to fig. 12, the present embodiment is different from the above embodiments in that in the present embodiment, a breather pipe 62 is installed in each first air hole 611 of the intake pipe 61, a first end of the breather pipe 62 is located in the intake pipe 61, and a second end of the breather pipe 62 is located in the cavity 63. Accessible welded fastening between breather pipe 62 and intake pipe 61, the setting of breather pipe 62 can further increase the noise cancelling effect of helmholtz resonator, in addition, still adjusts the low frequency of noise eliminated through adjusting breather pipe 62 length.
Fourth embodiment of a Cooling noise reduction device
Referring to fig. 13, the present embodiment is different from the above embodiments in that the arrangement of the hollow tube is eliminated, and the structure of the intake pipe, the structure of the exhaust pipe, and the arrangement position of the exhaust pipe are modified, specifically:
a second end of the intake pipe 72 extends to the second partition 711 of the main body 71, and a second end wall of the intake pipe 72 is located in the cooling chamber 712. The outlet pipe 73 is coaxially arranged with the inlet pipe 72, a first end of the outlet pipe 73 is positioned outside the main body 71, and a second end of the outlet pipe 73 is butted against a second end wall of the inlet pipe 72. The outlet pipe 73 is provided with a plurality of sets of second air hole groups 731, the plurality of sets of second air hole groups 731 are located in the silencing cavity 713, and the plurality of sets of second air hole groups 731 are distributed along the axial direction of the inlet pipe 72. The second air hole group 731 includes a plurality of second air holes 7311 distributed along the second axial direction of the air outlet pipe 73, the second end of the air outlet pipe 73 has a second opening, the second opening is communicated with a second flow passage in the air outlet pipe 73, the second air holes 7311 are communicated with the sound-deadening chamber 713 and the second flow passage in the air outlet pipe 73, so that the sound-deadening chamber 713 can be communicated with the second opening of the air outlet pipe 73 through the second flow passage and the second air holes 7311.
Through the design, make the cooling noise reduction device can change into the structural style that intake pipe 72 directly advances, the blast pipe directly goes out, and then make the cooling noise reduction device can the more diversified interior spatial position of adaptation, simultaneously, through the structural design to outlet duct 73, make the cooling noise reduction device that this embodiment provided can reach the cooling noise reduction device of each above-mentioned embodiment equal effect that falls.
Fuel cell System embodiments
The fuel cell system comprises an air compressor, a fuel cell and a cooling and noise reducing device, wherein the cooling and noise reducing device is the cooling and noise reducing device described in any one of the first embodiment to the fourth embodiment of the cooling and noise reducing device. The air inlet pipe is in butt joint with the air compressor, and the air outlet pipe is in butt joint with the fuel cell. The fuel cell system provided with the cooling and noise reduction device can better cool and reduce noise of gas discharged by the air compressor, and avoids overlarge pressure drop loss of the gas.
Fuel cell vehicle embodiment
The fuel cell automobile provided with the fuel cell system can better cool and reduce noise of gas discharged by an air compressor, and avoids overlarge pressure drop loss of the gas.
Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, and it should be understood that various changes and modifications may be made by those skilled in the art, and any changes, equivalents, improvements and the like, which fall within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (10)
1. A cooling and noise reducing apparatus, comprising:
the main body is cylindrical, the main body is provided with a cavity, a cooling cavity and a silencing cavity which are sequentially distributed along the axial direction of the main body, a first partition plate is arranged between the cavity and the cooling cavity, and a second partition plate is arranged between the cooling cavity and the silencing cavity;
the air inlet pipe extends along the axial direction, the first end of the air inlet pipe is positioned outside the first end of the main body, the second end of the air inlet pipe penetrates through the cavity, a plurality of groups of first air hole groups positioned in the cavity are arranged on the air inlet pipe, the plurality of groups of first air hole groups are distributed along the axial direction, each first air hole group comprises a plurality of first air holes distributed along the first circumferential direction of the air inlet pipe, the first air holes are communicated with the cavity and the first end of the air inlet pipe, and the second end of the air inlet pipe is closed;
the spiral pipe group is positioned in the cooling cavity, a first end of a spiral pipe of the spiral pipe group is connected with the first partition plate and communicated with the cavity, and a second end of the spiral pipe is connected with the second partition plate and communicated with the silencing cavity;
the air outlet pipe is communicated with the silencing cavity;
the cooling cavity is communicated with the feeding pipe and the discharging pipe.
2. A cooling and noise reducing device according to claim 1, wherein:
the maximum distribution height of the first set of gas holes is between one half and four fifths of the height of the cavity in the axial direction;
the total area of the first air holes is between 0.85 and 1.1 times of the flow area of the air inlet pipe.
3. A cooling and noise reducing device according to claim 2, wherein:
the aperture setting of the first air hole satisfies the following formula:
the number of the first air holes of each group of the first air hole groups is set to satisfy the following formula:
4. The cooling noise reduction apparatus according to claim 1, wherein:
the cooling and noise reducing device comprises a hollow pipe, a first end of the hollow pipe is in butt joint with a second end wall of the air inlet pipe, a second end of the hollow pipe is located in the silencing cavity and is in butt joint with a second end wall of the main body, and the threaded pipe is connected with the outer peripheral wall of the hollow pipe;
the second end of intake pipe runs through the cavity and stretches into in the cooling chamber, the outlet pipe is followed the radial extension of main part.
5. The cooling noise reduction apparatus according to claim 1, wherein:
the second end of the air inlet pipe extends to the second partition plate, the air outlet pipe and the air inlet pipe are coaxially arranged, the first end of the air outlet pipe is positioned outside the main body, and the second end of the air outlet pipe is butted with the second end wall of the air inlet pipe;
the air outlet pipe is provided with a plurality of groups of second air hole groups positioned in the silencing cavity, the plurality of groups of second air hole groups are distributed along the axial direction, each second air hole group comprises a plurality of second air holes distributed along the second circumferential direction of the air outlet pipe, and the second air holes are communicated with the silencing cavity and the second end of the air outlet pipe.
6. A cooling and noise reducing device according to claim 1, wherein:
the number of the spiral pipes is more than two, and the spiral pipes are distributed along the first circumferential direction;
the spiral pipe is a cylindrical spiral pipe, or
The spiral pipe is a conical spiral pipe, the curvature radius of the conical spiral pipe is gradually reduced from the first partition plate to the second partition plate, and the taper of the conical spiral pipe is between 5 and 35 degrees;
the total flow area of the more than two spiral pipes is between 0.8 and 1 time of the flow area of the air inlet pipe.
7. A cooling and noise reduction arrangement according to any of claims 1 to 6, wherein:
every all install the breather pipe in the first gas port, the first end of breather pipe is located in the air inlet pipe, the second end of breather pipe is located in the cavity.
8. A cooling and noise reduction arrangement according to any of claims 1 to 6, wherein:
a sound-absorbing cavity is arranged in the cooling cavity, and a sound-absorbing material is arranged in the sound-absorbing cavity;
the inlet pipe is close to the setting of second baffle, the discharging pipe is close to the setting of first baffle.
9. A fuel cell system comprising an air compressor and a fuel cell, further comprising a cooling and noise reducing device as claimed in any one of claims 1 to 8, wherein the air inlet pipe is connected to the air compressor, and the air outlet pipe is connected to the fuel cell.
10. A fuel cell vehicle, characterized by comprising the fuel cell system according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211193099.2A CN115441004B (en) | 2022-09-28 | 2022-09-28 | Cooling noise reduction device, fuel cell system and fuel cell automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211193099.2A CN115441004B (en) | 2022-09-28 | 2022-09-28 | Cooling noise reduction device, fuel cell system and fuel cell automobile |
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| CN115441004A true CN115441004A (en) | 2022-12-06 |
| CN115441004B CN115441004B (en) | 2024-07-09 |
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| CN202211193099.2A Active CN115441004B (en) | 2022-09-28 | 2022-09-28 | Cooling noise reduction device, fuel cell system and fuel cell automobile |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050284691A1 (en) * | 2004-05-11 | 2005-12-29 | Voss Mark G | Integrated heat exchanger and muffler unit |
| US20070269695A1 (en) * | 2004-04-08 | 2007-11-22 | Toyota Jidosha Kabushiki Kaisha | Fuel Cell System |
| CN213425024U (en) * | 2020-11-04 | 2021-06-11 | 浙江吉利控股集团有限公司 | Fuel cell automobile air intercooler |
-
2022
- 2022-09-28 CN CN202211193099.2A patent/CN115441004B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070269695A1 (en) * | 2004-04-08 | 2007-11-22 | Toyota Jidosha Kabushiki Kaisha | Fuel Cell System |
| US20050284691A1 (en) * | 2004-05-11 | 2005-12-29 | Voss Mark G | Integrated heat exchanger and muffler unit |
| CN213425024U (en) * | 2020-11-04 | 2021-06-11 | 浙江吉利控股集团有限公司 | Fuel cell automobile air intercooler |
Non-Patent Citations (1)
| Title |
|---|
| 申秀敏;左曙光;蔡建江;冯青;: "燃料电池车声振测试及噪声源识别", 声学技术, no. 04, 15 August 2008 (2008-08-15) * |
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| CN115441004B (en) | 2024-07-09 |
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