CN214471786U - Performance testing device for fuel cell membrane humidifier - Google Patents
Performance testing device for fuel cell membrane humidifier Download PDFInfo
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- CN214471786U CN214471786U CN202120444984.8U CN202120444984U CN214471786U CN 214471786 U CN214471786 U CN 214471786U CN 202120444984 U CN202120444984 U CN 202120444984U CN 214471786 U CN214471786 U CN 214471786U
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Abstract
The utility model relates to the technical field of fuel cells, in particular to a performance testing device for a fuel cell membrane humidifier, which comprises an air pretreatment system, a flow control system, an air preheating system, a membrane humidifier, a matched sensor system, a backpressure control system, a tail exhaust cooling system, a water-vapor separation system, a backflow flow distribution system, a backflow gas pressure control system, a backflow gas temperature and humidity control system and an electric control system; the utility model can accurately simulate the air filtering and air compressor supercharging and heating effects at the front end of the dry side of the membrane humidifier, and has high precision and quick response; the membrane humidifier is optimized for the problem that the humidifying energy consumption of high-temperature and high-humidity gas required by the membrane humidifier at a high flow rate on the wet side is large, so that the energy consumption is saved; the cooling water system is optimized for the problem of large cooling water amount required by cooling and condensing high-temperature and high-humidity gas discharged at the tail end under high flow, so that the energy consumption is saved, and the requirements on equipment and laboratories for cooling water are greatly reduced.
Description
Technical Field
The utility model relates to a fuel cell technical field, concretely relates to fuel cell membrane humidifier capability test device.
Background
As a new green power source, a fuel cell engine is becoming one of the important research and development points of vehicle-mounted engines due to its excellent characteristics such as high efficiency and low emission. The fuel cell engine is based on the output of a load, and has good controllability for the whole vehicle; meanwhile, the energy output of the fuel cell engine is electric energy, and the transmission and speed regulation structure of the traditional automobile is simplified. Although fuel cell engines have many advantages over internal combustion engines, fuel cell engines are the mainstream of automotive engines to replace internal combustion engines, and many problems need to be solved. The testing of the membrane humidifier, which is a core component of the fuel cell engine, has a large problem, and at present, no better scheme is available for verifying the humidifying capacity of the inlet stack gas of the membrane humidifier under different temperature and humidity flows of the wet gas, and meanwhile, the flow resistance of the wet side of the dry side of the membrane humidifier also influences the performance of the fuel cell engine.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the performance testing device for the membrane humidifier of the fuel cell overcomes the defects in the prior art.
In order to solve the technical problem, the utility model discloses a technical scheme be: a fuel cell membrane humidifier performance test device comprises an electric control system for controlling the device, and an air pretreatment system, a flow control system, an air preheating system, a tail exhaust cooling system and a water-vapor separation system which are sequentially connected; a dry side air inlet pipeline of the membrane humidifier is communicated with an air pre-warming system, and a dry side air outlet pipeline is communicated with a tail exhaust cooling system;
a wet side air inlet pipeline of the membrane humidifier is communicated with the tail gas exhaust cooling system again through a return gas temperature and humidity control system, a return gas pressure control system and a return flow distribution system in sequence;
and a wet side air outlet pipeline of the membrane humidifier is communicated with the reflux flow distribution system through a backpressure control system.
The beneficial effects of the utility model reside in that: the method and the device can accurately control parameters such as flow, pressure, temperature and humidity required by the wet side of the membrane humidifier, and have high precision and fast response; the air filtering and air compressor supercharging and heating effects at the front end of the dry side of the membrane humidifier can be accurately simulated, and the precision is high and the response is fast; the membrane humidifier is optimized for the problem that the humidifying energy consumption of high-temperature and high-humidity gas required by the membrane humidifier at a high flow rate on the wet side is large, so that the energy consumption is saved; the cooling water system is optimized for the problem of large cooling water amount required by cooling and condensing high-temperature and high-humidity gas discharged at the tail end under high flow, so that the energy consumption is saved, and the requirements on equipment and laboratories for cooling water are greatly reduced.
Drawings
Fig. 1 is a block diagram of a device for testing the performance of a membrane humidifier of a fuel cell according to an embodiment of the present method;
description of reference numerals: 1. an air pre-treatment system; 2. a flow control system; 3. an air pre-warming system; 4. A membrane humidifier system; 5. a backpressure control system; 6. a tail gas cooling system; 7. a water-vapor separation system; 8. a reflux flow distribution system; 9. a return gas pressure control system; 10. a return gas temperature and humidity control system; 11. An electronic control system; 12. a dry side air intake conduit; 13. a dry side air outlet pipeline; 14. a wet side air intake conduit; 15. and a wet side air outlet pipeline.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, a performance testing device for a membrane humidifier of a fuel cell includes an electric control system 11 for controlling the device, and an air pretreatment system 1, a flow control system 2, an air preheating system 3, a tail gas cooling system 6, and a water-vapor separation system 7, which are connected in sequence; a dry side air inlet pipeline 12 of the membrane humidifier 4 is communicated with the air preheating system 3, and a dry side air outlet pipeline 13 is communicated with the tail gas exhaust cooling system 6;
the wet side air inlet pipeline 14 of the membrane humidifier 4 is communicated with the tail gas exhaust cooling system 6 again through the return gas temperature and humidity control system 10, the return gas pressure control system 9 and the return flow distribution system 8 in sequence;
the wet side air outlet line 15 of the membrane humidifier 4 is in communication with the return flow distribution system 8 via the backpressure control system 5.
Further, the air pretreatment system 1 comprises an air delivery pipe, and an angle seat valve, an electric pressure reducing valve, a filter and a one-way valve which are arranged on the air delivery pipe.
Further, the flow control system 2 includes an air delivery pipe, and a proportional valve and a flow meter or a mass flow controller provided on the air delivery pipe.
Further, the membrane humidifier and the matched sensor system comprise a measured membrane humidifier, a dry side air inlet pipeline 12, a flow meter arranged on the dry side air inlet pipeline 12, a temperature sensor, a humidity sensor, a pressure sensor, a dry side air outlet pipeline 13, a temperature sensor arranged on the dry side air outlet pipeline 13, a humidity sensor, a pressure sensor, a wet side air inlet pipeline 14, a flow meter arranged on the wet side air inlet pipeline 14, a temperature sensor, a humidity sensor, a pressure sensor, a wet side air outlet pipeline 15, a temperature sensor arranged on the wet side air outlet pipeline 15, a humidity sensor and a pressure sensor.
Further, the backpressure control system 5 comprises an air delivery pipe, a proportional valve arranged on the air delivery pipe, and front and rear end pressure sensors of the proportional valve.
Further, tail row cooling system 6 includes air delivery pipe and the plate heat exchanger of setting on air delivery pipe, the ball valve and the temperature sensor of plate heat exchanger cold side, the temperature sensor of plate heat exchanger hot side export.
Further, the water-vapor separation system 7 comprises an air conveying pipe, and a water-vapor separation tank, a high liquid level sensor, a low liquid level sensor, a drain ball valve and an automatic drain electromagnetic valve which are arranged on the air conveying pipe.
Further, the return flow distribution system 8 includes an air delivery pipe and an electric three-way valve disposed on the air delivery pipe.
Further, the return gas pressure control system 9 includes an air delivery pipe and an electric pressure regulating valve provided on the air delivery pipe.
Further, the backflow gas temperature and humidity control system 10 comprises an air delivery pipe, a spray type humidification tank arranged on the air delivery pipe, a circulating kinetic energy device and a water temperature control device matched with the spray type humidification tank, a gas heater and sensors.
Further, the electronic control system 1111 includes a controller, a solid state relay, and a contactor.
From the above description, the control method and the control device can accurately control parameters such as flow, pressure, temperature and humidity required by the wet side of the membrane humidifier, and have high accuracy and quick response; the air filtering and air compressor supercharging and heating effects at the front end of the dry side of the membrane humidifier can be accurately simulated, and the precision is high and the response is fast; the membrane humidifier is optimized for the problem that the humidifying energy consumption of high-temperature and high-humidity gas required by the membrane humidifier at a high flow rate on the wet side is large, so that the energy consumption is saved; the cooling water system is optimized for the problem of large cooling water amount required by cooling and condensing high-temperature and high-humidity gas discharged at the tail end under high flow, so that the energy consumption is saved, and the requirements on equipment and laboratories for cooling water are greatly reduced.
The working process of the application is as follows: the method comprises the steps that dry air is subjected to pretreatment such as filtration and pressure reduction by an air pretreatment system 1, the flow of the dry air is controlled by a flow control system 2, the dry air is heated by an air preheating system 3, the temperature of the air passing through an air compressor and a intercooler in actual use is simulated, a measured membrane humidifier is tested in a membrane humidifier and a matched sensor system, the inlet and outlet parameters of the dry air and moisture are detected simultaneously, the pressure of the dry air is controlled by a backpressure control system 5 after passing through the membrane humidifier and the matched sensor system, the temperature is reduced and condensed by a tail discharge cooling system 6, tail discharge water is collected by a water-vapor separation system 7, the tail discharge water is automatically discharged by control of an electromagnetic valve and a liquid level sensor, the flow of the gas which needs to flow back to the wet side of the membrane humidifier is distributed by a backflow flow distribution system 8, and the pressure is controlled by a backflow gas pressure control system 9, the flow rate is controlled by a return gas temperature and humidity control system 10, and an electric control system 11 is used for providing electric energy for the operation of the device and performing master control on all the systems.
Example one
The utility model provides a fuel cell membrane humidifier capability test device, sets up on braced frame, the device includes that air pretreatment systems 1, flow control system 2, air heat system 3, membrane humidifier and supporting sensor system, backpressure control system 5, tail row cooling system 6, steam separation system 7, backward flow distribution system 8, backward flow gas pressure control system 9, backward flow gas temperature and humidity control system 10 and electrical system 11 in advance.
The air at the front end of the air pretreatment system 1 is provided by a laboratory air compressor and comprises an air delivery pipe, and an angle seat valve, an electric pressure reducing valve and a filter which are arranged on the air delivery pipe. Mainly used provides the compressed air to mass flow controller of suitable pressure, electric pressure reducing valve passes through PID control can automatic control front end pressure under any flow, because the difference in pressure of mass flow controller front and back end can not be too high, under little flow, front end pressure passes through electric pressure reducing valve and sets up lowly, the relief pressure valve can provide corresponding flow, but under large-traffic, relief pressure valve nature pressure drop and mass flow controller nature pressure drop are great, the relief pressure valve can't provide great flow under little pressure simultaneously, front end pressure sets up the height through electric pressure reducing valve. The filter may filter impurities in the air, simulating an air filter on an engine.
Further, the flow control system 2 comprises a mass flow controller, and the mass flow controller can accurately control the final stacking flow.
Further, the air preheating system 3 comprises a high-power heater and a plate heat exchanger, the output power of the gas heater can be accurately controlled through an electric power regulator, so that the gas can reach the desired preheating temperature, and if small overshoot exists, the temperature can be accurately finely adjusted through the plate heat exchanger, so that the precision reaches +/-1 ℃.
Furthermore, the membrane humidifier and a matched sensor system are divided into a dry side inlet and outlet sensor and a wet side inlet and outlet sensor, each interface comprises a temperature sensor, a pressure sensor and a humidity sensor, and the state of dry side gas passing through the membrane humidifier and the humidity and temperature loss of wet side gas can be accurately detected, so that the performance index of the membrane humidifier can be accurately measured.
Further, the backpressure control system 5 comprises a proportional valve and a backpressure valve, the proportional valve used under the condition of small flow accurately controls pressure, the backpressure valve used under the condition of large flow accurately controls pressure, and the pressure control precision of each flow section is guaranteed.
Further, tail row cooling system 6 includes plate heat exchanger and the ball valve that links to each other, and the tail row gas that has carried out partial cooling through the membrane humidifier cools down in the heat exchanger, makes the temperature drop to being close to the room temperature, and when tail gas emission was to the pipeline in the laboratory like this, a large amount of comdenstion water can not appear.
Further, tail water drainage steam piece-rate system 7 includes steam knockout drum, solenoid valve, ball valve and level sensor, and when the incessant accumulation of water, accessible high level sensor detects, carries out automatic drainage.
Further, the backflow flow distribution system 8 comprises an electric three-way valve and a flow meter, an inlet of the electric three-way valve is connected with an outlet of the backpressure control system 5, an outlet 1 of the electric three-way valve is connected to the tail exhaust cooling system 6 and is exhausted after cooling, an outlet 2 of the electric three-way valve is connected to the backflow gas pressure distribution system, the flow meter is used for detecting a backflow flow value, a user can set a metering ratio, software calculates actual shunt flow, the current flow is detected through the flow meter to adjust the opening degree of the electric three-way valve, and actual fuel cell stack outlet flow is obtained.
Further, the return gas pressure control system 9 includes an electrically-operated pressure regulating valve that simulates the actual fuel cell stack outlet pressure by user setting.
Further, the return air temperature and humidity control system 10 includes a humidification tank humidification system and a heater.
As preferred technical scheme, the humidification jar be equipped with level sensor, moisturizing solenoid valve and drainage solenoid valve, after long-time continuous operation, gaseous big water of taking away can carry out the moisturizing to the humidification jar through the level gauge detection, the gas through the humidification jar is 100% RH humidity. The humidifying path temperature control system consists of a plate heat exchanger, a heater and a related sensor, the heating power of the heater is controlled through a PID algorithm when the temperature rises or is kept stable, and the temperature compensation is controlled through the plate heat exchanger and a proportional valve, so that the accurate water temperature control is realized.
As a preferable technical scheme, each pipeline is also provided with corresponding conventional pipe fittings such as a filter, a one-way valve, a pressure regulating valve, a flow sensor, a pressure sensor, a temperature sensor, an ion concentration sensor and the like.
In the reflux flow distribution system 8, the oxygen content in the default air is 21%, the user sets the air metering ratio to 2, sets the flow 10000SLPM, and the theoretical fuel cell stack outlet flow is:
10000-10000*21％/2＝8950SLPM
at this time, the electric three-way valve automatically adjusts the opening degree to make the return flow rate 8950 SLPM.
And similarly, the reflux flow rate under different metering ratios and different flow rates set by a user can be calculated, and the set value of the metering ratio is not less than 1.
Example two
The same parts of the device for testing the performance of the membrane humidifier of the fuel cell are not described in detail as in the first embodiment, wherein the return gas temperature and humidity control system 10 uses gas which is humidified by the membrane humidifier, and the energy consumption is greatly reduced.
In the humidification tank system, the system is considered as an adiabatic system, and the input heat is dry air Qair, in, supplemented water Q1, in, and electric heating power wheats, and the efficiency is considered. The output heat is Q out, saturated humid air is calculated according to a heat balance formula to evaluate the working condition:
Qin＝Qout
Qin＝Qg，in+Ql，in+ηWheat
Qout＝Qg，out+Ql，out
and (3) while: heat exchange capacity (kW); eta: heater efficiency; ω g: gas mass flow (kg/s); ω 1: the mass flow (kg/s) of liquid water carried away by gas humidification; cP: specific heat at constant gas pressure (kJ/kg. DEG C); Δ Tg: gas temperature rise (. degree. C.); hv: vapor enthalpy (kJ/kg) at dew point temperature; h 1: liquid water enthalpy value (kJ/kg) at normal temperature
The concept of moisture content is incorporated herein. The moisture content is the ratio of the mass of water vapor in the air to the mass of the absolutely dry air, namely:
ωl＝ωgH
if the gas humidified by the membrane humidifier is not used, the calculation result shows that the required heat quantity provided by the return gas temperature and humidity control system 10 is 174.4kW when the stack pressure is 100kPa, the air humidification temperature of 20 ℃, 8000SLPM is increased to 90 ℃, and the 100% RH wet gas is obtained.
Further, using the gas humidified by the membrane humidifier, 10000SLPM wet air at 90 ℃ on the wet side in the membrane humidifier system can be used to raise the dry side gas at 20 ℃ and 10000SLPM dry gas to 40 ℃ and 60% RH by the selective membrane humidifier.
Meanwhile, the calculation result shows that when the temperature of 40 ℃, 8000SLPM and 60 percent RH air is humidified and heated to 90 ℃, 100 percent RH wet gas is heated, and the required heat provided by a humidifying circuit temperature control system is 142.24kW when the pile-entering pressure is 100 kPa.
It can be seen that the return air temperature and humidity control system 10 saves 32.16kW of energy using air humidified by the membrane humidifier, and similarly saves 32.16kW of energy in the tail exhaust cooling system 6 at the tail exhaust portion.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (10)
1. A fuel cell membrane humidifier performance test device is characterized by comprising an electric control system for controlling the device, and an air pretreatment system, a flow control system, an air preheating system, a tail exhaust cooling system and a water-vapor separation system which are sequentially connected; a dry side air inlet pipeline of the membrane humidifier is communicated with an air pre-warming system, and a dry side air outlet pipeline is communicated with a tail exhaust cooling system;
a wet side air inlet pipeline of the membrane humidifier is communicated with the tail gas exhaust cooling system again through a return gas temperature and humidity control system, a return gas pressure control system and a return flow distribution system in sequence;
and a wet side air outlet pipeline of the membrane humidifier is communicated with the reflux flow distribution system through a backpressure control system.
2. The fuel cell membrane humidifier performance testing apparatus according to claim 1, wherein the air pre-processing system includes an air delivery pipe, and a corner seat valve, an electrically operated pressure reducing valve, a filter, and a check valve provided on the air delivery pipe.
3. The fuel cell membrane humidifier performance testing apparatus according to claim 1, wherein the flow control system includes an air delivery pipe and a proportional valve and a flow meter or uses a mass flow controller provided on the air delivery pipe.
4. The fuel cell membrane humidifier performance testing device of claim 1, wherein the membrane humidifier and the associated sensor system comprise a tested membrane humidifier, a dry side air inlet pipeline, a flow meter arranged on the dry side air inlet pipeline, a temperature sensor, a humidity sensor, a pressure sensor, a dry side air outlet pipeline, a temperature sensor, a humidity sensor, a pressure sensor, a wet side air inlet pipeline, a flow meter arranged on the wet side air inlet pipeline, a temperature sensor, a humidity sensor, a pressure sensor, a wet side air outlet pipeline, a temperature sensor, a humidity sensor and a pressure sensor arranged on the wet side air outlet pipeline.
5. The fuel cell membrane humidifier performance testing apparatus according to claim 1, wherein the back pressure control system includes an air delivery pipe, and a proportional valve and proportional valve front and rear end pressure sensors provided on the air delivery pipe.
6. The fuel cell membrane humidifier performance testing device according to claim 1, wherein the tail gas cooling system comprises an air delivery pipe, a plate heat exchanger arranged on the air delivery pipe, a ball valve and a temperature sensor on a cold side of the plate heat exchanger, and a temperature sensor on an outlet of a hot side of the plate heat exchanger.
7. The fuel cell membrane humidifier performance testing apparatus according to claim 1, wherein the water vapor separation system comprises an air delivery pipe, and a water vapor separation tank, a high liquid level sensor, a low liquid level sensor, a drain ball valve and an automatic drain solenoid valve which are arranged on the air delivery pipe.
8. The fuel cell membrane humidifier performance testing apparatus according to claim 1, wherein the return flow distribution system includes an air delivery pipe and an electrically operated three-way valve provided on the air delivery pipe.
9. The fuel cell membrane humidifier performance testing apparatus according to claim 1, wherein the return gas pressure control system includes an air delivery pipe and an electrically operated pressure regulating valve provided on the air delivery pipe.
10. The fuel cell membrane humidifier performance testing apparatus according to claim 1, wherein the return gas temperature and humidity control system includes an air delivery pipe, a spray humidification tank disposed on the air delivery pipe, a circulating kinetic energy device and a water temperature control device, a gas heater, and sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120444984.8U CN214471786U (en) | 2021-03-02 | 2021-03-02 | Performance testing device for fuel cell membrane humidifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120444984.8U CN214471786U (en) | 2021-03-02 | 2021-03-02 | Performance testing device for fuel cell membrane humidifier |
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| CN214471786U true CN214471786U (en) | 2021-10-22 |
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| CN202120444984.8U Active CN214471786U (en) | 2021-03-02 | 2021-03-02 | Performance testing device for fuel cell membrane humidifier |
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- 2021-03-02 CN CN202120444984.8U patent/CN214471786U/en active Active
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