A multi-condition test platform for a fuel cell gas supply system with both dry and wet operation

Abstract

This invention provides a multi-condition test platform for a fuel cell gas supply system operating in both dry and wet conditions. The platform includes a replaceable and adjustable base, a staged cooling and localized temperature / flow control system, a variable humidity steam supply system, and an online data acquisition system. The replaceable and adjustable base is equipped with a target model air compressor according to the test objectives and requirements. The staged cooling and localized temperature / flow control system regulates the actuators in the coolant and hot air pipelines of the air compressor. The variable humidity steam supply system humidifies the working fluid before, between, and before the vortex stage of the air compressor. The online data acquisition system is connected to the staged cooling and localized temperature / flow control system and the variable humidity steam supply system, receiving real-time data on the working fluid temperature, pressure, relative humidity, and mass flow rate at measurement points during the experiment. This invention significantly simplifies the complexity of the test system piping, enabling the development of upper and lower computer control programs and optimization algorithms, and ensuring online control of humidity during wet compression and wet expansion.

Description

Technical Field

[0001] This invention relates to the field of test platform technology, and more specifically, to a multi-condition test platform for a fuel cell gas supply system with both dry and wet circuits. Background Technology

[0002] Given the current global shortage of traditional energy sources and severe environmental pollution, fuel cell engines, with their high efficiency, energy saving, and zero emissions, have ignited a new direction for the future development of the automotive industry. As a core component of the engine system, the fuel cell supply system directly affects the engine's operational stability, power output, and efficiency improvement. Therefore, designing a multi-condition test platform for the fuel cell gas supply system, operating under both dry and wet conditions, is extremely important.

[0003] The existing fuel cell gas supply system test platform has a relatively complex test system pipeline, which is very inconvenient to disassemble, stack, reassemble and repair. In addition, a test platform can only perform a single test, and the wet compression and wet expansion humidity of the system cannot be controlled online. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a multi-condition test platform for a fuel cell gas supply system with both dry and wet circuits. This platform significantly simplifies the complexity of the test system piping, ensures online control of wet compression and wet expansion humidity, and solves the cumbersome operational problems of disassembling, stacking, and reassembling different test bench components in existing technologies.

[0005] To achieve the above technical objectives, the present invention provides a multi-condition test platform for a fuel cell gas supply system with both dry and wet circuits, including a replaceable and adjustable base, a staged cooling and local temperature / flow control system, a variable humidity steam supply system, and an online data acquisition system.

[0006] The replaceable and adjustable base platform can accommodate the target model of air compressor according to the test objectives and requirements;

[0007] The graded cooling and localized temperature / flow control system adjusts the actuators in the coolant pipeline and hot air pipeline of the air compressor according to the type of air compressor and test requirements.

[0008] The variable humidification steam supply system humidifies the working fluid before, between, and before the vortex of the air compressor according to the test requirements.

[0009] The online data acquisition system is connected to the graded cooling and localized temperature / flow control system and the variable humidity steam supply system, and receives the working fluid temperature, pressure, relative humidity and mass flow rate at the measurement points during the experiment in real time.

[0010] Preferably, the graded cooling and localized temperature / flow control system includes an intake pipe, a 1s exhaust pipe, an intercooler, an intercooler main exhaust pipe, an intercooler auxiliary exhaust pipe, a coolant supply circuit, dry and wet intake and exhaust main pipes, dry and wet main exhaust pipes, dry and wet auxiliary exhaust pipes, a 2s / turbine intake and exhaust pipe, and a turbine exhaust pipe.

[0011] Preferably, the intercooler includes a hot end inlet, a hot end outlet, a cold end inlet, and a cold end outlet. The hot end inlet is connected to the 1s exhaust pipe, and the hot end outlet is connected to the main exhaust pipe of the intercooler. The main exhaust pipe of the intercooler and the auxiliary exhaust pipe of the intercooler are connected by a T-junction. A shut-off valve is provided downstream of the auxiliary exhaust pipe of the intercooler. When the test is a dry and wet compression characteristic test of an interstage intercooled air compressor, the shut-off valve is in the open state, and in other cases, the shut-off valve is closed.

[0012] Preferably, the coolant supply circuit includes a cooling water tank, a water supply pump, and a pneumatic regulating valve.

[0013] Preferably, the main exhaust pipe of the intercooler is connected to the dry and wet inlet and outlet main pipes and the dry and wet main exhaust pipes via a T-junction, and a filter is installed on the intercooler exhaust pipe to separate the gas and liquid working fluid after wet compression by the integrated vortex-assisted electric drive single-stage air compressor.

[0014] Preferably, pneumatic flow regulating valve A and pneumatic flow regulating valve B are installed on the dry and wet main exhaust pipe and the dry and wet auxiliary exhaust pipe, respectively.

[0015] Preferably, the end of the intercooler auxiliary exhaust pipe, the 2s / turbine inlet and outlet pipe and the turbine exhaust pipe are connected by a T-junction. During the interstage cooling two-stage electric air compressor characteristic test and the integrated turbine-assisted electric single-stage air compressor characteristic test, the 2s / turbine inlet and outlet pipe are respectively the inlet pipe of the second stage compressor and the exhaust pipe of the turbine.

[0016] Preferably, the variable humidity steam supply system includes a steam generator, a pressure reducing valve, a pressure stabilizing tank, a steam regulating valve, a wet-dry mixer A, a wet-dry mixer B, steam pipeline 1, and steam pipeline 2. The steam generator's supply pressure and temperature are adjusted according to test requirements. The pressure reducing valve can reduce the steam pressure entering the pressure stabilizing tank. The opening of the steam regulating valve is adjusted to control the humidification amount. Steam pipeline 1 and steam pipeline 2 are respectively connected to wet-dry mixer A and wet-dry mixer B. Wet-dry mixer A and wet-dry mixer B are respectively placed in the air inlet pipe and the main exhaust pipe of the intercooler to mix the wet and dry working fluids so that the air reaches the target humidity requirement.

[0017] Preferably, the online data acquisition system is used to acquire sensor signals at target points in the test pipeline. The measured signals are connected to the host computer via bus communication. By comparing the measured value with the target value, the control platform inputs specific instructions to control each actuator and component in the pipeline.

[0018] Preferably, the online data acquisition system includes hardware and software components. The hardware components include a host computer, a display, a memory, an oscilloscope, a power supply, a programmer, input / output units (I / O), data acquisition devices, and a controller. The software components include LabVIEW graphical programming software for the host computer, software for the slave computer and PLC, and a communication protocol.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention discloses a multi-condition test platform for a fuel cell gas supply system with both dry and wet operating paths. Depending on the test requirements, it allows for orthogonal selection of dry operation, wet operation, single-stage air compressor, two-stage air compressor, and eddy current integrated air compressor characteristic tests. Based on the different test types, the gas path piping of the test bench can be controlled as needed for opening and closing. The gas path includes both dry and wet operating paths, greatly simplifying the complexity of the test system piping and achieving a highly efficient "one-machine-for-multiple-uses" test system within a limited space. The test system of this invention also includes an online data acquisition system, enabling the development of upper and lower computer control programs and optimization algorithms, especially ensuring online control of wet compression and wet expansion humidity. The control platform, combined with signal acquisition modules and control units, collects and monitors the test system's operating status in real time. The test bench of this invention has the advantages of easy equipment replacement and diverse testing functions, solving the complex operational problems of disassembling, stacking, and reassembling different test bench components in existing technologies. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the dry and wet simultaneous multi-condition test platform in this invention;

[0023] Figure 2 This is a schematic diagram of the online data acquisition system described in this invention;

[0024] Figure 3 This is a schematic diagram of the dry working fluid humidification control strategy of the present invention;

[0025] Figure 4 This is a schematic diagram illustrating the application of the dry and wet simultaneous multi-condition test platform of this invention to multiple tests. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] The dry and wet co-current multi-condition test platform based on a fuel cell gas supply system described in this invention includes a replaceable and adjustable base, a staged cooling and local co-current temperature / flow control system, a variable humidity steam supply system, and an online data acquisition system. The replaceable and adjustable base can be selected from different target models of actual machines according to the test objectives and requirements. The machine types include single-stage electric-driven air compressors, two-stage electric-driven air compressors, and integrated turbine-assisted electric-driven single-stage air compressors. The staged cooling and local co-current temperature / flow control system, based on the type of actual machine installed on the replaceable and adjustable base and the test requirements, uses host computer software to regulate the actuators in the coolant pipeline and hot air pipeline to ensure that the working fluid in the downstream pipeline of the single-stage compressor, the interstage working fluid in the two-stage compressor, and the upstream working fluid in the turbine inlet meet the flow and temperature requirements. The variable humidity steam supply system humidifies the working fluid in the inlet, interstage, and turbine inlet of the air compressor according to the test requirements. The online data acquisition system is connected to the staged cooling and local co-current temperature / flow control system and the variable humidity steam supply system, receiving real-time data on the working fluid temperature, pressure, relative humidity, and mass flow rate at measurement points during the experiment.

[0028] Furthermore, a high-strength, detachable metal protective shell is installed around the base to ensure the safe operation of the air compressor and turbine, and the base plate is tightly fixed to the actual machine. The base plate is used in conjunction with the liftable platform to ensure that the air compressor, turbine inlet and outlet pipes and other pipelines are at the same height.

[0029] Furthermore, the staged cooling and localized temperature / flow control system includes an intake pipe, a 1s exhaust pipe, an intercooler, an intercooler main exhaust pipe, an intercooler auxiliary exhaust pipe, a coolant supply circuit, dry and wet intake and exhaust main pipes, dry and wet main exhaust pipes, dry and wet auxiliary exhaust pipes, a 2s / turbine intake and exhaust pipe, and a turbine exhaust pipe. The intake pipe, 1s exhaust pipe, and 2s / turbine intake and exhaust pipe are connected to the inlet and outlet of the first-stage air compressor of the target model via flexible connections, ensuring convenient replacement and wide adaptability of the machine under various testing requirements.

[0030] Furthermore, the actual heat exchange power of the intercooler is divided into two levels: the interstage cooling limit condition of the air compressor and the exhaust vortex cooling limit condition of the single-stage compressor. The intercooler needs to meet the maximum heat exchange requirements under different test types. Based on the actual heat exchange requirements during the test, the opening of the liquid circuit valve in the coolant supply circuit is adjusted to obtain the target coolant supply flow rate.

[0031] Furthermore, the intercooler includes a hot end inlet, a hot end outlet, a cold end inlet, and a cold end outlet. The hot end inlet is connected to the 1s exhaust pipe, and the hot end outlet is connected to the main exhaust pipe of the intercooler. The main exhaust pipe of the intercooler and the auxiliary exhaust pipe of the intercooler are connected by a T-junction. A shut-off valve is provided downstream of the auxiliary exhaust pipe of the intercooler. When the test is a dry and wet compression characteristic test of an interstage intercooled air compressor, the shut-off valve is in the open state, and in other cases, the shut-off valve is closed.

[0032] Furthermore, the coolant supply circuit includes a cooling water tank, a water pump, and a pneumatic regulating valve. The water tank has a volume of 24L, and the water pump flow rate ranges from 0-45L / min, thus ensuring the heat dissipation requirements of the motor and controller. The flow rate is adjusted by changing the opening of the pneumatic valve.

[0033] Furthermore, the main exhaust pipe of the intercooler is connected to the dry and wet inlet and outlet main pipes and the dry and wet main exhaust pipes via a T-junction. A filter is installed on the intercooler exhaust pipe to separate the gas and liquid working fluid after wet compression by the integrated vortex-assisted electric drive single-stage air compressor.

[0034] Furthermore, the dry and wet inlet and outlet main pipes are respectively the downstream exhaust pipe of the second-stage compressor and the turbine inlet pipe during the interstage cooling two-stage electric drive air compressor characteristic test and the integrated turbine-assisted electric drive single-stage air compressor characteristic test.

[0035] Furthermore, the dry and wet main exhaust pipe and the dry and wet auxiliary exhaust pipe are respectively the exhaust pipes for the dry and wet compression characteristic test of the air compressor and the wet expansion of the vortex-assisted electric drive single-stage air compressor. The dry and wet main exhaust pipe and the dry and wet auxiliary exhaust pipe are respectively equipped with pneumatic flow regulating valve A and pneumatic flow regulating valve B. The flow regulation range of pneumatic valve A is 0-0.15kg / s, the flow regulation range of pneumatic flow regulating valve B is 0-0.1kg / s, and the pressure rating is 0.4Mpa.

[0036] Furthermore, the end of the intercooler auxiliary exhaust pipe, the 2s / turbine inlet and outlet pipe and the turbine exhaust pipe are connected by a T-junction. During the interstage cooling two-stage electric drive air compressor characteristic test and the integrated turbine-assisted electric drive single-stage air compressor characteristic test, the 2s / turbine inlet and outlet pipe are respectively the inlet pipe of the second stage compressor and the exhaust pipe of the turbine.

[0037] Furthermore, the variable humidification steam supply system includes a steam generator, a pressure reducing valve, a pressure stabilizing tank, a steam regulating valve, a wet-dry mixer A, a wet-dry mixer B, steam line 1, and steam line 2. The steam generator's supply pressure and temperature are adjusted according to test requirements. The pressure reducing valve lowers the steam pressure entering the pressure stabilizing tank, and the opening of the steam regulating valve controls the humidification rate. Steam lines 1 and 2 are respectively connected to wet-dry mixers A and B, which are located in the inlet pipe and the main exhaust pipe of the intercooler, respectively, to mix the wet and dry working fluids to achieve the target humidity requirement.

[0038] Furthermore, the online data acquisition system is used to collect sensor signals at target points in the test pipeline. The measured signals are connected to the host computer via bus communication. By comparing the measured value with the target value, the control platform inputs specific instructions to control each actuator and component in the pipeline.

[0039] Furthermore, the online data acquisition system comprises hardware and software components. The hardware includes a host computer, monitor, memory, oscilloscope, power supply, programmer, input / output units (I / O), data acquisition devices, and a controller. The software includes LabVIEW graphical programming software for the host computer, software for the slave computer and PLC, and communication protocols. The combined use of hardware and software enables the acquisition and measurement of output signals from multiple experimental systems.

[0040] Furthermore, the sensors in the online data acquisition system mainly include temperature sensors, pressure sensors, and humidity sensors at the inlet and outlet of the 1s compressor and the inlet and outlet of the turbine. It also includes intercooler inlet and outlet temperature sensors, motor winding front and rear end temperature sensors, motor rotor temperature sensor, motor cooling channel inlet pressure sensor, motor cooling channel outlet pressure sensor, speed sensor, and cooling water flow meter. The measurement thresholds for the temperature, pressure, and humidity sensors are greater than 170℃, 3.5 bar, and 90% RH, respectively.

[0041] Furthermore, the steam generator is equipped with a display to facilitate the delivery of steam temperature and pressure signals, and no sensors of any kind are installed on the steam generator outlet pipeline.

[0042] Furthermore, the 1s compressor inlet is connected to a dual-torsion flow meter, which can measure the intake flow rate at different operating points. The compressor intake flow rate is regulated by adjusting the valve openings on the dry and wet main exhaust pipes and the dry and wet auxiliary exhaust pipes based on the difference between the target value and the measured value. The intercooler inlet temperature sensor converts the temperature signal into a voltage signal and transmits it to the host unit. The host software automatically controls the pneumatic valve opening based on the intercooler outlet temperature requirement, thereby increasing or decreasing the working fluid flow rate in the cooling circuit. The humidity signals from the 1s compressor and turbine inlet are transmitted to the host unit via a communication bus. Based on the signal difference between the converted humidity measurement signal and the target humidity command, the openings of steam regulating valves 1 and 2 are controlled to change the steam supply flow rate.

[0043] Furthermore, the actual operation of the dry and wet co-operation multi-condition test platform can realize dry and wet compression performance tests of interstage cooling single / two-stage air compressors, wet compression and wet expansion performance tests of vortex-assisted electric drive compressors, start-up and shutdown tests of single / two-stage air compressors, start-up and shutdown tests of vortex-assisted electric drive air compressors, and fatigue characteristic tests of staged cooling impellers, while also taking into account the cooling water pressure drop test of single / two-stage air compressor drive motors.

[0044] This invention discloses a multi-condition test platform for a fuel cell gas supply system with both dry and wet operating paths. Depending on the test requirements, it allows for orthogonal selection of dry operation, wet operation, single-stage air compressor, two-stage air compressor, and eddy current integrated air compressor characteristic tests. Based on the different test types, the gas path piping of the test bench can be controlled as needed for opening and closing. The gas path includes both dry and wet operating paths, greatly simplifying the complexity of the test system piping and achieving a highly efficient "one-machine-for-multiple-uses" test system within a limited space. The test system of this invention also includes an online data acquisition system, enabling the development of upper and lower computer control programs and optimization algorithms, especially ensuring online control of wet compression and wet expansion humidity. The control platform, combined with signal acquisition modules and control units, collects and monitors the test system's operating status in real time. The test bench of this invention has the advantages of easy equipment replacement and diverse testing functions, solving the complex operational problems of disassembling, stacking, and reassembling different test bench components in existing technologies.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. All should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A fuel cell gas supply system dry-wet common path multi-condition test platform, comprising a replaceable and adjustable base station, a hierarchical cooling and local common path temperature / flow control system, a variable humidity steam supply system, an online data acquisition system, characterized in that, The replaceable and adjustable base platform can accommodate the target model of air compressor according to the test objectives and requirements; The graded cooling and localized temperature / flow control system adjusts the actuators in the coolant pipeline and hot air pipeline of the air compressor according to the type of air compressor and test requirements. The variable humidification steam supply system humidifies the working fluid before, between, and before the vortex of the air compressor according to the test requirements. The online data acquisition system is connected to the graded cooling and local co-current temperature / flow control system and the variable humidity steam supply system, and receives the working fluid temperature, pressure, relative humidity and mass flow rate at the measurement points during the experiment in real time; The graded cooling and localized temperature / flow control system includes an intake pipe, a 1s exhaust pipe, an intercooler, an intercooler main exhaust pipe, an intercooler auxiliary exhaust pipe, a coolant supply circuit, dry and wet intake and exhaust main pipes, dry and wet main exhaust pipes, dry and wet auxiliary exhaust pipes, a 2s / turbine intake and exhaust pipe, and a turbine exhaust pipe. The intercooler includes a hot end inlet, a hot end outlet, a cold end inlet, and a cold end outlet. The hot end inlet is connected to the 1s exhaust pipe, and the hot end outlet is connected to the main exhaust pipe of the intercooler. The main exhaust pipe of the intercooler and the auxiliary exhaust pipe of the intercooler are connected by a T-junction. A shut-off valve is provided downstream of the auxiliary exhaust pipe of the intercooler. When the test is a dry and wet compression characteristic test of an interstage intercooled air compressor, the shut-off valve is in the open state, and in other cases, the shut-off valve is closed. The variable humidity steam supply system includes a steam generator, a pressure reducing valve, a pressure stabilizing tank, a steam regulating valve, a wet-dry mixer A, a wet-dry mixer B, steam line one, and steam line two. The steam generator's supply pressure and temperature are adjusted according to test requirements. The pressure reducing valve can reduce the steam pressure entering the pressure stabilizing tank. The opening of the steam regulating valve is adjusted to control the humidification amount. Steam line one and steam line two are respectively connected to wet-dry mixer A and wet-dry mixer B. Wet-dry mixer A and wet-dry mixer B are respectively placed in the air inlet pipe and the main exhaust pipe of the intercooler to mix the wet and dry working fluids so that the air reaches the target humidity requirement.

2. The fuel cell gas supply system dry-wet common path multi-conditioning test platform of claim 1, wherein, The coolant supply circuit includes a cooling water tank, a water pump, and a pneumatic regulating valve.

3. The fuel cell gas supply system dry-wet common path multi-conditioning test platform of claim 1, wherein, The main exhaust pipe of the intercooler is connected to the dry and wet inlet and outlet main pipes and the dry and wet main exhaust pipes via a T-junction. A filter is installed on the main exhaust pipe of the intercooler to separate the gas and liquid working fluid after wet compression by the integrated vortex-assisted electric drive single-stage air compressor.

4. The fuel cell gas supply system dry-wet common path multi-conditioning test platform of claim 3, wherein, Pneumatic flow control valve A and pneumatic flow control valve B are installed on the dry and wet main exhaust pipe and the dry and wet auxiliary exhaust pipe, respectively.

5. The fuel cell gas supply system dry-wet common path multi-conditioning test platform of claim 1, wherein, The intercooler auxiliary exhaust pipe end, the 2s / turbine inlet and outlet pipe and the turbine exhaust pipe are connected by a T-junction. The 2s / turbine inlet and outlet pipe are the inlet pipe of the second stage compressor and the exhaust pipe of the turbine respectively during the interstage cooling two-stage electric drive air compressor characteristic test and the integrated turbine-assisted electric drive single-stage air compressor characteristic test.

6. The fuel cell gas supply system dry-wet common path multi-conditioning test platform of claim 1, wherein, The online data acquisition system is used to collect sensor signals at target points in the test pipeline. The measured signals are connected to the host via bus communication. By comparing the measured values ​​with the target values, the control platform inputs specific instructions to control each actuator and component in the pipeline.

7. The fuel cell gas supply system dry and wet simultaneous multi-condition test platform according to claim 6, characterized in that, The online data acquisition system includes hardware and software components. The hardware components include a host computer, a monitor, a memory, an oscilloscope, a power supply, a programmer, input / output units (I / O), data acquisition devices, and a controller. The software components include LabVIEW graphical programming software for the host computer, software for the slave computer and PLC, and a communication protocol.

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