Fan circulating type testing device and testing method

Abstract

The invention relates to a fan circulation type testing device which comprises a frame, the frame is provided with a pipeline and a fan, the pipeline is a circulation loop, one end of the pipeline is connected with an air inlet of the fan, the other end of the pipeline is connected with an air outlet of the fan, the pipeline is provided with an air inlet and an air outlet, the frame is provided with a differential pressure transmitter, and the differential pressure transmitter is provided with two pressure guide pipes. The two pressure guide pipes are respectively communicated with an air inlet and an air outlet of the fan, the pipeline is provided with a regulating valve and a pressure transmitter, and the pipeline is provided with a plurality of temperature sensors. The testing method of the fan circulating type testing device has three working condition types: normal temperature testing, and heating and humidification not being started; high-temperature test: starting heating without starting humidification; and carrying out high-temperature humidification test, and starting heating and humidification. Test is carried out in a closed pipeline, the problem of treatment before combustible gas emission can be avoided, and the problem of high-temperature gas emission can also be avoided.

Description

Technical Field

[0001] The invention relates to a fan test of a solid oxide fuel cell (SOFC) system, and in particular to a fan circulation test device and a test method. Background Art

[0002] Solid oxide fuel cell (SOFC) is a new type of power generation device. Its high efficiency, pollution-free, all-solid-state structure and wide adaptability to a variety of fuel gases are the basis for its widespread application.

[0003] In addition to the core equipment stack module, the solid oxide fuel cell system also includes a large number of auxiliary equipment, such as heat exchangers, electric heaters, fans, valves, electrical control cabinets, sensors, etc. These devices are connected into a whole through pipes and cables and placed in a space wrapped in steel structure to form a modular system.

[0004] In order to test the fan performance of the solid oxide fuel cell system, a high-temperature, high-humidity combustible gas is used as the medium for testing. However, since the medium is a combustible gas, it is not allowed to be discharged to the outside, and the medium is a high-temperature gas, and direct discharge will affect the environment. In addition, during the test, the humidity of the medium gas needs to be adjusted. The test method of the prior art cannot flexibly adjust the humidity of the medium gas, and the medium gas needs to be processed before discharge. Summary of the invention

[0005] The object of the present invention is to provide a fan circulation test device and test method, which can perform the test in a closed pipeline, thereby avoiding the problem of handling combustible gas before discharge and also avoiding the problem of high-temperature gas discharge.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A fan circulation test device comprises a frame, the frame is provided with a pipeline and a fan, the pipeline is a circulation loop, one end of the pipeline is connected to the air inlet of the fan, and the other end of the pipeline is connected to the air outlet of the fan, the pipeline is provided with an air inlet and an air outlet, the frame is provided with a differential pressure transmitter, the differential pressure transmitter is provided with two pressure-leading pipes, the two pressure-leading pipes are respectively connected to the air inlet and the air outlet of the fan, the pipeline is provided with a regulating valve and a pressure transmitter, the pipeline is provided with several temperature sensors, the pipeline is provided with a flow sensor and a humidity sensor, the circulation test device is provided with a control cabinet, and the fan, differential pressure transmitter, regulating valve, pressure transmitter, temperature sensor, flow sensor and humidity sensor are all electrically connected to the control cabinet.

[0008] Specifically, along the airflow direction, the pipeline on the air outlet side of the fan is provided with a first temperature sensor and an air outlet in sequence.

[0009] Specifically, along the air flow direction, the pipeline at the rear side of the air outlet is provided with a humidity sensor and a pressure transmitter in sequence.

[0010] Specifically, along the air flow direction, the pipeline on the rear side of the pressure transmitter is provided with a regulating valve and an air inlet in sequence.

[0011] Specifically, along the air flow direction, the pipe at the rear side of the air inlet is provided with a heater and a second temperature sensor in sequence.

[0012] Specifically, along the airflow direction, the pipeline behind the second temperature sensor is provided with a flow sensor and a third temperature sensor in sequence.

[0013] Specifically, the medium passed through the pipeline is combustible gas.

[0014] The test method of the fan circulation test device comprises the following steps:

[0015] Speed ​​setting steps: adjust the fan speed to the set speed;

[0016] Heating test determination steps: If it is determined to be a heating test, turn on the heater; if it is not a heating test, determine the fan boost and the pressure in the pipe:

[0017] The above steps for determining the fan pressure rise are as follows: if the fan pressure rise is too large, increase the opening of the regulating valve; if the fan pressure rise is too small, decrease the opening of the regulating valve; if the fan pressure rise meets the requirements, record the fan speed, fan pressure rise, pipe pressure, pipe temperature of the gas to be measured, pipe humidity, and flow rate at the operating point;

[0018] The above steps for determining the pressure in the pipe are as follows: if the pressure in the pipe exceeds the set value, the outlet slowly releases the pressure to reduce the pressure; if the pressure in the pipe does not exceed the set value, the fan speed, fan pressure rise, pipe pressure, temperature of the gas to be measured in the pipe, humidity in the pipe, and flow rate values ​​at the operating point are recorded;

[0019] Humidification test determination steps: if it is determined to be a humidification test, water or water vapor is introduced into the air inlet, and then it is determined whether the humidity in the pipe reaches the specified humidity. If it does not reach the specified humidity, water or water vapor is continued to be introduced into the air inlet; if it reaches the specified humidity, the fan boost determination step, the pipe pressure determination step and the pipe temperature determination step are performed;

[0020] The above fan pressure rise determination steps are: if the fan pressure rise is greater than the set range, the opening of the regulating valve is increased; if the fan pressure rise is less than the set range, the opening of the regulating valve is decreased; if the fan pressure rise meets the set range, the fan speed, fan pressure rise, pipe pressure, pipe temperature of the gas to be measured, pipe humidity, and flow rate values ​​at the operating point are recorded;

[0021] The above-mentioned steps for determining the pressure in the pipe are as follows: if the pressure in the pipe exceeds the set value, the outlet slowly releases the pressure to reduce the pressure; if the pressure in the pipe does not exceed the set value, the fan speed, fan pressure rise, pipe pressure, temperature of the gas to be measured in the pipe, humidity in the pipe, and flow rate values ​​at the operating point are recorded;

[0022] The above-mentioned steps for determining the temperature of the gas to be measured in the pipe are as follows: if the temperature of the gas to be measured in the pipe is lower than the set value, the output power of the heater is increased; if the temperature of the gas to be measured in the pipe is higher than the set value, the fan speed, fan pressure rise, pipe pressure, pipe temperature of the gas to be measured, pipe humidity, and flow rate at the operating point are recorded.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The invention solves the problem of testing a blower for a solid oxide fuel cell (SOFC) system when the medium is a high-temperature and high-humidity combustible gas medium.

[0025] Since the high-temperature fan medium used in the SOFC system is a combustible gas, continuous external emission is not allowed. Testing in a closed pipeline can avoid the problem of handling combustible gases before emission and the problem of high-temperature gas emission. And the gas heated to the test temperature in the closed pipeline only needs to provide a small amount of electric heating power to maintain the temperature. The gas that reaches the test humidity after humidification does not need to be continuously mixed with water vapor for humidification when circulating in the closed pipeline. Therefore, the electric power input for heating and humidification can be greatly reduced, and long-term testing can save a lot of operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A view of a fan circulation test device;

[0028] Figure 2 A view of a fan circulation test device;

[0029] Figure 3 This is the logic block diagram of the test method for the fan circulation test device.

[0030] In the figure:

[0031] 1. Frame; 2. Fan;

[0032] 3. Pipeline; 31. Heater; 32. Regulating valve; 33. Flow sensor; 34. Differential pressure transmitter; 341. Pressure lead pipe; 35. Humidity sensor; 36. Pressure transmitter; 371. First temperature sensor; 372. Second temperature sensor; 373. Third temperature sensor; 38. Air inlet; 39. Air outlet;

[0033] 4. Control cabinet. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] See Figure 1 to Figure 2 A fan circulation test device includes a frame 1, and the frame 1 is provided with a pipeline 3 and a fan 2. The pipeline 3 is a circulation loop, one end of the pipeline 3 is connected to the air inlet of the fan 2, and the other end of the pipeline 3 is connected to the air outlet of the fan 2. The pipeline 3 is provided with an air inlet 38 and an air outlet 39. The frame 1 is provided with a differential pressure transmitter 34, and the differential pressure transmitter 34 is provided with two pressure pipes 341, and the two pressure pipes 341 are respectively connected to the air inlet and the air outlet of the fan 2.

[0036] The pipeline 3 is provided with a regulating valve 32 and a pressure transmitter 36. The pipeline 3 is provided with a plurality of temperature sensors, and the pipeline 3 is provided with a flow sensor 33 and a humidity sensor 35. The circulating test device is provided with a control cabinet 4. The fan 2, the differential pressure transmitter 34, the regulating valve 32, the pressure transmitter 36, the temperature sensor, the flow sensor 33 and the humidity sensor 35 are all electrically connected to the control cabinet 4.

[0037] Specifically, along the air flow direction, the pipeline on the air outlet side of the fan 2 is provided with a first temperature sensor 371 and an air outlet 39 in sequence.

[0038] Specifically, along the air flow direction, the pipe at the rear side of the air outlet 39 is provided with a humidity sensor 35 and a pressure transmitter 36 in sequence.

[0039] Specifically, along the air flow direction, the pipeline on the rear side of the pressure transmitter 36 is provided with a regulating valve 32 and an air inlet 38 in sequence.

[0040] Specifically, along the air flow direction, the pipe at the rear side of the air inlet 38 is provided with a heater 31 and a second temperature sensor 372 in sequence.

[0041] Specifically, along the airflow direction, the pipeline behind the second temperature sensor 372 is provided with a flow sensor 33 and a third temperature sensor 373 in sequence.

[0042] Specifically, the medium passed through the pipeline 3 is combustible gas.

[0043] See Figure 3 , a test method for a fan circulation test device comprises the following steps:

[0044] Speed ​​setting steps: adjust the speed of fan 2 to the set speed;

[0045] Heating test determination steps: if it is determined to be a heating test, the heater 31 is turned on; if it is not a heating test, the fan pressure is determined and the pressure in the pipe is determined:

[0046] The above-mentioned steps for determining the fan pressure increase are as follows: if the fan pressure increase is too large, the opening of the regulating valve 32 is increased; if the fan pressure increase is too small, the opening of the regulating valve 32 is decreased; if the fan pressure increase meets the requirements, the fan speed, fan pressure increase, pipe pressure, pipe temperature of the gas to be measured, pipe humidity, and flow rate values ​​at the operating point are recorded;

[0047] The above-mentioned step of determining the pressure in the pipe: if the pressure in the pipe exceeds the set value, the outlet 39 slowly releases the pressure to reduce the pressure; if the pressure in the pipe does not exceed the set value, the fan speed, fan pressure rise, pipe pressure, temperature of the gas to be measured in the pipe, humidity in the pipe, and flow rate values ​​at the operating point are recorded;

[0048] Humidification test determination step: if it is determined to be a humidification test, water or water vapor is introduced into the air inlet 38, and then it is determined whether the humidity in the pipe reaches the specified humidity. If it does not reach the specified humidity, water or water vapor is continued to be introduced into the air inlet 38; if it reaches the specified humidity, the fan boost determination step, the pipe pressure determination step and the pipe temperature determination step are performed;

[0049] The above-mentioned fan pressure rise determination steps: if the fan pressure rise is greater than the set range, the opening of the regulating valve 32 is increased; if the fan pressure rise is less than the set range, the opening of the regulating valve 32 is decreased; if the fan pressure rise meets the set range, the fan speed, fan pressure rise, pipe pressure, pipe temperature of the gas to be measured, pipe humidity, and flow rate values ​​at the operating point are recorded;

[0050] The above-mentioned step of determining the pressure in the pipe: if the pressure in the pipe exceeds the set value, the outlet 39 slowly releases the pressure to reduce the pressure; if the pressure in the pipe does not exceed the set value, the fan speed, fan pressure rise, pipe pressure, temperature of the gas to be measured in the pipe, humidity in the pipe, and flow rate values ​​at the operating point are recorded;

[0051] The above-mentioned steps for determining the temperature of the gas to be measured in the pipe are as follows: if the temperature of the gas to be measured in the pipe is lower than the set value, the output power of the heater 31 is increased; if the temperature of the gas to be measured in the pipe is higher than the set value, the values ​​of the fan speed, fan pressure rise, pipe pressure, temperature of the gas to be measured in the pipe, humidity in the pipe, and flow rate at the operating point are recorded.

[0052] The working principle of the fan circulation test device is as follows:

[0053] The combustible gas to be tested circulates in the pipeline 3 driven by the fan 2. A heater 31 is provided in the pipeline 3, and the heater 31 is used to heat the combustible gas to be tested to a specified temperature and continuously consume a small amount of electric power to maintain the temperature of the combustible gas to be tested in the pipeline 3.

[0054] The pipeline 3 is provided with a regulating valve 32. By controlling the opening of the regulating valve 32, the overall resistance in the pipeline 3 can be adjusted, thereby adjusting the pressure rise of the fan 2 to a specified value.

[0055] The pipeline 3 is provided with a flow sensor 33 , and the flow sensor 33 is used to detect the gas flow in the pipeline 3 .

[0056] The frame 1 is provided with a differential pressure transmitter 34 , which is respectively connected to the air inlet and air outlet of the pipeline 3 close to the fan 2 through two pressure-conducting pipes 341 . The differential pressure transmitter 34 is used to detect the pressure rise value of the fan 2 .

[0057] The pipeline 3 is provided with a humidity sensor 35 , and the humidity sensor 35 is used to detect the humidity of the gas in the pipeline 3 .

[0058] The pipeline 3 is provided with at least one pressure transmitter 36 for detecting the pressure at a specified position in the pipeline 3, such as the fan inlet pressure, the fan outlet pressure, and the like.

[0059] The pipeline 3 is provided with a first temperature sensor 371, a second temperature sensor 372 and a third temperature sensor 373. The first temperature sensor 371, the second temperature sensor 372 and the third temperature sensor 373 are used to detect the temperature of a specified position in the pipeline 3, such as the fan inlet temperature, the fan outlet temperature, the heater 31 outlet temperature, etc.

[0060] The pipeline 3 is provided with an air inlet 38 and an air outlet 39, which are used for gas replacement of the test device, introduction or discharge of the medium to be tested, overpressure relief, humidification, etc. The air inlet 38 and the air outlet 39 can be set with different numbers and functions according to the test needs. For example, different gas inlets 38 can be set to form a mixed gas, or a humidification inlet (such as the air inlet 38) can be set separately according to the humidification method (adding steam or water), and a discharge and exhaust port (such as the air outlet 39) can also be specially set.

[0061] The fan 2, the pipeline 3 and all the components provided on the pipeline 3 have good temperature resistance and sealing performance, and the connection therebetween also has good sealing performance.

[0062] A control cabinet 4 is installed on the frame 1. The fan 2, heater 31, regulating valve 32, flow sensor 33, differential pressure transmitter 34, humidity sensor 35, pressure transmitter 36, and temperature sensor are connected to the control module in the control cabinet 4 through wires to realize power supply, control, feedback, display and parameter recording of each component. The control cabinet 4 can realize remote transmission with the host computer or computer through communication signals.

[0063] The working principle of the test method of the fan circulation test device is as follows:

[0064] After starting the test, the process determines whether it is a heating test or a humidification test, thereby dividing the fan test into three operating conditions: 1. Normal temperature test, without starting heating and humidification; 2. High temperature test, with heating started but not humidification; 3. High temperature and humidification test, with heating and humidification started.

[0065] During the test, due to the continuous work of the fan, the pressure in the pipeline will continue to rise and the medium temperature will also increase to a certain extent.

[0066] When the fan reaches a certain set speed:

[0067] If the fan pressure rise (i.e., the measured value of the differential pressure transmitter 34) exceeds the set range, the valve opening is increased to reduce the pressure loss at the valve, thereby reducing the total resistance of the entire test pipeline and reducing the fan pressure rise; otherwise, the valve opening is reduced until the fan pressure rise reaches the set requirement.

[0068] If the pressure in the pipeline (ie, the measured value of the pressure transmitter 36) exceeds the set value, a portion of the gas is slowly released from the gas outlet 39 to reduce the pressure in the test pipeline until the set requirement is reached.

[0069] If the temperature of the medium gas to be tested decreases due to the heat loss of the outer surface of the test system exceeding the heat brought to the medium gas to be tested by the fan compression and the output of the heater 31, the output power of the heater 31 is increased until a thermal equilibrium state is reached and the temperature of the medium gas to be tested remains unchanged.

[0070] The above-mentioned fan pressure rise, pipeline pressure, and medium temperature adjustments are carried out simultaneously, and finally a stable state of the fan operating point is reached, and the values ​​of the fan speed, fan pressure rise, pipe pressure, measured gas temperature in the pipe, pipe humidity, and flow rate at the operating point are recorded.

[0071] When testing, there are mainly two ways to test different working conditions in the same fan application scenario:

[0072] Adjust the speed (frequency), pressure rise, pressure, temperature, and humidity to a certain set of values ​​to see whether the flow rate can cover the requirements of the maximum and minimum operating conditions. Adjust the pressure rise, pressure, temperature, humidity, and flow rate to the parameters corresponding to the operating conditions, record the speed (frequency), and provide guidance for the actual operation of the fan.

[0073] In addition, the best working state of the fan is generally the rated state (frequency 50Hz), but in the case of variable frequency regulation, it will generally deviate from this optimal state. This is true for all operating conditions. We will conduct continuous testing for a long time under specific operating conditions (generally maximum operating conditions), and record a set of the above data at regular intervals to test the stability of the data and reflect the stability of the fan.

[0074] When setting the set value of the pressure in the pipe, if the fan is open for testing and there is no pressure source at the fan inlet, the fan inlet is generally at 0 pressure or a certain negative pressure.

[0075] However, in a closed loop, the pressure can be adjusted to a specific positive pressure value, or negative pressure and 0 pressure as needed. When the fan is working continuously, the pressure in the pipeline continues to rise (the fan pressure rise will not change much), and the ultimate limit can reach a very high positive pressure. It only needs to properly release a certain amount of medium to reduce the pressure and stabilize it at the required point.

[0076] The beneficial effects of the present invention are:

[0077] The invention solves the problem of testing a blower for a solid oxide fuel cell (SOFC) system when the medium is a high-temperature and high-humidity combustible gas medium.

[0078] Since the high-temperature fan medium used in the SOFC system is a combustible gas, continuous external emission is not allowed. Testing in a closed pipeline can avoid the problem of handling combustible gases before emission and the problem of high-temperature gas emission. And the gas heated to the test temperature in the closed pipeline only needs to provide a small amount of electric heating power to maintain the temperature. The gas that reaches the test humidity after humidification does not need to be continuously mixed with water vapor for humidification when circulating in the closed pipeline. Therefore, the electric power input for heating and humidification can be greatly reduced, and long-term testing can save a lot of operating costs.

[0079] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above in the form of preferred embodiments, it is not intended to limit the present invention. Any technical personnel in the field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A fan circulation test device, characterized in that: The utility model comprises a frame, wherein the frame is provided with a pipeline and a fan, wherein the pipeline is a circulation loop, wherein one end of the pipeline is connected to the air inlet of the fan, and the other end of the pipeline is connected to the air outlet of the fan, and the pipeline is provided with an air inlet and an air outlet, and the frame is provided with a differential pressure transmitter, and the differential pressure transmitter is provided with two pressure-leading pipes, and the two pressure-leading pipes are respectively connected to the air inlet and the air outlet of the fan, and the pipeline is provided with a regulating valve and a pressure transmitter, and the pipeline is provided with several temperature sensors, and the pipeline is provided with a flow sensor and a humidity sensor, and the circulation test device is provided with a control cabinet, and the fan, the differential pressure transmitter, the regulating valve, the pressure transmitter, the temperature sensor, the flow sensor and the humidity sensor are all electrically connected to the control cabinet.

2. The fan circulation test device according to claim 1 is characterized in that: Along the airflow direction, the pipeline on the air outlet side of the fan is provided with a first temperature sensor and an air outlet in sequence.

3. The fan circulation test device according to claim 2 is characterized in that: Along the airflow direction, the pipe on the rear side of the air outlet is provided with a humidity sensor and a pressure transmitter in sequence.

4. The fan circulation test device according to claim 3 is characterized in that: Along the air flow direction, the pipeline on the rear side of the pressure transmitter is provided with a regulating valve and an air inlet in sequence.

5. The fan circulation test device according to claim 4 is characterized in that: Along the airflow direction, a heater and a second temperature sensor are sequentially arranged on the pipe at the rear side of the air inlet.

6. The fan circulation test device according to claim 5 is characterized in that: Along the airflow direction, the pipeline behind the second temperature sensor is provided with a flow sensor and a third temperature sensor in sequence.

7. The fan circulation test device according to claim 1 is characterized in that: The medium passed through the pipeline is combustible gas.

8. The testing method of the fan circulation testing device according to claim 1, characterized in that: The following steps are involved: Speed ​​setting steps: adjust the fan speed to the set speed; Heating test determination steps: If it is determined to be a heating test, turn on the heater; If it is not a heating test, determine the fan pressure increase and determine the pressure in the pipe: The above steps for determining the fan pressure rise are as follows: if the fan pressure rise is too large, increase the opening of the regulating valve; if the fan pressure rise is too small, decrease the opening of the regulating valve; if the fan pressure rise meets the requirements, record the fan speed, fan pressure rise, pipe pressure, pipe temperature of the gas to be measured, pipe humidity, and flow rate at the operating point; The above steps for determining the pressure in the pipe are as follows: if the pressure in the pipe exceeds the set value, the outlet slowly releases the pressure to reduce the pressure; if the pressure in the pipe does not exceed the set value, the fan speed, fan pressure rise, pipe pressure, temperature of the gas to be measured in the pipe, humidity in the pipe, and flow rate values ​​at the operating point are recorded; Humidification test determination steps: if it is determined to be a humidification test, water or water vapor is introduced into the air inlet, and then it is determined whether the humidity in the pipe reaches the specified humidity. If it does not reach the specified humidity, water or water vapor is continued to be introduced into the air inlet; if it reaches the specified humidity, the fan boost determination step, the pipe pressure determination step and the pipe temperature determination step are performed; The above fan pressure rise determination steps are: if the fan pressure rise is greater than the set range, the opening of the regulating valve is increased; if the fan pressure rise is less than the set range, the opening of the regulating valve is decreased; if the fan pressure rise meets the set range, the fan speed, fan pressure rise, pipe pressure, pipe temperature of the gas to be measured, pipe humidity, and flow rate values ​​at the operating point are recorded; The above-mentioned steps for determining the pressure in the pipe are as follows: if the pressure in the pipe exceeds the set value, the outlet slowly releases the pressure to reduce the pressure; if the pressure in the pipe does not exceed the set value, the fan speed, fan pressure rise, pipe pressure, temperature of the gas to be measured in the pipe, humidity in the pipe, and flow rate values ​​at the operating point are recorded; The above-mentioned steps for determining the temperature of the gas to be measured in the pipe are as follows: if the temperature of the gas to be measured in the pipe is lower than the set value, the output power of the heater is increased; if the temperature of the gas to be measured in the pipe is higher than the set value, the fan speed, fan pressure rise, pipe pressure, pipe temperature of the gas to be measured, pipe humidity, and flow rate at the operating point are recorded.

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