Industrial ventilation fan duct performance testing device

1、 The working fluid for standardized air duct testing should be atmospheric, and its pressure and temperature should be within the normal atmospheric range. There are four types of devices:

Type A: Free import, free export;

Type B: Free import, pipeline outlet;

--Type C: Pipe inlet, free outlet;

Type D: pipeline inlet, pipeline outlet.

GB/T 1236-2017/ISO 5801:2007 is applicable to the determination of the performance of various types of industrial ventilation fans, except for fans designed specifically for air circulation (such as ceiling fans, table fans),The evaluation method for measurement uncertainty and the conversion rules for test results under model test conditions, including speed, gas delivery, and size changes within the specified test range, are provided.

2、 Overall plan

This plan does not include the laboratory building structure, which will be constructed by the user according to standard requirements.

1. General requirements for the laboratory

Size: 4500 (width) x 6000 (length) x 2800 (height) mm or more.

Wall: Smooth and flat, without any openings that affect airflow (air conditioning openings should not be blown directly).

Ground: The ground should be kept flat.

Temperature and humidity: When measuring air volume, the air temperature in the laboratory is 20 ℃± 5 ℃ and the humidity is 30% -80% (the user should bring their own air conditioner or dehumidifier).

Atmospheric pressure: an ordinary atmospheric environment with an altitude not exceeding 1000 meters.

2. Testing system

Main components: air volume testing wind tunnel, auxiliary fan, measurement and control electrical cabinet (including variable frequency power supply, electrical parameter measuring instrument, pressure transmitter, tachometer, etc.), branded computer, printer, test sample lifting platform, test sample installation flange, and test air duct.

System function: After being prompted by the computer to input sample parameters and test related data, all automatic measurement and control functions can be achieved, including air volume measurement; Voltage, current, and power measurement; Speed measurement, temperature, humidity, and atmospheric pressure measurement, testing process prompts, data tables, relevant curves, etc.

3. Distribution requirements: Users must provide independent distribution switches, three-phase four wire plus ground wire power supply:AC380V, 50Hz ZUI Large Capacity: 5KVA

III Main technical parameters and indicators

1. Laboratory power supply: AC220V/AC380V50HZ; Capacity: 5KVA

2. Laboratory environment: 20 ℃± 5 ℃ Humidity: 30% -80% Atmospheric pressure: Normal

3. Measurement range of air volume: (0.06m3-50m3)/min

4. Static differential pressure: 0-2250Pa ± 0.2% Pa

5. Electrical parameters: The measurement accuracy of voltage, current, and power is level 0.5, with digital display instruments

Range: Voltage AC0-300V

Current AC0-5A

Power range 0-1000W

6. Speed: 0-19999 revolutions per minute ± 5RPM digital display

7. Air temperature: -10-100 ℃± 0.5 ℃

8. Air humidity: (5-99)% R · H ± 5%

9. Variable frequency stabilized power supply:

Input voltage: AC220V50HZ

Output voltage: AC0-110V-220V -300V continuously adjustable, ≤ 1%

Output frequency: 50HZ or 60HZ

Output power: 0-1000W

10. Operating condition testing, automatically adjustable flow orifice plate for testing and calculating items.

1）. Static pressure measured inside the pressure reducing cylinder: Ps6 (Pa)

2）. Input power: P (W)

3）. Airflow under experimental conditions: Qv (m3/s)

4）. Total pressure under test conditions: Pfb (Pa)

5）. Total pressure of air standard state: Pfbn (Pa)

6）. Static pressure under experimental conditions: Ps2n (pa)

7）. Total pressure efficiency under experimental conditions: η (%)

11. The measurement results that can be automatically calculated by the computer after the test is completed;

1）. Maximum static pressure (static pressure value at zero air volume): Ps2n (max) Pa

2）. Maximum airflow (airflow value at zero static pressure): Qv (max) m3/min

3）. Static pressure at specified air volume (7m3/min): Ps2nsPa

4）. Main motor input power at specified air volume (7m3/min): PW

5）. Total pressure efficiency at specified air volume (7m3/min): η%

12. It can measure the corresponding curves of static pressure and air volume, air volume and speed, current, power, efficiency, etc. The test sample can also be tested in both inhalation and excretion states.

13. Summary of testing ranges for various parameters