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    Measuring Airflow and Static Pressure

    Time:2014-10-16

     An amca standsrd 210 double chamber is used to accurately measure air volume and static pressure.

    Ust of equations and variable

    Q:Air Volume=60XCXπ/4XD²=M2g/rxPn(m³/min)

    C:Coefficient of nozzle air volume

    r:Air Density=1.293

    T:Temperature(°C)

    P:Air pressure(mmH2O)

    Pn:Differential pressure of air volume(mmH2O)

    Ps:Static pressure(mmH2O)

    g:9.8m/sec²

    Maximum static pressure and maximum air volume measurements must be taken separately.

    Maximum static pressure measurement:When the nozzle is closed,the pressure in chamber A will reach a maximum.The pressure difference Ps represents the maximum static pressure achievable by the fan.

    Maximum air volume measurement:The nozzle is opened and the auxiliary blowers is used to lower the pressure in chamber A to Ps=0. The maximum air volume can then be calculated using Pn,D and the air volume equation above.Q represents the maximum achievable airflow with the fan in free air.

     

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