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Convert Nm3/h to m3/h

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  • Convert Nm3/h to m3/h

    Hello,
    for my labwork, I need to express Nm3/h to m3/h. I know that the N of Nm3 stands for Normal, meaning standard temperature and pressure. So, I have used the following expression to calculate the volume in m3.

    V2 = P1*V1*T2/(T1*P2)

    My manometer gives a flow rate of 15 Nm3/h. So, by using the standard conditions (T1=273.15 K, P1=101325 Pa), I have found for different pressure at 298.15 K the following results :

    P2(Pa) 200000 400000 600000 T2=298.15K V1=15m3
    V2 (m3) 8.3 4.15 2.77

    for example ,V2=101325*15*298.15/(200000*273.15)

    I don't understand why the volume decreases when the pressure increases. could you help me please?

  • #2
    Re: Convert Nm3/h to m3/h

    Originally posted by alonso25
    I don't understand why the volume decreases when the pressure increases. could you help me please?
    The simplest analogy is inflating a tire. You take a relatively large amount of air at atmospheric pressure and "squeeze" it into the tire at higher pressure.

    Comment


    • #3
      Re: Convert Nm3/h to m3/h

      Thanks you for your answer.

      Comment

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