How to convert the volumetric flow rate of nitrogen at standard conditions to mass flow rate
Thread Content
I would like to ask everyone: the design of the calculation sheet originally specified volumetric flow rate under standard conditions; at the site, a differential pressure flow meter is used, with 0–2000 mmH2O corresponding to 1125 nm3/h. Now the DCS wants to display mass flow rate – how should this conversion be carried out? The DCS range setting is 0~1406 KG/H; I guess it’s 1125*1.25=1406 KG/H. I’m not sure if that’s correct Is there anyone who can give some guidance? Thank you! 1.25 kg/m3 is the reference density under 1 atmosphere and 0°C conditions
If the measured value is the volume under standard conditions, then multiplying it by the density under standard conditions gives the mass
If an accurate measurement of gas flow rate is required, temperature and pressure compensation is usually necessary. The volumetric flow rate under standard conditions, after such compensation, is multiplied by the density under standard conditions to obtain the mass flow rate.
. . . Isn’t this basic chemical common sense? To convert volumetric flow rate at standard conditions to mass flow rate, you just need to divide by the density at standard conditions. .