Nitrogen Flow Conversion 1

[TJT]

Hello,
The plant that I'm working in would like me to change the units of our nitrogen flow meter from MT/Day to M3/Hr. The density of the nitrogen is 1.251 g/l. I realize that we are moving from a mass flow measurement to a volumetric flow, but since we were never compensating for the pressure and temperature of the nitrogen, we shouldn't have used MT/Day.
Currently the transmitter is calibrated for 0 - 25 MT/Day.
Does anyone have a conversion method?
Thanks.....Tim

 

[dcasto]

mass divided by density at standard conditions yields volume.

OR do you want ACFM?

 

[TJT]

Thanks dcasto,
I do have access to the pressure of the line & since the temperature is constant, I'd probably go with NM3/hr.

 

[TJT]

My procees conditions for the Nitrogen are 355kPa and a temperature of 15 degC. Do you know how I would find the density at these conditions? Is there a way to normalize this reading? (to read in Nm3/Hr)
Thanks

 

[dcasto]

You can use gas law PV=znRT. Peng Robinson EOS says the N2 has a z factor .998451 at your conditions.

Here's a site that does some calculations

http://www.peace-software.de/einigewerte/stickstoff_e.html