Oxygen flow rate issue
Thread Content
The pipeline is 200 mm in diameter, with a flow rate of 44,000 Nm3/h. So what is the oxygen flow velocity? 44,000/3,600 = 12.2 Nm3/h. 3.14/4 = 0.785. 0.2*0.2 = 0.04. 0.785*0.04 = 0.0314. 12.2/0.0314 = 388 m/s. I’m sure there’s an error here; I hope my fellow sailors can understand and won’t laugh at this poor guy
This post was last edited by ylb913 on 2016-9-30 at 13:55. The flow rate is calculated based on the volumetric flow under actual operating conditions (pressure, temperature), not using nominal values.
I hope Haiyou can help calculate it: temperature 20 degrees, pressure 8.0 MPa
Putting temperature aside, if the pressure is 10 kg/cm3 (absolute pressure), the flow rate must be divided by 10.
Using PV=nRT, without performing any detailed unit conversions for pressure, it is assumed to be 80 atmospheres; n=44000/22.4=1964, R=0.082, and T=273+20=293. Then the volumetric flow rate V = 1964*0.082*293/80 = 590 m3/h. 590/3600/0.0314=5.2m/s
Thank you, very much. I hope to receive more guidance in the future
Or use the value calculated earlier: 388/80/273*293=5.2 m/s
44,000 units Nm3, 22.4 L – how do I convert between these units? Guidance from a master,
Why is R 0.082?
8 megapascals, 8 MPa – such a high pressure!