Pressure Vessel Discharge Time
Pressure Vessel Discharge Time
(OP)
I am trying to calculate the amount of time it will take compressed air to discharge from a pressure vessel through an orifice.
Here are the varibles.
Vessel volume at 14.7 PSI: 11.52 cubic feet
Filled Pressure: 120 PSI
Volume of compressed air at 120 PSI: 94.04 cubic feet
Orifice Diameter: 3.75"
I originally calculated the amount of flow through a 3.75" orifice at 120 PSI. Then I determined the time by the amount of flow and vessel volume. I am having second thoughts about this because the flow is not constant as the vessel is discharging. The volume and pressure is decreasing which I believe would affect the discharge time.
Anyone have any thoughts or suggestions on this?
Thanks,
Casey
Here are the varibles.
Vessel volume at 14.7 PSI: 11.52 cubic feet
Filled Pressure: 120 PSI
Volume of compressed air at 120 PSI: 94.04 cubic feet
Orifice Diameter: 3.75"
I originally calculated the amount of flow through a 3.75" orifice at 120 PSI. Then I determined the time by the amount of flow and vessel volume. I am having second thoughts about this because the flow is not constant as the vessel is discharging. The volume and pressure is decreasing which I believe would affect the discharge time.
Anyone have any thoughts or suggestions on this?
Thanks,
Casey





RE: Pressure Vessel Discharge Time
Here is a link for an approximation of pressurized gas discharge rate to atmosphere
http://www.cheresources.com/discharge.shtml
Vita sine litteris mors est.
RE: Pressure Vessel Discharge Time
RE: Pressure Vessel Discharge Time
RE: Pressure Vessel Discharge Time