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Help on a medium fidelity seperator model

Help on a medium fidelity seperator model

Help on a medium fidelity seperator model

(OP)
Hi,

I am charged with doing a medium fidelity simultion of a gas/oil/water seperator.  It is controlled at 50psig with a water interface LIC for the bottom water and a weir over which the oil flows when over a particular level.

I have it modelled somewhat as I would expect it to act in real life.  I know the oil and water flowrates in.  The retention time I am saying is the holdup in MBD divided by the (water + oil flowrates out).  How would I model this though for intial startup as retention time would be infinity with no flow rates out but holdup increasing (thus producing immediate and full seperation which isn't correct I presume).  It would seemingly work for the steady state condition.

Also, what if the vessel was inventoried already with a fully seperated volume of water and oil.

Any help would be appreciated!

Thanks,
Greg

RE: Help on a medium fidelity seperator model

(OP)
Hi, clarificatioin regarding the original post, it is obviously controlled to 50 psig with a PIC on the vent line to flare.  The water interface is controlled by the LIC.

Any help would be very much appreciated!  Thanks and have a productive day problem solving!

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