Flash Drum Upstream Pressure effect


I created a Flash Drum for Oil flash calculation, I´m getting a fair result I think, with the conditions I got from field and results from Hysys, but when I started changing the upstream pressure (oil stream) I noticed the mass flow of the vapor coming out the drum doesn´t change. Should´n the mass flow of the vapor phase change when changing the upstrem pressure (stream coming in the Drum), if pressure in the flash drum is kept the same?

Link for simulation:


Screenshots of both upstream pressures showing no change on Vapor fase mass flow:


DWSIM 03-05-21, 5:49 a.m. diego.garcia
The link shared for the simulation file is not active. Kindly email the simulation file to contact-dwsim@fossee.in
04-05-21, 12:37 p.m. Priyam_Nayak

Thank you. Already sent the email.
06-05-21, 5:13 a.m. diego.garcia

If the pressure of the flash drum is kept the same, change in the pressure of the inlet material stream will not have any effect on the product streams. This is because, as the stream enters the drum, the feed stream pressure is overridden by the flash drum pressure which is kept constant and therefore you don't see any change in the mass flow of the vapor coming out of the drum.
11-05-21, 12:26 p.m. Priyam_Nayak

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