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[AndyTau]

Hi, everybody. Now I'm simulating a LNG plant dynamics, the simulation begins in dynamics mode directly because the kettle reboiler  in HYSYS can only be used in dynamics mode. My problem is, in a tank with a vapor feed and a liquid one, the tank's vapor outlet flow always fluctuates. I've checked the  holdup of the tank and it shows that the accumulations of vapor and liquid phase also fluctuate.

    My confusion is whether the fluctuation of the vapor and liquid phase holdup is the reason that tank's vapor outlet can't be stabilized? What shall I do?

    Tanks a lot.