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This paper presents a virtual monitoring approach for a gravity separator. It is used to separate the three phases oil, water and gas. The monitored variables are thereby the gaseous and liquid inflows as well as the effective split ratio of oil and water entering the continuous water phase. Measurements for these variables are either expensive, unreliable or even impossible to take (as for the split...
In this work we introduce a simple gravity separator model for liquid level and pressure control as well as evaluation of separation efficiencies for the water and oil continuous phases, respectively. The model incorporates three dynamic state equations describing the levels of the overall liquid and water as well as the gas pressure subject to the in- and outflow dynamics. In addition, algebraic...
Compact separators are increasingly used for subsea separation of hydrocarbons, because of their low weight and low cost. A problem is their small volume, which makes them very sensitive to flow variations. This can degrade separation performance, which in turn can cause operational problems and economic loss. Improved control can increase robustness and therefore, the focus of this paper is to derive...
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