Dynamic control for a natural circulation loop

In the present paper a control strategy is outlined to avoid instabilities in a rectangular natural circulation loop. A mathematical model linearized using the stationary solutions was used together with a standard P.I.D. control to counteract the birth of the instabilities inside the loop. The proposed strategy was tested both with numerical simulation and with experimental tests. In both cases the strategy control was suitable to avoid the flow inversion of the working fluid inside the loop.