ABSTRACT
The previous chapter covered most of the details of developing, stalling up and running a dynamic simulation. A very simple tank level and pressure control example was used. In this chapter we extend our coverage slightly to include a composition controller that requires a rigorous tuning procedure. The process considered is a blending tank with two feed streams. There arc several controllers required to operate even this simple unit: a composition controller, a level controller, a pressure controller and two for three) flow controllers. We move from a steady-state simulation into a dynamic simulation, install controllers and stripchart recorders, install a deadtime in the composition loop, tune this controller and evaluate performance. These procedures are presented using both I IYSYS and AspenDynamics.
