Using the control loops in Table E.2.7 and E.2.8 with, the full composition model created in Exercise

Question:

Using the control loops in Table E.2.7 and E.2.8 with, the full composition model created in Exercise 24.1, evaluate the use of ratio control in Loop 2 of Table 24.4. In particular, indicate why ratio control should improve the plant performance for production rate (W4 set point) changes, but not for disturbance (x2D) changes. Your responses should be similar to those in Figures 24.6 and24.7.