- Feedback Control System To Control The Composition Of The Output Stream In A Stirred Tank Blending Process Is Shown In F 1 (17.65 KiB) Viewed 48 times
- Feedback Control System To Control The Composition Of The Output Stream In A Stirred Tank Blending Process Is Shown In F 2 (38.98 KiB) Viewed 48 times
V Figure 11.1 Composition control system for a stirred tank blending process Mass fraction x of the output stream is the controlled variable, flow rate w 2 of the input stream is the manipulated variable and mass fraction x 1 of the other input stream is the disturbance variable. The following data are available: Volume and density are constant. V=3.2 mp 900 kg/m3 The process is operating at steady state with W 1500 kg/min, w 2-300 kg/min. 1-0.4.2-0.8 Gmkm-16 mA/mass fraction). GyKv - 20 kg/min MA The process transfer function GpXWWW 2 (8) - K1/rs+1) where TVp/w and K 1 -(1-WW The transfer function relative to the disturbanco variable g - XWX48K +1 where K 2 W1/W A Pl controller is used with Ko and T1 min The set point for the exit mans fraction is set at the initial steady stato value (a) of the disturbance variabile * 1 is suddenly decreased to 0.2 from the initial steady state value of 04, derive an expression for the response of bullet composition to this stop change Expression). (b) Calculate the composition of the exit stream (x) 1 minutes after the change. bx-min! (c) Calculate the composition of the exit stream 2 minutes after the change. (x-2min (d) What is the composition x when a new steady state is reached? (New-SS o What is the offset? (OFFSET