Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

Please include the block diagram of the process if possible, thank you! Considered the distillation column shown in Figure Q.4. P Feed (1) Accumulator D,

image text in transcribedimage text in transcribedimage text in transcribed

Please include the block diagram of the process if possible, thank you!

Considered the distillation column shown in Figure Q.4. P Feed (1) Accumulator D, Xe % Distillate (2) More VFC XE. Boil up V Steam In B. Xo % Bottoin (3) Condensate Figure Q.4 : Schematic of a distillation column Stream (1), the feed stream has a flowrates F (kg/hr) and the weight fraction of the more volatile component (MVC) is XF. Stream (2), the top product, has a flowrate of D (kg/hr) and the weight fraction of the MVC is Xp, while the bottom stream (3), the bottom product, has a flowrate, B (kg/hr) with a MVC weight fraction of XB. Suppose the following transfer function model has been identified; XD(S) D(S) kpeas 10s +1 -205 X,(s) ke F(s) 50s +1 = Where, the process gain, kp and k vary with process operating point due to the nonlinear nature of the process. The controlled variable is Xp(s), the manipulated variable is D(s) and the F(s) may be considered as a measured disturbance variable. Set the closed loop transfer function equal to a first order plus dead-time transfer function with a pain of 1, a time constant of 10 minutes, and a time delay of 2 minutes hence, analyse the stability of the system using the Routh stability method and determine the minimum and the maximum stable gain for the controller (Kc). Sensor/Transmitter: The sensor/transmitter has unitary gain (crc) Gm(s) = 1.0 Control valve: The control valve (linear characteristics) Gv(s) 1 2s +1 Controller: The controller is proportional only Ge(s) = K. Hints: Use the first order Pad approximation to express the exponential term in a rational form. [10 marks]

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Bioprocess Engineering Basic Concepts

Authors: Michael Shuler, Fikret Kargi, Matthew DeLisa

3rd Edition

0137062702, 978-0137062706

More Books

Students also viewed these Chemical Engineering questions

Question

' Do any measures show up for multiple objectives?

Answered: 1 week ago

Question

' How much control do you have over achieving your objectives?

Answered: 1 week ago