×
Log in to StudySoup
Get Full Access to Process Dynamics And Control - 3 Edition - Chapter 11 - Problem 11.11
Join StudySoup for FREE
Get Full Access to Process Dynamics And Control - 3 Edition - Chapter 11 - Problem 11.11

Already have an account? Login here
×
Reset your password

A mixing process consists of a single stirred-tank

Process Dynamics and Control | 3rd Edition | ISBN: 9780470128671 | Authors: Dale E. Seborg ISBN: 9780470128671 148

Solution for problem 11.11 Chapter 11

Process Dynamics and Control | 3rd Edition

  • Textbook Solutions
  • 2901 Step-by-step solutions solved by professors and subject experts
  • Get 24/7 help from StudySoup virtual teaching assistants
Process Dynamics and Control | 3rd Edition | ISBN: 9780470128671 | Authors: Dale E. Seborg

Process Dynamics and Control | 3rd Edition

4 5 1 388 Reviews
21
3
Problem 11.11

A mixing process consists of a single stirred-tank instrumented as shown in Fig. E11.11. The concentration of a single species A in the feed stream varies. The controller attempts to compensate for this by varying the flow rate of pure A through the control valve. The transmitter dynamics are negligible. (a) Draw a block diagram for the controlled process. (b) Derive a transfer function for each block in your block diagram. Process (i) The volume is constant (5m3). (ii) The feed flow rate is constant CiiF = 7m3/min). (iii) The flow rate of the A stream varies but is small compared to qp (qA = 0.5 m3/min). (iv) cp =50 kg/m3 and cA = 800 kg/m3. (v) All densities are constant and equal. Transfer Line (i) The transfer line is 20 m long and has 0.5 m inside diameter. (ii) Pump volume can be neglected. Composition Transmitter Data Cm (rnA) 4 20 Transmitter dynamics are negligible. PID Controller (i) Derivative on measurement only ( cf. Eq. 8-17) (ii) Direct or reverse acting, as required (iii) Current (rnA) input and output signals liP Transducer Data p (rnA) 4 20 Pt (psig) 3 15 Control Valve An equal percentage valve is used, which has the following relation: Pv-3 qA = 0.17 + 0.03 (20) 12 For a step change in input pressure, the valve requires approximately 1 min to move to its new position.

Step-by-Step Solution:
Step 1 of 3

Lectures w,11 be on C6Y>1p0isI' ---- - - WUkl LturL\r1,:overv,el\J r;f � :Jtwi I� -lffAmibrtvitw leH1..o-e.)eot1w.r f'�� ffiont ��{: _ �fO.DS ovc "-'70!land 1s /\J30\ f{ilOri'AP hold "'-'tS/4[0Ylh'S {ye_Sh,.(.JO;Cft r 1c .Pal.Pr 1cc.._Gl� e,nd gvr��\al'ld 1ce_-6tJ;>�-�� .- -" Clovas g -±-t�3 :.u6l.�(1 1�

Step 2 of 3

Chapter 11, Problem 11.11 is Solved
Step 3 of 3

Textbook: Process Dynamics and Control
Edition: 3
Author: Dale E. Seborg
ISBN: 9780470128671

Other solutions

People also purchased

Related chapters

Unlock Textbook Solution

Enter your email below to unlock your verified solution to:

A mixing process consists of a single stirred-tank