Process Dynamics And Control, 4e
Process Dynamics And Control, 4e
16th Edition
ISBN: 9781119385561
Author: Seborg, Dale E.
Publisher: WILEY
Question
Book Icon
Chapter 6, Problem 6.13E
Interpretation Introduction

Interpretation:

The transfer functions P1(s)Pd(s) and P2(s)Pd(s) for the given system are to be determined. The results are to be shown in the standard gain/time constant form. Also, for the second-order model, it is to be estimated if the system is overdamped or underdamped.

Concept introduction:

For chemical processes, dynamic models consisting ordinary differential equations are derived through unsteady-state conservation laws. These laws generally include mass and energy balances.

The process models generally include algebraic relationships which commence from thermodynamics, transport phenomena, chemical kinetics, and physical properties of the processes.

The difference in the actual variable (y) and the original variable (y¯) is known as deviation variable (y) .It is generally used while modelling a process. Mathematically it is defined as:

y=yy¯

In steady-state process, the accumulation in the process is taken as zero.

For the second order transfer function of the form,

G(s)=Y(s)U(s)=Kτ2s2+2ζτs+1   ...... (1)

Where, K,τ, and ζ are the system parameters, the system is overdamped if ζ>1, critically damped if ζ=0 and underdamped if 0<ζ1.

Blurred answer
Students have asked these similar questions
A  solid slab    of    5.15    wt%    agar    gel    at    278    K    is    6.00    mm    thick and contains  a  uniform    concentration    of    urea    of    0.2    kmol/m3. Diffusion    is only     in     the     direction     through     two     parallel  flat  surfaces   6.00     mm     apart.    The     slab     is     suddenly     immersed     in     pure     turbulent     water     so     that     the surface     resistance     can     be     assumed     to     be     negligible;  i.e,     the     convective coefficient    hm is    very    large.    The    diffusivity    of    urea    in    the    agar    is    4.72e-10    m2/s.    a)    Calculate     the    concentration    at     the    midpoint    of     the    slab    and     (b) 1.50     mm     from     the     surface     after     19     h.     c) if   the     thickness     of     the     slab     is    halved,    what    would    be    the    midpoint    concentration    in    19    h.
The answer for the specific molar volume of nitrogen gas is 12.089x10^(-5) m^3/mol.  How was this answer determined?  You need to use the ideal gas law to determine the specific molar volume.  Do not determine the third specific enthalpy.  Also, how is the answer for (H3 specific enthalpy) of nitrogen gas (N2) equals to minus 1.26 KJ/mol????  The answer for the energy balance is minus 2320 KJ/s.
220 20 g. 8 20 22 230 240 250 260 270 280 290 300 310 320 100 110 120 120 130 130 Enthalpy At Saturation (kJ/kg Dry Air) 140 150 160 170 180 190 200 210 Wet-Bulb se Seturation Temperature 80 8- ㄜ 30 40 50 60 70 Dry Bulb temperature (°C) g 80 90 100 110 120 10 10 330 60 340 350 360 370 380 390 400 170 990 00 50 09 Moisture Content (g/kg Dry Air) 30 40 70 60 100
Knowledge Booster
Background pattern image
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Introduction to Chemical Engineering Thermodynami...
Chemical Engineering
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:McGraw-Hill Education
Text book image
Elementary Principles of Chemical Processes, Bind...
Chemical Engineering
ISBN:9781118431221
Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:WILEY
Text book image
Elements of Chemical Reaction Engineering (5th Ed...
Chemical Engineering
ISBN:9780133887518
Author:H. Scott Fogler
Publisher:Prentice Hall
Text book image
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:9781119285915
Author:Seborg
Publisher:WILEY
Text book image
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:9781285061238
Author:Lokensgard, Erik
Publisher:Delmar Cengage Learning
Text book image
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:9780072848236
Author:Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:McGraw-Hill Companies, The