EERETURN "fl-HS SHEET WITH YOUR EXAM ROOKIE
CPDC Chemical Process Dynamics and Control I Fall 2013 Student Name:
Instructor: Mattheos Koffas . ,
TA: Matt Titus Dtnagh Chev "M A
«9 rll‘he exam is closed book and notes. Only the examination blue b
A jacketed vessel is used to cool a process stream as shown in the Figure below. The
following information is available:
(i) The volume of liquid in the tank V and the volume of coolant in the jacket VJ
remain constant. Volumetric f
A block diagram of a closed-loop system is shown in the Figure below.
(a) Derive a closed-loop transfer function for disturbance changes Y(s)/D(s).
(b) For the following transfer functions, what values of Kc will result in a stable
A chemostat is a continuous stirred tank bioreactor that can carry out fermentation of a
bacterial, fungal or plant cell culture. Its dynamic behavior can be described by the
X and S are the cell and substrate co
Consider the following transfer function:
(a) From the pole location, determine whether the output will be oscillatory and
whether the process will converge or diverge.
(b) Plot the response of the output to a unit step input (use MA
EIRETURN THIS SHEET WITH YOUR EXAM BOOKII E
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Chemical Process Dynamics and Control I Fall 2011
iir‘structor: Mattheos Koffas
' o The exam is closed book and notes. Only a crib and the examination blue b
Chemical Process Dynamics &’ Control
19 February 2010
Make sure there are six (6) questions and two (2) pages of appendices in your exam packet.
This is a closed-book exam. The only materials allowed are one double-sided, hand—written
t‘ HRJETURN THIS SHEET WITH YOUR EXAM BOOKH
Ahemieal Process Dynamics and Control I Fall 2013 Student Name:
Instructor: Mattheos Koffas _
Teaching Assistant: Matt Titus 0‘ "(5“ C '4. “(A-
e The exam is closed book and notes. Only a crib and
ﬂ HRETURN THIS SHEET WITH YOUR EXAM BOOKIE
CPDC Chemical Process Dynamics and Control I Fall 2013
Instructor: Mattheos Koffas
o The exam is closed book.
0 Answer all questions. Write legibly, justify your answers, and
A biochemical rea
It is desired to reduce the concentration of CO2 in the flue gas from a coal-fired power
plant, in order to reduce greenhouse emissions. The effluent flue gas is sent to an
ammonia scrubber, where the most of the CO2 is absorbed in a
A block diagram for internal model control, a control technique that we will see again in
the near future, is shown in the Figure below. Transfer function denotes the process
model while Gp denotes the actual process transfer functio
A 40 mole % ethanol-water saturated liquid is processedin a system consisting of two unit
operations. The feed is first fed into a flash chamber. The vapor stream exiting from the
flash chamber is then sent to a partial
For each of the following functions X(s), what can you say about x(t) () without solving
for x(t)? In other words, what are x(0) and x( )? Is x(t) converging or diverging? Is x9t)
smooth or oscillatory?
Show that the direct synthesis method for the following process, assuming a desired first
order response, yields a PID controller
Find the PID tuning parameters if a closed-loop time constant of 5 minutes is desired.