+1(251)732-3555 Support@tutorsgallery.com
Select Page

Follow the file attached below and answer all parts a through f. This is a project for Process Dynamics and Controls course. I need someone who is familiar to Simulink simulation. Also, the question on document file threat I upload it
test_4.doc

Unformatted Attachment Preview

Never use plagiarized sources. Get Your Original Essay on
I need someone who is chemical engineering and perfect in simulink simulation
Hire Professionals Just from \$11/Page

TEST 4
The process shown below mixes three streams and heats them to a desired temperature and
composition. The figure shows the steady state information.
?
?
m2 ? 250 lbm / h
m1 ? 150 lbm / h
x1 ? 0.9
1
2
T1 ? 50 o F
x2 ? 0.1
T2 ? 60 o F
T4 ? 104.2 o F
x4 ? 0. 2667
3
x3 ? 0.4
T3 ? 56. 25 o F
4
5
T5 ? 200 o F
?
m5 ? 200 lbm / h
Note; All time units are minutes, NOT h
In the first tank two streams are mixed, and from there the resulting stream mixes in a second
tank with another hot stream resulting in a final product stream.
The first and second streams are composed of water and substance A; the mass fraction
of the substance is given by x. Stream 5 is pure water. The diameter of the first tank is 2 ft, and
its total height is 20 ft; the steady state liquid level in this tank is 7.2 ft. The second tank is
always full (stream 4 flows by overflow), and its volume is 50 ft3. The pressure above the liquid
level in the first tank is maintained at 2 atm, and the pressure in the second tank is at 1 atm.
For simplicity, assume that the density and heat capacity of every stream is constant and
that of pure water. That is, the concentration of substance A does not affect them. The density
of water is 62.4 lbm / ft 3 , and the heat capacity is 1 Btu / lbm ? oF .
The flow of stream 3 through the valve is given by,
?
m 3 ? 94.752 P1 – P2
where P1 is the upstream (inlet) pressure from the valve and P2 is the downstream (exit)
pressure. Note that P1 depends on the pressure above the liquid level, and on the pressure
generated by the liquid level itself (hydraulic pressure).
The inputs or disturbance to this process (variables that could change and affect the
process) are the flow rate, composition, and temperature of streams 1, 2, and 5. The outputs
(variables that would change due to disturbances) are the flow rate, composition, and
temperature of streams 3, and 4, and the level in the first tank.
a) Develop the model of this process to show how the inputs affect the outputs
c) Graph the response of the composition and temperature of stream 4, and the level in
the first tank when the flow of stream 1 changes to 160 lbm/min
d) Graph the response of the composition and temperature of stream 4, and the level in
the first tank when the temperature of stream 2 changes to 40 oF
e) Graph the response of the composition and temperature of stream 4, and the level in
the first tank when the mass fraction of stream 2 changes to 0.3
f) As we mentioned, for simplicity we assume that the density and heat capacity of the
streams are not functions of the composition. If we were to remove this assumption,
that is, if Cp = f1(x) and density = f2(x), how would this affect your model/simulation.