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CHE426: Problem set #4
1. An engineer has designed a system in which a positive-displacement pump is used to
pump water from an atmosphere tank into a pressurized tank operating at 150 psig. A control
valve is installed between the pump
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CHE426: Problem set #3
1. An isothermal, first-order, irreversible reaction A B with rate constant k takes place in the
liquid phase in a constant-volume reactor. Due to imperfect mixing, the reactor system can be
modeled as a two-tank
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CHE426: Problem set #3
(Need to show all the works. Except for plot or numerical calculation, Matlab solutions
are not acceptable)
1. An isothermal, first-order, irreversible reaction A B with rate constant k takes place in the
liquid p
CHE 426 (Winter 2011)
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Set #1
Note: Your answers must be correct to 3 significant figures and have the appropriate units.
Matlab solutions are not acceptable
1. = + +
A = 0.8
B = 0.1715
C = 0.9716
2. Given Y(s) = ,determine y(t) y(t) = [
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CHE426: Problem set #2 (Matlab solutions are not acceptable)
1. Solve the following equations by using Laplace transforms1.
(a) + + x = 1
(b) + 2 + x = 1
(c) + 3 + x = 1
x(0) = x(0) = 0 (Note: x = )
x(0) = x(0) = 0
x(0) = x(0) = 0
Use M
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CHE426: Problem set #2
1. Solve the following equations by using Laplace transforms1.
(a) + + x = 1
(b) + 2 + x = 1
(c) + 3 + x = 1
x(0) = x(0) = 0 (Note: x = )
x(0) = x(0) = 0
x(0) = x(0) = 0
Use Matlab to plot the behavior of these so
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CHE426: Problem set #51
1. A thermometer having a time constant of 0.2 min is placed in a temperature bath, and after
the thermometer comes to equilibrium with the bath, the temperature of the bath is increased
linearly with time at a r
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CHE426: Problem set #61
1. A step change of magnitude 4 is introduced into a system having the transfer function
=
A. Determine (a) Percent overshoot, (b) Rise time, (c) Maximum value of Y(t), (d)
Ultimate value of Y(t), and (e) Period
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CHE426: Problem set #71
1. The temperature of a CSTR is controlled by an electronic (4 to 20 mA) feedback control
system containing (1) a 50 to 300oF temperature transmitter, (2) a PI controller with integral
time set at 4 minutes and p
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CHE426: Problem set #10
1. Liquid (SG = 1) is pumped from a tank at atmosphere pressure through a heat exchanger
and a control valve with linear trim into a process vessel held at 100 psig pressure. The
system is designed for a maximum
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CHE426: Problem set #9
1. A circulating chilled-water system is used to cool an oil stream from 90 to 70 oF in a tubein-shell heat exchanger. The temperature of the chilled water entering the process heat
exchanger is maintained constan
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CHE426: Problem set #4
1. An engineer has designed a system in which a positive-displacement pump is used to
pump water from an atmosphere tank into a pressurized tank operating at 150 psig. A control
valve is installed between the pump
CHE 426
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LAST NAME, FIRST
Set #1
Note: Your answers must be correct to 3 significant figures and have the appropriate units.
Matlab solutions are not acceptable
1. = + +
Determine A, B, C, r1, and r2.
2. Given Y(s) = ,determine y(t)
3.
A tank containing
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CHE426: Problem set #51
1. A thermometer having a time constant of 0.2 min is placed in a temperature bath, and after
the thermometer comes to equilibrium with the bath, the temperature of the bath is increased
linearly with time at a r
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Last Name, First
CHE426: Problem set #8
1. Determine the open loop response of three ideal CSTRs in series when the inlet
concentration of A, CA0, changes from 0.8 to 1.8 kmol/m 3. The reaction is first order with
reaction rate constant k = 0.5 s-1. The