The Grand Composite Curve
ChBE 404 Chemical Engineering Design
24 January 2017
ChBE 404 Chemical Engineering Design
The Grand Composite Curve
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Final Exam
Solution
1. A rubber membrane with the shape indicated in the figure will be used to
regulate the concentration of CO2 in a aqueous solution. The concentration of
CO2in the aqueous phase is 0.5 % molar. The air will flow slowly to maintain
CO2
PROBLEM 1
A polyimide membrane is being considerate for separation of CO2 from air. The
diffusion coefficients for CO2 and N2 through the polymer are 0.2x10-9 and 12 x10-9
cm2/s, respectively. The solubility coefficients (inverse of Henrys law constants)
Final Exam
Solution
1. A rubber membrane with the shape indicated in the figure will be used to
regulate the concentration of CO2 in a aqueous solution. The concentration of
CO2in the aqueous phase is 0.5 % molar. The air will flow slowly to maintain
CO2
Exam 1
Proposed solution
Consider two-dimensional transient heat transfer in an Lshaped solid bar that is initially at a uniform temperature of
140C and whose cross section is given in the figure. The
thermal conductivity and diffusivity of the body are k
Quiz No.1 ChBE402 (Spring 2014), Team: _01/29/2014
Student 1:_ Student 2: _
Student 3:_ Student 4:_
1. Select all the units that CAN NOT BE USED to represent heat rates:
a)
kW-h
b)
RT
c)
kW/h
d)
J/s
e)
Btu/hr
f)
kW
g)
kg-m2/s3
Kilowatt hour
Ton of
refrige
Quiz No.2 ChBE402 (Spring 2014), Team: _02/12/2014
Student 1:_ Student 2: _
Student 3:_ Student 4:_
2. The general equation of heat transfer of the form:
k T V C p T To Q Cv T To
t
Can be simplified to three different forms.
For each case
I)
Specify und
A List of Laplace and Inverse Laplace Transforms Related to Fractional Order Calculus
1
A List of Laplace and Inverse Laplace Transforms Related to
Fractional Order Calculus
YangQuan Chen , Ivo Petras and Blas Vinagre
Electrical and Computer Engineering
U
Midterm exam
Dz/3
Dz/3
W
Dz
L/3
z
y
x
2L/3
A hot surface at 100 C is to be cooled by attaching 6-in-long
aluminum fin (k=237 W/m-K) to it. The temperature of the
surrounding medium is 30C, and the heat transfer coefficient on
the surface is 35 W/m2-K. Det
Refresher
Math needed for CHBE 402
Second order differential equations
d2y
dy
a ( x ) 2 + b( x ) + c ( x ) y = 0
dx
dx
Solution:
y = A F (x ) + B G(x )
Constant coefficient
Homogeneous second order differential equation
d2y
dy
a 2 + b + cy = 0
dx
dx
y = A
Homework 4 Solution
ChBE 404 Chemical Engineering Design
Spring 2017
Due Tueday, February 14 at 10:50 am
1
Problem 1 Residue Curve Map and the Feasible Region
(40 points) A multicomponent stream to be separated consists of 32 kmol/h of component A,
94 kmo
Column Sequencing Considerations
ChBE 404 Chemical Engineering Design
31 January 2017
ChBE 404 Chemical Engineering Design
Column Sequencing Considerations
Sequencing of Ordinary Distillation Columns
Use a sequence of ordinary distillation (OD) columns to
The Grand Composite Curve
ChBE 404 Chemical Engineering Design
31 January 2017
ChBE 404 Chemical Engineering Design
The Grand Composite Curve
Placement of Column
Seider,Seader,and Lewin(2004)
ChBE 404 Spring 2013
The Grand Composite Curve
Placement of Co
Homework 3 Solution
ChBE 404 Chemical Engineering Design
Spring 2017
February 2, 2017
1
Problem 1 The Intercooling/Interheating Diagram
(50 pts) In the class notes for January 26, we present the following diagram based on a similar
graph from the textbook
Homework 1 Solution
ChBE 404 Chemical Engineering Design
19 January 2017
1
1. (50 points) This problem involves producing ice by freezing water with evaporating ammonia
through the heat exchanger unit illustrated below.
water (liquid)
stream 1
NH3 (vapor)
Homework 2 Solution
ChBE 404 Chemical Engineering Design
26 January 2017
1
1. (15 points) Consider the network of heat exchangers with Tmin = 10 F.
Redesign this network for the minimum utiltilies. Your design must use exactly the minimum
number of exchan
Distillation Example:
Intercooling and Interheating
ChBE 404 Chemical Engineering Design
26 January 2017
ChBE 404 Chemical Engineering Design
Distillation Example: Intercooling and Interheating
Hydrodealkylation of Toluene
ChBE Design Fundamentals
Distill
QUIZ 5
Solution
m2/s
1/m2
Diffusion at the inner part of the boundary equals convection in the external phase
n
C(b,)i
C(a)i
(a)
n = normal vector
Dij(a) = diffusivity of component i within the fluid j hold by phase a
hm,i = mass transfer coefficient of c