CHE 3OI3
Rate Onerations I
rafi zoro
Homework 7
Due: Friday, October 8,2010
+
1
L
problems,6 points each,24 points totai.
Water at 320 K and I bar flows with a velocity of 1.0 m/s over a flat plate I.0 m long and
0.5 m wide that has a uniform surface temp
HW#7-Problem 2a
Problem 2b
Properties
V, m/s
Zukauskas Correlation
C
n
m
Prs
Re
Nu
h, W/m2.K
q, W/m
Air
2.60E-01
3.70E-01
6.00E-01
7.04E-01
2.99E+03
2.78E+01
7.49E+01
7.06E+01
Water
2.60E-01
3.70E-01
6.00E-01
3.56E+00
6.86E+04
4.02E+02
2.51E+04
2.37E+04
P
Problem 3.38
Part b
Tc,K
Redlich/Kwong
Zc
369.8
Pc,K
42.48
Propane at 50 C
0.08664
0
0.42748
1
0.33
6.0400631
0.0400511
For vapor
0.7503141
Operatpr
0.7503142
Vv, cm3/mol
1174.7352
T,K
P,bar
Tr
Pr
323.15
17.16
0.8738507301
0.4039548023
q
Z
Z ( Z + )
1+ Z
HW #5
Diameter inside,in
1.049
T3, Degree F
110
Diameter outside, in
1.315
T ,1 , Degree F
300
0.125
T ,3, Degree F
90
Thickness, in
R pipe convective, hr ft2 F/Btu
0.00103
2
R pipe conductive,hr ft F/Btu
0.00364
R insulation convective, hr ft2 F/Btu
0.76
HW#7-Problem 2a
Problem 2b
Properties
V, m/s
Zukauskas Correlation
C
n
m
Prs
Re
Nu
h, W/m2.K
q, W/m
Air
2.60E-01
3.70E-01
6.00E-01
7.04E-01
2.99E+03
2.78E+01
7.49E+01
7.06E+01
Water
2.60E-01
3.70E-01
6.00E-01
3.56E+00
6.86E+04
4.02E+02
2.51E+04
2.37E+04
P