Challenger Center Cooling Tower Enev/Ench 435 September 23, 2008 Performed By: Dianah Dugan Alex...
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Challenger Center Cooling Tower Enev/Ench 435 September 23, 2008 Performed By: Dianah Dugan Alex Saputa
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Transcript of Challenger Center Cooling Tower Enev/Ench 435 September 23, 2008 Performed By: Dianah Dugan Alex...
Challenger Center Cooling Tower
Enev/Ench 435
September 23, 2008
Performed By:
Dianah Dugan
Alex Saputa
Contents
Block Diagram Schematic Equipment Data Collection Results Conclusion
Block Diagram of Cooling Tower
Air Inlet
Air Outlet
CT unit
m
h
T
i
i
ˆ
m
h
T
o
o
ˆ
P= 1 atm
W= 0
Chilled WS
Chilled WR
H <0CW
H >0Air
Cooling Tower Schematic from Side View
Outside
Intake
Outside Intake
Inside Intake
Exhaust A Exhaust B
Outside Inlet B Outside Inlet A
Inner Inlet B Inner Inlet A
Schematic of Exhaust Fan
0.22 ft
0.72 ft
1.22 ft
*Distances measured from center of fan
Equipment
Anemometer Yard Stick Ladder Sling Psychrometer Psychrometric Chart
Radial Dependence of Temperature for Week 1
99
101
103
105
107
109
111
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4Radial Position (ft)
Tem
pera
ture
(F
)
Fan #1Fan #2Fan #3Fan #4
Fan #4
Fan #3
Fan #2
Fan #1
Radial Dependence of Temperature for Week 1
Post the velocities of the first week on the spread sheet plz <3
Radial Dependence of Temperature for Week 2
99
101
103
105
107
109
111
0 0.2 0.4 0.6 0.8 1 1.2 1.4
Radial position (ft.)
Te
mp
era
ture
(F
)
Fan#1
Fan#2
Fan#3
Fan#4
Fan #1
Fan #3
Fan #4
Fan #2
Radial Dependence of Temperature for Week 2
80
85
90
95
100
105
110
115
120
0.22 0.72 1.22
Radial Distance (ft)
Tem
per
atu
re (
F)
Fan #1
Fan #2
Fan #3
Fan #4
Average Air Velocity for Week 1
0
500
1000
1500
2000
2500
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
Radial Position (ft)
Ve
loc
ity
(ft
/min
)
Fan #1
Fan #2
Fan #3
Fan #4
Fan #4
Fan #3
Fan #2
Fan #1
Average Air Velocity for Week 1
Post the velocities of the first week on the spread sheet plz <3
Average Air Velocityfor Week 2
0
500
1000
1500
2000
2500
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
Radial distance (ft)
Ve
loc
ity
of
air
(ft
/min
)
Fan#1
Fan#2
Fan#3
Fan#4
Fan #2
Fan #2
Fan #2
Fan #2
Average Air Velocityfor Week 2
-2000
-1500
-1000
-500
0
500
1000
1500
2000
2500
3000
3500
0.22 0.72 1.22
Radial Distance (ft)
Exh
aust
Vel
oci
ty (
m/s
2 )
Fan #1
Fan #2
Fan #3
Fan #4
Calculating the Cross-Sectional Area
r1 r2 r3 r4R1
R2
R3
R4
r1= 0.22 ft
r2= 0.72 ft
r3= 1.22 ft
r4= 1.30 ft
A1= π*(R2² - R1²)
A2= π*(R3² - R2²)
A3= π*(R4² - R3²)
Formulas To Solve:
Volumetric Flow Rate = cross-sectional area* measured velocity
Mass Flow Rate = volumetric flow rate * density
Heat = mass flow rate * change in enthalpy
Density is found by taking the inverse of Humid Volume, found on Psychrometric chart
*Vm
vAV *
)(* inletexhaust hhmQ
Comparative Volumetric Flow for Each Exhaust Fan
0
800
1600
2400
3200
4000
4800
5600
6400
7200
0.22 0.72 1.22Radial Position (ft)
Vo
lum
etr
ic F
low
Ra
te (
ft^
3/m
in)
Fan 1
Fan 2
Fan 3
Fan 4
Comparative Volumetric Flow for Each Exhaust Fan
-700100900
17002500330041004900
57006500730081008900
0.22 0.72 1.22Radial Position (ft)
Vo
lum
etri
c F
low
Rat
e (f
t^3/
min
)
Fan 1
Fan 2
Fan 3
Fan 4
Mass Flow Rate Per Fan
729
772
727
747
690
700
710
720
730
740
750
760
770
780
1 2 3 4Fan #
Mas
s F
low
Rat
e (l
b/m
in)
Mass Flow Rate Per Fan
Fan #1, 729 Fan #2, 772 Fan #3, 727 Fan #4, 747
0
100
200
300
400
500
600
700
800
900
1000
Mas
s F
low
Rat
e (l
b/m
in)
Calculating Enthalpy from Psychrometric Chart
Enthalpy for Inlet and Exhaust Fans
31 31 31 30
79 78 76 75
0
10
20
30
40
50
60
70
80
90
1 2 3 4Fan #
En
thal
py
(Btu
/lb
)
Inlet
Exhaust
Heat Generated
116657
271078
183596
266618
0
50000
100000
150000
200000
250000
300000
1 2 3 4
Fan #
Hea
t (B
tu/h
r)
Heat Generated
Fan #1, 116657
Fan #2, 271078
Fan #3, 183596
Fan #4, 266618
0
50000
100000
150000
200000
250000
300000
Hea
t (B
TU
/hr)
Heat Generated
Fan #1, 10
Fan #2, 23
Fan #3, 15
Fan #4, 22
0
5
10
15
20
25
Hea
t (T
on
s)
Change to bar graph***
Date A B
8/20/2008 Starts 1915 1915
Running hours 3039 2887
8/21/2008 Starts 1917 1917
Running hours 3060 2890
8/22/2008 Starts 1919 1919
Running hours 3081 2891
8/25/2008 Starts 1923 1923
Running hours 3125 2920
Starts per Unit
1923191919171915
0
500
1000
1500
2000
2500
8/20/08 8/21/08 8/22/08 8/23/08 8/24/08 8/25/08
Date
Rec
ord
ed S
tart
s
A
B
Run Time per Unit
2750
2800
2850
2900
2950
3000
3050
3100
3150
8/20/08 8/21/08 8/22/08 8/23/08 8/24/08 8/25/08
Date
Rec
ord
ed R
un
nin
g H
ou
rs
A
B
Conclusions
Velocity is the lowest near the center of the exhaust fan
Unit A carries a load of approximately 70 tons (+- 6 tons)
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