Challenger Center Cooling Tower
description
Transcript of Challenger Center Cooling Tower
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Challenger Center Cooling Tower
Enev/Ench 435
September 23, 2008
Performed By:
Dianah Dugan
Alex Saputa
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Contents
Block Diagram Schematic Equipment Data Collection Results Conclusion
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Block Diagram of Cooling Tower
Air Inlet Air Outlet
ThqPH
TP
CT unit
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Cooling Tower Schematic
Outside
Intake
Outside Intake
Inside Intake
Exhaust
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Schematic of Exhaust Fan
0.22 ft
0.72 ft
1.22 ft
*Distances measured from center of fan
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Equipment
Anemometer Yard Stick Ladder Sling Psychrometer Psychrometric Chart
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Radial Dependence of Temperature
98
99
100
101
102
103
104
105
106
107
108
0 0.2 0.4 0.6 0.8 1 1.2 1.4Radial position (ft.)
Tem
per
atu
re (
F)
Fan#1
Fan#2
Fan#3
Fan#4
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Radial dep vs temp expt 1
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Average Velocity Per Cross-Section
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Average Cross-Sectional Air Flow
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Average Volumetric Flow
0
500
1000
1500
2000
2500
3000
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
Radial position (ft)
Rad
ial p
osit
ion*
Vel
ocit
y of
air
(ft
/min
)
Fan #1
Fan #2
Fan #3
Fan #4
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Volumetric Flow
How to solve for with formulas and trapezoidal rule
Don’t forget results from expt 1
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Volumetric Flow (cu. ft/min)
results
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Dry Bulb Air Intake Temperature
Intake Temp (°F) Inside Outside
Fan#1 94.5 95.7
Fan#2 93.6 95.3
Fan#3 91.2 93.1
Fan#4 90.1 90.5
Average 92.4 93.7
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Humidity
Tell about relative humidity (data taken)
Absolute humidity being same in and out
RH from psychrometric chart enthalpy
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Mass Flow Rate *check density at exit temp
Radial Section(in)
Cross-Sectional Area (ft²)
Density (lbm/ft³)
Avg Velocity (ft/min)
Mass Flow Rate(lbm/min)
1 0.15 0.0699 516 5.4
7 1.62 0.0699 2162 222.1
13 4.67 0.0699 2110 449.9
Mf = (density)*(area)*(velocity)
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Heat Generated
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Compressor Run Times
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
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Block Diagram
With values that have been solved for
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Conclusions
Temperature is highest at the center of the fan and lowest surrounding the edges
Velocity is the least in the center of the exhaust
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