Challenger Center Cooling Tower Performed By: Dianah Dugan Alex Saputa.
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Transcript of Challenger Center Cooling Tower Performed By: Dianah Dugan Alex Saputa.
Challenger Center Challenger Center Cooling TowerCooling Tower
Performed By:Performed By:
Dianah DuganDianah Dugan
Alex SaputaAlex Saputa
ContentsContents
Block DiagramBlock Diagram SchematicSchematic Equipment Equipment Data CollectionData Collection Results Results ConclusionConclusion
Block Diagram of Cooling TowerBlock Diagram of Cooling Tower
Air Inlet Air Outlet
T=93 °Fh= 72 kJ/kgP= 1 atmRH= 60%
T= 108 °Fh=P= 1 atmRH=
CT unit
Cooling Tower SchematicCooling Tower Schematic
Outside Intake
Outside Intake
Inside Intake
Exhaust
Schematic of FanSchematic of Fan
EquipmentEquipment
AnemometerAnemometer Yard StickYard Stick LadderLadder Sling PsychrometerSling Psychrometer Psychometric ChartPsychometric Chart Our Mighty Brains and Strong BacksOur Mighty Brains and Strong Backs
Average Velocity Per Cross-SectionAverage Velocity Per Cross-Section
Radial SectionRadial Section Velocity (ft/min)Velocity (ft/min)
1"1" 516516
7"7" 21622162
13"13" 21102110
Total AvgTotal Avg 15961596
Average Radial Air FlowAverage Radial Air Flow
0
500
1000
1500
2000
2500
0 2 4 6 8 10 12 14 16
Radial distance (in.)
Vel
ocit
y of
air
(ft
/min
)
Fan#1
Fan#2
Fan#3
Fan#4
Average Air FlowAverage Air Flow
0
500
1000
1500
2000
2500
3000
0 2 4 6 8 10 12 14 16
Radial Position (in)
Vel
ocit
y of
air
(ft
/min
)
Average Volumetric FlowAverage Volumetric Flow
0.0
500.0
1000.0
1500.0
2000.0
2500.0
3000.0
0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40
Radial position (ft)
Rad
ial
posi
tion
*Vel
ocit
y of
air
(ft
/min
)
Fan #1
Fan #2
Fan #3
Fan #4
Mass Flow RateMass Flow Rate
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
Radial Dependence of TemperatureRadial 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 1.4
Radial position (ft)
Tem
pera
ture
(F
)
Fan#1
Fan#2
Fan#3
Fan#4
Air Intake TemperatureAir 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
Compressor Run TimesCompressor Run Times
ConclusionsConclusions
Temperature will vary based on units Temperature will vary based on units in or out of the shadein or out of the shade
Velocity is the greatest towards the Velocity is the greatest towards the center of the fan bladecenter of the fan blade
Velocity is the least in the center of Velocity is the least in the center of the exhaustthe exhaust
Human error can easily affect the Human error can easily affect the instruments usedinstruments used
Our Questions to YouOur Questions to You
How should we calculate the How should we calculate the volumetric flow with an air velocity volumetric flow with an air velocity that is dependent on radial position?that is dependent on radial position?
Should we assume relative humidity Should we assume relative humidity is the same at intake and exhaust is the same at intake and exhaust (we didn’t get the relative humidity (we didn’t get the relative humidity reading for the exhaust)?reading for the exhaust)?