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)?