challenger center cooling tower

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

ThqPH

TP

CT unit

Cooling Tower Schematic

Outside

Intake

Outside Intake

Inside Intake

Exhaust

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

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

Radial dep vs temp expt 1

Average Velocity Per Cross-Section

Average Cross-Sectional Air Flow

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

Volumetric Flow

How to solve for with formulas and trapezoidal rule

Don’t forget results from expt 1

Volumetric Flow (cu. ft/min)

results

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

Humidity

Tell about relative humidity (data taken)

Absolute humidity being same in and out

RH from psychrometric chart enthalpy

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)

Heat Generated

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

Block Diagram

With values that have been solved for

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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