1. Challenger Center Cooling Tower Performed By: Dianah Dugan Alex Saputa

2. Contents  Block Diagram  Schematic  Equipment  Data Collection  Results  Conclusion

3. Block Diagram of Cooling Tower Air Inlet Air Outlet T=93 °F h= 72 kJ/kg P= 1 atm RH= 60% T= 108 °F h= P= 1 atm RH= CT unit

4. Cooling Tower Schematic Outside Intake Inside Intake Exhaust

5. Schematic of Fan

6. Equipment  Anemometer  Yard Stick  Ladder  Sling Psychrometer  Psychometric Chart  Our Mighty Brains and Strong Backs

7. Average Velocity Per Cross-Section Radial Section Velocity (ft/min) 1"516 7"2162 13"2110 Total Avg 1596

8. Average Radial Air Flow

9. Average Air Flow

10. Average Volumetric Flow

11. Mass Flow Rate Radial Section (in) Cross-Sectional Area (ft²) Density (lbm/ft³) Avg Velocity (ft/min) Mass Flow Rate (lbm/min) 10.150.06995165.4 71.620.06992162222.1 134.670.06992110449.9

12. Radial Dependence of Temperature

13. Air Intake Temperature Intake Temp ( ° F) InsideOutside Fan#194.595.7 Fan#293.695.3 Fan#391.293.1 Fan#490.190.5 Average92.493.7

14. Compressor Run Times

15. Conclusions  Temperature will vary based on units in or out of the shade  Velocity is the greatest towards the center of the fan blade  Velocity is the least in the center of the exhaust  Human error can easily affect the instruments used

16. Our Questions to You  How should we calculate the volumetric flow with an air velocity that is dependent on radial position?  Should we assume relative humidity is the same at intake and exhaust (we didn’t get the relative humidity reading for the exhaust)?