Question 1:
As a graduate engineer you have been assigned to size a cooling tower pump for your first project. Using the information provided, and for the required cooling tower pump, complete the table below with the relevant data.
Q1.1: head
Q1.2: flow
Q1.3: NPSH
Q1.4: Impeller diameter
Q1.5: power
Q1.6: pump selection
Q1.7-0.110: Show your answers by drawing on the sketch below
Q1.7: pipe head loss
Q1.8: water vapor pressure
Q1.9: cooling tower static head
Q1.10: water absolute pressure
Questions 2
The following information is gathered/measured from the site.
- The plant room is in the basement and the cooling tower pump (with 200mm nominal standard steel rough iron pipe on the suction side) draws water out of the cooling tower.
- The cooling tower is installed on the sixth floor of the same building.
- The elevation from the basement to sixth floor is 20m.
- Use the Attachments provided to assist where relevant.
- Access the following online resource through the Reading List (on Blackboard) in relation to the physical properties of water:
o Crittenden, J. C., Montgomery Watson, H., & Wiley, L (2012). MWH's water treatment : principles and design (3rd ed. / ed.). Hoboken, N.J. John Wiley and Sons. (see Appendix C Physical Properties of Water)
- Other information of relevance is shown below.
| Physical location |
Data provided |
| Suction side (of pump) |
1 off qlob valve
|
|
4 off long radius 90°elbows
|
|
1 on flexible connection
|
|
1 on gate valve
|
|
1 off strainer
|
|
15m horizontal 200mm pipe run
|
|
|
|
| Discharge side (of pump) |
1 off gate valves
|
|
6 off long radius 90°elbows
|
|
1 T connection
|
|
1 oft flexible connection
|
|
1 on glob valve
|
|
1 off strainer
|
|
20m horizontal 200mm pipe run
|
|
|
|
Question
Q2.1: The cooling tower drawing showing its physical dimension
Q2.2: The selected cooling tower data sheet shows technical data
Q2.3: The selected chiller's condenser data sheet showing condenser water flow and pressure drop
Q2.4: Moody diagram with point showing selection
Q2.5: Steel pipe table with both the Suction Side pipe and the Discharge side pipes shown
Q2.6: Sketch of the system (pump, pipes, cooling towers, other hardware)
Q2.7: Identify the relevant physical properties of water for each of the following:
- Cooling Tower
- Pump Suction Side
- Pump Discharge side
Q2.8: Identify the relevant pump curve