Answer
Introduction
In this assignment, we have to design a pump to pump a fluid, from the given parameters. The pump delivers the fluid from a sump to the cooling tower. The cooling tower is 40 feet high from the ground. The sump is 2.5 feet high from the ground. The sump has a heat exchanger located on the top. The heat exchanger keeps the fluid hot at a temperature of 140 degrees F. Hence, the fluid that pump has to deliver is hot. Considering these given parameters and pump design principles, the calculation and designing of the pump has been discussed in this report.
Design Question
In this task, a pump has to be designed which has following criteria:
1. The water in the pump will have a temperature of 140 degrees F.
2. The desired minimum flow rate of the water in pump would be 200 gal/min.
The pump delivers the liquid from a sump, which has a heat exchanger on its top, to a cooling tower. The given data are:
Formula Used
We know that:
Calculations
Now, we have:
Here, the symbols stand for:
Here, the diameter has been assumed as 1 foot.
Now, for volume, we have:
The weight in the pump can be calculated as:
Now, for the pressure, we have:
How,
The lengths of the pipe would be as follows:
1. The length of the pipe from sump to ground: 2.5 ft.
2. The pipe from sump to ground point to point where pipe for cooling tower will be attach will be of length 10 ft.
3. The length of the pipe from ground point to top of the cooling tower will be of length 42 ft.
4. The length of the pipe from top of the cooling tower to carry the liquid to the inlet point will be of 10 ft.
The pump can be located at the centre of the cooling tower and the heat exchanger, which would be most efficient and make the pump accessible to both the pipes of tower, with minimum effort required to make the liquid travel unnecessary distances. Both the pipes, that is, from sump and to the cooling tower, can be connect to the pump water inlet and outlet ports, respectively. The L shaped fittings will have to be used for the connections done at ground and top points. The ports to the pump can be connected directly. The valves should be installed at the both ends of the pump, that is, at inlet and outlet. The valve should also be installed at sump outlet and cooling tower inlet points, for better control over liquid flow.
Conclusion
In this report, the pump has been designed and all its expects has been explained. The design has been successful and parameters has been mentioned. The calculations for the design has been shown.
References
Fischer, S. K., & Rice, C. K. (1983). Oak Ridge heat-pump models. I. A steady-state computer design model for air-to-air heat pumps (No. ORNL/CON-80/R1). Oak Ridge National Lab., TN (USA).
Kavanaugh, S. P. (2000). Ground Thermal Properties—Methods and Impact on Ground-Source Heat Pump Design.
Erhard, S., Giesen, A., Karszewski, M., Rupp, T., Stewen, C., Johannsen, I., & Contag, K. (1999, January). Novel pump design of Yb: YAG thin disc laser for operation at room temperature with improved efficiency. In Advanced Solid State Lasers (p. MC3). Optical Society of America.
