Problem If pumps are sized to handle peak flow or worst-case conditions, they could operate at substantially less efficient levels for long periods. Oversized pumps in applications like these tend to waste energy, and they require frequent maintenance because they operate far from their best efficiency points. Proposed Solutions Pump downsizing Use variable speed drive: If the system has low static head requirements check the possibility/feasibility of installing variable speed control. Use parallel arrangements Pony pump arrangement (small pump and large pump) :When you have intermittent pump operation, or excessive flow noise, cavitation, and piping vibrations that disappear during heavy demand periods. Use several smaller identical parallel pumps To download a PDF document from the below tip map from this link www.360proactiveengineer.com https://www.linkedin.com/pulse/energy-effeciency-tip-day-oversized-pumps-problem-magdy-aly

1. Pumping system Tips
(over-sizing problem)

2. Oversized Pump Problem

3. Why

4. Wrong selection for optimum size

5. Wrong fitting or reuse for equipments Use 100 M3/hr pump for 50 M3/hr application

6. Over-estimation for future needs

7. Consequences

8. operate at substantially less
efficient levels for long periods

9. waste energy

10. frequent maintenance

11. Proposed solutions

12. Pump downsizing

13. Impeller trimming

14. Use Variable speed drive
if feasible
If the system need low static head

15. Use multiple pump
arrangements
Pony pump arrangment
Identical parallel pumps

16. Proposed Actions

17. Check your Pumping system and find tuning opportunities

18. Make a list of the pumps that working with low performance

19. Adjust Pumps flows to avoid using system bypasses

20. Check the feasibility of installing VSD for suitable significant cases

21. Compare pump down-sizing options when needed

22. 360 Proactive Engineer
www.360Proactiveengineer.com

23. Pumping system Tips
(over-sizing problem)
Oversized Pump Problem
Why
Wrong selection for optimum size
Wrong fitting or reuse for equipments Use 100 M3/hr pump for 50 M3/hr application
Over-estimation for future needs
Consequences
operate at substantially less
efficient levels for long periods
waste energy
frequent maintenance
Proposed solutions
Pump downsizing Impeller trimming
Use Variable speed drive
if feasible
If the system need low static head
Use multiple pump
arrangements
Pony pump arrangment
Identical parallel pumps
Proposed Actions
Check your Pumping system and find tuning opportunities
Make a list of the pumps that working with low performance
Adjust Pumps flows to avoid using system bypasses
Check the feasibility of installing VSD for suitable significant cases
Compare pump down-sizing options when needed
360 Proactive Engineer
www.360Proactiveengineer.com