Selecting the water pump usage point from Curve to achieve maximum efficiency and energy saving.

"Choosing the use point of a water pump from Curve to achieve maximum efficiency and save energy"

Selecting the water pump usage point from Curve

Installation affects performance and energy consumption.

• Overdesigned, requiring a bypass valve.

• Old, inefficient water pump.

• Improper layout, very small, long pipes, etc.

Selecting the right pump for efficient use, energy saving, and extended life of the water pump.

1. Select a pump with a duty point within the maximum efficiency range (BEP).

2. If water usage (load profile) varies significantly, consider a variable speed pump system or a booster pump.

3. Select the appropriate pipe size (flow velocity 1.5-2.5 m/s).

4. Avoid creating air pockets in the suction pipe.

5. Keep suction pipe connections as short as possible with minimal joints.

6. Avoid excessive elbows, reducers, or other fittings.

7. Do not operate the pump far to the right of the BEP, as this will significantly increase the flow rate and NPSH, increasing the risk of cavitation.

** NPSHr (Net Positive Suction Head Required) is the suction performance of the pump, it shows the pressure required to be brought in by the pump at a given flow to avoid cavitation in the liquid.

8. Do not operate the pump too close to the shutoff head. This will result in very low flow rates, which can cause water temperature and pressure to rise, which can be dangerous. This also leads to a lower efficiency level for the pump.

9. The motor should be operated at 60-100% of full rated capacity for maximum efficiency.

10. Operating the pump at less than 50% capacity will significantly reduce motor efficiency.

11. One-third of motors in actual use are oversized and operate at less than 50% of full rated capacity.

12. Operating a pump with a larger motor than required not only lowers efficiency, but also costs more than it should. Furthermore, it also reduces the power factor, leading to higher electricity bills.

For more information

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