Variable frequency drive: The key to greater irrigation efficiency? | Infrastructure news

SP submersible pumps are often used in irrigation applications, and are the perfect choice in areas prone to flooding which would otherwise damage beyond repair dry-installed pumps. Deep-well submersible pumps are most often multi-stage pump types.

Besides generating a static pressure for the application, they have to generate an additional pressure in order to lift the water from the aquifer. This means pump inlet pressure can vary significantly.

In addition to a correctly sized SP pump and motor, using a variable frequency drive (VFD) and adding monitoring to the system achieves energy efficient operation.

This article focuses on how the correct use of a VFD can improve energy efficiency, help safeguard water resources, and ultimately save on costs.

Ensuring high irrigation uniformity

One of the first lessons you learn when working with efficient irrigation is the importance of high irrigation uniformity. Meeting three parameters is essential for achieving high uniformity using sprinkler irrigation (see figure 1).

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