Specific Energy Map Page

Use this Quick Reference Guide to get acquainted with the Specific Energy Map page.

The Specific Energy Map screen includes digital gauges, pump overviews, and an interactive Specific Energy map.

Interactive Specific Energy Map

The examples below highlight different features of the Specific Energy Map.

Each green dot represents a valid operating point meaning that if the corresponding set of pumps is used, then the speeds associated with that dot are valid for achieving the flow using the corresponding combination of pumps. In other words, all pumps will be in POR if run at this set of speeds.

Light green dots indicate combinations in which one or more pumps is not available because of HOA settings.

Each red dot represents a set of speeds where one or more pumps are operating outside of POR, allowing operators to see which combinations of pumps and speeds should not be used. Yellow dots are points that are outside of POR, but still within the Allowable Operating Range (AOR).

The black dots and lines represents the optimal combinations of pumps and speeds for the pump station. If there are better solutions using unavailable pumps, they are shown with grey dots. The gaps shown with the fine black (or grey) line represent flows where the optimal way to produce the associated flow would be to alternate between the two operating points on either side of the gap.

Constraints

The DPO uses constraints to determine the sandbox–the allowable range of flows based on current system conditions.

Constraints may be defined based on flow, suction pressure, discharge pressure, power, and reservoir levels.

Constraints can be minimums, maximums, or setpoints. The DPO uses the biggest minimum and smallest maximum constraints to compute the sandbox.

The sand-colored rectangle, called the sandbox, represents operational limits within the configured constraints. Clicking the vertical text at the sandbox will navigate to the Controls tab.

Summary Box

The summary box shows various information about potential operating conditions. If you click on any dot on any curve, the Summary Box will show the estimated flows, powers, and speeds associated with that point.

The currently-displayed point is highlighted with a cyan dot.

To compare Current Operating Point with the Recommended Operating Point, clicking the appropriate radio buttons at the bottom of the Summary Box will illustrate those conditions.

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