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Thread: How would you model multiple different-size variable speed pumps (VSP)?

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  1. #1
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    Innovyze Employee



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    Mar 2013
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    How would you model multiple different-size variable speed pumps (VSP)?

    There are two variable speed pumps (VSP) in a wastewater lifting station. One is a small VSP, which will be turned on when the flow is small and turned off when the flow is large. The other is a large VSP, which will be turned on when the flow is large and turned off when the flow is small.

    One way to model this situation is to use Rule-Based controls and VSP controls within InfoWater. Rule-based controls will determine a pump is on or off from the system flow, while VSP controls will determine the running VSP's speed when the pump is on.

    Rule-based controls apply only at the very beginning of each EPS step. Note that Rule-based controls do nothing in a Steady State run. In order to accurately simulate how the pump changes speed, the EPS time step should be small.
    Last edited by Shawn Huang; August 7, 2013 at 08:35 AM.

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