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fixed Flow Pumps


Why a ‘Constant Power’ Pump delivers constant flow and can not do as a VSP? Let me example:

A ‘Constant Power’ pump is defined in the attached network. The pump can deliver 3984 gpm, when option ‘Is Variable Speed Pump’ is ‘False’. But after setting ‘True’ and ‘Flow (Target)’= 1200 for ‘Fixed Flow’ and calculating it, it shows that the pump still delivers 3984 as flow. Why is not decreased to 1200 gpm?

If ‘Pump Definition’ changes to ‘3Point’ (which is a 3 Point type), you will see that the pump delivers 1200 gpm.


Fixed Flow Pump.rar
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