I'm trying to develop the control strategy for a booster pumping sytem. There are 4 booster pumps three operating and one standby, each pump operates at 130 TDH at 3500 gpm. the maximum flow rate for the system would be 10500 gpm. The pumps are controled by a variable frequency drives. The system includes a pressure transducer and a magnetic flow meter. Can someone explain to me the sequence of operation of how pumps come online and offline. Does the system have to maintain a constant pressure where the transducer is located. Does the pressure at my demand point vary as flow varies? Also what happens during periods of low demand, maybe when one pump operates at min. speed?
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