Thanks Artisi. I had assumed this might be the case. For example there is an assumption, derived probably from two point curves in hydraulic models, that centrifugal pumps for potable water have quadratic head/flow curves. Of course this is not the case, the curve can only be obtained from...
This is a general question as I want to apply the correct policy to all municipal water pumps. Some are 4 MW and above. At 80% speed we are only using 51% of the power, and therefore not doing a huge amount of work with the pump. At this point I would assume some of the VFD losses and motor...
We have been trying to determine the impact using a VFD drive has on the efficiency of large water pumps used by municipalities. Let’s say in a typical 110 kW pump driving a single stage double suction split case centrifugal pump, that we add a VSD.
The fixed speed pump was operating at a BEP of...
