- Oct 3, 2011
- 20
My goal is to run my pool at the lowest RPM possible using a pentair VS pump.
I have tried to figure-out the various equations and performance curves, but it feels like there are too many unknowns.
So, I went a different route. Using Pentair's web site for a 12k pool:
@1200 rpm, it cites 3.1 turnovers in 18 hours => a turnover every 5.8 hours ... ~35gal/min
@2400 rpm, it cites 6.2 turnovers in 18 hours => a turnover every 2.9 hours ... ~70gal/min
I want 3 turns per day, knowing I will run at 2400 for 3 hrs for the cleaner = so that is ~1 turn over
the other 2 turns can be achieved at 1200 for 12 hours.
I expect this to be a super best-case scenario ... I know I have to run at higher RPMs ... but how much?
I have 2 exit pipes of 2" from the equipment: one to the pool returns and the other to a set of bubblers on a tanning ledge.
At 1200, the bubbler spike is about 3" above the pool surface and the bubblers are 6" below the surface.
So, I know there is flow. Yet, the pressure reading in the DE filter barely rises.
My DE filter loss curve shows 35gal/min equates to 1psi of loss.
Should I run various RPMs, record the filter pressure, use the filter's loss-to-GPM graph, and derive the RPM-to-GPM for my system?
I have tried to figure-out the various equations and performance curves, but it feels like there are too many unknowns.
So, I went a different route. Using Pentair's web site for a 12k pool:
@1200 rpm, it cites 3.1 turnovers in 18 hours => a turnover every 5.8 hours ... ~35gal/min
@2400 rpm, it cites 6.2 turnovers in 18 hours => a turnover every 2.9 hours ... ~70gal/min
I want 3 turns per day, knowing I will run at 2400 for 3 hrs for the cleaner = so that is ~1 turn over
the other 2 turns can be achieved at 1200 for 12 hours.
I expect this to be a super best-case scenario ... I know I have to run at higher RPMs ... but how much?
I have 2 exit pipes of 2" from the equipment: one to the pool returns and the other to a set of bubblers on a tanning ledge.
At 1200, the bubbler spike is about 3" above the pool surface and the bubblers are 6" below the surface.
So, I know there is flow. Yet, the pressure reading in the DE filter barely rises.
My DE filter loss curve shows 35gal/min equates to 1psi of loss.
Should I run various RPMs, record the filter pressure, use the filter's loss-to-GPM graph, and derive the RPM-to-GPM for my system?