mas985 was kind enough to estimate operating point of my superpump mated with a new 2 speed motor:
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Operating Point
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Pump Speed (RPM)
[/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]3450[/center:26q3pdkz][/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]1725[/center:26q3pdkz][/td:26q3pdkz][/tr:26q3pdkz][tr:26q3pdkz][td:26q3pdkz]
Flow Rate (GPM)
[/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]58[/center:26q3pdkz][/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]29[/center:26q3pdkz][/td:26q3pdkz][/tr:26q3pdkz][tr:26q3pdkz][td:26q3pdkz]
Total Head Loss (ft)
[/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]38[/center:26q3pdkz][/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]9[/center:26q3pdkz][/td:26q3pdkz][/tr:26q3pdkz][tr:26q3pdkz][td:26q3pdkz]
Suction Head Loss (ft)
[/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]7.3[/center:26q3pdkz][/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]1.8[/center:26q3pdkz][/td:26q3pdkz][/tr:26q3pdkz][tr:26q3pdkz][td:26q3pdkz]
Pre-Gauge Head Loss (ft)
[/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]7.9[/center:26q3pdkz][/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]2.0[/center:26q3pdkz][/td:26q3pdkz][/tr:26q3pdkz][tr:26q3pdkz][td:26q3pdkz]
Return Head Loss (ft)
[/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]22.6[/center:26q3pdkz][/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]5.7[/center:26q3pdkz][/td:26q3pdkz][/tr:26q3pdkz][tr:26q3pdkz][td:26q3pdkz]
Total Plumbing Curve
[/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]0.0112[/center:26q3pdkz][/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]0.0112[/center:26q3pdkz][/td:26q3pdkz][/tr:26q3pdkz][tr:26q3pdkz][td:26q3pdkz][/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz][/center:26q3pdkz][/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz][/center:26q3pdkz][/td:26q3pdkz][/tr:26q3pdkz][tr:26q3pdkz][td:26q3pdkz]
Energy Use (watts)
[/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]1212[/center:26q3pdkz][/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]282[/center:26q3pdkz][/td:26q3pdkz][/tr:26q3pdkz][tr:26q3pdkz][td:26q3pdkz]
Energy Factor (Gallons per Watt-Hr)
[/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]2.87[/center:26q3pdkz][/td:26q3pdkz][td:26q3pdkz][center:26q3pdkz]6.17[/center:26q3pdkz][/td:26q3pdkz][/tr:26q3pdkz][/table:26q3pdkz]
i treated myself to white and blue 20-100 GPM flow meter and installed it today. my filter is not freshly coated and my flow was 53 GPM on high speed, which matches mas985's estimate pretty good. but on low speed the flow meter showed only about 16-17 GPM! which is about 30% instead of expected 50% of the high speed flow. i used to filter for 6 hours on high and switched to 12 hours on slow. the water is perfect, but it looks like i'm only doing 3.6 hours of filtering in high speed equivalent. so before i was doing about 0.65 turnover per day, but now on slow i'm only doing 0.4! i maintain my levels so it seems that even 0.4 turnover is enough to keep the pool sparkling! borates probably are helping too.
on recirculate, my flow rates are 66 and 26 on hi/low speed, so low speed is about 40% of high speed flow.
does anyone else have a 2 speed pump with a flow meter? are your numbers similar? i'm a little bummed out not to see 50%!
i treated myself to white and blue 20-100 GPM flow meter and installed it today. my filter is not freshly coated and my flow was 53 GPM on high speed, which matches mas985's estimate pretty good. but on low speed the flow meter showed only about 16-17 GPM! which is about 30% instead of expected 50% of the high speed flow. i used to filter for 6 hours on high and switched to 12 hours on slow. the water is perfect, but it looks like i'm only doing 3.6 hours of filtering in high speed equivalent. so before i was doing about 0.65 turnover per day, but now on slow i'm only doing 0.4! i maintain my levels so it seems that even 0.4 turnover is enough to keep the pool sparkling! borates probably are helping too.
on recirculate, my flow rates are 66 and 26 on hi/low speed, so low speed is about 40% of high speed flow.
does anyone else have a 2 speed pump with a flow meter? are your numbers similar? i'm a little bummed out not to see 50%!