570 PUMPING STATIONS
Fig. 13.14 Pump–pipeline characteristics
- The present maximum flow is 50 l s^1 , with the pump working against
a head of 26.5 m at an efficiency of 60%.
- Two pumps in parallel.Pump characteristics for in-parallel opera-
tions are as follows:
Discharge (l s^1 ) 004080120
Head (m) 50 45 33 019
The total discharge is 73 l s^1 at a head of 36 m. Therefore, the dis-
charge per pump is 73/236.5 l s^1 , and the corresponding efficiency
is 69%. Hence the input power per pump (when in parallel opera-
tion) is 9.810.036536/0.6918.68 kW. Therefore the total power
consumption 2 18.6837.36 kW.
- Two pumps in series.Pump characteristics for in-series operation are
as follows:
