20141016IES_Dual Sprinkler Package_Usage Savings.docx

E1 = annual kWh savings for a dual sprinkler package conversion
E2 = Flow rate with standard pivot nozzles (885 gpm)
E3 = Average pump operating pressure (65 psi)
E4 = Average annual operating hours (1,940 hours)
E5 = Average pumping plant efficiency (60% or 0.6)
E6 = Average operating hours at full flow with a dual nozzle package (1,455 hours)
E7 = Reduced flow rate with dual sprinkler nozzles (649 gpm)
E8 = Average operating hours at reduced flow with a dual nozzle package (485 hours)
Equation Constants
Conversion factor from psi to feet of head = 2.31
Conversion factor from hp to kW = 0.746
Units conversion factor for water horsepower calculation = 3,960