20141016IES_Dual Sprinkler Package_Demand Savings.docx

D1 = kW savings for dual sprinkler package conversion
D2 = Flow rate with standard pivot nozzles (885 gpm)
D3 = Average pump operating pressure (65 psi)
D4 = Average annual operating hours (1,940 hours)
D5 = Average pumping plant efficiency (60% or 0.6)
D6 = Average operating hours at full flow with a dual nozzle package (1,455 hours)
D7 = Reduced flow rate with dual sprinkler nozzles (649 gpm)
D8 = Average operating hours at reduced flow with a dual nozzle package (485 hours)
D9 = factor to average demand savings from the irrigation season over the entire year (5/12)
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