This PP is annotated (with a pointer) and narrated (using PP versions 2007 and later). The speaker icon on each slide indicates this capability. The narration and annotation functions on your computer must be turned on before you can hear the narration and see the pointer. The annotation and narration can be turned on by going to the “slide show” tab and clicking the three boxes shown below. Then click on the “start slide show” (either from beginning or from a current slide) to start the lecture. You can replay slides individually or let them run through sequentially. DON’T HAVE PP? You can download a MS 2010 PP reader that allows you to view this PP on any operating system: #5 Pump System Design

Steve Hubbs March 2014

Static Water Level ~140’ SYSTEM HEAD = 140’

Static Water Level ~140’ Pump pressure = 54 psi Pump OFF ~15’ Pressure gauge reads: (140’-15’)/2.31 = 54 psi SYSTEM STATIC HEAD = 140’

Static Water Level ~140’ Hydraulic Grade 150 gpm Pump pressure = 72 psi Pump ON 150 gpm 42’ f = (100/c) q /d h => 42’ pipe friction loss=H f L = total line length (3000 feet) c= roughness of pipe wall (140 for PVC) q= flow through the pipe (150 gpm) d h = pipe diameter (4 inches) 5’ 20’ Pressure gauge reads: (187’-20’)/2.31 = 72 psi SYSTEM HEAD = = 187’

Static Water Level ~140’ Hydraulic Grade 250 gpm Pump pressure = 101 psi Pump ON 250 gpm 109’ H f = 109’ 10’ SYSTEM HEAD= = 259’ Pressure gauge reads: (259’-25’)/2.31 = 101 psi 25’ L = total line length (3000 feet) c= roughness of pipe wall (140 for PVC) q= flow through the pipe (250 gpm) d h = pipe diameter (4 inches)

SANTIAGO NEW WELL-15 HP Line length = 3000’ Line Size 6 inch gpmHfHf drdwnTSH ft Line Size 4 inch gpmHfHf drdwnTSH ft

Static Water Level ~150’ Hydraulic Grade 175 gpm Pump ON 56’ NEW SANTIAGO WELL 4 inch Supply Line System Head = 236’ ~30’ Pressure gauge reads: (226’-45’)/2.31 = 78 psi H f = 56’ ~15’ L = total line length (3000 feet) c= roughness of pipe wall (140 for PVC) q= flow through the pipe (175 gpm) d h = pipe diameter (4 inches) f = (100/c) q /d h

Static Water Level ~150’ Hydraulic Grade 240 gpm Pump ON 13’ NEW SANTIAGO WELL 6 inch Supply Line System Head = 196’ ~33’ Pressure gauge reads: (196’-48’)/2.31 = 64 psi H f = 13’ ~15’ L = total line length (3000 feet) c= roughness of pipe wall (140 for PVC) q= flow through the pipe (240 gpm) d h = pipe diameter (6 inches) f = (100/c) q /d h

REFERENCES Pump Motor and Head Loss calculations Total pumping head (system performance curve) – Hazen-Williams formulas – – Add ~10% for fittings or calculate separately if pipe is long and fittings are few. System Curves and Pump Performance Curves (from Engineering in a Box) – Motor horsepower needed – Sizing the motor: – Pump Efficiency (typically 60% efficient, so make sure to include in motor sizing. – Send comments and corrections to: