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Slide 2 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. DONT HAVE PP? You can download a MS 2010 PP reader that allows you to view this PP on any operating system: http://blogs.office.com/b/microsoft-powerpoint/archive/2010/05/13/powerpoint-viewer-available-for-download.aspx #5 Pump System Design Slide 3 Steve Hubbs March 2014 Slide 4 Slide 5 Static Water Level ~140 SYSTEM HEAD = 140 Slide 6 Static Water Level ~140 Pump pressure = 54 psi Pump OFF ~15 Pressure gauge reads: (140-15)/2.31 = 54 psi SYSTEM STATIC HEAD = 140 Slide 7 Static Water Level ~140 Hydraulic Grade Line @ 150 gpm Pump pressure = 72 psi Pump ON 150 gpm 42 f = 0.002083 (100/c) 1.852 q 1.852 /d h 4.8655 => 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 = 42+140+5= 187 Slide 8 Static Water Level ~140 Hydraulic Grade Line @ 250 gpm Pump pressure = 101 psi Pump ON 250 gpm 109 H f = 109 10 SYSTEM HEAD=109+140+10 = 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) Slide 9 SANTIAGO NEW WELL-15 HP Line length = 3000 Line Size 6 inch gpmHfHf drdwnTSH ft 100325167 150628174 2501535190 3302540205 Line Size 4 inch gpmHfHf drdwnTSH ft 1002025185 1504228210 25010935283 33018240362 Slide 10 Static Water Level ~150 Hydraulic Grade Line @ 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 = 0.002083 (100/c) 1.852 q 1.852 /d h 4.8655 Slide 11 Static Water Level ~150 Hydraulic Grade Line @ 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 = 0.002083 (100/c) 1.852 q 1.852 /d h 4.8655 Slide 12 REFERENCES Pump Motor and Head Loss calculations Total pumping head (system performance curve) Hazen-Williams formulas http://www.engineeringtoolbox.com/hazen-williams-water-d_797.html http://www.engineeringtoolbox.com/hazen-williams-water-d_797.html 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) http://www.engineeringtoolbox.com/pump-system-curves-d_635.html http://www.engineeringtoolbox.com/pump-system-curves-d_635.html Motor horsepower needed Sizing the motor: http://www.engineeringtoolbox.com/pumps-power-d_505.htmlhttp://www.engineeringtoolbox.com/pumps-power-d_505.html Pump Efficiency (typically 60% efficient, so make sure to include in motor sizing. http://www.engineeringtoolbox.com/best-efficiency-point-bep-d_311.html http://www.engineeringtoolbox.com/best-efficiency-point-bep-d_311.html Send comments and corrections to: stevehubbs@bellsouth.net