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#5 Pump System Design

#5 Pump System Design. This PP is annotated (with a pointer) and narrated (using PP versions 2007 and later). The speaker icon on each slide indicates this capability.

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#5 Pump System Design

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  1. #5 Pump System Design • 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: • http://blogs.office.com/b/microsoft-powerpoint/archive/2010/05/13/powerpoint-viewer-available-for-download.aspx

  2. #5 Pump System Design Steve Hubbs March 2014

  3. Static Water Level ~140’ SYSTEM HEAD = 140’

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

  5. Hydraulic Grade Line @ 150 gpm 42’ L = total line length (3000 feet) c= roughness of pipe wall (140 for PVC) q= flow through the pipe (150 gpm) dh = pipe diameter (4 inches) Static Water Level ~140’ Pump pressure = 72 psi Pump ON 150 gpm 20’ Pressure gauge reads: (187’-20’)/2.31 = 72 psi 5’ SYSTEM HEAD = 42+140+5= 187’

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

  7. SANTIAGO NEW WELL-15 HP Line length = 3000’

  8. Hydraulic Grade Line @ 175 gpm 56’ L = total line length (3000 feet) c= roughness of pipe wall (140 for PVC) q= flow through the pipe (175 gpm) dh = pipe diameter (4 inches) Static Water Level ~150’ f = 0.002083 (100/c)1.852 q1.852/dh4.8655 Pressure gauge reads: (226’-45’)/2.31 = 78 psi Hf = 56’ Pump ON ~15’ NEW SANTIAGO WELL 4 inch Supply Line System Head = 236’ ~30’

  9. Hydraulic Grade Line @ 240 gpm 13’ L = total line length (3000 feet) c= roughness of pipe wall (140 for PVC) q= flow through the pipe (240 gpm) dh = pipe diameter (6 inches) Static Water Level ~150’ f = 0.002083 (100/c)1.852 q1.852/dh4.8655 Pressure gauge reads: (196’-48’)/2.31 = 64 psi Hf = 13’ Pump ON ~15’ NEW SANTIAGO WELL 6 inch Supply Line System Head = 196’ ~33’

  10. 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 • Add ~10% for fittingsor 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 • Motor horsepower needed • Sizing the motor: http://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 • Send comments and corrections to: stevehubbs@bellsouth.net

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