Sprinkler System Design

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Sprinkler System Design

• ME 411 Presentation
• Adam Christensen
• Jason Stenz
• David Banks
• Greg Volovsek

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Problem Statement

• Residential sprinkler system needed
• Area to be covered 90 ft. x 100 ft.
• No landscaping has been completed
• St. Augustine grass to be planted with trees
  along driveway
• Must include integrated fertilization system
• Well located on property to supply 40 psig to a
  supply tank

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Design Specifications Spray Pattern
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Design Specifications - Network Schematic
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Design Specifications Pipe Network

• 8 spray nozzles - 180º Spray pattern
• PVC Piping Standard sizes
• Least expensive
• Lowest losses
• Most effective coverage
• Least invasive for repairs
• Symmetrical design for easiest analysis

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Design Specifications Pump Selection

• Well water storage tank was determined to be
  insufficient for the system
• Pressure required at nozzles 55-65 psig (for
  full coverage)
• Using Modified Bernoullis Equation, flowrate and
  head were determined to be 68.9 gpm and 85.9
  feet.
• Pump selected 
• Maximum Flow68 gpm
• Maximum Head110 ft
• Required Power1.5 hp
• Inlet Diameter1.25 in
• Outlet Diameter1 in
• Speed3450 rpm

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Design Specifications Frequency of Operation

• St. Augustine grass requires approximately 1 inch
  of rain/week
• Average rainfall in selected region (Salt Lake
  City) is .355/week
• Area to cover 18,000 ft2
• Amount of water needed per week 11,200 gallons
• Operate twice per week at dusk
• Amount of water dispersed per operation 3,620
  gallons
• Based on flowrate of nozzles, operating time 40
  minutes/operation
• Cost of sprinkler operation 5.77/yr (excluding
  water cost)

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Design Specifications Cost Analysis

• Sprinkler system designed to meet general
  building codes
• Sprinkler manufacturer Toro
• Major components
• Toro V-1550 Sprinkler heads (8) 264.96
• Hunter SRC Control Module (1) - 73.67
• Fertigator Fertilization System (1) 250.00
• Double Check Valve (1) - 92.57
• Monarch 68 GPM Pump (1) - 537.00
• Installation
• Can be done by Homeowner
• Professional Landscaper- 1,500

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Design Specifications Cost Analysis
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Summary Cost and Design

• Design
• 90 by 100 Yard with Driveway and Trees
• Salt Lake City, St. Augustine Grass
• ¾ and 1 Schedule 40 PVC Pipe
• Fertigator Irrigation System
• 1.5 HP, 68 GPM Pump
• Toro V-1550 Sprinklers
• Cost
• Materials - 1,540.95
• Labor - 1,500.00
• Operation - 5.77 per year

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Questions?