Irrigation Design

1
Irrigation Design
ME 414 Thermal/Fluid Systems

• Jim Hahn
• Kelly McCormick
• Jeff Snyder
• Andrew Taylor
• Nathan Wagers

2
Problem Statement

• Design an efficient yard irrigation system where
  cost, delivering time, and wasted water are all
  minimized.

http//www.popularmechanics.com/home_journal/garde
ning 12/11/07
3
Customer Requirements

• Minimize
• Equipment Costs
• Delivering Time
• Wasted Water
• Electric Utility Costs
• Even Distribution of 1 inch Depth of Water

4
Yard Definition
5
Divide and Conquer
6
Expected Flow Rates Per Zone
7
Analysis of Sprinkler Layout

• 3 Zones Driving Force is Geometry
• Source of Water Central Location
• Assume Infinite Flow
• 60 psig available
• 100 Overlap to Ensure Satisfactory Water
  Distribution
• Eliminate Spray outside of Yard Boundaries
• Need for Several Sizes of Sprinkler Heads

8
Sprinkler Heads
9
AFT Fathom Zone 1
10
AFT Fathom Zone 2
11
AFT Fathom Zone 3
12
AFT Results Flow Rates
13
Cost Analysis Zone 1
14
Cost Analysis Zone 2
15
Cost Analysis Zone 3
16
Cost Analysis Total
17
Questions?
18
Heat Exchanger Design
ME 414 Thermal/Fluid Systems

• Jim Hahn
• Kelly McCormick
• Jeff Snyder
• Andrew Taylor
• Nathan Wagers

19
Problem Statement

• Design Shell and Tube Heat Exchanger to Use City
  Water to Remove 1.2M Watts from Process Water.
• Process Water
• Inlet Temperature 90 C
• Outlet Temperature 40 C
• City Water
• Inlet Temperature 25 C

20
Design Criteria

• Meet 1.2M Watts of Thermal Requirement
• Minimize Tube Side Shell Side Pressure Drops
• Minimize Raw Material Cost, By Weight
• Minimize Heat Exchanger Internal Volume
• HE Length Should Not Exceed 8 Meters.

21
Analysis Tools

• Matlab
• HE Design Program Used to Perform Calculations
  Based on Known Design Parameters.
• Minitab
• Used to Perform Statistical Analysis of Design
  of Experiment Studies Performed with Matlab
  Program.

22
Initial Parameters

• Tube OD
• Tube Length
• Tube Thickness
• Tube Layout Angle
• Tube Material
• Tube Pitch
• Shell ID

• Shell Material
• Shell Thickness
• City Water Flow Rate
• Counter or Parallel Flow
• City Water Flow Side
• Baffles Yes or No
• Baffle Spacing

23
Main Effects Plots
Used to Eliminate Variables with Little Effect on
Main Criteria
24
Interaction Plots
Used to Identify Variables which Interact to
Affect Main Criteria
25
Pareto Charts
Used to Identify Variables Relative Level of
Effect on Main Criteria
26
Optimization
Four Final Variables Identified and Used to
Optimize Two Final Designs
Design 1 Optimized for Pressure Drops
Design 2 Optimized for Weight Cost
27
Design 1 Specifications
28
Design 2 Specifications
29
Design Comparison

• Design 1 Delta P Optimized

• Design 2 Weight Optimized

• Thermal Capacity 1.2M Watts
• Material Weight 109.9 Kg
• Total Weight 374.9 Kg
• Material Cost 120.91
• Volume 1.13 m3
• Delta P Shell 628.9 Pa
• Delta P Tube 167.6 Pa

• Thermal Capacity 1.2M Watts
• Material Weight 73.1 Kg
• Total Weight 228.7 Kg
• Material Cost 80.36
• Volume 1.01 m3
• Delta P Shell 701.3 Pa
• Delta P Tube 933.7 Pa

30
References

• Toksoy, John. ME 414 Thermal-Fluid Systems
  Design. Department of Mechanical Engineering,
  IUPUI, Indianapolis, IN, Fall 2007.
• Kakaç, S., Hongtan, L. Heat Exchangers
  Selection, Rating, and Thermal Design. 2nd Ed.,
  CRC Press LLC, Boca Raton, FL, 2002, 7 Dec 2007.

31
Questions?