jim hahn kelly mccormick jeff snyder andrew taylor nathan wagers me 414: thermal/fluid systems
TRANSCRIPT
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Jim HahnKelly McCormick
Jeff SnyderAndrew TaylorNathan Wagers
ME 414: Thermal/Fluid Systems
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Design an efficient yard irrigation system where cost, delivering time, and wasted water are all minimized.
http://www.popularmechanics.com/home_journal/gardening12/11/07
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Minimize: Equipment Costs Delivering Time Wasted Water Electric Utility Costs
Even Distribution of 1 inch Depth of Water
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Back (Zone 1)
Front (Zone 2)
Drive (Zone 3)
Area 8400 ft2 3980 ft2 1080 ft2 Volume 700 ft3 332 ft3 90 ft3
Gallons 5236.4 2481.0 673.2Minutes 135 76 65
GPM 38.7 32.76 10.4
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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
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Rainbird Sprinkler Heads
Pressure (psi)
Radius (ft) GPM Inlet Adjustment #
42SA All Purpose Rotor 2526-38 (35) 2.58 3/4" NPT Female 25% 15
22SA-F Full Rotor 2317-24 (18) 2.6 1/2" NPT Female -- 6
22SA-F Half Rotor 2317-24 (18) 2.6 1/2" NPT Female -- 13
22SA-Q Quarter Rotor 2317-24 (18) 2.6 1/2" NPT Female -- 9
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Jim HahnKelly McCormick
Jeff SnyderAndrew TaylorNathan Wagers
ME 414: Thermal/Fluid Systems
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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
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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.
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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.
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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
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Used to Eliminate Variables with Little Effect on Main Criteria
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Used to Identify Variables which Interact to Affect Main Criteria
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Used to Identify Variables’ Relative Level of Effect on Main Criteria
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Four Final Variables Identified and Used to Optimize Two Final Designs
Design #1 – Optimized for Pressure DropsDesign #2 – Optimized for Weight & Cost
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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
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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.
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