Jim Hahn Kelly McCormick Jeff Snyder Andrew Taylor Nathan Wagers ME 414: Thermal/Fluid Systems.

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Presentation transcript:

Jim Hahn Kelly McCormick Jeff Snyder Andrew Taylor Nathan Wagers ME 414: Thermal/Fluid Systems

Design an efficient yard irrigation system where cost, delivering time, and wasted water are all minimized. 12/11/07

 Minimize:  Equipment Costs  Delivering Time  Wasted Water  Electric Utility Costs  Even Distribution of 1 inch Depth of Water

Back (Zone 1) Front (Zone 2) Drive (Zone 3) Area 8400 ft ft ft 2 Volume 700 ft ft 3 90 ft 3 Gallons Minutes GPM

 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

Rainbird Sprinkler Heads Pressure (psi) Radius (ft)GPMInletAdjustment# 42SA All Purpose Rotor (35)2.58 3/4" NPT Female25%15 22SA-F Full Rotor (18)2.6 1/2" NPT Female--6 22SA-F Half Rotor (18)2.6 1/2" NPT Female SA-Q Quarter Rotor (18)2.6 1/2" NPT Female--9

Jim Hahn Kelly McCormick Jeff Snyder Andrew Taylor Nathan Wagers ME 414: Thermal/Fluid Systems

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

 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.

 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.

 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

Used to Eliminate Variables with Little Effect on Main Criteria

Used to Identify Variables which Interact to Affect Main Criteria

Used to Identify Variables’ Relative Level of Effect on Main Criteria

Four Final Variables Identified and Used to Optimize Two Final Designs Design #1 – Optimized for Pressure Drops Design #2 – Optimized for Weight & Cost

DESIGN #1 – DELTA P OPTIMIZEDDESIGN #2 – WEIGHT OPTIMIZED  Thermal Capacity: 1.2M Watts  Material Weight: Kg  Total Weight: Kg  Material Cost: $  Volume: 1.13 m 3  Delta P Shell: Pa  Delta P Tube: Pa  Thermal Capacity: 1.2M Watts  Material Weight: 73.1 Kg  Total Weight: Kg  Material Cost: $80.36  Volume: 1.01 m 3  Delta P Shell: Pa  Delta P Tube: Pa

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