Project 1: Design of Car Ventilation System

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Project 1 Design of Car Ventilation System

• ME 414
• Professor Toksoy
• Fall 2006
• Group members
• Adam Spindler
• Mike Hay
• Phil Palmer
• Brian Schludecker
• Joe Mcguire

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Objectives

• Minimize pressure losses in each branch
• Equalize pressure losses in each branch
• Approximately equal velocities at exits
• Use AFT software to optimize the design

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• Qinlet0.005 m3/s
• Qbranch0.0016 m3/s
• Exit pressure 1 atm
• Pipe material is plastic

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AFT MODEL
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Results for Left Branch

• Minimize pressure drop in the left branch
• Smooth bends used to reduce flow resistance
• r/d 1 ? K 0.36
• r/d2 ? K 0.216
• Location of contractions
• Total Pressure Losses 0.0614 Pa
• Outlet Velocity 1.39 m/s

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Results for Right Branch

• Equalize Pressure Losses in right branch to that
  in the Left branch
• Used smooth bend to reduce flow resistance
• r/d 2 ? K 0.2142
• Total Pressure Loss 0.0606 Pa
• Outlet Velocity 1.39 m/s

58 cm
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Results for Middle Branch

• Equalize Pressure Losses in middle branch to that
  in the Left and right branch
• No losses due to bends
• Largest exit area
• Total Pressure Losses0.0604 Pa
• Exit Velocity 1.04 m/s

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Conclusions

• Pressure Losses were minimized in left branch
• Pressure Losses were approximately equalized in
  each branch.
• Exit velocities were the same in the left Right
  branch slightly lower in middle branch.
• Total weight of raw material is 1.1706 kg
• Total cost can be found by multiplying this value
  by a specified (/kg) value for any specified
  material.

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Questions ?