1. 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

2. 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

3. Qinlet=0.005 m3/s
Qbranch= m3/s
Exit pressure = 1 atm
Pipe material is plastic

4. AFT MODEL

5. 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/d=2  K = 0.216
Location of contractions
Total Pressure Losses = Pa
Outlet Velocity = 1.39 m/s

6. 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 =
Total Pressure Loss = Pa
Outlet Velocity = 1.39 m/s
58 cm

7. 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 Losses= Pa
Exit Velocity = 1.04 m/s

8. 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 kg
Total cost can be found by multiplying this value by a specified ($/kg) value for any specified material.

9. Questions ?