1. Project 2: Heat Exchanger Design Group Members: Brian Schludecker Phillip Palmer Adam Spindler Mike Hay Joe McGuire Presented 12/12/2006 to Dr. Toksoy and ME 414 Class, IUPUI

2. Project Summary Design and optimization of heat exchanger Specifications & objectives Methods Results Conclusions

3. Heat Exchanger Specifications Heat exchanger length must not exceed 7 m Shell diameter must not exceed 2 m Shell mass flow rate: 120,000 kg/hr Water in shell must cool from 40 C to 25 C Water in tube enters at 20 C Ignore fouling

4. Objectives Maximize Q Minimize Weight (cost) Minimize heat exchanger pressure drop

5. Design Strategy Configure MATLAB files to analyze the heat exchanger Modify input factors until heat transfer ratio is close to 1 Run DOE in MATLAB and Minitab to calculate optimal values for system

6. Design Factors Tube outer diameter Shell inner diameter Tube length Number of tube passes Material Pitch Number of Baffles Baffle Spacing

7. Design Factors for DOE Tube outer diameter Shell inner diameter Tube length Number of tube passes Material Pitch Number of Baffles Baffle Spacing

8. Design Decisions Pitch = 1.25 * Tube outer diameter 0 baffles

9. Interaction & Main Effects Plots (to find Critical Factors)

11. Mean Effects Plots

12. Pareto Charts

13. Design Decisions Critical factors: Length, Shell ID, Tube OD Material: Aluminum (cost, weight) 1 pass

14. Optimized Results +/- 20%  Using guesses (from Matlab): Optimized results are not standard Size ID and OD, choose close sizes:

15. Optimized Specifications Tube OD = 0.0127 mm Shell ID = 0.5906 m Length = 3.3682 m

16. Final Results Q maximized2.099E6 W dP in shell minimized463 Pa dP in tube minimized1500 Pa Weight minimized1108 kg

17. Conclusions Minitab optimized values for ID and OD are not standard tube/shell sizes, need to adjust Minitab results Objectives achieved Further analysis possible for multiple passes/baffles Questions?