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Project 2: Heat Exchanger Design

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

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Project 2: Heat Exchanger Design

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  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)

  10. 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 Using guesses (from Matlab): +/- 20%  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 maximized 2.099E6 W • dP in shell minimized 463 Pa • dP in tube minimized 1500 Pa • Weight minimized 1108 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?

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