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ME 414 Project 2 Heat Exchanger Design

ME 414 Project 2 Heat Exchanger Design. Date: - May 6, 2009 Instructor: - John Toksoy Member: - Rahul Patel Hesam Nouri Atoosa Solhkonan Juan Tapia. Appendix. Problem Defined Objective and Specification Design Heat Exchanger Results Summary Conclusion.

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ME 414 Project 2 Heat Exchanger Design

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  1. ME 414 Project 2Heat Exchanger Design Date: - May 6, 2009 Instructor: - John Toksoy Member: - Rahul Patel HesamNouri AtoosaSolhkonan Juan Tapia

  2. Appendix • Problem Defined • Objective and Specification • Design Heat Exchanger • Results Summary • Conclusion

  3. Problem Defined • Chemical temperature must be cooled by at least 20 degrees Celsius • Mass flow rate is 220,000 kg/hr. • Material properties must be defined as water. • City Water Temperature must be 20 C. • Length of the heat exchanger can not exceed 7 meters. • Minimize pressure drop, shell and tube weight. • Shell Diameter should not exceed 2 meters.

  4. Objective • Calculate the heat transfer ratio between 0.95 and 1. • Minimize the weight of the Heat Exchanger. • Minimize the pressure drop for the shell and tube side.

  5. Design Heat Exchanger • First use notes and your experience to eliminate the variables. • Use matlab and Minitab to run the DOE on the variable to see their effect. • Find the final 4 or 5 variables that effect the heat exchanger design.

  6. Variables • Shell and Tube Fluid • Mdot Shell and Tube • Temperature of Shell in and Out • Temperature of Tube in and Out • Rf of Tube in • Rf of Tube Shell side • Shell tube side fluid reversed • Type of Flow • Number of shell and tube pass • Type of baffle • Baffle space and cut • Shell ID and thickness • Nusselt Shell and Tube • Pressure shell and Tube • Tube OD and thickness • Tube length and number of tubes • Tube Pithch and layout angle

  7. Input Variables • Shell and Tube Fluid: Water • Temperature of Shell in: 20 C • Temperature of Tube in: 45 C • Temperature of Tube Out: 25 C • Type of flow: Counter flow • Number of tube pass: 1 • Number of Shell pass: 1

  8. Design of Experiment (DOE) • Total variables: 32 • Eliminated 22 variables including the inputs using notes and experiences. • 10 Variables so 2 DOE for 5 variables in each • Reduced 6 variables using DOE • Final Variables: Mdot shell, Shell ID, Tube OD and length,

  9. First DOE: Main Effect Plots

  10. First DOE: Pareto Charts

  11. First DOE: Optimization

  12. Second DOE: Main Effect Plots

  13. Second DOE: Pareto Charts

  14. Second DOE: Optimization

  15. Final: Main Effect Plots

  16. Final: Pareto Charts

  17. Final: Optimization

  18. Final Variables Calculated • Desired/Calculated Heat Transfer Rate = 1.00 • Overall System Weight = 14382.27 kg • Tube-side Pressure Drop = 417.46 Pa • Shell-side Pressure Drop = 3092917.05 Pa

  19. Questions

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