ME 414 Project 2 Heat Exchanger Design

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ME 414 Project 2Heat Exchanger Design

• Team Members
• Diego Quevedo
• Javier Angulo
• Colin Sanberg
• Mike Abel
• Avery Sheets

Department of Mechanical Engineering December 12,
2006 Professor John Toksoy
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Introduction

• Problem Statement
• Objectives
• Summary of Results
• Design Process
• DOE, Main Effects Plots, Optimization
• Conclusion

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Problem Statement

• Must cool a chemical from 40 C to 25 C
• Heat exchanger length can not exceed 7 m
• Heat exchanger shell diameter can not exceed 2 m
• Shell mass flow rate is 33.3 kg/s

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Objectives

• Obtain a heat transfer ratio of 1
• Minimize pressure drop
• Minimize weight
• Minimize cost

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Summary of Results
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Potential Parameters

• Shell Mass Flow Rate
• Shell Inner Diameter
• Shell Thickness
• Shell Material
• Flow Type
• Pitch Type

• Tube Outer Diameter
• Tube Length
• Tube Thickness
• Tube Material
• Tube Layout Angle
• Tube Passes

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First Decisions

• Flow Type
• Counter Flow
• Pitch Type
• Square Pitch
• Tube Layout
• 90 degrees
• Material
• Aluminum-Low density, high thermal conductivity

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Design of Experiment

• Using the 6 parameters outlined earlier
• Determine 20 range of parameters
• Run DOE program in MATLAB
• Export the output file to Minitab
• Obtain Main Effects Plots, Interaction Plots, and
  Pareto Charts

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Main Effects Plots
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Re-Analyze Parameters

• Narrow the original 6 parameters to 4
• Tube OD
• Shell ID
• Tube Length
• Mass Flow Rate

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Pareto Charts
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Optimization
1st Iteration
2nd Iteration
Final Iteration
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Optimization

• Optimal values taken from Minitab
• Values input into MATLAB

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Conclusion

• Optimum values from Minitab input into MATLAB
• Values in MATLAB better than values in Minitab

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Conclusion

• Ratio 1.00
• Maintenance Cost
• Small pressure losses mean less strain on the
  pump
• Material Cost
• 2113.37lbs1.20/lb (Al) 2536.05
• Balance between material and maintenance cost

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References

• Aluminum Price
• http//www.purchasing.com/article/CA6395531.html
• ME 414 Course Notes

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Questions