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Heat Exchanger Design

Heat Exchanger Design. ME 414 – Team #1 Jennifer Hacker Jesse Kendall Christopher Rogers Brandon Rodriguez Alek Vanluchene. Problem Statement.

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Heat Exchanger Design

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  1. Heat Exchanger Design ME 414 – Team #1 Jennifer Hacker Jesse Kendall Christopher Rogers Brandon Rodriguez Alek Vanluchene

  2. Problem Statement Design a heat exchanger that cools a corrosive chemical with water properties from 45 C to 25 C with a mass flow rate of 220,000 kg/hr using city water at 22 C with variable mass flow rate.

  3. Design Requirements Heat Exchanger Length is less than 7 m Heat Exchanger Diameter is less than 2 m Minimize Pressure Losses in both shell and tube Minimize Weight

  4. Variable Reduction Tube & Shell Material – Stainless Steel Tube will carry corrosive material for ease of cleaning Counter flow was selected due to increase efficiency Single pass selected due to lower pressure drop, small cooling requirement, and cost Shell thickness was selected to minimize weight and handle maximum pressure of the heat exchanger.

  5. Variable Reduction Cont ….. Center tube diameter was selected to be the same size as other tubes to reduce cost For efficiency and ease of cleaning a square pitch was chosen The pitch angle was chosen to be 90 deg since the angle did not affect the design parameters The MATLAB program chose the number of tubes based on the shell diameter

  6. To Baffle or Not? • Advantages • Higher Heat Transfer • Disadvantages • Higher Pressure Loss • Increased Weight • Since the chemical only required a small amount of cooling (20 C) the baffles were not needed for the gain in heat transfer.

  7. Main Effect Plots - Q

  8. Main Effect Plots – ΔP Tube

  9. Main Effect Plots – ΔP Shell

  10. Main Effect Plots – Weight

  11. Pareto Chart

  12. Minitab Optimization

  13. End Results

  14. Questions ?

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