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Heat Exchanger Design

Heat Exchanger Design. ME 414- Fluid Systems Design Professor: John Toksoy Spring 2009 team Tyler Laughlin Denis Shkurapet Ethan Sneed Matt Tolentino Tyler Turk. Objective. To design a heat exchanger than meets the following criteria: Cools liquid from 45 C to 25 C

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Heat Exchanger Design

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  1. Heat Exchanger Design ME 414- Fluid Systems Design Professor: John Toksoy Spring 2009 team Tyler Laughlin Denis Shkurapet Ethan Sneed Matt Tolentino Tyler Turk

  2. Objective • To design a heat exchanger than meets the following criteria: • Cools liquid from 45 C to 25 C • Must be less than 7 meters in length • Shell diameter is less than 2 meters • Minimize weight of the tube and shell • Minimize pressure drop • Heat transfer ratio of 1

  3. Design Parameters # of tubes passed Tube outer diameter Tube inner diameter Material Baffles Shell thickness Shell Material Strength factors Fluid allocation Type of flow (parallel or counter)

  4. Analysis • Use Minitab and Matlab • Minitab • Use to obtain the main effects plots, Pareto charts, and the response optimizer. • Matlab • Use to run analysis of the DOE files and to give us the outputs of total weight, calculated heat transfer, cost, and pressure drops. • DOE allows us to determine the most important variables in this design.

  5. Results

  6. Results

  7. Results

  8. Analysis: 1st DOE

  9. Analysis: Pareto Charts 1st DOE 7 Factor Analysis for DP_Tube

  10. Analysis: 1st Optimization Minitab solved for a local solution. The starting values were changed multiple times until Minitab found a new, more optimal solution.

  11. Analysis: 2nd DOE

  12. Analysis: 2nd Optimization Starting values of the optimization were varied with no improvement in performance.

  13. Conclusions: Damn near perfect! Heat Transfer Coeff : 876.97 W/m2.C R-value: 0.98 Number of tubes: 1313 Shell Pressure Loss: 335.11 Pa Tube Pressure Loss: 29832.58 Pa Weight of Heat Exchanger: 350.88 kg

  14. Conclusions: Recommendations • Could be further optimized if Tube Thickness was decreased • Resulting in: • Lower weight - decrease of 51.93 kg • Lower Tube pressure loss - decrease of 6703.1 Pa • No significant loss of R-value • A smaller tube is not commercially available • Possibly achieve greater performance at a greater price

  15. Questions

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