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# Heat Exchanger Design - PowerPoint PPT Presentation

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

ME 414- Fluid Systems Design

Professor: John Toksoy

Spring 2009

team

Tyler Laughlin

Denis Shkurapet

Ethan Sneed

Matt Tolentino

Tyler Turk

• 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

# 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)

• 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.

7 Factor Analysis for DP_Tube

Analysis: 1st Optimization

Minitab solved for a local solution.

The starting values were changed multiple times until Minitab found a new, more optimal solution.

Analysis: 2nd Optimization

Starting values of the optimization were varied with no improvement in performance.

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

• 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