ME 414 Project 2 Heat Exchanger Design Date: - May 6, 2009 Instructor: - John Toksoy Member: - Rahul Patel Hesam Nouri Atoosa Solhkonan Juan Tapia.

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Presentation transcript:

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

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.

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.

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.

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

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

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,

First DOE: Main Effect Plots

First DOE: Pareto Charts

First DOE: Optimization

Second DOE: Main Effect Plots

Second DOE: Pareto Charts

Second DOE: Optimization

Final: Main Effect Plots

Final: Pareto Charts

Final: Optimization

Final Variables Calculated Desired/Calculated Heat Transfer Rate = 1.00 Overall System Weight = kg Tube-side Pressure Drop = Pa Shell-side Pressure Drop = Pa

Questions