1. Heat Transfer System By Team Awesome: Sub-team Awesomer

2. Heat Transfer Team Saleh ZeidanMechanical Engineer Dirk ThurMechanical Engineer Henry AlmironMechanical Engineer

3. Agenda Background Analytical Analysis Experimental Analysis Student Scenarios Student Experiences Risk Assessment

4. Plan Background Numerical Analysis Preliminary Design CFD Analysis BuildTest Compare Results

5. Heat Sinks General Case for Fin (Assuming steady state, constant properties, no heat generation, one-dimensional conduction, uniform cross-sectional area, and uniform flow rate): Performance Parameters:

6. Problem Possible Problem: Maintaining an open air CPU at a constant temperature using a heat sink, and airflow from a fan.

7. Sketches 2/12/14

8. Analysis Design heat sink based off of given data, and create said heat sink in CAD. Numerical: Students will take the equations given, and create Simscape code to simulate heat build up in circuit. CFD: Import heat sink in CFD software, set boundary conditions, and run.

9. Build and Test Student creates fins via purchasing them. Apply fin(s) to a heating surface, which is set to a specific heat generation that the students used in the original analysis. Test and compare results to analytical/numerical values.

10. Student Scenarios 1 Objective: Determine appropriate heat sink for a chosen heat generation and airflow Materials Provided: Surface heater with variable heat generation to simulate CPU components Fan with variable wind speed. Multiple types of heat sinks Temperature Sensors Case Analysis: Chosen CPU dissipation= 80 W, Power Supply dissipation= 75 W

11. Student Scenario 1 Create heat sink(s) with CAD. Create Simscape Numerical Analysis and COMSOL CFD Analysis, compare results. Simscape Heat generation Thermal resistance values Conduction coefficient Convection coefficient Wind speed

12. Student Scenario 1 COMSOL CAD model of the heat sink Heat generation Thermal resistance values Conduction coefficient Convection coefficient Wind speed Type of material Boundary conditions 2/12/14

13. Student Scenario 1 Student will put the heat sink(s) on actual heated surfaces. Run each sink for 10 min, during the run heat sensors will be placed within the heat sink and temperatures will be measured in intervals. Allow for a 10 min cooldown between tests (1 hour per team in total). Compare to analytical/numerical results.

14. Student Experience What Comparisons can be made from between the Analysis vs. Experiment? Compare the temperature determined in the analytical model to the temperature measured in the experimental results. Compare the heat transfer rate determined in the analytical model to the heat transfer rate measured in the experimental results. What is the Student Learning or Getting Out of this Lab Experience? Students get to learn about technology and theories that are used in many modern objects around us. This module would be outside the norm of other labs that they may have preformed. It would reinforce heat transfer concepts that mechanical engineers have learned.

15. Risk Assessment IDRisk ItemCauseEffect Likelihood SeverityImportance Action of Management Owner 1Injury Human Error Minor to severe injury to student 133 Include clear instructions on how to use heated surface Team 2Damage of Property Placing flammable materials or materials with a low melting point near heated surface Property Damage 133 Always insure that the area around the heated surface is clear. Team

16. Question?