1. Fins Design Project

2. Problem Does adding fins to the heating coil of a conventional oven significantly reduce the time required to heat the oven? Objectives Analytically – Set up the problem Experimentally – Run an experiment to see how accurate our analytical approach is

3. Fins

4. Analytical Solution

5. Analytical Assumptions Our model lumps all 3 heat transfer modes Assume no energy loss Assume constant air density Assume constant specific heat

6. 1 st Experiment: conventional oven Equipment: Conventional Oven Thermocouple Stopwatch

7. 2 nd experiment: conventional oven with fins Equipment: Conventional Oven Thermocouple Stopwatch 46 Fins

8. Experimental Results T Steady State 71° F T When Buzzer Sounds 456° F t to reach 350° F 6:08.75 t to buzzer 3:55.08 With FinsWithout Fins T Steady State 71° T When Buzzer Sounds 442° t to reach 350° F 6:53.03 t to buzzer 4:47.92

9. Conclusion Placing fins on the heating coil decreased the amount of time needed to heat the oven Recommendations Find a better way to measure the temperature of the heating coil