Fins Design Project

ProblemDoes 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

Fins

Analytical Solution

ower

TTVct

Vc

owertTT

owerVt

Tc

oap

poa

ap

))((

)(

Analytical Assumptions

• Our model lumps all 3 heat transfer modes

• Assume no energy loss

• Assume constant air density

• Assume constant specific heat

1st Experiment: conventional oven

Equipment:

• Conventional Oven

• Thermocouple

• Stopwatch

2nd experiment: conventional oven with fins

Equipment:•Conventional Oven•Thermocouple•Stopwatch•46 Fins

Experimental Results

TSteady State 71° F

TWhen Buzzer Sounds 456° F

tto reach 350° F6:08.75

tto buzzer3:55.08

With Fins Without Fins

TSteady State 71°

TWhen Buzzer Sounds 442°

tto reach 350° F6:53.03

tto buzzer4:47.92

ConclusionPlacing 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