Designing a Solar OvenBy Jaxon Holt

Monday, May 20, 13

Imagine for Design #1• Idea #1

• Our materials are dark felt, dark cloth, and sand.

• We need 1 unit for each material.

• The advantages of this idea are that the more materials, the more opportunities for more heat and does not hurt the environment. We also have a -1 point.

• The disadvantage of this idea is that the sand might not heat up the air.

Monday, May 20, 13

Imagine for Design #1• Idea #2

• Our material is dark shredded felt

• The advantage to this idea is that we can reuse or recycle the felt after this project.

• The disadvantage to this idea is that it only has one material.

Monday, May 20, 13

Plan for Design #1•top view

Monday, May 20, 13

Plan Design #1•side view

Monday, May 20, 13

Plan for Design #1Material Units

We will use the material

by

Dark Felt 1The felt will

absorb heat and it will be placed

on the walls.

Dark Cloth 1The cloth will

absorb the heat and will be placed

on the bottom.

Sand 1Sand gets really hot when the sun heats it and it will

be next to the cloth.

Monday, May 20, 13

Impact Score for Design #1Design

#1Reduc

e

Natural or

Processed

Reuse Recycle

Total Points

Sand

Felt

Dark Cloth

1 point Natural-1 point

Yes-1 point

Yes-1 point 1 point

1 pointProcesse

d+1 point

No+1

point

No +1

point

3 points

1 point Process

ed +1 point

Yes -1 point

No+1

point

2 points

Our total impact score is 6 points.Monday, May 20, 13

Solar Oven Testing in the Sun

Time Temperature

0 minutes 25°C

5 minutes 49°C

10 minutes 49.4°C

15 minutes 49.4°C

20 minutes 49.4°C

25 minutes 49.2°C

Monday, May 20, 13

Solar Oven in the Shade

Time Temperature

1 minute 49.2°C

2 minutes 49.1°C

3 minutes 49°C

4 minutes 48.9°C

5 minutes 48.9°C

6 minutes 48.9°C

Monday, May 20, 13

Create for Design #1• Our heat score is our solar oven maximum

temperature subtracted from the control oven:49.4°C - 55°C = -6

• Our time score is the number of minutes it took to cool down but we did not collect accurate data.

• Our total impact score was 6 points.

• We did not get accurate results so we do not have an accurate total score.

Monday, May 20, 13

Improve for Design #1• We did not have an accurate result for our total oven score.

• The part of our solar oven design that worked well was the felt because the felt absorbed the most sunlight and that made the oven hotter.

• The part if our solar oven that did not work well was the sand because it didn't heat up a lot or as much as we thought and that did not heat the oven.

• We are going to try to improve our heat and time.

• We are going to improve our heat by using foam and felt because they are both good heat conductors. We are going to improve our time by letting the better conductors collect more heat.

Monday, May 20, 13

Plan for Design #2

Monday, May 20, 13

Plan for Design #2

Monday, May 20, 13

Plan for Design #2Material Units

How we will use the material

Flat felt 2 We will put it on the sides.

Shredded dark cloth 1 We will put this

on the bottom.

Monday, May 20, 13

Impact Score for Design #2

Design #2 Reduce

Natural or processe

d Reuse Recycl

eTotal

points

Flat felt 4 pointsProcess

ed +1

point

No

+1point

No +1

point7 points

Shredded dark

cloth 1 point

Processed +1

point

Yes-1 point

No +1

point2 points

Our total solar oven score is 9 points.Monday, May 20, 13

Solar Oven Testing in the Sun

Time Tempertature

0 minutes 16°C

5 minutes 37°C

10 minutes 37.4°C

15 minutes 39.1°C

20 minutes 42°C

25 minutes 41.6°C

30 minutes 43.2°CMonday, May 20, 13

Solar Oven Testing in the Shade

Time Temperature1 minute 35.8°C2 minutes 29.7°C3 minutes 25.7°C4 minutes 23.1°C5 minutes 21.2°C6 minutes 20.2°C7 minutes 19.3°C8 minutes 18.8°C9 minutes 18.4°C10 minutes 18.1°C

Monday, May 20, 13

Create for Design #2• Our heat score is our solar ovens maximum

temperature subtracted from the control ovens maximum temperature. 43°C-41°C=2°C

• Our time score is the number of minutes it took to cool down which was 5 minutes.

• Our total impact score was 9 points.

• Our new total score -2 points.

Monday, May 20, 13

Reflection• Our improved design worked well because it got to a

high temperature but it did not insulate that heat for long so our insulation was not really good. The materials we used like dark cloth and felt for insulators we poor because they did not hold the heat in and we know that because when we put our oven in the shade the temperature dropped fast.

• If we could improve again we would improve the insulators because keeping the heat in was our only big problem our solar oven had.

Monday, May 20, 13