Designing a solar oven

By:Chris E.

Monday, May 20, 13

Imagine for design #1

For are materials we used river rocks and we used one piece of flat dark foam.

Advantages the river rocks can be reused and it is natural and it can last a long time also the foam is thick

and can act as a good insulator.

Disadvantages the foam takes a long time to decompose in a landfill and it is processed.

Monday, May 20, 13

Imagine for design #1

Are materials two pieces of flat felt and one piece of shredded dark foam.

Advantages the two materials dark foam and felt are the best insulators.

Disadvantages they both can not be recycled and they both have a lot of ink in them.

Monday, May 20, 13

Plan for design #1

Monday, May 20, 13

Plan for design #1

Monday, May 20, 13

Materials UnitsHow will we use

the material

Felt 2 piecesWe are going to

leave the felt flat

Foam 1pieceWe are going to shred the foam

into pieces

Plan for design #1

Monday, May 20, 13

Design #1

ReduceNatural orProcessed

Reuse RecycleTotal

points

Felt

Foam

4 units Processed No No 7

1 units Processed No No 4

11

Impact score for design #1

Monday, May 20, 13

Solar oven testing in the sun

Time Tempature

0 minutes 25°c

5 minutes 46.2°c

10minutes 66.2°c

15 minutes 65.6°c

20 minutes 71.1°c

25 minutes 71.7°c

Monday, May 20, 13

1 minute 54.2°c

2 minutes 44.1°c

3 minutes 36.9°c

4 minutes 32.9°c

5 minutes 31.6°c

6 minutes 30°c

Solar oven in the shade

Monday, May 20, 13

Create

Our heat score is our solar oven maximum temperature subtracted from the solar oven:

72°c- 55°c=17°c

Our score time is the number of minuets it took to cool down witch was 4 minutes.

Our total impact score was 11 points the total points for the solar oven is 10 points.

Monday, May 20, 13

Improve for design #1

The total score for are first solar oven was 11 pointsThe parts of our solar oven that worked well were the

shredded foam because it was the one that kept most of the heat inside the box.

The parts of the solar oven that did not work well was the felt because it did not help a lot with keeping the heat in.

We are going to try to improve are heat score.

We will Improve are heat score by adding more foam because is was the best insulator and it will keep the heat

in.

Monday, May 20, 13

Plan for design #2

Monday, May 20, 13

Plan for design #2

Monday, May 20, 13

Materials UnitsHow will I use the

material

Felt 1I will have the felt

shredded

Foam 2I will have the

foam shredded

Plan for design #2

Monday, May 20, 13

Impact score for design #2

Design #2

ReduceNatural or processed

Reuse RecycleTotal

points

Felt

Foam

1 Processed No No 4

4 Processed No No 7

11

Monday, May 20, 13

Time Temperature

0 minutes 23°c

5 minutes 50.2° c

10 minutes 60°c

15 minutes 62°c

20 minutes 63.1°c

25 minutes 65.9°c

30 minutes 68.4°c

Solar oven testing in the sun

Monday, May 20, 13

Time Temperature 1 minute 42.1°c

2 minutes 37.2°c3 minutes 33°c4 minutes 29.2°c5 minutes 26.4°c6 minutes 24.5°c7 minutes 22.6°c8 minutes 22°c9 minutes 22.1°c10 minutes 21.8°c

Solar oven testing in the shade

Monday, May 20, 13

Create

Our heat score is our solar oven maximum temperature subtracted from the control oven 68-38=30.

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

Our total impact score was 6 points our new total score for the solar oven is 29.

Monday, May 20, 13

Reflection

Our improved design worked well because the temperature got higher faster then the other materials.

The materials we used were good insulators because they kept most of the heat in the solar oven.

If we could improve again we would keep it the same or use more shredded felt because it is good insulation.

Monday, May 20, 13