Designing a solar ovenBy: Cruz Flores

Monday, May 20, 13

Imagine for design #1Idea #1

Our materials are shredded foam we put it on the bottom shredded felt we put it on sides and we also needed shredded cloth and we out it on the opposite sides.

We needed 1 unit of everything.

The advantages of this idea is most of our materials are insulators, there fore keeping the heat inside, and most are in the least environmental impact.

The disadvantages of this idea is foam has a big environmental impact.

Monday, May 20, 13

Imagine for design #1Idea #2

Our materials are shredded cloth on tow sides also shredded felt on the bottom and shredded with foam on the other sides.

We needed 1 unit for everything.

The advantages of this idea is these are insulators and they have little environment impact.

The disadvantages of this idea is we would prefer to use three different materials but the third material had to much environment impact so we chose a different one.

Monday, May 20, 13

Plan for design #1

Monday, May 20, 13

Plan for design #1

Monday, May 20, 13

Plan for design #1Materials How many units will

you need?How will you use the

material?

Cloth 1 unit = 1 sheets Shred

Felt 1 unit = 1 sheets Shred

White foam 1 unit Shred

Monday, May 20, 13

Impact score for design #1Design #1 Reduce Natural or

Processed Reuse Recycle Points

Cloth 1 unit Processed Yes No. 2pts.

Felt 1 unit Processed No No 4pts.

White foam 1 unit Processed No Yes 2pts.

Monday, May 20, 13

Solar oven testing in the sun

Time Temperature

0 minutes 25°C

5 minutes 38.9°C

10 minutes 47.7°C

15 minutes 50.0°C

20 minutes 54.3°C

25 minutes 65.5°C

Monday, May 20, 13

Solar oven in the shadeTime (minutes) Solar Oven Temperature

1 minute 63.8°C

2 minutes 50°C

3 minutes 40.5°C

4 minutes 33.6°C

5 minutes 31.4°C

Monday, May 20, 13

Create for design #1

Our heat score is our solar oven maximum temperature subtracted from the control oven: 66°C - 55°C = 11°C.

Our time score is the number if minutes it took to cool down which as 4 minutes.

It total impact score was 8 points.

Our total score for the solar oven is 7.

Monday, May 20, 13

Improve for design #1The total score for our first solar oven was 7.

The parts of our solar oven design that worked well were out insulator worked very well because they were light colors.

The parts of our solar oven design that did not work well were the plastic would always fall from the hole in the box because we didn't tape it well.

We are going to try to improve our heat score and our impact score.

We will improve these scores by using different insulators that don't have a lot of impact. W can also use darker materials.

Monday, May 20, 13

Plan for design#2

Monday, May 20, 13

Plan for design #2

Monday, May 20, 13

Plan for design #2Materials How many units

will you need?How will you use the

material?

Cloth 1 unit = 1 sheets Shred

Newspaper 1 unit = 1 sheets Crumple

Cotton 1 unit = 1 sheets Pull/shred

Monday, May 20, 13

Plan for design #2Design #2 Reduce Natural or

processed Reuse Recycle Points

Cloth 1 unit Processed Yes No 2pts.

Newspaper 1 unit Processed Yes Yes 0pts.

Cotton balls 1 unit Processed No No 4pts.

Monday, May 20, 13

Solar oven testing in sunTime Temperature

0 minutes 24.4°C

5 minutes 40.5°C

10 minutes 39.0°C

15 minutes 36.2°C

20 minutes 38.8°C

25 minutes 54.4°C

30 Minutes 55.6°CMonday, May 20, 13

Solar oven testing in ShadeTime (minutes) Temperature

1 minute 30.0°C2 minutes 30.0°C3 minutes 30.0°C4 minutes 29.3°C5 minutes 28.4°C6 minutes 27.2°C7 minutes 26.3°C8 minutes 25.8°C9 minutes 25.8°C

10 minutes 26.4°CMonday, May 20, 13

Create for design #2Our heat score is our solar oven maximum temperature subtract from the control oven: 56°C-53°C=3°C.

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

Our total impact score was 6 points.

Our new total score of the solar oven is 1.

Monday, May 20, 13

Reflection Our improved design did not work well because the materials we used did not trap the heat in that much.

The materials we changed were poor insulators because the total score from last time was 7 and the second time we did are design the total score was 1. Also cotton let the heat in that much and the newspaper let the heat pass through that much. Also there wasn't that much cloth so I think it didn't get a lot of heat.

If we could improve it again, we would use the same materials as the first time because are score was 7 the first time and the second time are score was 1 so we could of stayed with the same materials in the first time. The materials we were used are cloth, foam, and felt.

Monday, May 20, 13