1. Designing a solar oven
By: Lesly Alvarado
Monday, May 20, 13

2. Imagine for design #1
Idea # 1
Our materials are white cloth, felt, and foam
We need 1 unit of each material.
The advantage of this idea is that they are all
good insulators.
The disadvantage of this idea is that the white
clothe won't absorb the heat it will bounce it.
Monday, May 20, 13

3. Imagine for design # 1
Idea # 2
Our materials are foam, and white cloth
We need 1 unit of foam and 2 units of whit cloth.
The advantage if this idea is that the foam will keep the
heat in.
The disadvantage of this idea is that the white cloth will
not absorb the heat.
Monday, May 20, 13

4. Plan for design # 1
Top view
Monday, May 20, 13

5. Plan for design # 1
Side view inside
Monday, May 20, 13

6. Plan for design # 1
Material Units
We will use the
material by
White cloth
White foam
Felt
1
Shredded under
the foam
1
Not shredded
under the pot
1
Shredded all
around the inside
sides
Monday, May 20, 13

7. Impact score for design # 1
Design
# 1
Reduce
Natural
or
process
esd
Reuse Recycle
Total
Points
Materia
l
White
cloth
Materia
l
White
foam
Materia
l
Felt
1 unit
Process
ed
Yes No + 2
1 unit
Process
ed
No Yes + 2
1 unit
Process
ed
No No + 4
Our total impact score is + 8 points.
Monday, May 20, 13

8. Solar oven testing in the sun
Time Temperature
0 minutes 25 c
5 minutes 53.5 c
10 minutes 59 c
15 minutes 68.8 c
20 minutes 68.7 c
25 minutes 71.4 c
Monday, May 20, 13

9. Solar oven in the shade
Time Temperature
1 minute 53.3 c
2 minutes 41.9 c
3 minutes 35.8 c
4 minutes 33.5 c
5 minutes 31.5 c
6 minutes 30.3 c
Monday, May 20, 13

10. Create for design # 1
Our heat score is our solar oven maximum temperature
subtracted from the control oven: 71 c - 55 c = 16
Our time score is the number of minutes it took to cool
down which was 3 minutes.
Our total impact score was + 8 points.
Our total score for the solar oven is 11.
Monday, May 20, 13

11. Improve for design # 1
The total score for our first solar oven was 11 points.
The parts of our solar oven design that workers well were the
insulation because it kept a lot of heat in.
The parts of our solar oven design that did not work well was the
white cloth because it didn't keep that much heat in.
We are going to try to improve our heat score and our impact score.
We will improve our heat score by using dark color cloth instead of
the white one because dark colors absorb the heat.
Monday, May 20, 13

12. Plan for design # 2
Top view
Monday, May 20, 13

13. Plan for design # 2
Side view
Monday, May 20, 13

14. Plan for design # 2
Material Units
How will you
use this
material?
Dark color cloth 1 unit
Shredded under
the foam
Foam 1 unit
Not shredded
and under the
pot
Felt 1 unit
Shredded on 3
sides on the
inside
Monday, May 20, 13

15. Impact Score for Design #2
Design
# 2
Reduce
Natural
or
processe
d
Reuse Recycle
Total
points
Material
Dark
color
cloth
Material
Foam
Material
Felt
1 unit Processed Yes No + 2
1 unit Processed No Yes + 2
I unit Processed No No + 4
Our total impact score is + 8 points.
Monday, May 20, 13

16. Solar oven testing in sun
Time Temperature
0 minutes 28.7 °c
5 minutes 59.0 °c
10 minutes 63.7 °c
15 minutes 58.4 °c
20 minutes 59.9 °c
25 minutes 57.5 °c
30 minutes 53.5 °c
Monday, May 20, 13

17. Solar oven testing in shade
Time Temperature
1 minute 32.8 °c
2 minutes 30.9 °c
3 minutes 32.7 °c
4 minutes 32.0 °c
5 minutes 31.3 °c
6 minutes 31.0 °c
7 minutes 30.7 °c
8 minutes 30.1 °c
9 minutes 29.9 °c
Monday, May 20, 13

18. Create for design #2
Our heat score is our solar oven maximum temperature
subtracted from the control oven: 64-56= 8
Our time score is the number of minutes it took to cool
down which was 2 minutes.
Our total impact score was 8 points.
Our new total score for the solar oven is 2
Monday, May 20, 13

19. Reflection
Our improved design did not work well because it did
not keep most of the heat in. The materials we changed
was only the cloth. The material was good because it
absorb the heat but it was a poor insulator because it
didn't keep most of the heat in. We know this because
when the solar oven was in the shade the temperature
went down really fast.
If we could improve again, we would put back the white
cloth because in our first design our total score was 11.
Monday, May 20, 13