2. Imagine for design #1
• Idea #1 did not work well but it kept most of the heat in the solar oven.
• Our materials are the dark cloth, and the foam plate.
• We need 1 unit for the dark cloth and 2 for the foam plates.
• The advantage of this idea are that the cloth is reusable and the foam is
recyclable, the cloth absorbs more of the heat and the foam traps the
heat in the solar oven, the foam is around the box.
• The disadvantage of this idea is the flame tacks more time to break
down in a land fill and it will impact on our impact score.
Monday, May 20, 13
3. Imagine for design #1
• Idea #2 is to put foam on the bottom and the cloth on the
sides of the solar oven.
• Our materials are light cooled cloth and foam plates.
• We need 2 units of light cloth and 1 unit of foam plates.
• The advantage of this idea is that the foam is now at the
bottom and the cloth on the sides.
• The light cloth did not absorb that much heat.
Monday, May 20, 13
6. Plan for design #1
Material Units
We will use the
material by
Foam 2 units
Putting them in
the side of the
box
Dark
Cloth
1 unit
Sherd them
and spread
them out
Monday, May 20, 13
8. Solar oven testing in the sun
Time
0 min
5 min
10 min
15 min
20 min
25 min
Tempe
rature
25
48.7
50.4
55.5
59.4
58.8
Monday, May 20, 13
9. Solar oven in the shade
Time
1 min
2 min
3 min
4 min
5min
6min
7min
Tempe
rature
41.7
36.0
34.2
32.0
30.5
Monday, May 20, 13
10. Create for design #1
• Our heat score is our solar oven maximum temperature
subtracted from the control oven: 58°c - 56° c = 3
• Our time score in the number of minutes it tuck to cool
down witch was 3 min.
• Our total impact score was 7 points.
• Our total score from the solar oven is -1.
Monday, May 20, 13
11. Improve for design #1
• The total score from our total oven was -1 points.
• The parts of our solar oven design that worked well were the foam
on the side of the box because it kept the heat from escaping the
solar oven.
• The parts of our solar oven design that did not work well were the
shreds of dark cloth did not work well because it was spread out to
much let the heat out very easily.
• We were trying to improve our heat score.
• We will improve our heat score by putting foam on the bottom and
the cloth on the sides.
Monday, May 20, 13
14. Plan for design #2
Materials Units How will you use the
material
Light
Cloth
1 unit Fold it
White
Foam
2 units Fold it
Monday, May 20, 13
15. Impact score for design
# 2
Design
#2
Reduce
Natural
or
processe
d
Reuse Recycle
Light
cloth
Foam
1 unit Possessd No Yes
2 units
Processe
d
Yes No
Tot
al
Poin
ts
5 Poin
ts
2
Poin
ts
Monday, May 20, 13
16. Solar Oven Testing in Sun
Time
0 min
5 min
10 min
15 min
20 min
25 min
30 min
Temperature
16 ° c
30.2°c
34.6°c
36.7°c
37.8°c
37.6° c
40.4° c
Monday, May 20, 13
17. Solar OvenTesting in Shade
Time
1 min
2 min
3 min
4 min
5 min
6 min
7 min
Temperature
31.5°c
26.4°c
23.0°c
21.3°c
19.8°c
18.8°c
18.0° c
Monday, May 20, 13
18. Create for design #2
• Our heat score is our solar oven maximum temperature
subtracted from the control oven: 41-41=0.
• Our time score is the number of minutes it took to cool
down witch was 4.
• Our total impact score was 7.
• Our new total score for the solar oven is -3.
Monday, May 20, 13
19. Reflection
• The solar oven that we designed only reached the temperature of
41°C and it was lower than last time so we did not improve that
much. Also we used light cloth witch did not absorb a lot of heat and
the foam was the only insulator.
• I say that our design did work. It absorbed a lot of heat but after a
few minutes the temperature would not go up and cooled down
really fast so it let the heat out and we want to prevent that from
happening.
• If we could improve our design, we would use felt and sand because
they both get hot when exposed to the sun. And they only let a little
bit of heat out. The felt is also thick and sand gets really hot like for
example in a beach.
Monday, May 20, 13
