2. IMAGINE FOR DESIGN #1
• Idea #1:My group thinks that we should use river rocks to cover the
bottom of the oven so that it holds the heat that hits the bottom,
when I step on some by the lake they sometimes get super hot, we
thought foam should go on the walls because foam is one of the best
things on our list if objects to use to insulate.
• We want one cup of river rocks and two units (two sheets, like paper)
of foam.The good thing about this idea is that river rocks are
completely natural and don't hurt the environment, and the foam is
reusable.The disadvantages are that the foam takes a long time to
decompose and when we through it in a landfill it will stay there a
while.
Monday, May 20, 13
3. IMAGINE FOR DESIGN #1
• Idea #2: For this idea we think we should use felt to cover the
walls and try to contain most of the heat, and Shredded Foam
to cover the ground because it is one of the best insulators.
• We want 2 units of felt, and 1 unit of foam.The good thing Is
the felt is renewable and foam is too. But the bad part is that
they both cannot be recycled, and they both have a lot of ink
inside them, which can harm the environment.
Monday, May 20, 13
6. PLAN FOR DESIGN #1
Material Units
We will use the
material by
Foam 1
Spreading it across
the bottom
Felt 2
Covering the sides
with it
Monday, May 20, 13
7. IMPACT SCORE FOR DESIGN
#1Design
#1
Reduce
Natural or
Processed Reuse Recycle Score
Felt
2 units
Foam
1unit
2 units=
4 points
Processed
1point
No
1point
No
1point
7
1 unit=1
point
Processed
1point
No
1point
No
1point
4
Total
score
11
Monday, May 20, 13
8. SOLAR OVENTESTING INTHE
SUN
Time Temperature
0 min.
5 min.
10 min.
15 min.
20 min.
25 min.
0°c
25°c
46.2°c
66.2°c
65.6°c
71.1°c
Monday, May 20, 13
9. SOLAR OVENTESTING INTHE
SHADE
Time Temperature
1 min.
2 min.
3 min.
4 min.
5 min.
6 min.
54.2°c
44.1°c
36.9°c
32.9°c
31.6°c
30.0°c
Monday, May 20, 13
10. CREATE FOR DESIGN #1
• Our heat score is our solar ovens maximum temperature
subtracted from the control ovens maximum temperature:
72-55=17
• Our time score is the number of minutes it took to cool down
which was 4 minutes.
• Our total impact score was 11 points.
• Our total score for the solar oven is 10
Monday, May 20, 13
11. IMPROVE DESIGN #1
• The total score for our first solar oven is 10 points.
• The part of our solar oven that worked well was the foam that was inside.This
probably worked well because it was the best heat insulator in our oven.
• The part of our solar oven that did not work well was the felt. I think that because
we put thin layers on the walls and it could not contain all of the heat that came in.
• We are going to try to improve our heat score. Other solar ovens were getting a
lot higher heat scores than us.
• We think that the only way to make our heat score go up is to use two units of
Shredded foam and one shredded unit of felt.This well help because we know that
shredded things take up more space, leading to they absorb more heat.
Monday, May 20, 13
14. PLAN FOR DESIGN #2
Material Units How we will use it
Foam 2 units
To cover the
ground and be the
main insulator
Felt 1unit
To hold any thing
the foam can't any
where else
Monday, May 20, 13
15. IMPACT SCORE FOR DESIGN #2
Design
#2
Reduce
Natural
or
Processed
Reuse Recycle
Total
points
Foam
Felt
2 units, 4
points
Processed
+1 point
Has not
been used
before
+1 point
Can not
recycle
+1 point
7 points
1 unit, 1
point
Processed
+1 point
Has not
been used
before
+1 point
Can not
recycle
+1 point
4 points
We want a low score, our score is 11.
Monday, May 20, 13
16. SOLAR OVENTESTING INTHE SUN
Time Temperature
0 min.
5 min.
10 min.
15 min.
20 min.
25 min.
30 min.
16°c
54.3°c
54.3°c
54.1°c
54.5°c
54.6°c
54.8°c
Monday, May 20, 13
17. SOLAR OVENTESTING INTHE SHADE
Time Temperature
1 min.
2 min.
3 min.
4 min.
5 min.
6 min.
7 min.
8 min.
9 min.
10 min.
54.2°c
54°c
54.2°c
54°c
53.9°c
54°c
54.2°c
54.9°c
54.4°c
54.8°c
Monday, May 20, 13
18. CREATE FOR DESIGN #2
• Our heat score is our solar ovens maximum temperature
subtracted from the control oven: 55-41=14
• Our time score is the number of minutes it took to cool down
which was 10 minutes.
• Our total impact score was 11 points.
• To find the total score I add the heat score and the time score
together, and then do subtraction with that and the total impact
score.The total score is 13.
Monday, May 20, 13
19. REFLECTION
• The design we came up with to improve actually improved the oven. It
might have happened because we shredded everything in the box.We
also decreased the amount of felt and increased the amount of foam.The
foam must be the thing that helps hold and keep the heat inside the box.
• If we wanted to improve how our oven holds heat in, I would ONLY use
shredded foam because shredded things take up more space and more
insulation, and foam seems to be the best insulator. But that would affect
our score of how it affects the environment. It would give us a higher
environment score because you can not recycle foam, reuse it, it has been
produced in a factory and is not natural, and I would be using 3 units of it.
Monday, May 20, 13
