2. Imagine for design #1
ā¢ Idea 1
ā¢ Our materials are white foam ļ¬at.
ā¢ We need 3 units of white foam ļ¬at.
ā¢ The advantages of this idea is that when we put it on the
sides we could cover the holes that the box has except the
box where the terminator goes so we can trap heat.
ā¢ The disadvantages of this idea is we could get a higher
impact score.
Monday, May 20, 13
3. Imagine for design #2
ā¢ Idea 2
ā¢ Our materials are felt ļ¬at and foam ļ¬at
ā¢ We need 2 units for felt ļ¬at and 1 unit for foam ļ¬at
ā¢ The advantages are the felt would hold more heat.
ā¢ The disadvantages would be that the felt might not get
that much heat and get a higher impact score.
Monday, May 20, 13
4. Plan for design #1
Top view
Brown=
foam
The white foam is cut
To make them ļ¬t some
Holes the solar oven
May have
Monday, May 20, 13
6. Materials Unit
We will use the
materials by
Foam
Felt
1 unit Flat
2 unit Flat
Plan for design #1
Monday, May 20, 13
7. Design 1 Reduce
Natural
or
processd
Reuse Recycle
Total
points
Foam 2 units Processd No Yes 5
Felt 1 units Processed No No 4
Impact score for deign #1
Monday, May 20, 13
8. Time Temperature
0 min
5 min
10 min
15 min
20 min
25 min c
25Ā° c
32.6Ā° c
36.3Ā° c
38.1Ā° c
39.9Ā° c
40.2Ā° c
Solar oven testing
Monday, May 20, 13
9. Solar oven n the shade
Time Tempeture
1 min
2 min
3 min
4 min
5 min
6 min
39.9 Ā° c
39.3 Ā° c
38.1 Ā° c
37.3 Ā° c
36.2 Ā° c
35.1 Ā° c
Monday, May 20, 13
10. Create for design #1
ā¢ Our heat score is our solar oven maximum temperature
subtracted from the oven control: 40-55=-15
ā¢ Our time score is the number of minutes it took to cool
down which was 6 minutes.
ā¢ Our total impact score was 9 points.
ā¢ Our total score for the solar oven was -18.
Monday, May 20, 13
11. Improve for design #1
ā¢ The total score for our ļ¬rst solar system oven was 18
ā¢ The parts of our solar oven that worked well was the aluminum
foil because the aluminum reļ¬ected the heat to the box.
ā¢ The part of the solar oven that did not work was the foam
because we thought the foam would hold the heat but the foam
did not hold heat.
ā¢ We are going to try to improve our heat and impact score
ā¢ We are going to improve impact and heat by using items that
are recycled and we could use items that observes heat.
Monday, May 20, 13
16. Time Tempeture
0 min
5 min
10 min
15 min
20 min
25 min
30 min
24.4Ā° c
46.2Ā° c
43.9Ā° c
37.8Ā° c
40.9Ā° c
42.7Ā° c
37.6Ā° c
Solar oven testing in the sun
Monday, May 20, 13
17. Temperature Time
29.7Ā° c 1 min
29.2Ā° c 2 min
28.2Ā° c 3 min
27.9Ā° c 4 min
27.7Ā° c 5 min
27.1Ā° c 6 min
26.0Ā° c 7 min
25.3Ā° c 8 min
25.4Ā° c 9 min
25.4Ā° c 10 min
Monday, May 20, 13
18. Design #2 create
ā¢ Our heat score is our solar oven maximum temperature
subtracted from the control oven: 44-53=-9
ā¢ Our time score is the number of minutes it took to cool
which was 2 minutes.
ā¢ Our impact score is 22 points.
ā¢ Our new total score for the solar oven is -19.
Monday, May 20, 13
19. Reļ¬ectionā¢ Our improved design did not work well because in our ļ¬rst score we got
-18 and in our second score we got -19 and we thought our new materials
would make a better insulator than our other materials.
ā¢ The materials we changed where white foam to black foam and we added
aluminum.
ā¢ Our materials worked poorly because when we put our aluminum we put it
on each of the sides, and we just spread out the black foam all around the
side of the felt and with the felt we just put all around the ļ¬oor of the box.
So I think that when it spread out the black foam did not get much sunlight
because when we spread it out around the felt not much sun light could get
to the black foam.
ā¢ If could improve again we would shred our materials, because when we put
materials in the cooler shred was a better insulator. We would also place
our aluminum where the light reļ¬ects to hold more heat in the black foam.
We would also put our black foam where it would get more sunlight.
Monday, May 20, 13
