This document describes Daniel Gonzalez's process of designing and testing two solar oven designs. The first design used shredded felt and flat foam as insulating materials. It performed poorly with a total score of 0. The second design used rocks on the bottom, sand in the middle, and newspaper on the sides. It performed better with a total score of 14. Daniel reflects that using better insulating materials like rocks and sand helped increase the oven's temperature. For future improvement, he suggests placing rocks on the bottom, newspaper above that, and sand on top to better retain heat from solar energy.

1. DANIEL GONZALEZ
Designing a Solar Oven
Monday, May 20, 13

2. Imagine for design number one
• Idea number one
• Our materials are shredded felt, flat foam.
• We need one unit of shredded felt, and two units of flat
felt.
• The advantage of this idea is both materials are good
insulators and will cover the inside of the solar oven.
• The disadvantage of this idea is that the foam has a bigger
impact to the environment.
Monday, May 20, 13

3. Imagine for design number two
• Idea number 2
• Our materials are shredded felt, flat foam.
• We need two units shredded felt, and one unit of flat
foam.
• The advantage of this idea is shredded materials are better
insulators so there is more shredded then flat.
• The disadvantage of this idea is we might not have
enough foam for the sides of the oven.
Monday, May 20, 13

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

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

6. Plan for design #1
Design#
1
Reduce
Natural
or
processed
Reuse Recycle
Total
points
Shredded
felt
Units 1 Processed No No 7
Flat
foam
Units 2 Processed No No 4
Total
points
11is our
total
points
Monday, May 20, 13

7. Time Temperature
0minutes 25°C
5minutes 47°C
10minutes 55.8°C
15minutes 60°C
20minutes 61.6°C
25minutes 58°C
Monday, May 20, 13

8. Solar oven in the shade
Time Temperature
1minute 40°C
2minute 38.8°C
3minute 37.4°C
4minute 32.5°C
5minute 31.1°C
6minute 30.9°C
Monday, May 20, 13

9. Create for design #1
• Our heat score is our solar oven maximum temperature
subtracted from the control oven:62°C-55°C=7°C
• Our time score is the number of minutes it took to cool
down which was 4minutes
• Our total impact score was 11
• Our total score for the solar oven was 0
Monday, May 20, 13

10. Improve for design number one
• The total score for our first solar oven was 0points.
• The parts of our solar oven design that worked well were
the shredded felt because the shredded materials are better
insulator.
• The parts of our solar oven that didn't work well was the
flat foam because even though its good insulator it still
didn't work well
Monday, May 20, 13

11. Plan for design number2
• Side view
Monday, May 20, 13

12. Plan for design number 2
• Side view
Monday, May 20, 13

13. Plan for design number two
Materials Units
How will you use
the materials ?
Rock 1unit
Placing it over the
sand
Sand 1unit Spreading
News paper 1unit
Placing in to the
sides
Monday, May 20, 13

14. Impact score#2
• Our impact score for rocks is -2. Our impact score for our
news paper is 0. Our impact score for sand is -2. Our total
impact score is -4.
Monday, May 20, 13

15. Impact score for design #2
Design
#2
Reduce
Natural
or
processed
Reuse Recycle
Total
points -4
Rock Unit1 Natural Yes Yes -2
Sand Unit1 Natural Yes Yes -2
Newspaper Unit1 Processed Yes Yes 0
Or total impact score is -4
Monday, May 20, 13

16. Solar oven testing in sun
Time Temputer
0 minutes 24.4°C
5 minutes 49.5°C
10 minutes 51.5°C
15 minutes 43.9°C
20 minutes 54°C
25 minutes 48.4°C
Monday, May 20, 13

17. Solar Oven Testing in the Shade
Time Temperature
1 minutes 32°C
2 minutes 31.7°C
3 minutes 31.1°C
4 minutes 39.9°C
5 minutes 31.9°C
6 minutes 30.5°C
Monday, May 20, 13

18. Creat for design #2
• Our heat score is our solar oven maximum temperature
subtracted from the control oven:54-53=1
• Out time score is the number of minutes it took to cool
down which was 7minutes
• Our total impact score was -4 points
• Our new total score fore the solar oven is 14
Monday, May 20, 13

19. Reflection
• Our improved design worked well because the last time we
got 0 and now we got 12. The materials we changed were
good insulators because our temperature increased. Our
materials we changed were rock, sand, and newspaper.
• If we could improve again, we will put the rocks on the
bottom and then we would put the newspaper on top of
the rocks. Then, we would put the sand on top of
newspaper because I think the sand keeps in the heat
when it gets more solar energy.
Monday, May 20, 13