The document describes two designs for a solar oven. Design 1 used cotton, rocks, and cloth and scored 3 points. Design 2 replaced the cloth with sand to better trap heat. It reached a maximum temperature of 87°C and scored 44 points, demonstrating an improvement over the first design. The second design worked better because the sand insulated the heat well inside the oven.

1. Designing a solar oven
By:Aubrey Young
Monday, May 20, 13

2. Imagine for design #1
For our materials we will use 1 unit of Cotten,1
unit of rocks,1 unit of cloth
Some advantages of this Idea is that it is less of
an impact on the environment
Some disadvantages of this idea is it will take
longer to heat up, cloth and Cotten are not
natural, we can only use one unit each
Monday, May 20, 13

3. Imagine for design #2
We used 1 unit of rocks,2 units of news paper
Some advantage to this idea is use less
material,less impact on environment,good
insulator, and it heats faster
Some disadvantages is the news paper has
ink,less heather,and it is more toxic
Monday, May 20, 13

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

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

6. Material Units
We will use
material by
Rocks 1
Placing it on
the bottom of
solar oven.
Cloth 1
Use to trap
and instate
heat.
Cotten 1
Use to instate
heat.
Plan for design#1
Monday, May 20, 13

7. Impact score on design #1
Material Reduce Natural Reuse Recycle Points
Cloth 1 unit
+1
Processe
d
-1
Reused
+1
No
2
Rocks 1 unit
-1
Natural
-1
Reused
-1
Yes
-2
Cotten 1 unit
+1
Processe
d
+1
Not
reused
-1
Yes
2
2
Monday, May 20, 13

8. Solar oven testing in the sun
Time Tempeture
0 min 25°C
5 min 47.5°C
10 min 49.3°C
15 min 53.1°C
20 min 54.9°C
Monday, May 20, 13

9. Solar oven in the shade
Time Tempture
1 49.8°C
2 49.8°C
3 38.5°C
4 38.5°C
5 34.3°C
6 34.3°C
Monday, May 20, 13

10. Create for design #1
Our heat score is our solar oven maximum
temperature subtracted from the control oven:
55-55=0
Our time score is the number of minutes it took to
cool down witch was 5 minutes
Our total impact score was 2 points
Our total score for the solar oven is 3 points
Monday, May 20, 13

11. Improve for design #1
The total score for our first dolor oven was 3 points
The parts of our solar oven that worked well were the rocks
one Cotten because over time the rocks heat up and help
heat the box and the Cotten is spread so it keeps more heat
The cloth did not work as well cause it keep falling
We are going to try to improve our score heat score
We will improve our heat score by removing the cloth and
adding sand because it traps the heat
Monday, May 20, 13

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

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

14. Plan for design #2
Materials Units
How will we use
the materials
Sand 1 Unit Place on bottom
Cotten 1 Unit
Sherd and put
on edge of box
Rocks 1 Unit
Place on top of
sand
Monday, May 20, 13

15. Impact score for design #2
Design
2
Reduce
Natural or
processed
Reuse Recycle Points
Sand 1 Unit
-1
natural
-1 yes -1 yes -2
Rocks 1 Unit
-1
natural
-1 yes -1 yes -2
Cotten 1 Unit
+1
processed
+1 no +1 no 4
Total
points
0
points
Monday, May 20, 13

16. Solar oven testing in the sun
Time Temperature
0 min 24.4°C
5 min 42.9°C
10 min 65.5°C
15 min 86.5°C
20 min 45.9°C
25 min 49.5°C
30 min 42.2°C
Monday, May 20, 13

17. Solar oven testing in the shade
Time Temperature
1 min 34.5°C
2 min 36.7°C
3 min 36.4°C
4 min 36.2°C
5 min 35.5°C
6 min 34.6°C
7 min 34.4°C
8 min 33.9°C
9 min 32.7°C
10 min 30.9°C
Monday, May 20, 13

18. Create for design #2
Our heat score is our solar oven maximum
temperature subtracted from the control oven:
87-53=34
Our time score is the number of minutes it took to
cool down witch was 10 minutes
Our total impact score was 0 points
Our total score for the solar oven is 44 points
Monday, May 20, 13

19. Reflection
Our improved design worked well because the
materials that we used trapped the heat really well.
We know this because the temperature increased.
The material we changed was sand. The sand was a
good insulator because It kept the heat in the box.
If we could improve again we would not change
anything because with the shredded stuff we have
in there like the cotton takes up more space to
trap in the heat.
Monday, May 20, 13