The document describes two designs for a solar oven. Design 1 uses cotton, newspaper, and cloth with a total impact score of 6 points. It reached a maximum temperature of 60°C but cooled down within 3 minutes for a total score of 2 points. Design 2 replaces the newspaper with foam and uses two layers of cotton with an impact score of 11 points. It reached a maximum of 52°C but cooled within 3 minutes for a total score of -9 points. The reflection indicates that the materials in the second design did not insulate heat well, so different materials would need to be used for any future improved designs.

1. Designing a Solar Oven
By: Diana Alvarez
Monday, May 20, 13

2. Imagine for design #1
Idea #1
Our materials are cotton to put it on the side, we will use news
paper for the bottom, and we will also use with cloth to put it on
the other side.
We need 1 unit for cloth, 1 unit for news paper and 1 unit for cotton
The advantage of this idea is that it will warm up a little bit faster
with does materials. The materials we use are not going to hurt the
environment.
The disadvantage was that it will probably not heat to much.
Monday, May 20, 13

3. Imagine for design #1
Idea #2
Our materials are foam to put them on the bottom and we
will also put and we will use cotton to put them on both sides
We need 1 unit of foam and we also need 2 units of cotton
The advantage is that it is going the heat up faster because of
the materials we have
The disadvantage is that the materials we are going to sue will
hurt more the environment then the other materials.
Monday, May 20, 13

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

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

6. Plan for design #1
Materials Units
We will use the
material by
Cotton 1
We will use this
material by putting it on
the inside and putting it
flat on the side
News paper 1
Cloth 1
Monday, May 20, 13

7. Impact score for design #1Design
1
Reduce
Natural
or
processed
Reuse Recycle
Add
points
Cotton
unit 1
1 unit Processed No No 4 points
White
cloth
unit 1
1 unit Processed Yes No 2 points
News paper
unit 1 1 unit Processed Yes Yes 0 points
Our total impact score is 6 points
Monday, May 20, 13

8. Solar oven testing the sun
#1
Time
0 min. 25 °c
5 min. 44.7 °c
10 min. 46.3 °c
15 min. 49.4 °c
20 min. 59.7 °c
25 min. 54.9 °c
Monday, May 20, 13

9. Solar oven testing in the sun
Time ( minutes) Solar oven temperature
1 39.9 ° c
2 36.3 °c
3 43.0 °
4 33.1 °c
5 32.3 °c
6 31.0 °c
7
8
9
10
Monday, May 20, 13

10. Create for design #1
Our heat score is our solar oven maximum temperature
subtracted from the control oven: 60° c - 55= 5
Our time score is the number of minutes it took to cool
down which was 3 minutes.
Our total score was 6 points
Our total score for the solar oven is 2
Monday, May 20, 13

11. Improve for design #1
The total score for our first solar oven was 2 points
The parts of our solar oven design that did worked well were cotton
and cloth because it helped it heat faster.
The parts of our solar oven design that Did not work well were the
news paper because it did not helped to heat it faster
We are going to try to improve our heat, time and impact in score
We will improve our heat, time and impact score by using different
materials like dark cloth, foam and cotton because it will help gat a
high score
Monday, May 20, 13

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

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

14. Plan for design #2
Materials Units
How will you
use the
materials?
Cotton. 2 units
We are going to
put it on two
sides of the box
Foam 1 unit
We are going to
put it on the
bottom of the
box
Monday, May 20, 13

15. Impact score for design #2
11 pints in total
Design
#2
Reduce
Natural or
processed
Reuse Recycle
Total
points
Cotton 2 units Processed No No 7 points
Foam 1 unit Processed No No 4 points
Monday, May 20, 13

16. Solar oven testing in sun
Time Temperature
0 minutes 24.4 °c
5 minutes 41.2°c
10 minutes 42.0°c
15 minutes 44.0°c
20 minutes 50.1°c
25 minutes 52.1°c
30 minutes 47.9°c
Monday, May 20, 13

17. Solar oven testing in shade
Time Temperature
1 minute 40.6°c
2 Minute 34.5°c
3 minute 31.1°c
4 minute 29.9°c
5 minute 28.5°c
6 minute 29.1°c
7 minute 27.6°c
8 minute 27.1°c
9 minute 27.0°c
10 minute 27.0° c
Monday, May 20, 13

18. Create for design #2
Our heat score is our solar oven maximum temperature
subtracted from the control oven: Heat score 52-53= -1
Our time score is the number of minutes it took to cool
down which was Time score= 3 minutes
Our total impact score was 11
Our new total. Score for the solar oven is -1 + 3= -9
Monday, May 20, 13

19. Reflection
Our improve design did not work well because the materials we
used didn't keep that much the heat inside.
The materials we changed were news paper and cloth and the news
paper was replaced by foam and cloth was replaced by cotton
The materials were bad insulators because the foam did not help
heat up the solar oven and the cotton also did not help worm up the
solar oven, the materials did not help keep the heat inside the solar
oven
If we would improve again we would change the materials because I
don't think the material are good insulators.
Monday, May 20, 13