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Design a solar ovenBy: Evelyn Rojas
Monday, May 20, 13
Imagine for design #1Our materials are Cotton Balls, Foam, and Sand.
The advantages is that the sunlight will go to the sand on the bottom which will make it hot and then the cotton balls will get ht, and the foam will keep the heat inside.
The disadvantages are that the materials over heat in the solar oven then the item inside the solar oven could burn .
Monday, May 20, 13
Imagine design #2
Our materials are Sand and foil
Are advantages is that the sand and foil will heat up the box
Our disadvantages is that the foil will burn
Monday, May 20, 13
Plan design #1
Monday, May 20, 13
Plan Design #2
Top view
Monday, May 20, 13
Plan design Materials Units
Sand 1
We will use the materials
On the bottom of the box
Cotton balls 1
Foam 1
The cotton balls can go on top of the Sand
The foam can go on the onto some of the
sides
Monday, May 20, 13
Impact score for design #1Design
#1Reduce Natural or
processed Reuse Recycle
Total points
Cotton balls
Sand
Foam
1 unit Processed No No 4
1 unit Natural Yes Yes -2
1 unit Processed No Yes 2
The total points 4
Monday, May 20, 13
Solar oven temperature Time (minutes) Solar oven temperature
1
2
3
4
5
6
44.8
41.2
36.9
34.4
33.0
31.7
Monday, May 20, 13
Solar oven testing in the sun Time Temperature
0 minutes
5 minutes
10 minutes
15 minutes
20 minutes
25 minutes
25.0°c
46.9°c
47.0°c
55.3°c
46.8°c
55.6°c
Monday, May 20, 13
Create
56.0°c-55.0°= 1.0° so our heat score
4 minutes is the time score
The total impact score is 4 minutes
1 + 4 min -4= 1 so 1 is the total score
Monday, May 20, 13
Improve
The total score for our first solar oven was 1 point
The sand
Monday, May 20, 13
Plan for Design #2Design
#2Reduce
Natural or
processeReuse
Recycle or return to nature
Sand
Aluminum foil
1 unit Natural Yes Yes
2 units Processed No No
Total points 5
Monday, May 20, 13
Plan design #2 Material Units How will yo u use the
material
Sand
Aluminum foil
1 unit Flat it
2 units Cut it
Monday, May 20, 13
Impact score for design #2Design
#2Reduce Natural or
processed Reduce Recycle
Total points
Sand
Aluminum foil
I point Natural Yes Yes -2
2 points Processed No No 7
5
Total points 5
Monday, May 20, 13
Solar oven testing in sun Time Temperature
0
5
10
15
20
25
16.0
27.2
29.1
30.2
31.0
31.8
Monday, May 20, 13
Solar oven temperatureTime (minutes) Solar oven temperature
1 30.92 29.83 28.44 27.35 26.26 25.27 24.38 23.59 22.910 22.3
Monday, May 20, 13
Create for design #2Our heat score is a solar oven maximum temperature subtract from the control oven -11+5-5=5 is the total.
Our score is the number of minutes it took to cool down which was 5 minutes.
Our total impact score was 5.
New score for the solar oven is -11.
Monday, May 20, 13
ReflectionOur improved design did not work because it doesn't have a lot of heat and and the temperatures were lower the temperatures were lower because it didn't Have a lot of insulators.
If we could improve again we would put a lot of more things like more cotton, foam and sand and the temperatures are going to be more higher because its going to keep more heat in.
Monday, May 20, 13