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DESIGNING A SOLAR OVEN
By Eric Williams
Monday, May 20, 13
IMAGINE FOR DESIGN ONE
• Idea #1
• Our materials are white foam.
• We need 3 units
• The advantages of using this are that when we put it on the sides we could cover the holes in the side of the box.
• The disadvantages of using this are we could get a bad impact score.
Monday, May 20, 13
IMAGINE FOR DESIGN #1
• Idea# 2
• Our materials are foam and felt.
• We need 1unit of foam & 2 units of felt
• The advantages of felt would be the felt could hold more heat.
• The disadvantages are that felt would give us a higher impact score.
Monday, May 20, 13
Foam
Felt
Top view
Monday, May 20, 13
Tape
Foa
Felt Side view
Monday, May 20, 13
PLAN FOR DESIGN #1Material Units We will use the
materials by
Felt
Foam
1Putting it in the
conners and and the bottom of
of the box
2We will place this
on the walls of the box
Monday, May 20, 13
IMPACT SCORE FOR DESIGN #1
We will usethe materials by
Design #1 Reduce Reuse Recycle Natural or
processed Total
Foam
Felt
4 points No Yes Processed 5
1 point No No Processed 4
Our total impact score is 9 points
Monday, May 20, 13
Time Temperature
Zero minutes
Five minutes
Ten minutes
Fifteen minutes
Twenty minutes
Twenty-five minutes
25°C
32.6°C
36.3°C
38.1°C
39.9°C
40.2°C
Solar oven testing in the sun
Monday, May 20, 13
Time Temperature
One minute
Two minutes
Three minuets
Four minutes
Five minutes
Six minutes
39.9°C
39.3°C
38.1°C
37.3°C
36.2°C
35.1°C
Solar oven in the shade
Monday, May 20, 13
CREATE FOR DESIGN #1
• Our heat score is our solar oven maximum temperature subtracted from the control oven: 40 – 55 = –15
• Our time score is the number of minutes it takes to cool down witch was 6 minutes.
• Our total impact score was 9 points.
• Our total impact score was –18 points.
Monday, May 20, 13
IMPROVE FOR DESIGN #1• The total score for our first solar oven was –18 points.
• The part that worked well on our solar oven are the reflector because it did its only job witch was to reflect the light from the sun in to the box so the box could trap heat.
• The part of our solar oven that did not work well were the insulators inside the oven the reason is they let out to much heat.
• We are going to try to improve our score of –18
• We will improve our score by use better insulators this will trap more heat and give us a better score.
Monday, May 20, 13
PLAN FOR DESIGN #2
Foam
FoilCooking pot
Top view
Monday, May 20, 13
PLAN FOR DESIGN #2
FeltFoam
Side
Monday, May 20, 13
PLAN FOR DESIGN #2Materials Units How will you use
the materials
Red felt
Aluminum foil
Black foam
1 Place on the bottom
1 Place on the top
1 Shred and place on the bottom.
Monday, May 20, 13
IMPACT SCORE FOR DESIGN #2Design
#2 Reduce Reuse Recycle Natural or processed
Total point
Black foam
Red felt
Aluminum
1unit No No Processed 4
1 unit No No Processed 4
1 unit No No Processed 4
Total points 12Monday, May 20, 13
SOLAR OVEN TESTING IN SUNTime Tempeture
0 minutes
5 minutes
10 minutes
15 minutes
20 minutes
25 minutes
30 minutes
16°C
30.5°C
32.5°C
37.4°C
37.7°C
40.7°C
43.4°C
Monday, May 20, 13
SOLAR OVEN TESTING IN SHADETime ( minutes ) Temperature (°C)12345678910
30.727.725.723.219.218.918.918.918.818.8
Monday, May 20, 13
CREAT FOR DESIGN #1
• Our heat score is our solar oven's maximum temperature subtracted from the control oven : 43-41=2.
• Our time score is the number of minutes it took for our solar oven to cool down witch was 5 minutes.
• Our total impact score was 12 points.
• Our new total score for the solar oven is -5.
Monday, May 20, 13
REFLECTION• Our improved design worked well because it trapped more heat than last time. The materials we changed to using were red felt, aluminum foil and black foam. The materials were somewhat good insulators because they held some heat and let some escape and our highest temperature was 43.4°C.
• If I could improve again I would make a better choice on witch materials I used while thinking about things insulation along with environmental impact instead of one or the other because if i just think about environmental impact our box will not hold nearly as much heat as it should.
Monday, May 20, 13
