Designing a Solar OvenBy:Hayden

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Monday, May 20, 13

Imagine for Design #1• Idea #1

• Our materials are dark cloth to absorb heat and Cotton balls it insulate the heat

• We need 1 unit of dark cloth=1sheet and 2 units of cotton balls=2cups

• The advantage of this idea is that dark cloth would b good to absorb the heat and make the box.

• The disadvantage of the materials is that we might not have enough Cotten balls for the experiment

Monday, May 20, 13

Imagine for design #2• Idea #2

• Our materials are white colored cloth and the green colored foam

• We need 1 unit of white colored cloth= 1sheet and 2units of green colored cloth=2sheets

• The advantage of this idea is that the white colored cloth will insulate the heat and the green foam is a little dark so it will absorb the heat

• The disadvantage is they the white colored cloth may not insulate the heat as much as we want

Monday, May 20, 13

Plan for design #1• Top view

Monday, May 20, 13

Plan for design #1

• Side view

Monday, May 20, 13

Plan for design #1Materials Units We will use the

material

Cotton balls 2 units

Tape them and smash them to

have more space to cover

Black cloth 1 unitPlace on

bottom and to absorb heat

Monday, May 20, 13

Impact score for design #1Design

#1 Reduce Natural or processed Reuse Recycle Total

Points

Cotton balls

Black cloth

3 units Processed No No 7 points

1 unit Processed Yes No 2 points

Our total impact score is 9 pointsMonday, May 20, 13

Solar oven testing in the sunTime Tempeture

0 minutes 25°C

5 minutes 52.4°C

10 minutes 52°C

15 minutes 54°C

20 minutes 55.7°C

25 minutes 54.6°C

Monday, May 20, 13

Solar oven testing in the shade

Time Tempeture

1 minutes 47.7°C

2 minutes 41.9°C

3 minutes 36.7°C

4 minutes 34.8°C

5minutes 32.7°C

6 minutes 31°CMonday, May 20, 13

Create for deign #1• Our heat score is our solar oven maximum

temperature subtracted from the control oven 56°C-55=1

• Our time score is the number of minutes it took to cool down which was 4 minutes

• Our total impact score was 9

• Our total score for the solar oven is -4

Monday, May 20, 13

Improve for design #1• The total score for our solar oven design was -4

• The parts of our solar oven design that worked well were the black cloth because it absorbed a lot of heat that we wanted to

• The parts of our solar oven design that did not work well were the cotton balls because they didn't insulate the heat like we wanted to

• We will improve our heat score by have some dark foam because those dark colors will absorb more heat and also but felt on the bottom

Monday, May 20, 13

Plan for design #2

• Side view

Monday, May 20, 13

Plan for design #2

• Top view

Monday, May 20, 13

Plan for design #2Materials Units

How will we use the material

Felt 1 sheet We will leave it flat

Colored foam 1 sheet We will leave it flat

Black foam 1 sheet We will leave it flat

Monday, May 20, 13

Impact score for design #2Design#

2 ReduceNatural

OrProcessed

Reuse Recycle Total points

Felt

Colored foam

Black foam

1 unit Processed No No 4 points

1 unit Processed No Yes 2 points

1 unit Processed No No 4 points

Our total impact score is 10 pointsMonday, May 20, 13

Solar oven design#2 the sun

Time Tempeture

0 minutes 16°C

5 minutes 25.9°C

10 minutes 27.9°C

15 minutes 28.5°C

20 minutes 30.3°C

25 minutes 39.1°C

30 minutes 40.4°CMonday, May 20, 13

Solar oven in the shade design #2

Time Tempeture1 minute 31.9°C2 minutes 26°C3 minutes 23°C4 minutes 21°C5 minutes 19.7°C6 minutes 18.8°C7 minutes 18.2°C8 minutes 17.7°C9 minutes 17.3°C10 minutes 17.1°C

Monday, May 20, 13

Create for design #2• Our heat score is our solar oven maximum

temperature subtracted from the control oven: 40°C - 41°C= -1

• Our time score is the number of minutes it took to cool down witch was 4 minutes

• Our total impact score was 10 points

• Our new total score is -7 points

Monday, May 20, 13

Reflection• Our improved design did not work because the

green foam did not insulate enough. The black foam did not keep the heat in the heat as we thought because dark colors absorb heat, so we thought that it would hold it in.

• If we could improve again, we would get newspaper to insulate the heat and take out the black foam and the green foam and keep the red felt. The newspaper will go on the sides and a little bit on the outside of the felt while the felt is in the middle.

Monday, May 20, 13