Designing a solar ovenBy: Jade Teeuwen

Imagine for design #1

• Idea # 1

• Our materials are sand,cotton balls,and foam

• We needed 1,1, and 1 for our units

• The advantages were the temperature was very good

because the sand was very hot from the suns light hitting

the aluminum and it reflecting into the box.

• A disadvantage from our plan was that some of the cotton

balls were taking up a lot of room so that's why we are

going to remove them.

Imagine for design # 1• Idea #2

• Our materials are sand and felt

• Total score is 4 points

• We need units 2, and 1

• The advantage of this idea is that we can cover the whole box in

aluminum foil and put sand and rocks on the bottom and the suns light

will attract to the aluminum foil which will make the box hot and the

temperature will be high

• The disadvantage of this idea is idea is if It doesn't attract to the

aluminum because the sand is taking up to much room but the suns light

can still attract to the sand.

Plan

• Top view

Plan for design #1

• Side view

Plan for design #1

Materials UnitsWe will use the

material by

Sand 1We will put the

sand on the bottom.

Cotton balls 1We will put the cotton balls on top of the sand.

Foam 1The foam will go

all around the sides of the box.

Impact score for design #1

Design #1Natural process

Reuse RecycleTotal score

Cotton balls

1 point

Yes or no +1

Yes or no No +1

Yes or no No +1

= 4 points

Sand 1 point

Yes or no No -1

Yes or no No -1

Yes or no No -1

= -2 points

Foam 1 point

Yes or no yes +1

Yes or no No +1

Yes or no yes -1

2 points

• Total score is 4 points

Solar oven in the sunTime Temperature

0 minutes 25.0°c

5 minutes 46.9°c

10 minutes 47.0°c

15 minutes 55.3°c

20 minutes 46.8° c

25 minutes 55.6°c

Solar oven in the shadeTime Temperature

1 44.8 °c

2 41.2°c

3 36.9°c

4 34.4°c

5 33.0°c

6 31.7°c

Create for design #1

• Our heat score is our solar ovens maximum

temperature subtracted from the controlled oven

56.0 - 55.0 = 1.0.

• Our time score is the total minutes it took to cool

down which was 4 minutes.

• Our total impact score was 4 points.

• Our new total impact score for the solar oven is 1

Improve for design #1

• Our total score for design #1 was 1 the parts that

worked well were the sand and the aluminum the

sand got really hot from the suns light reflecting off

the aluminum lid and into the box which was good for

the temperature. The parts that didn't work so well

were the foam and the cotton balls the cotton balls

were taking up a little to much room and they didn't

get so hot.

Designing a solar oven #2• Top view

Plan for design #2

Plan for design #2

Material UnitsHow will you

use the material?

Aluminum 2 unitsPut on all of

the sides

Sand 1 unit

Put on top of the aluminum on the bottom

of the box

Impact score for design #2

Design #2

Reduce

Natural or

processed

Reuse Recycle Total

Aluminum 2 units

1 pointNatural -1 point

Yes -1 point

Yes -1 point

-2 points

Sand 1 unit

4 pointsProcess

ed +1 point

No +1 point

No +1 point

7 points

Solar oven testing in the sunTime Temperature

0 minutes 16.0

5 minutes 27.2

10 minutes 29.1

15 minutes 30.2

20 minutes 31.0

25 minutes 31.8

30 minutes 32.1

Solar oven testing in the shade

Time Temperature

1 minute 30.9

2 minutes 29.8

3 minutes 28.4

4 minutes 27.3

5 minutes 26.2

6 minutes 25.2

7 minutes 24.3

8 minutes 23.5

9 minutes 22.9

10 minutes 22.3

Create for design #2

• Our heat score is our solar ovens maximum

temperature subtracted from the controlled oven

32-41= -11

• Our time score is the number of minutes it took to

cool down which was 5 minutes

• Our total impact score was 5

• Our new total score for the solar oven is -11

Reflection

• Our design did not work well because our solar oven did not

have enough heat because our conductors (sand and

aluminum foil) was letting all of the heat out. It did not get

high scores which affected our other scores. We need to put

better insulators in our box like foam and felt.

• If we could improve our design I would put a lot of shredded

foam in the box and a little bit of sand. Shredded Foam is a

good insulator because shredded foam does not allow heat to

pass through the object which means that it will keep all of

the heat inside the box which will bring up our score.