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