Designing a solar ovenBy

Jayce Chesworth

Monday, May 20, 13

Imagine for design #1

Idea #1

We are using shredded white cloth and putting it on the on sides and shredded foam on the bottom

We have 1 unit of cloth and two units of foam

The advantages to this are foam is a

Monday, May 20, 13

Imagine for design #1

Idea #2

We are using shredded newspaper on the bottom and shredded pipe installation on the sides.

We need 2 units of newspaper and 1 unit of pipe installation

The advantages of this idea is that the pipe installation is thick and black witch absorbs heat

The disadvantages of this idea is that the pipe installation is a harmful to the environment.

Monday, May 20, 13

Top view

Pot

Monday, May 20, 13

Side view

Monday, May 20, 13

Material UnitsWe will use the material

by.

Foam 2 unitsWe will put at the bottom of

the box

White cloth 1 unitWe will put it on the side of

the box

Monday, May 20, 13

Design #1

Reduce

Natural or

processedReuse Recycle

Total points

Shredded White cloth

ShreddedFoam

1 unit+1

Processed+1

Yes-1

No +1

2

2 units+4

Processed+1

No+1

Yes-1

5

Over all score 7Monday, May 20, 13

Temperature in the sunTime Temperature

0 minutes 25°C

5 minutes 58.9°C

10 minutes 65°c

15 minutes 73.4°c

20 minutes 69.4°c

25 minutes 70°c

30 minutes 73.5Monday, May 20, 13

Temperature in the shade

Time Temperature

1 minute

2 minutes

3 minutes

4minutes

5 minutes

59

48.2

40.3

34.4

32.5

Monday, May 20, 13

Create for design#1

Our heat score is our solar oven maximum temperature subtracted from the control oven:73°C-55°C=18°C

Our time score is the number of minutes it took to cool down

Our total impact score was 7 points

Our total score for the solar oven is 15 points

Monday, May 20, 13

Improve for design#1

The total score for our solar oven was 15 points.

The parts of our solar oven design that worked well were flat foil because it reflected the light good.

The parts of our solar oven design that did not work well was the inside because we were near the shade.

We are going to try to improve our heat score.

We will improve our heat score by using better insulators.

Monday, May 20, 13

Plan for design #2Top view

Monday, May 20, 13

Side view

Monday, May 20, 13

Plan for design#2

Material UnitsHow will you

use the material?

Foam

Sand

2Put it at the bottom and the sides

1Put it around

the pot

Monday, May 20, 13

Impact score for design #2

Design #2

Reduce Natural or processed Reuse Recycle

Total score

Foam

Sand

2 units 4 points

Processed1point

No 1point

No1point

7points

1 unit1point

Natural-1point

Yes-1point

Yes-1point

-2points

Over all score is five pointsMonday, May 20, 13

Solar oven testing in the sun

Time Temperature

O minutes 16.0°C

5 minutes 34.5°C

10 minutes 36.3°C

15 minutes 36.7°C

20 minutes 37.5°C

25 minutes 38.3°C

30 minutes 39.1°C

Monday, May 20, 13

Solar oven testing in the shadeTime Temperature

1 minute 31.5°C2 minutes 28.6°C3 minutes 26.2°C4 minutes 24.2°C5 minutes 23.5°C6 minutes 22.6°C7 minutes 22.1°C8 minutes 21.7°C9 minutes 21.2°C10 minutes 20.8°C

Monday, May 20, 13

Create for design #2

Our heat score is our solar ovens maximum temperature subtracted from the control oven:39.0°C-41.0°C=-3.0°C

Our time score is the number of minutes it took to cool down witch was 8minutes

Our total Impact score was 5 points

Our new total score for the solar oven is 1

Monday, May 20, 13

ReflectionOur improved design did not work because the sand was not a good insulator. When we had cloth, it held in the heat but the sand did not trap much heat inside the oven. We know this because our highest score with sand was 39.1°C and our highest with cloth is 73.5°C.

If we were to improve our design again I would take the sand out and put the cloth back in because it held in a lot of heat.

Monday, May 20, 13