DESIGNING A SOLAR OVEN

By: Burhanuddin Akbari

Monday, May 20, 13

IMAGINE FOR DESIGN #1• Idea #1

• Our materials were shredded felt and flat foam.

• We needed 1 sheet of felt that we shredded and 2 sheets of foam.

• The advantages of this idea is that both of the materials are good insulators. Also these materials cover all of the solar oven.

• Some disadvantages are that the foam has a large impact on the environment.

Monday, May 20, 13

IMAGINE FOR DESIGN #1

• Idea #2

• Our materials are the same shredded felt and flat foam.

• The units we need are different. We need 2 sheets of felt that we will shred, and 1 sheet of foam.

• The advantages are that shredded materials are better insulators and there is more shredded then flat.

• The disadvantages are that we might not have enough foam to cover the sides of the solar oven.

Monday, May 20, 13

PLAN DESIGN #1Top

Monday, May 20, 13

Side View

PLAN DESIGN #1

Monday, May 20, 13

PLAN FOR DESIGN #1

Material Units We will use the material by

Felt 1 Units We will shred it and put it on the bottom.

Foam 2 UnitsWe will put it on the

edges of the solar oven.

Monday, May 20, 13

IMPACT SCORE FOR DESIGN #1

Design #1 Reduce

Natural or

ProcessedReuse Recycle Total

Score

Felt

Foam1

1 Sheet1 Point

Processed 1 Point

No1 Point

No1 Point 4 Points

2 Sheet4 Point

Processed 1 Point

No1 Point

No1 Point 7 Points

Monday, May 20, 13

SOLAR OVEN TESTING IN THE SUNTime Temperature

0 Minutes

5 Minutes

10 Minutes

15 Minutes

20 Minutes

25 Minutes

25°C

47°C

55.8°C

60°C

61.6°C

58°C

Monday, May 20, 13

SOLAR OVEN IN THE SHADETime Temperature

1 Minute

2 Minutes

3 Minutes

4 Minutes

5 Minutes

6 Minutes

40°C

38.8°C

37.4°C

32.5°C

31.1°C

30.9°C

Monday, May 20, 13

CREATE FOR DESIGN #1

• Our heat score is the solar oven maximum temperature subtracted from the control oven: 62°C-55°C=7°C

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

• Our total impact score was 11.

• Our total solar oven score was 0.

Monday, May 20, 13

IMPROVE FOR DESIGN #1• The total score for our first solar oven was 0 points.

• The parts of our solar oven that worked well were the insulation because we used shredded materials that are good insulators.

• The parts of our solar oven that didn't work well was that our impact score was too high because we used materials that weren't recyclable and weren't reused.

• We will improve our impact score by using materials that are don't hurt the environment.

Monday, May 20, 13

PLAN FOR DESIGN #2

Top ViewMonday, May 20, 13

PLAN FOR DESIGN #2

Side ViewMonday, May 20, 13

PLAN FOR DESIGN #2

Material Units How will you use this material

Sand

Rocks

Newspaper

1 Cover the bottom of the solar oven.

1 Cover the bottom of the solar oven.

1 Put it on the sides of the solar oven.

Monday, May 20, 13

IMPACT SCORE FOR DESIGN #2Design

#2 Reduce Natural or Processed Reuse Recycle Total

Sand

Rocks

News paper

1 unit1 point

Natural-1 point

Yes-1 point

Yes-1 point -2

1 unit1 point

Natural-1 point

Yes-1 point

Yes-1 point -2

1 unit1 point

Processed1 point

Yes-1 point

Yes-1 point 0

Monday, May 20, 13

SOLAR OVEN TESTING IN SUNTime Temperature

0 minutes

5 minutes

10 minutes

15 minutes

20 minutes

25 minutes

30 minutes

16°C

30.2°C

33.6°C

36.1°C

34.1°C

37.3°C

37.4°C

Monday, May 20, 13

SOLAR OVEN TESTING IN SHADETime Temperature

1 minutes

2 minute

3 minutes

4 minutes

5 minutes

6 minutes

7 minutes

28.6°C

26°C

24°C

22°C

21°C

20.5°C

20.3°CMonday, May 20, 13

CREATE FOR DESIGN #2

• Our heat is our solar oven maximum temperature subtracted from the control oven: 37°-41°=-4°C.

• Our times score is the minutes it took to cool down which was 5 minutes.

• Our total impact score was -4 points.

• Our new total score for the solar oven is 5 points.

Monday, May 20, 13

REFLECTION• Our improved design worked because our total score went up 5 points due to a low impact score on the environment. The materials we changed were from foam and felt to sand, rocks, and newspaper. However, the materials were poor insulators because it didn't trap much heat in. Our temperature decreased and the temperature didn't get higher then the control temperature.

• If we could improve again we would put a better insulator instead of rocks, sand and newspaper because the temperature didn't get very high. We would want to make the temperature go up.

Monday, May 20, 13