DANIEL GONZALEZ

Designing a Solar Oven

Monday, May 20, 13

Imagine for design number one

• Idea number one

• Our materials are shredded felt, flat foam.

• We need one unit of shredded felt, and two units of flat felt.

• The advantage of this idea is both materials are good insulators and will cover the inside of the solar oven.

• The disadvantage of this idea is that the foam has a bigger impact to the environment.

Monday, May 20, 13

Imagine for design number two

• Idea number 2

• Our materials are shredded felt, flat foam.

• We need two units shredded felt, and one unit of flat foam.

• The advantage of this idea is shredded materials are better insulators so there is more shredded then flat.

• The disadvantage of this idea is we might not have enough foam for the sides of the oven.

Monday, May 20, 13

Plan for design #1

• Top view

Monday, May 20, 13

Plan for design #1

Monday, May 20, 13

Plan for design #1

Design#1

ReduceNatural

or processed

Reuse Recycle Total points

Shredded felt Units 1 Processed No No 7

Flat foam

Units 2 Processed No No 4

Total points

11is our total

points

Monday, May 20, 13

Time Temperature

0minutes 25°C

5minutes 47°C

10minutes 55.8°C

15minutes 60°C

20minutes 61.6°C

25minutes 58°C

Monday, May 20, 13

Solar oven in the shade

Time Temperature

1minute 40°C

2minute 38.8°C

3minute 37.4°C

4minute 32.5°C

5minute 31.1°C

6minute 30.9°CMonday, May 20, 13

Create for design #1

• Our heat score is our 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 4minutes

• Our total impact score was 11

• Our total score for the solar oven was 0

Monday, May 20, 13

Improve for design number one

• The total score for our first solar oven was 0points.

• The parts of our solar oven design that worked well were the shredded felt because the shredded materials are better insulator.

• The parts of our solar oven that didn't work well was the flat foam because even though its good insulator it still didn't work well

Monday, May 20, 13

Plan for design number2

• Side view

Monday, May 20, 13

Plan for design number 2

• Side view

Monday, May 20, 13

Plan for design number two

Materials UnitsHow will you use

the materials ?

Rock 1unit Placing it over the

sand

Sand 1unit Spreading

News paper 1unitPlacing in to the

sides

Monday, May 20, 13

Impact score#2

• Our impact score for rocks is -2. Our impact score for our news paper is 0. Our impact score for sand is -2. Our total impact score is -4.

Monday, May 20, 13

Impact score for design #2

Design #2 Reduce

Natural or

processed Reuse Recycle

Total points -4

Rock Unit1 Natural Yes Yes -2

Sand Unit1 Natural Yes Yes -2

Newspaper Unit1 Processed Yes Yes 0

Or total impact score is -4

Monday, May 20, 13

Solar oven testing in sun

Time Temputer

0 minutes 24.4°C

5 minutes 49.5°C

10 minutes 51.5°C

15 minutes 43.9°C

20 minutes 54°C

25 minutes 48.4°C

Monday, May 20, 13

Solar Oven Testing in the Shade

Time Temperature

1 minutes 32°C

2 minutes 31.7°C

3 minutes 31.1°C

4 minutes 39.9°C

5 minutes 31.9°C

6 minutes 30.5°CMonday, May 20, 13

Creat for design #2

• Our heat score is our solar oven maximum temperature subtracted from the control oven:54-53=1

• Out time score is the number of minutes it took to cool down which was 7minutes

• Our total impact score was -4 points

• Our new total score fore the solar oven is 14

Monday, May 20, 13

Reflection

• Our improved design worked well because the last time we got 0 and now we got 12. The materials we changed were good insulators because our temperature increased. Our materials we changed were rock, sand, and newspaper.

• If we could improve again, we will put the rocks on the bottom and then we would put the newspaper on top of the rocks. Then, we would put the sand on top of newspaper because I think the sand keeps in the heat when it gets more solar energy.

Monday, May 20, 13