Hannah soto

19
designing a solar oven By Hannah Soto Monday, May 20, 13

Transcript of Hannah soto

Page 1: Hannah soto

designing a solar ovenBy Hannah Soto

Monday, May 20, 13

Page 2: Hannah soto

Imagine for Design #1Idea #1

Our materials are foam, sand , and cotton balls.

We need one unit of each material that we use.

The advantage of this idea is that sand and cotton have a low environmental impact, and cotton and foam are really good insulators.

The disadvantage of this idea is that foam has a high environmental impact.

Monday, May 20, 13

Page 3: Hannah soto

Imagine for Design #1

Idea #2

Our materials are foam, cotton balls, and cloth.

We need one unit of each of our materials.

The advantage of this idea is cotton and cloth are good insulators and are reusable.

The disadvantage of this idea is that foam has a high environmental impact and all our materials and none recyclable.

Monday, May 20, 13

Page 4: Hannah soto

Plan for Design #1

Top view

Monday, May 20, 13

Page 5: Hannah soto

Plan for Design #1

Monday, May 20, 13

Page 6: Hannah soto

Plan for Design #1material Units We will use the

material

Cotton balls 1 Leave it normal

Foam 1 Shredded

Cloth 1 Shredded

Monday, May 20, 13

Page 7: Hannah soto

Impact score for Design#2

Design#1 Reduce Natural processed Reuse Recycle Points

Foam

Cloth

Cotton balls

1 unit Processed Yes No 4

1 unit Processed Yes No 1

1 unit Processed No Yes 2

7 pointsMonday, May 20, 13

Page 8: Hannah soto

Solar oven in the sunTime Temperature

0 min 25°c

5 min 37.9°c

10 min 41.3°c

15 min 56.6°c

20 min 59.4°c

25 min 60.3°c

Monday, May 20, 13

Page 9: Hannah soto

Solar oven s the shadeTime temperature

1 min 42.7°c

2 min 35.8°c

3 min 32.1°c

4 min 31.2°c

5 min 32.1° c

6 min 31.1°c

7 min 30.7°c

Monday, May 20, 13

Page 10: Hannah soto

Create

Our heat score is the maximum solar over temperature subtracted from the control oven: 60 - 55= 5

The time score was the number of minutes it took to cool down which was 2 minutes.

Our total score fore the solar oven was 7 points

Our total impact score was 0 points

Monday, May 20, 13

Page 11: Hannah soto

Improve for Design #1

Our total score for our first solar oven was 0 points.

The parts of our solar oven design the worked well were our insulators because they allowed the temperature to rise.

The parts of our solar oven design that did not work so well was the time due cause it took a long time to cool down.

We are going to try to improve our impact score.

We will improve our impact score b covering all the holes in our oven so the heat will not escape because if it does then there would e no heat in the oven.

Monday, May 20, 13

Page 12: Hannah soto

Plan for Design #2 Top

Monday, May 20, 13

Page 13: Hannah soto

Plan for Design #2 Side

Monday, May 20, 13

Page 14: Hannah soto

Plan for Design #2

Material UNits How will we use the material.

Foam 1 Cut into pieces

Cotton balls 1 Leave them be

Sand 1 Leave it be

Monday, May 20, 13

Page 15: Hannah soto

Impact score for Design #2

Design #1 Reduce Natural or processed Reuse Recycle Points

Foam

Sand

Cotton balls

1 Processed No Yes 2

1 Natural Yes No 4

1 Processed No No 0

Total impact 5

Monday, May 20, 13

Page 16: Hannah soto

Solar oven testing in the sun

Time Temperature 0 min 24.4°C5 min 40.7°C

10 min 47.2°C15 min 46.8°C20 min 47.3°C25 min 49.9°C30 min 47.2°C

Monday, May 20, 13

Page 17: Hannah soto

Solar oven testing in the shade

Time Temperature1 min 46.8°C2 min 47°C3 min 46.9°C4 min 46.9°C5 min 46.9°C6 min 46.4°C7 min 42.3°C8 min 72.7°C9 min 92.2°C

10 min 90.1°C

Monday, May 20, 13

Page 18: Hannah soto

Create for Design #2

Our heat score is our solar oven maximum temperature subtracted from the control oven. -3 + 10 - 6 = 1

Our time score is the number of minutes our solar oven took to cool down which was 7 minutes

Our total impact score was 6 points

Our new total score for the solar oven is 1

Monday, May 20, 13

Page 19: Hannah soto

Reflection Our improved design did not work because the materials that we changed weren't placed correctly. The materials we changed were poor insulators like the sand because it let all the heat out of our box. We changed the materials to white foam, sand, and cotton balls. We originally used yellow foam, cloth, and cotton balls.

If we could improve again we would use all yellow foam because yellow foam is a good insulator. It's a good insulator because our temperature increased.

Monday, May 20, 13