Designing a solar oven

By: Mateo Vesce

Monday, May 20, 13

Imagine Design #1• Idea #1

• We are using shredded white cloth and putting it on the sides of the box. We are also using shredded white foam and putting it on the bottom of the box.

• We are using 1 unit of white cloth and 2 units of white foam.

• The advantages of this idea is that all of our materials are insulators and they are all not colored. This means that they didn't have to use ink.

• The disadvantages of this idea is that the foam is a bit far away from being a material that hurts the environment least.

Monday, May 20, 13

Imagine Design #1• Idea #2

• Our materials are shredded newspaper and putting it on the bottom of the box. We are also using shredded pipe insulation and putting it on the sides of the box.

• We need 2 units of newspaper and 1 unit of pipe insulation.

• The advantages of this idea is that the pipe insulation is thick and colored black which attracts light.

• The disadvantages of this idea is that the pipe insulation is second to last with hurting the environment.

Monday, May 20, 13

Plan Design #1Top view

Monday, May 20, 13

Plan Design #1Side view

Monday, May 20, 13

Plan Design #1

White cloth 1 unit= I sheet Shredded

White foam 2 units= 2 sheets Shredded

Monday, May 20, 13

Impact Score Design #1Design

1 Reduce NaturalProcess Reuse Recycle Total

White cloth

1 unit1 point Process Yes No 2 points

White foam

2 units4 points Process No Yes 5 points

7 points

Our total impact score is 7 pointsMonday, May 20, 13

Solar Oven Testing in the SunTime Temp

0 mins 25.0°c

5 mins 58.9° c

10 mins 65.0° c

15 mins 73.4° c

20 mins 69.4° c

25 mins 70.0° c

Monday, May 20, 13

Solar Oven in the ShadeTime Temp

1 min 59.0 c

2 mins 48.2 c

3 mins 40.3 c

4 mins 34.4 c

5 mins 32.5 c

Monday, May 20, 13

Create Design#1

• Our heat score is our solar oven maximum temperature subtracted from the control oven: 73.0 c - 55.0 c = 18.0 c

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

• Our total impact score was 7 points.

• Our total score for the solar oven is 15.

Monday, May 20, 13

Improve Design #1• The total score for our first solar oven was 15 points.

• The parts of our solar oven design that did not work well was that some of the shade from the tree was on our solar oven so next time we are staying as far away from shadows as possible.

• The parts of our solar oven design that did work well was the material we used because they were very good insulators. We knew this because our solar oven got up 73.4°c which was the hottest oven of the grade.

• We are going to try to improve our heat score.

• We will improve our heat score by getting no where near the shadows of trees.

Monday, May 20, 13

Plan Design #2Top view

Monday, May 20, 13

Plan Design #2Side view

Monday, May 20, 13

Plan Design #2

White foam 2 Shredded

Sand 1 Cup

Monday, May 20, 13

Impact Score Design #2Design

#2 Reduce Natural process Reuse Recycle Total

points

White foam

2 units4 points Process No No 7 points

Sand 1 unit1 point Natural Yes Yes -2

5 points

Monday, May 20, 13

Solar Oven Testing in SunTime Temp

0 mins 16.0°c

5 mins 34.5°c

10 mins 36.3°c

15 mins 36.7°c

20 mins 37.5°c

25 mins 38.3°c

30 mins 39.1°c

Monday, May 20, 13

Solar Oven Testing in ShadeTime Temp1 min 31.5°c

2 mins 28.6°c3 mins 26.2°c4 mins 24.7°c5 mins 23.5°c6 mins 22.6°c7 mins 22.1°c8 mins 21.7°c9 mins 21.2°c10 mins 20.8°c

Monday, May 20, 13

Create Design #2

• Our heat score is our solar oven maximum temp subtracted from the control oven: 39.0°c - 41.0 = -3.0

• Our time score is the number of mins it took to cool down which was 9 mins.

• Our total impact score was 5 points.

• Our new total score for the solar oven is 1.

Monday, May 20, 13

Reflection• Our improved design did not work well because we

changed our white cloth to sand. We know this wasn't improved because our temp dropped 40° when heating. Now we know that sand isn't a good insulator.

• If we could improve our design again, we would change our sand back to cloth because when we used cloth in our first design, it insulated more than the sand. I know this because our temperature was higher when we used the cloth.

Monday, May 20, 13