By: Lana

Designing a solar oven

Monday, May 20, 13

Imagine for Design #1Idea #1

Our materials are cloth ( to line the inside perimeter of the solar oven)rocks ( to put on the bottom of the solar oven), and Cotten ( to put in the side holes)

We need one unit for each material.

The advantages to this idea is that it will not impact the environment a lot, the food will be heather, and the materials are all good insulators.

The disadvantages are that we can only use one unit each, cloth and Cotten are not natural, and it will take longer to heat up.

Monday, May 20, 13

Imagine for Design # 2Idea #2

Our materials are rocks ( to line the bottom of the solar oven) and newspaper ( to fill the side holes and line the edge of the solar oven).

We will need 1 unit for the rocks and 2 units for the newspaper.

The advantages for this idea are that it uses less materials are used, the materials are good insulators, and will heat more quickly.

The disadvantages are that the newspaper has ink so it would be less heather.

Monday, May 20, 13

Plan for design #1Top view

Monday, May 20, 13

Plan for design #1Side view

Monday, May 20, 13

Matereal Units We will use material by

Rocks 1Placing it on the

bottom of solar oven

Cloth 1Shred and place on

the edge of the solar oven

Cotten 1 Place in side holes

and place along bottom edge of solar

oven

Plan for design #1

Monday, May 20, 13

Impact score for design #1Reduce

Natural or processed

Reuse Recycle

Cloth 1 unit+ 1

Processed - 1

reused+ 1

Can't recycle

Rocks 1 unit- 1

Natural - 1

Reused - 1

Can recycle

Cotten 1 unit+ 1

Processed+ 1

Not Reused- 1

Can recycle

Total Cloth 2Rocks - 2Cotten 2

The environmental impact score is 2

Monday, May 20, 13

Solar oven in the sunTime Temperature

O min. 25°C

5 min. 47.5°C

10 min. 49.3°C

15 min. 53.1°C

20 min. 54.9°C

Monday, May 20, 13

Solar oven in the shadeTime Solar oven temp.

1 49.8°C

2 49.8°C

3 38.5°C

4 38.5°C

5 34.3°C

6 34.3°C

Monday, May 20, 13

Creat for design #1Our heat score our solar oven maximum Temp. Subtracted from the control oven: 55 - 55 = 0.

Our time score is the number of min. It took to cool down which was 5 min.

Our total impact score was 2 points.

Our total score for the solar oven is 3 points

Monday, May 20, 13

Creat for design #2Our heat score is our solar ovens maximum temp. Subtracted from the control oven: 48°C - 41°C = 7.

Our time score is the number of Minutes it took to cool down which was 10 min.

Our total impact score was 0 points.

Our new total score for the solar oven is 17.

Monday, May 20, 13

Improve for design #1The total score for our first solar oven was 3 points.

The parts in our solar oven that worked well were rocks and Cotten because over time the rocks were hot and they helped heat the solar oven and the Cotten can spread out easily so it can trap more heat.

The parts that did not work well were cloth because the cloth was in little pieces around the box instead of layers.

We are going to try to improve our heat score

We will improve our heat score by adding more rocks because when the rocks heat up they help heat the box if we add more it might heat up more quickly.

Monday, May 20, 13

Plan for design #2Top view

Monday, May 20, 13

Plan for design #2Side view

Monday, May 20, 13

Plan for design #2Material Units

How will we use the material

Sand 1Place on the

bottom of the box.

Rocks 1Place on top of

the sand.

Cotten 1Place along the

walls.

Monday, May 20, 13

Impact score for design #2Reduce

Natural or processed

Reuse Recycle

Sand 1 unit- 1

Natural - 1

Reused- 1

Can recycle

Rocks 1 unit- 1

Natural- 1

Reused- 1

Can recycle

Cotten 1 unit+ 1

Processed + 1 not Reused

+ 1Can't

recycleTotalSand - 2Rocks - 2

Cotten 4

The environmental impact is 0

Monday, May 20, 13

Solar oven testing in the sun Time Temperature

0 min. 16°C5 min. 46.9°C10 min. 47.1°C 15 min. 47.5°C20 min. 47.5°C25 min. 47.8°C30 min. 48°C

Monday, May 20, 13

Solar oven testing in the shadeTime Temp.1 min. 47.8°C2 min. 47.8°C3 min. 47.7°C4 min. 47.4°C5 min. 47.4°C6 min. 47°C7 min. 47°C8 min. 47°C9 min. 46.7°C10 min. 47°C

Monday, May 20, 13

ReflectionOur improved solar oven did better than the original because both the sand and the rocks helped to heat the box.

The Materials that worked are sand and rocks because the sand and rocks keep heat inside themselves so they heat the box too.

The material that did not work as well is the cotton because the cotton was at the bottom of the box but, maybe if we put it higher on the box it might work better.

If we were to improve the solar oven agin we would keep the sand and rocks because they are good insulators and add 1 more unit to the rocks and put the other unit of rocks on the walls.

Monday, May 20, 13