Designing a solar ovenBy: Brooke Butler

Monday, May 20, 13

Imagine for design #1

Idea #1

Our material are felt flat and shredded cloth

We need 2 units of felt and 1 unit of cloth

An advantage would be that we would get a good insulation with the felt

A disadvantage is getting a high score on environment impact

Monday, May 20, 13

Imagining for designing #2Idea #2

Are materials are shredded foam on bottom and flat felt on sides

We need 1 unit if foam and 2 units of felt

An advantage of ore idea is that we will have better insulation then we had in the 1st idea

A disadvantage is that foam has a high amount of environmental impact

Monday, May 20, 13

Plan for design #1

Top view

Monday, May 20, 13

Plan for design #1

Side view

Monday, May 20, 13

Plan design #1

Material Units How will you use it?

Felt 2 units Keep it flat

Cloth 1 unit Shredded

Monday, May 20, 13

Impact score for design #1Design

#1 ReduceNatural

or processed

Reuse Recycle Total

Felt 4 points (2 units)

Processed(+1 point)

No (+1 point)

No(+1 point) 7 points

Cloth 1 point(1 unit)

Processed(+1 point)

Yes(-1 point)

No(+1 point) 2 points

T O T A L 9 points

Monday, May 20, 13

Solar oven testing in sunTime Temperature

O minutes 25°c

5 minutes 53.8°c

10 minutes 54.2°c

15 minutes 54.3°c

20 minutes 55.6°c

25 minutes 55.1°c

Monday, May 20, 13

Solar oven in the shadeTime Temperature

I minute 47.3°c

2 minutes 42.4°c

3 minutes 37.7°c

4 minutes 35.6°c

5 minutes 34.1°c

6 minutes 31.9°c

Monday, May 20, 13

Create for design #1

Our heat score for are solar oven maximum temperature subtracted from the control oven: 56°c - 55°c = 1

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

Our total impact score was 9 points

Are total score for are solar oven was -4

Monday, May 20, 13

Improve for #1The total score for our first solar oven was -4 points

The part of our solar oven that worked well was, our time score. our time score worked the best because it took a longer time to cool down

The part of our solar oven that did not work well was ,installation. We did not have installation that work because it was not thick

We are going to try to improve our heat score

We will improve our heat score by putting thicker installation because it was not thick

Monday, May 20, 13

Plan for design #2

Top view

Monday, May 20, 13

Plan for design #2Side view

Monday, May 20, 13

Plan design #2

Materials Units How will we use it?

Felt 1 Cut in half

Foam 2 Shred

Monday, May 20, 13

Impact score #2Design

#2 ReduceNatural

or processe

d

Reuse Recycle Total

Felt 1 point(1 unit)

Processed(+1 point)

No (+1 point)

Yes(-1 point) 4 points

Foam 4 points (2 units)

Processed(+1 point)

No (+1 point)

No (+1 point) 5 points

T O T A L 9 points

Monday, May 20, 13

Solar oven testing in the sunTime Temperature

0 minutes 16° c

5 minutes 27.6°c

10 minutes 30.3°c

15 minutes 32°c

20 minutes 33.2°c

25 minutes 34.2°c

30 minutes 35.1°cMonday, May 20, 13

Solar oven testing in shadeTime Temperature

1 minutes 27.4°c2 minutes 23.7°c3 minutes 21.1°c4 minutes 19.8°c5 minutes 18.9°c6 minutes 18.2°c7 minutes 17.8°c8 minutes 17.5°c9 minutes 17.4°c10 minutes 17.1°c

Monday, May 20, 13

Create for design #2

Our heat score is our solar oven maximum tempter subtracted from the control oven : 35-41= -6

Our time score is the number of minutes it took to cool down which was 3 minutes

Our total score impact was 9 points

Our new total score for the solar oven is -12

Monday, May 20, 13

Reflection

Our improved design did not work because we had poor insulation and we had a poor time score. The felt did not keep the heat trapped in the box because our temperature decreased.

If we could improve again, we would use 2 units of foam for the sides and, 1 unit of cloth for the bottom. We would use this because they are both good insulators and they are not the worst for the environment.

Monday, May 20, 13