Post on 06-Jul-2015
Designing a solar ovenBy: Jade Teeuwen
Imagine for design #1
• Idea # 1
• Our materials are sand,cotton balls,and foam
• We needed 1,1, and 1 for our units
• The advantages were the temperature was very good
because the sand was very hot from the suns light hitting
the aluminum and it reflecting into the box.
• A disadvantage from our plan was that some of the cotton
balls were taking up a lot of room so that's why we are
going to remove them.
Imagine for design # 1• Idea #2
• Our materials are sand and felt
• Total score is 4 points
• We need units 2, and 1
• The advantage of this idea is that we can cover the whole box in
aluminum foil and put sand and rocks on the bottom and the suns light
will attract to the aluminum foil which will make the box hot and the
temperature will be high
• The disadvantage of this idea is idea is if It doesn't attract to the
aluminum because the sand is taking up to much room but the suns light
can still attract to the sand.
Plan
• Top view
Plan for design #1
• Side view
Plan for design #1
Materials UnitsWe will use the
material by
Sand 1We will put the
sand on the bottom.
Cotton balls 1We will put the cotton balls on top of the sand.
Foam 1The foam will go
all around the sides of the box.
Impact score for design #1
Design #1Natural process
Reuse RecycleTotal score
Cotton balls
1 point
Yes or no +1
Yes or no No +1
Yes or no No +1
= 4 points
Sand 1 point
Yes or no No -1
Yes or no No -1
Yes or no No -1
= -2 points
Foam 1 point
Yes or no yes +1
Yes or no No +1
Yes or no yes -1
2 points
• Total score is 4 points
Solar oven in the sunTime Temperature
0 minutes 25.0°c
5 minutes 46.9°c
10 minutes 47.0°c
15 minutes 55.3°c
20 minutes 46.8° c
25 minutes 55.6°c
Solar oven in the shadeTime Temperature
1 44.8 °c
2 41.2°c
3 36.9°c
4 34.4°c
5 33.0°c
6 31.7°c
Create for design #1
• Our heat score is our solar ovens maximum
temperature subtracted from the controlled oven
56.0 - 55.0 = 1.0.
• Our time score is the total minutes it took to cool
down which was 4 minutes.
• Our total impact score was 4 points.
• Our new total impact score for the solar oven is 1
Improve for design #1
• Our total score for design #1 was 1 the parts that
worked well were the sand and the aluminum the
sand got really hot from the suns light reflecting off
the aluminum lid and into the box which was good for
the temperature. The parts that didn't work so well
were the foam and the cotton balls the cotton balls
were taking up a little to much room and they didn't
get so hot.
Designing a solar oven #2• Top view
Plan for design #2
Plan for design #2
Material UnitsHow will you
use the material?
Aluminum 2 unitsPut on all of
the sides
Sand 1 unit
Put on top of the aluminum on the bottom
of the box
Impact score for design #2
Design #2
Reduce
Natural or
processed
Reuse Recycle Total
Aluminum 2 units
1 pointNatural -1 point
Yes -1 point
Yes -1 point
-2 points
Sand 1 unit
4 pointsProcess
ed +1 point
No +1 point
No +1 point
7 points
Solar oven testing in the sunTime Temperature
0 minutes 16.0
5 minutes 27.2
10 minutes 29.1
15 minutes 30.2
20 minutes 31.0
25 minutes 31.8
30 minutes 32.1
Solar oven testing in the shade
Time Temperature
1 minute 30.9
2 minutes 29.8
3 minutes 28.4
4 minutes 27.3
5 minutes 26.2
6 minutes 25.2
7 minutes 24.3
8 minutes 23.5
9 minutes 22.9
10 minutes 22.3
Create for design #2
• Our heat score is our solar ovens maximum
temperature subtracted from the controlled oven
32-41= -11
• Our time score is the number of minutes it took to
cool down which was 5 minutes
• Our total impact score was 5
• Our new total score for the solar oven is -11
Reflection
• Our design did not work well because our solar oven did not
have enough heat because our conductors (sand and
aluminum foil) was letting all of the heat out. It did not get
high scores which affected our other scores. We need to put
better insulators in our box like foam and felt.
• If we could improve our design I would put a lot of shredded
foam in the box and a little bit of sand. Shredded Foam is a
good insulator because shredded foam does not allow heat to
pass through the object which means that it will keep all of
the heat inside the box which will bring up our score.