brenda hernandez 2
TRANSCRIPT
Designing a solar ovenBy Brenda
Monday, May 20, 13
Imagine for design 1
I imagine that our materials are yellow foam,cotton and sand with one unit.
Foam is a good insulator the same thing with cotton cotton and sand have a low environmental impact.
And foam has a high environmental impact
Idea 1
Monday, May 20, 13
Idea 2Our materials are still cotton that's going on the top foam that's going on the bottom and cloth that's on the sides and all in one unit.
Cotton and cloth have low impact and they are good insulators and reusable.
The bad thing about this that foam high impact and not recyclable
And cotton and cloth are not recyclable.
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Top view/design #1
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Side view/design #1
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Plan for design #1Material Units We will use the
material by
Cotton balls 1 Leave it normal
Cloth 1 Shredded
Foam 1 Shredded
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Impact scoring sheetDesign #1
Reduce material
units
Is the Material
natural or processed
Is the material
have been reuse
Can you recycle the
material
The points or the
material
Cotton#of units 1 1 Processed
+1 No +1 No +1 4 points
Yellow foam 1 unit 1 Processed
+1 Yes -1 No +1 1 points
Cloth 1 unit 1 Processed
+1 Yes +1 No +1 2 points
7 point Monday, May 20, 13
Solar oven testing in the sun
Time 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°CMonday, May 20, 13
Solar oven in the shade Time 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°CMonday, May 20, 13
Create for design #1
Our heat score is our solar oven maximum temperature subtracted from control oven:1
Our time score is the number of minutes it took to cool down which was 7 minutes
Our total impact score 7 points
Our new total score for the solar oven is 0 point
Monday, May 20, 13
Improve for design #1
*The total score for our first solar oven was 0 points *The parts of our solar oven design that work well were our insulators worked well because they allowed to stay
*The parts of our solar oven design that did not work well were the time because it took a short time to cool
down.* We our going to try to improve our impact score
*we will improve our impact score by making sure we cover all the holes to not let the heat escape because if
we leave it with holes it will get hotter.
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Plan for design #2Top view
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Plan for design \ side view
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Plan for design #2
Material Units How will you use the material?
White foam 1 sheet Cut in pieces
Cotton balls 1 scoop Nothing
Sand 1 scoop Nothing
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Impact score for design #2Design
#2 ReduceNatural
or process
ed
Reuse Recycle Total
White foam 1 points +1 point +1 No -1 Yes 2 point
Cotton balls 1 points +1 point +1 No +1 No 4 points
Sand 1 points 1+ point -1 Yes +1 No 0 point
6 pointsMonday, May 20, 13
Solar oven in the sun 0 min 24.4°C
5 min 40.7°C
10min 47.2° C
15 min 46.8°C
20 min 47.3°C
25min 49.9°C
30 min 47.2°C
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Solar oven in the shade 1 min 46.8°C
2 min 47.0°C
3 min 46.9°C
4 min 46.9°C
5 min 46.9°C
6 min 46 .9°C
7 min 42.3°C
8 min 72.7°C
9 min 92.2°C
10 min 90.1°CMonday, May 20, 13
Create for design #2
Our heat score is our solar oven maximum temperature subtracted from control oven:50-53=-3
Our time score is the number of minutes it took to cool down which was 10 minutes
Our total impact score 6 points
Our new total score for the solar oven is 1 point
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Reflection Our improve design did not work well because the materials were change except the cotton and we did not place the materials correctly . The materials we change were yellow foam and cloth to white foam and sand. The only material that stayed the same was the cotton. The materials we added were poor insulators because our score was lower and it decreased the temperature.
If we could improve again, we would change the materials to better insulators like yellow foam and cloth because our solar oven needs to be full with insulators to keep in the heat.
Monday, May 20, 13