Preston

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Preston

  1. 1. DESIGNING A SOLAR OVENBy Preston CorneliusMonday, May 20, 13
  2. 2. IMAGINE FOR DESIGN #1• Idea #1:My group thinks that we should use river rocks to cover thebottom of the oven so that it holds the heat that hits the bottom,when I step on some by the lake they sometimes get super hot, wethought foam should go on the walls because foam is one of the bestthings on our list if objects to use to insulate.• We want one cup of river rocks and two units (two sheets, like paper)of foam.The good thing about this idea is that river rocks arecompletely natural and dont hurt the environment, and the foam isreusable.The disadvantages are that the foam takes a long time todecompose and when we through it in a landfill it will stay there awhile.Monday, May 20, 13
  3. 3. IMAGINE FOR DESIGN #1• Idea #2: For this idea we think we should use felt to cover thewalls and try to contain most of the heat, and Shredded Foamto cover the ground because it is one of the best insulators.• We want 2 units of felt, and 1 unit of foam.The good thing Isthe felt is renewable and foam is too. But the bad part is thatthey both cannot be recycled, and they both have a lot of inkinside them, which can harm the environment.Monday, May 20, 13
  4. 4. PLAN FOR DESIGN #1Monday, May 20, 13
  5. 5. PLAN FOR DESIGN #1Monday, May 20, 13
  6. 6. PLAN FOR DESIGN #1Material UnitsWe will use thematerial byFoam 1Spreading it acrossthe bottomFelt 2Covering the sideswith itMonday, May 20, 13
  7. 7. IMPACT SCORE FOR DESIGN#1Design#1ReduceNatural orProcessed Reuse Recycle ScoreFelt2 unitsFoam1unit2 units=4 pointsProcessed1pointNo1pointNo1point71 unit=1pointProcessed1pointNo1pointNo1point4Totalscore11Monday, May 20, 13
  8. 8. SOLAR OVENTESTING INTHESUNTime Temperature0 min.5 min.10 min.15 min.20 min.25 min.0°c25°c46.2°c66.2°c65.6°c71.1°cMonday, May 20, 13
  9. 9. SOLAR OVENTESTING INTHESHADETime Temperature1 min.2 min.3 min.4 min.5 min.6 min.54.2°c44.1°c36.9°c32.9°c31.6°c30.0°cMonday, May 20, 13
  10. 10. CREATE FOR DESIGN #1• Our heat score is our solar ovens maximum temperaturesubtracted from the control ovens maximum temperature:72-55=17• Our time score is the number of minutes it took to cool downwhich was 4 minutes.• Our total impact score was 11 points.• Our total score for the solar oven is 10Monday, May 20, 13
  11. 11. IMPROVE DESIGN #1• The total score for our first solar oven is 10 points.• The part of our solar oven that worked well was the foam that was inside.Thisprobably worked well because it was the best heat insulator in our oven.• The part of our solar oven that did not work well was the felt. I think that becausewe put thin layers on the walls and it could not contain all of the heat that came in.• We are going to try to improve our heat score. Other solar ovens were getting alot higher heat scores than us.• We think that the only way to make our heat score go up is to use two units ofShredded foam and one shredded unit of felt.This well help because we know thatshredded things take up more space, leading to they absorb more heat.Monday, May 20, 13
  12. 12. PLAN FOR DESIGN #2Monday, May 20, 13
  13. 13. PLAN FOR DESIGN #2Monday, May 20, 13
  14. 14. PLAN FOR DESIGN #2Material Units How we will use itFoam 2 unitsTo cover theground and be themain insulatorFelt 1unitTo hold any thingthe foam cant anywhere elseMonday, May 20, 13
  15. 15. IMPACT SCORE FOR DESIGN #2Design#2ReduceNaturalorProcessedReuse RecycleTotalpointsFoamFelt2 units, 4pointsProcessed+1 pointHas notbeen usedbefore+1 pointCan notrecycle+1 point7 points1 unit, 1pointProcessed+1 pointHas notbeen usedbefore+1 pointCan notrecycle+1 point4 pointsWe want a low score, our score is 11.Monday, May 20, 13
  16. 16. SOLAR OVENTESTING INTHE SUNTime Temperature0 min.5 min.10 min.15 min.20 min.25 min.30 min.16°c54.3°c54.3°c54.1°c54.5°c54.6°c54.8°cMonday, May 20, 13
  17. 17. SOLAR OVENTESTING INTHE SHADETime Temperature1 min.2 min.3 min.4 min.5 min.6 min.7 min.8 min.9 min.10 min.54.2°c54°c54.2°c54°c53.9°c54°c54.2°c54.9°c54.4°c54.8°cMonday, May 20, 13
  18. 18. CREATE FOR DESIGN #2• Our heat score is our solar ovens maximum temperaturesubtracted from the control oven: 55-41=14• Our time score is the number of minutes it took to cool downwhich was 10 minutes.• Our total impact score was 11 points.• To find the total score I add the heat score and the time scoretogether, and then do subtraction with that and the total impactscore.The total score is 13.Monday, May 20, 13
  19. 19. REFLECTION• The design we came up with to improve actually improved the oven. Itmight have happened because we shredded everything in the box.Wealso decreased the amount of felt and increased the amount of foam.Thefoam must be the thing that helps hold and keep the heat inside the box.• If we wanted to improve how our oven holds heat in, I would ONLY useshredded foam because shredded things take up more space and moreinsulation, and foam seems to be the best insulator. But that would affectour score of how it affects the environment. It would give us a higherenvironment score because you can not recycle foam, reuse it, it has beenproduced in a factory and is not natural, and I would be using 3 units of it.Monday, May 20, 13

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