Evelyn rojas design a solar oven


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Evelyn rojas design a solar oven

  1. 1. Design a solar ovenBy: Evelyn RojasMonday, May 20, 13
  2. 2. Imagine for design #1Our materials are Cotton Balls, Foam, and Sand.The advantages is that the sunlight will go to the sand onthe bottom which will make it hot and then the cotton ballswill get ht, and the foam will keep the heat inside.The disadvantages are that the materials over heat in thesolar oven then the item inside the solar oven could burn .Monday, May 20, 13
  3. 3. Imagine design #2Our materials are Sand and foilAre advantages is that the sand and foil will heat up theboxOur disadvantages is that the foil will burnMonday, May 20, 13
  4. 4. Plan design #1Monday, May 20, 13
  5. 5. Plan Design #2Top viewMonday, May 20, 13
  6. 6. Plan designMaterials UnitsSand 1We will use the materialsOn the bottomof the boxCotton balls 1Foam 1The cotton balls cango on top of the SandThe foam can go onthe onto some of thesidesMonday, May 20, 13
  7. 7. Impact score for design #1Design#1ReduceNatural orprocessedReuse RecycleTotalpointsCottonballsSandFoam1 unit Processed No No 41 unit Natural Yes Yes -21 unit Processed No Yes 2The total points 4Monday, May 20, 13
  8. 8. Solar oven temperatureTime (minutes) Solar oven temperature12345644.841.236.934.433.031.7Monday, May 20, 13
  9. 9. Solar oven testing in the sunTime Temperature0 minutes5 minutes10 minutes15 minutes20 minutes25 minutes25.0°c46.9°c47.0°c55.3°c46.8°c55.6°cMonday, May 20, 13
  10. 10. Create56.0°c-55.0°= 1.0° so our heat score4 minutes is the time scoreThe total impact score is 4 minutes1 + 4 min -4= 1 so 1 is the total scoreMonday, May 20, 13
  11. 11. ImproveThe total score for our first solar ovenwas 1 pointThe sandMonday, May 20, 13
  12. 12. Plan for Design #2Design#2ReduceNaturalorprocesseReuseRecycleor returnto natureSandAluminumfoil1 unit Natural Yes Yes2 units Processed No NoTotal points 5Monday, May 20, 13
  13. 13. Plan design #2Material UnitsHow will yo u use thematerialSandAluminum foil1 unit Flat it2 units Cut itMonday, May 20, 13
  14. 14. Impact score for design #2Design#2ReduceNatural orprocessedReduce RecycleTotalpointsSandAluminumfoilI point Natural Yes Yes -22 points Processed No No 75Total points 5Monday, May 20, 13
  15. 15. Solar oven testing in sunTime Temperature051015202516., May 20, 13
  16. 16. Solar oven temperatureTime (minutes) Solar oven temperature1 30.92 29.83 28.44 27.35 26.26 25.27 24.38 23.59 22.910 22.3Monday, May 20, 13
  17. 17. Create for design #2Our heat score is a solar oven maximumtemperature subtract from the control oven-11+5-5=5 is the total.Our score is the number of minutes it took to cooldown which was 5 minutes.Our total impact score was 5.New score for the solar oven is -11.Monday, May 20, 13
  18. 18. ReflectionOur improved design did not work because itdoesnt have a lot of heat and and thetemperatures were lower the temperatures werelower because it didnt Have a lot of insulators.If we could improve again we would put a lot ofmore things like more cotton, foam and sand andthe temperatures are going to be more higherbecause its going to keep more heat in.Monday, May 20, 13