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Brenda hernandez 2


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Brenda hernandez 2

  1. 1. Designing a solar ovenBy BrendaMonday, May 20, 13
  2. 2. Imagine for design 1I imagine that our materialsare yellow foam,cotton andsand with one unit.Foam is a good insulator thesame thing with cottoncotton and sand have a lowenvironmental impact.And foam has a highenvironmental impactIdea 1Monday, May 20, 13
  3. 3. Idea 2Our materials are still cotton thatsgoing on the top foam thats going onthe bottom and cloth thats on thesides and all in one unit.Cotton and cloth have low impactand they are good insulators andreusable.The bad thing about this that foamhigh impact and not recyclableAnd cotton and cloth are notrecyclable.Monday, May 20, 13
  4. 4. Top view/design #1Monday, May 20, 13
  5. 5. Side view/design #1Monday, May 20, 13
  6. 6. Plan for design #1Material UnitsWe will use thematerial byCotton balls 1 Leave it normalCloth 1 ShreddedFoam 1 ShreddedMonday, May 20, 13
  7. 7. Impact scoring sheetDesign #1ReducematerialunitsIs theMaterialnatural orprocessedIs thematerialhave beenreuseCan yourecycle thematerialThe pointsor thematerialCotton#of units 11Processed+1No +1 No +1 4 pointsYellowfoam 1 unit1Processed+1Yes -1 No +1 1 pointsCloth1 unit1Processed+1Yes +1 No +1 2 points7 pointMonday, May 20, 13
  8. 8. Solar oven testing in thesunTime Temperature0 min 25°C5 min 37.9°C10 min 41.3°C15 min 56.6°C20 min 59.4°C25 min 60.3°CMonday, May 20, 13
  9. 9. Solar oven in the shadeTime Temperature1 min 42.7°C2 min 35.8°C3 min 32.1°C4 min 31.2°C5 min 32.1°C6 min 31.1°C7 min 30.7°CMonday, May 20, 13
  10. 10. Create for design #1Our heat score is our solar oven maximumtemperature subtracted from control oven:1Our time score is the number of minutes it tookto cool down which was 7 minutesOur total impact score 7 pointsOur new total score for the solar oven is 0 pointMonday, May 20, 13
  11. 11. 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 wereour insulators worked well because they allowed to stay*The parts of our solar oven design that did not workwell were the time because it took a short time to cooldown.* We our going to try to improve our impact score*we will improve our impact score by making sure wecover all the holes to not let the heat escape because ifwe leave it with holes it will get hotter.Monday, May 20, 13
  12. 12. Plan for design #2Top viewMonday, May 20, 13
  13. 13. Plan for design side viewMonday, May 20, 13
  14. 14. Plan for design #2Material UnitsHow will you usethe material?White foam 1 sheet Cut in piecesCotton balls 1 scoop NothingSand 1 scoop NothingMonday, May 20, 13
  15. 15. Impact score for design #2Design#2ReduceNaturalorprocessedReuse Recycle TotalWhitefoam1 points +1 point +1 No -1 Yes 2 pointCottonballs1 points +1 point +1 No +1 No 4 pointsSand 1 points 1+ point -1 Yes +1 No 0 point6 pointsMonday, May 20, 13
  16. 16. Solar oven in the sun0 min 24.4°C5 min 40.7°C10min 47.2° C15 min 46.8°C20 min 47.3°C25min 49.9°C30 min 47.2°CMonday, May 20, 13
  17. 17. Solar oven in the shade1 min 46.8°C2 min 47.0°C3 min 46.9°C4 min 46.9°C5 min 46.9°C6 min 46 .9°C7 min 42.3°C8 min 72.7°C9 min 92.2°C10 min 90.1°CMonday, May 20, 13
  18. 18. Create for design #2Our heat score is our solar oven maximumtemperature subtracted from control oven:50-53=-3Our time score is the number of minutes it tookto cool down which was 10 minutesOur total impact score 6 pointsOur new total score for the solar oven is 1 pointMonday, May 20, 13
  19. 19. ReflectionOur improve design did not work well because thematerials were change except the cotton and we did notplace the materials correctly . The materials we changewere 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 becauseour score was lower and it decreased the temperature.If we could improve again, we would change thematerials to better insulators like yellow foam andcloth because our solar oven needs to be full withinsulators to keep in the heat.Monday, May 20, 13