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Prithvi solar oven
 

Prithvi solar oven

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    Prithvi solar oven Prithvi solar oven Presentation Transcript

    • Designing a Solar OvenBy Prithvi SenthilkumarMonday, May 20, 13
    • Imagine for Design 1• Idea #1• Our materials are dark cloth and cotton balls.• We need 1 unit of dark cloth and 2 units of cotton balls.• The advantage of this idea is that these materials will have asmall or medium impact on the environment and the colors ofthe materials will affect how much heat it absorbs.• The disadvantage of this idea is that the dark cloth isprocessed and has ink so it is not completely environmentallyfriendly.Monday, May 20, 13
    • Imagine for Design 2• Idea #2• Our materials are light colored cloth and colored shreddedfoam.• We need 1 unit of light colored cloth and 2 units of shreddedfoam.• The advantages of this idea is that shredded foam will be agood insulator and it will keep the heat inside.• The disadvantages of this idea is that the foam and the clothhave been processed so it affects the impact score.Monday, May 20, 13
    • Plan for Design 1Top viewMonday, May 20, 13
    • Plan for design #1Side viewMonday, May 20, 13
    • Plan for design #1Material UnitsWe will usematerial byCotton ballsDark cloth2 unitsGlue the pieceson the side ofthe oven.1 unitPlace it onbottom.Monday, May 20, 13
    • Impact score for design #1Design#1ReducedNaturalOrprocessReuse RecycleDarkClothCottonBalls1 unit Process Yes No2 units Process No NoPoints2 points7 pointsOur total impact score is 9 pointsMonday, May 20, 13
    • Solar oven testing in the sunTime Temperature0 min.5 min.10 min.15 min.20 min.25 min.25 C52.4 C52 C54 C55.7 C54.6 CMonday, May 20, 13
    • Solar oven testing in theshadeTime Temperature1 min.2 min.3 min.4 min.5 min.6 min.7 min.47.7 C41.9 C36.7 C34.8 C32.7 C31 CMonday, May 20, 13
    • Create for design #1• Our heat score is our solar oven maximumtemperature subtracted from the control oven.56 C - 55 C = 1• Our time score is the number of minutes it tookto cool down which was 4 minutes.• Our total impact score is 9.• Our total score for the solar oven is -4.Monday, May 20, 13
    • Improve for design #1• The total score for our first solar oven was -4 points.• The parts of our solar oven design that worked well was thedark cloth on the bottom because it absorbed the heat.• The parts of our solar oven design that did not work well wasthe cotton balls on the side because they were light and theydidnt absorb much heat.• We are going to try improve our heat score.• We will improve our heat score by getting dark foam andshredding and putting felt on the bottom because felt and foamare good insulators.Monday, May 20, 13
    • Plan for Design #2Top viewMonday, May 20, 13
    • Plan for Design #2Side viewMonday, May 20, 13
    • Plan for Design #2Material UnitsHow will youuse thematerial?Felt 1 unitWe will leave itflat. Covers theinside of box.Colored foam 1 unitWe will leave itflat, covers theinside of box.Black foam 1 unitWe will leave itflat. It coversthe edge of box.Monday, May 20, 13
    • Impact score forDesign #2Design#2ReduceNatural/processReuse RecycleFeltColoredfoamBlackfoam1 unit Process No No1 unit Process No Yes1 unit Process No NoTotalpoints4 points2 points4 pointsOur total impact score is 10Monday, May 20, 13
    • Solar oven testing in the sun.Time Temperature0 min.5 min.10 min.15 min.20 min.25 min.30 min.16 C25.9 C27.9 C28.5 C30.3 C39.1 C40.4 CMonday, May 20, 13
    • Solar oven testing in theshadeTime (minutes) Temperature1 min.2 min.3 min.4 min.5 min.6 min.7 min.8 min.9 min.10 min.31.9 C26 C23 C21 C19.7 C18.8 C18.7 C17.7 C17.3 C17.1 CMonday, May 20, 13
    • Create for Design #2• Our heat score is our solar oven maximumtemperature subtracted from the control oven:40 C - 41 C = -1 C• Our time score is the number of minutes it tocool down which was 4 minutes.• Our total impact score was 10 points.• Our total score for the solar oven is -7 points.Monday, May 20, 13
    • Reflection• Our improved design did not work well because the impactscore was higher and our heat score went down. Foam andfelt are good insulators but we placed them in the wrong placeand also they were flat. The materials we changed were thedark cloth to felt and the cotton balls to the foam. Thematerials were good insulators because they are thick andthey keep the heat in.• If we could improve again, we would cover the whole inside ofthe box with felt and we would shred the foam and tape itinside. We would do this because we need to cover the insideof the oven with a good insulator and shredded is better thanflat because it fills more space.Monday, May 20, 13