DESIGNING A SOLAR OVENBy: Burhanuddin AkbariMonday, May 20, 13
IMAGINE FOR DESIGN #1• Idea #1• Our materials were shredded felt and ﬂat foam.• We needed 1 sheet of felt that we shredded and 2sheets of foam.• The advantages of this idea is that both of thematerials are good insulators.Also these materialscover all of the solar oven.• Some disadvantages are that the foam has a largeimpact on the environment.Monday, May 20, 13
IMAGINE FOR DESIGN #1• Idea #2• Our materials are the same shredded felt and ﬂat foam.• The units we need are different.We need 2 sheets of felt thatwe will shred, and 1 sheet of foam.• The advantages are that shredded materials are betterinsulators and there is more shredded then ﬂat.• The disadvantages are that we might not have enough foam tocover the sides of the solar oven.Monday, May 20, 13
SOLAR OVENTESTING INTHE SUNTime Temperature0 Minutes5 Minutes10 Minutes15 Minutes20 Minutes25 Minutes25°C47°C55.8°C60°C61.6°C58°CMonday, May 20, 13
SOLAR OVEN INTHE SHADETime Temperature1 Minute2 Minutes3 Minutes4 Minutes5 Minutes6 Minutes40°C38.8°C37.4°C32.5°C31.1°C30.9°CMonday, May 20, 13
CREATE FOR DESIGN #1• Our heat score is the solar oven maximum temperaturesubtracted from the control oven: 62°C-55°C=7°C• Our time score is the number of minutes it took to cool downwhich was 4 minutes.• Our total impact score was 11.• Our total solar oven score was 0.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 that worked well were theinsulation because we used shredded materials that are goodinsulators.• The parts of our solar oven that didnt work well was that ourimpact score was too high because we used materials thatwerent recyclable and werent reused.• We will improve our impact score by using materials that aredont hurt the environment.Monday, May 20, 13
PLAN FOR DESIGN #2Material UnitsHow will you usethis materialSandRocksNewspaper1Cover the bottomof the solar oven.1Cover the bottomof the solar oven.1Put it on the sidesof the solar oven.Monday, May 20, 13
SOLAR OVENTESTING IN SUNTime Temperature0 minutes5 minutes10 minutes15 minutes20 minutes25 minutes30 minutes16°C30.2°C33.6°C36.1°C34.1°C37.3°C37.4°CMonday, May 20, 13
SOLAR OVENTESTING IN SHADETime Temperature1 minutes2 minute3 minutes4 minutes5 minutes6 minutes7 minutes28.6°C26°C24°C22°C21°C20.5°C20.3°CMonday, May 20, 13
CREATE FOR DESIGN #2• Our heat is our solar oven maximum temperaturesubtracted from the control oven: 37°-41°=-4°C.• Our times score is the minutes it took to cool downwhich was 5 minutes.• Our total impact score was -4 points.• Our new total score for the solar oven is 5 points.Monday, May 20, 13
REFLECTION• Our improved design worked because our total score went up5 points due to a low impact score on the environment.Thematerials we changed were from foam and felt to sand, rocks,and newspaper. However, the materials were poor insulatorsbecause it didnt trap much heat in. Our temperaturedecreased and the temperature didnt get higher then thecontrol temperature.• If we could improve again we would put a better insulatorinstead of rocks, sand and newspaper because thetemperature didnt get very high.We would want to make thetemperature go up.Monday, May 20, 13
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