Solar oven by cho ei seona seol
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Solar Oven by Cho Ei Seona Seol. We prepared following items One sheet of cardboard to make the lid One small roll of aluminum foil. One can of flat-black spray paint white glue One Reynolds Oven Cooking Bag

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Solar Oven by Cho Ei Seona Seol

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Solar oven by cho ei seona seol

Solar Ovenby Cho Ei Seona Seol


Solar oven by cho ei seona seol

We prepared following items

  • One sheet of cardboard to make the lid

  • One small roll of aluminum foil.

  • One can of flat-black spray paint

  • white glue

  • One Reynolds Oven Cooking Bag

  • Two cardboard boxes

  • Inner box (18*18*16)inches

  • Outer box (22*22*20)inches


Solar oven by cho ei seona seol

  • The outer box which is larger at least half inch (1.5cm) or more all around for an airspace between the two boxes for insulation

  • Aluminum foil lining inside the outer box to retain heat


Solar oven by cho ei seona seol

  • Aluminum linings inside the outer box for reflecting the sunlight to get maximum sunlight and heat


Solar oven by cho ei seona seol

  • Cardboard as a drip pan

  • Aluminum foil is glued to the cardboard

  • The drip is spray painted black.

  • It serves two purposes:

    painted black to retain heat to heat up the cooking pot, and to hold the pot.


Solar oven by cho ei seona seol

  • Crumbled newspaper inside the outer box to cushion the inner box


Solar oven by cho ei seona seol

  • Inner box is inserted into outer box

  • Cut the excess flaps

  • Glue aluminum foils on the inner box flaps which are now glued to the outer box


Solar oven by cho ei seona seol

  • Make a lid by folding

    the four corners of a flat board.

  • Cut three sides of the lid.

  • The opening should be the size of the inner box.

  • Glue the inner side of the lid with aluminum foil. (this will be the primary reflector)


Solar oven by cho ei seona seol

  • Glue the oven cooking bag

    on the inner part of the lid

    to cover the opening.

  • Now the solar oven is completed and ready to use.


Solar oven by cho ei seona seol

  • Place a digital

    thermometer

  • (range: -65ºF to 450ºF)

  • Then measured the initial water temperature. (71ºF)

  • Close the lid and kept the oven in the sun making sure the sunlight from reflector reflects directly into the oven.

  • The temperature reaches to 91ºF after 5 minutes.


Solar oven by cho ei seona seol

  • The temperature reached to 122ºF five minutes later. (ten minutes after initial reading.)

  • 136ºF three minutes later after the last reading.

    (13 minutes after initial reading.)


Solar oven by cho ei seona seol

  • Five minutes later..

    162ºF …

    (18 minutes after initial reading.)

    (We also noticed the water started producing steams)

  • Five more minutes

    173ºF ..

    (23 minutes after initial reading.)


Solar oven by cho ei seona seol

  • Twenty five minutes

    after the initial reading…

    174ºF…

    (The temperature only

    went up 1ºF in two minutes)

  • Five more minutes later…

    (30 minutes after the initial reading)

    Now the temperature read 175ºF


Solar oven by cho ei seona seol

  • The maximum temperature we could obtain in this solar oven is 175ºF.

  • We can improve the efficiency by

    • adding more reflectors

    • Making it more air-tight by sealing all the corners

    • Use more efficient materials such as aluminum reflectors, glass oven window, etc,.

      Questions???


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