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Island time materials presentation
1. Island Time
Material
Presentation
By: Dany Cho, Fergus Reid-Kay, Paul Lin,
Isabella Chan
7N
2. Introduction (Materials)
Hello, we are the Materials group and we will be
explaining what kind of materials are best used to
create a solar cooker. As we have discussed in our
previous lessons, we can use different things to create
heat. A few of the things that we have discovered is
compost, metal, plastic and glass. These materials
produce heat in a few different ways. For example,
compost can produce natural heat by surrounding a
metal bucket in a small ditch which water can be
placed in to be boiled and purified. These materials
are very useful as they are very cheap and easy to
get.
3. Different types of
Materials for Solar
Cookers?
• Metal
• Plastic
• Glass (Reflective, tempered)
• Insulators
4. Reusable Materials we
could use
• Plastic Bottles
• Glass Bottles
• Compost (Lots in Tibet)
5. What types of materials
are better to use?
• Compost would be better because it radiates
natural heat and aluminum foil would also be better
as well because it is a very good insulator.
6. What materials can be
used for optimum
insulating properties?
• Transparent Plastic
• Reflective Material (Glass, Plain Aluminum Foil)
7. How do these materials
insulate well?
• Aluminum foil is a very good insulator because
when it is wrapped around an item, there are small
pockets of trapped air. Trapped air is a very good
conductor and convection.
9. Are there any other
properties to consider for
the materials?
• The color black absorbs heat very well so it could
be better to use.
10. How does the density and weight
of materials affect how heat is
stored and radiated in the cooker?
• Aluminum 2700 per meter square.
• 2.7 grams per cm square.
• Light metal compared to other metal.
11. If your solar cooker was made from
paper and card would it burn from
the solar heat?
• It most probably would because paper is very
flammable and it would not be a very useful
material to use in a solar cooker.
12. Our Budget
• $50 (HK) for 1 bucket of aluminum.
• $6 (HK) for 1 sheet aluminum foil that covers the top
of the aluminum bucket.
• $FREE Compost.
