Hot water in a immersion heater.

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Pratin Patel 10O MR Welsh Science Coursework
22
nd November 2003

Hot water in a immersion heater.

Background Knowledge:

Water may be used to heat up water during the night using an immersion heater this is to take advantage of the cheap rate of electricity. But the problem is to keep the water’s heat till the time when it is used. E.g. for a bath or washing up. Immersion heaters are used in many homes and are very efficient. They insulate heat well, this is because most of them have an insulated jacket which is mainly made out of a fibre glass wool and are coated with a bright colour this is because fibre glass wool is very thick and does have many air holes in it. This is good because heat air is a good conductor of heat and a bad insulator of heat, therefore the fewer the air holes the fewer the heat is that is conducted. Also the being as the wool has an outer colour coat which is bright this is also good as bright colours are good emitters of heat. I will conduct my own experiment to see if what other materials are good insulators of heat, by making my own mini boiler jackets and testing them.

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Key Factors:

Immersion heaters that we are using are tin cans which are filled with heated water. Therefore I also will have to consider in my experiment what will effects that the types of materials will have on my results. Due to this I will consider the size and shape of my tins that I will put the water in, also I will have to keep the same volume to make it a fair test. I will boil my water to 70˚C, for each material I test. I will also consider the type of material I use, considering the ...

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