Solar Cooker Report” *Group 4. >Draft: Solar Cooker aluminium foil Plastic sheet Box Base Space...

Solar Cooker Report”

*Group 4

>Draft:

Solar Cooker

aluminium foil

Plastic sheet

Box

BaseSpace

Container

Solar Cooker

>Materials used:

1. Aluminium Foils2. Plastic Sheet3. Aluminium Can4. Black cloth5. Cardboard Box

The Modal Of Solar Cooker

Solar Cooker>Principle:1.Using the theorem of heat, we painted the box in black colour beca

use objects with a black, dull surface is a good absorber.2.Secondly,we make some space between the base and the box to le

t air go inside. Due to air is a good insulator of heat, it can helps us to trap the heat energy.

3.Thirdly,we glue several aluminium foil inside the box. Its silvery colour can reflect the radiation in order to trap the heat inside the box.

4.Then, we painted the base of the box in black colour to absorb heat and help to boil the water.

5.Next,we covered the container by a black cloth. The purpose is same to (4).

6.Eventually,we covered the entranceway of the box by a plastic sheet. It act as a glass to make greenhouse effect.

Experiment

Minute 0 5 10 15 20 25 30

Temperature

26.5

27 28 29 30 32 33

Minute 35 40 45 50 55 60

Temperature 33.5

34 34.5

35 35.5

35

>Data Presentation:

Experiment

Result:In the experiment, our solar cooker rose 9 degree

Celsius from 26.5 to 35 degree Celsius in 60 minutes.

That’s a good news! And we did the experiment successfully.

Discussion:We discovered that the smaller box is better than

the big one. It is because the container can absorbs the heat easier.

Put a plastic sheet on the container and the entranceway of the box to make a double green house effect may traps more heat.

Conclusion

1. The experiment proved that heat is absorbed easily by objects with black surface.

2. In green house effect, It also told us that air is a good insulator to trap the heat energy.

Members

4C classGroup leader:• Chan Sheung Yee(3)

• Cheung Sze Man(5)• Hui Yan Yi (7)• Li Yuen Ting(13)• Lee Wing Shing(34)