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Solar Cookers & Dryers: Part 1. Energy & Environment. Lets get started by refreshing our knowledge on solar energy. What are the different types of energy?. . Chemical. . Sound. . Potential. .................& . heat. Light. . . Electrical. Kinetic.

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Solar cookers dryers part 1

Solar Cookers & Dryers:Part 1

Energy & Environment



...................

Chemical

...................

Sound

...................

Potential

.................& ..............

heat

Light

...................

...................

Electrical

Kinetic


  • The sun is a source of energy.chemical energy. What types of energy is this chemical energy transferred into? Think about the different senses you observe when the suns rays hit you.

?

?

...................

Chemical

...................

Light

Heat


145 million km

The sun’s diameter is 100x larger than the earth

The Sun is nearly 93 million miles (approx 145 million km) from Earth

It takes 8 minutes 20 seconds for the light from the sun to reach the earth. This is called the speed of light.

  • India has 250 sunny days a year


? energy.

?

?

  • Can you think of some uses of solar energy?

Water heaters

Growing crops

  • Solar Panels

?

?

?

Cooking

Drying washing

Drying food


It makes it safe to eat

It kills bacteria and prevents illness and disease


Video of solar cookers in use

See video ‘solar bakery PRINCE India’


Cooking uses a lot of fuel. In one month a typical rural Indian household uses:

400-600kg of firewood for cooking

Leeds to Deforestation

Problems with collecting so much wood are:

Takes lots of time to gather


The sun as a fuel
The sun as a fuel cooking?

What is the boiling point of water?

  • So how can we use this to cook if we cant even boil water with this temperature?

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100°C

What temperature do we normally get from the sun?

...................

30-40°C

  • It’s now time for our first activity!


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