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Lets get started by
  refreshing our
knowledge on solar
      energy.
   What are the different types
              of energy?




Sound                                              Chemical
...................                                ...................



                      Potential
                      ...................




 Electrical                                                               Light               heat
                                                                         .................& ..............
...................
                                            Kinetic
                                            ...................
    The sun is a source of 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
                     ...................
   Interesting facts about the sun:




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



   145 million km



The Sun is nearly 93 million miles   It takes 8 minutes for the light
(approx 145 million km) from Earth   from the sun to reach the earth.
                                     This is called the speed of light.




                                      India has 250 sunny days a year
?                 ?                  ?
    Drying washing     Solar Panels       Growing crops

   Can you think of some uses of solar energy?




      ?                       ?                   ?
    Cooking          Water heaters
                                            Drying food
    We can use solar energy to cook our
       food. But why is it important to cook
      food? Is it just to make the food taste
                        good?




It makes it safe to eat

It kills bacteria and
prevents illness and
disease
 How can we use solar
 energy to cook our food?
 Watch this video to find
            out:




     Video of solar cookers in use
     See video ‘solar bakery PRINCE India’
   Why is it good to use the sun
      instead of other fuels for cooking?


 Cooking uses a lot of fuel.
 In one month a typical rural
 Indian household uses:
              400-600kg
              of firewood
              for cooking

Problems with collecting so much wood are:

Takes lots of time to       Leeds to Deforestation
gather
What is the boiling point of water?
       100°C
     ...................

What temperature do we normally get
from the sun?
        30-40°C
        ...................


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

                   It’s now time for our
                    first activity!

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Solar cookers & dryers part 1

  • 1.
  • 2. Lets get started by refreshing our knowledge on solar energy.
  • 3. What are the different types of energy? Sound Chemical ................... ................... Potential ................... Electrical Light heat .................& .............. ................... Kinetic ...................
  • 4. The sun is a source of 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 ...................
  • 5. Interesting facts about the sun: The sun’s diameter is 100x larger than the earth 145 million km The Sun is nearly 93 million miles It takes 8 minutes for the light (approx 145 million km) from Earth from the sun to reach the earth. This is called the speed of light. India has 250 sunny days a year
  • 6. ? ? ? Drying washing Solar Panels Growing crops  Can you think of some uses of solar energy? ? ? ? Cooking Water heaters Drying food
  • 7. We can use solar energy to cook our food. But why is it important to cook food? Is it just to make the food taste good? It makes it safe to eat It kills bacteria and prevents illness and disease
  • 8.  How can we use solar energy to cook our food?  Watch this video to find out: Video of solar cookers in use See video ‘solar bakery PRINCE India’
  • 9. Why is it good to use the sun instead of other fuels for cooking? Cooking uses a lot of fuel. In one month a typical rural Indian household uses: 400-600kg of firewood for cooking Problems with collecting so much wood are: Takes lots of time to Leeds to Deforestation gather
  • 10. What is the boiling point of water? 100°C ................... What temperature do we normally get from the sun? 30-40°C ...................  So how can we use this to cook if we cant even boil water with this temperature?  It’s now time for our first activity!

Editor's Notes

  1. 1 liter of Kerosene for lighting vs. 400-600kgs of firewood perhousehold per month for cooking.
  2. How the sun heats up water?Particles more energy?? Boiling point of water = 100 degreesOnly get 35-40 from the sun.How can we use this to cook?By making proper arrangements for to track sun & trap the heat we can cook very efficiently, saving huge amount of wood, kerosene and other possible fuels. Due to this reason , since a decade the use of solar cooker domestically increased its need