Our energy requirements are increasing as our standard of living is increasing.

In order to fulfill our energy requirements, we are trying to improve the efficiency of existing sources or energy,

as well as trying to exploit new sources of energy.

 

Another reason to look for these new sources of energy is because our conventional sources of energy like Fossil Fuels will get exhausted very soon.

 

These new Energy sources are called Non-Conventional Sources of Energy.

 

Factors to consider while choosing an Energy source

When we consider an energy source, we should consider

  • Ease and Cost of extracting Energy from that source
  • Efficiency of technology available for using that energy source
  • How will we store that energy from the source
  • Environmental Impact of using that energy source

 

Examples of Non-Conventional Sources of Energy

 

Some examples of Non-Conventional Sources of Energy are 

Let’s look at them one-by-one

 

Solar Energy

Solar energy is the energy generated from the Sun’s radiation.

 

Sun has been been radiating energy for the last 5 billion years and will continue to do so for the next 5 billion years.

So, Solar Energy is a renewable source of Energy

 

The earliest uses of Solar Energy was Solar Cooker

Solar Cooker - Teachoo.jpg

Solar Cooker is a box which is painted black

It is painted black so as to absorb heat. 

 

It has a glass sheet at the top

And there is an outer layer which consists of a mirror

 

When in use, a bowl of rice is kept inside the glass sheet.

The mirror reflects the sun’s rays on the bowl

And due to black paint inside, the cooker absorbs heat.

And since there is a glass sheet above, the heat doesn’t escape (due to greenhouse effect)

So, suns rays are converted into heat in the Solar Cooker

 

 

Let’s look at how we use Solar Energy 

 

Solar Energy to Electricity

Solar Energy is converted into Electricity using Solar Cells

 

Solar Cells develop a voltage of 0.5-1 V and produce 0.7 W of electricity.

A large number of Solar Cells are combined to produce a Solar Cell Panel

Solar Cells - Teachoo.jpg

 

Advantages of Using Solar Cells

  • Solar cells have no moving parts
  • Solar cells require little maintenance
  • They can be set-up in remote places where laying a Power Transmission line might be expensive or not commercially viable

 

Disadvantages of Using Solar Cells

 

  • Availability of special grade silicon used for making solar cells is limited
  • Manufacturing Solar Cells is expensive, silver is used for joining the cells in the panel which makes the panel more expensive

 

Uses of Solar Energy

  • Artificial Satellites and space probes use Solar Cells as main source of energy
  • Radio, Wireless Tranmission System, TV relay stations use Solar Cell Panels

 



  1. Class 10
  2. Chapter 14 Class 10 - Sources of Energy

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.