Sources of Energy: Quick notes-Science, Class 10, CBSE. (Also a major topic in Energy Engineering)

Conventional Sources of Energy:

1. Fossil fuels: Most Common, Non-Renewable, Causes pollution.
2. Thermal power plants: Fuel burnt-Heating water to steam-drive turbines-produce electricity.
3. Hydro Power plants: Flowing water- passed through turbines- produce electricity.

Improvements in Technology in using Conventional energy sources seen in:

1.Bio mass energy: Slurry fed into Digester-Anaerobic decomposition- Bio gas produced used as fuel. ,

2.Wind energy: Kinetic energy used to drive turbines- Enviro-friendly

Alternative or Non conventional sources of Energy: 

1. Solar Energy : Solar cooker: Uses heat to cook food. Solar Cell: Converts Solar energy to Electrical energy which can be stored in batteries.
2. Energy from the Sea: a)Tidal Energy: Tides made to flow through an opening of a Dam at sea into a turbine., b)Wave Energy: Similar to tidal energy. , c)Ocean Thermal energy: Tapping Heat energy from ocean currents set up due to temperature difference.
3. Geothermal energy: Steam from underground sources drives turbines and produce electricity
4. Nuclear energy: Energy from Nuclear Fission used to produce steam and further, electricity. Environmental contamination, Accidental risks, High plant installation costs are major concerns.