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  • 1. Page 1
  • 2. • A source or supply from which benefit is produced. 3 main characteristics: Utility Limited availability Potential for depletion or consumption. Page 2
  • 3. Page 3
  • 4. • A natural resource.• Ability to reproduce through biological or natural processes and replenished with the passage of time.• Are part of our natural environment and form our eco- system . Page 4
  • 5. • Solar energy• Tides• Winds• Geothermal• Biomass and• Other natural elements. Page 5
  • 6. • Gasoline,• Coal• natural gas,• diesel and• other commodities derived from fossil fuels.• minerals like copper and others without a sustainable yield. Page 6
  • 7. Renewable resources Page 7
  • 8. Solar energy Page 8
  • 9. • Energy derived from the sun in the form of solar radiation.• It is the most readily available and free source of energy since prehistoric times.• India receives solar energy in the region of 5 to 7 kWh/m2 for 300 to 330 days in a year. Page 9
  • 10. • This energy is sufficient to set up 20 MW solar power plant per square kilometer land area.• Solar thermal route uses the suns heat to produce hot water or air, cook food, drying materials etc.• Solar photovoltaic uses sun’s heat to produce electricity for lighting home and building, running motors, pumps, electric appliances, and lighting. Page 10
  • 11. Solar Flat plate collector Box type solar cookers: Photovoltaic Domestic
  • 12. Wind Energy Page 12
  • 13. Wind Energy• Harnessing of wind power to produce electricity.• The kinetic energy of the wind is converted to electrical energy. Page 13
  • 14. • When solar radiation enters the earth’s atmosphere, different regions of the atmosphere are heated to different degrees because of earth curvature.• This heating is higher at the equator and lowest at the poles.• Since air tends to flow from warmer to cooler regions, this causes winds, and it is these airflows that are harnessed in windmills and wind turbines to produce power Page 14
  • 15. Page 15
  • 16. Bio Energy• A renewable energy resource derived from the carbonaceous waste of various human and natural activities.• Derived from numerous sources, including the by-products from the wood industry, agricultural crops, raw material from the forest, household wastes etc. Page 16
  • 17. • Does not add carbon dioxide to the atmosphere as it absorbs the same amount of carbon in growing as it releases when consumed as a fuel.• Advantage is used to generate electricity with the same equipment that is now being used for burning fossil fuels. Page 17
  • 18. Biogas• Bio-energy, in the form of biogas, which is derived from biomass,• Is expected to become one of the key energy resources for global sustainable development. Page 18
  • 19. Hydro Energy• The potential energy of falling water, captured and converted to mechanical energy by waterwheels.• Water under pressure flows through a turbine causing it to spin. The Turbine is connected to a generator, which produces electricity Page 19
  • 20. Hydro Power Plant Page 20
  • 21. Tidal Energy• Tidal electricity generation involves the construction of a barrage across an estuary to block the incoming and outgoing tide.• The head of water is then used to drive turbines to generate electricity from the elevated water in the basin as in hydroelectric dams. Page 21
  • 22. Page 22
  • 23. Let’s contribute for a Greener Planet… Page 23
  • 24. Page 24