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WHY DO WE NEED TO SAVE ENERGY? PowerPoint Presentation
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rigel-crane

WHY DO WE NEED TO SAVE ENERGY? - PowerPoint PPT Presentation

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WHY DO WE NEED TO SAVE ENERGY?
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  1. WHY DO WENEED TO SAVEENERGY?

  2. Without Energy No Life

  3. EARTH is a finitesystem

  4. Nothing is created, Nothing is destroyed Everything is transformed

  5. Source : BP Statistical Review of World Energy 2007 World's proven oil reserves are 1200 billion barrels

  6. + 600 billion barrelsto extract from tar sandsin Canada and Venezuela

  7. The world consumption of oil…

  8. …continues to growth Million Barrels of Oil a Day Rest of the World Annual growth Annual Consumption USA China

  9. With a world oil consumption growth of 1% per year…

  10. … the oil reserves will beexhausted in less than 40 years

  11. But… Remember! The only thing that we have to fear, it is that the sky might fall on our heads! … and precisely

  12. In200 years, we will havereleased in the atmosphere, the carbonthat took nature600 millionyears to trap CO2 2000 1850 1900 1950

  13. The sea level has risen 15 to 20 cmover the 20th century and is going to riseanother 18 to 59 cm by the year 2100

  14. We are living in a worldin exponential growth

  15. 6.5 billion in 2005 5 billion in 1987 4 billion in 1975 The worldpopulationis increasing 3 billion in 1960 2 billion in 1930 1 billion in 1800 250 million in 1 5 million 10 000 bef. JC 5 000 bef. JC 0 1000 2005

  16. The world energy consumption is increasing Rnv Energy Nuclear Natural gas Oil Coal Millions of toe 90% of fossil energy 1 million tonnes oil equivalent = 11.6 MWh Source : IEA, Mai 2007

  17. Energy cost is increasing

  18. How many Earths do we need ?

  19. In Chinese, "the word « crisis » is made up of two letters.One represents danger and the other opportunity"

  20. In only one day, the sun provides theEarth with the same energy to thatconsumed by humanity in 35 years

  21. "WithConcentrated Solar Power Stations,one thousandth of the deserts surfacewould be sufficient to coverthe world’s need in electricity" Hans Müller-Steinhagen Head of the Institute of Technical ThermodynamicsGerman Aerospace Center

  22. 9% 4% Electrolysis Lighting 17% Other uses Electric motors 70% These are the electric motors that consumethe most energy in the industry

  23. Purchase cost 2.5% Maintenance cost 1.5% Energy cost 96% Global Cost of an electric motor The purchase cost of a motoris nothing in relation toits cost of use

  24. … and these are mainly thefrequency inverters that allow

  25. ... to reduce the energy invoicewhile adapting the demand to the need

  26. A centrifugal pump ora fan is characterized by

  27. A flow proportional to the speed Q α v

  28. p α v² Pressure Proportionalto the square speed

  29. P α v3 p α v² Power proportionalto the cube speed

  30. / 2 A centrifugal pump or fan working to itsnominal speed divided by 2,so, to the half of the maximal flow

  31. / 8 … has an energy consumptiondivided by 8

  32. 30 up to 40% energy savings can be realized for acentrifugal pump or a fan

  33. With a frequency inverterthe working and service costs decrease

  34. As of today,the manufactures consumingthe most efficient electric energy …

  35. … will be,the most competitivemanufacturestomorrow

  36. Now, you know

  37. Thank Youfor your attention Philippe Châtel - Lenze