18. 2005 1000 0 5 000 bef. JC 10 000 bef. JC 5 million 250 million in 1 1 billion in 1800 3 billion in 1960 4 billion in 1975 5 billion in 1987 2 billion in 1930 6.5 billion in 2005 The world population is increasing
19. The world energy consumption is increasing 1 million tonnes oil equivalent = 11.6 MWh Source : IEA, Mai 2007 90% of fossil energy Rnv Energy Nuclear Natural gas Oil Coal Millions of toe
23. In Chinese, "the word « crisis » is made up of two letters. One represents danger and the other opportunity "
24. In only one day , the sun provides the Earth with the same energy to that consumed by humanity in 35 years
25. " With Concentrated Solar Power Stations, one thousandth of the deserts surface would be sufficient to cover the world’s need in electricity" Hans Müller-Steinhagen Head of the Institute of Technical Thermodynamics German Aerospace Center
26.
27. These are the electric motors that consume the most energy in the industry 70% Electrolysis Other uses Lighting Electric motors 9% 4% 17%
28. The purchase cost of a motor is nothing in relation to its cost of use Purchase cost 2.5% Maintenance cost 1.5% Energy cost 96% Global Cost of an electric motor
29. … and these are mainly the frequency inverters that allow
30. ... to reduce the energy invoice while adapting the demand to the need