Why do we need to save Energy?

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WHY DO WE NEED TO SAVE ENERGY?
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Without Energy No Life
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EARTH is a finite system
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Nothing is created, Nothing is
destroyed Everything is transformed
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World's proven oil reserves are 1200 billion
barrels
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600 billion barrelsto extract from tar sands in
Canada and Venezuela
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The world consumption of oil
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continues to growth

Million Barrels of Oil a Day
Rest of the World
Annual growth
Annual Consumption
USA
China
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With a world oil consumption growth of 1 per
year
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the oil reserves will be exhausted in less than
40 years
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But
Remember! The only thing that we have to fear, it
is that the sky might fall on our heads!
and precisely
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In 200 years, we will have released in the
atmosphere, the carbon that took nature 600
million years to trap
CO2
1850
1900
1950
2000
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The sea level has risen 15 to 20 cmover the 20th
century and is going to rise another 18 to 59 cm
by the year 2100
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We are living in a worldin exponential growth
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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
2005
1000
0
5 000 bef. JC
10 000 bef. JC
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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
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Energy cost is increasing
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How many Earths do we need ?
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In Chinese, "the word  crisis  is made up of
two letters.One represents danger and the other
opportunity"
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In only one day, the sun provides the Earth with
the same energy to that consumed by humanity in
35 years
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"With Concentrated Solar Power Stations, one
thousandth of the deserts surface would be
sufficient to cover the worlds need in
electricity"
Hans Müller-Steinhagen Head of the Institute of
Technical ThermodynamicsGerman Aerospace Center
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These are the electric motors that consume the
most energy in the industry
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The purchase cost of a motor is nothing in
relation to its cost of use
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and these are mainly the frequency inverters
that allow
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... to reduce the energy invoice while adapting
the demand to the need
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A centrifugal pump or a fan is characterized by
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A flow proportional to the speed
Q a v
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Pressure Proportional to the square speed
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Power proportional to the cube speed
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/ 2
A centrifugal pump or fan working to its nominal
speed divided by 2, so, to the half of the
maximal flow
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/ 8
has an energy consumption divided by 8
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30 up to 40 energy savings
can be realized for a centrifugal pump or a fan
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With a frequency inverter the working and service
costs decrease
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As of today,the manufactures consuming the most
efficient electric energy
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will be,the most competitive manufactures
tomorrow
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Now, you know
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Thank Youfor your attention
Philippe Châtel - Lenze