why do we need to save energy?
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WHY DO WE NEED TO SAVE ENERGY?. Without Energy No Life. EARTH is a finite system. Nothing is created, Nothing is destroyed Everything is transformed. Source : BP Statistical Review of World Energy 2007. World's proven oil reserves are 1200 billion barrels. +. - PowerPoint PPT PresentationTRANSCRIPT
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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 destroyedEverything is transformed
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Source : BP Statistical Review of World Energy 2007
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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-0,5
0,0
0,5
1,0
1,5
2,0
2,5
3,0
2000 2001 2002 2003 2004 2005 2006 2007 2008
70
72
74
76
78
80
82
84
86
88
90
…continues to growthMillion Barrels of Oil a Day
An
nu
al g
row
th
An
nu
al C
on
sum
pti
on
Rest of the
World
USA
China
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With a world oil consumption growth of 1% per year …
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40 years… the oil reserves will be
exhausted in less than
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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
1850 1900 1950 2000
CO2
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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 world
in exponential growth
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2005100005 000 bef. JC10 000 bef. JC
5 million250 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
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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
Mil
lio
ns
of
toe
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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 world’s 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
70%
Electrolysis Other usesLighting
Electric motors
9%4%
17%
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The purchase cost of a motor
is nothing in relation to
its cost of usePurchase cost 2.5%
Maintenance cost 1.5%
Energy cost
96%Global Cost of an electric motor
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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 α v
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Pressure Proportional to the square speed
p α v²
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Power proportional to the cube speed
p α v²
P α v3
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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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Philippe Châtel - Lenze
Thank Youfor your attention