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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 destroyedEverything is transformed
Source : BP Statistical Review of World Energy 2007
World's proven oil reserves are
1200 billion barrels
600 billion barrelsto extract from tar sands in Canada and Venezuela
+
The world consumption of oil…
-0,5
0,0
0,5
1,0
1,5
2,0
2,5
3,0
2000 2001 2002 2003 2004 2005 2006 2007 20087072747678808284868890
…continues to growthMillion Barrels of Oil a Day
Ann
ual g
row
th
Ann
ual C
onsu
mpt
ion
Rest of the
World
USA
China
With a world oil consumption growth of 1% per year …
40 years… the oil reserves will be
exhausted in less than
But…
Remember! The only thing that we have to fear, it is that the sky
might fall on our heads!
… and precisely
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
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
We are living in a world
in exponential growth
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 worldpopulationis increasing
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
Mill
ions
of t
oe
Energy cost is increasing
How many Earths do we need ?
In Chinese, "the word « crisis » is made up of two letters.One represents danger and the
other opportunity"
In only one day, the sun provides the Earth with the same energy to that consumed by humanity in 35 years
"With Concentrated Solar Power Stations, one thousandth of the deserts surface would be sufficient to cover the world’s need in electricity"
Hans Müller-SteinhagenHead of the Institute of Technical Thermodynamics
German Aerospace Center
These are the electric motors that consume the most energy in the industry
70%
Electrolysis Other usesLighting
Electric motors
9%4%
17%
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
… and these are mainly the frequency inverters that allow
... to reduce the energy invoice while adapting the demand to the need
A centrifugal pump or a fan is characterized by
A flow proportional to the speed
Q α v
Pressure Proportional to the square speed
p α v²
Power proportional to the cube speed
p α v²
P α v3
/ 2
A centrifugal pump or fan working to its nominal speed divided by 2, so, to the half of the maximal flow
/ 8… has an energy consumption
divided by 8
30 up to 40% energy savings
can be realized for a centrifugal pump or a fan
With a frequency inverter the working and service costs decrease
As of today,the manufactures consuming the most efficient electric energy …
… will be,the most competitive manufactures tomorrow
Now, you know
Philippe Châtel - Lenze
Thank Youfor your attention