why do we need to save energy?
DESCRIPTION
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
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 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
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 world
population
is 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
Mil
lio
ns
of
toe
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-Steinhagen
Head of the Institute of Technical ThermodynamicsGerman 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