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

World's proven oil reserves are
1200 billion barrels Source : BP Statistical Review of World Energy 2007

600 billion barrels to extract
from tar sands in Canada and Venezuela +

The world consumption of oil…

… continues to growth Million
Barrels of Oil a Day Annual growth Annual Consumption 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 CO 2

The sea level has risen
15 to 20 cm over the 20 th century and is going to rise another 18 to 59 cm by the year 2100

We are living in a
world in exponential growth

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

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

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 Thermodynamics German Aerospace Center

These are the electric motors
that consume the most energy in the industry 70% Electrolysis Other uses Lighting Electric motors 9% 4% 17%

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

… 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 v 3

/ 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
You for your attention