why do we need to save energy?

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