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The World´s Water Crises Explained

From Not Enough to Too Much, the World’s Water Crisis Explained

Many more cities than Cape Town face an uncertain future over water. But there are emerging solutions.

“Day Zero,” when at least a million homes in the city of Cape Town, South Africa, will no longer have any running water,

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Sauberes Wasser wird knapper...weltweit gesehen
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Die Wasserversorgung ist eines der wichtigsten globalen Themen.

Wasser wird mehr und mehr die strategische Ressource schlechthin darstellen.

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Global water crisis: Facts, FAQs, and how to help

Every child deserves clean water.

There’s nothing more essential to life on Earth than water. Yet, from Cape Town to Flint, Michigan, and from rural, sub-Saharan Africa to Asia’s teeming megacities, there’s a global water crisis.

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Cities in the face of drought
More than five billion people could suffer water shortages by 2050, as a vicious combination of climate change, increased demand and wasteful inefficiencies plunge the world’s water supply under threat. The Telegraph investigates what can be done to prevent future crises.
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Water becoming more valuable than gold

Over the past 10 years the S&P 500 Global Water index has outperformed the bellwether gold and energy indices. Water becoming more valuable than gold

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History of Windpower

State of the art

As you can see the historical development, required the world's wind energy technician 5000 years to reach a power per m2 swept rotor area of 400 to 450 watts for the three-leaf plants (1,000 kW up at rated wind speed of 12 m / sec). The three-leaf plants up to 50 kW power is currently at a maximum of 350 W/m2.

The revolutionary Windgiant wind turbine system opened up new physical performance limits in a relatively short development time, and reached for a 20 kW and 30 kW system, more than 2000 watts per m2 at a rated wind speed of 12 m / sec.


Stages of development of wind energy 3000 BC to 21 Century


Persian grain mill: 3000 to 700 years before Christ

The oldest was the use of wind power in Persia it
With the wind, the grain mills were powered. The turbines were running horizontal wooden wheels strung with linen cloths.
Existing remains of the wall are now listed.

Power per m2 swept area: No data available
003_persische_windmuehlen persische_windmhle

Greek and Spanish windmills: 11-17 century (1000 to 1700 N. Christ)

Were used as grain mills and transport for water in agriculture.
Standing in many countries listed.

Power per m2 swept area: 25 to 100 watts

Griechenland_Chios_Windmuehlen_Attika_Reisen_4a467f76a24ce 4-02620Griechenland20Kreta20Windmuehle20Lassithihochebene_t

Dutch windmills: 18th century (1701 to 1800)

This historic windmills in Holland in the 18th century brought a grain mills.
Are now largely a historical monument

Power per m2 swept area: 80 to 120 watts
Holland_Windmuehlen-Esther_Groen_sxc Holland2AK_20053195_kl_1

American Windmills: 19th century (1801 to 1900)

This historic windmill was used in America and Australia for drinking water and Tränkwassergewinnung for agriculture.

Power per m2 swept area: 100 to 150 watts
USA_1227379345PlzqVR USA_3imagesCA8UHY1J iUSA_magesCAY2DEGQ


Around 1880 in Europe about 200,000 windmills were in use.


Three-wing wind turbines: 20th century (1930 to present)


The mid-70s was the three-leaf plant by wind power worldwide, with this system
finds the most part in large-scale wind farms.

Efficient performance per m2 of rotor area by the wing geometry, only more limited.
(max. possible to 10%)

Power per m2 swept area: 280 to 450 watts
drei-geschichte drei-imagesCAHASC7G
Shaped turbine wind turbines: 21 Century (2001 to present)

The previous use of wind energy is pushed at the maximum power output per m2 swept to its limits. Efficient performance increases per m2 of painted surface are possible at the present state of the art only through innovative technologies such as the turbine-shaped wind turbines by using the WAVE system.

Power per m2 overlined turbine / rotor area: 1250 to 2000 Watts

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