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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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Additional speeds at 12 m/sec



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ADDITIONAL SPEEDS

Additional speeds are obtained due to the reduction in the cross-section provided by the tapered flow ducts in the wind turbine, which creates a tunnel-like effect.

The air stream is given a twisting movement through the internal, annularly arranged flow ducts. This momentum is generated by the clockwise rotation of the enclosed turbine.

The denser and more controlled the movement of the air is, the faster and more powerful the flow becomes. The resulting potential turbulence exhibits an independent acceleration effect.

From an energy technology viewpoint, the objective is not only to use the kinetic fraction of the energy contained in the air, but also the considerably larger amount of potential energy stored in the form of pressure..

 

Flow pattern 20 kW and 30 kW turbine


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SUCTION EFFECT

The faster stream, which runs past the outer rim of the wind turbine, exerts suction on the slower flow behind the turbine, where underpressure predominates. The velocity of this stream is previously slowed by the collision with the rotor blades. The underpressure also serves to raise the speed in the flow ducts.

The high kinetic energy of such air streams cannot be emulated using pressure. Rather, the enormous kinetic energy of the normal, but chaotic, wind stream only obtains a utilitarian structure once suction is applied. Like pressure, the suction then spreads to distant areas.

WINDGIANT® systems use the effect of suction, the force of implosion, whereby the natural wind force is concentrated and accelerated. As the power available to the wind turbine is proportional to the cube of the wind velocity, maximum energy returns of energy are obtained from all usable wind forces.