With solar power we can generate fresh water.

A photo-voltaic solar panels has been developed by KAUST .This device  captures shed shade, and electricity and water are produced using renewable energy to generate clean drinking water.

Wenbin Wang,  a Ph.D. Students in the laboratory of Peng Wang in the University's water desalination and  reuse  center research Conventional solar farmers use fresh water to wash dust.

Professor Wang and his team have developed a tool that can reduce the problem. Commercial PV panels convert sunlight into electricity with maximum efficiency of 20 percent. The remaining 80 percent is unusable, mainly in the form of heat, it is shed in the surrounding air. 

The team has developed an integrated tool that can catch this heat and use it to generate fresh water.

Researchers created a device, in which a heap of channels of water separated by porous hydrophobic membrane and heat conduction layers was attached to a commercial PV panel.

Waste heat from evaporated seawater in the above panel; Vapor crosses the porous membrane and condenses in the form of fresh water in a clean water channel below.

When condensed in the form of vapor, its heat passes through the next seawater channel through a thermal conduction layer, thereby recycling energy to purify more water.

Using three stacked layers of water distillation channels, and passing energy from layer to layer, the device produces water on every 1.64 liters per square meter on the surface of the solar panel.

Wenbin said conventional solar steel production is more than double. Meanwhile, the power output of the PV panel was unaffected by the desalination of water.