Never heard of solar energy desalination?
In short, it refers to a specific system used to desalinate water. The process uses solar energy, and is chosen when there are no alternative desalination methods. Recent research has brought to light a new system capable of blocking the accumulation of salt, with the help of solar energy.
Desalination for $ 4
For just four dollars, the equivalent of €3.50, the 1 m version2 of the device is able to provide clean drinking water for a family. Scientists built it using easy-to-find everyday materials to make it accessible to all countries of the world.
The news comes directly from the blog of the MIT, and deserves to be explored.
Desalination helps combat water scarcity
The problem of water scarcity is certainly not to be underestimated. By 2025, it could affect half the world's population (as reported UNICEF). Nearly two thirds of the population are already severely affected by the problem.
Compared to previous models, this system has no wick – a part that usually requires a lot of cleaning due to salt buildup. Thanks to this feature, the model appears much more practical and efficient.
The MIT desalination device consists of different levels floating above a container of salt water.
- First layer
A first layer made of tiny perforations sucks a strip of water from the container. - Second layer
A second layer made of a very dark material absorbs heat from sunlight and allows water to evaporate. - Third layer
The third step involves the condensation of the water, which is then used as drinking water.
Help for remote locations
Based on the results obtained from the first trials, we know that this desalination technique is 80% more efficient in converting solar energy into water vapor.
At the same time, fouling is reduced to zero thanks to the absence of the wick. Harmful salt build-ups are no longer a threat to the efficiency of the device.
MIT's new desalination system has the potential to bring clean drinking water in remote areas, who suffer from water scarcity.
MIT and Shanghai Jiao Tong University said their system could be deployed easily and quickly in areas affected by natural disasters, aiding relief efforts around the world. The help would allow many people to relax a little and find the right peace of mind.
