Description of technology
The basic principles of solar water distillation are simple yet effective, as distillation replicates the way nature makes rain.
The sun's energy heats water to the point of evaporation. As the water evaporates, water vapour rises, condensing on the glass surface for collection. This process removes impurities such as salts and heavy metals as well as eliminates microbiological organisms. The end result is water cleaner than the purest rainwater.
Typical efficiencies for single basin solar stills approach 60 percent.
Specific Features
Solar powered water filters are one of the efficient technologies that can replace the machines that require electricity for its working.
With minimum input, water solar water purification systems offer drinking water that is healthy and safe.
Keywords (maximum 5)
Solar still, water purification, Solar thermal
Status of Technology
Laboratory Model
• Free of charge sun energy (during sunlight it eliminates 500 Watt electric consumption per one hour of sunlight)
• There are no moving parts; it is therefore reliable and almost maintenance fre
Areas of application/Business opportunities
Many places are not connected to clean and healthy water lines, various methods are used for transforming it into natural and less polluted sources of water. We require clean water for staying healthy and there is no better way to clean the water than sol
Name of the component
Total area required (sqM)
Solar still production is a function of solar energy (insolation) and ambient temperature. Production rates in the Pakistan can average about 4 liters per day in the winter to over 6 liters per day during the summer, per square meter.
Maintenance requirements
Maintenance of these solar powered purifiers is also simple, as they do not demand use of batteries, moving parts and external electronics. As these filters just need sunlight for their operation, they do not need much cleaning.
Technology transfer terms
Name of the organization
School of Mechanical and Manufacturing Engineering (SMME)-NUST Islamabad
Address/Zip code
PCSIR Head office Constitution Avenue Sector G-5/2
Islamabad, Pakistan
Islamabad / Pakistan
+ 92 51 90856000 / +92 51 90856002