11-09-2014, 09:49 AM
SOLAR DISTILLATION
SOLAR DISTILLATION.pptx (Size: 745.66 KB / Downloads: 40)
INTRODUCTION
In this world the need of pure drinkable water is increases by day by day.
Pure water is also useful for batteries and in hospitals or schools.
There is almost no water left on earth that is safe to drink without purification after 20-25 years.
For this reason, purification of water supplies is extremely important.
SOLAR DISTILLATION
Distillation is one of many processes that can be used for water purification.
Solar water distillation is a solar technology with a very long history and installations were built over 2000 years ago, although to produce salt rather than drinking water.
The process includes evaporation ,separation and condensation of water.
other approaches to water purification and desalination, are photovoltaic powered reverse-osmosis, for which small-scale commercially available equipment is available.
DESIGN OBJECTIVES FOR AN EFFICIENT SOLAR STILL
For high efficiency the solar still should maintain:
a high feed (undistilled) water temperature.
a large temperature difference between feed water and condensing surface.
low vapour leakage.