Essay On Water Distillation

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2.1 Principle A simple way for distillation water is a solar still which uses sun’s heat to derive evaporation from humid soil and atmospheric air to cool a condenser layer. The energy of sun heats water to evaporation point. When the water evaporates, vapours of water increases, condensing on the glass surface for collection. In a double slope solar still, solar radiation passes both sides of the glass cover. This energy coming from the sun is almost absorbed by the black painted basin while it is partially absorbed in the thin layer of salt water. Thus, the solar energy heats the saline water and basin. The heat is convicted from the black surface into the saline water and the saline water temperature raises.
Hence at the interface …show more content…

2.3 Methodology

Solar distillation is one of the most available method for salt water distillation and for run that process sun light is one of the several form of heat energy that can be used to run that process . The purpose behind the solar still is very simple ; salt water inside a basin which is painted black enclosed in a air tight area formed by a glass cover is heated up and evaporated due to solar radiation that passes through the glass cover consequently vapour is directed on the glass and condensed in drinkable water as it comes in contact with inside surface of the cover . Evaporation occurs when molecules of water obtain enough kinetic energy on the surface of the water to change its state from liquids to vapour .Water vapour adds the evaporated molecules between the glass and water and makes a higher temperature difference.
This temperature difference affects the water vapours temperature between the water and the glass which creates natural convection.
A higher temperature difference give support more convection . When vapours directed on the glass cover it will condense due to loss in kinetic energy which is required to be in the vapour

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