What is single slope solar still?
Single slope solar still absorbs the thermal energy from sunlight to distillate polluted water into clean water in an enclosed space. Principal of heat transfer and energy balance were the governing equations for the operation of single slope solar still.
What are the disadvantages of solar stills?
The advantages of such solar distillers are their design simplicity, low installation cost, independent water production and simple maintenance. But they also have several disadvantages such as low efficiency and deposition of salt, scale and corrosion.
What is a simple solar still?
A Solar still is a method of distilling (cleaning) water, using the heat of the sun to evaporate water from soil. Functionally, you’re turning the water from the soil into vapor, and then you collect the condensation to drink. Solar stills can range solar ovens to using a simple tarp over a hole in the ground.
What is an passive solar still 1 marks?
Explanation: A passive solar still is a conventional solar still that solely relies on the sun to distill water. Though the process may be slow it generally has a lower design complexity as compared to an active solar still.
Do solar stills work in the winter?
But shorter days and a drop in the mercury are no reasons why you shouldn’t still look to make your home more efficient and environmentally friendly – because converting solar energy into usable domestic power is still a good way to lower your electricity bills and create a greener home… even in winter.
What happens to water in a solar still?
In a solar still, impure water is contained outside the collector, where it is evaporated by sunlight shining through a transparent collector. The pure water vapour condenses on the cool inside surface and drips into a tank. Distillation replicates the way nature makes rain.
How are solar still made?
Solar water distillation is the process of using energy from the sunlight to separate freshwater from salts or other contaminants. The untreated water absorbs heat, slowly reaching high temperatures. The heat causes the water to evaporate, cool, and condense into vapour, leaving the contaminants behind.
Why is a solar still useful?
Solar stills are used across the world to provide clean, drinkable water to the masses. Some solar stills are used in homes to help reduce energy costs and pollution, while others are used in poverty-stricken areas around the world where there are no other sources of clean drinking water.
What is solar still desalination?
Solar stills are one of the simplest ways of desalination. In solar still, saline water is evaporated by solar heat and condensed to become fresh water. Though it is old, primitive tool, but is still useful for many people. It can be simply made out of low-cost common material, such as plastic sheet or bottles.
How much water can a solar still make?
The solar still can be effectively used to obtain sufficient quantities of good water from salt water in regions where the insulation of solar energy is high. A square foot of still area can produce approximately 1/2 to 3/4 lb of distilled water per day. The only disadvantage is the large amount of space needed.
How does a solar still collect water?
In a solar still, impure water is contained outside the collector, where it is evaporated by sunlight shining through a transparent collector. The pure water vapour condenses on the cool inside surface and drips into a tank.