Table of Contents
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 is the application of solar still?
Solar stills are the device used to make potable water from the impure water with the help of solar energy. It uses natural evaporation and condensation processes by which many impurities ranging from salts to microorganisms can be effectively removed from sea water to obtain potable water.
What is solar still explain its working principle?
A solar still distills water with substances dissolved in it by using the heat of the Sun to evaporate water so that it may be cooled and collected, thereby purifying it.
What are the two categories of solar still?
Explanation: Active and passive are the two main categories of solar still. Box, cone and pit are the basic configurations of solar still.
What is solar still made of?
Solar stills have been used for thousands of years. The most basic versions are water-filled vessels with black bottoms that absorb the sun’s rays, increasing evaporation of the water inside. Glass or other clear material on top captures the vapor, and the condensate drips into a collection vessel.
How effective are solar stills?
The daily efficiency of modified solar still is obtained 34% and conventional solar still is 22%. Therefore, the increase in efficiency with design modifications was 54.54%.
How does the still work?
A still is an apparatus used to distill liquid mixtures by heating to selectively boil and then cooling to condense the vapor. A still uses the same concepts as a basic distillation apparatus, but on a much larger scale.
How much voltage does a single solar cell produce?
approximately 0.5 volts to 0.6 volts
Individual solar cell devices are often the electrical building blocks of photovoltaic modules, known colloquially as solar panels. The common single junction silicon solar cell can produce a maximum open-circuit voltage of approximately 0.5 volts to 0.6 volts.
How can the efficiency of a solar still be improved?
2. Techniques used to improve the performance of the solar still
- 2.1. Energy storage materials.
- 2.2. Glass cover inclination.
- 2.3. Vacuum technique.
- 2.4. Wick materials.
- 2.5. External reflector.
- 2.6. Sun tracking system.
- 2.7. Basin liner material.
- 2.8. Solar collector incorporated desalination system.
What are the components of a still?
Pot stills consist of three basic components: the large pot, or tank where the corn, grain or other mash is heated, a condenser, which draws the alcohol out of the mash, and a receiving vessel to catch the alcohol as it is distilled.
Why is it called a still?
A still is a tool used to clean a liquid. It does this by first boiling the liquid and turning it into a gas. This gas is then cooled, changing it back into liquid. Stills get their name from the word distillation.
What is the wattage of single solar cell?
Individual solar cell devices are often the electrical building blocks of photovoltaic modules, known colloquially as solar panels. The common single junction silicon solar cell can produce a maximum open-circuit voltage of approximately 0.5 volts to 0.6 volts.
What is the efficiency of solar still?
Is solar distillation same as solar still?
Solar stills are the simplest device that are used to obtain freshwater using solar energy as the sole energy supply. The basic principle of solar water distillation is simple, as distillation replicates the way nature makes rain. In such systems energy is required only to power the circulating water pumps.
What are the different types of stills?
There are essentially two types of still, the pot still and the column still. Of the two, the pot still, also known as the alembic still, is the simplest and not unlike a giant kettle, indeed the Dutch call their pot stills Distilleerketel.
How does a still work?
A Brief Pot Still Primer You cap and seal the pot and heat it. As the liquid heats up, the alcohol in the liquid boils first (because alcohol boils at a lower temperature than water does) and turns to vapor. The alcohol vapors rise up into the head of the still; then they’re drawn off into an arm and then to a coil.
How many types of still are there?
two types
There are essentially two types of still, the pot still and the column still. Of the two, the pot still, also known as the alembic still, is the simplest and not unlike a giant kettle, indeed the Dutch call their pot stills Distilleerketel.
What is the purpose of a double slope Solar System?
DOUBLE SLOPE TYPE SOLAR STILL Department Of Mechanical Engineering Page 7 ABSTRACT The purpose of this project is to design a water distillation system that can purify water from nearly any source, a system that is relatively cheap, portable, and depends only on renewable solar energy.
How does water depth affect the thermal efficiency of solar stills?
When inverted type absorber plate was used thermal efficiency of single slope solar still was increased by 7 %. It was observed that when the water depth increases from 0.01m to 0.03m the productivity decreased by 5%.These results show that the water mass (water depth) has an intense effect on the distillate output of the solar still system.
What are the methods of solar still construction?
Passive Solar Still- Passive methods include the use of dye or charcoal to increase the solar absorptivity of water, applying good insulation, lowering the water depth in the basin to lower its thermal capacity, ensuring vapor tightness, using black gravel and rubber, using floating perforated black plate, and using reflective side walls.
What are the factors affecting the yield of solar still?
The yield of solar still mainly depends on the difference between water and glass cover temperatures which acts as a driving force of the distillation process. Productivity of the solar still also increases with increase in absorber area.