Performance of Solar Still with Different Phase Change Materials

Abstract

Water is basic necessity of man. Fresh water sources are considered to be rivers, lakes and underground water reservoirs. Although, more than two-third of the earth is covered with water and remaining of the earth is land. However, the use of water from such sources is always not good, because of the polluted environment. All over the world, accessing of portable water to the people is narrowing and decreased day by day. Most of the human diseases are due to polluted or un-purified water. Nowadays, each and every country facing a problem of huge water scarcity because of pollution created by manmade activities. Under these circumstances, search for other sources becomes a must. A system is needed which supplies pure water without effecting the ecosystem and environment friendly. Adequate quality and reliability of drinking water supply is a fundamental need of all people on the earth. Fresh water, which was obtained from rivers, lakes and ponds, is becoming scarce because of industrialization and population explosion. The sun is regarded as the source of energy for its constant duration and hygienic state and its remarkable efficiency of not polluting the environment, as other kinds of energy like coal, oil that cause the pollution of atmosphere and environment. Water purification using solar energy has become more popular because it is eco-friendly and cost effective. A solar still is commonly used device for water purification and it doesn’t require any electricity for distillation of water. A variety of solar distillation devices have been developed with different materials and in different shapes in different location to improve the efficiency of solar distillation. This article communicate about the distillation of solar still by using different methods in different areas to improve the efficiency of the solar still.