Volume : III, Issue : XI, November - 2014

Water Purification by Heating Using Solar Power as Fuel

Ahamed . M, Aswin . A, Badrivishal . B, Deventheran . D, Lokesh Kumar . C, Deepak Kumar R

Abstract :

Purification by heating is one of many processes available for water purification, and sunlight is one of several forms of heat energy that can be used to power that process. Sunlight has the advantage of zero fuel cost but it requires more space ( for its collection) and generally more costly equipment. To dispel a common belief, it is not necessary to boil water to 100oC to purify. Simply elevating its temperature, short of boiling, will adequately increase the evaporation rate. In fact, although vigorous boiling hastens the purification process it also can force unwanted residue into the bottom, defeating purification. Furthermore, to boil water with sunlight doesn’t require more costly apparatus than is needed to distill it a little more slowly without boiling. Many levels of purification can be achieved with this process, depending upon the intended application. Sterilized water for medical uses requires a different process than that used to make drinking water. Purification of water heavy in dissolved salts differs from purification of water that has been dirtied by other chemicals or suspended solids. For people concerned about the quality of their municipally–supplied drinking water and unhappy with other methods of additional purification available to them, solar distillation of tap water or ackish groundwater can be a pleasant, energy–efficient option. Solar purification systems can be small or large. They are designed either to serve the needs of a single family, producing from ½ to 3 gallons of drinking water a day on the average, or to produce much greater amounts for an entire neighborhood or village. In some parts of the world the scarcity of fresh water is partially overcome by covering shallow salt water basins with glass in greenhouse–like structures. These solar purification plants are relatively inexpensive, low–technology systems, especially useful where the need for small plants exists. Solar purification of portable water from saline (salty) water has been practiced for many years in tropical and sub–tropical regions where fresh water is scare. However, where fresh water is plentiful and energy rates are moderate, the most cost–effective method has been to pump and purify

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Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

AHAMED .M,ASWIN .A,BADRIVISHAL .B,DEVENTHERAN .D,LOKESH KUMAR .C,Deepak Kumar R Water Purification by Heating Using Solar Power as Fuel International Journal of Scientific Research, Vol : 3, Issue : 11 November 2014

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