Pre-paid Energy M
1 ) INTRODUCTION
The sunlight is the largest source of renewable energy and this energy is abundantly available in all parts of the globe. It is actually one of the best alternatives to the non-renewable sources of energy. Solar energy have been used as prehistoric instances, but in a most simple manner. Prior to 1970, some research and development was carried out in some countries to use solar energy more efficiently, but almost all of this function remained mainly academic. Following the dramatic within oil prices in the 1970s, a lot of countries started to formulate considerable research and development programs to exploit solar power. One way to tap solar energy is usually through the use of solar ponds. Solar ponds are large-scale energy collectors with integral warmth storage for supplying energy energy. It can be use pertaining to various applications, such as method heating, drinking water desalination, refrigeration, drying and power generation. Solar energy is definitely an abundent and renewble energy source. the annual solar powered energy incident with the ground in india is all about 20, 500 times the current electrical energy ingestion. the use of solar power in india has beenVery limited. this is because solar energy is actually a dilute source(average daily solar powered energy incident in india can be 5Kwh/m2 day)and hence has to be collected above large areas resulting in excessive initial capital investment, also, it is an advanced enery supply Hence photo voltaic enery devices must include storage in order to take care of energy needs during nights and cloudy days. this leads to further embrace the capital cost of such devices. one way to get over this problem is to use a large body of normal water for the collegtion and storage of solar energy. this concept is called solar power pond.
2 . PHOTO VOLTAIC POND
1 . A photo voltaic pond can be described as body of water that collects and stores solar power. Solar energy can warm a body of water (that is encountered with the sun), but the normal water loses their heat until some technique is used to capture it. Water warmed by sun expands and rises as it becomes less heavy. Once that reaches the top, the water seems to lose its warmth to the airthrough convection, or evaporates, currently taking heat with it. The colder normal water, which is heavier, moves down to replace the warm water, building a natural convective circulation that mixes water and dissipates the heat. The appearance of solar ponds reduces possibly convection or perhaps evaporation to be able to store the warmth collected by pond. They will operate in almost any environment. 2 . A solar fish-pond can shop solar high temperature much more effectively than a human body of water of the same size because the salinity gradient helps prevent convection power. Solar radiation entering the pond permeates through to the lower layer, which will contains centered salt option. The temperatures in this part rises because the heat that absorbs in the sunlight struggles to move upwards to the surface area by convection. Solar temperature is therefore stored in the reduced layer from the pond. three or more. It is an synthetically constructed normal water pond through which significant temperature rises happen to be caused in the lower parts by protecting against the event of convection currents. A lot more specific conditions salt-gradient photo voltaic pond or non-convecting solar power pond are also used. The solar pond, which can be actually a sizable area photo voltaic collector is an easy technology that uses water- a fish pond between person to four metre distances deep as a working materials for three key functions. four. The solar power pond possesses a heat storage capacity comprising the seasons. The surface area of the fish-pond affects the number of solar energy it may collect. The base of the pond is generally lined with a tough plastic liner made from materials such as black polythene and hypalon reinforced with nylon mesh. This kind of dark area at the bottom with the pond increases the absorption of solar light. Salts like magnesium chloride, sodium chloride or salt nitrate will be dissolved inside the water, the concentration staying densest at the end (20% to 30%) and gradually lowering to almost zero at the very top....