What Is Solar Pond? Advantages of Solar Energy and Solar Technology

What Is Solar Pond? Advantages of Solar Energy and Solar Technology

Solar Pond is one of the most promising technologies in solar energy utilization for varied purpose. It is a large extent energy collector with internal heat energy by various ways, such as course of action heating, refrigeration and drying.

Air becomes lighter of rises above when heated Similarly, When water is heated by the sun ray, hot water from the bottom of the pond rises and its reaches the surface, and loses at all event heat it has attained from the air. The consequence is that the pond water remains at nearly atmospheric temperature. To prevent this heat loss by convection in a solar pond, salt is dissolved in the bottom inner of the water. This makes the water too heavy to rise (already when hot) to the surface. consequently the solar energy remains entrapped in the pond.

A solar pond consists of three zones. The top zone or the surface zone remains at atmospheric temperature and has little salt content. The bottom zone is very hot (110 degree C) and salty with specific gravity of about 1.20. It is this zone which collects and stores the solar energy in the form of heat and is, consequently, known as storage zone. Separating these two zones is the gradient zone that acts as a transparent insulator, permitting sunlight to reach the bottom zone and its thermal energy to keep entrapment there. The useful energy is then withdrawn from the solar pond in the form of heat.

Solar pond have three major advantages over the other solar technologies.

1. They have a low cost per unit area.

2. They can be constructed over large areas enabling the diffused solar radiations to be concentrated on large extent.

3. They can supply energy already during the monsoon season.

India is the first Asian Country to have a solar pond in Bhuj (Gujrat). The Bhuj solar pond has been designed to supply about 220 million kilowatts of thermal energy per annum, about 1,25000 kilowatts of electricity per annum, and about 80,000 liters of potable water per day.

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