SOLAR POND
The sun is the largest source of renewable energy and this energy is available in all parts of the earth. It is in fact one of the best alternatives to the non-renewable sources of energy.Solar ponds are large-scale energy collectors with integral heat storage for supplying thermal energy.
In an ordinary pond, the sun’s rays heat the water and the heated water from within the pond rises and reaches the top but loses the heat into the atmosphere. The net result is that the pond water remains at the atmospheric temperature. The solar pond restricts this tendency by dissolving salt in the bottom layer of the pond making it too heavy to rise.Salinity gradient solar pond are essentially low cost solar collector with integrated storage and hence are potential, cheaper alternatives to flat plate collector system in suitable location. solar pond is large reservoier of saline water with the exeptation that a specific salinity or density profile is artificially created and maintained in the pond. A solar pond has three zones. The top zone is the surface zone, or UCZ (Upper Convective Zone), which is at atmospheric temperature and has little salt content. The bottom zone is very hot, 70°– 85° C, and is very salty. It is this zone that collects and stores solar energy in the form of heat, and is, therefore,
known as the storage zone or LCZ (Lower Convective Zone). Separating these two zones is the important gradient zone or NCZ (Non-Convective Zone). Here the salt content increases as depth increases, thereby creating a salinity or density gradient. If we consider a particular layer in this zone, water of that layer cannot rise, as the layer of water above has less salt content and is, therefore, lighter. Similarly, the water from this layer cannot fall as the water layer below has a higher salt content and is, therefore, heavier. This gradient zone acts as a transparent insulator permitting sunlight to reach the bottom zone but also entrapping it there. The trapped (solar) from the pond in the form of hot brine from the storage zone.
Solar ponds have several advantages. They have a low cost per unit area of collection and an inherent storage capacity. Also, they can be easily constructed over large areas, enabling the diffuse solar resource to be concentrated on a grand scale.
The sun is the largest source of renewable energy and this energy is available in all parts of the earth. It is in fact one of the best alternatives to the non-renewable sources of energy.Solar ponds are large-scale energy collectors with integral heat storage for supplying thermal energy.
In an ordinary pond, the sun’s rays heat the water and the heated water from within the pond rises and reaches the top but loses the heat into the atmosphere. The net result is that the pond water remains at the atmospheric temperature. The solar pond restricts this tendency by dissolving salt in the bottom layer of the pond making it too heavy to rise.Salinity gradient solar pond are essentially low cost solar collector with integrated storage and hence are potential, cheaper alternatives to flat plate collector system in suitable location. solar pond is large reservoier of saline water with the exeptation that a specific salinity or density profile is artificially created and maintained in the pond. A solar pond has three zones. The top zone is the surface zone, or UCZ (Upper Convective Zone), which is at atmospheric temperature and has little salt content. The bottom zone is very hot, 70°– 85° C, and is very salty. It is this zone that collects and stores solar energy in the form of heat, and is, therefore,
known as the storage zone or LCZ (Lower Convective Zone). Separating these two zones is the important gradient zone or NCZ (Non-Convective Zone). Here the salt content increases as depth increases, thereby creating a salinity or density gradient. If we consider a particular layer in this zone, water of that layer cannot rise, as the layer of water above has less salt content and is, therefore, lighter. Similarly, the water from this layer cannot fall as the water layer below has a higher salt content and is, therefore, heavier. This gradient zone acts as a transparent insulator permitting sunlight to reach the bottom zone but also entrapping it there. The trapped (solar) from the pond in the form of hot brine from the storage zone.Solar ponds have several advantages. They have a low cost per unit area of collection and an inherent storage capacity. Also, they can be easily constructed over large areas, enabling the diffuse solar resource to be concentrated on a grand scale.
APPLICATION
POWER PRODUCTION
This is the most attractive feature as far as our stat is consider. We have been excessively relying on the availability of monsoon to cater one energy requirements. the uncertainty of monsoon and the increase in power requirements has led to the search for various other methods of production.the solar pond are viable proposition,where sufficient solar energy is avai
lable and a large pond can be created. To generate electricity,heat stored in pond water is piped to an evaporator in which organic fluid are heated and converted into gaseous states (organic fluid are used since their boiling points is much less than that of water . liquid FERON is most widely used organic fluid). The pressure generated by the runs turbine by which electricity is produced . It has also provided economical, but the production cost is slighter higher than the hydroelectric power projects. However this process can produce large quantities of solar power.
lable and a large pond can be created. To generate electricity,heat stored in pond water is piped to an evaporator in which organic fluid are heated and converted into gaseous states (organic fluid are used since their boiling points is much less than that of water . liquid FERON is most widely used organic fluid). The pressure generated by the runs turbine by which electricity is produced . It has also provided economical, but the production cost is slighter higher than the hydroelectric power projects. However this process can produce large quantities of solar power.SWIMMING POOL HEATING
The earliest recorded use of solar pond was that of heat the roman baths 25 (m) years ago. But today the improved technology of the solar pond makes it easier an provides for efficient heating of swimming pool as well as domestic water heating.
The earliest recorded use of solar pond was that of heat the roman baths 25 (m) years ago. But today the improved technology of the solar pond makes it easier an provides for efficient heating of swimming pool as well as domestic water heating.
in houses and swimming pool waters required at temperatures of about 30-40 degree Celsius. The water can be hated in heat exchangers. The Miamisburge pond in U S A, which has an area of about 2000 squares meter and depth of 3m, was constructed to heat and out door swimming pool and a recreational building in winter. It has proved to be very cost effective.
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