We are blessed with Solar Energy in a abundance at no cost. The solar radiation incident on the surface of the earth can be conveniently utilized for the benefit of human society. One of the popular devices that harness the solar energy is solar hot water system (SHWS).
A solar water heater consists of a collector to collect solar energy and an insulated storage tank to store hot water. The solar energy incident on the absorber panel coated with selected coating transfers that to the riser pipes underneath the absorber panel. The water passing through the risers get heated up and is delivered the storage tank. The re-circulation of the same water through absorber panel in the collector raises the temperature to 80 Degree (Maximum) in a good sunny day. The total system with solar collector, storage tank and pipelines is called solar hot water system.
Broadly, the solar water heating systems are
of two categories. They are : closed loop system and open loop system. In the first one, heat exchangers are installed to protect the system from hard water obtained from borewells or from freezing temperatures in the cold regions. In the other type, either thermosyphon or forced circulation system, the water in the system is open to the atmosphere at one point or
other. The thermosyphon systems are simple and relatively inexpensive. They are suitable for domestic and small institutional systems, provided the water is treated and portable in quality. The forced circulation
systems employ electrical pumps to circulate the water through collectors and storage tanks. The choice of system depends on heat
requirement, weather conditions, heat transfer fluid quality, space availability, annual solar radiation, etc. The SHW systems
are economical, pollution free and easy for operation in warm countries like ours.
BENEFITS TO YOU
This system works all year round, though you'll need to heat the water further with a boiler or immersion heater during the winter months.Sunlight is free, so once you've paid for the initial installation your hot water costs will be reduced.