• International Engineering and Trading Co

Solar energy for water heating

Solar energy radiation incident on the surface of the earth can be conveniently utilised to meet a major part of our energy requirements. In a solar water heating system, the energy absorber is the flat plate collector measuring about 1 x 2 m. This flat plate collector has the capacity to absorb solar energy equivalent to about 5-6 kWH per day. Solar heat absorbed by the absorber in the collector is transferred to the water circulating inside the riser pipes bonded to the absorber assembly. The circulating water gets heated and is delivered to an insulated storage tank. Re-circulation of the same water through the absorber panel in the collector raises the temperature to 90?C (max) on a good sunny day. The entire assembly of the solar flat plate collector, inter-connecting piping and the insulated hot water storage tank makes up a solar water heating system. "Avin" offers solar water heaters either as (a) thermosyphon systems or (b) forced-flow type solar water heating systems. In a thermosyphon system water circulation is by pressure from an overhead cold water storage tank located at least a foot from the top of the outlet of the system"s hot water tank. This type is best for most applications as power consumption is nil. In a forced-flow system water is circulated by means of a motor pump. This type of system is recommended where constant temperature of water is required.