Wednesday, 9 September 2015


Most solar water heaters require a well-insulated storage tank. Solar storage tanks have an additional outlet and inlet connected to solar water heater price in Chennai and from the collector. In two-tank systems, the solar water heater preheats water before it enters the conventional water solar water heater price in Chennai heater. In one-tank systems, the back-up heater is combined with the solar storage in one tank.

Three types of solar collectors are solar water heater price in Chennai used for residential applications:

Flat-plate collector
Glazed flat-plate collectors are  solar water heater price in Chennai insulated, weatherproofed boxes that contain a dark absorber plate under one or more glass or plastic (polymer) covers. Unglazed flat-plate  solar water heater price in Chennaicollectors -- typically used for solar pool heating -- have a dark absorber plate, made of metal or polymer, without solar water heater price in Chennai a cover or enclosure.

Integral collector-storage systems
Also known as ICS or batch systems, they  solar water heater price in Chennaifeature one or more black tanks or tubes in an insulated, glazed box. Cold water first passes through the solar collector, which preheats solar water heater price in Chennai the water. The water then continues on to the conventional backup water heater, providing a reliable solar water heater price in Chennai source of hot water. They should be installed only in mild-freeze climates because the outdoor pipes could freeze in severe, cold weather.

Evacuated-tube solar collectors
They feature parallel rows of transparent  solar water heater price in Chennai glass tubes. Each tube contains a glass outer tube and metal absorber tube attached to a fin. The fin's coating absorbs solar energy  solar water heater price in Chennaibut inhibits radiative heat loss. These collectors are used more frequently for U.S. commercial applications.

Solar water heating systems almost always solar water heater price in Chennai require a backup system for cloudy days and times of increased demand. Conventional storage water heaters usually solar water heater price in Chennai provide backup and may already be part of the solar system package. 

A backup system may also be part of the  solar water heater price in Chennaisolar collector, such as rooftop tanks with thermosyphon systems. Since an integral-collector storage system already stores hot water  solar water heater price in Chennaiin addition to collecting solar heat, it may be packaged with a tankless or demand-type water heater for solar water heater price in Chennai  backup.

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