Evacuated Tube Solar Water Heater

Listing ID #1913510

Based on the collector system, solar water heaters can be of two types:-
flat plate collectors (fpc) based solar water heaters:- the solar radiation is absorbed by flat plate collectors which consist of an insulated outer metallic box covered on the top with glass sheet. Inside there are blackened metallic absorber (selectively coated) sheets with built in channels or riser tubes to carry water. The absorber absorbs the solar radiation and transfers the heat to the flowing water. There are 60 bis approved manufacturers of solar flat plate collectors.
evacuated tube collectors (etc) based solar water heaters:- evacuated tube collector is made of double layer borosilicate glass tubes evacuated for providing insulation. The outer wall of the inner tube is coated with selective absorbing material. This helps absorption of solar radiation and transfers the heat to the water which flows through the inner tube.