Evacuated Tube Collector System (ETC)
Eco Shine Solar ETC System works on the basic principle of Black body absorption. Evacuated tubes are made of Borosilicate Glass with special coating to absorb the solar energy.
The gap between the two glass tube is evacuated which results in high level of vacuum, which acts as the best insulation to minimize the heat loss from inner tube. The Sun energy is absorbed due to the black coating on inner tube and the same is transferred to the water inside the tube.
The water on upper side of evacuated Tube becomes hot and lighter, so it starts rising upwards in the tank. At the same time heavier cold water from tank comes downward from lower side of the tube. This phenomenon is called as natural Thermosyphon circulation, which occurs in every tube.
Evacuated Tube is an assembly of two concentric Borosilicate Glass Tubes. The outer surface of inner tube is coated with Al-N/Al using world's latest innovative coating technology called Magnetron Sputtering Technique. This special selective black coating absorbs maximum sun energy and loses minimum energy.
Due to circular shape of tube full area of tube gets sunshine right from morning to evening hence evacuated Tube to be more efficient.