Solar water heater of all glass evacuated tube collector integrated with storage tank,
are ideal for both domestic and industrial applications where cheap and reliable hot
water supply is required. They are simple, economic and practical.
It uses the vacuum collector’s high solar absorption rate and the low emission rate
coating, transforms the solar energy, and absorbs to heat energy. It uses the features
that the cold water density is bigger than the hot water, forms the circulation that the
cold water flows from top to bottom, while the hot water flows from bottom to top in
the vacuum heat collector, and through such circulation, the water temperature
elevate gradually in the water tank.