Compact Non-pressured Solar Water Heater

Working Principle:

Passive system

Compact Non-pressured Solar Water Heater is open to air and relies on water natural circulation.When water in vacuum tube is heated,it rises naturally into storge tank,while cold water in storge tank flows back to vacuum tubes.The tank must be located above the absorber tubes and the whole system need to be installed on the roof and faces to the sun.