Thermosyphon system is a cost-effective way to heat water with solar energy. It makes use of the natural thermal convection of liquids to transfer the heat from solar collectors to water tank.
The thermosyphon system is comprised of flat plate solar collector (one or two pieces), connected to a solar water tank with a cylinder-type heat exchanger.
The circulation of heat carrier liquid is driven by natural thermal convection. The heat carrier fluid into collector absorber heats up by the solar energy and moves up along the piping to reach the water tank, positioned above the collector. There it passes through the heat exchanger and gives away its heat to the water inside the water tank. As it cools down, the heat carrier then is returned to the collector to repeat the process.