Solar Geyser Systems

Solar water heating (SWH) or solar hot water (SHW) systems comprise several innovations and many mature renewable energy technologies that have been well established for many years. SWH has been widely used in Greece, Cyprus, Turkey, Israel, Australia, Japan, Austria and China.

In a "close-coupled" SWH system the storage tank is horizontally mounted immediately above the solar collectors on the roof. No pumping is required as the hot water naturally rises into the tank through thermosiphon flow. In a "pump-circulated" system the storage tank is ground- or floor-mounted and is below the level of the collectors; a circulating pump moves water or heat transfer fluid between the tank and the collectors.

It's a Low pressure gravity feed system that consists of a vacuum glass tube collector, a storage tank, feeder tank and a flat roof stand. The evacuated glass tubes are filled with water and exposed to the sun, thus heating up the water in the evacuated glass tubes. As the gravity of cold water is heavier than hot water, the hot water in the glass tubes starts rising in the insulated water tank and the cold water in the tank sinks into the glass tubes. As this cycle is repeated, water in the solar tank is heated. This process is known as Thermosiphon and is based on natural convection.