For southern export markets, thermosiphon solar systems are particularly suitable because they are technically less complex and thus cause lower costs. Thermosiphon systems – also known as gravity or natural circulation systems – work without supplying pumps and electrical control, and this because of the density difference of hot and cold heat transfer fluid.
The aim of a joint project of the CitrinSolar Energie- und Umwelttechnologie GmbH with the University of Ingolstadt is to develop a close-to-production and market-oriented prototype thermosiphon system. Known technical issues such as the "Reverse Thermosiphoning" - the reverse flow direction - should be remedied where possible.
The result is a prototype system, designed to target physical interrelations to reduce the "Reverse Thermosiphoning" and which requires no additional valves to control the flow direction. Through a good set of collector characteristics with the boiler size, the convenience for the user increases. The developed-production prototype is now ready for a market launch.
