What is the difference between an open circuit and a closed circuit solar water heating system?

Open circuit: Potable water is heated by the sun in the collector and is then stored within the tank. The water continuously circulates through the collector and the tank due to the thermosiphon principle. www.emcongroup.com

SOURCE: Code of Practice and Register of Products
for Namibian Solar Energy Technologies

 

 

 

closed circuitClosed Circuit: The potable water is stored in the tank which is surrounded by a jacket that is connected to the collector(s). An anti-freeze liquid is heated by the sun, and again continuous circulation through the jacket and the collector is “powered” by the thermosiphon principle. The heat is transferred from the hot liquid in the jacket to the potable water in the tank.

SOURCE: Code of Practice and Register of
Products for Namibian Solar Energy Technologies

 


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