Thermosiphon

An example of a passive solar thermal heating system method is a Thermosiphon. It is based on the principle of natural convection, in which air or water is circulated in a vertical closed-looped circuit without using a pump. Air or water is heated by solar radiation and as it becomes less dense it rises and is replaced by cooler air or water.

Thermosiphon Air Heating

A popular thermosiphon system used in homes is called the thermosiphoning air panel collector. Solar radiation heats the cold room air which enters in at the bottom of the collector. The warmer air rises (being replaced by more cooler air at the bottom) and is then released back in to the room through a vent.

Thermosiphon Water Heating

--Fatima 12:39, 5 October 2007 (PDT) Template:Stub