SWAC (Sea-water air conditioning) aka DWSC (Deep water source cooling) is an innovative and ecological Air Conditioning technology which uses a renewable source of cold water. It is particularly fitted to Islands in the tropical belt as they represent an important cooling need and only a few kilometers away, deep in the ocean is a vast unused reservoir of cold water. The idea of SWAC is to link them together.
Other sources are appropriate for this use. Usually they can be
- Oceans : Natural convection ocurring in the deep ocean results in a cold water layer between 800 and 1000m deep from the surface
- The lakes in temperate areas : The difference of density between cold and warm water allows cold water to naturally stay at the bottom of the lakes (depth of about 50m). The alpine Lakes are a very suited area for SWAC implementation for instance.
- Cold water surface currents (As in Stockolm’s downtown AC system ) or other cold sources.