Deep water source cooling (DWCS) or
deep water air cooling is a form of
air cooling for process and comfort space cooling which uses a renewable, large body of naturally cold water as a
heat sink. It uses water at 4 to 10 degrees Celsius drawn from deep areas within lakes, oceans, aquifers or rivers, which is pumped through the one side of a
heat exchanger. On the other side of the heat exchanger, cooled water is produced.