Deep water source cooling
Deep water source cooling (DWSC) or deep water air cooling is a form of air cooling for process and comfort space cooling which uses a large body of naturally cold water as a heat sink. It uses water at 4 to 10 °C (39 to 50 °F) drawn from deep areas within lakes, oceans, aquifers or rivers, which is pumped through the one side of a heat exchanger, which cools warm water on the other side of the exchanger.