Description of Chilled Water Based Cooling Systems

Chilled Water Based Cooling System

Chilled Water Based Cooling System use water chillers, not cooling towers to cool down data centers. The chiller produces cooled water (46°F). The chilled water is pumped through pips from the chiller to a CRAH. CRAH stands for computer air room handler. These units cool the air by drawing warm air from the data center. This heat is removed through chilled water coils with circulating water. The heat removed from the environment flows out of the CRAH and returns to a chiller. From the chiller the water moved to a condenser water loop and is transported to outside air.  The water is recycled over and over.

Chilled water systems

Chilled water systems and CRAH units cost less, and contain fewer parts. Because data centers run 24 hours, 7 days a week, CRAH units have the same environment carbon footprint as CRAC systems, but remove heat better. Water pipes that are chilled can run very long distances. They are extremely reliable and are usually used in large data centers.