HIGH EFFICIENCY TIER IV COOLING SYSTEM ARCHITECTURE AND COOLING UNIT FOR FAULT TOLERANT COMPUTER ROOM AIR CONDITIONER (CRAC) SYSTEMS

摘要

A high efficiency Tier IV cooling system architecture and cooling unit for fault tolerant computer room air conditioner systems incorporates a cooling unit which comprises a cold water heat exchange system and a series coupled chilled water heat exchange system. A return air input is coupled to the cold water and chilled water heat exchange systems and a supply air output provides the return air cooled through at least one of the cold water and chilled water heat exchange systems.