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Room cooling is an ineffective approach for next-generation data centers. Latest generation high density and variable density IT equipment create conditions that room cooling was never intended to address, resulting in cooling systems that are inefficient, unpredictable, and low in power density. Row-oriented and rack-oriented cooling architectures have been developed to address these problems.
With a row-oriented architecture, the CRAC units are associated with a row and are assumed to be dedicated to a row for design purposes. The CRAC units may be mounted among the IT racks, they may be mounted overhead, or they may be mounted under the floor. Compared with the room-oriented architecture, the airflow paths are shorter and more clearly defined. In addition, airflows are much more predictable, all of the rated capacity of the CRAC can be utilized, and higher power density can be achieved.
