With row-based cooling systems, cooling units are placed directly in the row with the heat dissipating IT equipment racks. The cooling units are of similar dimensions to a standard IT rack but are oriented in the opposite direction relative to airflow. In order to achieve higher efficiencies and greater separation from the surrounding data center, air containment structures (plenums) are sometimes added to the entire row — on the rear and, potentially, the front side of the racks. This paper presents the development of a non-linear flow network model for predicting rack cooling performance in real time for such applications. Experimental work was performed to characterize the various leakage paths through IT racks and the containment systems in order to provide input data to the model. The Capture Index (CI) cooling performance metric is computed for each rack. Finally, flow network results are shown to be in good agreement with those from CFD.

This content is only available via PDF.
You do not currently have access to this content.