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The growing energy consumption of computer data centers has recently received increased economic and environmental scrutiny. A significant portion of typical data center energy consumption can be apportioned to the cooling infrastructure. This paper shows the impact of heat load within the data center on the efficiency of the data center cooling ensemble, as measured in terms of a 'grand' Coefficient...
The information technology industry, and consumers of the products and services stemming from the industry, has benefited from rapidly increasing computational performance for all classes of devices over the past several decades. With increased performance, the industry has also experienced a sharp increase in device-level energy consumption and power density. These trends are expected to result in...
This paper is a continuation of the study (Iyengar et al., 2007) that describes the comparison of numerically-predicted and experimentally- measured temperature distributions in a small data center test cell. The data center cell has a floor area of 900 ft2 and comprises one rack, one air-conditioning unit, and perforated tiles. The Computational Fluid Dynamics (CFD) results in study (Iyengar et al...
Here we present a novel, measurement-based method for characterizing and improving the energy efficiency of a data center (DC). The technique not only yields a clear set of measurement-based best practices metrics, but also provides clear guidance to a DC manager to substantially improve the DC energy efficiency. We describe a technology which exploits the superiority of fast and massive parallel...
Many factors, such as acoustic noise limits and fan reliability considerations, limit the heat dissipation capacity of air-cooled cabinets housing telecommunications or computing hardware. The present work examines the potential of enhanced cooling in a sealed telecommunications cabinet using an evaporating- condensing dielectric mist introduced upstream of heat sinks attached to high-power components...
One of the most important parameters in the optimal ventilation of a raised air cooled data center is the amount of cool air that is delivered to the front of a server. It is very common in data centers for a significant fraction of the conditioned cool air to bypass the desired locations, i.e. the perforated tiles in front of the IT racks, and leak out through cable cutouts and other openings. This...
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