NDLI: Effect of Cold Aisle Containment Leakage on Flow Rates and Temperatures in a Data Center

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Sami, A. Alkharabsheh Saurabh, K. Shrivastava Bahgat, G. Sammakia
Copyright Year	2013
Abstract	Many modern data centers utilize containment systems as a practical and inexpensive thermal management solution. In this paper we investigate the effect of various containment leakage ratios on the flow rates and the temperatures in a representative data center. The modular data center is an actual contained cold aisle system in an experimental laboratory. The numerical model is validated using experimental measurements presented in a previous study for uncontained and contained cold aisle data center configurations [1]. The model takes into account the fan curves in the CRAC and IT-equipment. A commercial CFD code is used to conduct this study. The k-ε model and the Boussinesq approximation are used to model the turbulent airflow and the buoyancy effect, respectively. An approximate overall leakage model in the cold aisle is used in this study rather than a detailed model where the simulated leakage sources include floor tiles, containment surfaces, and racks. Several parametric studies are conducted by varying the leakage ratios ranging between 0% (perfectly sealed containment system) to 100% (uncontained cold aisle). The results are used to investigate the effect of leakage ratios on the flow rates of the CRAC unit and the IT-equipment. Ultimately the effect on the inlet temperatures is also investigated. Leakage in containment system is found to have a critical effect on the containment systems performance. A threshold leakage ratio is found after which the containment system does not have benefits over the conventional uncontained cold aisle system. This approach can be used to characterize the leakage in contained systems.
Sponsorship	Electronic and Photonic Packaging Division
File Format	PDF
ISBN	9780791855768
DOI	10.1115/IPACK2013-73216
Volume Number	Volume 2: Thermal Management; Data Centers and Energy Efficient Electronic Systems
Conference Proceedings	ASME 2013 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems
Language	English
Publisher Date	2013-07-16
Publisher Place	Burlingame, California, USA
Access Restriction	Subscribed
Subject Keyword	Leakage Temperature Turbulence Approximation Computational fluid dynamics Computer simulation Buoyancy Containment systems Flow (dynamics) Data centers Air flow Tiles Thermal management Containment
Content Type	Text
Resource Type	Article

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