A Quantitative Comparison of High Efficiency AC vs. DC Power Distribution for Data Centers

A Quantitative Comparison of High Efficiency AC vs. DC Power Distribution for Data Centers


Recent findings suggest that the latest high efficiency AC and DC power distribution architectures are shown to have virtually the same efficiency, suggesting that a move to a DC-based architecture is unwarranted on the basis of efficiency.

This paper explains why by comparing the most efficient DC and AC power distribution methods. Also included is an analysis of the effects of power distribution efficiency on the cooling power requirement and on total electrical consumption.


Neil Rasmussen Chief Technical Officer, APC-MGE Neil is the Chief Technical Officer of APC-MGE. He establishes the technology direction for the world’s largest R&D budget devoted to power, cooling, and rack infrastructure for critical networks. Neil is currently leading the effort at APC-MGE to develop high-efficiency, modular, scalable data center infrastructure solutions and is the principal architect of the APC InfraStruXure system.
James Spitaels Consulting Engineer, APC-MGE James Spitaels is a Consulting Engineer for APC-MGE. He has Bachelors and Masters Degrees in Electrical Engineering from Worcester Polytechnic Institute. During his 16 years with the company he has developed UPSs, communications products, architectures and protocols, equipment enclosures, and power distribution products and has managed multiple product development teams.
Schneider Electric
10 Jul 2009
07 Jan 2007
27 Page(s)
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