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CORR
2011
Springer

Optimal Power Cost Management Using Stored Energy in Data Centers

11 years 9 months ago
Optimal Power Cost Management Using Stored Energy in Data Centers
Since the electricity bill of a data center constitutes a significant portion of its overall operational costs, reducing this has become important. We investigate cost reduction opportunities that arise by the use of uninterrupted power supply (UPS) units as energy storage devices. This represents a deviation from the usual use of these devices as mere transitional fail-over mechanisms between utility and captive sources such as diesel generators. We consider the problem of opportunistically using these devices to reduce the time average electric utility bill in a data center. Using the technique of Lyapunov optimization, we develop an online control algorithm that can optimally exploit these devices to minimize the time average cost. This algorithm operates without any knowledge of the statistics of the workload or electricity cost processes, making it attractive in the presence of workload and pricing uncertainties. An interesting feature of our algorithm is that its deviation from ...
Rahul Urgaonkar, Bhuvan Urgaonkar, Michael J. Neel
Added 19 Aug 2011
Updated 19 Aug 2011
Type Journal
Year 2011
Where CORR
Authors Rahul Urgaonkar, Bhuvan Urgaonkar, Michael J. Neely, Anand Sivasubramaniam
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