DocumentCode :
3601191
Title :
TE-Shave: Reducing Data Center Capital and Operating Expenses with Thermal Energy Storage
Author :
Wenli Zheng ; Kai Ma ; Xiaorui Wang
Author_Institution :
Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA
Volume :
64
Issue :
11
fYear :
2015
Firstpage :
3278
Lastpage :
3292
Abstract :
Power shaving has recently been proposed to dynamically shave the power peaks of a data center with energy storage devices (ESD), such that more servers can be safely hosted. In addition to the reduction of capital investment (cap-ex), power shaving also helps cut the electricity bills (op-ex) of a data center by reducing the high utility tariffs related to peak power. However, existing work on power shaving focuses exclusively on electrical ESDs (e.g., UPS batteries) to shave the server-side power demand. In this paper, we propose TE-Shave, a generalized power shaving framework that exploits both UPS batteries and a new knob, thermal energy storage (TES) tanks equipped in many data centers. Specifically, TE-Shave utilizes stored cold water or ice to manipulate the cooling power, which accounts for 30-40 percent of the total power cost of a data center. Our extensive evaluation with real-world workload traces shows that TE-Shave saves cap-ex and op-ex up to $2,668/day and $825/day, respectively, for a data center with 17,920 servers. Even for future data centers that are projected to have more efficient cooling and thus a smaller portion of cooling power, e.g., a quarter of today´s level, TE-Shave still leads to 28 percent more savings than existing work that focuses only on the server-side power. TE-Shave is also coordinated with traditional TES solutions for further reduced op-ex, and integrated with processor throttling to cap the power draw (i.e., power capping). Our hardware testbed results show that TE-Shave can improve the system performance up to 23 percent.
Keywords :
computer centres; power aware computing; socio-economic effects; thermal energy storage; ESD; TE-Shave; TES; UPS batteries; capital investment; data center capital; energy storage devices; high utility tariffs; operating expenses; power draw; power peaks; power shaving; processor throttling; server-side power; server-side power demand; thermal energy storage tanks; Batteries; Cooling; Electrostatic discharges; Ice; Servers; Uninterruptible power systems; Water heating; Data center; capital expense; operating expense; power capping; power shaving; thermal energy storage;
fLanguage :
English
Journal_Title :
Computers, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9340
Type :
jour
DOI :
10.1109/TC.2015.2394381
Filename :
7017504
Link To Document :
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