Item ID: 488
High-Efficiency UPS Equipment for a Data Center
Data Center UPS Equipment: High Efficiency vs. Standard
Installing new, more efficient UPS units as a direct replacement to reduce losses and save energy.
Uninterruptable Power Supplies (UPS) deliver instant power to data centers and/or end use equipment during power supply interruptions. UPS equipment is designed to temporarily provide power to operate data center equipment until emergency power generation comes online or the equipment can be properly shut down. UPS are a necessity in data centers unless servers have their own backup batteries, but conventional UPS are not very energy efficient. While the energy efficiency of UPS technology has increased and continues to improve, designers and operators of data centers may not be aware of these advances and could be wasting energy.
When designing a new data center or when existing UPS equipment fails or is scheduled for an end-of-life replacement, new high-efficiency UPS equipment should be specified. If an existing UPS is older than 10 years, it may be cost-effective to replace it immediately (U.S. DOE, 2008). Specifications for high-efficiency UPS equipment can include the following factors: size of data center and reliability requirements as well as the type and part-load performance.
Through the selection of high-efficiency UPS equipment, data centers can reduce energy waste while maintaining reliability. Improved efficiency of UPS equipment is due in part to improvements in switching technology (insulated-gate bipolar transistor replacing silicon controlled rectifier) and controls (digital signal processing replacing analog control). The efficiency improvement resulting from installing high-efficiency UPS equipment ranges from 0.5% to 7% (LBNL, 2005). Additional benefits of high-efficiency UPS also include reduced facility cooling needs and smaller UPS equipment footprint.
Energy Savings: 3%
Energy Savings Rating:
Limited Assessment What's this?
|1||Concept not validated||Claims of energy savings may not be credible due to lack of documentation or validation by unbiased experts.|
|2||Concept validated:||An unbiased expert has validated efficiency concepts through technical review and calculations based on engineering principles.|
|3||Limited assessment||An unbiased expert has measured technology characteristics and factors of energy use through one or more tests in typical applications with a clear baseline. |
|4||Extensive assessment||Additional testing in relevant applications and environments has increased knowledge of performance across a broad range of products, applications, and system conditions. |
|5||Comprehensive analysis||Results of lab and field tests have been used to develop methods for reliable prediction of performance across the range of intended applications.|
|6||Approved measure||Protocols for technology application are established and approved.|