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Active Power CleanSource® UPS – The world’s most efficient online uninterruptible power supply system. Servers and their support infrastructure represent one of the fastest growing consumers of electric power in the world. According to a study by Lawrence Berkeley National Laboratory, estimates of worldwide server power consumption, including direct consumption plus cooling and auxiliary equipment requirements, grew from 58 billion kWh in 2000 to 123 billion kWh in 2005. Many of these servers are installed in mission-critical applications that rely on inefficient double-conversion uninterruptible power supply (UPS) technology to provide high availability power. Continued reliance on double-conversion UPS technology for this and other applications worldwide is annually consuming more than 1 billion kWh in excess energy, wasting millions of dollars in excess energy costs, and needlessly producing over one million tons of CO2. Active Power CleanSource UPS utilizing flywheel energy storage is recognized as having the highest efficiency when compared to double-conversion UPS systems. At a loading factor of 100%, the flywheel UPS system has an efficiency of 98% compared to a typical double-conversion UPS system efficiency of 90%. For high reliability, few UPS systems are loaded to 100%. Non-redundant UPS applications typically see loading factors of 80% or less but the efficiency premium is comparable. In applications requiring continuous power (measured as 99.999% or higher power availability - e.g. financial institutions, Internet data centers, etc), redundant UPS systems are the norm and module-loading of 25% or lower is common. In this low-load case, the Active Power flywheel UPS system provides 94% efficiency compared to typical double-conversion UPS systems having efficiency of 84%. To date, Active Power has shipped more than 1,450 flywheels representing 350 MW of installed capacity with accumulated runtime in excess of 27 million hours. We conservatively estimate a loading factor of 60%, UPS efficiency of 97%, and an efficiency premium of 7% over double-conversion UPS to obtain direct energy savings of 314 million kWh. Furthermore, UPS losses are dissipated as heat which must be removed from facilities and requires an additional 25% to 40% power. Assuming an average of 30%, the cooling energy savings for the flywheel UPS system is 94 million kWh for a total energy savings of 408 million kWh and energy cost savings of $41MM (at an average cost of $0.10/kWh). This energy savings represents a reduction in CO2 production of more than 309,000 tons. In 2006, Frost & Sullivan reported a worldwide market for three-phase UPS systems rated 200 kVA and above totaling 17,700 units with revenues of $867 million. UPS systems in this power range cost approximately $175/kW giving an average unit rating of 280 kW yielding a total delivered capacity of 4,954 MW. At least 50% of the UPS market in this power range is dominated by a few players all offering double-conversion technology. Had this fraction of the market purchased high-efficiency UPS systems, direct and indirect energy savings of 1.36 billion kWh could have been realized with a net cost savings of more than $135 million and more than one million tons of CO2 production could have been avoided. Frost & Sullivan projects CAGR of 5.4% through 2012 for this segment of the UPS market indicating that tremendous savings opportunities will continue for energy-conscious organizations.
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