Case Studies Control of Computer Room Air Handlers Using Wireless Sensors - Franchise Tax Board

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Control of Computer Room Air Handlers Using Wireless Sensors - Franchise Tax Board

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This project demonstrated how a wireless sensing network, provided by Federspiel Controls, can be used to directly control computer room air conditioning devices. Several air management improvement strategies were also implemented, e.g., air curtains, that worked together with the control system to achieve significant energy savings. Using the wireless sensors, fan speed and chilled water flow were adjusted to provide the optimal amount of cooling to the IT equipment. Changes were made incrementally to compare the effect of each measure on energy performance. Annual data center energy consumption was reduced by 475,239 kWh, which is over 21% of its original baseline energy use. This energy reduction results in eliminating more than 400 Tons of CO2 greenhouse gas emissions per year. Total project cost amounted to $134,057 with an annual savings of $42,772 resulting in a payback period of 2 ¼ years, after including rebates. The demonstration was hosted at California’s State Franchise Tax Board data center in Sacramento, CA.

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