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Variable Speed Maglev Chiller

FINDINGS #09, December 2013

 

Magnetic levitation chiller compressors improve the energy efficiency of air conditioning systems while minimizing the negative impacts of excess heat, noise and vibration. A recent GSA evaluation of this technology resulted in an overall energy savings of 42.3% and a simple payback period of less than five years compared to installation of a comparable rotary-screw chiller. Click on the infographic below to enlarge.

GPG Findings 09, December 2013, Variable-Speed Magnetic Levitation Chiller Compressor. Opportunity: How much energy is used for space cooling in U.S. office buildings? 10% of energy goes to space cooling. 32% of commercial buildings rely on chillers to provide this cooling. Technology: How do maglev chillers save energy? Eliminate friction with magnetic bearings. Improve efficiency at partial loads with variable speed drive. 35% more efficient than FEMP-designated high-efficiency rotary screw chillers. Measurement and Verification: Where did M and V occur? Pacific Northwest National Laboratory assessed the performance of a variable-speed oil-free centrifugal chiller with magnetic bearings at the George Howard, Jr. Federal Building in Pine Bluff, Arkansas. Results: How did maglev chillers perform in M and V? 42% energy savings as cooling loads decrease, efficiency increases. Quite performance allows chillers to be placed closer to occupant spaces. Less than 5 years payback after normalizing for payment structure and utility costs. Deployment: Where does M and V recommend deploying maglev chillers? End-of-life replacement of rotary screw chillers with maglev chillers.


Reference above to any specific commercial product, process or service does not constitute or imply its endorsement, recommendation or favoring by the United States Government or any agency thereof.
 

 

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