Variable-Speed Screw Chiller
GPG-031, Updated November 2017
GPG, in collaboration with Oak Ridge National Laboratory researchers, evaluated a recent development in chiller technology, the variable-speed direct-drive screw (VSS) chiller, against a baseline state-of-the-art chiller technology, the variable-speed magnetic bearing chiller (MBC). Results from measurement and verification at the Yates Building in Washington, D.C. showed similar performance for both chillers, supporting the conclusion that both VSS and MBC should be considered for new or end-of-life chiller replacements. Individual site characteristics will determine the most cost-effective chiller technology for a particular application. Click on the infographic below to enlarge.
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