UPDATE NOVEMBER 2017
Variable-Speed Direct-Drive Screw Chiller

GPG evaluated a 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 the Oak Ridge National Laboratory (ORNL) showed similar performance for both chillers.

Agencies should consider both VSS and MBC for new or end-of-life chiller replacements. Individual site characteristics will determine the most cost-effective chiller technology for a particular application.

Download Findings

• 1-page infographic

• 4-page brief

• ORNL full report

View Webinar

• On-demand video

• Slides

Additional Resources

• Newsletter: Focus on Variable-Speed Chillers (July 2018)

• Central Plant Best Practices, NREL Resource Map