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Danfoss and ENGIE Refrigeration are developing an R600a (isobutane) chiller prototype featuring an oil-free centrifugal compressor on magnetic bearings. The prototype, based on the Turbocor TNS385, demonstrates a preliminary cooling capacity of approximately 385 kW; validation is ongoing and no commercial launch has been announced.
Sapphire Technologies has begun accepting orders for its High Lift Oil-Free Compressor platform, a two-stage centrifugal unit rated up to 8,000 tons (≈28,135 kW) designed for air-cooled chillers in AI data centers. The California-made compressors handle ambient temperatures up to 60 °C and integrate with 800 VDC power distribution. First commercial deliveries are expected by February 2027.
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