Danfoss has announced a world-first range of microchannel heat exchangers for low-density, alternative refrigerants.

Danfoss said the new technology solves a key design challenge for OEMs transitioning to lower GWP refrigerants such as R1234ze and R515B, especially in large air-cooled chillers using screw and centrifugal compression.

The low density of these refrigerants makes system performance highly sensitive to pressure drops. 

Danfoss said the new optimised microchannel heat exchangers (MCHEs) provide the ideal balance between maximum heat rejection and internal refrigerant pressure drop.

Employing these new heat exchangers, Danfoss said OEMs can transition more easily to low-GWP, low-density refrigerants and realise a 20 per cent reduction in refrigerant pressure drop at the component level.

The ultra-low GWP refrigerant and R515B are growing in popularity for a range of HVACR applications.

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