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CHICAGO, IL--As R-22 is phased out, system designers using flooded evaporators in low temperature systems likely will turn to R-507 as perhaps the only viable alternative to ammonia due to concerns about fractionation of other possible HIFC replacements, according to the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE).
Compressor designers, refrigeration component manufacturers, and system designers will need solubility and viscosity data for R507 series in combination with polyolester or polyalkylene glycol lubricants. No such published data currently exist, but research to provide this information has been approved for funding by ASHRAE.
ASHRAE approved funding totaling $575,383 for seven research projects in the areas of design tools, operation and maintenance tools, indoor air ...