USA: The Air Conditioning, Heating and Refrigeration Technology Institute (AHRTI) has begun Phase II of its new refrigerant compatibility and lubricants research.
This research aims to identify potential compatibility concerns that may result from interactions between low-global warming potential refrigerants and blends with current HVACR system materials and lubricants.
Phase II efforts will include further chemical stability testing and the material compatibility testing of elastomers, gaskets, polymers, and motors.
The Phase I report, published in March, showed good overall chemical stability across the 12 refrigerants evaluated. Only a few instances of reactivity were observed, as well as other subtleties in the interactions (physical and chemical) between the refrigerants, lubricants, and materials.
The refrigerants tested were:
Overall, good chemical stability was observed across the refrigerants evaluated, with only a few instances of reactivity observed, as well as other subtleties in the interactions (physical and chemical) between the refrigerants, lubricants, and materials.
Four refrigerants were noted to have potential for increased reactivity relative to other refrigerants. R13I1 (CF3I), contained in R466A, was found to have significant reactivity when evaluated at elevated temperatures with PAG, POE and PVE lubricants.
The full report Phase l report is available here.
Thermal and chemical stability of low GWP refrigerants is study aim – 12 August 2020
USA: The Air Conditioning, Heating, and Refrigeration Institute’s research arm is to study the thermal and chemical stability of low GWP refrigerants with lubricants, and their long-term compatibility with materials. Read more…