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. 2017 Feb 17;8:14476. doi: 10.1038/ncomms14476

Table 1. COP and volumetric capacity of selected low-GWP fluids and current HFC and HCFC fluids in the basic, liquid-line/suction-line heat exchanger (LL/SL) and economizer (Econ.) cycles.

IUPAC name Structure ASHRAE designation GWP100 COP/COPR-410A* Qvol/Qvol,R-410A*
        Basic LL/SL Econ. Basic LL/SL Econ.
Hydrocarbons and dimethylether
 Ethane CH3-CH3 R-170 6† ‡          
 Propene (propylene) CH2=CH-CH3 R-1270 2† 1.033 1.053 1.073 0.689 0.694 0.770
 Propane CH3-CH2-CH3 R-290 3† 1.014 1.042 1.058 0.571 0.579 0.640
 Methoxymethane (dimethylether) CH3-O-CH3 R-E170 1† 0.996 1.002 1.035 0.392 0.389 0.427
 Cyclopropane -CH2-CH2-CH2- R-C270 86 1.018 1.021 1.045 0.472 0.467 0.510
                   
Fluorinated alkanes (HFCs)
 Fluoromethane CH3F R-41 116† ‡          
 Difluoromethane CH2F2 R-32 677† 1.038 1.026 1.070 1.084 1.057 1.191
 Fluoroethane CH2F-CH3 R-161 4† 1.026 1.031 1.062 0.601 0.594 0.658
 1,1-Difluoroethane CHF2-CH3 R-152a 138† 0.981 0.989 1.022 0.399 0.396 0.435
 1,1,2,2-Tetrafluoroethane CHF2-CHF2 R-134 1120† 0.967 0.991 1.024 0.348 0.352 0.385
                   
Fluorinated alkenes (HFOs) and alkynes
 Fluoroethene CHF=CH2 R-1141 <1† 0.968 0.977 1.014 1.346 1.336 1.547
 1,1,2-Trifluoroethene CF2=CHF R-1123 3 0.956 0.988 1.014 1.054 1.074 1.230
 3,3,3-Trifluoroprop-1-yne CF3-C≡CH NA 1.4 0.988 1.023 1.042 0.545 0.557 0.616
 2,3,3,3-Tetrafluoroprop-1-ene CH2=CF-CF3 R-1234yf <1† 0.954 1.006 1.020 0.414 0.431 0.474
 (E)-1,2-difluoroethene CHF=CHF R-1132(E) 1 1.016 1.019 1.051 0.591 0.585 0.646
 3,3,3-Trifluoroprop-1-ene CH2=CH-CF3 R-1243zf <1† 0.964 0.997 1.019 0.372 0.379 0.417
 1,2-Difluoroprop-1-ene§ CHF=CF-CH3 R-1252ye§ 2 0.973 0.996 1.021 0.355 0.358 0.392
 (E)-1,3,3,3-tetrafluoroprop-1-ene CHF=CH-CF3 R-1234ze(E) <1† 0.939 0.977 1.004 0.320 0.329 0.360
 (Z)-1,2,3,3,3-pentafluoro-prop-1-ene CHF=CF-CF3 R-1225ye(Z) <1† 0.922 0.972 0.986 0.273 0.285 0.310
 1-Fluoroprop-1-ene§ CHF=CH-CH3 R-1261ze§ 1 0.975 0.983 1.018 0.353 0.351 0.385
                   
Fluorinated oxygenates
 Trifluoro(methoxy)methane CF3-O-CH3 R-E143a 523† 0.957 0.992 1.017 0.366 0.374 0.411
 2,2,4,5-Tetrafluoro-1,3-dioxole -O-CF2-O-CF=CF- NA 1 0.936 0.984 0.998 0.337 0.349 0.376
                   
Fluorinated nitrogen and sulfur compounds
 N,N,1,1-tetrafluormethaneamine CHF2-NF2 NA 20 0.965 1.007 1.027 0.807 0.831 0.937
 Difluoromethanethiol CHF2-SH NA 1 1.010 1.019 1.054 0.582 0.580 0.642
 Trifluoromethanethiol CF3-SH NA 1 0.977 0.997 1.026 0.418 0.421 0.464
                   
Inorganic compounds
 Carbon dioxide CO2 R-744 1.00† ‡          
 Ammonia NH3 R-717 <1† 1.055 1.028 1.080 0.746 0.721 0.791
                   
Current HFCs and HCFCs
 Pentafluoroethane CF3-CHF2 R-125 3170† 0.913 0.979 0.995 0.746 0.784 0.889
 R-32/125 (50.0/50.0) Blend R-410A 1924† 1.000 1.012 1.049 1.000 0.997 1.130
 Chlorodifluoromethane CHClF2 R-22 1760† 1.007 1.008 1.043 0.666 0.658 0.732
 1,1,1,2-Tetrafluoroethane CF3-CH2F R-134a 1300† 0.968 0.993 1.027 0.433 0.439 0.485

Values are for the ‘optimized' cycle model and are relative to the performance of R-410A in the basic cycle. GWP100 are estimated by the method of Kazakov et al.10 unless noted. The fluids are grouped by chemical class and, within classes, listed in the order of increasing critical temperature.

*Values are relative to those for R-410A in the basic cycle; COPR-410A=5.35 and Qvol,R-410A=6.93 MJ·m−3.

†Literature value from Myhre et al.32 or EU regulation2.

‡Fluid would be near-critical or supercritical in the condenser and was not simulated.

§This fluid has cis (Z) and trans (E) isomers; the predicted values of both were the same.