Refrigerant R134a - Properties
- 1,1,1,2-Tetrafluoroethane, R-134a
- Genetron 134a
- Suva 134a
- HFC-134a
is a haloalkane refrigerant with thermodynamic properties similar to R-12 (dichlorodifluoromethane), but with less ozone depletion potential. R-134a has the formula CH2FCF3.
R-134a Properties - Imperial Units
For full table with Specific Volume, Heat Content Enthalpy Liquid and Vapor - rotate the screen!
| Temperature (oF) | Pressure (psia) | Pressure (psig) (*inches mercury below one atmosphere) | Density Liquid (lb./cu.ft.) | Specific Volume Vapor (cu.ft./lb.) | Heat Content - Enthalpy Liquid (Btu/lb.) | Heat Content - Enthalpy Vapor (Btu/lb.) |
|---|---|---|---|---|---|---|
| -150 | 0.07107 | 29.776* | 102.34 | 457.07 | -32.781 | 80.212 |
| -125 | 0.28333 | 29.344* | 99.64 | 123.44 | -25.383 | 83.716 |
| -100 | 0.89915 | 28.090* | 96.89 | 41.52 | -17.939 | 87.245 |
| -75 | 2.3866 | 25.062* | 94.09 | 16.56 | -10.472 | 90.760 |
| -50 | 5.4966 | 18.730* | 91.22 | 7.56 | -2.995 | 94.248 |
| -25 | 11.2964 | 6.9214* | 88.28 | 3.83 | 4.503 | 97.721 |
| -15 | 14.6686 | 0.0555* | 87.08 | 2.99 | 7.518 | 99.109 |
| -10 | 16.6293 | 1.9334 | 86.47 | 2.66 | 9.030 | 99.804 |
| -5 | 18.7906 | 4.0947 | 85.86 | 2.37 | 10.546 | 100.499 |
| 0 | 21.1665 | 6.4706 | 85.25 | 2.12 | 12.067 | 101.195 |
| 5 | 23.7710 | 9.0751 | 84.63 | 1.90 | 13.593 | 101.891 |
| 10 | 26.619 | 11.923 | 84.01 | 1.70 | 15.125 | 102.587 |
| 25 | 36.773 | 22.078 | 82.11 | 1.25 | 19.763 | 104.677 |
| 50 | 60.032 | 45.335 | 78.84 | 0.781 | 27.666 | 108.149 |
| 75 | 93.080 | 78.384 | 75.39 | 0.507 | 35.851 | 111.553 |
| 86 | 111.321 | 96.626 | 73.80 | 0.424 | 39.560 | 113.004 |
| 100 | 138.28 | 123.58 | 71.70 | 0.340 | 44.393 | 114.782 |
| 125 | 198.27 | 183.57 | 67.68 | 0.232 | 53.385 | 117.660 |
| 150 | 276.12 | 261.42 | 63.13 | 0.159 | 62.989 | 119.879 |
| 175 | 375.69 | 360.99 | 57.60 | 0.107 | 73.581 | 120.788 |
| 200 | 502.54 | 487.85 | 49.44 | 0.065 | 86.528 | 118.155 |
R-134a Properites - SI Units
For full table with Enthalpy and Entropy in Liquid and Vapor - rotate the screen!
| Temperature (oC) | Absolute Pressure (bar) | Density Liquid (kg/m3) | Density Vapor (kg/m3) | Enthalpy Liquid (kJ/kg) | Enthalpy Vapor (kJ/kg) | Entropy Liquid (kJ/(kgK)) | Entropy Vapor (kJ/(kgK)) |
|---|---|---|---|---|---|---|---|
| -60 | 0.15935 | 1472.0 | 0.9291 | 24.491 | 261.491 | 0.68772 | 1.8014 |
| -50 | 0.29477 | 1444.9 | 1.6526 | 36.302 | 267.779 | 0.74358 | 1.7809 |
| -40 | 0.51225 | 1417.0 | 2.773 | 48.631 | 274.068 | 0.79756 | 1.76448 |
| -30 | 0.84379 | 1388.2 | 4.4307 | 61.130 | 280.324 | 0.84995 | 1.75142 |
| -20 | 1.32719 | 1358.4 | 6.7903 | 73.833 | 286.513 | 0.901 | 1.74113 |
| -10 | 2.00575 | 1327.4 | 10.047 | 86.777 | 292.598 | 0.95095 | 1.73309 |
| 0 | 2.,92769 | 1295.1 | 14.433 | 1000.0 | 298.536 | 1 | 1.72684 |
| 10 | 4.14571 | 1261.2 | 20.226 | 113.540 | 304.276 | 1.04834 | 1.72196 |
| 20 | 5.71665 | 1225.5 | 27.773 | 127.437 | 309.756 | 1.09613 | 1.71806 |
| 30 | 7.70132 | 1187.5 | 37.517 | 141.736 | 314.892 | 1.14354 | 1.71473 |
| 40 | 10.1648 | 1146.7 | 50.055 | 156.491 | 319.575 | 1.19073 | 1.71152 |
| 50 | 13.1773 | 1102.2 | 66.234 | 171.778 | 323.652 | 1.23794 | 1.70792 |
| 60 | 16.8156 | 1052.9 | 87.346 | 187.715 | 326.896 | 1.28548 | 1.70325 |
| 70 | 21.1668 | 996.49 | 115.564 | 204.515 | 328.941 | 1.3339 | 1.6965 |
| 80 | 26.3336 | 928.78 | 155.130 | 222.616 | 329.095 | 1.38434 | 1.68585 |
| 90 | 32.4489 | 838.51 | 216.936 | 243.168 | 325.655 | 1.43978 | 1.66692 |
| 100 | 39.7254 | 649.71 | 367.064 | 273.641 | 309.037 | 1.5198 | 1.61466 |
1,1,1,2-Tetrafluoroethane - R-134a - is an inert gas used primarily as a high-temperature refrigerant for domestic refrigeration and automobile air conditioners.
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Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort.
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