MackFri - 125
MackFri® - 125
ASHRAE Name : R-125
The Blends for replacement of halon 1301.
MackFri®-125 refrigerant. Chemical formula СНР2СР3. It does not contain chlorine. Ozone depletion potential ODP = 0, global warming potential GWP = 860. Boiling point at the atmospheric pressure is -48,1 oС. The refrigerant is recomended to use in a clear type or as a component of alternative blends to substitute R22, R502 and R12. R125 refrigerant is fire safe. As to energy performance and heat-transfer coefficient, it plays back to R22 and R502 refrigerants. Compared to R502, it has more abrupt curve characterizing dependence of saturated vapors pressure on temperature, low critical temperature and not high specific temperature of heat-vapor buildup which causes the necessity of increase of the compression level. In connection with this, possibilities of R125 use in the refrigeration equipment using condensers with air cooling are extremely limited.
At the same time, R125 has lower (compared to R22 and R502) discharge temperature and high mass flow under low suction pressures. Piston refrigeration compressors operating on R125 are characterized by optimal cylinder charging, and as a consequence, they have big volume efficiency.
Similar : FE-25, Halocarbon-125
Physical properties:
| Molecular weight |
120.02 |
| Boiling point under 1.013x105Pa,0C |
-48.45 |
| Density of liquuid at 250C,g/cm3 |
1.245 |
| Vapor pressure at 250C,MPa |
1.371 |
| Critical temperature, 0C |
66.05 |
| Critical pressure, MPa |
3.592 |
| Critical density, g/cm3 |
0.571 |
| Latent heat of vaporization at bp., KJ/Kg |
165.0 |
| Solubility in water at 250C, % by weight |
0.09 |
| Specific heat, liquid, 250C, KJ/Kg.0C |
1.26 |
|
Safety:
| Ozone-Depletion Potential (ODR) |
0 |
| Global Warming Potential (GWP) |
860 |
|
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