MackFri® - 02a
MackFri® - 02a
ASHRAE Name : R-402a
(38% HCFC-22 / 60% HFC-125 / 2% R-290)
The Blends for replacement of R-502.
MackFri®-02a refrigerant. It is a near-zeotrope blend with temperature glide less than 1,6 К. Basic physical qualities are given in the table down. The refrigerant has been developed for retrofit of the equipment charged with R502 and operating on low boiling point (-40 oС), where it is necessary to achieve discharge temperature peculiar to R502. Depending on operation conditions, cold-productivity of the equipment operating on this refrigerant is, as a rule, about 11% higher than that of the equipment on R502. Energy consumption is also a bit higher. MackFri®-02a refrigerant compared to R502 at the same conditions has pressure, which is 13...15 % higher.
MackFri®-02a is compatible with mineral oils, with blends of mineral and alkylbenzene oils, as well as with alkylbenzene and polyester oils. It is recommended to use MackFri®-02a in combination with alkylbenzene oil. During retrofit, a filter should be replaced.
Non-zeotropness of the blend can cause changing of its composition and, correspondingly, impairment of the refrigeration system performance in the process of a continuous operation.
Packing: 12.3 Kg. (27 lb.) Net nonrefillable Steel cylinders and individual neutral carton outside.
6.0 Kg. (13.5 lb.) Net nonrefillable Steel cylinders and individual neutral carton outside.
- Acceptable Substitutes for Class I (CFCs) Substances in Commercial Refrigeration under the Significant New Alternatives Policy (SNAP) Program printed on December 18, 2000 as:
 a) replacement for CFC-502 in the Cold Storage Warehouses (R, N)
b) replacement for CFC-502 in the Ref. Transport (R, N)
c) replacement for CFC-502 in the Retail Food Ref. (R, N)
d) replacement for CFC-502 in the Ice Machines (R, N)
- Acceptable Substitutes for Class I (CFCs) Substances in Non-Commercial Refrigeration under the Significant New Alternatives Policy (SNAP) Program printed on December 18, 2000 as:
a) replacement for CFC-502 in the Industrial Process Refrigeration (R, N)
b) replacement for CFC-502 in the Household Freezers (R, N)
(R) = Retrofit Uses
(N) = New Uses
Similar : SUVA HP80
Physical properties:
| Parameter |
|
| Molecular mass, gm/mole |
101,55 |
| Boiling point at atmospheric pressure, oС |
-49,2 |
| Critical temperature, oС |
75,5 |
| Critical pressure, кPа (abs.) |
4135 |
| Liquid critical density, kg/m3 |
541,7 |
Density at 25 oС, kg/m3:
liquid
saturated vapor |
1132
19,93 |
| Liquid specific thermal capacity at 25 oС, kJoule/(kg*К) |
1,313 |
| Vapors specific thermal capacity at 25 oС and atmospheric temperature, kJoule/(kg*K) |
0,757 |
| Pressure of saturated liquid vapors at 25 oС, кPа (abs.) |
1353 |
| Heat of vaporization at normal boiling point, kJoule/kg |
194 |
| Liquid coefficient of heat conductivity at 25 oС, Wt/(m*К) |
(4,48...9,0) х 10-2 |
| Vapors coefficient of heat conductivity at 25 oС and atmospheric pressure, Wt/mм*К) |
1,21 х 10-2 |
| Water solubility in the refrigerant at 25 oС, mas.% |
- |
| Inflammability level in the air (0,1 МPа), vol.% |
No |
| Ozone depletion potential ODP |
0,02 |
| Global warming potential HGWP |
0,63 |
| Tolerance concentration at inhale (TC), mln-1 |
1000 |
|
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