Table 4: Thermodynamic properties
Refrigerant
R22
R407C
R410A
Vapour pressure (bar) at 25°C
10.4
11.9
16.5
Cooling capacity of liquid (kJ/kg.K) at 25°C
1.24
1.54
1.84
Cooling capacity of vapor (kJ/kg.K) at 1 atm, 25 °C
0.657
0.829
0.833
Temperature glide (°C)
0
7.4
<0.2
POE oil
Polyolester oil (POE) is miscible with HFC's (while mineral oil is not), but has to be evaluated regarding lubrication
ability in compressors. POE oil has better thermal stability than refrigerant mineral oil.
POE is more hygroscopic and also holds moisture more tight than mineral oil. It also chemically reacts with water
leading to acid and alcohol formation.
Scroll compressors, CH290 and CH485 | Refrigerant and lubricants
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