For central air conditioning systems, the copper pipes are pressurized with nitrogen at 40 kilograms of pressure; over 5 days, this pressure dropped by 2 kilograms. Is it acceptable for the amount of refrigerant to be 5 kilograms in such cases?
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For central air conditioning systems, the copper pipes inside are pressurized with nitrogen at 40 kilograms of pressure; these small copper pipes are approximately 40 meters in length. Their pressure dropped by 2 kilograms over 5 days. Is it acceptable to add 5 kilograms of refrigerant to such systems? Physical properties: Unit of R-410A – Molecular weight: 72.58 g/mol. Vapor pressure at 25°C: 1652.9 Kpa.abs; 239.73 Psia. Boiling point (1 atm): -51.53 °C; -60.76 °F. Critical temperature: 72.13 °C; 161.83 °F. Critical pressure: 4926.10 Kpa.abs; 714.5 Psia. Critical density: 488.90 kg/m3; 30.52 1b/ft3. Liquid density at 25°C: 1062.4 kg/m3; 66.32 1b/ft3. Density of saturated gas at 25°C: 65.92 kg/m3; 4.12 1b/ft3
Definitely not! It can’t be kept under pressure (there must be some leakage). Besides, you said the static pressure of the refrigerant is 5 kilograms, but when it’s in operation, that value can reach around 30 kilograms at most