Calculating total refrigerant mass [kg]

[yairgre]

Hi All,

If I have a typical system composed of Compressor, Condenser, Evaporator. How do I calculate the total refrigerant mass [kg] i need in my system?

Thanks

[Brian_UK]

You could measure all of the pipework or do what most will do and that is charge it by sub-cooling and/or superheat.