Calculating Refrigerant charge........
Calculating Refrigerant charge........
(OP)
When working out the sub-cooled liquid density, do you use the sub-cooled temperature or the saturated pressure liquid density. For example: R134a at 300psig has SCT of 160ºF and liquid density of 61.74 lb./ft^3. However, it is sub-cooled 10ºF. Do I then look up the liquid density at 150º which is 63.81lb./ft^3?





RE: Calculating Refrigerant charge........
Sub-cooling only exists when the system is in operation. Everything is saturated when it's off.
RE: Calculating Refrigerant charge........
To determine the required refrigerant charge for the system I assume a column of liquid in the liquid line. The liquid line would have a fixed volume. To calculate the weight of charge in the liquid line, do I use the sub-cooled temperature density or the saturated temperature density?
RE: Calculating Refrigerant charge........
RE: Calculating Refrigerant charge........
RE: Calculating Refrigerant charge........