Propane condenser

[prq123]

We have an air cooled propane condenser. The condenser is located at the high point in the discharge piping of the compressor. The inlet and outlet piping to/from the condenser are from the bottom. Short of CFD analysis, is anyone aware of calculations that can be done to confirm if non-condensables (inerts) can accumulate in the propane condenser?

Our contractor is proposing calculations based on Froude number and buoyancy factors to demonstrate that non-condesables will not accumulate in the condenser, even though the condenser is at the high point in the system.

 

[Chance17]

It seems to me non-condensible accumulation should be based on a chemical analysis.

 

[dcasto]

Ethane in the propane will rise to a high point. Steady state is not always the case. I always put a high point relief point in a refrigeration system. It only needs to be a 1" to 2" line.

Likewise a bottom drain poit to get the butanes out should be installed. Stratification will occur.