Layout is not symmetric and even if it is symmetric less pressure drop in smaller condenser will distribute uneven flows. This is the reason why I will have a ball valve
( pressure drop through globe valve is 0.6 psi which can effect vacuum pump performance)to adjust for optimum performance. This will also help us to take smaller condenser out of service at low capacity runs.
Katmar & Art did not mention about piping symmetry in their previous post. " Condenser will create vacuum and suck according to their heat transfer capability".
I don't understand why equalization lines will lead to more vapor losses. Main condenser is BJ21M type shell. Lets say if 80% percent of vapor is condensed by main condenser and 20% by small one. If I increase vapor rate, main condenser pressure drop will increase and flow diverts to less pressure side (small condenser which still has additional room to condense).
Limiting factor is shell side heat transfer coefficient and I don't have chilled water capacity to switch from cooling water to chilled water and it is not economical.
Will the liquid flow through anti syphon vent line since its height below the level of condenser drain nozzle? Please comment.
I will post my sketch with dimensions in couple of days. Thanks again for putting up such a great discussion.
Edited by Mahesh@A&M, 24 June 2010 - 07:44 PM.