[EnergyPlus_Support] Condenser Loop Flow Rate

["enerdata" <jeff.binks@xxxxxxxxxxxxxxx>]

I have three variable flow chillers and a bypass branch in parallel 
between the condenser demand side splitter and mixer, staged with 
cooling load range based operation.  On the supply side, I have a 
single variable speed intermittent condenser water pump and single 2 
speed cooling tower on the supply side with a bypass in parallel.

The problem is that the cooling tower and pump operate at 100% design 
flow (therefore high energy usage) as though all three chillers were 
operating, even when only one chiller operates.

I have tried removing the bypass branch on the demand side but his 
generates an error.  What is the correct arrangement of bypass branches 
to simulate the cooling tower and condenser pump flow varying as the 
chillers are switched on and off (to model an arrangement where each 
chiller has it's own condenser water pump)?

Many thanks for your assistance.







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