Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I would try placing the cooling tower supply pumps just upstream before the cooling towers on the supply side of the condenser water system (similar to how the chilled water supply pumps are just upstream before the chillers on the supply side of the chilled water system). The cooling tower supply pumps are currently placed on the demand side of the condenser water system, so EnergyPlus may not be properly able to turn them on to meet cooling tower loads.
This is based on the recommendation to place a single pump on the first supply-side branch, from the Engineering Reference section for Plant/Condenser Supply Side:
As previously discussed, the pump establishes the total loop mass flow rate by setting the flow in the first supply side branch.
