Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I think this is a bug. I updated my idf file to V23-1-0, but the bug still exists.
I have another model which has the same bug i.e., there is a cooling demand and the chiller is on, but the cooling tower is off due to the weird system node temperature in the condenser loop. However, I could not reproduce the bug with simple ExampleFiles. I'm not sure, but some building size might be necessary to trigger the bug.
In the another model, the bug seems to have to do with the condenser loop temperature setpoint. The bug occurs when the Offcet Temperature Difference (i.e., the cooliing tower approach) in SetpointManager:FollowOutdoorAirTemperature is 5.6ºC, but the bug disappears when it is set to 0ºC, but the approach of 0ºC is impossible in reality.
I'd like to report the bug and leave it to the developers to resolve.
| | 2 | No.2 Revision |
I think this is a bug. I updated my idf file to V23-1-0, V23-1-0, but the bug still exists.
I have another model mode which has the same bug i.e., there is a cooling demand and the chiller is on, but the cooling tower is off due to the weird system node temperature in the condenser loop. However, I could not reproduce the bug with simple ExampleFiles. I'm not sure, but some building size might be necessary to trigger the bug.
In the another model, the bug seems to have to do with the condenser loop temperature setpoint. The bug occurs when the Offcet Temperature Difference (i.e., the cooliing tower approach) in SetpointManager:FollowOutdoorAirTemperature is 5.6ºC, but the bug disappears when it is set to 0ºC, but the approach of 0ºC is impossible in reality.
I'd like to report the bug and leave it to the developers to resolve.
UPDATE
I uploaded my idf files showing the same error here. There are 3 different models in total. The access is restricted for now. Although the project names are hidden and the locations are changed for confidentiality, I can only pass the files to EnergyPlus developers to fix the bug. Please let me know your email address to grant access.
The bug affects all of my ASHRAE90.1 Baseline cases.
