Error when using LocalEnvironment objects with airflow network - why?
Hello, I am trying to use the LocalEnvironment objects (both the SurfaceProperty:SurroundingSurfaces and the ZoneProperty:LocalEnvironment) to change the outdoor boundary conditions (air temperature, wind speed and surrounding surface temperature) of specific thermal zones of a naturally ventilated building modelled with the Airflownetwork.
I've used EnergyPlus example idf files for reference. However, after adding the LocalEnvironment objects, I have this kind of sever error with the Airflow-network: The entered number of external nodes is 22. The entered number of external surfaces is 18 This happens even though I don't add any node to the airflow-network.
Anyone has a possible explanation or happen to have the same problem?
Thank you!
I haven't personally used those, but if you upload your IDF it'll help.
Hi Jason, this is the first time I ask a question in UnmetHours and I cannot find where to upload the idf file? The format is not allow as attachment to the message. Sorry for the silly question!
Since IDFs can sometimes be large, it is probably best to consider sharing the file with a link (using Dropbox, for example) rather than directly uploading it. For a direct upload, I think I recall people changing the IDF extension to TXT (since the IDF file is just a text file), but that may not work if the file is too big.
Many thanks, Jason.
Here are the IDF files: https://www.dropbox.com/sh/xg75krheco...
In the file “Cadiz-LocalNode” I have added a SurfaceProperty:LocalEnvironment object and an OutdoorAir:Node (Local_15) to set the hourly windspeed for an external surface (surface 145). In the file “Cadiz_SurroundingSurfaces” I’ve added a SurfaceProperty:LocalEnvironment and a SurfaceProperty:SurroundingSurfaces object for the external surface 145. In both cases, I get the same severe error “GetAirflowNetworkInput: Errors found getting inputs” which terminates the simulation