In EnergyPlus, the ZoneInfiltration objects are not calculated when using the AirflowNetwork (AFN) for the MultiZoneWithoutDistribution control (amongst others). In a previous post[1] it's been suggested that the way to model infiltration in the AFN method, based on the ZoneInfiltration object, is to replace the infiltration objects with enough AFN leakage to get the equivalent infiltration amount of the ZoneInfiltration object. Is there a calculation to figure out this type of conversion out mathematically?
For context, I'm working on a software project where our zones all contain ZoneInfiltration:DesignFlowRate objects, using the Flow/ExteriorWallArea calculation method[2]. So we have the volumetric flow rate m3/s-m2, schedule, constant, temperature and velocity coefficients already defined. We want to include an option to use the AFN for mixed-mode, or purely passive cooling. When this translation is done, we'd like the infiltration rates to be equivalent (or somehow logically translated) from our ZoneInfiltration objects.
Does a formula/look-up table exist to convert the DesignFlowRate to an AFN leakage component, like the AFN:MultiZone:Surface:Crack or AFN:MultiZone:EffectiveLeakageArea objects?
[1] https://unmethours.com/question/39416/airflownetwork-control/ [2] https://bigladdersoftware.com/epx/docs/9-3/input-output-reference/group-airflow.html#zoneinfiltrationdesignflowrate
