How to get Exfiltration Values (amount of air leaving a zone) in EnergyPlus output files?
I am modeling a 10 floor high residential building using EnergyPlus using AFN. I am using "Surface Average Calculation" as INPUT in AFN:Multizone: Simulation Control (object)
I am trying to access the infiltration through wind and stack effects. EnergyPlus can report "AFN Zone Infiltration Air Changes per Hour" as an output. However, for Exfiltration, it only reports "AFN Zone Exfiltration Heat Transfer Rate". I am interested to see the air getting out from the upper floors.
As for infiltration here is the ach values for a particular zone floorwise
floor 1 -10 (0.715, 0.756, 0.768, 0.772, 0.771, 0.771, 0.765, 0.754, 0.714, 0.600). Infiltration increasing to 4-5 floor and then decreasing to top floor.
Any suggestion or recommendations is highly appreciated regarding Exfiltration values.
Haven't played around with this - just spitballing.
Have you experimented with AFN Linkage Node 1 to Node 2 Mass Flow Rate kg/s? See here. Possibly cumbersome to manage with multiple zone-to-outdoor nodes, but nothing a post-simulation script couldn't automate - I think.