ERV and equipment sizing
Hi,
I have trouble understanding the result of an equipment sizing paired with an ERV in Openstudio :
I add ZoneHVAC:EnergyRecoveryVentilator as the first object in the list of my thermal zone equipments, followed with a Baseboard Convectiv Electric object. Sensible efficiency of the ERV is set to 70%.
A first simulation result give me a certain value for the electric baseboard sizing, let's say 2500W. Now if I change the efficiency of the ERV to zero, one would expect the electric baseboard capacity to increase but it is not the case, the value is still at 2500W, can someone explain me why?
According to the Engineering Reference document, the zone load should increase so I would expect the baseboard capacity to change :
The resulting sensible energy transfer rate is passed to the zone equipment manager and added to the zone load to be met by other heating or cooling equipment.
Thank you
belated comment: I think your quote describes what happens at each time step. For sizing, "each HVAC component sizes itself" (based on the component's own unique sizing subroutine).
@QCeng@Denis Bourgeois FYI - there is an open EnergyPlus issue to account for air system heat recovery in sizing. Perhaps this issue can be expanded for zone system heat recovery (e.g., zone ERVs) as well.
@Aaron Boranian : thanks - I stand corrected !