I want to model adiabatic humidifier. According to this post, EvaporativeCooler:Direct:ResearchSpecial seems to be the most appropriate.
For ASHRAE90.1 Appendix G compliance, if the proposed design includes humidification then the baseline building design shall use adiabatic humidification, but the problem is that the proposed case and the baseline case has different HVAC systems.
My proposed case has DOAS. The adiabatic humidifier is installed after the heating coil of the DOAS. I can model it as per design. The indoor setpoint in heating is 22ºCDB, 40%RH (or more). The outdoor air is humidified only when heating.
The HVAC sytem of my baseline case is System 8—VAV with PFP Boxes. I'm going to add EvaporativeCooler:Direct:ResearchSpecial after AirTerminal:SingleDuct:ParallelPIU:Reheat. Is this correct?
Besides, I need to calculate Cooler Design Effectiveness for the baseline case. I thought about Step 1 to 5 below to calculate it. Is this approach correct?
Could you correct me if I'm wrong?
Cooler Design Effectiveness = (DBin - DBout)/(DBin - WB), according to Engineering Reference. The proposed case and the baseline case should have different Cooler Design Effectiveness to meet the same indoor setpoint.
The original PDF is here in case the text in the above psycrometric charts is too small to read.
