Can you specify and tag which software you are using?
Assuming OpenStudio/EnergyPlus:
General steps for this are:
- Use a setpoint manager scheduled to set a target supply air temperature on your DOAS air loop, e.g. 70F.
- Use a setpoint manager scheduled to set a maximum humidity ratio after your cooling coil, e.g. the humidity ratio corresponding to a dewpoint of 55F.
- Set air loop
Sizing:System object "Type of Load to Size On" to VentilationRequirement. - If you have a zonal radiant system (e.g. radiant slab) that is not integrated with the air distribution as a zone air terminals, you'll also need to set your Sizing:Zone objects for each thermal zone to account for the dedicated outdoor air system and set the design supply air temperatures. Keep in mind that zonal radiant slab object control is tricky in OpenStudio/EnergyPlus; see other posts on the forum for help. You may just want to model slabs as fan coils if it's early stage design.
