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RE: [EnergyPlus_Support] Outdoor Air Schedules

Marzia

The Controller:MechanicalVentilation object is what you are looking for and will allow you to set the schedule at the zone level. The controller is a function of your occupancy schedule if you have set it up to calculate based on occupancy. Therefore each zone still has its own schedule. The availability schedule is different in that it only specifies when the object, or DCV is enabled or disabled.

It seems like you have already set things up properly, are you not getting expected results, and if so where is the discrepancy?

To take a step back though, are you using a DOAS? It seems from the way you phrased the question that you actually wan the ability to control OA flow at each zone which is only possible with a DOAS. The OA Controller is only setting the minimum at the OA Inlet and is not directly related to the actual ventilation a zone sees in a mixed air system.


Alan Jackson, LEED AP
KlingStubbins



From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of marziasedino
Sent: Wednesday, April 28, 2010 12:04 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Outdoor Air Schedules




Dear all,
my building model has got multiple thermal zones served by multiple AHUs (approximately each AHU is serving 5 thermal zones). Thermal zones occupancy levels and schedules are different form each other therefore they have different OA requirements.
The Controller:OutdoorAir object allows to specify only one Schedule  for each AHU (Object: Mimimum Outdoor Air Schedule Name) which means that I can't differentiate each thermal zones OA Schedule, which ij my case should follow the occupancy.
If I use the Controller:MechanicalVentilation object I can specify OA rate per person and per area for each thermal zone served by each AHU, but again only one Schedule can be specified (Availability Schedule Name object).
So my questions are:
1) Is there a way to assign OA rate shedules for each single thermal zone?
2) also, is there a report  that I can use to check the zone OA rates per hour?  The Zone Mechanical Ventilation shows the total mechanincal ventilation...
thanks a lot in advance!
marzia






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