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How to model a multiple level air treatment ?

asked 2023-11-14 15:15:11 -0600

updated 2023-11-15 12:38:24 -0600

I'm working on an existing building and I would like to know the best way to model his HVAC systems, more specifically the air distribution systems of the building according to their treatment levels. Level 1 brings outside air into the building via AHU 1 and 2 air handling units. They allow energy recovery from the exhaust air thanks to a thermal wheel coupled to a recovery coil. In addition, these AHUs are equipped with cooling coils to dehumidify and precondition the air during the summer. Level 2 conditions mixed air, i.e. a mixture of outside air and return air. This level includes fan coil units (VC) types 1, 2 and 3. AHU 1 is for VC 1 and 2, while AHU 2 is for VC 3. Both AHUs are 100% outside air. The air is mix in the mecanicals room of each stage of the building. I tried to model these systems on OpenStudio. First I've created 2 air loop with the above described equipments for the outside air. then I put Unit:ventilator as they are the VC 1, 2 and 3. But as I understand EnergyPlus simulated sequentialy the zone equipment to meet the internal gain. Thus I think my model does not represent the reality. Do you have any idea how I can improve my model ? image description

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answered 2023-11-15 18:44:04 -0600

Keigo's avatar

How to model PAU connected to multiple AHUs

AirLoopHVAC:DedicatedOutdoorAirSystem example?

I think OpenStudio does not cover AirLoopHVAC:DedicatedOutdoorAirSystem. You can model it with EnergyPlus. You should use the latest version EnergyPlus as it is a relatively new feature and there were many bugs before (You can find my previous posts in this site).

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Asked: 2023-11-14 15:15:11 -0600

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Last updated: Nov 28