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AirflowNetwork and Construction:AirBoundary interaction?

asked 2020-02-28 12:29:58 -0600

mldichter's avatar

I'm modeling a building that has two airloops serving a single zone. One airloop is for heating and cooling, and the other airloop is for outdoor air. It appears that the AFN can't handle two airloops serving the same zone though, but I thought I could use the Construction:AirBoundary object to split one zone into two having good mixing between with each airloop serving half of the split. Before I went to all the effort to set this up, I wanted to ask if the model will be accurate. I know I'll have to worry about objects based on floor area and exterior surface area and people schedule and etc. but will this work?

As an alternative, is there an easier way to address the problem of the AFN working with two airloops serving one zone?

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answered 2020-03-02 12:06:12 -0600

sspielman's avatar

Are you serving multiple zones with both air loops? If you are just serving one zone you might be able to use one of the HVAC template objects (Zone:PTAC, Zone:FCU, etc)

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@sspielman I'm not sure what you're asking, so I'll make a concrete example. There are conditioned zones A and B in the IDF. The single DOAS airloop serves zones A and B. There is another airloop in the IDF serving only zone A and another airloop in the model serving only zone B for a total of three airloops. Does that answer your first question?

I don't think any of the HVAC template objects will create the AirflowNetwork nodes for the automatically created equipment.

mldichter's avatar mldichter  ( 2020-03-02 17:34:33 -0600 )edit

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Asked: 2020-02-28 12:29:58 -0600

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Last updated: Mar 02 '20