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RE: [EnergyPlus_Support] Multiple AHU

I don't think there is an example file with more than one AHU (or Air
Loop in EnergyPlus).  LgOffVAV.idf would be a good example file to start
with.  Then replicate the entire set of objects that describe the air
loop to have four AHUs instead of one.  The single central plant can
serve all the various demands by setting the splitter/mixer/branches to
include all the coils in the different air loops.  But if all the AHUs
are all similar (in terms of operation, loads served, recirculation,
outdoor air etc), then -- depending on your goals -- it may be okay to
simplify the energy model to have a just a single AHU.  Simpler models
run faster. 

 

Brent

 

 

________________________________

From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Judith Peters
Sent: Wednesday, October 11, 2006 10:00 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Multiple AHU

 

Hi,

I want to thank the EP Support group for all their help. You people are
terrific.

I am having difficulty with the HVAC on a four story building (165,000
square feet). The building has four large AHU each with heating and
coooling coils which use hot water and chilled water supplied from a
central plant. The system is a VAV with reheat at the terminals. I'm not
sure how to set it up. Is there an EnergyPlus sample file that would
resemble this?

Thanks so much for your help.

Judy Peters


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