Dear Max,
I think you will want to develop custom part load performance
curves for your AC unit. These curves are used by the DX coil objects,
and while the only coil objects are single and two stage, you probably
have only two stages at the coil and can create an acceptable group of curves
which will simulate your specific performance.
On the other hand, there are so many variables which
affect performance that I would not spend too much time trying to make the coil
/ AC unit curves too detailed.
The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of mepstein68@xxxxxxxxxxxxxx
Sent: Tuesday, July 06, 2010 4:25 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Multi-Stage AC Units
Hello, I'm considering using EnergyPlus for a modeling task I
have. Are there any objects which can model a large packaged rooftop AC unit
with three or four (scroll) compressors? Searching through the engineering
reference doc I only found references to single and two-stage cooling equipment
objects.
Thanks,
Max
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