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[EnergyPlus_Support] How to model a building with both CAV and VAV systems in the same space
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- Subject: [EnergyPlus_Support] How to model a building with both CAV and VAV systems in the same space
- From: "rowan.blakers" <rblakers@xxxxxxxxx>
- Date: Thu, 10 Dec 2009 00:47:43 -0000
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- Delivery-date: Wed, 09 Dec 2009 17:47:49 -0700
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Hi,
I am trying to model the HVAC system for a new building. The building has two wings, connected by a narrow corridor.
The north wing is served by a constant-volume system. The south wing is open office, primarily served by a VAV system with hot water terminal reheats, but with one zone served by a constant volume AHU.
Heating is supplied by a single boiler, and likewise cooling by a single chiller.
I am using DesignBuilder to do most of the data input, and plan to only edit the IDF files as a last resort. Once I hand-edit the files, it is impossible to take them back into DesignBuilder.
DesignBuilder lets me put in either a multizone VAV or CAV system, but not both into the same building.
Would it be a reasonable approach to model the entire system as a VAV system, and then set the minimum turndown for the North wing to 1.0 (ie. to mimic constant volume)? Is there another way around the DesignBuilder limitations?
Thanks,
Rowan
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