[Trace-users] VAV System Modeling - Carrero

[Robert Vogt]

Rafael,
This pretty straight forward in Trace. I don't have trace in front of me but create two vav systems, one can be shut-off vav, one fan powered vav if that is how you are zoning. On the room air flow tab you can select shut-off vav for any interior room.

A vav RTU can serve both interior and perimeter. Select fan powered vav system and override the interior rooms with shut-off vav terminals from the airflows tab. This may simplify you duct routing. Refer to Trace documentation under Help.

Bob

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>Today's Topics:
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>   1. VAV System Modeling for LEED (Rafael Carrero)
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>----------------------------------------------------------------------
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>Message: 1
>Date: Thu, 16 May 2013 12:55:06 +0000
>From: Rafael Carrero <RC at bala.com>
>To: "'trace-users at lists.onebuilding.org'"
>	<trace-users at lists.onebuilding.org>
>Subject: [Trace-users] VAV System Modeling for LEED
>Message-ID:
>	<376944E8FA23914190A8FE0660DA64F05106F43A at BCE-17.PA.BALA.com>
>Content-Type: text/plain; charset="us-ascii"
>
>Good morning everyone.
>I am modeling a building with 2 DX VAV rooftop units with electric heat. These rooftops serve VAV terminals (on interior spaces) and series fan terminals serving the perimeter. When I try to model this simple system on TRACE, I can select either a Series Fan-Powered VAV system, in which ALL the terminals will have fans, or a Variable Volume system, in which NONE of the terminals will have fans.
>
>I can not model my RTU as it if was 2 RTUs, one for the interior with VAV terminals and one for the perimeter, with FTUs. This would defeat the whole purpose of having a VAV system, as the interior spaces would be most likely a constant volume.
>
>Suggestions?
>Thank you very much in advance.
>
>Rafael Carrero
>B A L A
>Direct: 610 994 9388  |  rc at bala.com<mailto:rc at bala.com>
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