[Trace-users] Warehouse configuration on Ashrae

[Scott Parker]

Karen,

You should refer to the updated ventilation/heating systems added by addendum DN to ASHRAE 90.1-2007.  These are also included in the 2010 version of 90.1, but the system numbering is different.

The fan power for the ventilation system needs to be separate from the heating fan power (e.g. like a wall mounted prop fan and a separate unit heater).  This is now the baseline for 90.1-2007 where no cooling system exists (system is just ventilation and heating).  LEED modeling guideline references this updated system type as well.  By the way, the fan power for the ventilation is very low so if you have a common system for heating and ventilation then you will likely be significantly over on fan power.

http://www.ashrae.org/File%20Library/docLib/StdsAddenda/90_1_2007_dn_do_dp_dq_dr.pdf

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Scott

From: trace-users-bounces at lists.onebuilding.org [mailto:trace-users-bounces at lists.onebuilding.org] On Behalf Of Karen Smith
Sent: Thursday, August 30, 2012 3:57 PM
To: trace-users at lists.onebuilding.org
Subject: [Trace-users] Warehouse configuration on Ashrae

Hi all,

Im a bit confused with the classification of Ashrae 90.1 2007, Im currently modeling a facility of a total of 47,600 SF including a 28,000 SF Warehouse. The facility includes 2 levels of offices, breakrooms, etc and a double height warehouse adjacent to them. The proposed design is composed of   2 AHUs, one for the first floor, one for the second and a only heating and ventilation system based on 2 boilers for the warehouse. According to this, the baseline should be a System 5 Packaged VAV with Reheat, Packaged rooftop VAV with reheat, Direct expansion cooling type and  Hot-water fossil fuel boiler for heating. One system per floor, but my confusion is on the part of the warehouse. Should I model an additional Cool and Heat System for the warehouse even though in the proposed we have it as only heating and ventilation system? If so, does it have to be the same type of system specified (System 5) or can it be System 3 or 4 instead?

Thanks.

Karen Smith
Sustainable Solutions, Inc
(404) 784.7061<tel:%28404%29%20784.7061>

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