[Equest-users] [eQuest users] packaged variable volume system

[John Aulbach]

Scott:

If you are going from a constant volume system with reheat to a VAV system, you will eliminate a ton of excess heating. The % may be large as you may not have had much heating to begin with.




________________________________
From: Jeremy McClanathan <jmcclanathan at CDiengineers.com>
To: "Tomlinson, Scott" <stomlinson at smma.com>; "equest-users at lists.onebuilding.org" <equest-users at lists.onebuilding.org>
Sent: Tue, March 2, 2010 9:01:30 AM
Subject: Re: [Equest-users] [eQuest users] packaged variable volume system


The first thing I would check is simultaneous heating and cooling.  If it is a problem, check the reset temps and controls of the packaged system.  The packaged unit may be cooling the air, then tempering it at the zone level.
 
___________________________________________
 
Jeremy McClanathan, LEED® AP
CDi ENGINEERS
4200 194th St SW, Ste 200, Lynnwood, WA 98036
P 425-672-1071 | F 425-778-8769 
PPlease consider the environment before printing this email.
 
 
 
From:Tomlinson, Scott [mailto:stomlinson at smma.com] 
Sent: Tuesday, March 02, 2010 8:42 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] [eQuest users] packaged variable volume system
 
I have a question regarding HVAC system types in eQuest.  My baseline building is modeled as a packaged variable volume system (It is a System 5) while my design building is mostly modeled as a bunch of packaged single zone systems.  For some reason I am getting a 70% reduction in gas consumption, even thought my efficiencies are pretty similar.  This reduction seems unreasonable.  Is there something about the packaged variable volume system  in eQuest that I don’t know about?  What type of system do people usually use for a system 5?
 
-          Thanks,
 
__________________________________________ 
Scott Tomlinson, PE, LEED-AP 
Mechanical 
Symmes Maini & McKee Associates, Inc. 
1000 Massachusetts Avenue, Cambridge, MA 02138 
t: 617.520.9438    
f: 617.354.5758 
stomlinson at smma.com 
www.smma.com 
 
 
This email message, including any attachments, is for the sole use of the intended recipient and may contain confidential, proprietary, and/or privileged information, as well as content subject to copyright and other intellectual laws.  If you are not the intended recipient, you may not disclose, use, copy, or distribute the email message or its attachments.  If you believe you have received this email message in error, please contact the sender by reply email, immediately delete this email and destroy copies.


      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20100302/d1d80035/attachment-0002.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 14792 bytes
Desc: image001.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20100302/d1d80035/attachment-0002.jpg>