[Equest-users] Hours outside Thrl-Range

Rich Tesoriero RTesoriero at swinter.com
Wed May 27 13:34:17 PDT 2009


David,
There is a lot of speculation on this, and unfortunately I'm going to add to 
it.  

At a recent training, Marlin Addison explained that the denominator hours is 
equal to the fan hours on on the SS-E report.

In DOE-2 Help file I found this definition within the BEPS REPORT on the 
"Percent Hours...":

"...is the percentage of hours when the temperature in any conditioned zone 
is outside the zone thermostat's throttling range.  This is a measure of the 
HVAC system's ability to hold thermostat setpoints."

Based on the "any conditioned zone" clause, I'd speculate that the numerator 
is similar.  In both cases, the program is looking across the building for 
each hour to determine if any fan is on and if any zone is out of range.  

This procedure could be used to determine the percentage, but I dont have an 
easy way to verify it...


Regards,
Rich
 


-----Original Message-----
From: "David Dowling" <David.Dowling at WestPlainsEngineering.com>
To: <equest-users at lists.onebuilding.org>
Date: Wed, 27 May 2009 13:58:28 -0600
Subject: [Equest-users] Hours outside Thrl-Range


Does any one know how the “PERCENT OF HOURS ANY SYSTEM ZONE OUTSIDE OF 
THROTTLING RANGE” from detailed output BEPS is calculated?  I am assuming 
it is the maximum total number of ours any given system zone is not within 
the throttling range divided by 8760.  If this is true, why can’t I seem 
to find the total number of hours from any of the reports to give me this 
percentage?  Any information concerning this is greatly appreciated.

David Dowling
Mechanical Designer
WEST PLAINS ENGINEERING, INC.
1750 Rand Road
Rapid City, SD 57702
Phone: (605) 348-7455  Fax: (605) 348-9445
david.dowling at westplainsengineering.com
www.westplainsengineering.com
 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20090527/917ae973/attachment-0002.htm>


More information about the Equest-users mailing list