[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
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