[Equest-users] Under sized cooling coil

[Eddie Corwin]

One quick and easy fix is to increase the sizing factor found in the cooling 
tab.  Currently you have it set to 1.15.  I tried setting it to 2.0, and there 
were no more unmet hours.  
 __________________________________________________________
Eddie Corwin, Energy & Sustainability Engineer
ALTANOVA - www.altanova-energy.com
41-41 24th Street - 4th Floor - Long Island City, NY 11101


T: (347) 410-9049
E: ecorwin at altanova-energy.com





________________________________
From: Brad L. Huff <BradH at BVHis.com>
To: "equest-users at lists.onebuilding.org" <equest-users at lists.onebuilding.org>
Sent: Tue, October 19, 2010 5:02:26 PM
Subject: [Equest-users] Under sized cooling coil

 
All,
 
I am modeling a portion of a 100% outside air lab in a type 5A climate zone. The 
area is below ground/has interior walls so there is no fenestration. The system 
has two chilled water air handling units and VAV boxes with zone reheat. The two 
AHU’s run 24/7 at a constant CFM because the supply air is driven by a required 
air change rate per room type. 

My problem is:
-     I have too many unmet cooling hours when allowing e-Quest to auto-size the 
cooling coil capacity of the air handling units
Diagnosis:
-          The delta T of the cooling coil never gets above 7 degrees F any day 
of the summer.
-          e-Quest severely undersized the cooling coils from a design day. (I 
have calculated the design day cooling load by hand)
-          No warnings in the Sim report
 
I have tried troubleshooting the system for a couple of days but am unable to 
find the reason e-Quest is under sizing the cooling coil capacity. I have 
attached the .inp file. Any suggestion are greatly appreciated.
 
Thank you,
Brad
Brad Huff, E.I.T., Mechanical EngineerI BVH Integrated ServicesI 860.286.9171 
tel I860.242.0236 fax I50 Griffin Road South, Bloomfield CT 06002 I 
www.bvhis.com 
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