[Equest-users] Sim Error

[Bishop, Bill]

Omar,
 
Just guessing here. Using a chilled water system, you probably have a
coil curve called, "CHW-Coil-Cap-fEWB&EWT" as one of your Total Capacity
curves for one or more systems. Look for this in the "Cap Curves" tab
within the Cooling tab of the system(s). For some reason, your chilled
water loop is operating at 77F (EWT - entering water temperature) at
some point in the simulation, which is creating a negative value for the
coil curve. Perhaps your chilled water system is undersized.
 
Regards,
Bill
 
William Bishop, PE, BEMP, LEED(r) AP | Pathfinder Engineers & Architects
LLP
Mechanical Engineer
 
134 South Fitzhugh Street
Rochester, NY 14608
T: (585) 325-6004 Ext. 114
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wbishop at pathfinder-ea.com
www.pathfinder-ea.com
P Sustainability - less is more.
________________________________

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Omar
Katanani
Sent: Thursday, July 01, 2010 1:34 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Sim Error
 
 
Hi all,
 
I am running a simulation but it is not being completed. I am getting
this error in the .sim output file:
 
"Chilled water loop has a coil curve generating a negative capacity
ratio. Check the loop supply temperature, 77.F, for consistency with the
coil curves."
 
Can you please advise on this error; I really did not understand it!
 
Many thanks,
Omar
___________________________
Omar Katanani
Sustainable Design Engineer
Email: omar at ecoconsulting.net
 
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Tel:          +961 (0) 1 971 255
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