[Equest-users] Water cooled condenser loop "zero design flow" error - fixed! PSZ water-to-air heat pump.

[Bishop, Bill]

FYI:
 
I wanted to model a packaged unit with water-cooled heat pump
heating/cooling and heat recovery, but I kept getting an error on my
condenser loop when using a PSZ:
 
***ERROR****************************************************************
*******
             Loop: Effluent HP loop                 has zero design
flow.
             Check input for consistency, or specify design loads.

I didn't get the error when I used the Water Loop HP system type, but it
doesn't allow for heat recovery. I determined that you have to set the
CONDENSER-TYPE to "Water Cooled" (instead of N/A) by manually entering a
User Default value (since the field doesn't allow you to select it from
the drop menu).
 
 
 
The CW loop is modeling effluent water from the discharge of a
wastewater treatment plant.
 
Regards,
 
William Bishop, EIT, LEED(r) AP | Pathfinder Engineers & Architects LLP
Mechanical Engineer
 
134 South Fitzhugh Street
Rochester, NY 14608
T: (585) 325-6004 Ext. 114
F: (585) 325-6005
wbishop at pathfinder-ea.com
www.pathfinder-ea.com
P Please strive to live sustainably.
________________________________

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
Drake.Wahlers at tac.com
Sent: Monday, July 06, 2009 4:47 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] HP Supplemental Heat
 
I'm trying to model Single Zone Heat Pumps with a HW Loop as the
supplemental heat source. But when I run the simulation, I have an error
saying that the HW Loop has "zero design flow"
 
Has anyone experienced this problem? Any help would be appreciated.
 
-Drake
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