[Equest-users] Inconsistent desing parameters error message for chiller

[Maryanne Mason]

I have been working on a model for a loop-to-loop heat pump system (to a
lake or well), and have been getting the following error message:

 

            Heat-Exchanger: New HP Chiller 1                 has

             inconsistent design parameters:

              QhxDesign   SupFlow     SupTi     SupTo

             -44451328.     3531.      88.1      63.0

                          DemFlow     DemTi     DemTo

                            2973.      63.1      93.0

 

The chiller design criteria is 31800000 cooling, with evap flow at 64 to 44
with 3169 gpm and condenser flow at 85 to 105 with 3743 gpm. The heat sink
for the condenser loop is intended to run from 75 F to 95 F at design
conditions.

 

I am assuming that the negative energy value above indicates that the values
refer to the chiller in heating mode. Can anyone suggest the most like
causes for this error?

 

Regards,

 

MaryAnne Mason 
Mechanical Engineer 
Process Infrastructure 
  
Ausenco Sandwell 
1016B Sutton Drive, Suite 100 
Burlington ON L7L 6B8 
Canada 
  
T   +1 905 319 1698 
F   +1  905 319 1801 
E    <mailto:maryanne.mason at ausencosandwell.com>
maryanne.mason at ausencosandwell.com 
W   <http://www.ausenco.com/> www.ausenco.com 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20100630/8143fe37/attachment.htm>