[Equest-users] CURVINV Errors

Shaun Martin smartin at shaunmartinconsulting.com
Tue Dec 6 09:45:09 PST 2011


Hi Omar,

To my knowledge Hirsch & co have never properly explained these error
messages to this group.  I regularly find the program won't accept the
design pump values.

Basically the program doesn't like your combination GPM, head, and kW
entries.  Usually, if you let the software autosize the GPM or head (or
both), the error messages will disappear.  

Shaun

Shaun Martin LEED AP
Principal
Shaun Martin Consulting
2060 Pine Street, Vancouver BC V6J 4P8
604-789-1095
smartin at shaunmartinconsulting.com
member CAGBC, ASHRAE

 

-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
omoltay at mimtarch.com
Sent: Tuesday, December 06, 2011 6:55 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] CURVINV Errors

Dear All,

How significant are the following warnings and why are they caused? In our
baseline model we suddenly started having probably around 100-200 of these.

CURINV: Result out of limits for CURVE:
-0.035642  0.078769  1.353483  0.015932 -0.369414  0.000000  0.000000
0.000000
X, Y, and Z:  1.300000  0.000000  1.352446 MMDDHH:   8  26   9
CURINV: No real root for CURVE:
 1  1.353483  0.015932 -0.369414  0.000000  0.000000  0.000000

These are related to our chilled water pumps.

Thanks for any help,

Omer Moltay
Mimta

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