[Equest-users] Error - System Type 8 - VAV or PIUs.

[Brian Fountain]

Take your fan out of the air stream - it is included in the temperature
difference and if you have large fan energy it can represent another couple
of degrees F.

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Kushagra
Juneja
Sent: Thursday, February 21, 2013 11:00 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Error - System Type 8 - VAV or PIUs.

 

Dear all,

There is an error that has come up while simulating a 6 lakh sq. ft. bldg.

"cooling coil leaving temperature must be at least 6F higher than entering
water temp."

The CHW temp is 44 F and I have tried varying the zone supply temperature
from 52 to 60 F. But no luck. The air side system here was PIU or VAV.

However, when I model the same with an FCU at the air side. No error
appears.

Any clues why such strange behavior and how to resolve it?

Thanks in advance

Kushagra 

 

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