[Equest-users] process load sign and free cooling

[James Hansen]

The eQuest help file says that for chilled water loops (and most other
loops), a process load sign does not matter - the program automatically
assumes it is a heat load to the loop.  However, I am trying to model
chilled water return preheat for a 100% outside air system, and it would
be very convenient if I could actually subtract heat from the loop via a
negative process load.

 

Does anyone know if there is  a work around to this?

 

Likewise, for free-cooling in a chilled water system:  I've always
modeled this by creating a free-cooling chiller (with almost infinite
efficiency), and used load management to force the use of this chiller
when the ambient temperature is below 45 degrees.  However, if I could
impart a negative value to a chilled water loop, then I could simply
create a process load schedule based on weather data, and I could use
that for every free-cooling project with minimal work.

 

Any thoughts?

 

Thanks,

 

GHT Limited
James Hansen, PE, LEED AP

Senior Associate

1010 N. Glebe Rd, Suite 200

Arlington, VA  22201-4749

703-338-5754 (Cell)

703-243-1200 (Office)

703-276-1376 (Fax)

www.ghtltd.com <http://www.ghtltd.com/> 


The information contained in this communication is confidential, may be privileged, and is intended only for the use of the addressee.  It is the property of GHT Limited.  Unauthorized use, disclosure or copying of this communication or any part thereof is strictly prohibited and may be unlawful.  If you have received this communication in error, please notify me immediately by return e-mail or by e-mail to ght at ghtltd.com, and destroy this communication and all copies thereof, including all attachments.  Thank you.



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