[Equest-users] More about fans

[Steven Savich]

Vikram,

 

Reid Hart of PECI did a presentation on this issue for the building
simulation user's group a few months ago, and discussed a spreadsheet tool
to construct accurate DOE2 performance curves for variable flow air and
water systems.  I believe the powerpoint presentation is still archived on
the BSUG yahoo site, and the spreadsheet is downloadable from PECI's
website.  I haven't tried using this tool yet, so I cannot vouch for its
accuracy or useability.

 

Steven

 

Steven Savich, LEED AP

Systems West Engineers

411 High Street

Eugene, OR  97401-2427

(541) 342-7210

(541) 342-7220 (fax)

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Vikram Sami
Sent: Friday, March 05, 2010 2:01 PM
To: eQUEST Users List
Subject: [Equest-users] More about fans

 

Same model - different fan question. Table G3.1.3.15 Gives you a part load
performance table for VAV fan systems. Based on that, I created a
performance curve (linear) for my VAV fan system that looks like this:

 



 

 

Problem is when I use this as opposed to  the default curve that came out of
the wizard, the fan energy doubles. The fan energy is still only 8% of the
overall building load, so its not alarming. Does this mean that the default
curve was way to low? Is the method above the way to model this performance
curve?

 

Thanks for your help

 

Vikram Sami, LEED AP 
Direct Phone 404-253-1466 | Direct Fax 404-253-1366 

LORD, AECK & SARGENT ARCHITECTURE
1201 Peachtree Street NE, Suite 300, Atlanta, GA 30361 
Responsive Design . Technological Expertise . Exceptional Service 
Please visit our new website |  <file:///\\www.lordaecksargent.com\>
www.lordaecksargent.com

P Think GREEN before you print.

 

 

 

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