[Bldg-sim] Fanwall Air Handlers

[James V. Dirkes II P.E.]

Dear Dan,
 
There's only one "fanwall" manufacturer (Mammoth), so I'd start with them.
However, physics is physics, and motor efficiencies are known from each
motor manufacturer.  Thus, knowing which motor mfr is used will help, as
will the fan curve for all those small backward inclined, airfoil fans.
 
As you may know, plug fans such as are used by fanwalls have (generally)
poor documentation regarding their performance inside a cabinet.  The wall
spacing and direction of discharge (axial vs. radial) affect performance
significantly.  Here again, I'd start by talking to the manufacturing
source.  The local sales rep may not have the info, but Mammoth is pretty
good at their tech support.  
 
Finally, I suspect that the differences in performance from a single fan
application will be rather small and a specific single fan application might
actually give BETTER performance than a fanwall, depending on how close you
are to the curve "sweet spot" for your specific application.  Benefits from
a fanwall are more likely (in my opinion) to be related to space
requirements, redundancy, and sound.
 
Good luck (and please share your findings!)
 

The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653

 

 

  _____  

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Dan Russell
Sent: Friday, November 14, 2008 11:05 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Fanwall Air Handlers



Has anyone had experience with modeling fanwall air handlers and their
proposed efficiency benefits?  The primary efficiency claim is that they
have superior part-load performance due to the ability of their smaller
motors to operate in a range from 60 - 120 Hz optimizing the operation
efficiency.  Does anyone have or know where to get data to build a part-load
curve for this type of fan operation?

 

Thanks,

 

 Dan Russell, EIT 

 

cid:image001.jpg at 01C840A4.E711B250

 

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