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RE: [EnergyPlus_Support] ASHRAE Compliant Fans and Pumps

You're going to want to adjust your Static Pressure DeltaP. Once you
have your Watts for the Baseline from auto sizing the flow you can use
DeltaP[Pa] = Power[W]*Eff/Flow[m3/s]

Since ASHRAE is telling you Flow and Power you have to solve for static.

Alan Jackson, LEED AP
KlingStubbins

-----Original Message-----
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of eddiecorwin
Sent: Tuesday, June 29, 2010 11:13 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] ASHRAE Compliant Fans and Pumps

I am curious as to how people have gone about modeling ASHRAE compliant
pumps and fans.  

The pumps seem relatively strait forward, run the model, see what the
flow is, then enter in a wattage that equates to 22W/GPM.  The fans,
however, do not have an input for the rated wattage.  The only option I
see is to alter the fan's Motor Efficiency until you get close to the
correct W/CFM.  

Are these the same methods people have applied in the past, or is there
a better way to the the correct W/GPM and W/CFM?



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Primary EnergyPlus support is found at:
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