[Equest-users] Fan Motor Efficiency Change

[Michael Andelman]

Shaded pole motors are typically around 20% efficiency; PSC typically 50%-65% efficiency.  ECM motors average are around 75% efficiency.

 

Mike Andelman

 

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of John Aulbach
Sent: Thursday, July 29, 2010 12:21 PM
To: Chris Jones; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Fan Motor Efficiency Change

 

Chris:

 

These are fractional HP motors. Small motors used to be 84%, but with Electrical commutating motors, I have no idea.

 

John R. Aulbach, PE, CEM

Senior Energy Engineer

  _____  

Partner Energy

1990 E. Grand Avenue, El Segundo, CA 90245
W: 888-826-1216, X254| D: 310-765-7295 | F: 310-817-2745

 <http://www.ptrenergy.com/> www.ptrenergy.com  <mailto:%7C%20jaulbach at ptrenergy.com> | jaulbach at ptrenergy.com

 

 

 

 

  _____  

From: Chris Jones <cj at enersave.ca>
To: equest-users at lists.onebuilding.org
Sent: Thu, July 29, 2010 8:58:01 AM
Subject: Re: [Equest-users] Fan Motor Efficiency Change

Not entirely on topic but what is a typical fan coil motor efficiency?  I have been using 25%. 

At 02:11 PM 7/28/2010, John Aulbach wrote:



Thank you, Jeremy. By "plug and chug", that seemed to be the Parameter that changed in running a test building through Standard, High, and Premium Efficiency.
 
Wouldn't it be nice if some of this stuff was discussed more in the Manuals ??
 
John


From: Jeremy McClanathan <jmcclanathan at CDiengineers.com>
To: John Aulbach <jra_sac at yahoo.com>; Demba Ndiaye <Demba.Ndiaye at setty.com>; "equest-users at lists.onebuilding.org" <equest-users at lists.onebuilding.org>
Sent: Wed, July 28, 2010 10:56:45 AM
Subject: RE: [Equest-users] Fan Motor Efficiency Change

 

I account for motor eff by changing the total eff, where total eff = motor eff * mech eff.  I believe the keyword for total eff in the inp file is SUPPLY-EFF for supply fans.
 
___________________________________________
 
Jeremy McClanathan, LEED® AP
CDi ENGINEERS
4200 194th St SW, Ste 200, Lynnwood, WA 98036
P 425-672-1071 | F 425-778-8769 
P Please consider the environment before printing this email.
 
 
 
From: John Aulbach [ <mailto:jra_sac at yahoo.com>  mailto:jra_sac at yahoo.com] 
Sent: Wednesday, July 28, 2010 10:51 AM
To: Demba Ndiaye; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Fan Motor Efficiency Change
 
Thank you, Demba.
 
But this is for a PUMP. Not a FAN.
 
John
 

 

From: Demba Ndiaye <Demba.Ndiaye at setty.com>
To: John Aulbach <jra_sac at yahoo.com>; "equest-users at lists.onebuilding.org" <equest-users at lists.onebuilding.org>
Sent: Wed, July 28, 2010 10:39:34 AM
Subject: RE: [Equest-users] Fan Motor Efficiency Change
John, 
 
In the INP, it is the “MOTOR-CLASS” input. You see in the INP something like:
 
FLOW             = 300
                NUMBER           = 1
                HEAD             = 80
                MECH-EFF         = 0.776
                MOTOR-CLASS      = HI-EFF
                CAP-CTRL         = ONE-SPEED-PUMP
 
_____________
Demba NDIAYE
 
From: equest-users-bounces at lists.onebuilding.org [ <mailto:equest-users-bounces at lists.onebuilding.org>  mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of John Aulbach
Sent: Wednesday, July 28, 2010 12:34 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Fan Motor Efficiency Change
 
I should know this one, but draw a blank.
 
The Wizard asks if you want Standard, Hi Efficiency, or Premium Efficiency motors for your fan system.
 
How do those show up in the .INP file? That will give me a clue as to what Parameters to modify for changing to PE motors.
 
Thanks.
 
John R. Aulbach, PE, CEM
Senior Energy Engineer

Partner Energy
1990 E. Grand Avenue, El Segundo, CA 90245
W: 888-826-1216, X254| D: 310-765-7295 | F: 310-817-2745
www.ptrenergy.com <http://www.ptrenergy.com/>  | <mailto:%7C%20jaulbach at ptrenergy.com>  jaulbach at ptrenergy.com
 
 
 
 

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Chris Jones
14 Oneida Avenue
Toronto, ON M5J 2E3.
Tel.  416-203-7465
Fax. 416-946-1005

 

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