[BLDG-SIM] 90.1 Appendix G fan power

Bill Talbert btalbert at aeieng.com
Tue Jun 12 12:55:29 PDT 2007


The final approved version of addendum ac is currently on the ASHRAE
website (http://www.ashrae.org/technology/page/132).
 
Bill Talbert, PE, LEED® AP
Mechanical Systems
Phone: (608) 441-6677
E-mail: btalbert at aeieng.com 

Affiliated Engineers Inc.
5802 Research Park Blvd.
Madison, WI. 53719
Tel. (608) 238-2616
Fax. (608) 238-2614



>>> "Ellen Franconi" <efranconi at archenergy.com> 6/12/2007 2:20 PM >>>

In Addendum ac there is an adjustment for energy recovery for the
Baseline. This addendum hasn’t been adopted yet but it should be soon. 
  

Ellen Franconi, Ph.D.
Energy Analysis Group Manager
Architectural Energy Corporation 
2540 Frontier Avenue, Suite 201 
Boulder, CO 80301 
303-444-4149 
303-444-4304 fax 
http://www.archenergy.com ( http://www.archenergy.com/ ) 
   

From:Michael Andelman [mailto:mike at andelmanlelek.com] 
Sent: Friday, June 08, 2007 1:21 PM
To: BLDG-SIM at gard.com 
Subject: [BLDG-SIM] 90.1 Appendix G fan power 

  
ASHRAE 90.1 2004 Appendix G has pressure credits for filters, but not
for energy recovery devices. 
Thus, it would appear that any situation where energy recovery is
required, the as designed fan system is at a disadvantage since the
baseline fan bhp is calculated without any pressure credit, but the as
design system is sized to include the pressure drop through the energy
recovery device.  I’ve looked for interpretations on this, but could not
find any.  Does anyone know of a ruling on this? 
  
Thanks, 
Mike 

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