[Equest-users] ASHRAE Answer to 22 W/Gal Primary-Secondary Pump Question

[Paul Diglio]

FYI



----- Forwarded Message ----
From: "Hammerling, Steve" 
To: "paul.diglio at sbcglobal.net" <paul.diglio at sbcglobal.net>
Sent: Wed, December 1, 2010 9:05:08 AM
Subject: FW: 90.1-2007 G3.1.3.10 Question

 
Mr. Diglio, 

I received a reply from the chair of the subcommittee that authored Appendix G. 
He notes the following:
 
I have always interpreted that as 22 W/gpm for the entire pumping system so if 
multiple pumps are used they need to add up to 22 W/gpm. It is up to the modeler 
to  decide how to split the 22 W/gpm up.
 
I hope this information is useful to you. 
 
Sincerely
Steve Hammerling
Technical Services Engineer
 
 
 
> *From:*Paul Diglio [mailto:paul.diglio at sbcglobal.net]
> *Sent:* Wednesday, November 17, 2010 10:15 AM
> *To:* ASHRAE (Internet Email)
> *Subject:* 90.1-2007 G3.1.3.10 Question
>  
> Dear Sir or Madam:
>  
> I have a question concerning the pumping power requirement
> in the above section.
>  
> For a primary-secondary loop design, does the 22w/gpm
> include both pumps or is it 22w/gpm per pump?
>  
> Thank you,
>  
> Paul Diglio
> 203-415-0082
>  
 
________________________________
  
 
Steve  Hammerling, Assistant Manager of Research & Technical Services
American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc
1791 Tullie Cir. Atlanta, GA 30329
Direct Line: 678-539-1158     Fax: 678-539-2158     eMail: 
shammerling at ashrae.org     Web: www.ASHRAE.org

 
 
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