[Equest-users] eQuest Forum Courtesy

[Paul Diglio]

62.1 analysis not necessary.  The DDC airflow station modulates the OA damper to provide the required ventilation air.  In some cases, the airflow station is omitted and the CO2 level is maintained at < 1,000 PPM.

--- On Mon, 8/2/10, Bruce Easterbrook <bruce5 at bellnet.ca> wrote:

From: Bruce Easterbrook <bruce5 at bellnet.ca>
Subject: Re: [Equest-users] eQuest Forum Courtesy
To: "Paul Diglio" <paul.diglio at sbcglobal.net>
Cc: "vidya gowda" <vidyacg at vt.edu>, equest-users at lists.onebuilding.org
Date: Monday, August 2, 2010, 3:19 PM





  
    Is an ASHRAE 62.1
analysis done and confirmed?

Bruce Easterbrook P.Eng.

Abode Engineering



On 30/07/2010 12:41 PM, Paul Diglio wrote:

  
    
      
        
        
        
          
            
              Vidya:

              

You are welcome.  Actually the response to your query was one reason I
wrote the Administrator.

              

My background is as a licensed HVAC contractor, mechanical designer and
energy auditor/CEM/CEA/CBCP.  I have audited many buildings and worked
on multiple designs where a variable air volume air handler was
existing or was specified without any VAV terminal devices.

              

Usually the static pressure of the fan is reset based on a space
temperature - discharge air temperature algorithm.  In a typical
investment grade audit, I will specify that a VFD be installed on the
fan and that the CFM be reduced as the outside air temperature drops,
since we do not need as much air for heating as for cooling.  Remember,
reducing the CFM of a centrifugal fan just 20% will reduce the kW input
almost by half.

              

It is not the best way to control a VFD, but it works, saves energy and
has been approved on many occasions during the incentive review by the
utility company PE.  The sizable incentives that I have received for
this strategy is indicative that it works. I have also returned to the
site during the monitoring and verification phase and the energy
savings have been confirmed.

              

Good luck with eQuest,

              

Paul Diglio

              

              

              

--- On Fri, 7/30/10, vidya gowda <vidyacg at vt.edu>
wrote:

              

From: vidya gowda <vidyacg at vt.edu>

Subject: Re: [Equest-users] eQuest Forum Courtesy

To: "Paul Diglio" <paul.diglio at sbcglobal.net>

Date: Friday, July 30, 2010, 12:17 PM

                

                thanks Paul, 

                

That was kind of you to ask on behalf of the mail equest and energy
modeling users, without this list sometimes it becomes difficult to
work on when you are on your own.. and when people comment that new
users should first learn, this is one of our primary source of
information, if we are not allowed how will we reach to the level where
the established already are???

                

Earlier today, I had personally appologized to all the people who has
replyed to my query saying that next time I would not put up a question
realted to design. But this surely is reconfirming. 

                

thanks it helps get some motivation instead of feeling low with such
comments. 

                

Kind regards, 

Vidya

                
              
              
            
          
        
        
        
      
    
  
  
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