[Equest-users] PVVT vs. PSZ

[Nicholas Couture, LEED AP]

I'd like to propose an answer my own question to the group and ask if
this makes sense... I'm getting additional baseboard heat in some of the
PVVT zones. 
 
Take the several zones a unit serves.  One of them is the control zone,
same for PSZ and PVVT.  For a PSZ when the control zone is satisfied the
other zones are also satisfied, because there is no additional baseboard
heat, the constant airflow must be keeping the other zones satisfied.
For a PVVT the control zone is satisfied, and airflow reduces and the
other zones are not satisfied requiring additional baseboard heat.
 
 
Nick Couture, LEED AP
Mechanical Engineer  

 

3555 Veteran's Memorial Highway, Suite M
Ronkonkoma, NY 11779
Tel:  631.981.3990 ext. 230
Fax: 631.981.3971
ncouture at emtec-engineers.com


www.emtec-engineers.com <http://www.emtec-engineers.com/> 

This message is intended only for the personal and confidential use of
the designated recipient(s) named above. This is not in anyway an
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________________________________

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
Nicholas Couture, LEED AP
Sent: Tuesday, April 27, 2010 4:39 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] PVVT vs. PSZ


Hello,
 
I'm comparing a PVVT against PSZ systems in the DD wizard mode.  On the
heating side I'm keeping everything the same, that is furnaces at 80%
AFUE and baseboard, all heating settings including the boilers are set
up the same.  I'm getting more fuel use for the PVVT system than the PSZ
system.  Can anyone explain why that is?
 
thanks,
 
Nick Couture, LEED AP
Mechanical Engineer  

 

3555 Veteran's Memorial Highway, Suite M
Ronkonkoma, NY 11779
Tel:  631.981.3990 ext. 230
Fax: 631.981.3971
ncouture at emtec-engineers.com


www.emtec-engineers.com <http://www.emtec-engineers.com/> 

This message is intended only for the personal and confidential use of
the designated recipient(s) named above. This is not in anyway an
official statement of Emtec Consultants or solicitation to buy our
services. Emtec Consultants does not guarantee this Email transmission
to be secure or error-free. Any reproduction or changes to our drawings
and files without the consent of Emtec Consultants is strictly
prohibited.
 
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