[EnergyPlus_Support] Re: An example file of ERV

["eric_zhou1223" <eric_zhou1223@xxxxxxxxx>]

Thank you Mike for this question being still in your memo. I did 
found  the bypass report, eventhough the SVG file keep hided. But 
thank you for your effort.  

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte" 
<mjwitte@...> wrote:
>
> Regarding the bypass air reporting.  Everything looks OK here.  An 
explanation 
> from the heat exchanger expert:
> 
> "The HeatExchanger:Air To Air:Generic object appears to be working 
> correctly in the example file. For the rotary HX (example file as 
is), 
> the air is not bypassed, the wheels rotational speed is varied to 
> maintain an exhaust air outlet temperature equal to the threshold 
> temperature for the time the HX is in defrost. The exhaust/supply 
air 
> temperatures are averages over the time step so the user will not 
see 
> the threshold temperature at the exhaust outlet node, its the 
average 
> exhaust outlet temperature (will be lower than the threshold 
temperature 
> if defrost fraction is less than 1). For the plate heat exchanger 
the 
> supply air is bypassed (and verified in the example file when Heat 
> Exchanger Type is changed to plate). Outlet temperatures are again 
the 
> average over the time step."
> 
> Mike
> 
> 
> On 14 Jun 2006 at 21:46, Michael J. Witte wrote:
> 
> > The drawing error may be a problem with hvac-diagram rather than 
the ERV model
> > -
> >  will look into it.  Also checking on the bypass air reporting.
> > 
> > Mike
> > 
> > 
> > On 11 Jun 2006 at 8:38, eric_zhou1223 wrote:
> > 
> > > Hi all,
> > > 
> > > I am looking into the example file
(v1.3) "HVACStandAloneERV_Economizer" 
> > > and notice something.
> > > The "OA HEAT RECOVERY 1:Heat Recovery Defrost Time Fraction" 
has a 
> > > value 0.3 around, but the "OA HEAT RECOVERY 1:Heat Recovery 
Supply Air 
> > > Bypass Mass Flow" is zero all the time, even after I changed 
the HRV 
> > > type as "Plate". Could anyone explain this?
> > > 
> > > Besides, the SVG can not be seen. A warning says:
> > > 
> > > ERROR - COULD NOT COMPLETE DRAWING! Examine ERR file for 
possible 
> > > explanation. Last error message is: "Diagram pieces not linked 
> > > (upstream): OA HEAT RECOVERY 1"
> > > 
> > > Thank you.
> > > Eric
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > > The primary EnergyPlus web site is found at:
> > > http://www.energyplus.gov
> > > 
> > > The group web site is:
> > > http://groups.yahoo.com/group/EnergyPlus_Support/
> > > 
> > > Attachments are not allowed -- please post any files to the 
appropriate
> > folder
> > > in the Files area of the Support Web Site.
> > > 
> > > EnergyPlus Documentation is searchable.  Open 
EPlusMainMenu.idf and press
> > the
> > > "search" button.
> > >  
> > > Yahoo! Groups Links
> > > 
> > > 
> > > 
> > >  
> > > 
> > > 
> > > 
> > > 
> > > 
> > 
> > 
> > ========================================================
> > Michael J. Witte, GARD Analytics, Inc.
> > EnergyPlus Testing and Support      
> > EnergyPlus-Support@...
> > 
> > 
> > 
> > 
> > 
> > 
> > The primary EnergyPlus web site is found at:
> > http://www.energyplus.gov
> > 
> > The group web site is:
> > http://groups.yahoo.com/group/EnergyPlus_Support/
> > 
> > Attachments are not allowed -- please post any files to the 
appropriate folder
> > in the Files area of the Support Web Site.
> > 
> > EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf 
and press the
> > "search" button.
> >  
> > Yahoo! Groups Links
> > 
> > 
> > 
> >  
> > 
> > 
> > 
> > 
> 
> 
> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support      
> EnergyPlus-Support@...
>






------------------------ Yahoo! Groups Sponsor --------------------~--> 
Something is new at Yahoo! Groups.  Check out the enhanced email design.
http://us.click.yahoo.com/SISQkA/gOaOAA/yQLSAA/dkFolB/TM
--------------------------------------------------------------------~-> 

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf and press the "search" button.
 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/