Re: [EnergyPlus_Support] Purchased air problems

["Michael J. Witte" <mjwitte@xxxxxxxx>]

Also note that the PurchAirTable example file uses a seasonal thermostat.  
Cooling is only available during April thru September.  The rest of the year 
heating is available.  If you want the system to automatically switch between 
heating and cooling as needed, then use a thermostat with control type 4 (DUAL 
SETPOINT WITH DEADBAND).

Mike


On 11 Feb 2008 at 12:42, Fred Buhl wrote:

> Marzia,
> 
> In the case of PurchAirTable it is most likely due to the
> lack of any infiltration and to the solar gain through an unshaded
> south facing window. The internal gains (people, lights, equip) are
> in the normal range.
> 
> Fred Buhl
> 
> marziasedino wrote:
> > Hi there,
> >
> > I am having some problems in using the "PurchasedAir" in one of my E+ 
> > model, apparently I get unreasonable outputs. 
> > I analysed one of the E+ simplest examples "PurchAirTable" and realized 
> > it shows the same problem: if you run it and check the Mean Air 
> > temperature of the zones you can see the values are too high (up to 30°
> > C) considering the outdoor temperature during the winter season. As the 
> > internal heat gains are reasonable and the weather file I used is the 
> > Venice one (where the solar heat gains are not high enough to justify 
> > such a trend) I wonder if I am forgetting to consider some other 
> > variable or if there is a problem in the model itself....
> > Could you please let me know what you think?
> >
> > Thanks
> >
> > Marzia
> >
> >
> >
> > 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.pdf under the
> > Documentation link and press the "search" button.
> >  
> > Yahoo! Groups Links
> >
> >
> >
> >   
> 
> 
> 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.pdf under the
> Documentation link and press the "search" button.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 


========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx





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