Re: [EnergyPlus_Support] ATU - Heat recovery with no mixture

[Richard Raustad <RRaustad@xxxxxxxxxxxx>]

Which output variables should I look at more closely to check this behavior?

In a spreadsheet, sum all the zone return node mass flow rates and 
compare this value to the outside air systems exhaust node mass flow 
rate and the outside air systems outside air node mass flow rate.

Michael J. Witte wrote:
>
> Yes. this will provide 100% outside air with heat recovery and no
> recirculation. However, the outside air flow will never be more than the
> system supply flow rate. So, when the VAV terminal units reduce the total
> system flow rate, the outside air flow rate will be reduced to match.
>
> Mike
>
> On 12 Jan 2008 at 1:44, anarui.oliveira wrote:
>
> > Hello again.
> >
> > If in the Compact HVAC:System:VAV I set:
> > - Heat recovery to sensible
> > - both the Fan Max and Min Flow rate, and both the Max and Min Outside
> > Air Flow rate to the same value,
> > - and Outside Air Control Type to fixed minimum
> > do I get a system that exhausts to the outside all the return air of
> > the ATU, recirculating none to the inside and substituting it by
> > outside air, at a fixed rate, but first using the return air to do
> > sensible heat recovery?
> >
> > Which output variables should I look at more closely to check this
> > behaviour?
> >
> > Thanks,
> > Ana Rui.
> >
> >
> >
> > The primary EnergyPlus web site is found at:
> > http://www.energyplus.gov <http://www.energyplus.gov>
> >
> > The group web site is:
> > http://groups.yahoo.com/group/EnergyPlus_Support/ 
> <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 <mailto:EnergyPlus-Support%40gard.com>
>
>  

-- 
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
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