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[EnergyPlus_Support] Re: Outside Air Mixing Box
Ok this is clear, this way I dont get recirculation air, but then
suppose I want to change the outside air flow, so I define a min OA
schedule, to simulate a mechanical ventilation system with 3 different
flow rates (variable speed fan). So when I do this then what happens
is that when the Outside air is decreased the recirculation damper
lets the return air mix with this Outside air so that that the fan
always supplies with the rated volumetric flow. I would like to see
that the flow coming out of the supply fan is also changing as the
incoming outside air, with no recirculation at all.
The fan is defined as a variable speed fan with different minimum and
maximum flow rates.
Best Regards,
Santiago
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad
<RRaustad@...> wrote:
>
> Make the OA flow rate equal to the rated volumetric flow of the air
loop
> This will make the recirc air = 0.
>
> Elreq wrote:
> >
> > I already did this. I set the min OA equal to the max OA, but I still
> > see that the recirculation is active in order to keep the rated
> > volumetric flow of the air loop always constant.
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> > <mailto:EnergyPlus_Support%40yahoogroups.com>, amit bhansali
> > <amitbhansali2003@> wrote:
> > >
> > > Hi,
> > > If you are using the new version of Energyplus , you would see two
> > schedules added in the object named Min OAflow Sched and Max OAflow
> > Sched, and give all schedule value for these as 1, so the system
> > would operate on 100% outside air.
> > >
> > > Amit Bhansali
> > > Vice President, ASHRAE Student Branch
> > > Research Assistant,Mechanical and Aerospace Engineering Department
> > > Oklahoma State University
> > >
> > >
> > >
> > > ----- Original Message ----
> > > From: lee_ching_hei <cheung5407@>
> > > To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > <mailto:EnergyPlus_Support%40yahoogroups.com>
> > > Sent: Tuesday, 7 October, 2008 8:44:02 AM
> > > Subject: [EnergyPlus_Support] Re: Outside Air Mixing Box
> > >
> > >
> > > Dear all,
> > > I am trying to add an air economizer and I met the same problem. I
> > > don't know how to control the system with 100% fresh air (without
> > > mixing with circulated air). I hope that there is someone who
can help
> > > us.
> > >
> > > Gary
> > >
> > > --- In EnergyPlus_Support@ yahoogroups. com, "Elreq" <tolteca33@ ..>
> > > wrote:
> > > >
> > > > Hello,
> > > >
> > > > Does anybody know how can I make that all the return air
entering the
> > > > mixing box is completely passed to the Relief air stream node? In
> > > > other words, I do not want any recirculation of air, so I want the
> > > > damper of the mixing box to be closed. I am trying to find a
way but I
> > > > still cant manage how to do it.
> > > >
> > > > Thanks in advance.
> > > >
> > > > Santiago
> > > >
> > >
> > >
> > >
> > >
> > > Download prohibited? No problem. CHAT from any browser,
> > without download. Go to http://in..webmessenger.yahoo.com/
> > <http://in..webmessenger.yahoo.com/>
> > >
> >
> >
>
> --
> Richard A. Raustad
> Senior Research Engineer
> Florida Solar Energy Center
> University of Central Florida
> 1679 Clearlake Road
> Cocoa, FL 32922-5703
> Phone: (321) 638-1454
> Fax: (321) 638-1439 or 1010
> Visit our web site at: http://www.fsec.ucf.edu
>
> UCF - From Promise to Prominence: Celebrating 40 Years
>
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