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Re: [EnergyPlus_Support] Re: Ventilation control - see file
You would only be able to control the ventilation rate of an air loop
based on a single zones thermostat set point. The outside air will
modulate to try and meet the zone load where the thermostat is located.
This is done using set point managers SET POINT MANAGER:SINGLE ZONE
COOLING (17C with control node at the air loop outlet node) and SET
POINT MANAGER:MIXED AIR (control node at the outside air mixer's mixed
air node). The thermostat dead-band is specified in the heating and
cooling set points. I do not know of a way to simulate the control range
(1 through 4) in your drawing since the ventilation will be modulated to
control a load at a fixed zone temperature (0 in your figure - a
vertical line). You should use an outside air flow rate large enough to
meet the maximum zone load since you would probably want to maintain
zone temperature in your study.
sartori_igor wrote:
>
> Thanx a lot for your quick reply!
>
> but...
> Let aside for one moment the CO2 control.
>
> Let's say that I want only the temperature control... which is
> actually only an attempt of control, because at a certain point the
> maximum flow rate is reached and after that room temperature will
> fluctuate (hopefully not too much, depending also on the exposition of
> thermal mass, which is one object of the study).
>
> Is it possible to define a zone control of the ventilation flow rate
> as the one described in the Figure of the attached file? I mean
> defining explicitly the dead-band and the control-range?
>
> If not at zone level, is it possible at system level?
>
> Igor
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>, Richard Raustad
> <RRaustad@...> wrote:
> >
> > So you want the ventilation to control the CO2, but at times you want
> > the ventilation rate to increase to satisfy the temperature. The only
> > way I can think to do this is to run 2 simulations, the 1st with only
> > mechanical ventilation to satisfy the occupancy/material emissions and
> > the 2nd to satisfy only the zone temperature. Then take the 2
> > ventilation rates and calculate a new "minimum outside air schedule"
> > which is the maximum ventilation rate from the 2 simulations. See
> > documentation for Schedule:File:Comma.
> >
> > sartori_igor wrote:
> > >
> > > Hei all,
> > >
> > > I have a problem understanding how to implement a specific ventilation
> > > control in E+.
> > >
> > > You will find the description of the problem in the file:
> > >
> > > "Ventilation control_E+ yahoo group.doc"
> > > (under the menu "Files")
> > >
> > > please take a look to it, it is just 1 figure and 1 formula, nothing
> > > scary to understand! (but perhaps to implement?)
> > >
> > > Thanks very much to anyone who would have suggestions or comments
> > > about this.
> > >
> > > Igor
> > >
> > >
> >
> > --
> > 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 <http://www.fsec.ucf.edu>
> >
> > UCF - From Promise to Prominence: Celebrating 40 Years
> >
>
>
--
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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