[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [EnergyPlus_Support] Re: how to change the outdoor air flow rate?
See documentation for the Schedule:File object. You should be able to
set the OA system min and max flow rate to be the same, use fixed
minimum flow rate, and then use a schedule (Controller:Outdoor Air -
field Minimum Outdoor Air Schedule Name) to calculate the OA system's
actual minimum flow rate. The schedule would be a fraction of the
maximum flow rate (and minimum since these would be the same). You would
have to create this schedule based on the desired flow rate in a
spreadsheet and save it as a comma separated file. You would specify the
file name in the Schedule:File object.
yunpeng.hu wrote:
>
> Hi, Lee.
> I have no idea about how to use external file to feed E+ hourly data
> once at the beginning of the simulation.
> Would you mind show me more detail?
> Thank you very much!
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com>, "Edwin Lee"
> <leeed2001@...> wrote:
> >
> > I'm pretty sure EnergyPlus won't interact with software like Matlab
> during a
> > simulation, however, if you know the schedule for outdoor air at
> different
> > time steps (hours), you can use an external file to feed E+ hourly
> data once
> > at the beginning of the simulation.
> > Edwin
> >
> > On Sun, Jan 18, 2009 at 4:10 PM, yunpeng.hu <yunpeng.hu@...> wrote:
> >
> > > Why do I want EnergyPlus to INTERACT with MATLAB, FORTRAN or
> others
> > > program language?
> > > I just want to change the flow rate by myself, becasue I need the
> > > flow rate to change in certain timesteps. I want to know how the
> > > temperature changes in a given air flow rate in a VAV system, but
> the
> > > Energyplus always, in my opinion, give the trend of air flow rate
> to
> > > meet the zone setpoint.
> > > Maybe what I say has some misunderstanding, please point out!
> > > I will try my best to make it clear.
> > > Thanks a lot!
> > >
> > > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com><EnergyPlus_Support%
> 40yahoogroups.com>,
> > > D T <ellinas.1984@>
> > > wrote:
> > >
> > > >
> > > > To address your last question, whether EnergyPlus interacts with
> > > any software, I know that there are software programs you can use
> to
> > > draw up a building and define building geometry and dimensions.
> You
> > > can then export these files to EnergyPlus. From personal
> experience,
> > > I know that you can specifically use DesignBuilder (a graphic user
> > > interface software package compatible w/ EnergyPlus) to draw the
> > > facility and define the loads for your building and then export
> the
> > > idf file to EnergyPlus. I know that there is also a plugin program
> > > that lets you define building geometry as well (but I don't know
> too
> > > much about it). But, to my knowledge, I do not think that
> EnergyPlus
> > > is capable of interacting with programs such as MATLAB as you
> > > mention. Honestly, I do not understand why you would need
> EnergyPlus
> > > to interact with MATLAB.
> > > > ?> -Dimos Triantafillu
> > > >
> > > >
> > > > --- On Sat, 1/17/09, yunpeng.hu <yunpeng.hu@> wrote:
> > > >
> > > > From: yunpeng.hu <yunpeng.hu@>
> > > > Subject: [EnergyPlus_Support] how to change the outdoor air flow
> > > rate?
> > > > To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> <mailto:EnergyPlus_Support%40yahoogroups.com><EnergyPlus_Support%
> 40yahoogroups.com>
> > > > Date: Saturday, January 17, 2009, 10:50 PM
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > Hi,all.
> > > > I've defined the "Outdoor Air method" as the "sum" in the
> > > sizing:zone,
> > > > and set the "100% Outdoor Air in Cooling" as "yes". What's more
> > > > the "Minimum / Maximum fraction of Outdoor Air Schedule" is all
> the
> > > > same£¬¡°1¡±¡£
> > > > But the outdoor air flow rate can't change with the Occupy
> > > Schedule.
> > > > I've given the "Outdoor Air Flow Per Person", of course, in
> > > > the "Sizing:Zone" .
> > > > Why the outdoor air flow rate can not change with the Occupy
> > > Schedule?
> > > >
> > > > By the way, does EPlus interact with other softwrae, just like
> > > Matlab
> > > > or others?
> > > >
> > > > Thanks!
> > > >
> > >
> > >
> > >
> >
>
>
--
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
------------------------------------
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
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/EnergyPlus_Support/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/EnergyPlus_Support/join
(Yahoo! ID required)
<*> To change settings via email:
mailto:EnergyPlus_Support-digest@xxxxxxxxxxxxxxx
mailto:EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx
<*> 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/