Re: [EnergyPlus_Support] Control of OnOff Fan

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

The UNIT VENTILATOR with "outside air control type" = FIXED AMOUNT will model 
what you want.  If there is no load, the fan should remain off.  If there is a 
load (heating or cooling) the fan will run for that timestep.

Mike


On 11 Jan 2008 at 8:57, Michael J. Witte wrote:

> The EnergyPlus fan coil model does not support cycling fans.  It only models
> continuous fans.  The fans are on when the availability schedule is >0, off when
> the availability schedule =0.  The zone thermostat has no impact on fan
> operation, it only controls the heating and cooling coils.
> 
> Mike
> 
> On 7 Jan 2008 at 17:10, anarui.oliveira wrote:
> 
> > Hello.
> > For the system I created with Compact: HVAC: Fan Coil (I'm already 
> > working with the expanded file):
> > - If I want to shut off the fan when no heating or cooling is required, 
> > can I use Fan: Simple: OnOff ?
> > - I tried to create this alternative object (I assigned it the same 
> > nodes as were defined in the default Fan: Simple: ConstVolume object) 
> > and substitute it into the Fan Coil: 4 pipe,
> > - but I can't understand, from the Help files, waht is the principle to 
> > actually control the fan so as to make it turn off when no 
> > cooling/heating is necessary.
> > Can you help me?
> > 
> > Regards,
> > Ana Rui.
> > 
> > 
> > 
> > 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
> 
> 
> 
> 
> 
> 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
> 
> 
> 
> 
> 






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