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[EnergyPlus_Support] Re: Autosizing full FA with heat recovery
Hi Fred,
Thank you for your response.
Is it possible to to force 100% fresh air through the system when
autosizing a heat recovery unit for the fresh air? (you probably
implied that in your answer, I'm sorry if I didn't pick up on it).
Kind regards
-Elmer
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, fred buhl <wfbuhl@...>
wrote:
>
> Elmer - it is my impression that one can size an air system (and
subsequent
> plant) for 100% outside air by choosing "Cooling 100% Outside
Air" to
> be yes
> in System Sizing (and maybe also "Healing 100% Outside Air" yes).
Can one
> have the autosizing take into account heat recovery? No. That is
on the
> to do list.
>
> Fred Buhl
>
> Elmer Morrissey wrote:
>
> >Hi Mike,
> >
> >Thank you for the response. I am trying to autosize the OA air
> >flowrate but I want full FA (I can't recirc the air due to
> >pollutants). As a result, I want to size the full system, so I
want
> >to autosize the full plant so that it can deal will tempering
100%
> >FA conditions. So I guess, I am trying to autosize everything on
the
> >air and water loop. Should this pose problems?
> >
> >From what you are saying, if you are trying to autosize
absolutely
> >everything , you can't force full FA through the air loop (when
you
> >have a heat recovery unit). Am I right in saying this?
> >
> >Kind regards
> >
> >-Elmer
> >
> >
> >
> >--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
> ><mjwitte@> wrote:
> >
> >
> >>Sorry about the slow response. I do not understand the
question.
> >>
> >>
> >What are you
> >
> >
> >>trying to autoszie - the coils or the OA flow rate? It may not
be
> >>
> >>
> >possible to
> >
> >
> >>do this with autosizing. You may have to get preliminary sizes
> >>
> >>
> >and force some
> >
> >
> >>flow rates or capacities once you know the main system flow
rate.
> >>
> >>
> >Perhaps with
> >
> >
> >>more details or an input file, we can determine how to help.
> >>
> >>Mike
> >>
> >>
> >>On 8 May 2006 at 23:22, Elmer Morrissey wrote:
> >>
> >>
> >>
> >>>Hello all,
> >>>
> >>>How can you autosize full fresh air when you have a heat
recovery
> >>>system in an AHU.
> >>>
> >>>The system is a Heat recovery -> Mixer -> fan -> heating coil -
>
> >>>
> >>>
> >zone
> >
> >
> >>>-> return
> >>>
> >>>In the past, I used an enconmizer to dummy up full FA control
> >>>throughout the year. However, I have to set the controller to
> >>>
> >>>
> >BYPASS
> >
> >
> >>>in the Controller: OUTISIDE AIR which makes the old way
> >>>
> >>>
> >impossible to
> >
> >
> >>>implement.
> >>>
> >>>Can anyone point me in the right direction?
> >>>
> >>>Kind regards
> >>>
> >>>-Elmer
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>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.idf
> >>>
> >>>
> >and press the
> >
> >
> >>>"search" button.
> >>>
> >>>Yahoo! Groups Links
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>========================================================
> >>Michael J. Witte, GARD Analytics, Inc.
> >>EnergyPlus Testing and Support
> >>EnergyPlus-Support@
> >>
> >>
> >>
> >
> >
> >
> >
> >
> >
> >
> >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.idf
and press the "search" button.
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> [Non-text portions of this message have been removed]
>
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