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Re: [EnergyPlus_Support] VertexEntry - Surface Geometry -- retract
1. Yes, you need to describe a surface in each zone and connect them via the
OutsideFaceEnviornmentObject field.
2. Each surface uses the full set of layers for the wall. If the wall is
symmetrical (e.g. gypsum, insulation, gypsum), then the same CONSTRUCTION can
be used by both surfaces. If the layers are not symmetrical, then create two
constructions, one with the layers in reverse order.
3. If the zones on both sides are conditoned to the same temp, then is it
worthwhile to model this as an interzone surface?
Mike
On 23 Sep 2004, at 14:53, Tim Britton wrote:
> Thanks for your reply Mike,
>
> I have another question..
> I am modelling two zones that share an internal wall, does each zone need to
> contribute a surface to the shared wall ie should i enter two surfaces, one for
> each zone so that there will be a wall from one zone adjacent another wall from
> the other zone? If so does energyplus use just one construction for the shared
> wall and to calculate heat transfe or is there a doubling up of the cnstruction
> due to the two surfaces being side by side ? In this case I want to calculate a
> cooling load but both zones will air conditioned to the same temp.
>
> Tim
> ----- Original Message -----
> From: Michael J. Witte
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Sent: Wednesday, September 22, 2004 2:22 PM
> Subject: Re: [EnergyPlus_Support] VertexEntry - Surface Geometry -- retract
>
>
> As Linda said, CW vs CCW will change the facing direction of the surface. To
> check the resulting azimuth and tilt for all surfaces, add this command to
> your input file:
>
> Report, Surfaces, Details;
>
> This produces a list of each surface in the eio output file which includes
> azimuth, tilt, area, etc. It is comma delimited and most easily read by
> putting into Excel or the like.
>
> Mike
>
>
> On 20 Sep 2004, at 15:45, Linda Lawrie wrote:
>
> >
> > At 11:02 PM 9/19/2004, Tim Britton wrote:
> > >How crucial is it to enter all surfaces according to the VertexEntry field
> (ie > >as either clockwise or anticlockwise) under Surface Geometry ? I am
> exporting > >from Ecotect to EnergyPlus and the vertices of some surfaces are
> listed as > >clockwise while others are listed as anticlockwise after
> exporting the idf file > >to EnergyPlus. Is it necessary to correct the file
> so that all surfaces are > >entered all the same or can it be left with some
> surfaces as clockwise and > >others as anticlockwise? > > What I said before
> is WRONG. It always makes a difference if you're > telling EnergyPlus that
> you're putting things in CW and end up CCW or vice > versa. -- The
> difference, of course, is the facing direction and whether you've > got it
> correct or not. I'm working on a method so I can tell if you're putting >
> them in incorrectly (and then will issue a warning as well as correct the >
> problem -- but not for this release 1.2.1) > > What I should have said is that
> the starting "corner" may be able to be > changed -- If it's a flat surface
> (ceiling, roof or floor), then it may not > matter. If it's a wall, it does
> matter, I believe. > > If I were you and Ecotect is not giving you the proper
> translation, I would > certainly bring it to their attention. > > > Linda > >
> EnergyPlus WebSite: http://www.energyplus.gov > Owner: EnergyPlus_Support list
> > Member: EnergyPlus Development Team > > > > [Non-text portions of this
> message have been removed] > > > > > 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. > > Yahoo! Groups Links > > > > > > > >
>
>
>
> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support
> EnergyPlus-Support@xxxxxxxx
>
>
>
>
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx
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