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Re: [EnergyPlus_Support] Re: Plant and System changes during macro runs
Large ##if blocks will work, but it can become difficult to navigate the file
for editing, especially if there are many different system alternatives or if
the system descriptions serve many zones.
An alternative approach is to break the input file into major sections and use
##include (or ##includesilent which runs a little faster) to pull in the
different system descriptions. For example, your master input file could have
just the building description with no HVAC, then make two or more idf files
which contain the full description for one system alternative. In the master
file, use ##if blocks which simply contain a ##include statement to read in the
desired system description.
Mike
On 13 Aug 2007 at 13:13, elizabeth.ricker wrote:
> Mike,
>
> Thanks for your response. I have been using the ##if blocks to
> institute smaller changes - like changing material conductivities -
> and I understand the potential for using the compact HVAC objects,
> but I am interested in installing customized HVAC systems. I
> understand that using the ##if blocks is one way of doing this, but
> this may require replacing large blocks of code to make major system
> changes (like going from an electric baseboard heating sytem to a
> water-based baseboard heating system). Have you observed any issues
> with doing this? Are Compact HVAC system the only other way
> of "simply" switching between HVAC systems when running a macro? I
> hope this explains what I am interested in a little bit better. I
> would just like to make sure that I do not make this more difficult
> than I need to!
>
> Thank you for your help!
>
> Betsy
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
> <mjwitte@...> wrote:
> >
> > My apologies for the slow response . . .
> >
> > I am not exactly sure what you are asking. Depending on the system
> type, you
> > may be able to use Compact HVAC objects to simplify creating the
> base file.
> > But ultimately, you will need to create the objects that describe
> the
> > alternative systems. You can use ##if blocks to conditionally
> activate the
> > different sections of input to automatically switch from one system
> alternative
> > to another.
> >
> > Mike
> >
> >
> > On 1 Aug 2007 at 20:16, elizabeth.ricker wrote:
> >
> > > Hi all,
> > > I am running some simulations of school building that has an
> > > electric resistance heating system, which I am retrofitting to
> have a
> > > water-based heating system. I am interested in using the EPlus
> macro
> > > capability to make this substitution (and other plant or system
> > > changes). I have utilized the macro capability for several
> simple
> > > retrofits like insulation thickness and ventilation flow rates,
> but I
> > > am not seeing an immediately available way of changing out the
> boiler
> > > for district heating or installing a heat pump without performing
> > > manual input changes. Is there a way to do install these
> retrofits
> > > using the Eplus macro capabilities? Do you have any other
> suggestion
> > > on how I could make these changes without manually chaning the
> input
> > > files?
> > >
> > > Thanks!
> > >
> > > Betsy
> > >
> > >
> > >
> > > 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@...
> >
>
>
>
>
> 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:
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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.
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