Re: [EnergyPlus_Support] COMIS capabilities

["Joe Huang" <yjhuang@xxxxxxx>]

COMIS is supplied as part of EnergyPlus.  It is Version 3.0, with some
programming changes to avoid name clashes with EnergyPlus, and to make it
compliant with Fortran 90.

COMIS is compiled as a module within EnergyPlus, but it runs essentially as
a separate program at each time step of the thermal simulation, and
exchanges data with the thermal model in EnergyPlus. If COMIS is selected as
the air-flow model in EnergyPlus, it will be called within the
HeatBalanceAirManager module of EnergyPlus.  If COMIS is used within
EnergyPlus, there will be noticeable increase in the simulation time.

The current implementation allows for only one airflow network. If you want
to model multiple separate airflow networks, you would have to run them as
separate EnergyPlus/COMIS runs.

Although COMIS 3.0 allows for vertically stacked subzones with user-defined
temperature differences between them, this feature has not been implemented
in the EnergyPlus/COMIS link.

Joe Huang

----- Original Message ----- 
From: "mkenergycentre" <mkenergycentre@xxxxxxxxxxx>
To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Friday, July 23, 2004 1:52 AM
Subject: [EnergyPlus_Support] COMIS capabilities


> Dear All,
>
> Some quick questions about COMIS:
>
> 1) Is COMIS supplied as part of EnergyPlus? Is it COMIS 3.0? Or has
> it been developed in any way? If so, does anyone have a list of these
> additional developments?
>
> 2) How is the simulation with COMIS performed? i.e. does COMIS run
> separately as another executable and the two programs exchange data
> as the simulation proceeds, or has the COMIS source code been
> integrated into the main simulation of EnergyPlus? If it's the former
> does this make the simulation slower?
>
> 3) Can COMIS simulate more than one air network at a time? (e.g. a
> semi-detached house where heat transfers through the party wall, but
> the air flows in each house are not connected). If not, what would be
> the best way to approach this semi-detached problem with the current
> software?
>
> 4) In tall atria (or other large spaces) it is useful to simulate
> stratification effects by 'stacking' zones one on top of the other
> vertically. Is COMIS able to simulate the air movement through these
> large horizontal openings between the zones? If not, what is the
> recommendation for simulating a large stratified space?
>
> Thanks in advance
> David.
>
>
>
>
>
> 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
>
>
>
>
>



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