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Re: [EnergyPlus_Support] A question about primary and secondary loop configuration
See responses below. MJW
On 27 Dec 2007 at 10:32, Zhen Tian wrote:
> 1. The compact HVAC chilled water loop does not allow variable flow for both
> primary and decondary, it only allows varible+constant or constant+variable.
Because Compact HVAC currently supports only one chilled water setpoint,
"Variable Flow No Secondary" is equivalent to variable+variable. The flow in
the demand-side (where the coils are) will be the same as the flow in the
supply side (where the chiller is).
> 2. When I create two separate chilled water loops. I will create two chillers.
> How can I create two chilled water loops with only one chiller?
>
This is not supported.
Mike
> Thanks a lot for your help.
>
> Regards,
>
> Zhen
>
> "Michael J. Witte" <mjwitte@xxxxxxxx> wrote: If
> you want to create two separate chilled water loops using COMPACT HVAC, you
> must make two different idf files, and then merge them expidf files by hand
> using a text editor.
>
> For this particular application, it may work for you to use COMPACT HVAC to
> create a chilled water loop serving the cooling coils with variable flow
> primary and variable flow secondary. Then, using the expidf file, add LOW TEMP
> RADIANT SYSTEM:CONSTANT FLOW to the simulation.
>
> Mike
>
> On 20 Dec 2007 at 11:02, Zhen Tian wrote:
>
> > Dear all,
> >
> > I have a question about the configuration of primary and secondary chilled
> water > loops. > > The primary chilled water loop has variable flow pump.
> Connected secondary loops > have two pumps, one constant flow pump for radiant
> panels and one variable flow > pump for cooling coils. In the compact HVAC, it
> does not allow two chilled water > loops. Does anyone has experience how to
> arrange this configuration? > > Thanks a lot in advance. > > Regards, > > David
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> ========================================================
> 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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