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[EnergyPlus_Support] Re: warning about " Temperature out of range (too high) for glycol specific heat



Hi Linda,

Thank you for your response. 

I also found that there is no warning message when water temperature
in hot water loop is below 0 Degree C.  In this case, I use hot water
to preheat outdoor air. Then it makes sense if water is also a glycol
in EnergyPlus.

Do u think the following warning is serious or not?
** Warning ** GetSpecificHeatGlycol: Temperature is out of range (too
high) for glycol specific heat **
** ~~~ ** ..Temperature=1675.85 Occurrence info=CALGARY INT'L AB
CAN WYEC2-B-25110 WMO#=718770, 04/05 06:00 - 07:00

Maybe it is hard to answer.  At least, I do not find high temperature
like that in all system nodes from excel file. 

Thanks a lot. 

Tj Ywh


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Linda Lawrie <linda@...> wrote:
>
> water is a glycol so where ever you use water, such as when you used 
> them in your
> 
> HEAT EXCHANGER:HYDRONIC:FREE COOLING,
>      Free Cooler,             !- Name of free cooling heat exchanger
>      Main Chiller,            !- Controlled component name
>      CHILLER:ELECTRIC:EIR,    !- Controlled component type
>      Free Cooling Schedule,   !- Setpoint schedule name
>      Free Cooler Condenser Inlet Node,  !- Condenser side fluid
inlet node
>      Free Cooler Condenser Outlet Node,  !- Condenser side fluid
outlet node
>      Free Cooler Inlet Node,  !- plant side fluid inlet node
>      Free Cooler Outlet Node, !- plant side fluid outlet node
>      water,                   !- Condenser loop fluid name (water, 
> ethylene glycol, etc.)
>      water,                   !- plant loop fluid name (water, 
> ethylene glycol, etc.)
>      DRYBULB,                 !- Free cooling control mode (outside 
> wetbulb, outside drybulb, setpoint schedule)
>      Free Cooling Schedule,   !- Heat Exchanger Setpoint schedule 
> name (deprecated)
>      UA-EFFECTIVENESS,        !- Heat exchange mode
>      150000,                  !- UA {W/K}
>      0.0173,                  !- condenser side flow rate {m3/s}
>      0.0113,                  !- plant side flow rate {m3/s}
>      Main Chiller Cnd Inlet,  !- Controlled equipment condenser side
inlet node
>      Main Chiller Cnd Outlet, !- Controlled equipment condenser side 
> outlet node
>      Main Chiller ChW Inlet,  !- Controlled equipment plant side
inlet node
>      Main Chiller ChW Outlet; !- Controlled equipment plant side
outlet node
> 
> it uses the fluid properties for water from the glycol set.
> 
> Linda
> 
> At 08:35 AM 9/5/2007, tjutw wrote:
> 
> >Hi Linda,
> >
> >I do not find related information from EnergyPlus documents.
> >Would you please tell me which models automatically include glycol and
> >water?
> >
> >Thanks.
> >
> >Tj Ywh
> >
> >--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Linda Lawrie" <linda@>
> >wrote:
> > >
> > > Several models automatically include the "glycol" "water" in their
> > > calculations.  If you send in your input file, perhaps we can help
> > > more.
> > >
> > > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "tjutw" <tjutw@> wrote:
> > > >  ** Warning ** GetSpecificHeatGlycol: Temperature is out of range
> > > (too
> > > > high) for glycol specific heat **
> > > > **   ~~~   ** ..Temperature=1675.85 Occurrence info=CALGARY
INT'L AB
> > > > CAN WYEC2-B-25110 WMO#=718770, 04/05 06:00 - 07:00
> > > >
> > > >  *************  ** Warning ** GetSpecificHeatGlycol:
Temperature out
> > > > of range (too high) for glycol specific heat
> > > >    *************  **   ~~~   **   This error occurred 4318 times.
> > >
> > > Linda
> > >
> >
> >
> >
> >
> >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
> >
> >
> >
> 
> 
> [Non-text portions of this message have been removed]
>




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