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[EnergyPlus_Support] Re: QUESTION ON AIR COOLED CONDENSER INLET TEMPERATURE
Hi, Richard,
Thanks for your response. Actually I am not really operating the
chiller in cold days. Right now I am just running the file for winter
and summer design days, in order to get the auto-sizing information.
I am hoping there is be no such warning when I do the entire year
simulation.
Thanks again,
Chaoqin
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad
<RRaustad@F...> wrote:
> Why is your chiller operating on such a cold day?
>
> Air-cooled chillers should not be used in cold climates without
freeze
> protection. Energyplus does not currently support freeze protection
on
> electric chillers. If you want to continue to use the air-cooled
> electric EIR chiller, limit the minimum outdoor temperature in the
> Cooling Capacity Function of Temperature Curve and Energy Input to
> Cooling Output Ratio Function of Temperature Curve objects to 0C
and
> verify that the output makes sense (i.e. Capacity and Power at this
low
> temperature is reasonable). Limiting the minimum outdoor
temperature
> "caps" the capacity and power at 0C and simulates the use of
heaters to
> maintain chiller performance. This heater power will not be
accounted
> for in the simulation. If the output makes sense you can disregard
the
> warnings. Otherwise change to a water cooled chiller where the
entering
> condenser water temperature can be better controlled.
>
> zhaicq98 wrote:
>
> > Hi,
> >
> > I am simulating a system with an air-cooled electric chiller.
However I
> > got lots of warning messages, saying:
> >
> > ElectricEIRChillerModel:Air Cooled Condenser Inlet Temperature
below 0C
> >
> > What should I to with regard to these warnings? I am using the
chiller
> > in a relatively cold climate.
> >
> > Thanks,
> > Chaoqin
> >
> >
> >
> >
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>
> --
> Richard A. Raustad
> Senior Research Engineer
> Florida Solar Energy Center
> University of Central Florida
> 1679 Clearlake Road
> Cocoa, FL 32922-5703
> Phone: (321) 638-1454
> Fax: (321) 638-1439 or 1010
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