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[EnergyPlus_Support] Re: Reformulated Electric EIR chiller
The leaving chilled water temperature is 6 degree C and the leaving
condenser water is 35 degree C.
thanks.
Yiqun
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Lixing Gu <gu@...> wrote:
>
> Yiqun:
>
> When a normal chiller is used, leaving chilled water temperature
and
> entering cooling water temperature are used to calculate COP using
the
> Energy Input to Cooling Output Ratio Function of Temperature Curve
and Part
> Load Ratio curve. When a reformulated chiller is selected, Leaving
Chilled
> Water Temperature and Leaving Condenser Water Temperature are used
to
> calculate an EIR modifier, instead of entering cooling water
temperature.
> Leaving Condenser Water Temperature and Part Load Ratio are used to
> calculate part load penalty. Could you let me know what leaving
condenser
> water temperature and leaving chilled water temperature are?
>
> Thanks.
>
> Lixing
> ----- Original Message -----
> From: "潘毅群" <yiqunpan@...>
> To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
> Sent: Thursday, July 17, 2008 3:52 AM
> Subject: [EnergyPlus_Support] Reformulated Electric EIR chiller
>
>
> > On the Engineering Reference, it is said that the reformulated EIR
> > chiller model can improve the accuracy of simulating a VSD chiller
> > significantly from normal EIR chiller model. However I got some
> > ubnormal results from the reformulated model. I selected a model
from
> > the chiller datasets of E+ - ReformEIRChiller Trane CVHF
> > 2317kw/6.33COP/VSD, and tried to obtain the changing trend of COP
> > following its part load ratio and found that its COP decreases
with the
> > part load ratio decreases, with the same leaving chilled water
> > temperature and entering cooling water temperature. I also tried
with a
> > normal EIR chiller model from the datasets, but got different
changing
> > trend, which COP reaches its peak when the part load ratio is
aroung
> > 50%. It seems that the result from normal EIR chiller model is
more
> > close to the actural condition.
> >
> > Has anybody tried the same thing and is able to tell me something
about
> > it? thanks.
> >
> > Yiqun Pan
> > Tongji University
> >
> >
> > ------------------------------------
> >
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> >
> >
> >
> >
>
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