Re: [EnergyPlus_Support] Average COP of chillers

["Michael J. Witte" <mjwitte@xxxxxxxx>]

Lee:  

One thing to look at is the design values for leaving evaporator temperature 
and entering condenser temperature.  Compare those with your setpoints for 
chilled water and condenser water.

Mike


On 25 Nov 2003, at 9:18, Wong, S L wrote:

> I am using 1.1.0.020.
> 
> lee
> 
> At 12:10 PM 11/24/2003 -0600, you wrote:
> >Are you using 1.1.0.018 or 1.1.0.020?  There was a significant bug in 
> >1.1.0.018
> >related to chiller part load power consumption which was fixed for the
> >1.1.0.020 release.
> >
> >Mike
> >
> >
> >On 24 Nov 2003, at 15:22, leeslwong wrote:
> >
> > > I used the E+ version 1.1.0 to simulate my reference building with
> > > six identical electric air-cooled chillers. The cooling capacity of
> > > each chiller is 1060kw and the nominal COP is 2.8. The used part load
> > > curves are follow the example file of the E+ program. After
> > > simulation, the total annual cooling demand (chiller loop demand) is
> > > 9196MWh and the total annual chillers' electricity consumption is
> > > 8.8x10^2 J (2144MWh). The calculated average COP is about 3.76. The
> > > question is why the calculated COP of 3.76 is extremely higher the
> > > nominal COP I enter into the input file? Is it anything wrong in my
> > > input file or anything wrong in version 1.1.0 of E+? Is result will
> > > be more reasonable if using the version 1.1.1 of E+? Please give me
> > > advices.
> > >
> > > Thanks
> > >
> > > lee
> > >
> > >
> > >
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> >========================================================
> >Michael J. Witte, GARD Analytics, Inc.
> >EnergyPlus Testing and Support
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