# Re: [EnergyPlus_Support] Re: how to identify the "Temp rise coefficient" of Chiller:Electric

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That might work, except the air-side performance of a chilled water coil in a
fan coil unit will be very different from the performance of a DX air coil,
especially the latent performance.  So, I think a better approximation would be

Mike

On 16 Mar 2005, at 1:41, deserteagle_zhou wrote:

>
>
> Dear Mike,
> multi-evaporator system. It seems that no existing modules can be
> made up to simulate it. Do you have any suggestion?
> A proposed scheme is to use chiller:elctric + fancoil(one coil per
> room) and presume that the water side of plant have a ideal cooling
> distribution,and then replace the performence curve of chiller with
> that of multi-evaporator plant. I hope that it will give a similar
> energy consumption . Is it feasible?
>
> Eric Zhou
>
>
>
>
>
>
>
>
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
> <mjwitte@g...> wrote:
> > This can be calculated by looking at a set of performance data for
> the chiller
> > for a range of evaporator and condenser water temperatures.  For
> example, say
> > an electric chiller has a nominal capacity of 1000W at 6.7C Design
> Evaporator
> > Outlet and 29.4C Design Condenser Inlet.  Find another set of
> water
> > temperatures at which the same chiller delivers 1000W of capacity
> (you may have
> > to interpolate to find such a point in the performance data).  For
> example, say
> > the chiller also has a capacity of 1000W at 8C Evaporator Outlet
> and 32C
> > Condenser Inlet.  Then the Temp Rise Coefficient would be (32-
> 29.4)/(8-
> > 6.7)=2.6/1.3=2.0.
> >
> > Mike
> >
> >
> > On 15 Mar 2005, at 1:57, deserteagle_zhou wrote:
> >
> > >
> > >
> > > Hi,everybody
> > >
> > > I am studying the module Chiller:Electric now .How to identify
> > > the "Temp rise coefficient" of Chiller:Electric ? How to get
> > > "Required entering condenser air or water temperature to
> maintain
> > > rated capacity" and "Required leaving evaporator water outlet
> > > temperature to maintain rated capacity". What do the two
> parameters?
> > >
> > > thank you very much!
> > >
> > >
> > >
> > >
> > >
> > >
> > > 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.
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> >
> > ========================================================
> > Michael J. Witte, GARD Analytics, Inc.
> > EnergyPlus Testing and Support
> > EnergyPlus-Support@g...
>
>
>
>
>
> 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.
>
>
>
>
>
>
>
>
>
>

========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx

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