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

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Dear Mike,
Thanks for your quick kind reply. I have another question about the
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?
Your reply will be appreciated very much.

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...

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