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

["deserteagle_zhou" <yp5166@xxxxxxx>]

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





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