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Re: [EnergyPlus_Support] Performance curves of electric chiller

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Performance curves of electric chiller
From: "Wong, S L" <bclwong@xxxxxxxxxxxx>
Date: Thu, 02 Oct 2003 11:01:11 +0800
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Dear Richard,

How can define the Delta T using the data from catalogue? Have catalogue 
give out the required and rated condenser and evaporator temperatures and 
where can I find those data?

lee

At 08:26 AM 9/30/2003 -0500, you wrote:
>Hello,
>The TempRiseRate is defined in the IOReference manual on page 392 in the
>new release documentation and is a user input.
>
> From the manual:
>Field: Temp Rise Coefficient
>This numeric field contains the electric chiller's temperature rise
>coefficient which is defined as the ratio of the required change in
>condenser water temperature to a given change in chilled water temperature,
>which maintains the capacity at the nominal value.  This is calculated as
>the following ratio:
>TempRiseRate =  (TCEnt req - TCEnt rated)/(TELv req - TELv rated)
>where:
>TCEntrequired = Required entering condenser air or water temperature to
>maintain rated capacity
>TCEntrated = Rated entering condenser air or water temperature at rated
>capacity.
>TELvrequired = Required leaving evaporator water outlet temperature to
>maintain rated capacity
>TELvrated = Rated leaving evaporator water outlet temperature at rated 
>capacity
>
>
>Thanks Richard Liesen
>
>
>
>At 09:22 AM 9/30/2003, Wong, S L wrote:
> >Dear Richard,
> >
> >What's the definition of TempRiseRat?
> >
> >lee
> >
> >At 12:30 PM 9/29/2003 -0500, you wrote:
> > >Hello,
> > > From the EPlus source code is the definition of
> > >DeltaTemp.  TempCondInDesign & TempEvapOutDesign are entered by the User.
> > >
> > >!Calculate chiller performance from this set of performance equations.
> > >!  from BLAST...Z=(TECONDW-ADJTC(1))/ADJTC(2)-(TLCHLRW-ADJTC(3))
> > >!
> > >         DeltaTemp= (TempCondIn   -  TempCondInDesign) / TempRiseRat &
> > >                          - (TempEvapOut -  TempEvapOutDesign)
> > >
> > >!  from BLAST...RCAV=RCAVC(1)+RCAVC(2)*Z+RCAVC(3)*Z**2
> > >!
> > >          AvailNomCapRat =   CapacityRat(1) + CapacityRat(2) *
> > > DeltaTemp       &
> > >                                       + CapacityRat(3) * DeltaTemp ** 2
> > >
> > >
> > >Thanks Richard Liesen
> > >
> > >
> > >At 04:04 AM 9/26/2003, leeslwong wrote:
> > > >Dear all,
> > > >
> > > >What is the equation to determine the delta T in the equation of
> > > >Capacity Ratio Curve in Chiller:Electric?
> > > >
> > > >lee
> > > >
> > > >
> > > >
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Follow-Ups:
- Re: [EnergyPlus_Support] Performance curves of electric chiller
  - From: Richard J. Liesen

References:
- Re: [EnergyPlus_Support] Performance curves of electric chiller
  - From: Wong, S L
- Re: [EnergyPlus_Support] Performance curves of electric chiller
  - From: Richard J. Liesen
- [EnergyPlus_Support] Performance curves of electric chiller
  - From: leeslwong
- Re: [EnergyPlus_Support] Performance curves of electric chiller
  - From: Richard J. Liesen

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