Re: [EnergyPlus_Support] Chiller Performance Data Sets

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

I can see the AddDataSets.zip file there in the yahoo group files area.  Please 
try again.

The chiller performance curves are also included in the standard install 
package in DataSets\Chillers.idf

Mike


On 10 Sep 2007 at 23:07, Ian Doebber wrote:

> Has the dataset for chiller performance curves been taken off the yahoo
> groups page.  I can't find it.
> 
> 
> 
> http://tech.groups.yahoo.com/group/EnergyPlus_Support/files/Release_Piec
> es/
> 
> File:
> 
> AllDataSets.zip
> 
> 
> 
> Ian Doebber
> 
> Arup
> 
> Mechanical Engineer
> 
> Cell : 415-613-4314
> 
> Fax : 415-957-9096
> 
> ________________________________
> 
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Ian Doebber
> Sent: Tuesday, September 11, 2007 2:00 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] inputs for EIR performance cureve
> 
> 
> 
> For the Chiller EIR input, below is the equation to calculate the EIR
> based on the Part Load Ratio. I am modeling air cooled chillers. 
> 
> What is "r1" and "dT" refer to? I'm assuming that "r1" is the actual
> cooling load divided by the maximum cooling capacity based on the
> condenser temperature (ambient dry bulb temperature) and "dT" is the
> difference between the chilled water supply and return temperature
> (which is 10 with 44 supply and 54 return). I'm getting numbers that
> are extremely low especially for low PLRs. I would think that the
> maximum efficiency would be around 40-60% PLR but am not seeing this.
> 
> BI-QUADRATIC-RATIO&dT The curve is bi-quadratic in 2 independent
> variables. It has the form 
> 
> f(r1,dT) = c1 + c2*r1 + c3*r12 + c4*dT
> + c5*dT2 + c6*r1*dT, 
> 
> where c1, c2, c3, c4, c5, and c6 are
> coefficients. R1 is a dimensionless variable. dT is a variable with
> units of delta temperature. 
> 
> Ian
> 
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> 
> The primary EnergyPlus web site is found at:
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> 
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> 
> Attachments are not allowed -- please post any files to the appropriate folder
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> 


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





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