Re: [EnergyPlus_Support] Performance curve for the chiller

[wing sun lee <samwslee@xxxxxxxxxxxx>]

"Michael J. Witte" <mjwitte@xxxxxxxx> wrote:Using the equations in the Input Output Reference (or Engineering Reference), 
make a spreadsheet to take the catalog data and calculate values for each curve 
over a range of chilled water and condenser water temperatures.  Then use the 
spreadsheet curve-fitting function to compute the coefficients for the 
appropriate curve type (bi-quadratic, quadratic, etc.).  This is not a trivial 
task, and we are planning to develop a spreadsheet which can be shared on the 
yahoo group, but it will be some time before this task can be accomplished.  It 
is important to check the currves by creating more columns in the spreadsheet 
to compute the curve values and check the results against the original catalog 
data.

Mike


On 17 Feb 2005, at 0:21, wing sun lee wrote:

> 
> Hi,
> 
> I want to know how to determine the coefficients of Curve:Biquadratic from the
> performance data of chiller in catalogue.
> 
> Regards,
> 
> SAMLEE
> 
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx




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Hi, 

I have already checked the microsoft office excel, but it can only solve the curve fit for linear and quadratic equation by the Linest() function.

Regards,

SAMLEE

 


借過、一拍兩散、奇洛李維斯回信...
全港最大手機下載中心
http://mobile.yahoo.com.hk/


[Non-text portions of this message have been removed]



The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

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